Control system for two cycle direct injection engine and the met

Details Control system for two cycle direct injection engine and the met Control system for two cycle direct injection engine and the met

1996-05-28

1998-10-13

Dolinar, Andrew M.

Internal-combustion engines

Combustion chamber means having fuel injection only

Having a particular relationship between injection and...

12340647, 123435, F02D 4300

Patent

active

058197010

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 is continued 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), Fuji et al.
patent: 5259344 (1993-11-01), Huang et al.
patent: 5333583 (1994-08-01), Matsuura

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