Vehicle cruise control system

Boots – shoes – and leggings

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Details

180179, B60K 3100

Patent

active

049243977

ABSTRACT:
A vehicle cruise control system, comprising a control circuit for producing a control signal for maintaining a speed of a vehicle at a fixed level according to a difference between an actual vehicle speed and a target vehicle speed, and a drive circuit for producing a drive signal for selectively driving an actuator in a direction either to accelerate the vehicle or to decelerate the vehicle according to the control signal from the control circuit. The drive circuit is provided with a transistor bridge circuit comprising four drive transistors for producing the drive signal. The control circuit is provided with a detection means for detecting an abnormal state of the system and an inhibiting means which brings at least one of the drive transistors into an non-conductive state when any abnormal state is detected by the detecting means. The control circuit may be programmed to perform a certain diagnostic procedure for testing the soundness of the drive transistors. Thus, erratic behavior of the cruise control system and destruction of the drive transistors can be effectively prevented.

REFERENCES:
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patent: 4380799 (1983-04-01), Allord et al.
patent: 4394739 (1983-07-01), Suzuki et al.
patent: 4434469 (1984-02-01), Suzuki et al.
patent: 4451888 (1984-05-01), Kuno et al.
patent: 4451890 (1984-05-01), Suzuki et al.
patent: 4524893 (1985-06-01), Class et al.
patent: 4539642 (1985-09-01), Mizuno et al.
patent: 4540060 (1985-09-01), Kawata et al.

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