| abstract |
PCT No. PCT/FR96/00503 Sec. 371 Date Oct. 2, 1997 Sec. 102(e) Date Oct. 2, 1997 PCT Filed Apr. 3, 1996 PCT Pub. No. WO96/31359 PCT Pub. Date Oct. 10, 1996The present invention relates to a semi-automatic gearbox system, characterized by the fact that it includes control means suitable for controlling an automatic or semi-automatic operating mode for changing gear ratios in the gearbox. When actuated by the driver, the gear lever transmits the driver's request to the computer, via the sensors. After analyzing the legitimacy of the driver's request, the module proceeds to change the gear as requested. The module controls the electrically driven valves for controlling the clutch, and gear selection and engagement, and establishes dialog with the engine control computer for appropriately managing the engine torque and the engine speed during the gear change. The commands are confirmed by the position sensors on the actuators, and by the sensors for sensing the engine speed, and the inlet speed and the outlet speed of the gearbox. The absolute gear ratio engaged in the gearbox is displayed on the display. |