Fuel injection controller for an internal combustion engine

Details Fuel injection controller for an internal combustion engine Fuel injection controller for an internal combustion engine

1989-05-30

1990-05-29

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123494, 731182, 36443105, F02D 4118, F02D 4128

Patent

active

049286552

ABSTRACT:
A fuel control apparatus for an engine uses an N-bit low-resolution A/D converter to convert the analog output of an air intake pressure sensor. The N-bit output of the converter is multiplied by a prescribed constant to obtain a signal having at least (N+1) bits. The (N+1) bit signal is subjected to low-pass digital filtering and is used by a controller to calculate the pulse width to be applied to a fuel injector. A high resolution can be obtained using an inexpensive N-bit A/D converter.

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patent: 4688425 (1987-08-01), Kanehara et al.
patent: 4747387 (1988-05-01), Takao et al.
patent: 4757793 (1988-07-01), Shimomura et al.
patent: 4807151 (1989-02-01), Citron
patent: 4807581 (1989-02-01), Nishikawa et al.
patent: 4844042 (1989-07-01), Osano
patent: 4848301 (1989-07-01), Hashimoto et al.
Digital Signal Processing, Dr. Shinji Ozawa, Jikkyo Publishing Co., pp. 103-109, Jul. 10, 1979.

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