Internal-combustion engines – Combustion chamber means having fuel injection only – Having a particular relationship between injection and...
Patent
1998-05-20
1999-11-30
Dolinar, Andrew M.
Internal-combustion engines
Combustion chamber means having fuel injection only
Having a particular relationship between injection and...
123481, 123487, 123494, F02D 4300
Patent
active
059923741
ABSTRACT:
Disclosed is a control system and method of a two cycle direct fuel injection engine capable of smoothly suspending combustions in the cylinder during light load operation of the engine. Based on a map parameterizing the engine speed and the target engine load, it is judged whether or not, when the engine load is in the light load condition, the target engine load is located in a suspending area in which misfires tend to occur. If the target engine load is not in the suspending area, since there is no possibility of misfire, the normal combustion cycle continues to operate. On the other hand, if the target engine load enters into the suspending area, the control system instructs the fuel injection and ignition apparatuses so as to suspend fuel injection and spark ignition with a frequency determined according to the magnitude of the engine load. The frequency is determined by a predetermined formula such that it is reduced as the engine load becomes high and is increased as the engine load becomes low.
REFERENCES:
patent: 4991558 (1991-02-01), Daly et al.
patent: 5036801 (1991-08-01), Imajou
patent: 5174261 (1992-12-01), Fujii et al.
patent: 5259344 (1993-11-01), Huang et al.
Dolinar Andrew M.
Fuji Jukogyo Kabushiki Kaisha
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