Structure of system for automatically controlling vehicle speed

Details Structure of system for automatically controlling vehicle speed Structure of system for automatically controlling vehicle speed

1990-08-23

1992-04-14

Lall, Parshotam S.

Boots, shoes, and leggings

36443107, B60K 3100

Patent

active

051053616

ABSTRACT:
A structure of a system for automatically controlling a vehicle speed to a desired cruise speed is disclosed in which, when a signal generated by a cancel switch provided for halting a control operation of the system, is generated by a turning on of the cancel switch, a voltage applying portion, intervened between the cancel switch and each signal lines connected between one of set/coast switch and acceleration/resume switch and a corresponding input end of a control circuit, generates a voltage whose level is different from that generated when either set/coast or acceleration/resume switch is operated, the voltage being supplied to each of the signal lines. A signal generating portion provides a third signal in response to the applied voltage from the voltage applying portion to another input end of the control circuit. Thus, the cancel switch signal can be distinguished and identified from the other switch signals derived from the set/coast and acceleration/resume switches even if one or all of the signal lines has failed.

REFERENCES:
patent: 4451888 (1984-05-01), Kuno et al.
patent: 4540060 (1985-09-01), Kawata et al.
patent: 4829438 (1989-05-01), Etoh
patent: 4879655 (1989-11-01), Mori
patent: 4914595 (1990-04-01), Suzuki et al.
patent: 4914596 (1990-04-01), Etoh et al.

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