System for determining malfunctions of a fuel injection control

Details System for determining malfunctions of a fuel injection control System for determining malfunctions of a fuel injection control

1997-05-28

1998-09-15

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

With fuel pump

123359, F02M 3704, F02D 3100

Patent

active

058064982

ABSTRACT:
A system is for a diesel engine for detecting malfunctioning of an injection timing control apparatus. The apparatus controls an injection timing of fuel, pressurized by a pump, to be injected from injection nozzles. An electronic control unit (ECU) computes a target injection timing based on the running condition. The ECU controls the injection timing to set the actual injection timing to the target injection timing. The ECU computes a difference between the actual injection timing and the target injection timing. The ECU determines whether the injection timing control apparatus is malfunctioning when the difference between the actual timing and the target timing is greater than a predetermined value. The determination by the ECU is altered in accordance with the running condition of the engine.

REFERENCES:
patent: 4502439 (1985-03-01), Nagase et al.
patent: 4541380 (1985-09-01), Oshizawa et al.
patent: 5188084 (1993-02-01), Sekiguchi
patent: 5682864 (1997-11-01), Shirakawa
patent: 5697347 (1997-12-01), Enomoto et al.
patent: 5706780 (1998-01-01), Shirakawa

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