Warning system for nozzle clog of a fuel injector

Details Warning system for nozzle clog of a fuel injector Warning system for nozzle clog of a fuel injector

1991-02-22

1991-10-22

Kamen, Noah P.

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

73119A, F02B 7700

Patent

active

050585479

ABSTRACT:
An automotive engine has a fuel injector provided for injecting fuel directly in a cylinder of the engine. A control unit has a calculator for producing a basic fuel injection pulse width signal. Engine speed at idling state is compared with a desired idle speed and a correcting pulse width is produced. The basic pulse width signal is corrected with the correcting pulse so as to converge the idle speed to the desired idle speed. The correcting pulse width is compared with a reference pulse width and an alarm signal is generated when the correcting pulse width is larger than the reference pulse width. In response to the alarm signal, an alarm is operated to warn the nozzle clog.

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