Transmission system
First Claim
1. A vehicle transmission system comprising a main drive clutch, a clutch-actuator means for controlling a degree of engagement of the main drive clutch, a transmission with a plurality of ratios, a gear-engaging mechanism for engaging an operative ratio of said transmission, a gear-selector lever that is operable by a driver for selecting said operative ratio, and an electronic control means for controlling the clutch-actuator means and the gear-engaging mechanism, wherein the control means includes a starter means for initiating a start-up phase from a standstill condition of the vehicle, said control means being operative to disengage the clutch and to automatically shift the transmission into a predetermined start-up gear when the start-up phase is initiated from the standstill condition, said control means further being operative to shift the transmission into a higher start-up gear than said predetermined start-up gear, if the driver selects the higher start-up gear through the gear-selector lever while the vehicle is in the standstill condition and the predetermined start-up gear is engaged.
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Accused Products
Abstract
A vehicle transmission system has a main drive clutch (14) with a clutch-actuator (20, 22, 38), a transmission (12) with a gear-engaging mechanism (25), a driver-operable gear-selector lever (24), and an electronic control means (36) to control the clutch-actuator (20, 22, 38) and the gear-engaging mechanism (25). When the vehicle is started up from a standstill condition, the control means disengages the clutch and automatically shifts the transmission into a predetermined start-up gear. According to the invention, the electronic control means (36) is designed to allow the driver to operate the gear-selector lever (24) to select a higher start-up gear than the predetermined start-up gear that is selected automatically by the electronic control means.
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Citations
10 Claims
- 1. A vehicle transmission system comprising a main drive clutch, a clutch-actuator means for controlling a degree of engagement of the main drive clutch, a transmission with a plurality of ratios, a gear-engaging mechanism for engaging an operative ratio of said transmission, a gear-selector lever that is operable by a driver for selecting said operative ratio, and an electronic control means for controlling the clutch-actuator means and the gear-engaging mechanism, wherein the control means includes a starter means for initiating a start-up phase from a standstill condition of the vehicle, said control means being operative to disengage the clutch and to automatically shift the transmission into a predetermined start-up gear when the start-up phase is initiated from the standstill condition, said control means further being operative to shift the transmission into a higher start-up gear than said predetermined start-up gear, if the driver selects the higher start-up gear through the gear-selector lever while the vehicle is in the standstill condition and the predetermined start-up gear is engaged.
Specification