Method for determining amount of fuel injection in engine...

Details Method for determining amount of fuel injection in engine... Method for determining amount of fuel injection in engine...

2006-08-01

2006-08-01

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C073S118040, C123S494000

Reexamination Certificate

active

07082929

ABSTRACT:
Determining a fuel injection amount of an engine system having a crank sensor and airflow sensor includes computing a speed change of engine revolutions per minute and computing a speed change of an intake-air amount. Comparing the speed change of the engine rpm and the speed change of the intake-air amount with reference values, and if vibration and reverse-flow are determined to occur in the intake manifold, correcting the intake-air amount into the present engine speed and computing the present intake-air amount. The fuel injection amount is then determined by using the above computed intake-air amount. This improves the accuracy of determining the credible range of the airflow sensor and increases the range using the airflow sensor.

REFERENCES:
patent: 3975951 (1976-08-01), Kohama et al.
patent: 4404846 (1983-09-01), Yamauchi et al.
patent: 4719890 (1988-01-01), Wataya et al.
patent: 4841938 (1989-06-01), Weibler et al.
patent: 5137001 (1992-08-01), Taniguchi

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