Patent ID: 6526942
Filing Date: 2003-03-04
Classification: F02M

Abstract:
A common rail type fuel injecting device for an internal combustion engine, comprising:a common rail receiving operation fluid; and an injector having a pressure application chamber and a fuel pressure increasing chamber at both ends of a pressure increasing piston, in which at a start of fuel injection, the operation fluid charged in the common rail flows therefrom into the pressure application chamber to bias the pressure increasing piston and pressurize fuel within the fuel pressure increasing chamber, thereby injecting the fuel, whereas at an end of the fuel injection, the operation fluid within the pressure application chamber flows out therefrom to end pressure application to the fuel within the fuel pressure increasing chamber using the pressure increasing piston, thereby ending the fuel injection, said injector being provided with a passage through which the fuel within the fuel pressure increasing chamber flows out externally and switching means for interrupting communication of the passage at the start of the injection, and establishing the communication of the passage at the end of the injection, said switching means being controlled by the operation fluid that flows into the injector.