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92-518: Six people, including three police officers were killed by a speeding BMW E38 in the Lodhi Colony area of Delhi , India , on 10 January 1999. After following trails of the engine oil, police found the BMW at 50 Golf Links, the residence of Rajeev Gupta. It was then revealed that Sanjeev Nanda, grandson of Indian Navy Chief and son of Indian arms dealer Suresh Nanda was driving the car after returning from

184-414: 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

276-576: A black 1996 750iL. Shakur succumbed to his injuries but the car itself later was bid at auction in Las Vegas, Nevada for $ 1,750,000. In the Russian and Eastern European cult classic "Бумер" (Bimmer) a 750i E38 BMW was used as the main vehicle in this road movie. Diesel engine The diesel engine , named after the German engineer Rudolf Diesel , is an internal combustion engine in which ignition of

368-448: 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

460-550: A double-walled steel tank behind the rear seat back. The hydrogen tank holds 140 litres and allows an additional range of 350 km (217 mi). In addition, the 750hL has a fuel cell rated at 5 kW (7 hp) at 42 volts. This is not used as a drive unit, but as an auxiliary power unit (APU) for power supply to the electrical system. During the Expo 2000 in Hanover, the vehicles were used as shuttles. From February to November 2001

552-556: A fax machine. Based on the 750iL with a 12-cylinder engine, the L7 has an electronically limited top speed of 250 km/h (155 mph). The L7 was only available in the Middle East, Southeast Asia and Europe, and 899 examples were built. The 2000-2001 models had an optional "privacy window" glass partition to separate the driver from the rear passengers. The armoured "Protection Line" vehicles were built from 2000 to 2001 and were based on

644-516: 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

736-407: 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

828-452: 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

920-409: 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

1012-562: A heterogeneous air-fuel mixture. The torque a diesel engine produces 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

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1104-610: A large fine, and sentenced Nanda to do community service for two years. The case inspired the Bollywood movie Jolly LLB (2013) starring Arshad Warsi and Boman Irani , the Tollywood movie Sapthagiri LLB (2017) starring Saptagiri and Sai Kumar , and the Kollywood movie Manithan . BMW E38 The E38 was the first car available with curtain airbags . It was also the first European car to offer satellite navigation and

1196-403: 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

1288-532: 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),

1380-678: 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

1472-465: A party with Siddhartha Gupta (son of Rajeev Gupta), and Manik Kapoor. While Nanda and several related parties were initially acquitted and released in a trial in 1999, he was later found guilty in 2008 and sentenced to two years in prison, which was reduced to time served, a large fine, and two years of community service by the Indian Supreme Court in 2012. The case attracted media attention, and

1564-526: 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

1656-415: 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

1748-408: 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

1840-546: A shorter differential ratio and higher stall speed for the torque converter . This allowed for a 0–97 km/h (60 mph) acceleration time of 5.9 seconds. The E38 was one of the first European cars to be available with satellite navigation , a system called CARIN jointly developed by BMW and Philips . The in-car entertainment (radio, audio system, satellite navigation, television and communications systems) are part of an automotive communication system called I-bus. A multi-function steering wheel included controls for

1932-435: 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

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2024-533: 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

2116-527: 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

2208-426: 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

2300-516: 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

2392-400: 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

2484-417: 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

2576-422: 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

2668-461: 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

2760-423: 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

2852-431: 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)

1999 Delhi hit-and-run case - Misplaced Pages Continue

2944-403: 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;

3036-429: 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,

3128-404: 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

3220-464: 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

3312-504: 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

3404-694: 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

3496-503: The fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression ; thus, 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

3588-446: The 1999 model year (produced from September 1998). The major changes are: In the 1997 James Bond film Tomorrow Never Dies , the sixteen E38 cars used during production were modified so they could be driven from the backseat, making it appear that Bond actor Pierce Brosnan was controlling the car using his mobile phone. The car type is actually a BMW 740iL but they were re-badged as the 750iL. One survives today and can be seen at

3680-416: 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

3772-694: The 730i and 740i. US-specification cars entered production in September 1994, for November 1994 launch. On 18 February 1994, the E38 BMW 7 Series was unveiled for the 1995 model year via a BMW press release. The 750i production began in November 1994, in advance of its January 1995 launch. The production totals by model are: 728i- 38,000; 728iL- 7,000; 730i- 21,000; 730iL- 2,000; 735i- 21,000; 735iL- 5,000; 740i- 88,000; 740iL- 81,000; 750i- 8,000; 750iL- 15,000; 725tds- 9,000; 730d- 12,000, 740d- 3,000 and less than 500 each for

1999 Delhi hit-and-run case - Misplaced Pages Continue

3864-405: The 740iL P, 750iL P, 750iL S and L7 models. A total of 340,242 cars were produced. The last E38 rolled off BMW's assembly line on 27 July 2001 to make way for the replacement E65 7 Series . A 5-speed ZF 5HP automatic transmission was available on all models. In many markets, a 5-speed manual transmission was available for the 725tds, 728i, 730i, and 735i, while a 6-speed manual

3956-503: The 740iL and 750iL models. Security features include body armor, bullet-resistant glass, and run-flat tyres. An intercom system is provided to communicate with people outside the vehicle while the windows and doors are shut. A High-Security version with protection up to B6/7 was also available in Europe, known internally as the 750iL S. The additional security measures brought an additional weight of 950 kg (2,094 lb) compared to

4048-450: 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

4140-400: 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

4232-435: The audio, phone, cruise control and air recirculation. From 1997 to 2001, BMW marketed an extended wheelbase limousine model called the L7. The wheelbase was extended by 250 mm (9.8 in) over the "iL" models, resulting in an overall length of 5.37 m (211.4 in). Features included electrically adjustable rear seats, rear footrests, fold down rear trays, a fridge, rear television screen, video player and

4324-470: 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

4416-460: The car to attain a top speed of 226 km/h (140 mph). The production of the hydrogen engine was integrated into the regular engine production at the Dingolfing plant. It differs from the conventional petrol engine essentially only in regards to the intake tract with additional injection valves for hydrogen. The hydrogen is stored cryogenically at a temperature of minus 253 degrees Celsius in

4508-459: The car, and according to the prosecution, at this point a co-passenger said: "Let's go," and they quickly drove away. The car was then driven to a house in Golf Links, New Delhi , where a watchman and driver were instructed to clean the bumpers and bonnet of the car. Subsequently, the police charged these three with destroying evidence. A few days later, a witness came forward to describe the scene. At

4600-415: The car, though it is also possible that the car was going so fast that it was out of control. Sanjeev's BMW crashed through all the people at the police checkpoint, immediately killing two constables and two others. Another policeman and another bystander died later in hospital. The seventh victim survived. After running through the policemen, he allegedly stopped the car to check the damage, saw people under

4692-448: 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

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4784-418: 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

4876-425: 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

4968-452: 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

5060-473: 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 ,

5152-416: 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

5244-424: 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

5336-598: 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

5428-417: 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

5520-653: The engine bay or the vicinity of the fuel tank. A breathing air system is also available which delivers air from a cylinder in the trunk, up to three firearms cases designed to fit a Heckler & Koch MP5K were also optionally available as well as spherical gunports in the doors. On 11 May 2000, BMW presented a fleet of fifteen 750hL models in Berlin. Its twelve-cylinder hydrogen combustion engine can be operated on both hydrogen and petrol. In operation on hydrogen, it delivers 150 kW (201 hp), accelerating from 0 to 100 km/h (62 mph) in 9.6 seconds and slowing

5612-408: 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

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5704-406: The exhaust (known as exhaust gas recirculation , "EGR"). Air 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

5796-625: The exhibition “TOP SECRET” at Museum Industriekultur, Nuremberg. Besides the E38 saloons, BMW also supplied a $ 14,000 R1200C motorcycle . BMW received the rights to use movie clips from the film in its multimillion-dollar campaign, and during the 1997 holiday season they offered a special promotion that included the R1200C with the purchase of the 750iL. 2002’s The Transporter starred the 1995 E38 735i as co-star to Jason Statham. Rapper Tupac Shakur and Death Row Records CEO Suge Knight were gunned down in

5888-533: The first BMW to offer an in-built television. The E38 was the first 7 Series to be available with a diesel engine and the last to be available with a manual transmission . In 2001, the E38 was replaced by the E65 7 Series . In early 1988, development began on the third generation of the 7 Series. From 1988 to 1990 styling work was done initially under design director Claus Luthe (through April 1990, taken over by Dr. Wolfgang Reitzle ), when Boyke Boyer's concept design

5980-463: 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

6072-612: 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

6164-697: 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

6256-405: 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

6348-461: 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

6440-419: 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

6532-553: 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

6624-476: 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

6716-404: The normal 750iL. Features include explosive cord around the windshield allowing removal of the windshield facilitating escape and hydraulically actuated windows. A gas sensor can detect irritants like CS gas and respond by turning the blower motor off, closing fresh air flaps and all windows. A fire suppression system is triggered by either a button or the detection of extreme temperatures in

6808-463: The others who helped clean the car, were never found. Nanda and his friends were charged with culpable homicide in court. The case went up for re-trial and was tried on a fast-track basis. On 2 September 2008, Nanda was convicted by a Delhi court for killing six people. On 3 August 2012 the Supreme Court reduced his prison sentence to the two years he had already spent in prison, but the court added

6900-534: 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

6992-477: 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

7084-403: 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

7176-417: 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

7268-408: 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

7360-539: 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

7452-490: The time of the crash, he was on his way to the railway station. Defence lawyers were caught on camera offering money to a witness in an NDTV sting operation , and as a result, the Delhi High Court barred them from practice for four months. The vehicle's broken registration plate was found on the scene the next morning. Preliminary investigations revealed that the car would have been going at 140 km/h when it hit

7544-890: 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

7636-594: The vehicles were part of the "CleanEnergy WorldTour 2001" in the cities of Dubai, Brussels, Milan, Tokyo, Los Angeles, and Berlin. By November 2001 the 750hL had achieved a mileage of over 150,000 km. On the Nürburgring the 750hL recorded a time of 9 minutes and 53 seconds while powered by hydrogen. The Alpina B12 5.7 and Alpina B12 6.0 models were based on the BMW 750i and 750iL respectively. The E38 facelift (also known as Life-Cycle Impulse) models were introduced in

7728-571: The victims. Within a few hours of the incident, Inspector Jagdish Pandey of the Police Control Room of Delhi Police traced the car by trailing the oil leak to the grade from the spot of the accident. They found the one-month-old car, purchased in his sister Sonali Nanda's name, with foreign number plates, which had not been registered in India. Attempts to clean it were still in progress. Nanda and his friends were arrested, but his clothes, and those of

7820-524: 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

7912-575: Was also available, which is known to delaminate. The delamination occurred with the Protection S357A option only, not with normal S352A dual pane windows. Bullet-resistant glass was used for the Protection model, with even thicker glass used for the Security model. The Sport Package included a revised steering wheel, suspension, exterior trim, and interior wood trim. Some sports models also included

8004-488: 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

8096-472: 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

8188-668: Was chosen and further refined into production form. In February 1991, the final production design for the new 7 Series was approved by the board 36 months ahead of the scheduled start of production for 17 February 1994. On 27 April 1993, German design patents were filed featuring a pre-production prototype as a design representation. Patents were later filed on 27 October 1993 in the United States. Production started on 23 July 1993 on pilot production models and US specification variants on 13 January 1994, with series production commencing in April 1994 for June 1994 domestic German launch with

8280-906: Was on offer for the 740i. Safety features include ASC+T traction control, Dynamic Stability Control (DSC), headlight washers and auto-leveling low beam xenon HID headlamps . Side tubular airbags (called "Head Protection System") were fitted as standard equipment. "Active Comfort Seats" were introduced in 1998, to improve comfort and reduce fatigue for the driver and front passenger. This system uses two fluid-filled bladders which alternate in height. Other equipment includes Electronic Damper Control (called EDC III), Park Distance Control (PDC), auto-dimming & power folding mirrors, power moonroof, power rear sunblind, rain-sensing wipers, dual-zone or tri-zone climate control , electric driver's seat adjustment and electric steering wheel adjustment. Double glazed windows were available (called "dual pane glass"). Break resistant laminated "security glass"

8372-424: 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

8464-475: Was viewed by India Today as "a test of the judicial system's ability to take on the powerful". In the early morning of 10 January 1999, Sanjeev Nanda was returning from a late night party in Gurgaon with some friends. Nanda had reportedly been instructed by his parents not to drive that night, but was driving anyway. There was a police checkpoint on Lodhi Road and it appears that the constable may have challenged

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