Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1994-09-19
1995-11-28
Wolfe, Willis R.
Internal-combustion engines
Charge forming device
Fuel injection system
123481, 123490, 361154, F02D 4122, F02D 4130, H01H 4732
Patent
active
054698251
ABSTRACT:
In a engine and associated fuel injector failure detection circuit, the engine having at least one combustion chamber, a battery, and at least one fuel injector having a high side and a low side terminal for introducing a fuel in the at least one combustion chamber, the fuel injector failure detection circuit comprising a one shot timer for transmitting a constant voltage state signal output when the fuel injector reaches a set current threshold at a start of an injector current peak time duration. A voltage sense comparator is provided for transmitting a low voltage state signal output when the low side terminal of the fuel injector produces a fly-back voltage pulse. A mechanism for monitoring current of the fuel injector during a rise time duration and the peak time duration ia also included. The circuit further provides a mechanism for disconnecting all electrical power supplied to the at least one fuel injector if the injector current fails to reach a peak level during the rise time duration or the fly-back voltage pulse fails to occur at the end of the peak time duration. Moreover, a mechanism for monitoring the fly-back voltage pulse produced by the low side terminal of the fuel injector is also included in the circuit.
REFERENCES:
patent: 3646915 (1972-03-01), Rachel
patent: 3646917 (1972-03-01), Nagy
patent: 3646918 (1972-03-01), Nagy et al.
patent: 4337650 (1982-07-01), Brandt
patent: 4437342 (1984-03-01), Hosaka et al.
patent: 4589401 (1986-05-01), Karim et al.
patent: 4611565 (1986-09-01), Yakuwa
patent: 4618908 (1986-10-01), Anttila
patent: 4680667 (1987-07-01), Petrie
patent: 4683859 (1987-08-01), Tamura et al.
patent: 4696275 (1987-09-01), Kushi et al.
patent: 4736267 (1988-04-01), Karlmann et al.
patent: 4753207 (1988-06-01), Wright
patent: 4766864 (1988-08-01), Ban et al.
patent: 4798084 (1989-01-01), Takahashi et al.
patent: 4979481 (1990-12-01), Shimomura et al.
patent: 4982331 (1991-01-01), Miyazaki
patent: 4989150 (1991-01-01), Tazawa
patent: 5046470 (1991-09-01), Entenmann et al.
patent: 5053911 (1991-10-01), Kopec et al.
patent: 5172588 (1992-12-01), Umemoto
patent: 5173832 (1992-12-01), Giorgetta et al.
patent: 5176122 (1993-01-01), Ito
patent: 5181493 (1993-01-01), Motoyama et al.
patent: 5196833 (1993-02-01), Kemp
patent: 5241933 (1993-09-01), Morikawa
Golab Pawel J.
Lee Anson
Calcaterra Mark P.
Chrysler Corporation
Wolfe Willis R.
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