Apparatus and method for controlling fuel injection in internal

Details Apparatus and method for controlling fuel injection in internal Apparatus and method for controlling fuel injection in internal

1997-12-17

1998-12-15

Solis, Erick R.

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

123698, 123480, F02D 4140

Patent

active

058485805

ABSTRACT:
An improved apparatus and method for controlling fuel injection in an internal combustion engine. An EGR passage is connected to an intake duct for supplying exhaust gas, which has been discharged from a combustion chamber, to the intake duct. An EGR valve is located in the EGR passage to adjust the flow rate of the exhaust gas supplied to the intake duct from the EGR passage. An acceleration pedal adjusts the flow rate of the air supplied to the combustion chamber. An ECU computes the amount of fuel to be injected from a fuel injection valve based on the depression degree of the acceleration pedal and the engine speed when the exhaust gas is supplied to the intake duct from the EGR passage. The ECU computes the amount of fuel to be injected from the fuel injection valve based on the intake pressure and the engine speed when the exhaust gas is not supplied to the intake duct from the EGR passage. The ECU controls the fuel injection valve based on the computed fuel injection amount. This prevents intake air fluctuations caused by exhaust gas recirculation from affecting the computed fuel injection amount.

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patent: 4553518 (1985-11-01), Takao et al.
patent: 4599694 (1986-07-01), Aposchanski et al.
patent: 4664090 (1987-05-01), Kabasin
patent: 5002031 (1991-03-01), Kako

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