Method of and apparatus for controlling ignition timing in inter

Details Method of and apparatus for controlling ignition timing in inter Method of and apparatus for controlling ignition timing in inter

1987-07-17

1988-12-13

Dolinar, Andrew M.

Internal-combustion engines

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

123422, F02P 515

Patent

active

047902817

ABSTRACT:
A method of and an apparatus for controlling ignition timing in an internal combustion engine, which determines the ignition timing on the basis of the engine speed and load state, discriminates whether or not knocking has occurred on the basis of the output of a knocking detection circuit, retards the so-determined ignition timing by a predetermined amount when knocking occurs, and advances the ignition timing by a predetermined amount after knocking has been avoided. The maximum amount of retardation and advancement carried out upon occurrence of knocking is varied depending on one or more engine operating conditions, enabling the ignition timing to be controlled to near MBT and the engine output to be the maximum possible. The said engine operating condition or conditions include an engine speed in the case of compensation in the direction of ignition retardation and include an engine speed and a load state in the case of compensation in the direction of ignition advance.

REFERENCES:
patent: 4351281 (1982-09-01), Geiger et al.
patent: 4426975 (1984-01-01), Suzuki et al.
patent: 4541382 (1985-09-01), Hosoe et al.
patent: 4549514 (1985-10-01), Abe et al.

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