System and method for automatically controlling cruising speed of a vehicle
This patent describes a system for automatically controlling a vehicle speed to a desired cruise speed. It comprises an actuator for actuating an engine driving force adjusting mechanism to change an operating variable of the engine driving force adjusting mechanism so that the vehicle speed is controlled; first means for operatively commanding the actuator to actuate the engine driving force adjusting mechanism so that the vehicle speed is changed at a constant rate, and for operatively commanding the actuator to actuate the engine driving force adjusting mechanism so that the vehicle speed is maintained; second means for detecting the vehicle speed; third means for setting a first initialize signal and providing the first initialize signal for the actuator during a first initialization control for the actuator to prevent a drop in vehicle speed immediately after the first means operatively commands the actuator to actuate the engine driving force adjusting mechanism so that the vehicle speed is changed at the constant rate; fourth means for setting a tap-up to initialize signal and providing the tap up initialize signal for the actuator during a tap-up initialize for the actuator so as to slightly increase the vehicle speed immediately after the first means operatively commands the actuator to change the vehicle speed; fifth means for setting a small initialize signal and for providing the small initialize signal for the actuator during a small initialize control to improve a response characteristic of the actuator to a control signal. The small initialize signal being set so as to have the predetermined functional relationship to the first initialize signal value.
- Assignee:
- Nissan Motor Co. Ltd., Yokohama
- Patent Number(s):
- US 4845622
- OSTI ID:
- 5375946
- Country of Publication:
- United States
- Language:
- English
Similar Records
Vehicle speed control system
Vehicular enginee idel speed and cruise control system