Brake checking system

Details Brake checking system Brake checking system

1976-10-08

1977-09-06

Waring, Alvin H.

Communications: electrical

Selective

Having indication or alarm

200 6144, B60T 1722

Patent

active

040471497

ABSTRACT:
The inclusion of air into the brake system or the presence of a clearance between the brake shoes and the brake drums which is greater than a predetermined value is detected from the fact that the residual stroke of the brake pedal is increased each time the brake pedal of a vehicle is depressed. A brake sensor produces a frequency corresponding to the displacement of the brake pedal, and first and second displacement detecting circuits respectively detect the maximum displacement during first and second brake pedal movements. A comparison circuit compares the maximum displacements detected by the detecting circuits and produces a signal corresponding to the difference between the maximum displacements and a display circuit displays the signal from the comparison circuit to give a warning.

REFERENCES:
patent: 3776329 (1973-12-01), Hope et al.
patent: 3808593 (1974-04-01), Kopernik et al.

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