116-500: The Volkswagen XL1 (VW 1-litre) is a two-person limited production diesel-powered plug-in hybrid produced by Volkswagen . The XL1 car was designed to be able to travel 100 km on 1 litre of diesel (280 mpg ‑imp ; 240 mpg ‑US ), with a fully charged battery, while being both roadworthy and practical. Without using electric, the XL is able to travel 100 km on 2 litres of diesel . To achieve such economy, it
232-414: A carcinogen or "probable carcinogen" and is known to increase the risk of heart and respiratory diseases. In principle, a diesel engine does not require any sort of electrical system. However, most modern diesel engines are equipped with an electrical fuel pump, and an electronic engine control unit. However, there is no high-voltage electrical ignition system present in a diesel engine. This eliminates
348-601: A fuel economy of 0.9 L/100 km (310 mpg ‑imp ) under the NEDC cycle and produced emissions of 21 g/km of CO 2 . The XL1 was released to retail customers in Germany in June 2014. The prototype VW 1-litre concept car was shown to the public in April 2002 when Ferdinand Piëch , then chairman of the board of management, drove the concept between Wolfsburg and Hamburg as part of
464-497: A 650 km (404 mi) driving range on one tank of fuel. At the 2007 Frankfurt Motor Show senior VW exec Ferdinand Piëch claimed the car would be available by the end of the decade. Around June 2008 car magazines were reporting a powerplant change to a two-cylinder diesel-electric hybrid. Volkswagen only expected the car to be a limited production run, and prices were expected by one industry insider to be between €20,000 and €30,000. The second Volkswagen 1-litre car, named L1 ,
580-448: A diesel engine drops at lower loads, however, it does not drop quite as fast as the Otto (spark ignition) engine's. Diesel engines are combustion engines and, therefore, emit combustion products in their exhaust gas . Due to incomplete combustion, diesel engine exhaust gases include carbon monoxide , hydrocarbons , particulate matter , and nitrogen oxides pollutants. About 90 per cent of
696-605: A diesel engine, particularly at idling speeds, is sometimes called "diesel clatter". This noise is largely caused by the sudden ignition of the diesel fuel when injected into the combustion chamber, which causes a pressure wave that sounds like knocking. Frankfurt Motor Show The International Motor Show Germany or International Mobility Show Germany , in German known as the Internationale Automobil-Ausstellung ( IAA – International Automobile Exhibition),
812-516: A few degrees releasing the pressure and is controlled by a mechanical governor, consisting of weights rotating at engine speed constrained by springs and a lever. The injectors are held open by the fuel pressure. On high-speed engines the plunger pumps are together in one unit. The length of fuel lines from the pump to each injector is normally the same for each cylinder in order to obtain the same pressure delay. Direct injected diesel engines usually use orifice-type fuel injectors. Electronic control of
928-407: A finite area, and the net output of work during a cycle is positive. The fuel efficiency of diesel engines is better than most other types of combustion engines, due to their high compression ratio, high air–fuel equivalence ratio (λ) , and the lack of intake air restrictions (i.e. throttle valves). Theoretically, the highest possible efficiency for a diesel engine is 75%. However, in practice
1044-452: A fuel consumption of 519 g·kW ·h . However, despite proving the concept, the engine caused problems, and Diesel could not achieve any substantial progress. Therefore, Krupp considered rescinding the contract they had made with Diesel. Diesel was forced to improve the design of his engine and rushed to construct a third prototype engine. Between 8 November and 20 December 1895, the second prototype had successfully covered over 111 hours on
1160-409: A full set of valves, two-stroke diesel engines have simple intake ports, and exhaust ports (or exhaust valves). When the piston approaches bottom dead centre, both the intake and the exhaust ports are "open", which means that there is atmospheric pressure inside the cylinder. Therefore, some sort of pump is required to blow the air into the cylinder and the combustion gasses into the exhaust. This process
1276-566: A halt." In an impressive manner, the general public confirmed that this indeed was the right decision to take: more than 800,000 people visited this "quiet IAA". In spite of the Great Recession , the IAA Cars 2009 proved to be a magnet for visitors. Around 850,000 people visited the auto show in Frankfurt, which greatly exceeded the target of 750,000. The headline "A Moving Experience" showed, where
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#17328510343861392-423: A limited series of XL1s starting in 2013. The production version of the plug-in diesel-electric hybrid was unveiled at the 2013 Geneva Motor Show . As with the 2011 concept XL1, it is powered by an 800 cm two-cylinder diesel engine with 35 kW (47 hp) and a 20 kW (27 hp) electric motor. The combined power output is 51 kW (68 hp) and torque is 140 N⋅m (100 lb⋅ft ). Power
1508-403: A low-pressure loop at the bottom of the diagram. At 1 it is assumed that the exhaust and induction strokes have been completed, and the cylinder is again filled with air. The piston-cylinder system absorbs energy between 1 and 2 – this is the work needed to compress the air in the cylinder, and is provided by mechanical kinetic energy stored in the flywheel of the engine. Work output is done by
1624-532: A more efficient replacement for stationary steam engines . Since the 1910s, they have been used in submarines and ships. Use in locomotives , buses, trucks, heavy equipment , agricultural equipment and electricity generation plants followed later. In the 1930s, they slowly began to be used in some automobiles . Since the 1970s energy crisis , demand for higher fuel efficiency has resulted in most major automakers, at some point, offering diesel-powered models, even in very small cars. According to Konrad Reif (2012),
1740-678: A notable exception being the EMD 567 , 645 , and 710 engines, which are all two-stroke. The power output of medium-speed diesel engines can be as high as 21,870 kW, with the effective efficiency being around 47-48% (1982). Most larger medium-speed engines are started with compressed air direct on pistons, using an air distributor, as opposed to a pneumatic starting motor acting on the flywheel, which tends to be used for smaller engines. Medium-speed engines intended for marine applications are usually used to power ( ro-ro ) ferries, passenger ships or small freight ships. Using medium-speed engines reduces
1856-526: A petroleum engine with glow-tube ignition in the early 1890s; he claimed against his own better judgement that his glow-tube ignition engine worked the same way Diesel's engine did. His claims were unfounded and he lost a patent lawsuit against Diesel. Other engines, such as the Akroyd engine and the Brayton engine , also use an operating cycle that is different from the diesel engine cycle. Friedrich Sass says that
1972-415: A poorer power-to-mass ratio than an equivalent petrol engine. The lower engine speeds (RPM) of typical diesel engines results in a lower power output. Also, the mass of a diesel engine is typically higher, since the higher operating pressure inside the combustion chamber increases the internal forces, which requires stronger (and therefore heavier) parts to withstand these forces. The distinctive noise of
2088-408: A regular trunk-piston. Two-stroke engines have a limited rotational frequency and their charge exchange is more difficult, which means that they are usually bigger than four-stroke engines and used to directly power a ship's propeller. Four-stroke engines on ships are usually used to power an electric generator. An electric motor powers the propeller. Both types are usually very undersquare , meaning
2204-485: A seven-speed DSG transmission. The electric motor pitches in with 20 kW (27 hp) and 100 N⋅m (74 lb⋅ft) of torque, and can work in parallel with the diesel or drive the car independent of it. Fully charged, the XL1 can travel up to 35 km (22 mi) on electric power. The XL1 has a curb weight of 795 kg (1,753 lb), and a drag coefficient of C d =0.186 (a similar drag coefficient to
2320-435: A simple mechanical injection system since exact injection timing is not as critical. Most modern automotive engines are DI which have the benefits of greater efficiency and easier starting; however, IDI engines can still be found in the many ATV and small diesel applications. Indirect injected diesel engines use pintle-type fuel injectors. Early diesel engines injected fuel with the assistance of compressed air, which atomised
2436-533: A single orifice injector. The pre-chamber has the disadvantage of lowering efficiency due to increased heat loss to the engine's cooling system, restricting the combustion burn, thus reducing the efficiency by 5–10%. IDI engines are also more difficult to start and usually require the use of glow plugs. IDI engines may be cheaper to build but generally require a higher compression ratio than the DI counterpart. IDI also makes it easier to produce smooth, quieter running engines with
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#17328510343862552-527: A single speed for long periods. Two-stroke engines use a combustion cycle which is completed in two strokes instead of four strokes. Filling the cylinder with air and compressing it takes place in one stroke, and the power and exhaust strokes are combined. The compression in a two-stroke diesel engine is similar to the compression that takes place in a four-stroke diesel engine: As the piston passes through bottom centre and starts upward, compression commences, culminating in fuel injection and ignition. Instead of
2668-426: A small chamber called a swirl chamber, precombustion chamber, pre chamber or ante-chamber, which is connected to the cylinder by a narrow air passage. Generally the goal of the pre chamber is to create increased turbulence for better air / fuel mixing. This system also allows for a smoother, quieter running engine, and because fuel mixing is assisted by turbulence, injector pressures can be lower. Most IDI systems use
2784-516: A source of radio frequency emissions (which can interfere with navigation and communication equipment), which is why only diesel-powered vehicles are allowed in some parts of the American National Radio Quiet Zone . To control the torque output at any given time (i.e. when the driver of a car adjusts the accelerator pedal ), a governor adjusts the amount of fuel injected into the engine. Mechanical governors have been used in
2900-400: A spark plug ( compression ignition rather than spark ignition ). In the diesel engine, only air is initially introduced into the combustion chamber. The air is then compressed with a compression ratio typically between 15:1 and 23:1. This high compression causes the temperature of the air to rise. At about the top of the compression stroke, fuel is injected directly into the compressed air in
3016-417: A swirl chamber or pre-chamber are called indirect injection (IDI) engines. Most direct injection diesel engines have a combustion cup in the top of the piston where the fuel is sprayed. Many different methods of injection can be used. Usually, an engine with helix-controlled mechanic direct injection has either an inline or a distributor injection pump. For each engine cylinder, the corresponding plunger in
3132-422: A two-stroke ship diesel engine has a single-stage turbocharger with a turbine that has an axial inflow and a radial outflow. In general, there are three types of scavenging possible: Crossflow scavenging is incomplete and limits the stroke, yet some manufacturers used it. Reverse flow scavenging is a very simple way of scavenging, and it was popular amongst manufacturers until the early 1980s. Uniflow scavenging
3248-427: Is 0.159, compared to 0.30 - 0.40 for typical cars. The external dimensions of the car are 3.47 m (11.4 ft) long, 1.25 m (4.1 ft) wide and 1.10 m (3.6 ft) tall. There is 80 L (2.8 cu ft) of storage space. The car features an aircraft-style canopy , flat wheel covers and an underbelly cover to smooth the airflow. The engine cooling vents open only as needed. For light weight,
3364-516: Is 1.02 m (11.0 sq ft), giving a drag area (C d A) of 0.199 m (2.14 sq ft). It uses one half of a 1.6-litre TDI engine in a hybrid installation. The 800 cm, twin-cylinder, common-rail turbodiesel is joined by a 10 kW (13.4 hp) electric motor and has a CO 2 emission 39 g/km. The engine operates in two modes: "eco" mode, giving 20 kW (27 hp), and "sport" mode giving 29 kW (39 hp). The electric motor provides extra acceleration and can power
3480-461: Is a combustion engine that is more efficient than a diesel engine, but due to its mass and dimensions, is unsuitable for many vehicles, including watercraft and some aircraft . The world's largest diesel engines put in service are 14-cylinder, two-stroke marine diesel engines; they produce a peak power of almost 100 MW each. Diesel engines may be designed with either two-stroke or four-stroke combustion cycles . They were originally used as
3596-423: Is a simplified and idealised representation of the events involved in a diesel engine cycle, arranged to illustrate the similarity with a Carnot cycle . Starting at 1, the piston is at bottom dead centre and both valves are closed at the start of the compression stroke; the cylinder contains air at atmospheric pressure. Between 1 and 2 the air is compressed adiabatically – that is without heat transfer to or from
Volkswagen 1-litre car - Misplaced Pages Continue
3712-431: Is also avoided compared with non-direct-injection gasoline engines, as unburned fuel is not present during valve overlap, and therefore no fuel goes directly from the intake/injection to the exhaust. Low-speed diesel engines (as used in ships and other applications where overall engine weight is relatively unimportant) can reach effective efficiencies of up to 55%. The combined cycle gas turbine (Brayton and Rankine cycle)
3828-403: Is approximately 5 MW. Medium-speed engines are used in large electrical generators, railway diesel locomotives , ship propulsion and mechanical drive applications such as large compressors or pumps. Medium speed diesel engines operate on either diesel fuel or heavy fuel oil by direct injection in the same manner as low-speed engines. Usually, they are four-stroke engines with trunk pistons;
3944-429: Is called scavenging . The pressure required is approximately 10-30 kPa. Due to the lack of discrete exhaust and intake strokes, all two-stroke diesel engines use a scavenge blower or some form of compressor to charge the cylinders with air and assist in scavenging. Roots-type superchargers were used for ship engines until the mid-1950s, however since 1955 they have been widely replaced by turbochargers. Usually,
4060-492: Is controlled by manipulating the air-fuel ratio (λ) ; instead of throttling the intake air, the diesel engine relies on altering the amount of fuel that is injected, and thus the air-fuel ratio is usually high. The diesel engine has the highest thermal efficiency (see engine efficiency ) of any practical internal or external combustion engine due to its very high expansion ratio and inherent lean burn, which enables heat dissipation by excess air. A small efficiency loss
4176-440: Is delivered to the rear wheels through a seven-speed dual-clutch gearbox. The wheels are fitted with low rolling resistance tyres sized 115/80 R15 (front) and 145/55 R16 (rear). The drag coefficient has increased slightly from 0.186 to 0.189. The production version delivers an all-electric range of 50 km (31 mi), in addition to a 10-litre fuel tank which allows for over 400 km (250 mi) of real-life driving until
4292-404: Is done on the system to which the engine is connected. During this expansion phase the volume of the gas rises, and its temperature and pressure both fall. At 4 the exhaust valve opens, and the pressure falls abruptly to atmospheric (approximately). This is unresisted expansion and no useful work is done by it. Ideally the adiabatic expansion should continue, extending the line 3–4 to the right until
4408-413: Is inducted into the chamber during the intake stroke, and compressed during the compression stroke. This increases air temperature inside the cylinder so that atomised diesel fuel injected into the combustion chamber ignites. With the fuel being injected into the air just before combustion, the dispersion of fuel is uneven; this is called a heterogeneous air-fuel mixture. The torque a diesel engine produces
4524-464: Is more complicated to make but allows the highest fuel efficiency; since the early 1980s, manufacturers such as MAN and Sulzer have switched to this system. It is standard for modern marine two-stroke diesel engines. So-called dual-fuel diesel engines or gas diesel engines burn two different types of fuel simultaneously , for instance, a gaseous fuel and diesel engine fuel. The diesel engine fuel auto-ignites due to compression ignition, and then ignites
4640-401: Is no clutch pedal. The gear selection (forwards, reverse or neutral) is made using a switch on the right-hand side of the cockpit. The engine is switched off automatically during deceleration and stops, and auto-restarted when the acceleration pedal is pressed. According to Volkswagen, the vehicle consumes 0.99 L/100 km (238 mpg ‑US ; 285 mpg ‑imp ), giving it
4756-750: Is one of the world's largest mobility trade fairs . It consists of two separate fairs, that subdivided in 1991. While the IAA Mobility displays passenger vehicles, motorcycles and bikes, the IAA Transportation specializes in commercial vehicles. Before the separation, the show was held solely at the Messe Frankfurt. In 2021, the IAA adopted the New Mobility World concept, formats and business model, rebranded to IAA Mobility, and moved to Munich . The IAA
Volkswagen 1-litre car - Misplaced Pages Continue
4872-697: Is organized by the Verband der Automobilindustrie (VDA – Association of the German Automotive Industry) and is scheduled by the Organisation Internationale des Constructeurs d'Automobiles (OICA), who recognize the IAA as one of the "big five" most prestigious auto shows worldwide. In 1897 the first IAA was held at the Hotel Bristol in Berlin , with a total of eight motor vehicles on display. As
4988-553: The Beetle . This was the last IAA before it was again suspended during World War II . After World War II Germany and Berlin were divided. From 1947 to 1949, West Germany's automobile and accessories manufacturers took part in the export trade fair in Hanover . The automobile industry's hall acted like a magnet on the public, with a great number of visitors coming to the show. In 1951 the Verband der Automobilindustrie (VDA – Association of
5104-504: The EU average for diesel cars at the time accounted for half of newly registered cars. However, air pollution and overall emissions are more difficult to control in diesel engines compared to gasoline engines, and the use of diesel auto engines in the U.S. is now largely relegated to larger on-road and off-road vehicles . Though aviation has traditionally avoided using diesel engines, aircraft diesel engines have become increasingly available in
5220-531: The General Motors EV1 electric car ). Frontal area is 1.5 m giving a drag area of C d A =0.28 m. Just 23.2% of the car (184 kg (406 lb)) is made out of either steel or iron ; the drivetrain weighs 227 kg (500 lb). The XL1's length and width are similar to the Volkswagen Polo , with a length of 3,970 mm (156.3 in) and width of 1,682 mm (66.2 in). However,
5336-624: The IAA Passenger Cars was extremely well attended. In the following year the first IAA Commercial Vehicles took place in Hanover , Germany. It saw 1,284 exhibitors from 29 countries and gathered 287,000 people, 66 per cent being trade visitors. In 2001 the September 11 attacks on the World Trade Center in New York cast a shadow over the IAA Cars in Frankfurt. The exhibition went ahead all
5452-694: The United Kingdom , and the United States for "Method of and Apparatus for Converting Heat into Work". In 1894 and 1895, he filed patents and addenda in various countries for his engine; the first patents were issued in Spain (No. 16,654), France (No. 243,531) and Belgium (No. 113,139) in December 1894, and in Germany (No. 86,633) in 1895 and the United States (No. 608,845) in 1898. Diesel
5568-405: The 1957 show: The following introductions were made at the 1959 show: The following introductions were made at the 1961 show: The following introductions were made at the 1963 show: The following introductions were made at the 1965 show: The following introductions were made at the 1969 show: The following introductions were made at the 1973 show: The following introductions were made at
5684-461: The 1977 show: The 1979 Show occurred in a tough year for the automobile industry, with a focus on decreased speed limits and conserving energy, with most of Western Europe on the brink of a severe recession . It also occurred at a time when car design was changing substantially, with hatchbacks and front-wheel drive becoming increasingly popular, as well as demand increasing for smaller "supermini" cars. The following introductions were scheduled for
5800-610: The 1979 show: The following introductions were made at the 1981 show: 1983 was, in most of Western Europe, a year of recovery in the new car market, as the economy recovered from the recent recession. Many important new cars were launched at Frankfurt and elsewhere during 1983. Those launched elsewhere include the Austin Maestro , Fiat Uno , Nissan Micra , Peugeot 205 and Renault 11 . The Opel Corsa (launched in Spain in September 1982)
5916-411: The 1991 show: The following introductions were made at the 1993 show: The 1995 show ran from 14 to 24 September. The following introductions were made at the 1995 show: The 1997 show ran from 11 to 21 September. The following introductions were made at the 1997 show: The 1999 show opened on 16 September, and had nearly 1,200 exhibitors from 44 countries The following introductions were made at
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#17328510343866032-423: The 1999 show: The 2001 show opened to international media on 11 September, with a series of concept and production vehicle debuts kicking off in the early morning. The following introductions were made at the 2001 show: For the first time, the passenger car-only exhibition in Frankfurt broke the barrier of one million visitors. It featured 2,000 exhibitors from 42 countries. The following introductions were made at
6148-416: The 21st century. Since the late 1990s, for various reasons—including the diesel's inherent advantages over gasoline engines, but also for recent issues peculiar to aviation—development and production of diesel engines for aircraft has surged, with over 5,000 such engines delivered worldwide between 2002 and 2018, particularly for light airplanes and unmanned aerial vehicles . In 1878, Rudolf Diesel , who
6264-479: The 240 speakers and 47% attendees at the English-only conference coming from abroad. International media perceived New Mobility World to have "become the meeting point for the world's leading companies in automotive technologies and mobility" by now. The IAA itself recorded only 560,000 visitors (including NMW), the number of exhibitors fell to 873, in particular due to a further loss of international exhibitors. It
6380-432: The 250 units to be produced, 200 were to be sold to retail customers. Volkswagen opened a registration process for interested customers that closed on 18 October 2013. Because more than 200 potential buyers registered, a drawing was conducted to select the customers with a purchase option for the available cars. They were offered a purchase contract and after the payment of a €20,000 deposit, the purchase agreement for an XL1
6496-450: The Carnot cycle. Diesel was also introduced to a fire piston , a traditional fire starter using rapid adiabatic compression principles which Linde had acquired from Southeast Asia . After several years of working on his ideas, Diesel published them in 1893 in the essay Theory and Construction of a Rational Heat Motor . Diesel was heavily criticised for his essay, but only a few found
6612-598: The Electric Mobility Conference as well as the CarIT Conference dealing with the issue of connected driving. This approach was repeated in 2013. In 2015, the IAA introduced New Mobility World, a platform for the entire ecosystem of electric mobility, autonomous driving, connectivity and urban mobility. In the second week of the IAA, the emissions scandal (Dieselgate) became public. Until the IAA Cars 2015, exhibitor numbers were consistently above 1,000, and
6728-518: The German Automotive Industry) moved the IAA to Frankfurt and the federal State of Hesse purchased shares in the Messe Frankfurt . The trade fair was held in April and attracted a total of 570,000 visitors, with exhibits including the first HGV to have a turbo diesel engine. Just six months later, in September 1951, a second exhibition in Berlin was held, gathering 290,000 visitors. From then on,
6844-518: The German automobile industry bade farewell to its traditional exhibition site in Berlin and relocated the motor show completely to Frankfurt. The IAA was also rescheduled to only take place every other year. In 1989 the last IAA to feature both passenger cars and commercial vehicles in one show confirmed that the exhibition site in Frankfurt was now too small for this major event. Almost 2,000 exhibitors squeezed onto an exhibition site measuring 252,000 square metres. More than 1.2 million visitors attended
6960-511: The L1 on its own for short distances. Volkswagen claimed the L1 can achieve a top speed of 158 km/h (98 mph), with 0–100 km/h (0–62 mph) acceleration in 14.3 s . The XL1 is the third iteration of the Volkswagen 1-litre car, unveiled at the 2011 Qatar Motor Show . The diesel plug-in hybrid prototype is branded as a "Super Efficient Vehicle" (SEV). According to Volkswagen,
7076-433: The Volkswagen annual meeting of stockholders . For aerodynamics, the car seats two in tandem , rather than side-by-side. There are no rear view mirrors and it instead uses cameras and electronic displays. The rear wheels are close together to allow a streamlined body. The total aerodynamic drag is minimal because both the drag coefficient and frontal area are small (see drag equation ). The drag coefficient ( C d )
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#17328510343867192-407: The XL1 can achieve a combined fuel consumption of 0.9 litres per 100 kilometres (310 mpg ‑imp ; 260 mpg ‑US ) and CO 2 emissions of 24 g/km. Like the L1, the XL1 uses a two-cylinder turbo-diesel. Displacing 800 cm (49 cu in), it is rated at 35 kW (47 hp) and 121 N⋅m (89 lb⋅ft ) of torque and transmits power to the rear wheels through
7308-400: The amount of fuel injected into the engine. Due to the amount of air being constant (for a given RPM) while the amount of fuel varies, very high ("lean") air-fuel ratios are used in situations where minimal torque output is required. This differs from a petrol engine, where a throttle is used to also reduce the amount of intake air as part of regulating the engine's torque output. Controlling
7424-410: The automobile became more known and accepted, the IAA became a fixed event in Germany, with at least one held every year, usually in Berlin. From 1905 to 1907, there were two per year, as the production had increased to an industrial level. In the next years the show was suspended due to the ongoing World War I , and was then reinstated in 1921 with 67 automobile manufacturers displaying 90 vehicles under
7540-470: The bore is smaller than the stroke. Low-speed diesel engines (as used in ships and other applications where overall engine weight is relatively unimportant) often have an effective efficiency of up to 55%. Like medium-speed engines, low-speed engines are started with compressed air, and they use heavy oil as their primary fuel. Four-stroke engines use the combustion cycle described earlier. Most smaller diesels, for vehicular use, for instance, typically use
7656-492: The car is able to reliably achieve 2.3 L/100 km (100 mpg ‑US ; 120 mpg ‑imp ). Production began by mid 2013 and was limited to 250 units. A total of 50 units had been built by early September 2013, and the remaining 200 XL1s were scheduled to be built in the second quarter of 2014. Prices started at €111,000 . The XL1 was available in Europe only. Retail deliveries began in Germany in June 2014. Of
7772-547: The car is much lower with a height of only 1,184 mm (46.6 in), and has a coupe-like roofline, reducing interior volume. The design incorporates butterfly doors , with the interior seating layout using a staggered side-by-side arrangement similar to a Smart Fortwo , rather than the previous versions' tandem seating. Performance credentials include a governed top speed of 158 km/h (98.2 mph), with acceleration to 100 km/h (62.1 mph) in 11.9 seconds. In February 2012, Volkswagen confirmed that it would build
7888-602: The car needs to be refueled. In February 2013, Volkswagen announced that it expected the XL1 to achieve a fuel consumption of 0.9 L/100 km (260 mpg ‑US ; 310 mpg ‑imp ) and emissions of 21 g/km of CO 2 . The test cycle allows for a re-charge of the battery every 75 km (47 mi) which results in a high mpg value. Using diesel alone the car is capable of up to 2.0 L/100 km (120 mpg ‑US ; 140 mpg ‑imp ). One reviewer found that, in real-life traffic, with air conditioning on and without attempts at hypermiling ,
8004-426: The car uses an unpainted carbon fibre skin over a magnesium -alloy subframe. Individual components have been designed to be low weight, including engine, transmission, suspension, wheels (carbon fibre), brakes (aluminium), hubs (titanium), bearings (ceramic), interior, and so on. Empty vehicle weight is 290 kg (639 lb). The body and frame are designed with crush/ crumple zones and roll-over protection, and
8120-448: The combustion chamber, the droplets continue to vaporise from their surfaces and burn, getting smaller, until all the fuel in the droplets has been burnt. Combustion occurs at a substantially constant pressure during the initial part of the power stroke. The start of vaporisation causes a delay before ignition and the characteristic diesel knocking sound as the vapour reaches ignition temperature and causes an abrupt increase in pressure above
8236-418: The combustion chamber. This may be into a (typically toroidal ) void in the top of the piston or a pre-chamber depending upon the design of the engine. The fuel injector ensures that the fuel is broken down into small droplets, and that the fuel is distributed evenly. The heat of the compressed air vaporises fuel from the surface of the droplets. The vapour is then ignited by the heat from the compressed air in
8352-425: The compressed gas. Combustion and heating occur between 2 and 3. In this interval the pressure remains constant since the piston descends, and the volume increases; the temperature rises as a consequence of the energy of combustion. At 3 fuel injection and combustion are complete, and the cylinder contains gas at a higher temperature than at 2. Between 3 and 4 this hot gas expands, again approximately adiabatically. Work
8468-452: The compression ratio in a spark-ignition engine where fuel and air are mixed before entry to the cylinder is limited by the need to prevent pre-ignition , which would cause engine damage. Since only air is compressed in a diesel engine, and fuel is not introduced into the cylinder until shortly before top dead centre ( TDC ), premature detonation is not a problem and compression ratios are much higher. The pressure–volume diagram (pV) diagram
8584-473: The compression required for his cycle: By June 1893, Diesel had realised his original cycle would not work, and he adopted the constant pressure cycle. Diesel describes the cycle in his 1895 patent application. Notice that there is no longer a mention of compression temperatures exceeding the temperature of combustion. Now it is simply stated that the compression must be sufficient to trigger ignition. In 1892, Diesel received patents in Germany , Switzerland ,
8700-416: The concept of air-blast injection from George B. Brayton , albeit that Diesel substantially improved the system. On 17 February 1894, the redesigned engine ran for 88 revolutions – one minute; with this news, Maschinenfabrik Augsburg's stock rose by 30%, indicative of the tremendous anticipated demands for a more efficient engine. On 26 June 1895, the engine achieved an effective efficiency of 16.6% and had
8816-424: The cost of smaller ships and increases their transport capacity. In addition to that, a single ship can use two smaller engines instead of one big engine, which increases the ship's safety. Low-speed diesel engines are usually very large in size and mostly used to power ships . There are two different types of low-speed engines that are commonly used: Two-stroke engines with a crosshead, and four-stroke engines with
8932-550: The diesel engine is Diesel's "very own work" and that any "Diesel myth" is " falsification of history ". Diesel sought out firms and factories that would build his engine. With the help of Moritz Schröter and Max Gutermuth [ de ] , he succeeded in convincing both Krupp in Essen and the Maschinenfabrik Augsburg . Contracts were signed in April 1893, and in early summer 1893, Diesel's first prototype engine
9048-449: The diesel engine is called a compression-ignition engine (CI engine). This contrasts with engines using spark plug -ignition of the air-fuel mixture, such as a petrol engine ( gasoline engine) or a gas engine (using a gaseous fuel like natural gas or liquefied petroleum gas ). Diesel engines work by compressing only air, or air combined with residual combustion gases from the exhaust (known as exhaust gas recirculation , "EGR"). Air
9164-417: The efficiency is much lower, with efficiencies of up to 43% for passenger car engines, up to 45% for large truck and bus engines, and up to 55% for large two-stroke marine engines. The average efficiency over a motor vehicle driving cycle is lower than the diesel engine's peak efficiency (for example, a 37% average efficiency for an engine with a peak efficiency of 44%). That is because the fuel efficiency of
9280-408: The environment – by the rising piston. (This is only approximately true since there will be some heat exchange with the cylinder walls .) During this compression, the volume is reduced, the pressure and temperature both rise. At or slightly before 2 (TDC) fuel is injected and burns in the compressed hot air. Chemical energy is released and this constitutes an injection of thermal energy (heat) into
9396-545: The event. Because of the high demand, it was no longer possible to meet exhibitors' requirements for adequate exhibition stands. In view of this, the VDA decided to split the IAA from now on, with a focus on passenger vehicles in odd years, and a focus on commercial vehicles in even years. The first IAA focused solely on passenger cars, held in 1991, was a huge success. A total of 1,271 exhibitors from 43 countries displayed their new products and innovations. With more than 935,000 visitors,
9512-578: The final round: Cologne , Frankfurt, Hanover , and Stuttgart . On 3 March 2020, VDA chose Munich . Munich beat out Berlin and Hamburg based on three criteria. Munich Airport is the second Lufthansa hub and has many direct international flights (second to Frankfurt); Munich is home to BMW and several other high tech industries such as Apple, Google, and many start-up companies; the city has 130,000 employees working in automobile industry. The Greens -led city council and Bavarian state government have given their support, along with 2/3 of people who responded to
9628-400: The final year that the IAA hosted its automotive exhibition in Frankfurt. In the several previous years, more and more manufacturers opted out of the IAA or greatly downsized their presence. The marques that specialise in high performance and luxury vehicles — such as Aston Martin, Bentley, Bugatti, Ferrari, and Rolls-Royce — were often the biggest draw at the IAA show, and they were absent from
9744-463: The four-stroke cycle. This is due to several factors, such as the two-stroke design's narrow powerband which is not particularly suitable for automotive use and the necessity for complicated and expensive built-in lubrication systems and scavenging measures. The cost effectiveness (and proportion of added weight) of these technologies has less of an impact on larger, more expensive engines, while engines intended for shipping or stationary use can be run at
9860-612: The fuel and forced it into the engine through a nozzle (a similar principle to an aerosol spray). The nozzle opening was closed by a pin valve actuated by the camshaft . Although the engine was also required to drive an air compressor used for air-blast injection, the efficiency was nonetheless better than other combustion engines of the time. However the system was heavy and it was slow to react to changing torque demands, making it unsuitable for road vehicles. A unit injector system, also known as "Pumpe-Düse" ( pump-nozzle in German) combines
9976-697: The fuel injection transformed the direct injection engine by allowing much greater control over the combustion. Common rail (CR) direct injection systems do not have the fuel metering, pressure-raising and delivery functions in a single unit, as in the case of a Bosch distributor-type pump, for example. A high-pressure pump supplies the CR. The requirements of each cylinder injector are supplied from this common high pressure reservoir of fuel. An Electronic Diesel Control (EDC) controls both rail pressure and injections depending on engine operating conditions. The injectors of older CR systems have solenoid -driven plungers for lifting
10092-405: The fuel pump measures out the correct amount of fuel and determines the timing of each injection. These engines use injectors that are very precise spring-loaded valves that open and close at a specific fuel pressure. Separate high-pressure fuel lines connect the fuel pump with each cylinder. Fuel volume for each single combustion is controlled by a slanted groove in the plunger which rotates only
10208-461: The gaseous fuel. Such engines do not require any type of spark ignition and operate similar to regular diesel engines. The fuel is injected at high pressure into either the combustion chamber , "swirl chamber" or "pre-chamber," unlike petrol engines where the fuel is often added in the inlet manifold or carburetor . Engines where the fuel is injected into the main combustion chamber are called direct injection (DI) engines, while those which use
10324-419: The injection needle, whilst newer CR injectors use plungers driven by piezoelectric actuators that have less moving mass and therefore allow even more injections in a very short period of time. Early common rail system were controlled by mechanical means. The injection pressure of modern CR systems ranges from 140 MPa to 270 MPa. An indirect diesel injection system (IDI) engine delivers fuel into
10440-553: The injector and fuel pump into a single component, which is positioned above each cylinder. This eliminates the high-pressure fuel lines and achieves a more consistent injection. Under full load, the injection pressure can reach up to 220 MPa. Unit injectors are operated by a cam and the quantity of fuel injected is controlled either mechanically (by a rack or lever) or electronically. Due to increased performance requirements, unit injectors have been largely replaced by common rail injection systems. The average diesel engine has
10556-476: The mistake that he made; his rational heat motor was supposed to utilise a constant temperature cycle (with isothermal compression) that would require a much higher level of compression than that needed for compression ignition. Diesel's idea was to compress the air so tightly that the temperature of the air would exceed that of combustion. However, such an engine could never perform any usable work. In his 1892 US patent (granted in 1895) #542846, Diesel describes
10672-423: The mobility of tomorrow is heading. A huge number of options were presented at the IAA, ranging from the mild hybrid and the plug-in hybrid to the all-electric car, fuel cells and hydrogen power. The 2010s were marked by the transformation of the automotive industry : In 2011 the 63rd IAA featured the all-new "Hall of Electric Mobility", a first-timer to all Motor Shows worldwide. Additional IAA-premieres included
10788-442: The motto "comfort". Despite the still perceptible after-effects of the global recession, the 22nd IAA was held in Berlin in 1931, with a total of 295,000 visitors. For the first time the exhibition included front-wheel drive vehicles. In 1939, the 29th installation of the event gathered a total of 825,000 visitors – an all-time record at that time. The new Volkswagen was presented for the first time, which later came to be known as
10904-479: The number of visitors was 931,700. The 67th IAA Cars 2017 – the first after the emissions scandal – was overshadowed by a loss of confidence in the German automotive industry. For the first time, the number of exhibitors fell below 1,000, while the number of visitors dropped to 810,000 – the worst figure since 2001. Meanwhile, New Mobility World grew significantly to 250 participating organizations, 200 conference speakers and 250,000 visitors. Since 2017, NMW's purpose
11020-534: The past, however electronic governors are more common on modern engines. Mechanical governors are usually driven by the engine's accessory belt or a gear-drive system and use a combination of springs and weights to control fuel delivery relative to both load and speed. Electronically governed engines use an electronic control unit (ECU) or electronic control module (ECM) to control the fuel delivery. The ECM/ECU uses various sensors (such as engine speed signal, intake manifold pressure and fuel temperature) to determine
11136-477: The piston (not shown on the P-V indicator diagram). When combustion is complete the combustion gases expand as the piston descends further; the high pressure in the cylinder drives the piston downward, supplying power to the crankshaft. As well as the high level of compression allowing combustion to take place without a separate ignition system, a high compression ratio greatly increases the engine's efficiency. Increasing
11252-403: The piston-cylinder combination between 2 and 4. The difference between these two increments of work is the indicated work output per cycle, and is represented by the area enclosed by the pV loop. The adiabatic expansion is in a higher pressure range than that of the compression because the gas in the cylinder is hotter during expansion than during compression. It is for this reason that the loop has
11368-417: The pollutants can be removed from the exhaust gas using exhaust gas treatment technology. Road vehicle diesel engines have no sulfur dioxide emissions, because motor vehicle diesel fuel has been sulfur-free since 2003. Helmut Tschöke argues that particulate matter emitted from motor vehicles has negative impacts on human health. The particulate matter in diesel exhaust emissions is sometimes classified as
11484-408: The pressure falls to that of the surrounding air, but the loss of efficiency caused by this unresisted expansion is justified by the practical difficulties involved in recovering it (the engine would have to be much larger). After the opening of the exhaust valve, the exhaust stroke follows, but this (and the following induction stroke) are not shown on the diagram. If shown, they would be represented by
11600-484: The same. As a mark of solidarity with the victims and their dependants, all show elements and loud music as well as the official opening ceremony with the Federal Chancellor were cancelled. VDA President Gottschalk explained this decision: "Because we could not permit terrorist forces to take away our freedom of action. And because, as a key international sector, we have a responsibility not to allow things to grind to
11716-412: The several previous exhibitions. BMW had downsized its presence from 11,000 to 3,000 square metres. Since 2017, visitor numbers have almost halved, this, in addition to controversies such as Dieselgate and the global climate change issue, have prompted the IAA to change the scope of the exhibition and to pick a new venue. The rapidly decreasing number of visitors in the last several exhibitions reflected
11832-412: The survey. The event was planned to take place from 7 to 12 September, before the start of Oktoberfest , but was cancelled due to Covid. The IAA Mobility finally took place in September 2021. The following introductions were made at the 1951 show: The following introductions were made at the 1953 show: The following introductions were made at the 1955 show: The following introductions were made at
11948-476: The tandem seating means large side crush zones. Volkswagen claims protection comparable to a GT racing car. The car has anti-lock brakes , airbags with pressure sensors, and stability control . The engine is a one-cylinder 299 cm (18 cu in) diesel producing just 6.3 kW (8.4 hp). It drives through a six-speed transmission that combines stick-shift mechanics, weight, and drive efficiency with automatic convenience and efficiency controls. There
12064-539: The test bench. In the January 1896 report, this was considered a success. In February 1896, Diesel considered supercharging the third prototype. Imanuel Lauster , who was ordered to draw the third prototype " Motor 250/400 ", had finished the drawings by 30 April 1896. During summer that year the engine was built, it was completed on 6 October 1896. Tests were conducted until early 1897. First public tests began on 1 February 1897. Moritz Schröter 's test on 17 February 1897
12180-890: The timing of the start of injection of fuel into the cylinder is similar to controlling the ignition timing in a petrol engine. It is therefore a key factor in controlling the power output, fuel consumption and exhaust emissions. There are several different ways of categorising diesel engines, as outlined in the following sections. Günter Mau categorises diesel engines by their rotational speeds into three groups: High-speed engines are used to power trucks (lorries), buses , tractors , cars , yachts , compressors , pumps and small electrical generators . As of 2018, most high-speed engines have direct injection . Many modern engines, particularly in on-highway applications, have common rail direct injection . On bigger ships, high-speed diesel engines are often used for powering electric generators. The highest power output of high-speed diesel engines
12296-512: The waning enthusiasm for the IAA, along with prominent protests against the car industry by environmental activists. The contract between Messe Frankfurt and VDA , the IAA organiser, expired in 2019. VDA chose not to renew the contract, citing the above reasons. Instead, VDA indicated its intention of moving its biannual automotive exhibitions to another city for 2021 onward. The final three candidate cities were Berlin , Hamburg, and Munich . Four other cities had also submitted bids but didn't make
12412-524: Was a student at the "Polytechnikum" in Munich , attended the lectures of Carl von Linde . Linde explained that steam engines are capable of converting just 6–10% of the heat energy into work, but that the Carnot cycle allows conversion of much more of the heat energy into work by means of isothermal change in condition. According to Diesel, this ignited the idea of creating a highly efficient engine that could work on
12528-518: Was also accompanied by much larger protests than in the past. According to the organizers, a total of 25,000 participants, 18,000 of them by bicycle, came to a demonstration on 14 September for a change in traffic policy; the police spoke of about 15,000. The IAA Cars 2019 was the last IAA held in Frankfurt. In 2021, IAA adopted the New Mobility World concept, formats and business model, rebranded to IAA Mobility, and moved to Munich. 2019 marked
12644-543: Was also imported to the UK from April 1983, where it was sold as the Vauxhall Nova . The following introductions were made at the 1983 show from 12 to 22 September: The following introductions were made at the 1985 show: The following introductions were made at the 1987 show: The following introductions were made at the 1988 show: The following introductions were made at the 1989 show: The following introductions were made at
12760-488: Was attacked and criticised over several years. Critics claimed that Diesel never invented a new motor and that the invention of the diesel engine is fraud. Otto Köhler and Emil Capitaine [ de ] were two of the most prominent critics of Diesel's time. Köhler had published an essay in 1887, in which he describes an engine similar to the engine Diesel describes in his 1893 essay. Köhler figured that such an engine could not perform any work. Emil Capitaine had built
12876-503: Was binding. The Volkswagen XL1 was selected in February 2014 as one of the top five finalists for the 2014 World Car of the Year . Diesel engine The diesel engine , named after the German engineer Rudolf Diesel , is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression ; thus,
12992-472: Was built in Augsburg . On 10 August 1893, the first ignition took place, the fuel used was petrol. In winter 1893/1894, Diesel redesigned the existing engine, and by 18 January 1894, his mechanics had converted it into the second prototype. During January that year, an air-blast injection system was added to the engine's cylinder head and tested. Friedrich Sass argues that, it can be presumed that Diesel copied
13108-559: Was first shown to the public at the 2009 Frankfurt Motor Show . Limited production of the VW L1 was expected to start in 2013 but with the announcement of the XL1 in 2011 this was considered unlikely. The L1 continues the two-seater tandem concept first shown in the 2002 1-litre concept. It has a curb weight of 381 kg (840 lb), with a low coefficient of drag of 0.195. It is 3.813 m (12.5 ft) in length, 1.143 m (3.8 ft) tall and 1.2 m (3.9 ft) wide. Frontal area
13224-591: Was produced with lightweight materials, a streamlined body and an engine and transmission designed and tuned for economy. The concept car was modified first in 2009 as the L1 and again in 2011 as the XL1 . A limited production of 250 units began by mid 2013 and pricing started at €111,000 (~ £119,000 ). The Volkswagen XL1 plug-in diesel-electric hybrid was available only in Europe and its 5.5 kWh lithium-ion battery delivered an all-electric range of 50 km (31 mi), had
13340-424: Was the main test of Diesel's engine. The engine was rated 13.1 kW with a specific fuel consumption of 324 g·kW ·h , resulting in an effective efficiency of 26.2%. By 1898, Diesel had become a millionaire. The characteristics of a diesel engine are The diesel internal combustion engine differs from the gasoline powered Otto cycle by using highly compressed hot air to ignite the fuel rather than using
13456-414: Was to not only to be Europe's leading innovation platform for future mobility, but also to develop and establish formats and business models beyond the booth rental of conventional auto shows. This trend continued at the 58th IAA Cars 2019, with New Mobility World growing to over 400 participating organizations, doubling the number of attendees to 500,000, and increasing its international reach, with 62% of
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