A fuel injector for use in delivering fuel to an internal combustion engine comprises a nozzle having a valve needle which is moveable with respect to a valve needle seating through a range of movement between a fully-closed position and a fully-open posit...

The invention has an object for improving response of a fuel injection device. A flow-in recessed portion (72a) and a flow-out recessed portion (74a) are formed at a press-contacting surface of a floating plate (70), which is movably accommodated in a pres...

A throttle device (42) is arranged between an actuator pressure chamber (35) and a nozzle needle control chamber (46). When the nozzle needle control chamber is emptied, the throttle allows a smaller through-flow from the nozzle needle control chamber into...

The pressure storage device has tubular basic body (2) with a wall (3) bounding a storage chamber (4) inside the body for the medium to be stored and at least one bore (5) through the wall for carrying away the medium. At least one curved bulge (6) into th...

An object of the present invention is to obtain a consistently stable needle lift damping effect in an injector 8b for fuel injection. In an injector 8b that relieves fuel pressure inside a pressure control chamber 37 and lifts a needle valve 36, there are...

The control valve (58) is located on the fuel injection valve (12). A storage chamber (56) is provided at the fuel injection valve, to act as a relief chamber. With the valve (58) open, this allows fuel to be stored under controlled pressure.

The supply device has a pressure tank (2) for a fluid with a pump (4) for transporting the fluid into the tank and a connection arrangement (3) by which the fluid from the pump can be delivered to the tank. The connection arrangement has two separate press...

An actuator arrangement comprising a piezoelectric element (22) formed from a piezoelectric material, a first end of the piezoelectric element (22) cooperating with an input piston member (24) slidable within a bore (26). A surface associated with the inpu...

A piezoelectrically actuable fuel injector comprising an accumulator volume (36) within which a piezoelectric stack (40) is arranged, the accumulator volume (36) being arranged to receive fuel from a source of pressurised fuel, in use. The piezoelectric st...