Electromagnetic actuator and stator design in a fuel injector assembly
First Claim
1. An electromagnetic actuator for a fluid pressure control valve in a fuel injector for an internal combustion engine, the injector having a control module subassembly, a pump body defining a fuel pumping cylinder, an engine driven plunger in the cylinder, a fuel nozzle assembly comprising a nozzle control valve spring and spring cage subassembly, the module subassembly being disposed between the spring cage subassembly and the pump body;
- the control module subassembly including a fuel pressure control valve, the electromagnetic actuator having an armature connected to the fuel pressure control valve, the control valve having a centerline extending in the direction of movement of the armature;
a stator assembly adjacent to the armature including an electric coil bobbin, coil windings supported on the bobbin, the bobbin having an extension disposed radially outward relative to the control valve;
electrical connector pins secured to the bobbin extension and connected to wire leads at ends of the coil windings, the connector pins extending in the direction of the centerline and into the pump body; and
an external connector assembly secured to the pump body comprising electrical conductors for establishing a connection with an engine controller, the connector assembly establishing an electrical connection between the pins and the electrical conductors as the control module subassembly is assembled in place adjacent to the pump body.
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Accused Products
Abstract
An electromagnetic actuator for a control valve module in an engine fuel injector, the module being a replaceable, independent element of the injector. The actuator has a stator with electromagnetic coil windings on a bobbin located within the control valve module. An armature is connected to a control valve in the module. The bobbin supports and precisely positions connector pins for the coil windings for registry with an external electrical wire harness.
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Citations
14 Claims
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1. An electromagnetic actuator for a fluid pressure control valve in a fuel injector for an internal combustion engine, the injector having a control module subassembly, a pump body defining a fuel pumping cylinder, an engine driven plunger in the cylinder, a fuel nozzle assembly comprising a nozzle control valve spring and spring cage subassembly, the module subassembly being disposed between the spring cage subassembly and the pump body;
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the control module subassembly including a fuel pressure control valve, the electromagnetic actuator having an armature connected to the fuel pressure control valve, the control valve having a centerline extending in the direction of movement of the armature;
a stator assembly adjacent to the armature including an electric coil bobbin, coil windings supported on the bobbin, the bobbin having an extension disposed radially outward relative to the control valve;
electrical connector pins secured to the bobbin extension and connected to wire leads at ends of the coil windings, the connector pins extending in the direction of the centerline and into the pump body; and
an external connector assembly secured to the pump body comprising electrical conductors for establishing a connection with an engine controller, the connector assembly establishing an electrical connection between the pins and the electrical conductors as the control module subassembly is assembled in place adjacent to the pump body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification