摘要:
The invention relates to an injector, in particular a fuel injector for an internal combustion engine, comprising an actuator module 8 controlling a valve 15 for setting a through-flow of a fluid medium, wherein the valve 15 connects a control chamber 4 for control of a control piston to a low-pressure region. The invention provides an injector which is improved with regard to the functional requirements for being capable of multiple injections. This is achieved in that the control chamber 4 is interconnected with a reservoir volume. The reservoir volume is a reservoir space 16, which is arranged in a valve body 7 of the injector.
摘要:
The invention relates to a method for producing a valve (1) that can be electromagnetically actuated which method comprises an electromagnet (2, 2a, 2b), an armature (3) that can be moved by the electromagnet (2, 2a, 2b), and a valve body (5), having means (4, 4a, 4b, 4c) for converting a movement of the armature (3) into an opening or closing of the valve (1), wherein the electromagnet (2, 2a, 2b) and the armature (3) are inserted into the valve body (5), wherein, before the electromagnet (2, 2a, 2b) is inserted into the valve body (5), a magnetic hysteresis curve (10) of a combination (6) of the electromagnet (2, 2a, 2b) having a test armature (3a) lying against said electromagnet (2, 2a, 2b) is recorded, the slope m1 of a first, substantially linear curve segment (11) of the hysteresis curve (10) is determined in the unsaturated state, and, from the slope m1, the slope m1* of a curve segment (31) of a hysteresis curve (30) of the finally assembled valve (1) having the armature (3) lying continuously against the electromagnet (2, 2a, 2b) is determined, said curve segment corresponding to the first curve segment (11). The invention further relates to a method for determining the armature stroke AH, wherein the magnetic energy ΔΕ in the air gap (9) formed between the armature (3) and the electromagnet (2, 2a, 2b) is evaluated from the difference between the first slope m0 and the second slope m1*.
摘要:
The invention relates to a magnet assembly (10), comprising a magnet core (11) and a magnet sleeve (25) accommodating same, and comprising a magnet armature (35) which cooperates with the magnet core (11), is arranged in a longitudinally moveable manner along a longitudinal axis (16) of the magnet sleeve (25), and which is arranged in an end position, forming a residual air gap (32) at a front face (33) of the magnet core (11) lying opposite the magnet armature (35). According to the invention, the magnet sleeve (25) has a retaining section (28) protruding radially in the direction toward the axis (16) for axially fixing the magnet core (11) with a spacer section (30) arranged overlapping radially with the magnet armature (35) in order to set the residual air gap (32).
摘要:
The invention relates to a magnet assembly (3) for a fuel injector (1). The magnet assembly (3) comprises an electromagnet (5) having a magnet core (7) and a magnet coil (9). The magnet assembly (3) further comprises an armature (17) for moving a valve member and a residual air gap disc (25) for setting a spacing between the magnetic core (7) and the armature (17). The residual air gap disc (25) is arranged between the electromagnet (5) and the armature (17). Furthermore, the residual air gap disc (25) is fixed in a direction parallel to a longitudinal axis (35) of the magnet assembly (3) by a fixing element (29). The fixing element (29) is designed as a separate item from the residual air gap disc (25).