Apparatus for controlling ignition timing for internal combustio

Details Apparatus for controlling ignition timing for internal combustio Apparatus for controlling ignition timing for internal combustio

1985-03-18

1986-12-02

Argenbright, Tony M.

Internal-combustion engines

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

F02P 515

Patent

active

046256920

ABSTRACT:
An angle of an ignition timing for a specific cylinder is gradually advanced. A comparison is made between the previous output of a knock detection circuit for the cylinder having its angle advanced and the present output thereof by a comparator. The comparator evaluates an occurrence of a knock when an output signal therefrom changes drastically. The signal from the comparator rewrites the knock evaluation reference value in each cylinder written in the memory. When an output from the knock sensor is larger than that of the memory, an ignition timing retard angle signal is output from the comparator. As a result, the apparatus of the present invention can control ignition timing without errors due to the deterioration with age or manufacturing errors, as it can correct knocking detection sensibility of the apparatus.

REFERENCES:
patent: 4268910 (1981-05-01), Omori et al.
patent: 4425891 (1984-01-01), Kashimura et al.
patent: 4471736 (1984-09-01), Yoshida et al.
patent: 4513718 (1985-04-01), Ishii et al.
patent: 4527525 (1985-07-01), Mauermann et al.

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