Method of detecting abnormality in fuel supply systems of intern

Details Method of detecting abnormality in fuel supply systems of intern Method of detecting abnormality in fuel supply systems of intern

1991-02-01

1991-12-10

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

F02D 4114

Patent

active

050708473

ABSTRACT:
A method of detecting abnormality in a fuel supply system of an internal combustion engine. An amount of fuel supplied to the engine is controlled in a feedback manner based on an air-fuel ratio correction coefficient set in response to an output signal from at least one exhaust gas component concentration sensor. The method comprises the steps of (1) calculating an abnormality determination value based on the air-fuel ratio correction coefficient, (2) calculating a learned average value of the air-fuel ratio correction coefficient, (3) renewing the abnormality determination value when the calculated learned average value of the air-fuel ratio correction coefficient falls outside a first predetermined range defined based upon the abnormality determination coefficient, and (4) determining that the fuel supply system is abnormal when the renewed value of the abnormality determination value falls outside a second predetermined range defined by predetermined upper and lower limit values.

REFERENCES:
patent: 4392471 (1983-07-01), Miyagi et al.
patent: 4664086 (1987-05-01), Takeda et al.
patent: 4699111 (1987-10-01), Yasuoka
patent: 4715344 (1987-12-01), Tomisawa
patent: 4844038 (1989-07-01), Yamato et al.
patent: 4870938 (1989-10-01), Nakaniwa
patent: 4895122 (1990-01-01), Noguchi et al.
patent: 4913122 (1990-04-01), Uchida et al.
patent: 4934328 (1990-06-01), Ishii et al.
patent: 4951632 (1990-08-01), Yakuwa et al.
patent: 4984551 (1991-01-01), Moser

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