Fuel supply system and method therefor

Abstract

Abstract PURPOSE:To enable fuel injection rate pattern to be optimumly controlled, by communicating a casing slidably accommodating a pump member through a return passage to a fuel tank, and operating a regulating valve provided in the return passage synchronously with a pumping action. CONSTITUTION:In a fuel injection system designed to supply fuel pressurized in a pump chamber 5 through passages 9 and 7 to a fuel injection nozzle by axially reciprocating a plunger 1 provided integrally with a face cam 3 simultaneously with rotation of the plunger 1, there is provided at an end of a casing 2 a return passage 10 for communicating through a block 11 to a fuel tank. A pressure chamber 12 accommodating at its upper portion an elastic member 17 to be elastically deformed by conducting current is provided above the block 11, and a valve hole 13 intersecting with the return passage 10 is formed at a bottom of the pressure chamber 12. A piston 15 as a regulating valve having a through-hole 16 is accommodated in the valve hole 13 with a spring 14 interposed therein, and fuel injection rate pattern is controlled by variable action of the piston 15.

Inventors

• 👤 Shinji Ikeda
• 👤 慎治 池田

Bibliographic Details