Fuel injection control apparatus for an internal combustion engi

Details Fuel injection control apparatus for an internal combustion engi Fuel injection control apparatus for an internal combustion engi

1998-11-03

2000-08-29

Yuen, Henry C.

Internal-combustion engines

Charge forming device

Fuel injection system

123494, F02M 5100

Patent

active

061092444

ABSTRACT:
A fuel injection control apparatus which infers fuel temperature from cooling water temperature and intake air temperature. From these inferred temperatures, a correction coefficient of the air-fuel ratio is found from the inferred fuel temperature and the intake manifold pressure by using data stored in a map. The map is set up so that a characteristic thereof shows that, the higher the inferred temperature of fuel, the larger the correction coefficient of the air-fuel ratio and, thus, the longer the fuel injection time. Subsequently, an ineffective injection time TV is corrected in accordance with the inferred fuel temperature. A fuel injection time TI is then computed from a basic injection time TP, a representative correction coefficient Ftotal representing all correction coefficients including the correction coefficient of the air-fuel ratio, and the ineffective injection time TV.

REFERENCES:
patent: 4082066 (1978-04-01), Long
patent: 5865158 (1999-02-01), Cleveland et al.
patent: 5902346 (1999-05-01), Cullen et al.

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