A method for gear selection during driving of a vehicle in a driving condition steep

摘要

A method for gear selection during driving of a vehicle in a driving condition steep slope, said vehicle comprising a motor (1) with an output shaft of the engine connected to an automatic mechanical transmission (9), a shaft output transmission connected to at least one driven wheel of the vehicle, at least one control assembly (45) for receiving input signals including signals indicative of: - the coupled relationship of said transmission, - the control displacement gas (48) to the torque required motor, - at least one of the vehicle speed, the rotational speed of said motor and rotating said input shaft and for processing said signals speed according to logic rules programmed to issue command output signals to said engine (1) for controlling the engine and said transmission (9) for gearshift, cuand or driving condition is detected steep a target speed for said driving condition slope is determined, said target speed being the highest possible speed with the speed ratio as low as possible in the vehicle, in view of at least current circumstances, will be able at least in theory to maintain a constant vehicle speed or accelerate at least slightly, characterized in that a further selection of downshifts into a sequence of downshifts will be adapted so that a rate below said speed target is not selected and engaged.