Automatic motor vehicle cruise control - has engine output torque controlled by adjusting throttle position of throttle valve and automatic speed control system with vehicle speed detector.

摘要

A first throttle target position computer is connected to the vehicle travel speed detector. To determine a first throttle target position, for reaching the vehicle target speed during a period with a uniform condition, on the basis of the detected vehicle speed and the set vehicle target speed. A target torque determination unit is connected with a travel resistance detector and an engine adjusted condition detector. In order to determine a target torque of the engine during a transition period directly after the start or resumption of constant speed control, on the basis of the determined travel resistance and gear change ratio. A second throttle target position computer is connected to the target torque determination unit, to determine a second throttle target position based on a determined torque, directly after the start or resumption of the constant speed control is reached. A throttle control unit is connected to the 1st and 2nd computers. To set the throttle position during the transition period directly after the start or resumption of the constant travel speed control, to the second throttle target position and during uniform condition after transition to the first throttle target position. ADVANTAGE - Engine revs. hunting is effectively suppressed during transient periods.