초록 ▼

An automatic speed control system for an automotive vehicle comprises a vehicle-speed sensor, a throttle actuator adjusting an opening angle of a throttle, a brake actuator adjusting a brake-fluid pressure applied to wheel cylinders, and a switching-operation decision unit controlling the switching

An automatic speed control system for an automotive vehicle comprises a vehicle-speed sensor, a throttle actuator adjusting an opening angle of a throttle, a brake actuator adjusting a brake-fluid pressure applied to wheel cylinders, and a switching-operation decision unit controlling the switching from one of a driving-force control of the throttle actuator and a braking-force control of the brake actuator to the other. A first arithmetic circuit calculating a command signal value for the throttle actuator and a second arithmetic circuit calculating a command signal value for the brake actuator are designed to provide transition durations. The decision unit acts to continue either one or the other control executed prior to a transition for its transition duration.

대표청구항 ▼

[ What is claimed is:] [1.] An automatic speed control system for an automotive vehicle, comprising:detection means for detecting a vehicle speed of the vehicle;acceleration means for providing an increased acceleration exerted on the vehicle by automatically adjusting a driving force applied to roa

[ What is claimed is:] [1.] An automatic speed control system for an automotive vehicle, comprising:detection means for detecting a vehicle speed of the vehicle;acceleration means for providing an increased acceleration exerted on the vehicle by automatically adjusting a driving force applied to road wheels;deceleration means for providing an increased deceleration exerted on the vehicle by automatically adjusting a braking force applied to the road wheels;first arithmetic means for calculating a value of a first command signal to be sent to said acceleration means, based on a target vehicle speed and the vehicle speed detected by said detection means;second arithmetic means for calculating a value of a second command signal to be sent to said deceleration means, based on said target vehicle speed and the vehicle speed detected by said detection means; anddecision means for switching from one of a driving-force control of said acceleration means and a braking-force control of said deceleration means to another, so that, during said driving-force control, said driving-force control is continued until the value of said first command signal reaches a first predetermined threshold and said driving-force control is switched to said braking-force control when said first predetermined threshold is reached, and so that, during said braking-force control, said braking-force control is continued until the value of said second command signal reaches a second predetermined threshold and said braking-force control is switched to said driving-force control when said second predetermined threshold is reached, during a simultaneous occurrence of said first command signal having a value greater than said first predetermined threshold and said second command signal having a value greater than said second predetermined threshold.