System and method for automatically controlling vehicle speed to

Details System and method for automatically controlling vehicle speed to System and method for automatically controlling vehicle speed to

1992-01-21

1992-08-11

Mitchell, David M.

Motor vehicles

With means responsive to speed of vehicle for maintaining...

Including electrically actuated servomechanism

36442604, B60K 3100

Patent

active

051371049

ABSTRACT:
A system and method for automatically controlling a vehicle speed to a desired cruise speed are disclosed in which a target opening angle of an engine throttle valve through which the vehicle can maintain a set cruise speed is derived in accordance with a prepared non-linear characteristic table and an opening angle of the throttle valve is controlled so that a detected vehicle speed coincides with the set cruise speed and a detected opening angle of the throttle valve coincides with the target opening angle. In addition, when the detected vehicle speed and detected opening angle are substantially constant for a predetermined time due to the vehicle being run on a flat road, average values of both detected vehicle speed and detected opening angle are derived and the above-described non-linear characteristic is corrected using both average values.

REFERENCES:
patent: 4598370 (1986-07-01), Nakajima
patent: 4763912 (1988-08-01), Matsuda
patent: 4771850 (1988-09-01), Matsuda
patent: 4829438 (1989-05-01), Etoh
patent: 4835696 (1989-05-01), Suzuki et al.
patent: 4845622 (1989-07-01), Suzuki et al.
patent: 4870584 (1989-09-01), Etoh et al.

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