摘要:
The housing body (14) of the fuel injection valve comprises a recess (108), the end region of said recess having a conical tapering (110) on the bottom side thereof. The supporting body (48) engages in said conical tapering (110) with a projection (116) also comprising a conical end region (118). The closing spring (40) is supported on the needle-shaped injection valve member (34) on one side, and on the guiding sleeve (38) on the other side. The guiding sleeve (38) is supported on the supporting body (48) with the front side (461) thereof, whereby the supporting body is held against the tapering (110) in a sealing manner, under the force exerted by the closing spring (40).
摘要:
A fuel injector is provided having a needle valve element and a nozzle member with a central bore configured to slidingly receive the needle valve element. The fuel injector also has a spring configured to bias the needle valve element toward a closed position. In addition, the fuel injection assembly has a guide element configured to reduce a lateral movement of the needle valve element. The fuel injection assembly further has a fluid flow restricting device configured to restrict the flow of a fluid through the needle valve element and create a fluid pressure differential between the fluid upstream and downstream of the fluid flow restricting device.
摘要:
A protection device for a lower guide system of a fuel injector includes a debris shield deflecting a fuel flow around a lower guide system and a particle trap collecting particles contained within the fuel flow. By deflecting the fuel flow towards flow passages around the lower guide system, the particles contained in the fuel flow are prevented from entering a lower guide area, such as a radial gap between the stationary components of the lower guide system and the moving component of the valve assembly. The particle trap may be defined in a lower housing of the fuel injector or may be integrated in the debris shield. The debris shield may be integral with a valve assembly or may be a separate component. A permeable area may be integrated in the debris shield to enable partial flow therethrough.
摘要:
A fuel injector is described. The fuel injector includes an inlet, outlet, seat, closure member, and a metering orifice disc. The metering orifice disc is disposed between the seat and the outlet. The metering orifice disc includes: a generally planar surface, a plurality of metering orifices that extends through the generally planar surface, the metering orifices being located radially outward of the seat orifice; and at least one flow channel having a cross-sectional area that decreases in magnitude starting at a location spaced from the longitudinal axis to proximate a perimeter of a metering orifice. A seat subassembly and a metering orifice disc are described. And a method of atomizing fuel is also described.
摘要:
An electromagnetic fuel injection valve is provided in which a valve body is housed in a valve housing having a cylindrical magnetic body, the front end of a cylindrical non-magnetic body surrounding a part of a movable core coaxially connected to the valve body is connected coaxially to the rear end of the cylindrical magnetic body, and a fixed core is fitted into and fixed to a rear portion of the cylindrical non-magnetic body, wherein the movable core (18) includes a tubular sliding portion (18a) having an outer peripheral face that is in sliding contact with an inner peripheral face of a rear portion of the cylindrical magnetic body, a rear tubular opposing portion (18b) that is connected coaxially and integrally to the rear end of the tubular sliding portion (18a) and has the outer periphery thereof facing the inner periphery of the cylindrical magnetic body (9), and a front tubular opposing portion (18c) that has the outer periphery thereof facing the inner periphery of the cylindrical magnetic body (9) and is connected coaxially and integrally to the front end of the tubular sliding portion (18a), and when the diameter of the rear tubular opposing portion (18b) is D1, the diameter of the front tubular opposing portion (18c) is D2, and the diameter of the tubular sliding portion (18a) is D3, they are set so that D1
摘要:
A fuel injection device 1A includes a nozzle body 10 equipped with multiple injection apertures 12, a needle valve 20 arranged in the nozzle body, a fuel swirl portion 24 in which fuel FE is swirled along an inner wall surface of the nozzle body, and a guide portion 22 applying swirl force to the fuel and then guiding the fuel to the fuel swirl portion, the fuel swirl portion being arranged at a position at which the fuel swirl portion partially overlaps with the injection apertures. When the needle valve is at a low lift position, the fuel swirl portion overlaps with parts of the injection apertures so that the shape of sprayed fuel can be formed in diffusive spray having a wide spray angle. When the needle valve is at a high lift position, the shape of sprayed fuel can be formed in column-shaped spray having a narrow spray angle.
摘要:
An actor device (14) for an injector has a solid-state actuator (17) and a first and a second end plate (18, 16) which are coupled to the solid-state actuator (17) at first and, respectively, at second axial end of the solid-state actuator (17). Further, the actor device (14) has a sliding body (24) which is rigidly coupled to the first end plate (18) and which extends to the second end plate (16). The sliding body (24) radially surrounds the solid-state actuator (17) and has a clearance to the solid-state actuator (17) and to the second end plate (16).
摘要:
An injection valve has an injector housing (1) and an actuator and also a nozzle assembly. The nozzle assembly has a nozzle body (6) with a recess (8) into which a nozzle needle (10) is introduced and at one axial end of which an injection nozzle (12) is embodied. The recess (8) has, axially adjacent to the injection nozzle (12), a first guide region (14) for the nozzle needle (10). The recess (8) also has at least one cross-sectional extension which extends toward the other axial end. The recess (8) is embodied for the purpose of delivering fluid to the injection nozzle (12). A guide bushing (20) is introduced into the recess (8) in a subsection of the cross-sectional extension, the guide bushing (20) forming a second guide region (22) for the nozzle needle (10) and being embodied for conducting fuel radially outside of the second guide region (22).
摘要:
A fuel injector is described that includes a polymeric housing, pole piece, filter assembly, coil assembly, spring member, armature assembly and metering assembly. The polymeric housing has a passageway extending between an inlet and an outlet along a longitudinal axis. The pole piece is disposed in the passageway. The metering assembly is secured to the polymeric housing proximate the outlet. The metering assembly has an 0-ring disposed between a seat molded to a polymeric support member. The polymeric support member includes a peripheral portion bonded to the polymeric housing proximate the outlet. A method of sealing a fuel injector outlet end is described.
摘要:
A fuel injector for an internal combustion engine having an integrated seat guide cold forged of precipitation hardened stainless steel wherein the integrated seat guide having superior corrosion resistance and welding characteristics to a stainless steel injector body. The integrated seat guide includes a fuel outlet, a valve seat disposed about said fuel outlet, a guide portion adjacent to said valve seat, an end surface opposite said fuel outlet, and an annular shoulder with an annular weld affixing integrated seat guide to injector body.