6results 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 injector (1) is disclosed comprising a needle (15) a fuel supply port (17) fluidly connected to a fuel cavity (13) and a control valve arrangement (3) comprising a control valve (4) fluidly connected to the fuel cavity (13). The control valve arrangement (3) comprises an armature assembly (6) connected to the control valve (4) via a valve control portion (6') of the armature assembly (6). The control valve arrangement (3) comprises an armature actuator (7) configured to move the armature assembly (6) to cause a lift of the needle (15) from a valve seat (12) and a movement limiting assembly (9, 9', 9'', 9''') configured to limit the movement of the valve control portion (6') upon activation. The movement limiting assembly (9, 9', 9'', 9''') is configured to be activated by changing the polarity of the electricity supplied to the armature actuator (7). The present disclosure further relates to an internal combustion engine (40) and a vehicle (2).

A gaseous fuel injector comprising a gas delivery chamber 48 and housing body 22 defining a working fluid chamber 34 and needle guide bore 24. A valve needle 12 is movable within the guide bore, where

The invention relates to a fuel injection valve (10.1), comprising: a housing which has a control fluid inlet, a fuel inlet and a nozzle body having an injection valve seat; a high-pressure control chamber (32) which is arranged in the housing and is connected to the control fluid inlet; a fuel chamber (22) which is arranged in the housing and extends from the fuel inlet to the injection valve seat; a control piston (51) which is arranged in the housing in a displaceable manner along a longitudinal axis (L) and to a which a closing force directed towards the injection valve seat can be applied by a control pressure spring; a hydraulic control device for controlling the displacement of the control piston along the longitudinal axis; a nozzle needle which is arranged at an end of the control piston facing the injection valve seat and which is designed to interact with the injection valve seat in order to inject fuel into the combustion chamber of the internal combustion engine, wherein the nozzle needle can be moved by displacement of 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.

A fuel injector of a fuel injection system for delivering gaseous fuel to an internal combustion engine, the fuel injector comprising a working fluid chamber (34), a gas delivery chamber (48) and a needle guide bore (24) extending from the working fluid chamber (34) to the gas delivery chamber (48), wherein the gas delivery chamber (48) communicates with a fuel injector outlet (20) for delivering the gaseous fuel to the internal combustion engine. A valve needle (12) is movable within the needle bore (24) along a needle axis to open and close the outlet (20), wherein a gap is defined between an outer surface of the valve needle (12) and an inner surface of the needle bore (24). A biasing spring (50) acts on the valve needle (12) to urge the valve needle (12) to close the fuel injector outlet (20). A spring abutment member (54; 72) is provided for one end of the biasing spring (50). An annular seal (62, 90) is cooperable with the spring abutment member (54; 72) so that a force of the biasing spring (50) is transmitted to the annular seal (62; 90) through the spring abutment member (54; 72), to urge the annular seal into engagement with an outer surface of the valve needle (12).