Fuel combustion control apparatus for an engine

Details Fuel combustion control apparatus for an engine Fuel combustion control apparatus for an engine

1988-10-07

1990-02-27

Argenbright, Tony M.

Internal-combustion engines

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

123417, F02P 515

Patent

active

049036637

ABSTRACT:
In an engine fuel combustion control apparatus for determining ignition advance angles on the basis of a regular map or a highoctane map, the current advance angle on the regular map is incremented as long as knocking is absent within a predetermined engine speed range, and the regular map is switched to the highoctane map only when the advance angle is equal to or larger than the reference map switching line and the maximum highoctane map retard angle simultaneously, in order to prevent hunting between the two maps. Further, the current advance angle on the highoctane map is decremented when knocking is present and the highoctane map is switched to the regular map when the advance angle is smaller than the maximum highoctane map retard angle. The map used immediately before an engine stop is used in the succeeding engine start, in order to prevent knocking or to obtain a high engine output at engine restart.

REFERENCES:
patent: 4586475 (1986-05-01), Takahashi et al.
patent: 4610232 (1986-09-01), Iwata
patent: 4612901 (1986-09-01), Iwata et al.
patent: 4630584 (1986-12-01), Higashiyama et al.

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