System and method for controlling ignition timing to suppress en

Details System and method for controlling ignition timing to suppress en System and method for controlling ignition timing to suppress en

1991-01-02

1992-10-27

Argenbright, Tony M.

Internal-combustion engines

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

F02P 515

Patent

active

051580578

ABSTRACT:
A system and method for controlling ignition timing for an internal combustion engine to suppress engine knocking in which a periodic pseudo random signal (for example, M-series sequence signal) is superimposed on an ignition signal provided at an ignition timing, and a cross-correlation function between the periodic pseudo random signal .chi. and a knocking signal y is calculated to determine an actual knocking level. The ignition timing is then corrected so that the cross-correlation function coincides with a target value which is defined as a value placed in a vicinity of a knocking limit. The ignition timing for the engine is controlled so as to reach the value in the vicinity of the knocking limit but does not exceed the knocking limit.

REFERENCES:
patent: 4640249 (1987-02-01), Kawamura et al.
patent: 4750103 (1988-06-01), Abo et al.
patent: 4760825 (1988-08-01), Morita
patent: 4893600 (1990-01-01), Holmes
patent: 4966117 (1990-10-01), Kawamura
patent: 5063901 (1991-11-01), Kaneyasu et al.

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