초록 ▼

A fuel injector having therein a pressure chamber connected to a nozzle bore. Fuel in the pressure chamber is pressurized by a plunger driven by an engine and is injected from the nozzle bore when the pressure in the pressure chamber exceeds a predetermined pressure. The volume of the pressure chamb

A fuel injector having therein a pressure chamber connected to a nozzle bore. Fuel in the pressure chamber is pressurized by a plunger driven by an engine and is injected from the nozzle bore when the pressure in the pressure chamber exceeds a predetermined pressure. The volume of the pressure chamber is controlled by a piston device actuated by low pressure. The movement of the piston device prevents the injection of fuel. The injection of fuel is stopped by causing the piston device to move relatively freely.

대표청구항 ▼

A fuel injector of an internal combustion engine, comprising: an injector body forming a pressure chamber therein; a spring loaded needle for controlling the opening operation of a nozzle bore to automatically open said nozzle bore and inject fuel in said pressure chamber from said nozzle bore when

A fuel injector of an internal combustion engine, comprising: an injector body forming a pressure chamber therein; a spring loaded needle for controlling the opening operation of a nozzle bore to automatically open said nozzle bore and inject fuel in said pressure chamber from said nozzle bore when pressure in said pressure chamber exceeds a predetermined pressure; pressurizing means for pressurizing the fuel in said pressure chamber; and volume control means for controlling a volume of said pressure chamber and controlled by liquid pressure which is lower than the pressure generated in said pressure chamber when the injection of fuel is carried out, said volume control means increasing said volume to stop the injection of fuel; said volume control means comprising a cylinder, a piston device movable in said cylinder to control said volume, a cylinder chamber defined by said piston device and filled with liquid generating said liquid pressure, and a control device controlling said liquid pressure to reduce said liquid pressure for increasing said volume.