System and method for automatically running a vehicle at a desired cruising speed
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United States of America Patent
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Sep 26, 1989
Grant Date -
N/A
app pub date -
Jun 12, 1987
filing date -
Jun 12, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A system and method for automatically running a vehicle at a desired cruising speed, in which a running resistance of the vehicle is always derived, a target opening angle of a throttle valve of a vehicular engine which can run the vehicle at a desired constant acceleration and/or at the desired cruise running speed is derived under the derived running resistance, and the opening angle of the throttle valve is controlled in a feedforward control mode so as to coincide with the target opening angle. The automatic cruise running system and method can achieve no variation of vehicle speed when the vehicle runs on a rugged road.
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