Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1990-10-26
1991-10-08
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Fuel injection system
123418, 123419, F02P 515
Patent
active
050544470
ABSTRACT:
An ignition timing control device for a multicylinder engine comprises a position sensor which generates a crank angle reference position signal indicative of a first and a second reference position of respective cylinders, wherein the second reference position of a particular cylinder is retarded by a predetermined offset with respect to other cylinders. Thus, the control device discriminates the particular cylinder from the ratio of the pulse-width to the pulse repetition period. The length of time between the first or second reference position and the target ignition timing is determined in accordance with the average of two or more preceding periods between the first or second reference position. Thus, the error of the ignition timing, which results from a hunting of the rpm of the engine and which is especially conspicuous with respect to the particular cylinder, is suppressed.
REFERENCES:
patent: 4498438 (1985-02-01), Sato
patent: 4627399 (1986-12-01), Yoshida et al.
patent: 4688535 (1987-08-01), Kuttner et al.
patent: 4747383 (1988-05-01), Kimura et al.
patent: 4951628 (1990-08-01), Matsuoka et al.
patent: 4996958 (1991-03-01), Iwata et al.
Fukui Wataru
Iwata Toshio
Dolinar Andrew M.
Mitsubishi Denki & Kabushiki Kaisha
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