Knock control system for internal combustion engines

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

1986-04-10

1987-12-08

Cox, Ronald B.

Internal-combustion engines

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

F02P 504

Patent

active

047112131

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. The knock discrimination level is corrected such that a probability that the maximum value of the knock sensor output signal will exceed the knock discrimination level is greater in a knock control range than outside of a knock control range.

REFERENCES:
patent: 4513716 (1985-04-01), Haraguchi
patent: 4607602 (1986-08-01), Komurasaki
patent: 4610232 (1986-09-01), Iwata

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