Ignition timing control system for an automotive engine

Details Ignition timing control system for an automotive engine Ignition timing control system for an automotive engine

1989-05-26

1990-05-29

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Fuel injection system

123417, F02P 515

Patent

active

049286498

ABSTRACT:
A disk is secured to a crankshaft of an engine, and two projections are provided on a periphery of the disk. A sensor is provided for sensing the projections. An angle between two projections is stored in a memory in a form of K.multidot.2.sup.n, where K is resolution of the system and n is a natural member. Time interval between the projections is calculated as a binary number. The time interval is shifted by n times, thereby producing a quotient signal representing the quotient of division of the time interval by the angle. An ignition timing is calculated based on the quotient signal.

REFERENCES:
patent: 4267810 (1981-05-01), Wesemeyer et al.
patent: 4355613 (1982-10-01), Rode et al.
patent: 4426974 (1984-01-01), Nash
patent: 4499544 (1985-02-01), Ohba et al.
patent: 4726338 (1988-02-01), Decker et al.
patent: 4760827 (1988-08-01), Schreiber et al.
patent: 4797827 (1989-01-01), Cockerham

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