Dual Clutch Transmission Essay

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This type of transmittal was invented by Frenchman Adolphe Kegresse merely earlier World War II but he ne’er developed a on the job theoretical account. The first development of the Twin Clutch or Dual-clutch transmittal started in the early portion of 1980 under the counsel of Harry Webster at Automotive Products ( AP ) . Leamington Spa with paradigms built into the Ford Fiesta Mk1. Ford Ranger & A ; Peugeot 205. Initially. the control systems were based on strictly analogue/discrete digital circuitry with patents filed in July 1981. [ 4 ] All of these early AP Twin Clutch installings featured a individual dry clasp & A ; multi-plate moisture clasp. Following treatments with VW/Porsche. DCT work continued from Porsche in-house development. for Audi and Porsche rushing autos subsequently in the 1980s. [ 2 ] when computing machines to command the transmittal became compact plenty: the Porsche Doppelkupplungsgetriebe ( English: dual-clutch gear box ) ( PDK ) [ 2 ] used in the Porsche 956 [ 2 ] and 962 [ 2 ] Le Mans race autos from 1983. [ 2 ] and the Audi Sport Quattro S1 mass meeting auto. [ 5 ] [ 6 ] A dual-clutch transmittal eliminates the torsion convertor as used in conventional epicyclic-geared automatic transmittals. [ 1 ] Alternatively. dual-clutch transmittals that are presently on the market chiefly utilize two oil-bathed wet multi-plate clasps. similar to the clasps used in most bikes. though dry clasp versions are besides available. [ 7 ] The first series production route auto to be fitted with a DCT was the 2003 Volkswagen Golf Mk4 R32. [ 2 ] [ 8 ] [ 9 ] As of 2009. the largest figure of gross revenues of DCTs in Western Europe are by assorted trade names of the German Volkswagen Group. [ 10 ] though this is anticipated to decrease as other transmittal shapers and vehicle makers make DCTs available in series production
cars. [ 2 ] [ 11 ] In 2010. on BMW Canada鈥檚 web site for the 3 Series Coupe. it is described both as a 7-speed double-clutch transmittal and as a 7-speed automatic transmittal. It is really a dual-clutch semi-automatic. [ 12 ] [ 13 ] Overview [ edit beginning | editbeta ]

In DCTs where the two clasps are arranged concentrically. the larger outer clasp drives the uneven numbered cogwheels. [ 1 ] [ 2 ] [ 8 ] while the smaller interior clasp drives the even numbered cogwheels. [ 1 ] [ 2 ] [ 8 ] Shifts can be accomplished without disrupting torque distribution to the goaded roadwheels. [ 1 ] [ 2 ] [ 3 ] [ 5 ] [ 8 ] by using the engine鈥檚 torsion to one clasp at the same clip as it is being disconnected from the other clasp. [ 2 ] [ 5 ] Since surrogate gear ratios can pre-select [ 1 ] [ 2 ] [ 3 ] [ 5 ] an uneven cogwheel on one cogwheel shaft while the vehicle is being driven in an even cogwheel. [ 3 ] ( and frailty versa ) . DCTs are able to switch more rapidly than autos equipped with single-clutch automated-manual transmittals ( AMTs ) . a. k. a. single-clutch semi-automatics. Besides. with a DCT. displacements can be made more smoothly than with a single-clutch AMT. doing a DCT more suited for conventional route autos. [ 14 ] [ non in commendation given ] Clutch types [ edit beginning | editbeta ]

There are two cardinal types of clasps utilised in dual-clutch transmittals: either two wet multi-plate clasps which are bathed in oil ( for chilling ) . or two dry single-plate clasps. [ 9 ] The wet clasp design is by and large used for higher torsion engines which can bring forth 350 Newton meters ( 258 lbf路ft ) and more ( the moisture multi-plate clasp DCT in the Bugatti Veyron is designed to get by with 1. 250 N路m ( 922 lbf路ft ) [ 2 ] ) . whereas the dry clasp design is by and large suited for smaller vehicles with lower torsion outputs up to 250 N路m ( 184 lbf路ft ) . [ 2 ] [ 7 ] However. while the dry clasp discrepancies may be limited in torsion compared to their wet clasp opposite numbers. the dry clasp discrepancies offer an addition in fuel efficiency. [ 2 ] due to the deficiency of pumping losingss of the transmittal fluid in the clasp lodging. [ 2 ] Clutch installing [ edit beginning | editbeta ]

There are now three fluctuations of clasp installing. The original design used a homocentric agreement. where both clasps shared the same plane when viewed sheer from the transmittal input shaft. along the
same Centre line as the engine crankshaft ; when viewed head-on along the length of the input shaft. this makes one clasp perceptibly larger than the other. The 2nd execution utilised two single-plate dry clasps which are side-by-side from the perpendicular position. but once more sharing the centre line of the crankshaft. A latest fluctuation uses two separate but indistinguishable sized clasps ; these are arranged side-by-side when viewed head-on ( along the length of the input shaft and crankshaft centre line ) . and besides portion the same plane when viewed sheer. This latter clasp agreement ( unlike the other two fluctuations ) is driven via a cogwheel from the engine crankshaft. Suppliers [ edit beginning | editbeta ]

BorgWarner [ edit beginning | editbeta ]
BorgWarner Inc. supplies [ 11 ] wet double clasps [ 2 ] and electro-hydraulic control faculties ( mechatronics ) [ 1 ] [ 11 ] for these dual-clutch transmittals. along with complete dual-clutch transmittal and transaxle assemblies. BorgWarner. who call their engineering 鈥淒ualTronic鈥 . [ 1 ] [ 11 ] [ 15 ] entered series production ( excludes Bugatti Veyron ) for Volkswagen Group. [ 5 ] [ 11 ] who renamed Direct-Shift Gearbox ( DSG ) in 2003 in the Volkswagen Golf Mk4 R32. [ 8 ] [ 9 ] [ 15 ] The company signed farther understandings with three other ( nameless ) European automotive makers to integrate their constituents in DCTs. [ 16 ] On 14 January 2009. BorgWarner announced the constitution of a joint venture with the China Automobile Development United Investment Co. . Ltd. ( CDUI ) which is owned by 12 Chinese car manufacturers. This joint venture is known as the BorgWarner United Transmission Systems Co. . Ltd. . and is located in Dalian. China. The company has produced assorted dual-clutch transmittal faculties get downing in 2011. [ 17 ] The Nissan GT-R uses BorgWarner constituents which include the dual-clutch faculty. clutch-control and shift-actuation systems and synchronizer assemblies. [ 18 ] Fiat Powertrain Technologies [ edit beginning | editbeta ]

Fiat Powertrain Technologies developed a dual-clutch transmittal with Magneti Marelli and BorgWarner called Euro Twin Clutch Transmission. Magneti Marelli produces the control system which integrates BorgWarner鈥檚 hydraulic propulsion faculty into its ain power and transmittal control units. [ 19 ] It can manage torque inputs of up to 350 N路m ( 260 lb路ft ) . doing it the
highest-torque dry clasp application [ commendation needed ] . Its weight of 81 kilograms ( 179 pound ) . including oil and transmittal control unit. its three-shaft architecture. particularly axially. allows it to be installed in a several types of B- and C-segment vehicles. [ 20 ] FEV GmbH [ edit beginning | editbeta ]

FEV [ disambiguation needed ] developed a DCT with an integrated Electric Motor. supplying intercrossed capableness. The 7H AMT Transmission provides 7 forward velocities with multiple use of cogwheels ( the electric thrust can utilize fresh cogwheels from the burning engine way ) : this aims to well cut down the complexness of the unit every bit good as the bundle size and weight. Another by-product from this design was the FEV xDCT that provides 10 forward velocities but with the mechanical complexness of a standard 6 velocity DCT. [ 21 ] Getrag [ edit beginning | editbeta ]

Getrag has developed a scope of DCT [ 22 ] transaxles. including 7DCL750. a seven-speed transaxle for mid-engine longitudinal applications. capable of taking more than 750 N路m ( 553 lbf路ft ) . [ 23 ] Getrag will be supplying its DCT in its first commercial applications. for the Dodge Journey and Volvo S40 and V50. from mid-2008. [ 24 ] Getrag has developed the 6DCT250 dry clasp DCT for usage in front wheel drive transverse applications. With usage of electro-mechanical propulsion. instead than electro-hydraulic. the 6DCT250 transmittal surpasses the conventional manual transmittal in fuel ingestion and CO2 emanation. [ 25 ] In the second one-fourth of 2008. Getrag had signed an understanding with Chrysler to provide its PowerShift DCTs for usage in American markets. [ 5 ] However. due to the planetary economic downswing. this was later cancelled. [ 5 ] [ 26 ] [ 27 ] In 2006 Getrag was besides working with Bosch to develop a DCT for usage in intercrossed vehicles. [ 5 ] [ 28 ] Getrag dual-clutch transmittals are used in the BMW M3. [ 29 ] BMW 335is. BMW Z4 Sdrive35i. [ 30 ] Ferrari California. [ 31 ] Ferrari 458 Italia. [ 32 ] Mercedes-Benz SLS AMG. [ 33 ] Mitsubishi Lancer Evolution X. Mitsubishi Lancer Ralliart. Ford Fiesta. Ford Focus. Renault Megane. Renault Scenic. Volvo V40. Volvo V60 and Volvo V70 vehicles. [ 34 ] Graziano [ edit beginning | editbeta ]

Italian specializer Graziano Transmissions was in the procedure of developing a moisture clasp DCT for original equipment maker ( OEM ) fitment into
supercars. [ 35 ] It aimed to be in production by 2010. [ 35 ] Their DCT is taking to hold a torsion managing capacity of 750 N路m ( 553 lbf路ft ) . [ 35 ] and they are besides taking to better displacement quality over their current automated manual transmittals ( AMTs ) . [ 35 ] As of 2011. they supplied the 7-speed DCT for McLaren鈥檚 MP4-12C supercar. [ 36 ] LuK [ edit beginning | editbeta ]

LuK Clutch Systems. LLC. designed and fabricate the double dry individual home base clasp system for the Volkswagen Group seven-speed DQ200 Direct-Shift Gearbox ( DSG ) introduced in 2008. [ 37 ] This DSG discrepancy is used in smaller autos. with smaller supplanting engines with comparatively low torsion end products. [ 37 ] LuK are calling their engineering 鈥淴SG鈥 for their overview of machine-controlled displacement gear box systems. [ 38 ] and 鈥淧arallel Shift Gearbox鈥 ( PSG ) for its ain proprietary DCT. [ 39 ] Ricardo [ edit beginning | editbeta ]

English specializer confer withing technology company Ricardo plc designed and built the Bugatti Veyron鈥檚 seven-speed double wet multi-plate dual-clutch transmittal. specifically to get by with the 1. 250 N路m ( 922 lbf路ft ) of torsion generated by W16 engine. [ 1 ] [ 2 ] [ 5 ] [ 40 ] ZF [ edit beginning | editbeta ]

ZF Friedrichshafen AG designed and construct with Porsche the two different discrepancies [ 41 ] of the Porsche Doppel-Kupplunggetriebe ( PDK ) seven-speed 鈥7DT鈥 double moisture multi-plate clasp transmittal. [ 41 ] [ 42 ] [ 43 ] [ 44 ] [ 45 ] Applications [ edit beginning | editbeta ]

BMW [ edit beginning | editbeta ]
In January 2008. BMW introduced a dual-clutch transmittal for their M3 theoretical account. manufactured by GETRAG. implanting a DualTronic dual-clutch faculty from BorgWarner. and dubbed 鈥淢 double-clutch transmission鈥 ( M DCT ) . The same transmittal is used in the 2nd coevals Z4 ( the Sdrive35i version ) . and is an available option on the 335is and subsequently 135i physiques. [ 46 ] BYD [ edit beginning | editbeta ]

BYD Auto introduces a dual-clutch transimission for its mid-size household saloon BYD G6. [ 47 ] Chrysler [ edit beginning | editbeta ]
Chief article: Euro Twin Clutch Transmission
Chrysler is scheduled to have Fiat Powertrain Technologies C635 double dry-clutch transmittal for usage on Chrysler鈥檚 inline-4 and V6 Pentastar in the Dodge Dart and a D-segment auto in 2013. [ 48 ] Fiat Group [ edit beginning | editbeta ]

Chief article: Euro Twin Clutch Transmission
Ferrari incorporated a Getrag designed and manufactured seven-speed double moisture clasp transmittal in their California and 458 Italia sportscars. [ 49 ] [ 50 ] Fiat Powertrain Technologies ( FPT ) started production of 鈥淭CT鈥 [ 51 ] Dual Dry Clutch Transmission ( DDCT ) in early 2010 at the Verrone works. [ 52 ] The C635 DDCT gear box is used for B ( supermini ) . C ( compact auto ) . and D section ( big household auto ) autos. and can manage torque up to 350 N路m ( 258 lbf路ft ) . [ 52 ] Fiat鈥檚 C635 DDCT gear box was introduced in Alfa Romeo MiTo in 2011. Ford Motor Company [ edit beginning | editbeta ]

Chief article: Ford PowerShift transmittal
Ford Motor Company has released a wet clasp 鈥淧owerShift鈥 [ 2 ] [ 5 ] transmittal on the 2008 Ford Focus ( international ) [ 5 ] [ 53 ] and Ford C-MAX. This wet clasp [ 5 ] DCT was designed with gearbox specializer Getrag [ 5 ] under the GETRAG FORD Transmissions joint venture. founded in 2001. [ 54 ] [ 55 ] and is expected to have in other Ford and Volvo [ 53 ] theoretical accounts. Ford has announced the US-market version of the Mark VI Ford Fiesta coming in 2011 will have a dry clasp [ 5 ] PowerShift transmittal. Ford besides announced the debut of PowerShift transmittal to North American market by 2010. [ 2 ] [ 56 ] The Volvo version will be built in Koping. Sweden at Volvo鈥檚 transmittal works. The PowerShift gear box will be introduced on the 2nd coevals Volvo S60. [ 56 ] and so on to the V50 [ 53 ] and C30 [ 53 ] theoretical accounts. The XC60 is expected to acquire this Ford PowerShift gear box along with other new theoretical accounts to do more clean autos. General Motors [ edit beginning | editbeta ]

In the company鈥檚 restructuring program. it revealed that dry dual-clutch transmittal would be available in 2012 calendar twelvemonth. [ 57 ] The GM鈥檚 dual-clutch gear box will be introduced on the GMC Granite. [ 58 ] The new front-wheel thrust transmittal will integrate the latest inventions for bettering fuel economic system and public presentation. The transmittal entirely will supply
upward of 10 per centum betterment in fuel economic system over today鈥檚 conventional six-speed automatic transmittals. The co-developed transmittal between GM and SAIC will have dry. dual-clutch engineering. It will supply switch comfort equal to a conventional to the full automatic transmittal. with superior quality. while cut downing CO2 emanations. [ 59 ] Honda [ edit beginning | editbeta ]

In October 2009. Honda launched the VFR1200F. [ 60 ] a bike with a 1. 237 milliliter ( 75. 5 copper in ) V4 engine and optional DCT dubbed the Following Generation Transmission. [ 61 ] In May 2009. Honda CEO Takeo Fukui mentioned that Honda was working on a new dual-clutch transmittal system that could be matched with future loanblends. [ 62 ] Hyundai [ edit beginning | editbeta ]

At the 2009 Geneva Motor Show. Hyundai unveiled ix-onic construct auto. which was said to have a six-speed dual-clutch transmittal. [ 63 ] Hyundai released the Veloster with the 6-speed EcoShift Dual Clutch Transmission in 2011. The double clasp transmittal is non available with the turbocharged engine. Lotus [ edit beginning | editbeta ]

Lotus Cars has submitted a patent application for a igniter. simpler and more compact dual-clutch transmittal system. The gear box shown in the application is an eight-speed unit. with seven forward cogwheels and contrary. McLaren Automotive [ edit beginning | editbeta ]

McLaren Automotive introduced a seven velocity double clasp on MP4-12C made in Italy by Graziano. The design comes with a characteristic called 鈥淧re-Cog鈥 which allows the driver to preselect the following highest or lowest gear decreasing displacement times. [ 36 ] Mercedes-Benz [ edit beginning | editbeta ]

The Mercedes SLS AMG use a Getrag [ 64 ] AMG 鈥楽peedShift鈥 seven-speed dual-clutch gear box. mounted at the rear in a transaxle constellation. and connected to the engine via a C fiber driveshaft enclosed in an aluminum torsion tubing. [ 64 ] [ 65 ] Harmonizing to Mercedes-Benz. it is capable of gear alterations in every bit small as 100 Ms [ 65 ] The SLS and the Ferrari California portion the same DCT unit. [ 66 ] Mitsubishi [ edit beginning | editbeta ]

Chief article: Twin Clutch SST
The Mitsubishi Motors Lancer Evolution X and Lancer Ralliart are supplied with Mitsubishi鈥檚 Twin Clutch SST ( abbreviated TC-SST. for 鈥淭win Clutch Sport Shift Transmission鈥 or 鈥淭win Clutch Sportronic Shift Transmission鈥 ) dual-clutch transmittal. [ 67 ] governable by maneuvering wheel mounted Mg paddle shifters. [ 68 ] It is the Getrag-built. PowerShift 6DCT470 [ 68 ] [ 69 ] transmittal in the Mitsubishi Lancer Evolution. [ 68 ] [ 69 ] Mitsubishi Fuso Truck and Bus Corporation [ edit beginning | editbeta ] The Mitsubishi Fuso Truck and Bus Corporation presented a universe foremost with a double-clutch transmittal for commercial vehicles. The new six-speed M038S6 鈥淒uonic transmission鈥 characteristics wet clasps and incorporates the ability to crawl in traffic for drum sander operation. Although Duonic-equipped trucks will likely be driven largely in to the full automatic manner. the transmittal can besides be manually shifted. [ 70 ] Nissan [ edit beginning | editbeta ]

The Nissan GT-R鈥檚 rear transaxle six-speed dual-clutch transmittal besides contains the derived function for the car鈥檚 all-wheel thrust ( AWD ) system. Much of the dual-clutch system was engineered by BorgWarner. [ 11 ] partnered with Nissan鈥檚 gear box provider Aichi Machine Industry. and weighs a entire installed mass of 117 kilograms ( 258 pound ) . [ 71 ] [ 72 ] Code named the GR6. the transmittal is rather lasting in that it is able to keep in surplus of 600 ft-lbs of torsion. Nissan reports displacement times of 150 msecs. [ 73 ] PSA Peugeot Citroen [ edit beginning | editbeta ]

PSA has dual-clutch transmittal in Peugeot 4007 and Citroen C-Crosser SUVs. both of which are based on Mitsubishi Outlander and produced by Getrag. However. dual-clutch transmittals are ne’er offered in other theoretical accounts. Porsche [ edit beginning | editbeta ]

Porsche AG offers a series production [ 41 ] of two new longitudinally installed. ZF Friedrichshafen AG designed and built with Porsche [ 42 ] [ 45 ] 鈥7DT鈥 wet-clutch versions [ 41 ] of its antecedently race-only [ 6 ] [ 45 ] Porsche Doppelkupplungsgetriebe [ 45 ] ( PDK ) transmittal. The first discrepancy. the 7DT-45. [ 41 ] is used on its 2009 997 Carrera and Carrera S theoretical accounts. [ 3 ] [ 42 ] [ 74 ] [ 75 ] This version is besides offered on the 2009
Cayman. [ 3 ] [ 41 ] Boxster [ 3 ] [ 41 ] It uses a ZF Sachs ND2015 clasp battalion. [ 41 ] and has a torsion managing capacity of 500 N路m ( 369 lbf路ft ) . [ 41 ] A higher torque version of the same transmittal. the 7DT-70. [ 41 ] is besides available for the 2010 911 Turbo. [ 41 ] [ 76 ] This is rated at 780 N路m ( 575 lbf路ft ) . [ 41 ] and uses a different ZF Sachs clasp 鈥 the ND2216. [ 41 ] The 2nd PDK discrepancy. the 7DT-75. [ 41 ] is available on the 2009 Panamera. [ 3 ] [ 41 ] [ 45 ] [ 77 ] This is constructed basically different to the 7DT-45/7DT-70 versions ; in that the internal shafts are mounted above the input shaft. so as to accomplish a lower Centre of gravitation for the Panamera. [ 41 ] It besides uses merely one oil circuit. [ 41 ] whereas the 7DT-45/7DT-70 usage two separate circuits ; [ 41 ] with really different specifications of fluids needed. [ 41 ] Both discrepancies use seven frontward velocities. [ 3 ] [ 43 ] [ 74 ] and Porsche claim the Doppelkupplung PDK transmittal will replace the outgoing conventional Tiptronic automatic transmittals. [ 42 ] [ 74 ] However. other dependable industry beginnings province that Porsche still intends to utilize conventional machine rifles ; with the eight-speed ZF 8HP being cited. [ 41 ] Like all DCTs. the Porsche PDK transmittal is basically two separate manual transmittals in one. [ 3 ] With the 1st. 3rd. 5th. and 7th cogwheels and contrary available on one shaft. [ 3 ] and 2nd. 4th. and 6th cogwheels available on the other shaft. [ 3 ] [ 78 ] Porsche claims notable betterments in CO2 emanations of around 15 % when comparing DCT installings against its former automatic transmittal. [ 41 ] of which half can be straight attributed to the DCT. [ 41 ] When compared straight with a manual transmittal. 16 % betterment can be straight attributed to the DCT. [ 41 ] Renault [ edit beginning | editbeta ]

Renault will be presenting a new six-speed double dry clasp DCT in the early portion of 2010. This will ab initio be made available on the New Megane with the Director of Central Intelligence 110 DPF engine. [ 79 ] The DCT system was built by Getrag. This will enable these DCT-equipped Meganes to be the marque鈥檚 foremost automatic autos to measure up for the Renault eco? signature. [ 79 ] [ elucidation needed ] . Since 2012 face lift. Renault Megane is likely first Gallic car with dual-clutch transmittal. Volkswagen Group [ edit beginning | editbeta ]

Chief article: Direct-Shift Gearbox
Volkswagen Group produces DCTs under the Direct-Shift Gearbox ( DSG ) name. [ 10 ]
from the German: Direkt-Schalt-Getriebe. [ 80 ] It is used in all of their mainstream trade names. including Volkswagen Passenger Cars. [ 11 ] Audi. [ 11 ] SEAT. Skoda. and Volkswagen Commercial Vehicles. and besides its top-tier trade name Bugatti. Audi originally used the Direct-Shift Gearbox ( DSG ) name. it now uses the name 鈥淪 tronic鈥 for its DCTs. [ 5 ] The first of all time world-wide series production DCT was the Volkswagen Group DQ250 [ 10 ] six-speed dual-clutch transmittal. [ 8 ] with double homocentric moisture multi-plate clasps. [ 8 ] It was produced at the Group鈥檚 Kassel works [ 1 ] [ 2 ] under sole licence from Borg-Warner [ 5 ] [ 11 ] for usage in transverse powertrain installings. of either front-wheel thrust or four-wheel thrust ( 4WD ) layouts. [ 8 ] The 4WD versions are basically indistinguishable to the 2WD versions. but the 4WD versions use an extra bolt-on power take-off unit to direct engine torsion to the Haldex Traction rear axle.

This DQ250 discrepancy is used in a broad scope of theoretical accounts: Volkswagen Passenger Cars ( Polo. Golf/Rabbit/Golf Plus. Scirocco. Jetta. Eos. Passat and Touran ) ; Audi autos ( A3. and TT ) ; SEAT autos ( Ibiza. Leon. Altea and Toledo ) ; Skoda autos ( Octavia and Superb ) ; and Volkswagen Commercial Vehicles ( Caddy and T5 Transporter ) . A 2nd discrepancy of the Direct-Shift Gearbox went into series production in 2008 [ 9 ] 鈥 the DQ200. This consists of seven forward ratios. [ 9 ] but the noteworthy difference over the original DQ250 is the alteration from wet- to dry-clutches. [ 2 ] [ 9 ] This variant uses two single-plate dry clasps. arranged in a tandem design ( alternatively of concentrically ) and are hence similar in size. The DQ200 is once more for usage in transverse applications. but is intended for usage in smaller autos. with smaller supplanting engines that generate comparatively low torsion end products. [ 2 ] [ 9 ] [ 10 ] When used in the latest Golf with the 90 kW ( 122 PS ; 121 horsepower ) engine. this new 7-speed DSG uses approximately 6 % ( 5. 9l/100 kilometer for the 7-speed DSG compared to 6. 3l/100 kilometer with the manual ) less fuel than the same engine with a manual transmittal [ 9 ] and up to 20 % less than a conventional automatic transmittal. [ 9 ] The original DQ250 besides remains available. Volkswagen Group subordinate Audi AG have besides developed an all-new DCT 鈥 the DL501. for usage in longitudinal powertrains. [ 10 ] [ 81 ] Like the original transverse DQ250. this DL501 utilises double wet multi-plate clasps. but unlike the DQ250. this variant uses seven forward ratios. [ 10 ] This DL501 discrepancy made its introduction in the Q5. [ 81 ] and besides is used in the latest versions of the A4 ( B8 ) [ 81 ] and S4 ( B8 ) . [ 81 ] [ 82 ] It is besides be
considered for usage in an all new A6. [ 81 ] Lamborghini. although owned by Volkswagen Group subordinate Audi AG. does non utilize a dual-clutch transmittal ; it has a robotised individual clasp electrohydraulic manual transmittal called 鈥淓 gear鈥 . which is indistinguishable to the old Audi R8 鈥淩 tronic鈥 transmittal. After the face lift in 2012 the R8 uses a seven-speed S tronic. English specializer confer withing technology company Ricardo plc produces the seven-speed DCT for the 736 kW ( 1. 001 PS ; 987 bhp ) 2005 Bugatti Veyron EB 16. 4. [ 1 ] [ 5 ] [ 40 ] Railcar usage [ edit beginning | editbeta ]

A different type of dual-clutch transmittal has been used in some railway cars. The two clasps are placed one on the gear box input shaft and the other on the gear box end product shaft. When a gear alteration is to be made. both clasps are disengaged at the same time and a brake is applied inside the gear box. The gearchange is made with all cogwheels stationary. so no synchronising mechanism is needed. After the gear alteration. both clasps are re-engaged. There would be a important interruption in transmittal. so this system would be unsuitable for shunting engines.

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