Back to results
US 2008/0185546 A1Published application
Pulse width modulated solenoid
AssigneeBorgWarner Inc.
InventorsDavid Mills, Ryan True, Aaron Biefer
Life of this patent
Estimating the term…
Abstract
A pulse width modulated solenoid control valve is described, wherein the valve includes a polymer fluid control body. The body includes a segmented fluid flow path for providing strength to the fluid control body assembly. Stand off ribs are provided to improve assembly into a control manifold. A casing forms an integral flux tube. A tapered push rod is used to reduce flux shorting.
Claims34
A solenoid fluid control valve, comprising:
- a fluid control body adapted for being received in a fluid housing, said fluid control body including a central cavity, and having a pressure supply passage at a first end and a radially extending pressure control passage;
- a feed supply tube positioned in said central cavity, said feed supply tube including an outer diameter in communication with the pressure control passage, and including an inner bore operably connected to said pressure supply passage, said feed supply tube being supported in said central cavity of said fluid control body by way of a radially and axially extending wall, said wall being segmented into a plurality of longitudinally extending flow chambers, said feed supply tube including a valve receiving chamber area;
- a valve seat portion being made of a metallic material and press fit into said fluid control body, said valve seat portion including a valve seat and a passage in communication between said valve seat and said pressure control passage;
- a valve contained in said valve receiving chamber operable to selectively close off communication between said pressure supply passage and said pressure control passage;
- and
- a solenoid for opening said valve in response to a signal.
3 more elements
A solenoid fluid control valve, comprising:
- a fluid control body adapted for being received in a fluid housing, said fluid control body including a central cavity, and having a pressure supply passage at a first end and a radially extending pressure control passage;
- a feed supply tube positioned in said central cavity, said feed supply tube including an outer diameter in communication with the pressure control passage, and including an inner bore operably connected to said pressure supply passage, said feed supply tube being supported in said central cavity of said fluid control body by way of a radially and axially extending wall, said wall being segmented into a plurality of longitudinally extending flow chambers, said feed supply tube including a valve receiving chamber area;
- a valve seat portion being made of a metallic material and press fit into said fluid control body, said valve seat portion including a valve seat and a passage in communication between said valve seat and said pressure control passage;
- a valve contained in said valve receiving chamber operable to selectively close off communication between said pressure supply passage and said pressure control passage;
- a solenoid for opening said valve in response to a signal, wherein said solenoid includes a central axis and has a coil wound around a bobbin, spaced from and positioned around said central axis, said coil having radially stepped radial inner diameters;
- a casing member for attaching said solenoid to said fluid control body;
- a portion of said casing member extending into the stepped portion of said coil for forming a flux tube therein;
- and
- an armature axially movable within said bobbin.
6 more elements
A solenoid fluid control valve, comprising:
- a fluid control body adapted for being received in a fluid housing, said fluid control body including a central cavity, and having a pressure supply passage at a first end and a radially extending pressure control passage;
- a feed supply tube positioned in said central cavity, said feed supply tube including an outer diameter in communication with the pressure control passage, and including an inner bore operably connected to said pressure supply passage, said feed supply tube being supported in said central cavity of said fluid control body by way of a radially and axially extending wall, said wall being segmented into a plurality of longitudinally extending flow chambers, said feed supply tube including a valve receiving chamber area;
- a valve seat portion being made of a metallic material and press fit into said fluid control body, said valve seat portion including a valve seat and a passage in communication between said valve seat and said pressure control passage;
- a valve contained in said valve receiving chamber operable to selectively close off communication between said pressure supply passage and said pressure control passage;
- a solenoid for opening said valve in response to a signal, wherein said solenoid includes a central axis and has a coil wound around a bobbin, spaced from and positioned around said central axis, said coil having radially stepped radial inner diameters;
- a casing member for attaching said solenoid to said fluid control body;
- a portion of said casing member extending into the stepped portion of said coil for forming a flux tube therein;
- an armature axially movable within said bobbin;
- a pole piece assembly adjacent said armature and interposed between said bobbin and said fluid control body;
- and
- a control rod extending along said central axis and through said pole piece assembly for opening of said valve, said control rod including a tapered end.
8 more elements
Dependencies are inferred from the claim text.