DUTY CONTROL TYPE CONSTANT SPEED TRAVELING CONTROLLER

摘要

PURPOSE:To prevent a hunting immediately after a target car speed is set up, by fixing the correction term of a set duty to constant values which are different from each other in car speed ranges for a prescribed time after the target car speed is set up. CONSTITUTION:The entitled device calculates a skip car speed Vs by adding an acceleration which is obtained by differentiating a traveling car speed Vn to this traveling car speed Vn which is obtained from a car speed signal. And a control valve for controlling the opening of a throttle is controlled by calculating on output duty D from a gain G, a set duty SD and a deflection DELTAV between the car speed Vs and a target car speed (stored car speed) VM. The set duty SD is determined using an integral element SD1 which responds to the change of a duty slowly and another integral element DM which responds thereto. In this case, the another integral element DM which responds thereto. In this case, the correction term beta of the SD1 is fixed to constant values which are different form each other in car speed ranges for a prescribed time after the target car speed is set up, thereby an integral speed is restrained.