Circuit for automatic shut-down of electronically controlled die

Details Circuit for automatic shut-down of electronically controlled die Circuit for automatic shut-down of electronically controlled die

1992-03-12

1993-01-19

Kamen, Noah P.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

F02B 7708

Patent

active

051799200

ABSTRACT:
An engine diagnostic testing procedure requires that the fuel shut-off solenoid valve remain connected to the engine's electronic control module during diagnostic testing. A normally closed set of contacts of a relay is interposed in the wiring between the module and the valve. This relay is part of an automatic shut-down circuit that uses several principal components of a known shut-down system along with two additional relays and three diodes to provide the engine with an automatic shut-down system that is independent of the engine's electronic control module, yet that will not disconnect the fuel shut-off solenoid valve from the electronic control module during diagnostic engine testing.

REFERENCES:
patent: 3602207 (1971-08-01), Kilmer
patent: 3964018 (1976-06-01), Strait et al.
patent: 4556029 (1985-12-01), Yamaguchi et al.
patent: 4630588 (1985-12-01), Sagawa
patent: 4648364 (1987-03-01), Wills

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