Knock control system for internal combustion engines

Details Knock control system for internal combustion engines Knock control system for internal combustion engines

1986-04-17

1987-10-13

Wolfe, Jr., Willis R.

Internal-combustion engines

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

123435, 73 35, F02P 514

Patent

active

046991069

ABSTRACT:
A knock control system for an internal combustion engine has a knock discrimination level. If an output signal from a knock sensor is higher than the knock discrimination level, then the knock control system determines that the engine is subjected to knock and retards the ignition timing. If the knock sensor output signal is lower than the knock discrimination level, i.e., if no knock or detonation is detected over a prescribed period of time, then the ignition timing is advanced. At least two corrective levels are established for comparison with a knock discrimination level, and occurrences in which the maximum value of the output signal from the knock sensor exceeds the corrective levels. The knock discrimination level is automatically corrected dependent on the counts of such occurrences.

REFERENCES:
patent: 4354378 (1982-10-01), Oshiage et al.
patent: 4356551 (1982-10-01), Iwase et al.
patent: 4481925 (1984-11-01), Karav et al.
patent: 4565171 (1986-01-01), Sugiura et al.
patent: 4583175 (1986-04-01), Abe et al.
patent: 4617895 (1986-10-01), Sakakibara et al.

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