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US 5,634,596 AGranted
Fuel invasion preventer for solenoid fuel injection valve
AssigneeZexel Corporation
InventorYoshinori Abiko
Life of this patent
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Abstract
A fuel invasion preventer 31 for a solenoid fuel injection valve includes an anti-invasion cover 37 made of a nonmagnetic material and installed in an anti-invasion space 36 defined by the bobbin 9 of the solenoid actuator 8, the fuel supply pipe 4 and the valve housing 32, and the edges 37A, 37B of the anti-invasion cover 37 on the side communicating with the fuel passage 15 are welded to the walls 42, 43 of the fuel supply pipe 4 and the valve housing 32.
Claims20
A solenoid fuel injection valve, comprising:
- a valve housing having an inner surface,
- a fuel supply pipe having an outer surface, the fuel supply pipe being made of a magnetic material and being disposed in the valve housing to form a fuel passage,
- a solenoid actuator which includes a bobbin having a passage through which the fuel supply pipe passes and a solenoid winding wound on the bobbin, the solenoid actuator being disposed inside the valve housing,
- an armature responsive to energization of the solenoid actuator,
- a valve seat having a fuel nozzle,
- a needle valve coupled to the armature and moveable between a first position wherein the needle valve closes the fuel nozzle and a second position wherein the needle valve opens the fuel nozzle in response to energization of the solenoid actuator,
- an anti-invasion cover made of a nonmagnetic material, the cover having an inner annular surface terminating in upper and lower inner edges and an outer annular surface terminating in upper and lower outer edges, wherein at least one of the inner and outer annular surfaces is beveled, the cover being disposed in an anti-invasion space defined by the bobbin of the solenoid actuator, the outer surface of the fuel supply pipe and the inner surface of the valve housing such that fuel is prevented from contacting the solenoid actuator.
4 more elements
A solenoid fuel injection valve, comprising:
- a valve housing having an inner surface,
- a fuel supply pipe having an outer surface, the fuel supply pipe being made of a magnetic material and being disposed in the valve housing to form a fuel passage,
- a solenoid actuator which includes a bobbin having a passage through which the fuel supply pipe passes and a solenoid winding wound on the bobbin, the solenoid actuator being disposed within the valve housing,
- an armature responsive to energization of the solenoid actuator,
- a valve seat having a fuel nozzle,
- a needle valve coupled to the armature and moveable between a first position wherein the needle valve closes the fuel nozzle and a second position wherein the needle valve opens the fuel nozzle in response to energization of the solenoid actuator,
- an anti-invasion cover made of a nonmagnetic material, the cover having an inner annular surface terminating in upper and lower inner edges and an outer annular surface terminating in upper and lower outer edges, wherein at least one of the inner and outer annular surfaces is beveled,
- the cover being disposed in an anti-invasion space defined by the bobbin of the solenoid actuator, the outer surface of the fuel supply pipe and the inner surface of the valve housing,
- wherein at least one of the outer surface of the fuel supply pipe and the inner surface of the valve housing has a beveled portion defining the anti-invasion space and a non-beveled portion, the beveled portion and non-beveled portions defining a first angle therebetween, the at least one beveled surface of the anti-invasion cover defining a second angle with respect to the non-beveled portion of at least one of the outer surface of the fuel supply pipe and the inner surface of the valve housing such that fuel is prevented from contacting the solenoid actuator.
6 more elements
A solenoid fuel injection valve, comprising:
- a valve housing,
- a fuel supply pipe made of a magnetic material and being disposed in the valve housing to form a fuel passage,
- a solenoid actuator which includes a bobbin having a passage through which the fuel supply pipe passes and a solenoid winding wound on the bobbin, the solenoid actuator being installed inside the valve housing,
- an armature responsive to energization of the solenoid actuator,
- a valve seat having a fuel nozzle,
- a needle valve coupled to the armature and moveable between a first position wherein the needle valve closes the fuel nozzle and a second position wherein the needle valve opens the fuel nozzle in response to energization of the solenoid actuator,
- an anti-invasion cover made of a nonmagnetic material, the cover having an inner annular surface terminating in upper and lower inner edges and an outer annular surface terminating in upper and lower outer edges, wherein at least one of the inner and outer annular surfaces is beveled,
- the cover being disposed between the solenoid actuator and the fuel passage such that the cover forms a seal and fuel is prevented from contacting the solenoid actuator.
5 more elements
Dependencies are inferred from the claim text.