Fuel supply control method having fail-safe function for abnorma

Details Fuel supply control method having fail-safe function for abnorma Fuel supply control method having fail-safe function for abnorma

1983-05-20

1985-02-12

Lall, Parshotam S.

Internal-combustion engines

Charge forming device

Fuel injection system

123198DB, 60605, F02M 5100

Patent

active

044984430

ABSTRACT:
A fuel supply control method for electronically controlling the quantity of fuel being supplied to an internal combustion engine having a turbocharger, in response to values of engine control parameters including at least pressure in the intake passage of the engine, the method having a fail-safe function for an abnormality in the functioning of a pressure detecting means for detecting the above intake passage pressure. When there occurs an abnormality in the above pressure detecting means and at the same time, if the engine is operating in a predetermined supercharged operating condition, control is effected by interrupting the fuel supply to the engine during an interval of time when a condition is satisfied that an abnormality occurs in the absolute pressure detecting means while simultaneously the engine is operating in the above predetermined supercharged operating condition. Preferably, either when a value of the intake passage pressure detected by second pressure detecting means exceeds a predetermined value, or when a throttle valve opening of the engine exceeds a predetermined value, it is determined that the engine is operating in the above predetermined supercharged operating condition.

REFERENCES:
patent: 3188797 (1965-06-01), Toth, Jr.
patent: 3541784 (1970-11-01), Hasse
patent: 4044560 (1977-08-01), Dorsch et al.
patent: 4400944 (1983-08-01), Iwamoto et al.

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