Fuel injector filter unit having a composite housing
AssigneeSiemens Automotive Corporation
InventorMichael P. Dallmeyer
Life of this patent
Estimating the term…
Abstract
A filter unit for an inlet tube of a fuel injector is shown. The inlet tube has an inside surface, an outside surface, and an annular end surface extending between the inside and outside surfaces. The filter unit includes a filter mesh defining a flow area. A body directs fuel flow through the flow area. The body has a first portion adapted for overlying the inside surface, a second portion adapted for overlying the annular end surface, and a third portion adapted for overlying the outside surface. A ferrule reinforces the body. The ferrule has a first part contiguously engaging the first portion of the body, a second part contiguously engaging the second portion of the body, and a third part contiguously engaging the third portion of the body.
Claims16
A filter unit for an inlet tube of a fuel injector, the inlet tube having an inside surface, an outside surface, and an annular end surface extending between the inside and outside surfaces, the filter unit comprising:
- a filter mesh defining a flow area;
- a body directing fuel flow through the flow area, the body having a first portion adapted for overlying the inside surface, a second portion adapted for overlying the annular end surface, and a third portion adapted for overlying the outside surface;
- and
- a ferrule reinforcing the body, the ferrule having a first part contiguously engaging the first portion of the body, a second part contiguously engaging the second portion of the body, and a third part contiguously engaging the third portion of the body.
A fuel injector comprising:
- an inlet tube having an inside surface, an outside surface, and an annular end surface extending between the inside and outside surfaces;
- a filter unit including a filter mesh defining a flow area;
- a body directing fuel flow through the flow area, the body having a first portion overlying the inside surface, a second portion overlying the annular end surface, and a third portion overlying the outside surface;
- and
- a ferrule reinforcing the body, the ferrule having a first part contiguously engaging the first portion of the body, a second part contiguously engaging the second portion of the body, and a third part contiguously engaging the third portion of the body.
A method of manufacturing a filter unit for an inlet tube of a fuel injector, the method comprising:
- providing a filter mesh defining a flow area;
- providing a ferrule having a first part adapted for overlying the inside surface, a second part adapted for overlying the annular end surface, and a third part adapted for overlying the outside surface;
- and
- molding a body to connect the filter mesh and the ferrule, the body directing the fuel flow through the flow area.
Dependencies are inferred from the claim text.