Fuel injector for internal combustion engine, has high pressure channel comprising return valve device that releases flow cross-section when fuel flows to high pressure area and locks cross-section when fuel flows in opposite direction

摘要

The injector (1) has an injection body (2) comprising a fuel high pressure channel (3) that connects a high pressure accumulator with a high pressure area (4) in a fluidic manner, where the fuel loaded with a high pressure is injected from the accumulator into a combustion chamber of an internal combustion engine. The channel has a return valve device that releases a flow cross-section when the fuel flows to the high pressure area and locks the cross-section when the fuel flows in opposite direction.