Method of and apparatus for generating cylinder discriminating s

Details Method of and apparatus for generating cylinder discriminating s Method of and apparatus for generating cylinder discriminating s

1988-07-21

1990-04-17

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123612, 123617, F02P 100, F02P 504

Patent

active

049170643

ABSTRACT:
A method of and apparatus for generating a cylinder discriminating signal in a distributor for an internal combustion engine are disclosed. The cylinder discriminating signal is generated by a combination of a cylinder discriminating reluctor installed on a centrifugal spark advance member and a cylinder discriminating sensor attached to a vacuum spark advance plate to detect approach and passage of the cylinder discriminating reluctor. The width of the cylinder discriminating reluctor in the direction of rotation is set so as to correspond to an angle smaller than the entire range of spark advance of the ignition timing signal. The cylinder discriminating signal is advanced by both centrifugal spark advance and vacuum spark advance so as to overlap the ignition timing signal despite having a relatively narrow width. Since the width of the cylinder discriminating signal is reduced, it is possible to improve the control tolerances of the associated microcomputer.

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