CONSTANT-SPEED RUNNING APPARATUS WITH FAULT MONITORING FOR AUTOMOBILE

摘要

PCT No. PCT/JP89/00071 Sec. 371 Date Nov. 27, 1989 Sec. 102(e) Date Nov. 27, 1989 PCT Filed Jan. 26, 1989 PCT Pub. No. WO89/07059 PCT Pub. Date Aug. 10, 1989.A high-safety constant-speed running apparatus for an automobile which periodically provides an OFF signal for a small time having no effect on driving an actuator. The OFF signal is located in a signal controlling the actuator which is outputted from a micro-computer by a control signal OFF device. Presence or absence of this OFF signal is monitored by a control signal monitor, and when the OFF signal is not detected for a predetermined time or more a determination is made that the micro-computer is abnormal, which drives the actuator in the direction of closing a throttle valve through a throttle close control signal output, and thereby closes the throttle valve when the micro-computer is abnormal. This can reliably return the car to operating based on the driver's commands.