Vehicle condition monitoring system

Details Vehicle condition monitoring system Vehicle condition monitoring system

1974-12-11

1976-08-17

Caldwell, John W.

Communications: electrical

Selective

Having indication or alarm

340 81R, 340 52R, 340 85, 340251, 331 64, 315 77, B60Q 126

Patent

active

039757080

ABSTRACT:
A display panel or console is mounted in the driving compartment of the vehicle in a position to be observed by the driver and provides status information regarding, for example, the operability of the headlights or taillights, and position information concerned primarily with the position of the trailer relative to the cab and whether there is a "jacknife" condition. The system may also check the status of truck tire pressure and brake drum temperature to determine if the pressure is too low or the temperature too high. The lights, for example, are checked by monitoring the continuity to the filament. The existing lines to the lamp are pulsed with a filtered square wave signal and a resistance sensor determines continuity; a lack of continuity causing illumination of the associated status lamp of the display panel. In another arrangement a memory circuit is associated with each indicator circuit so that a fault condition is stored and remains stored even if corrected. A diagnostic unit can then be later used to detect the condition of each memory circuit.

REFERENCES:
patent: 3355708 (1967-11-01), Perry
patent: 3421157 (1969-01-01), Atkins

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