A solenoid assembly for providing control over fluid pressure distribution in a transmission, where the solenoid assembly includes a solenoid portion and a valve portion, and the movement of the valve portion is controlled by the solenoid portion. There is a valve which is part of the valve portion,
A solenoid assembly for providing control over fluid pressure distribution in a transmission, where the solenoid assembly includes a solenoid portion and a valve portion, and the movement of the valve portion is controlled by the solenoid portion. There is a valve which is part of the valve portion, and the valve controls the distribution of fluid between a supply port, a control port, and an exhaust port. The distribution of fluid between the ports may include providing a pressure balance between the supply port and the control port, and allowing any excess fluid to pass through the exhaust port, or controlling the flow of fluid between the supply port and the control port, with any excess fluid exiting the exhaust port.
대표청구항▼
1. A solenoid assembly for a transmission, comprising: a solenoid portion;a valve portion, the movement of the valve portion controlled by the solenoid portion;a valve member being part of the valve portion;a magnet core being part of the solenoid portion;an armature being part of the solenoid porti
1. A solenoid assembly for a transmission, comprising: a solenoid portion;a valve portion, the movement of the valve portion controlled by the solenoid portion;a valve member being part of the valve portion;a magnet core being part of the solenoid portion;an armature being part of the solenoid portion, the armature moveable toward and away from the magnet core for moving said valve member;a return spring disposed between the magnet core and the armature, the return spring biasing the armature away from the magnet core;a magnetic sleeve, the sleeve having a large diameter portion integrally formed with a small diameter portion, the sleeve large diameter portion surrounding the armature and at least part of the magnet core, and the sleeve small diameter portion surrounding the valve portion, such that the valve portion is substantially contained within the sleeve;a supply port formed as part of the sleeve small diameter portion, such that the supply port receives fluid and the supply port is in fluid communication with the valve portion;a first valve seat being part of the valve portion and surrounded by the sleeve small diameter portion, the valve member being selectively in contact with the valve seat;a control port formed as part of the sleeve small diameter portion such that the control port is in fluid communication with the valve portion;an exhaust port formed as part of the sleeve small diameter portion, such that the exhaust port is in fluid communication with the valve portion;a coil for moving said armature, the coil at least partially surrounding the sleeve, the coil being part of the solenoid portion; anda yoke ring at least partially surrounding the coil and being magnetically connected with the core and welded with the sleeve. 2. The solenoid assembly of claim 1 wherein a separation plate is located within the sleeve, the separation plate separating the valve portion from the solenoid portion. 3. The solenoid assembly of claim 2 wherein the separation plate is located in the sleeve between the exhaust port and the armature. 4. The solenoid assembly of claim 2 wherein the separation plate is disposed in the large diameter portion of the sleeve. 5. The valve assembly of claim 1 wherein the armature has a main body connected with a plunger for contacting the valve member. 6. The solenoid assembly of claim 1 wherein the sleeve is connected to the core by a laser welding process. 7. The solenoid assembly of claim 1 wherein the armature has a Teflon coating. 8. The solenoid assembly of claim 1 wherein the yoke is connected to the core by a press fitted plate. 9. The solenoid assembly of claim 1, the valve portion further comprising the first valve seat being provided by a first insert providing an exhaust seat and a second valve seat being provided by a second insert providing a supply seat and wherein the valve member is in contact with the supply seat when the valve is in the closed position, and the valve member moves away from the supply seat and towards the exhaust seat when the valve is moved to the open position. 10. The solenoid assembly of claim 1 wherein the armature moves towards the magnet core when the coil is energized, allowing fluid flowing into the supply port to move the valve member relative to the first valve seat, such that at least a portion of the fluid flows through the control port, and when the coil is de-energized, the valve member moves relative to the first valve seat such that at least a portion of the fluid flows through the exhaust port. 11. The solenoid assembly of claim 1 wherein the sleeve is welded to the core. 12. The solenoid assembly of claim 2 wherein the separation plate is a deep drawn part. 13. The solenoid assembly of claim 2 wherein the valve member is a ball. 14. The solenoid assembly of claim 1 wherein the solenoid assembly is a variable current solenoid assembly. 15. A solenoid assembly for a transmission, comprising: a solenoid portion;a valve portion, the movement of the valve portion controlled by the solenoid portion;a valve member being part of the valve portion;a magnet core being part of the solenoid portion;an armature being part of the solenoid portion, the armature having a connected plunger in contact with the value member, the armature moveable toward and away from the magnet core for moving said valve member;a return spring disposed between the magnet core and the armature, the return spring biasing the armature away from the magnet core;a magnetic sleeve, the sleeve having a large diameter portion integrally formed with a small diameter portion, the sleeve large diameter portion surrounding the armature and welded around at least part of the magnet core, and the sleeve small diameter portion surrounding the valve portion, such that the valve portion is substantially contained within the sleeve;a supply port formed as part of the sleeve small diameter portion, such that the supply port receives fluid and the supply port is in fluid communication with the valve portion;an exhaust valve seat provided by a first insert being part of the valve portion and surrounded by the sleeve small diameter portion, the valve member being selectively in contact with the exhaust seat;a supply valve seat provided by a second insert wherein the valve member is in contact with the supply seat when the valve is in the closed position and towards the exhaust seat when the valve is in the open position;a control port formed as part of the sleeve small diameter portion such that the control port is in fluid communication with the valve portion;an exhaust port formed as part of the sleeve small diameter portion, such that the exhaust port is in fluid communication with the valve portion;a coil for moving said armature, the coil at least partially surrounding the sleeve, the coil being part of the solenoid portion;a yoke ring at least partially surrounding the coil and being magnetically connected with the core and welded with the sleeve large diameter portion; anda separation plate located in the sleeve large diameter portion and separating the valve portion from the solenoid portion between the armature and the exhaust port, the plunger extending through the separation plate. 16. The solenoid assembly of claim 15 wherein the separation plate is a deep drawn part.
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