Vehicle speed control circuit

Details Vehicle speed control circuit Vehicle speed control circuit

1979-02-28

1982-04-06

Peters, Jr., Joseph F.

Motor vehicles

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

Including fluid pressure actuated servomechanism

B60K 3100

Patent

active

043231349

ABSTRACT:
There is disclosed an apparatus for automatically maintaining the speed of a vehicle at a desired speed as selected by the vehicle operator. The apparatus includes one feedback loop for monitoring the actual vehicle speed and another feedback loop for monitoring the engine load. The engine load feedback loop enables the speed control to anticipate the effects of changes in road speed so as to minimize or eliminate undershoot or overshoot of the control system. A signal representing the actual vehicle speed is combined with a signal representing the engine load to generate a composite feedback signal to a comparator circuit. The comparator circuit compares the feedback signal with a signal representing the desired vehicle speed and generates control signals for maintaining the speed of the vehicle at the desired speed.

REFERENCES:
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patent: 3441104 (1969-04-01), Hagler
patent: 3575256 (1971-04-01), Jania et al.
patent: 3648798 (1972-03-01), Jania
patent: 3705639 (1972-12-01), Colling et al.
patent: 3820624 (1974-06-01), Sakakibara
patent: 3910646 (1975-10-01), Grix
patent: 3946707 (1976-03-01), Gray
patent: 3952829 (1976-04-01), Gray
patent: 4083423 (1978-04-01), Williams et al.
patent: 4142612 (1979-03-01), Riddel
patent: 4190026 (1980-02-01), Sakakibara

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