Engine control device for reducing the processing time of contro

Details Engine control device for reducing the processing time of contro Engine control device for reducing the processing time of contro

1989-09-19

1991-01-22

Lall, Parshotam S.

Boots, shoes, and leggings

123486, G06F 1548, G06F 1550, F02M 5100

Patent

active

049875442

ABSTRACT:
An engine control device is provided for reducing the retrieving time of control data from sensors at high and low engine speeds. Control parameters from the sensors are converted into memory access parameters to a control map to recover the desired injection amount. The fuel injection quantity is calculated by retrieving fuel injection amounts using the memory access parameters as addresses and performing a four-point interpolation of the memory parameters. A previously retrieved value is used as a reference value to aid the determination of an updated memory access parameter so that the retrieving time can be reduced for high and low engine speeds.

REFERENCES:
patent: 3862404 (1975-01-01), Fiedrich
patent: 4036190 (1977-07-01), Bigliani
patent: 4048965 (1977-09-01), Bianchi et al.
patent: 4081995 (1978-04-01), Griffith et al.
patent: 4352158 (1982-09-01), Date et al.
patent: 4445483 (1984-05-01), Hasegawa
patent: 4733357 (1988-03-01), Abe

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