The multi-speed automatic transmission wire of the pulse width modulation method for controlling a reverse gear starting

The present invention discloses a multi-speed pulse width modulation wire reverse gear automatic transmission start control method by setting the starting end of the vehicle speed value v0, the fixed cycle control cycle T0, the vehicle speed detection signal R range switch signal, a vehicle speed sensor v, by the electronic control unit powered by a pulse width function cycle T (v) = (1 + α) Tδ + βTδv / v0 the determined reverse power cycle energization pulse width control of the electromagnetic clutch, to achieve the automatic transmission wire down stop start control, the start control method can satisfy different driving habits of the driver, to avoid starting of the engine stall, the automatic transmission wire to achieve a smooth start.