Intake-air measuring apparatus for internal combustion engine

Details Intake-air measuring apparatus for internal combustion engine Intake-air measuring apparatus for internal combustion engine

2005-07-26

2005-07-26

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Engine speed regulator

C073S118040

Reexamination Certificate

active

06920863

ABSTRACT:
An intake-air measuring apparatus for an internal combustion engine, enabling to calculate a mass of intake-air inducted into the internal combustion engine, with a small map but at high accuracy, comprises: a means for measuring out an air mass passing through a throttle valve based on pressure in up/down streams of the throttle valve and temperature in the upstream of the throttle valve; a means for calculating an air mass passing through the intake valve based on a rotation speed of the internal combustion engine, an open/close timing of the intake valve and an opening of an EGR valve; and a means for selecting either one of the air mass passing through the throttle valve or the air mass passing through the intake valve, depending upon operation condition of the internal combustion engine, thereby outputting the selected air mass as inducted air mass into the internal combustion engine.

REFERENCES:
patent: 5889205 (1999-03-01), Treinies et al.
patent: 5974870 (1999-11-01), Treinies et al.
patent: 6741924 (2004-05-01), Iwasaki et al.
patent: 301144 (1995-11-01), None

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