Automobile speed control system

Details Automobile speed control system Automobile speed control system

1978-03-24

1980-05-13

Smith, Jr., David

Motor vehicles

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

Including fluid pressure actuated servomechanism

123102, B05K 3100

Patent

active

042024242

ABSTRACT:
Automobile speed control system to maintain actual automobile speed to desired automobile speed, in which a first electrical signal indicating the actual automobile speed is compared with a second electrical signal indicating the desired automobile speed with a comparator circuit to obtain an error signal indicating speed difference between the actual and desired automobile speeds. The error signal is supplied to throttle valve control means to shift the throttle valve into a position at which the actual automobile speed equals to the desired automobile speed. The error signal, through an electrical first order lag circuit, is fed back to the comparator circuit to stabilize speed control operation of the system, whereby the prior art feedback potentiometer, in prior arts linked to the throttle valve to supply negative feedback signal to the comparator circuit is eliminated.

REFERENCES:
patent: 3952829 (1976-04-01), Gray
patent: 3998191 (1976-12-01), Beyerlein et al.
patent: 4084656 (1978-04-01), Abend et al.
patent: 4094378 (1978-06-01), Scheyhing et al.
patent: 4133406 (1979-01-01), Allerdist

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