Fuel control apparatus for an internal combustion engine
A fuel control apparatus is described for an internal combustion engine comprising: air-fuel mixture supplying means, provided in an intake pipe of a cylinder of the engine, for atomizing fuel supplied thereto and mixing the atomized fuel with air drawn into the intake pipe so as to produce an air-fuel mixture to be delivered to the cylinder to be burned therein; auxiliary air supplying means, coupled to the intake pipe in the vicinity of an intake port of the cylinder, for supplying additional air into the intake pipe independently of the air drawn into the intake pipe so that, during a suction stroke of the cylinder. The additional air is initially introduced into the cylinder followed by the introduction of the air-fuel mixture delivered by the air-fuel mixture supplying means; air-fuel ratio sensing means, coupled to an exhaust port of the cylinder, for monitoring the air-fuel ratio of the air-fuel mixture burned in the engine cylinder; and control means, coupled to the air-fuel ratio sensing means and responsive to operational and load conditions of the engine, for generating control signals in accordance with which the air-fuel mixture supplying means adjusts the quantity of fuel to be atomized. This is done to cause the air-fuel ratio of the air-fuel mixture burned in the cylinder to correspond to a predetermined reference value of the air-fuel ratio on the basis of the operational condition of the engine and for controlling the auxiliary air supplying means in accordance with the load condition required of the engine.
- Assignee:
- Hitachi, Ltd., Tokyo
- Patent Number(s):
- US 4643151
- OSTI ID:
- 7083857
- Resource Relation:
- Patent File Date: Filed date 27 Dec 1985
- Country of Publication:
- United States
- Language:
- English
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