Method for controlling ignition timing of an internal combustion

Details Method for controlling ignition timing of an internal combustion Method for controlling ignition timing of an internal combustion

1990-05-31

1991-03-19

Dolinar, Andrew M.

Internal-combustion engines

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

F02P 515

Patent

active

050001493

ABSTRACT:
An ignition controlling system has a first memory storing a plurality of upper limit ignition timings and lower limit ignition timings each of which is a maximum advance timing for high-octane gasoline and low-octane gasoline without causing knocking, and storing a plurality of maximum advance ignition timings. A second memory stores a coefficient for determining a dividing point between said upper and lower limit ignition timings. The coefficient is rewritten in accordance with occurrence of the knocking of the engine. A learning ignition timing is calculated from the upper and lower limit ignition timings and the coefficient derived from the first and second memory.

REFERENCES:
patent: 4630584 (1986-12-01), Higashiyama et al.
patent: 4715342 (1987-12-01), Nagai
patent: 4736723 (1988-04-01), Nagai
patent: 4934327 (1990-06-01), Hidaka

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