Measuring and testing – Internal combustion engine or related engine system or... – Monitoring intake air system
Reexamination Certificate
2007-08-21
2009-12-15
McCall, Eric S (Department: 2855)
Measuring and testing
Internal combustion engine or related engine system or...
Monitoring intake air system
Reexamination Certificate
active
07631550
ABSTRACT:
A computer calculates an estimated cylinder-intake-air amount based on outputs from an airflow meter and a throttle position sensor, and then calculates a reference cylinder-intake-air amount based on an air-fuel ratio in an exhaust gas and fuel injection amount. An error of the estimated cylinder-intake-air amount is calculated by comparing the reference cylinder-intake-air amount with an estimated cylinder-intake-air amount base value. The error is low-pass filtered. The estimated cylinder-intake-air amount base value is corrected to obtain the final estimated cylinder-intake-air amount.
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Office Action mailed Jul. 20, 2009 in co-pending U.S. Appl. No. 12/213,932.
DENSO Corporation
McCall Eric S
Nixon & Vanderhye P.C.
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