Cylinder fault detection using rail pressure signal

Details Cylinder fault detection using rail pressure signal Cylinder fault detection using rail pressure signal

1995-01-06

1996-02-20

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Fuel injection system

123198D, 73119A, F02M 4702, F02B 7700, G01M 1500

Patent

active

054920990

ABSTRACT:
An apparatus and method for sensing the failure of hydraulically-actuated electronically-controlled fuel injector in a combustion engine is disclosed. An electronic controller senses the pressure of the hydraulic actuator fluid prior to injection and samples the pressure throughout a subsequent injection cycle. If the samples show an oscillation in the pressure of the hydraulic actuator fluid, then the injector has fired. Otherwise, the injector has failed.

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