1. The double clutch transmission the DCT
Introduction
The dual clutch transmission (Dual Clutch Transmission) DCT different from the general automatic transmission system
[123 ] it is based on a manual transmission but not the automatic transmission, manual transmission in addition to the flexibility and comfort of an automatic transmission, but also can provide uninterrupted power output. The traditional use of a manual transmission clutch, when the shift, the driver must depress the clutch pedal, so that the different gears to make gear meshing operation, and the power interruption occurs during a shift would make intermittent output performance has .
DCT’s core technology lies in the US alone Borg Warner (BorgWarner) and Schaeffler (Schaeffler) in the hands of the group. BorgWarner is a provider public key of the first generation the DSG six-speed technologies (public DCT), to provide the public wet dual clutch DSG. This spring, Volkswagen released a new generation seven-speed dual dry clutch transmission, owned by the German company Schaeffler Group LuK provided.
principle
DCT containing two automatic clutch control, driven by electronic and hydraulic control, can simultaneously control the operation of the two clutches. When the transmission operation, a set of gears is engaged, while approaching the shift, the next set of gear has been pre-selected gear stage, but still in the disengaged state of the clutch; When the shift, a clutch gear used in the separation, while another clutch engagement has been pre-selected, during the entire shift ensure that at least a set of gears on the output power, so that the power interrupt condition does not occur. In line with the above operation, when the drive shaft is divided into two parts, the DCT motion, a drive shaft is solid, the other hollow drive shaft. Solid driveshaft is connected to 1,3,5 and reverse gear, while the hollow drive shaft is connected, 4 and 6-speed, two each responsible for a drive shaft of the clutch engagement action, engine power willWill make uninterrupted transmitted by which a drive shaft.
Compared with the conventional manual transmission, the DSG easier to use, because in the final analysis, it is an automatic transmission, except for using the new technology DCT, so that automatic manual transmission includes a performance, while significantly improving vehicle fuel economy, DCT than the manual transmission shift faster and smoother, uninterrupted power output. Based on the characteristics and mode of operation of the DCT, DCT system gives the driver can drive like a car-like feel. Further, it eliminates the manual transmission torque interruption when shifting feeling, the driver more sensitive. Based on its use manual transmission as the basis for its unique design, DCT can withstand up to 350 cow middot; meters of torque,
BACKGROUND
In 1940, Darmstadt University Professor Rudolph Franke first applied for a patent dual-clutch transmission, the transmission has been tested on a truck, but did not put into mass production. Then the invention is also dedicated to a Porsche car dual clutch transmission (PDK Porsche Doppel Kupplungen). However, at that time, it failed to DCT / PDK technology into mass production.
In 1985, the dual clutch technology for Audi racetrack was named ldquo; Audi Sport Quattro S1 car with dual clutch technology rdquo ;. Audi’s dual-clutch technology enables the car was driving in the major cross-country track and win more races.
By the late 1990s, Volkswagen and BorgWarner to work together to produce a first for mass production and used in mainstream models DualTronic (R) dual-clutch transmission technology.
Borg Warner by using new electronic hydraulic components becomes very practical to make DCT transmission. In 2002, DCT application in Germany, Volkswagen Golf R32 V6 and Audi TT. In 2003, that have been extended to golf and other models.
In 2004, DCT first match with the TDI diesel engine in the Volkswagen Touran (Touran) models.
DCT for its excellent fuel economy in Europe and become ldquo; new favorite rdquo ;. BorgWarner DCT new project this year (2007) production, mainly luxury passenger cars, sports facilities, annual production capacity of 600,000 sets.
Category
wet dual clutch transmission, a dry dual clutch transmission
Application
2007 when in November, BorgWarner announced the full implementation of the plan is expected to be a year for 2.3 million pairs clutch transmission offers its innovative DualTronic (R) technology. This remarkable growth has been the company’s first dual-clutch transmission technology to market driven, from the technical transmission of the vehicle manufacturers around the world and it won the business, including Volkswagen, Audi, Bugatti (Bugatti), Shanghai Automotive Industry Corporation and Nissan (Nissan) projects and Getrag (Getrag) and global manufacturer of five car project.
Based on the companies DCT technique different transmission
Mass DSG (Direct Shift Gearbox)
Audi S Tronic
BMW M DKG (Doppel Kuppling Getriebe, M Double Clutch gearbox)
Ford, Volvo Powershift
Porsche PDK (Porsche Doppelkupplungsgetribe)
Mitsubishi Twin Clutch SST