Method for firing spark plugs

Details Method for firing spark plugs Method for firing spark plugs

1991-05-10

1992-03-31

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Fuel injection system

123417, 123414, 36443105, F02P 500

Patent

active

050998110

ABSTRACT:
A method for firing a spark plug in an engine which employs a simulated high data rate signal. The simulated high data rate signal is generated by a preselected number of gaps in a flywheel within a predetermined time segment of each cylinder event time called the spark event. A sensor generates the simulated high data rate signal as the gaps rotate past it. Data pulses are generated and stored within the spark event. In the case of distributorless ignition systems, the spark plug to be fired is identified. In one embodiment, a widened gap in the flywheel is used to perform this identification. The occurrence time of the leaading and trailing edges of the data pulses are received and stored. The rate of rotation including velocity and possibly acceleration is calculated and stored upon the occurence of each pulse. The spark firing time within the spark event is calculated and stored upon the occurrence of each pulse. Finally, the spark plug is fired once within the spark event.

REFERENCES:
patent: 4889095 (1989-12-01), Sogawa
patent: 4895120 (1990-01-01), Tobinaga et al.
patent: 4924831 (1990-05-01), Pitco et al.
patent: 4930477 (1990-06-01), Nanyoshi et al.
patent: 4960093 (1990-10-01), McDougal et al.
patent: 5009209 (1991-04-01), Okuda et al.

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