Fuel injection valve
AssigneeMitsubishi Electric Corporation
InventorsNorihisa FUKUTOMI, Akio SHINGU, Kyosuke WATANABE, Tsuyoshi MUNEZANE, Manabu HIRAI
Life of this patent
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Abstract
A fuel injection valve includes: a holder which accommodates a valve body, has a surface magnetically facing the outer periphery of an armature, and is joined to a core; a housing which is press-fitted onto the outer periphery of the holder and accommodates a coil; and a cap which covers the fuel upstream side of the coil in a lid shape and is press-fitted onto the outer periphery of the core. The lower surface of the cap is brought into contact with the upper end surface of the housing in a radially slidable state and then an outer peripheral portion of a contact surface between the cap and the housing is joined by laser welding.
Claims8
A fuel injection valve comprising:
- a valve body which is a movable element composed of a valve portion and an armature that is connected to said valve portion and serves as an electromagnetic suction portion of said valve portion, and constitutes a valve mechanism that is driven by magnetic suction force caused by a magnetic field generated by a coil and pressing force of a spring to mount or remove said valve portion on or from a valve seat;
- a core having a surface magnetically facing the fuel upstream side end surface of said armature;
- a holder which accommodates said valve body, has a surface magnetically facing the outer periphery of said armature, and is joined to said core;
- a housing which is press-fitted onto the outer periphery of said holder, and accommodates said coil;
- and
- a cap which covers the fuel upstream side of said coil in a lid shape, and is press-fitted onto the outer periphery of said core,
- wherein the lower surface of said cap is brought into contact with the upper end surface of said housing in a radially slidable state and then an outer peripheral portion of a contact surface between said cap and said housing is joined by welding.
Dependencies are inferred from the claim text.