Internal EGR parameter estimating device for internal...

Details Internal EGR parameter estimating device for internal... Internal EGR parameter estimating device for internal...

2006-04-04

2006-04-04

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C123S090150

Reexamination Certificate

active

07021298

ABSTRACT:
An internal EGR parameter estimating device is configured to estimate the internal EGR quantity based on the quantity of blow-by gas that blows by during an overlap period when both the intake valve(s) and the exhaust valve(s) are open. The blow-by gas quantity is calculated based on the intake air pressure and the exhaust gas pressure during the overlap period and the effective cross sectional area opening formed by the intake and exhaust valves. The overlap period is divided into intervals of a prescribed period and the interval cross sectional area opening during each interval is calculated.

REFERENCES:
patent: 6412458 (2002-07-01), Kawasaki et al.
patent: 6840235 (2005-01-01), Koseki et al.
patent: 2001-221105 (2001-08-01), None

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