2results about "Fluid pressure injection control" patented technology

The fuel injector (10.1) includes a housing with a nozzle body having a control fluid inlet, a fuel inlet, and an injection seat; a high-pressure control chamber (32) located within the housing and connected to the control fluid inlet; a fuel chamber (22) located within the housing and extending from the fuel inlet to the injection seat; a nozzle body (10.1) connected to the control fluid inlet; and a fuel chamber (22) located within the housing and extending from the fuel inlet to the injection seat; a control piston (51) located within the housing and adjustable along a longitudinal axis (L), on which a control pressure spring having a closing force toward the injection seat acts; a hydraulic control device for adjusting the control piston along the longitudinal axis; and a nozzle needle located at the end of the control piston facing the injection seat and configured to cooperate with the injection seat to inject fuel into the combustion chamber of an internal combustion engine, the nozzle needle being movable by adjusting the control piston along the longitudinal axis.

A fuel injection device for an engine is disclosed. The fuel injection device may comprise a fuel nozzle with at least one injection metering port, and further a needle element which is movable within the fuel nozzle between a first position in which the needle element prevents fuel flow, and a second position in which the fuel flow is substantially unobstructed. The fuel injection device may also comprise a control chamber located at a base end of the needle element, a body, and a control valve which is arranged within the body and is movable to selectively drain the control chamber, thereby causing the needle element to move between the first and second positions.The fuel injection device may further have an armature located within an armature cavity of the body and selectively excited to move the control valve, and a pressure reduction device located within the body and configured to reduce the pressure of the armature cavity.