Pressure/temperature calculation apparatus

Details Pressure/temperature calculation apparatus Pressure/temperature calculation apparatus

2005-04-12

2005-04-12

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

Reexamination Certificate

active

06879904

ABSTRACT:
In an internal combustion engine, at least one of the pressure and temperature in an intake passage downstream of a throttle valve is calculated using an expression of a relationship established based on the law of conservation of mass among an amount of air passing the throttle valve and flowing into the intake passage, an amount of exhaust gas passing an exhaust gas flow control valve and flowing into the intake passage, and an amount of gas flowing from the intake passage into a cylinder of the engine, and an expression of a relationship established based on the law of conservation of energy among an amount of energy of the air passing the throttle valve and flowing into the intake passage, an amount of energy of the exhaust gas passing the exhaust gas flow control valve and flowing into the intake passage, and an amount of energy of the gas flowing from the intake passage into the cylinder of the engine.

REFERENCES:
patent: 4843553 (1989-06-01), Ohata
patent: 4860707 (1989-08-01), Ohata
patent: 5010866 (1991-04-01), Ohata
patent: A 2001-41095 (2001-02-01), None
patent: A 2002-147279 (2002-05-01), None
patent: A 2002-201998 (2002-07-01), None
patent: WO 03033897 (2003-04-01), None

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