Patent ID: 6550319
Filing Date: 2003-04-22
Classification: F02D,Y02T

Abstract:
A method of diagnosing faults in an air assisted fuel injector system including an air assisted fuel injector for an internal combustion engine having electronic throttle control comprising:operating the air assisted injector system at a first rate of airflow; generating a first value indicative of the airflow entering an intake of the electronic throttle of the engine at idle speed with the air assisted injector system operating at said first rate of airflow; operating the air assisted injector system at a second rate of airflow corresponding to the air assisted fuel injector being off; generating a second value indicative of the airflow entering the intake of the electronic throttle of the engine at idle speed with the air assisted injector system operating at said second rate of airflow; and generating an error signal as a function of said first and second values.