A valve for a vehicle provided between a transmission and an oil cooler for cooling transmission oil may include a valve housing in which a first inflow port connected to the transmission and an exhaust port connected to the oil cooler are formed on both sides facing each other and a bypass port con
A valve for a vehicle provided between a transmission and an oil cooler for cooling transmission oil may include a valve housing in which a first inflow port connected to the transmission and an exhaust port connected to the oil cooler are formed on both sides facing each other and a bypass port connected to the transmission and a second inflow port connected to the oil cooler are formed at a position spaced apart from the first inflow port and the exhaust port along a length direction of the valve housing, and a control unit that is mounted inside the valve housing selectively connects the first inflow port to the exhaust port or the bypass port while expansion or contraction is performed depending on a temperature of the transmission oil, and selectively closes the exhaust port to control a flow stream of the transmission oil.
대표청구항▼
1. A valve for a vehicle provided between a transmission and an oil cooler for cooling transmission oil, the valve comprising: a valve housing in which, on both sides and facing each other, a first inflow port connected to the transmission and an exhaust port connected to the oil cooler are formed,
1. A valve for a vehicle provided between a transmission and an oil cooler for cooling transmission oil, the valve comprising: a valve housing in which, on both sides and facing each other, a first inflow port connected to the transmission and an exhaust port connected to the oil cooler are formed, and on the both sides and facing each other at a position spaced apart from the first inflow port and the exhaust port along a length direction of the valve housing, a bypass port connected to the transmission and a second inflow port connected to the oil cooler are formed; anda control unit that includes a deformable member, is mounted inside the valve housing, and selectively connects the first inflow port to the exhaust port or the bypass port while expansion or contraction of the deformable member is performed depending on a temperature of the transmission oil, and selectively closes the exhaust port to control a flow stream of the transmission oil,wherein the valve housing is configured so that a first end of the valve housing is closed and a second end thereof is open, and a mounting space connected to the first and second inflow ports, the exhaust port, and the bypass port is formed therein,wherein the control unit includes: a sliding member in which a first end is open and a mounting part is formed at a center portion of a second end, at least one first opening hole is formed on a first side corresponding to the first inflow port and the bypass port along a length direction of the sliding member, and at least one second opening hole is formed on a second side corresponding to the second inflow port and the exhaust port along the length direction of the sliding member, and wherein the sliding member is inserted to be slidable inside the valve housing;an end cap that is mounted to the second end of the valve housing, closes an interior of the valve housing, and is formed with a fixing groove at a center portion of the end cap;wherein the deformable member is inserted into the mounting part of the sliding member and selectively raises or lowers the sliding member, while ascending or descending on a fixing rod when expansion or contraction is performed inside the deformable member depending on the temperature of the transmission oil;wherein, one end of the fixing rod is fixed to the fixing groove of the end cap, and the other end is inserted into a bottom of the deformable member; anda first elastic member that is interposed between the sliding member and the valve housing and that applies elastic force to the sliding member, while being compressed or pulled depending on the expansion or contraction of the deformable member,wherein the at least one first opening hole includes a plurality of first opening holes that are separately formed at upper and lower portions of the sliding member in the length direction of the sliding member,wherein the at least one second opening hole includes a plurality of second opening holes that are separately formed at the upper and lower portions of the sliding member in the length direction of the sliding member, andwherein a first opening hole from the plurality of first opening holes is formed at the upper portion of the sliding member and has a size that is greater than that of a second opening hole from the plurality of second opening holes formed at the upper portion of the sliding member. 2. The valve for a vehicle of claim 1, wherein the first inflow port is formed on one of the both sides of the valve housing at a position diagonal to the second inflow port, wherein the second inflow port is formed on the other of the both sides of the valve housing. 3. The valve for a vehicle of claim 1, wherein the sliding member is formed in a cylindrical shape that is open at one end. 4. The valve for a vehicle of claim 1, wherein the sliding member is configured such that when the deformable member is not deformed, the plurality of the first opening holes are positioned in accordance with the first inflow port and the bypass port, the second opening hole formed at the upper portion of the sliding member is positioned below the exhaust port, and another second opening hole of the plurality of second opening holes formed at the lower portion of the sliding member is positioned in accordance with the second inflow port. 5. The valve for a vehicle of claim 1, wherein the sliding member ascends inside the valve housing and maintains the bypass port and the second inflow port in an open state at a time of expansion deformation of the deformable member, and the first and second opening holes formed at the upper portion of the sliding member are positioned in accordance with the first inflow port and the exhaust port to open the first inflow port and the exhaust port. 6. The valve for a vehicle of claim 1, wherein the sliding member is fixed to the deformable member through a fixing ring that is mounted between the mounting part and the deformable member before the deformable member is inserted to the mounting part. 7. The valve for a vehicle of claim 1, wherein the end cap is fixed to the valve housing through a mounting ring that is fixedly mounted to an interior circumferential surface of the second end of the valve housing. 8. The valve for a vehicle of claim 7, wherein the mounting ring is fixedly mounted through a ring groove formed along a periphery of the interior circumferential surface of the second end of the valve housing. 9. The valve for a vehicle of claim 1, wherein, between the valve housing and the end cap, a seal ring that prevents the transmission oil flowing into the valve housing from leaking to an outside of the valve housing is mounted. 10. The valve for a vehicle of claim 1, wherein the first elastic member is formed of a coil spring, a first end of which is supported on an inner side of the first end of the valve housing, and a second end of which is supported on an inner side of the second end of the sliding member. 11. The valve for a vehicle of claim 1, wherein the valve housing is formed with a support groove, in which the first elastic member is fixed in a supported state, on an inner side of the first end of the valve housing. 12. The valve for a vehicle of claim 1, wherein the sliding member is formed with at least one relief hole that is formed at a position spaced apart from the mounting part at the second end of the sliding member in which in which the mounting part is formed. 13. The valve for a vehicle of claim 12, wherein the at least one relief hole includes a plurality of relief holes that are formed at positions spaced apart from each other at a predetermined angle along a circumferential direction around the mounting part. 14. The valve for a vehicle of claim 12, wherein, between the sliding member and the deformable member, a pressure control unit is provided which selectively opens or closes the at least one relief hole when a differential pressure occurs by the transmission oil flowed inside the valve housing. 15. The valve for a vehicle of claim 14, wherein the pressure control unit includes: an opening and closing member that is disposed inside the second end of the sliding member to correspond to the at least one relief hole; anda second elastic member that is interposed between the opening and closing member and the deformable member inside the sliding member, and applies elastic force to the opening and closing member. 16. The valve for a vehicle of claim 15, wherein the opening and closing member is formed in a disk shape having a penetration hole formed at a center portion to correspond to the mounting part. 17. The valve for a vehicle of claim 16, wherein the opening and closing member is integrally formed with a protrusion that protrudes toward the second elastic member from an interior circumferential surface of the penetration hole. 18. The valve for a vehicle of claim 15, wherein the second elastic member is formed of a coil spring, a first end of which is supported by the deformable member, and a second end of which is supported by the opening and closing member. 19. The valve for a vehicle of claim 1, wherein the deformable member includes a wax material that contracts and expands inside the deformable member on the temperature of the transmission oil.
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