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Chrysler's New Dual-Clutch Transmission to Debut in 2008
1st June, 2008 | |||||
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Chrysler’s new dual-clutch transmission — developed in partnership with Getrag — makes its debut in 2008. The new technology — available in Australia on the all-new Dodge Journey — will provide consumers a fuel economy improvement and CO2 emissions reduction of 6 percent. “Chrysler’s new dual-clutch transmission is the next step in transmission technology, offering consumers improved fuel economy along with smoother and quicker shifting,” said Frank Klegon, Executive Vice President – Product Development. “This important technology is one of several initiatives we have in place to directly focus on improving fuel efficiency across our vehicle line-up.” Dual-clutch Transmission Technology Chrysler’s dual-clutch transmission technology improves fuel economy and CO2 emissions by reducing parasitic losses—first, by eliminating the torque converter and second, through the use of synchronisers instead of shift clutches. In its first Chrysler LLC vehicle applications, the new dual-clutch transmission will debut in international markets on the all-new 2008 Dodge Journey when matched to the turbo-diesel variant. The dual-clutch transmission is an automatic transmission which utilises dual launch and shift clutches with a manual transmission style lay-shaft gear arrangement, instead of a conventional torque converter and planetary gears. One clutch drives the odd numbered gears and reverse, while the other clutch drives the even numbered gears. During shifts, the next gear is anticipated and pre-selected. Then one clutch is opened while the other is closed, allowing shifting without torque interruption. The result is quicker acceleration and refined shift quality. Further, with the lay-shaft arrangement of gears, there is increased flexibility to optimise gear ratio selection for performance and fuel economy. The all-new dual-clutch transmission does not require a torque converter to transfer engine torque to the transmission. Instead, it uses two wet multi-plate clutches. With the wet multi-plate clutch system, the clutch components are bathed in lubricating/cooling fluid in order to provide adequate thermal capacity. The wet multi-plate clutch system uses hydraulic pressure to actuate the clutches and provide for gear selection. With this system, the power flow from the engine to the transmission is not interrupted during a shift, resulting in a power-on shift. This means that there is less torque disturbance than a conventional planetary automatic transmission with torque converter. Also, by eliminating the torque converter and reducing the number of shift clutches, parasitic losses are reduced leading to improved fuel economy. | ||||||
The
"Classic Motor Sport Tour" includes visits to Goodwood Revival,
Donington Grand Prix Collection, Grand Prix Historique de la Vienne, Manoir de L'Automobile and Museum de L'Automobile at Le Mans and, for a
farewell dinner, Atelier Renault on Champs Elysees. Also included are city tours of London and Paris, Classic Team Lotus Works tour and Brands
Hatch race master (with an opportunity of a drive in a high performance Renault). This great tour includes return economy air fares, departure
tax, transfers, 13 breakfasts, 3 dinners and 13 nights accommodation.
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