摘要:
An object is to suppress cavitation generated at a distal end portion of a seat face when a valve body and a seat portion collide with each other. In a relief valve of a fuel pump, an intersection between the seat face and a flow channel hole is formed at a position more distant than the seat portion formed of the valve body in a valve closing state and the seat face in order to suppress generation of cavitation bubbles when the valve body improves and releases high-pressure fuel.
摘要:
A valve unit (10) for controlling the supply and delivery of fuel to and from a compression chamber (7) of a high-pressure piston pump (1) has a valve body (18); a first check valve (19) having a first valve seat (21) which extends along a first axis (Al), is formed in the valve body (18), and can be connected to the compression chamber (7) and to a fuel delivery duct (9); and a second check valve (20) having a second valve seat (22) which extends along a second axis (A2), is formed in the valve body (18), and can be connected to the compression chamber (7) and to a fuel supply duct (8).
摘要:
An actuator assembly of the digital inlet valve for a fuel pump adapted to cooperate with an inlet valve member, the actuator assembly comprising an actuator body in which is fixed a coil, a cover fixedly closing the body and, a magnetic core arranged in a core guiding bore provided in the actuator body. The magnetic core is slidable along a main axis (X) in order, in use, to close an air gap (G142) under the influences of a first compression spring, and of a magnetic field, the core cooperating with the valve member. The air gap is calculated by the formula G142 = A144 - (B146 + T196) where, A144 is an axial dimension intrinsic to the body and, B146 is an axial dimension intrinsic to the cover and, T196 is an axial dimension intrinsic to the magnetic core.
摘要:
The invention relates to a pressure control valve (10), comprising a housing (20), which has an inlet opening (16) and an outflow opening (18); a valve pin (12), which is guided in the housing (20) and which has an actuating element (12b); and a sealing element (42, 42') at an end of the actuating element (12), which sealing element is designed to close a valve seat (14) when the valve pin (12) is moved, such that a fluid flow between the inlet opening (16) and the outflow opening (18) is interrupted. The valve seat (14) and an axial guide (26) of the actuating element (12b) are provided by a one-piece valve body (20b).
摘要:
Embodiments of injectors configured for adaptively injecting multiple different fuels and coolants into a combustion chamber, and for igniting the different fuels, are disclosed herein. An injector according to one embodiment includes a body having a first end portion and a second end portion. The injector further includes a first flow channel (124) extending through the body, and a second flow channel (133) extending through the body that is separate from the first flow channel (124) and electrically isolated from the first flow channel (124). The first flow channel (124) is configured to receive a first fuel, and the second flow channel (133) is configured to receive at least one of a second fuel and a coolant. The injector further comprises a valve (121) carried by the body that is movable between a closed position and an open position to introduce at least one of the second fuel and the coolant into a combustion chamber.
摘要:
The present invention relates to a valve for a pump for delivering fuel, having a closing element which is mounted in a valve body so as to be movable along an axis, wherein the closing element is designed to close off a duct of the pump, wherein an actuator is provided which is operatively connected to the closing element, wherein the closing element has a first contact surface, wherein the actuator has a second contact surface, wherein the closing element and the actuator are in contact with one another via the contact surfaces, the valve being characterized in that the contact surfaces are at least partially in the form of spherical surfaces.
摘要:
The invention relates to a pressure control valve for a fuel injection system of an internal combustion engine, in particular a Common-Rail injection system, comprising a valve housing (1) having a bore (2), in which a valve closing element (3) being integrally designed or designed in a plurality of parts and a spring (4) are accommodated, wherein the spring force of the spring (4) is admitted to the valve closing element (3) in the direction of a valve seat (5). According to the invention, the spring (4) is supported on the valve closing element (3) on the one hand and on a spring plate (6) on the other hand, which is accommodated in the bore (2) and can be adjusted with regard to the axial position of the spring plate within the bore (2). Furthermore, means (7) for adjusting the axial position of the spring plate (6) are provided. The invention further relates to a method for the pressure regulation in a fuel injection system of an internal combustion engine, in particular a Common-Rail injection system, in which a pressure regulation valve is used having a valve closing element (3) admitted by the spring force of a spring (4) in the direction of a valve seat. According to the invention, the spring force of the spring is variably adjustable, wherein the setting is brought about by an adjustment of the axial position of a spring plate (6), on which the spring (4) is supported in axial direction.