Air bypass valve tester

Details Air bypass valve tester Air bypass valve tester

1990-12-24

1992-07-14

Harvey, Jack B.

Electricity: measuring and testing

Electromechanical switching device

324503, 324418, 137554, G01R 3102

Patent

active

051306573

ABSTRACT:
A tester for a vehicle engine idle air control system includes an air bypass valve operated by a solenoid which receives a pulse width modulated signal to control the degree of opening of the valve. The tester is inserted in the vehicle wiring harness and includes a manually controlled pulse width modulator for generating a test voltage to the solenoid. A switch is connected within the tester to switch between engine computer control or manual modulator control of the solenoid. A bar graph display monitors the voltage supplied to the solenoid to indicate the magnitude thereof. The bar graph display also indicates the occurrence of short or open circuits.

REFERENCES:
patent: 3646438 (1972-02-01), Staff
patent: 4764727 (1988-08-01), McConchie, Sr.
patent: 4764729 (1988-08-01), Yakawa et al.

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