Motor vehicles – With means responsive to speed of vehicle for maintaining... – Including electrically actuated servomechanism
Patent
1989-06-09
1991-09-17
Kashnikow, Andres
Motor vehicles
With means responsive to speed of vehicle for maintaining...
Including electrically actuated servomechanism
180170, 36442604, B60K 3104
Patent
active
050486314
ABSTRACT:
A System and method for automatically controlling a vehicle speed to a desired cruise speed are disclosed in which a control unit determines whether a control mode is a steady state mode in which the vehicle cruises at a set target vehicle speed or a transient state in which the target vehicle speed is transiently changed on the basis of input data of the actual vehicle speed, set target vehicle speed, an actual opening angle of an engine throttle valve, and a target opening angle of an engine throttle valve determined on the basis of a running resistance of the vehicle. In the steady state mode, the control unit controls a throttle actuator so that the target opening angle of the throttle valve coincides with the actual vehicle speed and actual vehicle speed is matched with the target vehicle speed. In a transient mode in which the vehicle speed is set in an acceleration or in a deceleration, a power supply signal supplied to the throttle actuator is variably controlled and the variable control is continued until the actual opening angle is matched with the target opening angle of the throttle valve. Therefore, a smooth switching between the steady state mode and transient state mode can be achieved.
REFERENCES:
patent: 4549266 (1985-10-01), Schneider et al.
patent: 4819172 (1989-04-01), Takeuchi et al.
Culbreth Eric
Kashnikow Andres
Nissan Motor Company Limited
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