Knock control system for automotive engines

Details Knock control system for automotive engines Knock control system for automotive engines

1984-12-10

1986-11-11

Wolfe, Jr., Willis R.

Internal-combustion engines

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

F02P 5145

Patent

active

046216022

ABSTRACT:
A knock control system for an automotive engine having a knock sensor for sensing the vibration of the engine, and a knock control unit responsive to an output signal of the knock sensor for retarding the ignition timing. The system is provided with a fail-safe circuit which produces a fail-safe signal for retarding the ignition timing upon the fault of the knock sensor, and an exhaust gas temperature sensor for producing a temperature signal when the exhaust gas temperature exceeds a predetermined temperature. A correcting circuit is provided to be responsive to the temperature signal for reducing the retardation degree determined by the fail-safe signal and a switching circuit further reduces the retardation degree when the engine rpm is greater than a predetermined value.

REFERENCES:
patent: 4320729 (1982-03-01), Sawada et al.
patent: 4433654 (1984-02-01), Yokooku
patent: 4495918 (1985-01-01), Sugiura et al.
patent: 4558674 (1985-12-01), Okado et al.

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