Spark timing system for spark ignition internal combustion engin

Details Spark timing system for spark ignition internal combustion engin Spark timing system for spark ignition internal combustion engin

1981-01-23

1983-05-10

Argenbright, Tony M.

Internal-combustion engines

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

123427, F02P 504

Patent

active

043824293

ABSTRACT:
A spark timing adjusting circuit receives a basic spark timing signal from a spark timing determining circuit and regulates the spark timing according to a knocking signal from a knocking detector. A speed changing circuit serves to increase the rate of advance of the spark timing after the spark timing has been retarded when the operational state of the engine is in a first predetermined range corresponding to a first speed range in which all the engine speeds are lower than a first predetermined value. The speed changing circuit may include a circuit which decreases the rate of retard of the spark timing when the operational state of the engine is in a second predetermined range corresponding to a second speed range in which all the engine speeds are higher than a second predetermined value which is higher than the first predetermined value, thereby avoiding rapid retardation of the spark timing. Alternatively, the first and second predetermined ranges of the operational state of the engine may be defined with respect to intake manifold vacuum, throttle valve opening or intake air amount to the engine.

REFERENCES:
patent: 4002155 (1977-01-01), Harned et al.
patent: 4100895 (1978-07-01), Hattori et al.
patent: 4133475 (1979-01-01), Harned et al.
patent: 4211194 (1980-07-01), Hattori et al.
patent: 4242995 (1981-01-01), Schramm et al.
patent: 4282841 (1981-08-01), Takagi et al.

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