Ignition timing controlling device for an internal combustion en

Details Ignition timing controlling device for an internal combustion en Ignition timing controlling device for an internal combustion en

1988-01-13

1989-10-24

Dolinar, Andrew M.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

123422, F02P 5145

Patent

active

048754501

ABSTRACT:
An ignition timing controlling device for an internal combustion engine includes a reference position signal generating circuit for generating a reference position signal each time the rotational angular position of a crank of an internal combustion engine reaches a reference angular position. A pressure indicating signal generating circuit generates a pressure indicating signal indicative of an internal pressure of a combustion chamber of the engine. A peak detecting circuit generates a pressure indicating peak value, a position signal indicative of a maximum peak value and a position of the pressure indicating signal after generation of a reference position signal until generation of a next reference position signal. An ignition instructing circuit is provided for instructing ignition at an ignition angle corresponding to the pressure indicating peak value and the position signal. The ignition instructing circuit delivers an ignition instruction at an ignition timing depending upon a history of change of the pressure indicating peak position while the rate of change of the pressure indicating peak value is low. The ignition instructing circuit delivers an ignition instruction at an ignition timing independent of the pressure indicating peak position when the engine is operating at a low speed and the rate of change of the pressure indicating peak value is high.

REFERENCES:
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patent: 4606312 (1986-08-01), Nakano et al.
patent: 4694799 (1987-09-01), Yagi et al.
patent: 4709678 (1987-12-01), Yagi et al.
patent: 4741310 (1988-05-01), Yagi et al.
patent: 4745902 (1988-05-01), Yagi et al.
patent: 4748952 (1988-06-01), Yagi et al.

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