Misplaced Pages

#912087

40-700: ST3 may refer to: Ducati ST3, a motorcycle model of the Ducati ST series made from 2004–07 Sound Transit 3 , a ballot measure during the November 2016 elections in Seattle, Washington ST3, a version of the Scream Tracker music-tracker software Star Trek III: The Search for Spock , a 1984 American science fiction film. See also [ edit ] STIII (disambiguation) [REDACTED] Topics referred to by

80-486: A common material being an organic compound resin with a copper wire facing or a ceramic material. In an automatic transmission , the role of the clutch is performed by a torque converter . However, the transmission itself often includes internal clutches, such as a lock-up clutch to prevent slippage of the torque converter, in order to reduce the energy loss through the transmission and therefore improve fuel economy. Older belt-driven engine cooling fans often use

120-517: A composite paper material. A centrifugal clutch automatically engages as the speed of the input shaft increases and disengages as the input shaft speed decreases. Applications include small motorcycles , motor scooters , chainsaws , and some older automobiles . A cone clutch is similar to dry friction plate clutch, except the friction material is applied to the outside of a conical shaped object. This conical shape allows wedging action to occur during engagement. A common application for cone clutches

160-482: A dashboard-controlled adjustable headlight, a new seat design, Euro-2 catalytic exhaust, and a simplified CAN-bus wiring setup. Dry weight was reduced by 11 kg (24 lb) due to the lighter wiring harness and simpler support structure for the nose of the bike. The ST series finished in 2008, the ST3 and ST3s models having only sold 1,011 total worldwide units in 2007. Following these poor sales, Ducati chose to refocus

200-413: A fixed fraction of a revolution per operation. Fast action friction clutches replaced dog clutches in some applications, eliminating the problem of impact loading on the dogs every time the clutch engaged. In addition to their use in heavy manufacturing equipment, single-revolution clutches were applied to numerous small machines. In tabulating machines , for example, pressing the operate key would trip

240-447: A heat-activated clutch, in the form of a bimetallic strip . When the temperature is low, the spring winds and closes the valve, which lets the fan spin at about 20% to 30% of the crankshaft speed. As the temperature of the spring rises, it unwinds and opens the valve, allowing fluid past the valve, making the fan spin at about 60% to 90% of crankshaft speed. A vehicle's air-conditioning compressor often uses magnetic clutches to engage

280-607: A heavier flywheel appropriate to its touring function. The suspension in fully adjustable for the early production series, with upside-down Showa forks at the front and Sachs rear shock, the same as the Ducati 916 Superbike but with softer damper ratings. The ST2 front brakes have twin 320mm floating Brembo discs and four-piston calipers, while the rear uses Brembo single 245mm disc with a twin-piston caliper. The OE tyres are Michelin Macadam or Metzeler 's MEZ4 sport radials in 120/70 ZR17 for

320-408: A lever mechanism. The majority of automotive clutches on manual transmissions are dry clutches. Slippage of a friction clutch (where the clutch is partially engaged but the shafts are rotating at different speeds) is sometimes required, such as when a motor vehicle accelerates from a standstill; however the slippage should be minimised to avoid increased wear rates. In a pull-type clutch, pressing

360-554: A much smoother powerband than the desmoquattro mill of the ST4 and simply runs better. The ST3 engine is user-friendly, offering ample power in any situation. We easily prefer this engine over the ST4, even if it doesn't have quite the top-end hit." In The Daily Telegraph , Kevin Ash called the ST3s a "sports bike for all seasons", adding "Ducati has added anti-lock brakes to the ST3 sports tourer, and

400-424: A single revolution clutch to process the most recently entered number. In typesetting machines , pressing any key selected a particular character and also engaged a single rotation clutch to cycle the mechanism to typeset that character. Similarly, in teleprinters , the receipt of each character tripped a single-revolution clutch to operate one cycle of the print mechanism. In 1928, Frederick G. Creed developed

440-421: A single-turn wrap spring clutch that was particularly well suited to the repetitive start-stop action required in teleprinters . In 1942, two employees of Pitney Bowes Postage Meter Company developed an improved single turn spring clutch. In these clutches, a coil spring is wrapped around the driven shaft and held in an expanded configuration by the trip lever. When tripped, the spring rapidly contracts around

SECTION 10

#1732851530913

480-401: Is a mechanical device that allows an output shaft to be disconnected from a rotating input shaft. The clutch's input shaft is typically attached to a motor , while the clutch's output shaft is connected to the mechanism that does the work . In a motor vehicle , the clutch acts as a mechanical linkage between the engine and transmission . By disengaging the clutch, the engine speed (RPM)

520-415: Is a tubular trellis frame , similar to the 916 frame in torsional rigidity and lightness. The Ducati ST2 has an engine derived from the 907 Ducati Paso , which had Ducati's signature 90° V-twin (or L-twin), SOHC , 2-valve desmodromic heads, Remus exhausts, 10.2:1 compression and Webber-Marelli electronic fuel injection with one injector and one spark plug per cylinder. It has an increased bore to 944cc and

560-465: Is different from Wikidata All article disambiguation pages All disambiguation pages Ducati ST series All five bikes in the ST series were outwardly similar, sharing the same frame, bodywork and cycle parts, but each model had a different engine, albeit that all were liquid-cooled desmodromic V-twins . The numeral after "ST" (2, 3 or 4) indicates the number of valves per cylinder. In

600-434: Is no longer determined by the speed of the driven wheels. Another example of clutch usage is in electric drills . The clutch's input shaft is driven by a motor and the output shaft is connected to the drill bit (via several intermediate components). The clutch allows the drill bit to either spin at the same speed as the motor (clutch engaged), spin at a lower speed than the motor (clutch slipping) or remain stationary while

640-411: Is the synchronizer ring in a manual transmission. A dog clutch is a non-slip design of clutch which is used in non-synchronous transmissions . The single-revolution clutch was developed in the 19th century to power machinery such as shears or presses where a single pull of the operating lever or (later) press of a button would trip the mechanism, engaging the clutch between the power source and

680-411: Is usually mounted directly to the face of the engine's flywheel , as this already provides a convenient large-diameter steel disk that can act as one driving plate of the clutch. Some racing clutches use small multi-plate disk packs that are not part of the flywheel. Both clutch and flywheel are enclosed in a conical bellhousing for the gearbox. The friction material used for the clutch disk varies, with

720-494: The Teletype Model 28 and its successors, using the same design principles. IBM Selectric typewriters also used them. These are typically disc-shaped assemblies mounted on the driven shaft. Inside the hollow disc-shaped drive drum are two or three freely floating pawls arranged so that when the clutch is tripped, the pawls spring outward much like the shoes in a drum brake . When engaged, the load torque on each pawl transfers to

760-462: The 996 Superbike, and retained a valve angle of 40°, but lost 4 mm of diameter on each of the intake throttle bodies (down from 54 mm on the 996). Chassis clearances also required the use of the more compact cylinder head design that was shared with the 748 Superbike and Monster S4 . In spite of the smaller intakes, the ST4s actually made slightly more power and torque than the 996 Superbike due to

800-643: The Ducati tradition, the frame was a tubular steel trellis item, and the conventional suspension comprised USD forks and a rear monoshock. In 2004, the ST series had a facelift, getting an updated nose, a new headlight, ABS and a weight reduction. This Ducati ST series first appeared in 1997 in Europe, with shipments to the United States in 1998. The first in the series, the ST2 , had a 944 cc Desmodue two-valve motor. The ST2

840-445: The ST3 motor could pass the emissions tests. In 2004 and 2005, Ducati added a wet clutch to many models, including the ST series in 2005. This reduced the force necessary to engage the clutch. Both "S" bikes, the ST4s and ST3s, could be equipped with ABS from 2003. In 2004, an upgrade to the ST line brought a modified nose fairing and dashboard, adjustable ergonomics, a trip computer, four-way (hazard) flashers, digital speedometer,

SECTION 20

#1732851530913

880-589: The brand onto sport bikes such as the Panigale . In its factory plan for 2008–2010 Ducati declared that the sport touring market was no longer part of their plans. The Ducati ST2 was made between 1997 and 2003. For touring, the ST2 had seating for two, and wind protection from its full fairing . As a sport touring motorcycle the ST2 has hard luggage , relaxed ergonomics compared with sport bikes , and powerful engine in comparison to typical touring motorcycles . The frame

920-455: The clutch. This can provide smoother engagement and a longer lifespan of the clutch, however wet clutches can have a lower efficiency due to some energy being transferred to the oil. Since the surfaces of a wet clutch can be slippery (as with a motorcycle clutch bathed in engine oil), stacking multiple clutch discs can compensate for the lower coefficient of friction and so eliminate slippage under power when fully engaged. Wet clutches often use

960-414: The compressor as required. Motorcycles typically employ a wet clutch with the clutch riding in the same oil as the transmission. These clutches are usually made up of a stack of alternating friction plates and steel plates. The friction plates have lugs on their outer diameters that lock them into a basket that is turned by the crankshaft. The steel plates have lugs on their inner diameters that lock them to

1000-475: The default state is for the transmission to be connected to the engine. A "neutral" gear position is provided, so that the clutch pedal can be released with the vehicle remaining stationary. The clutch is required for standing starts and in vehicles whose transmissions lack synchronising means, is used to assist in matching the speeds of the engine and transmission during gear changes to avoid gear “crashing,” which can cause serious damage to gear teeth. The clutch

1040-420: The front and 170/60 ZR17 for the rear, on Brembo rims. The Ducati ST4 was manufactured between 1999 and 2005, and used a retuned version of the Ducati 916 engine. The Ducati ST4s was based on the ST4, but had improved suspension and a larger engine, using the liquid-cooled Desmoquattro (four desmodromic valves ) 90° V-twin engine based on the Ducati 996 . The Desmoquattro was largely unchanged from

1080-442: The machine's crankshaft for exactly one revolution before disengaging the clutch. When the clutch is disengaged, the driven member is stationary. Early designs were typically dog clutches with a cam on the driven member used to disengage the dogs at the appropriate point. Greatly simplified single-revolution clutches were developed in the 20th century, requiring much smaller operating forces and in some variations, allowing for

1120-613: The mostly straight-through design of the ST's exhaust, compared to the under-seat exhaust of the Superbike. The Ducati ST3 was made between 2004 and 2007 and used the DesmoTre engine, an SOHC three-valve motor which could meet anti-pollution emissions limits. In 2005 power increased from 102bhp to 107bhp, and a wet clutch replaced the earlier dry clutch. A reviewer said of the ST3: "The three-valve (two intake and one exhaust) desmotre engine has

1160-421: The motor is spinning (clutch disengaged). A dry clutch uses dry friction to transfer power from the input shaft to the output shaft, for example a friction disk presses against a car engine's flywheel by a spring mechanism. The wheels of the vehicle only rotate when the flywheel is in contact with the friction disk. To stop the transfer of power, the friction disk is moved away from the flywheel by means of

1200-407: The others to keep them engaged. These clutches do not slip once locked up, and they engage very quickly, on the order of milliseconds. A trip projection extends out from the assembly. If the trip lever engaged this projection, the clutch was disengaged. When the trip lever releases this projection, internal springs and friction engage the clutch. The clutch then rotates one or more turns, stopping when

1240-402: The pedal pulls the release bearing to disengage the clutch. In a push-type clutch, pressing the pedal pushes the release bearing to disengage the clutch. A multi-plate clutch consists of several friction plates arranged concentrically. In some cases, it is used instead of a larger diameter clutch. Drag racing cars use multi-plate clutches to control the rate of power transfer to the wheels as

ST3 - Misplaced Pages Continue

1280-568: The power shaft engaging the clutch. At the end of one revolution, if the trip lever has been reset, it catches the end of the spring (or a pawl attached to it), and the angular momentum of the driven member releases the tension on the spring. These clutches have long operating lives—many have performed tens and perhaps hundreds of millions of cycles without the need of maintenance other than occasional lubrication. Cascaded-pawl single-revolution clutches superseded wrap-spring single-revolution clutches in page printers, such as teleprinters , including

1320-447: The result is impressive". The ST3 was succeeded by the ST3s , which gained the superior suspension components of the ST4s. The ST3s was, in essence, an upgraded ST3 with fully adjustable forks, Öhlins rear shock and ABS braking. Engine Transmission Chassis and suspension Wheels, brakes and tyres Wet clutch This is an accepted version of this page A clutch

1360-448: The same term This disambiguation page lists articles associated with the same title formed as a letter–number combination. If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=ST3&oldid=1048182029 " Category : Letter–number combination disambiguation pages Hidden categories: Short description

1400-414: The transmission input shaft. A set of coil springs or a diaphragm spring plate force the plates together when the clutch is engaged. On motorcycles the clutch is operated by a hand lever on the left handlebar. No pressure on the lever means that the clutch plates are engaged (driving), while pulling the lever back towards the rider disengages the clutch plates through cable or hydraulic actuation, allowing

1440-407: The trip lever again engages the trip projection. Most cars and trucks with a manual transmission use a dry clutch, which is operated by the driver using the left-most pedal. The motion of the pedal is transferred to the clutch using mechanical linkage, hydraulics (master and slave cylinders) or a cable. The clutch is only disengaged at times when the driver is pressing on the clutch pedal, therefore

1480-425: The vehicle accelerates from a standing start. Some clutch disks include springs designed to change the natural frequency of the clutch disc, in order to reduce NVH within the vehicle. Also, some clutches for manual transmission cars use a clutch delay valve to avoid abrupt engagements of the clutch. In a wet clutch , the friction material sits in an oil bath (or has flow-through oil) which cools and lubricates

1520-499: Was a replacement for the Paso , and represented a more focussed entry by Ducati into the burgeoning sport-touring market. In 1999 Ducati added to the range the ST4 model, which used the four-valve Desmoquattro motor derived from the Ducati 916 , but retuned for the ST bike. After the release of the 996 Desmoquattro superbike in 1999, Ducati began to phase out production of the 916 engine, which

1560-499: Was last used in the 2003 ST4. In late 2001, the ST4s model with the 996 Desmoquattro engine was added to the ST range. The ST4s benefited from suspension enhancements, and became available in 2002. In 2004, the ST2 and ST4 were deleted, both being replaced by the ST3 , with the new three-valve Desmotre engine of 992 cc displacement. The Desmotre required less maintenance than the ST4s, which

1600-467: Was notoriously expensive to maintain. Nevertheless, the ST4s remained as the top model in the range. In 2006, the ST4s production was discontinued in favour of an ST3s variant which inherited the enhanced ST4s suspension components, but which kept the ST3 Desmotre motor unchanged. Reasons given for the ST4s' demise were that the 996 engine would not pass the stringent Euro-3 emissions standard, whereas

#912087