Fuel injection system for internal combustion engine
This patent describes a fuel injection system for an internal combustion engine provided with an intake passage, a cylinder associated with the intake passage and at least one intake valve associated with the cylinder, the fuel injection system including a fuel injector adapted to be disposed upstream of the intake valve. The fuel injector consists of: a housing, a hollow body connected to one end of the housing the hollow body having an end wall formed therein with an injection orifice; a valve member disposed slidably in the body comprising a needle valve of the type that is electromechanically operated; a pintle provided on the valve member for facilitating atomization of liquid fuel, the pintle extending outwardly from the hollow body through the injection orifice with a gap between an outer periphery of the pintle and an inner peripheral surface of the injection orifice to meter fuel to be injected; a sleeve member mounted on the hollow body to cover the injection orifice, the sleeve member defining therein a pintle-receiving space and a plurality of communication apertures adapted to communicate the pintle-receiving space with the intake passage of the engine, the total of the cross-sectional areas of the communication apertures being smaller than the cross-sectional area of the pintle-receiving space.
- Assignee:
- Nippondenso Co., Ltd., Kariya
- Patent Number(s):
- US 4773374
- OSTI ID:
- 6888803
- Resource Relation:
- Patent File Date: Filed date 29 Sep 1986
- Country of Publication:
- United States
- Language:
- English
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