초록 ▼

An accumulator fuel injection system for automotive vehicles is provided which includes an accumulating chamber storing therein fuel under a given pressure, a plurality of fuel injectors communicating with the accumulating chamber for injecting the fuel stored therein into engine cylinders of an eng

An accumulator fuel injection system for automotive vehicles is provided which includes an accumulating chamber storing therein fuel under a given pressure, a plurality of fuel injectors communicating with the accumulating chamber for injecting the fuel stored therein into engine cylinders of an engine, and a pressure regulator for regulating the pressure of fuel flowing through a drain passage from the accumulating chamber to a fuel tank. When a throttle valve is fully closed during a high-load engine operation, the fuel regulator opens the drain passage to decrease the pressure of fuel within the accumulating chamber to a target pressure level speedily. This allows an actual fuel injection pressure to follow a change in the target pressure level quickly according to an engine operating condition when the throttle valve is reopened.

대표청구항 ▼

[ What is claimed is:] [1.] An accumulator fuel injection apparatus comprising:a first accumulating chamber storing therein fuel under a first pressure;a fuel injector communicating with the first accumulating chamber;a control circuit providing a control signal to the fuel injector to inject part o

[ What is claimed is:] [1.] An accumulator fuel injection apparatus comprising:a first accumulating chamber storing therein fuel under a first pressure;a fuel injector communicating with the first accumulating chamber;a control circuit providing a control signal to the fuel injector to inject part of the fuel stored within the first accumulating chamber into an engine;a second accumulating chamber;a drain passage communicating the first accumulating chamber with the second accumulating chamber for draining the fuel from the first accumulating chamber to the second accumulating chamber;valve means for selectively establishing and blocking communication between the first accumulating chamber and the second accumulating chamber; andpressure regulating means for regulating a pressure of the fuel stored within the second accumulating chamber to a second pressure being smaller than the first pressure.