Patent ID: 6377882
Filing Date: 2002-04-23
Classification: B60W,F16H,Y10T

Abstract:
A vehicle control apparatus in a vehicle having a power source and a continuously variable transmission, comprising a vehicle vibration reducer including:a backlash-reducing control portion designed so that when the power source and the continuously variable transmission change from a driven state to a driving state with respect to a wheel side, the backlash-reducing control portion performs a backlash-reducing control that substantially eliminates a backlash present in a power transmitting system so as to reduce a vibration of the vehicle caused by the backlash, and a transient surge-reducing control portion that subsequently performs a transient surge-reducing control that increases, in a stepped manner, a control torque applied to the wheel side so as to reduce the vibration of the vehicle by controlling an output torque of the power source and a speed transfer ratio of the continuously variable transmission based on a natural vibration frequency of the vehicle, wherein the vehicle vibration reducer sets an initial control duration of the transient surge-reducing control following the backlash-reducing control to a duration that is shorter than a half of a natural vibration period of the vehicle, based on a control amount of the backlash-reducing control.