Abstract:
A valve assembly (10) for a fluid injection valve (1) and a fluid injection valve (1) are disclosed. The valve assembly (10) comprises a valve body (100) having a cavity (110), a valve needle (120) which interacts with the valve body (100) for controlling fluid flow from a fluid outlet end (104) of the valve body (100), and a return spring element (130) which is preloaded for biasing the valve needle (120) towards a closing position. The return spring element (130) comprises a filter sieve (136) for filtering the fluid which flows through the cavity (110) to the fluid outlet end (104) in operation of the valve assembly (10).
Abstract:
An adjustment device (20) for a fuel injection valve, the fuel injection valve being configured to be arranged in a cylinder head (14) of an internal combustion engine (12) is disclosed. The adjustment device (20) comprises a ring element (30) which is arrangeable in a recess (16) of the cylinder head (14) between a valve housing (24) of the fuel injection valve and the cylinder head (14) to align the fuel injection valve (10) relative to the recess (16). The ring element (30) comprises two individual components, a metallic component (32) and an elastomeric component (34). Further, a fuel injection valve and a fuel injection system are disclosed.
Abstract:
A fuel injector for injecting fuel into a combustion engine comprises a valve with a movable needle for opening or closing the valve, an actuator for moving the needle into an open position and two springs mounted in parallel to move the needle into a closed position, wherein there is a play between the second spring and the needle when the needle is in the closed position.
Abstract:
A valve assembly (11) for an injection valve (10) comprises a valve needle (20), an armature (22) axially moveable relative to the valve needle (20), a stop device (50), and a flexible component (46). The stop device (50) is operable to limit the axial displacement of the armature (22) with respect to the valve needle (20). The flexible component (46) is in a generally cup-shaped form, is fixed to the armature (22) and is fixed to the stop device (50) and/or the valve needle (20). It has a bent-shaped profile and is preloaded by means of deformation of the bent-shaped profile such that it biases the armature (22) into contact with a surface of the stop device (50). It is deformable to allow axial displacement of the armature (22) in the first axial direction away from the stop element against the bias.
Abstract:
A valve assembly (3) is disclosed. It comprises a valve body (4), a valve needle (11), a stationary pole piece (25) and a moveable armature (23) of an electro-magnetic actuator unit (19). The pole piece (25) has a central axial opening (26) and is in one piece with the valve body (4) or fluid-tightly fixed to the valve body (4) so that fluid flowing through a cavity (9) of the valve body (4)from a fluid inlet portion (5) to a fluid outlet portion (7) has to flow through the central axial opening (26). The armature (23) and the valve body (4) shape a radial gap (34) between an inner surface of the valve body (4) and an outer surface (31) of the armature (23), the radial gap (34) defining an axial fluid channel along the outer surface (31) of the armature (23). An axial gap (32) is shaped between a lower surface (29) of the pole piece (25) and a top surface (27) of the armature (23), the axial gap (32) defining a radial fluid path from an aperture of the central axial opening (26) of the pole piece (25) to the radial gap (34) between the inner surface of the valve body (4) and the outer surface (31) of the armature (23). The lower surface (29) of the pole piece (25) and the top surface (27) of the armature (23) are unperforated so that fluid flowing through the cavity (9) from the fluid inlet portion (5) to the fluid outlet portion (7) has to pass the axial gap (32). Further, an injection valve (1) with the valve assembly (3) is disclosed.
Abstract:
Valve assembly for an injection valve and injection valve Valve assembly (3) for an injection valve (1), comprising a valve body (4) with a fluid outlet portion (7), a valve needle (11) preventing a fluid flow through the fluid outlet portion (7) in a closing position, a calibration spring (18) axially biasing the valve needle (11) in a closing direction towards the fluid outlet portion (5), an armature (23) of an electro-magnetic actuator unit (19), and an armature stopper (27). The armature stopper (27) comprises an armature support portion (31), a circumferential side wall (35) and a circumferential clamping portion (36). The circumferential clamping portion (36) has a circumferential gutter (37) formed by a base portion (39), an inner wall (40) being part of the circumferential side wall (35) and an outer wall (41) forming a press-fit area for press-fitting the armature stopper (27) into the valve body (4).
Abstract:
The invention relates to a valve assembly (11) for an injection valve (10), comprising a valve body (14) including a central longitudinal axis (L), the valve body (14) comprising a cavity (18) with a fluid inlet portion (42) and a fluid outlet portion (40), a valve needle (20) axially movable in the cavity (18), the valve needle (20) preventing a fluid flow through the fluid outlet portion (40) in a closing position and releasing the fluid flow through the fluid outlet portion (40) in further positions. The valve needle (20) comprises a retainer element (23) extending in radial direction. An electro-magnetic actuator unit (36) comprises an armature (22) and a pole piece (37), the armature (22) being axially movable in the cavity (18) and being designed to actuate the valve needle (20) via the retainer element (23), the pole piece (37) being fixedly coupled to the valve body (14) and comprising an inner recess (48), the retainer element (23) being at least partially arranged in the inner recess (48). The pole piece (37) comprises a stop element (50) extending into the inner recess (48) of the pole piece (37) in radial direction. The stop element (50) has a stop surface (52) facing the fluid outlet portion (40) and the retainer element (23). The stop surface (52) of the stop element (50) is designed to limit the axial movement of the retainer element (23). The invention relates to an injection valve (10) with a valve assembly (11).
Abstract:
An electromagnetic injection valve (1) is disclosed. It comprises an inlet tube (7), a valve body (3) comprising a cavity, in which a valve needle is axially moveable, a housing part (17) surrounding an electromagnetic actuator unit (9) of the injection valve (1) for moving the valve needle, an upper magnetic ring (13) press-fitted with the inlet tube (7) or the valve body (3) and a lower magnetic ring (15) press-fitted with the valve body (3). The housing part (17) and/or the lower magnetic ring (15) comprise at least one cut (23, 25) which extends in axial direction. Further, a method for assembling an electromagnetic injection valve is disclosed.
Abstract:
A power group (10) for a fluid injector is specified. It comprises a housing (11), a solenoid (12) including a coil (13) wound around a central axis (X) of the power group (10), a plurality of radially magnetized permanent magnets(15), each permanent magnet having an arched shape around the central axis, each permanent magnet extending over an angle of less than 360° around the central axis, and a ring made of plastic material (16) including a plurality of slots (17), each slot (17) accommodating one respective magnet of the permanent magnets (15) of the power group. Further, a fluid injector (100) and a method for manufacturing a fluid injector (100) are specified.
Abstract:
A fuel injector comprises a central longitudinal axis (L) and is operable to be arranged in a recess (15) of a cylinder head (14) of a combustion engine. The fuel injector comprises a housing (25), a valve body (26) and an adjustment element (30). The valve body (26) comprises a central area (36), an end area (38) and a transition area (40). In the central area (36), the valve body (26) has a first outer diameter (D1) and is at least partly surrounded by the housing (25). In the end area (38), the valve body (26) has a second outer diameter (D2), which is smaller than the first outer diameter (D1). The transition area (40) is arranged between the central area (36) and the end area (38). The adjustment element (30) is so shaped and positioned in the transition area (40) of the valve body (26) as to be arranged in the recess (15) of the cylinder head (14) between the valve body (26) and a first step (48) of the recess (15) to align the fuel injector (18) relative to the recess (15) in a radial and/or axial direction.