Internal-combustion engines – Combustion chamber means combined with air-fuel mixture...
Patent
1984-10-03
1986-09-09
Cox, Ronald B.
Internal-combustion engines
Combustion chamber means combined with air-fuel mixture...
F02P 504
Patent
active
046102329
ABSTRACT:
An ignition timing control apparatus for an internal combustion engine capable of using as a fuel a regular (low-octane) gasoline, a premium (high-octane) gasoline. The engine produces knocks when the ignition timing is advanced beyond a reference ignition timing determined as a function of the type of gasoline being used. This advance ignition timing control apparatus detects the knocks, and provides as an output a signal according to the occurrence rate of the knocks which essentially indicates the type of gasoline in use. By means of this signal, this ignition timing control apparatus changes over one reference ignition timing adapted for premium gasoline to the other reference ignition timing adapted for regular gasoline to retard the current ignition timing. At the same time, in a predetermined operating region of the engine, the ignition timing can be fixed in the retard or advance mode angle, whereby a desirable ignition timing for an engine is provided so as to improve the performance of the engine.
REFERENCES:
patent: 3718126 (1973-02-01), Oishi et al.
patent: 3822583 (1974-07-01), Keller et al.
patent: 4351281 (1982-09-01), Geiger
patent: 4440129 (1984-04-01), Iwata
patent: 4444172 (1984-04-01), Sellmaier
Cox Ronald B.
Mitsubishi Denki & Kabushiki Kaisha
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