Fuel injection valve support structure
AssigneeHitachi Astemo, Ltd.
InventorNaoki Tanaka
Life of this patent
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Abstract
A fuel injection valve support structure simple in structure is provided which is capable of preventing a fuel injection valve from rotating about an axis of a valve housing thereof without providing a special rotation-preventing piece on an elastic support member. In this support structure, a base plate (15) of an elastic support member (S) is provided with a notch (19) which receives a valve housing (1). A rotation-preventing protrusion (20) which engages with the notch (19) to prevent rotation of a fuel injection valve (I) about an axis (A) of the valve housing (1) is formed on a synthetic resin formation part (6) which covers the valve housing (1) while protruding a coupler (14) to one side.
Claims4
A fuel injection valve support structure in which a fuel nozzle cylinder portion (2) of a valve housing (1) is fitted into an injection valve mounting hole (10) of an engine E, a fuel supply cap (Da) of a fuel distribution pipe (D) supported by the engine (E) is fitted into a fuel introduction cylinder portion (4) of the valve housing (1), and an elastic support member (S) connected to the fuel supply cap (Da) so as to prevent rotation about an axis (A) of the valve housing (1) is interposed between the valve housing (1) and the fuel supply cap (Da) while biasing the valve housing (1) toward the injection valve mounting hole (10),
- wherein the elastic support member (S) is constituted of a base plate (15) abutting against a base surface (5) facing the fuel supply cap (Da) of the valve housing (1), and elastic pieces (16) each extending from one end of the base plate (15) and resiliently contacting the fuel supply cap (Da),
- wherein the base plate (15) is provided with a notch (19) which receives the valve housing (1),
- wherein the valve housing (1) is covered with a synthetic resin formation part (6) while protruding a power feeding coupler (14) to one side,
- wherein the base surface (5) is formed by a rear end surface of the synthetic resin formation part (6), and
- wherein the synthetic resin formation part (6) includes an edging plane edging from an edge of the base surface (5) to the coupler (14) to form one plane with the base surface (5), and
- a rotation-preventing protrusion (20) protruding from a transition portion straddling from the base surface (5) in the one plane to the edging plane to engage with the notch (19) and preventing a fuel injection valve (I) from rotating about the axis (A) of the valve housing (1).
Dependencies are inferred from the claim text.