A flow sensitive split control valve for a torque converter

Abstract

A kind of flow-sensitive split control valve for torque converter, it relates to a split control valve.The main valve body is internally provided with spool cavity and spring cavity, the main valve core is arranged in spool cavity, the main spring is arranged in spring cavity, guide control cavity is fixed to the end of main valve body, guide control head is installed in guide control cavity to divide it into front cavity and rear cavity, guide control head is in contact with main valve core, valve body oil inlet and valve body oil outlet are arranged on the both sides of spool cavity, three-way joint is connected with valve body oil inlet, overflow detector is internally provided with throttle ring and is fixed on main valve body by gasket, oil inlet end is connected with three-way joint by connecting oil pipe, oil outlet end is connected with split oil pipe equipped with torque converter joint, two oil channels are processed in gasket to be communicated with the front and rear sides of throttle ring, throttle front oil path and throttle rear oil path are processed in the side wall of main valve body to be communicated with front cavity and rear cavity.The problem of poor flow sensitivity of split valve is solved, the oil precision required by torque converter is improved, and flow fluctuation is controlled.

Description

Technical Field

[0001] This invention relates to a flow control valve, and more particularly to a flow-sensitive flow control valve for torque converters, belonging to the field of flow control valve design technology. Background Technology

[0002] The function of a flow divider valve is to ensure that the same flow rate is supplied to two or more actuators from the same oil source (equal flow division), or that the flow rate is supplied to two actuators in a certain proportion (proportional flow division), or that one of the flow paths has the required flow rate. A torque converter is a fluid connector that transmits power from a prime mover (such as an internal combustion engine) that provides rotational power to a rotationally driven load. In vehicles equipped with automatic transmissions, the torque converter connects the power source to the load and is typically located between the engine's flexible plate and the transmission.

[0003] Currently used torque converters often require precise control of operating flow rate and pressure. In practical engineering, bypass check valves are often used to achieve this function. However, the actual flow rate tracking within the torque converter is not ideal. To ensure the high accuracy of the torque converter's flow rate requirements, it is necessary to adopt a certain structure to improve the flow sensitivity of the flow divider valve, thereby ensuring operating accuracy and reducing flow fluctuations. Given that traditional torque converter oil supply methods cannot adequately meet the high accuracy requirements of the torque converter's oil supply flow rate, this invention provides a flow-sensitive flow divider control valve for torque converters to solve the aforementioned technical problems. Summary of the Invention

[0004] To address the shortcomings of the prior art, this invention provides a flow-sensitive diversion control valve for torque converters. It solves the problem of poor flow sensitivity in traditional bypass check valve oil supply schemes during torque converter applications, improves the accuracy of the oil flow and pressure required by the torque converter, and controls flow fluctuations.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flow-sensitive diversion control valve for a torque converter, comprising a pilot head, a pilot cavity, a tee connector, a gasket, an overcurrent detector, a diversion oil pipe, a main valve body, and a main spring. The main valve body contains a valve core cavity and a spring cavity coaxially connected. The valve core cavity is open at its end and contains a main valve core. The spring cavity is closed at its end and contains a main spring that provides elastic support to the main valve core. The pilot cavity is coaxially fixed to the end of the main valve body and corresponds to the valve core cavity. The pilot head is movable and sealed inside the pilot cavity, dividing it into a front cavity and a rear cavity. The rear end of the pilot head coaxially extends out of the pilot cavity and contacts the main valve core. The valve core cavity has staggered, through-flowing sections on both sides. The valve body has an oil inlet and an oil outlet. The tee connector is connected to the oil inlet of the valve body. The overcurrent detector has a throttling ring inside and is fixed to the main valve body by a pad. The oil inlet of the overcurrent detector is connected to the tee connector through a connecting oil pipe. The oil outlet of the overcurrent detector is connected to a split oil pipe with a torque converter connector installed. The pad has two oil passages machined inside. The two oil passages are respectively connected to the front and rear sides of the throttling ring of the overcurrent detector. The main valve body has a pre-throttling oil passage and a post-throttling oil passage machined inside the side wall. The pre-throttling oil passage connects the oil passage located in front of the throttling ring to the front cavity. The post-throttling oil passage connects the oil passage located behind the throttling ring to the rear cavity.

[0006] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention processes a throttling oil passage before throttling and a throttling oil passage after throttling, which are respectively connected to the front and rear chambers of the control chamber, inside the side wall of the main valve body. A pressure difference is generated by a throttling ring inside the overcurrent detector. Oil enters the front and rear chambers of the control chamber respectively. Under the action of the pressure difference, the control head is pushed, causing the main valve core to move. Oil enters the main valve body from the valve body inlet. The displacement of the main valve core adjusts the opening of the valve body outlet, thereby returning excess oil flow to the oil tank, achieving a flow diversion effect. Furthermore, an overcurrent detector is set up to detect the oil flow rate. The structure of the control head can effectively improve the flow diversion effect and make the adjustment effect more stable, controlling the occurrence of flow fluctuations. This solves the problems of poor flow sensitivity and insufficient oil flow and pressure supply capacity of traditional flow diverters in torque converter applications. Attached Figure Description

[0007] Figure 1 This is an isometric view of the overall structure of the flow-sensitive diverter control valve for torque converters of the present invention;

[0008] Figure 2 yes Figure 1 Axonometric view of the sectional structure;

[0009] Figure 3 This is an isometric view of the internal structure of the main valve body of the present invention;

[0010] Figure 4This is an isometric view of the internal structure of the control cavity of the present invention. Detailed Implementation

[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0012] like Figures 1-4 As shown, a flow-sensitive diversion control valve for a torque converter includes a pilot head 2, a pilot chamber 3, a three-way connector 5, a pad 6, an overcurrent detector 9, a diversion oil pipe 12, a main valve body 13, and a main spring 17.

[0013] Combination Figures 1-3 As shown, the main valve body 13 has a valve core cavity 1302 and a spring cavity 1306 coaxially connected inside. The valve core cavity 1302 is open at its end and contains a main valve core 15 that controls the opening of the valve body inlet 1301 and the valve body outlet 1305. The spring cavity 1306 is closed at its end and contains a main spring 17 that elastically supports the main valve core 15. A spring seat 16 is preferably fixed to the end of the main spring 17 that supports the main valve core 15. The elastic support of the main spring 17 allows the main valve core 15 to initially close the valve body inlet 1301. Furthermore, to facilitate the adjustment of the preset pressure of the main spring 17, a threaded hole 1307 is machined through the main valve body 13 at the end of the spring cavity 1306. A nut 19 is fixed to the outer end of the threaded hole 1307, and a pressure adjusting screw 18 is screwed into the nut 19 to close the end of the spring cavity 1306 and support the main spring 17.

[0014] Combination Figures 2-4 As shown, the control cavity 3 is coaxially fixed to the end of the main valve body 13 and correspondingly arranged with the valve core cavity 1302. The front end of the control cavity 3 is fixed to the end cap 1 by screws, and the rear end of the control cavity 3 is fixed to the main valve body 13 by the control connecting plate 4. The control head 2 is movable and sealed inside the control cavity 3, dividing it into a front cavity 301 and a rear cavity 302. The rear end of the control head 2 coaxially and sealedly extends out of the control cavity 3 and contacts the main valve core 15. Specifically, the control head 2 includes a control device 201 that can move inside the control cavity 3. The edge of the control device 201 is provided with a sealing groove 202 that cooperates with the inner wall of the control cavity 3 for controlling the displacement of the main valve core 15. A guide shaft is integrally provided at the center of the control device 201. The front end of the guide shaft coaxially and sealedly extends out of the control cavity 3, and the rear end of the guide shaft coaxially and sealedly extends out of the control cavity 3 and contacts the main valve core 15. The control connecting plate 4 has a through hole 403 at a corresponding position for the rear end of the guide shaft to pass through.

[0015] Combination Figure 1 , Figure 3 As shown, the valve core cavity 1302 has a valve body inlet 1301 and a valve body outlet 1305 that are staggered and connected on both sides. The three-way connector 5 is connected to the valve body inlet 1301 by screws.

[0016] Combination Figures 1-2 As shown, the overcurrent detector 9 is connected to an external display module to monitor the flow rate of the oil. The overcurrent detector 9 has a throttling ring 14 inside and is fixed to the main valve body 13 by a pad block 6. The oil inlet end of the overcurrent detector 9 is screwed to fix the oil inlet connecting plate 8 and connected to the tee connector 5 through the connecting oil pipe 7. The oil outlet end of the overcurrent detector 9 is screwed to fix the oil outlet connecting plate 10 and connected to the branch oil pipe 12 with the torque converter connector 11 installed. The oil flowing out of the branch oil pipe 12 is supplied to the torque converter through the torque converter connector 11.

[0017] Combination Figure 2 , Figure 4 As shown, the pad 6 has two oil passages 601 machined inside. The two oil passages 601 are respectively connected to the front and rear sides of the throttling ring 14 of the overcurrent detector 9. Under the action of the throttling ring 14, the flow rate of oil flowing into the front oil passage 601 is greater than the flow rate of oil flowing into the rear oil passage 601, so that there is a pressure difference between the oil flowing into the front cavity 301 and the rear cavity 302 of the control cavity 3.

[0018] Combination Figures 2-4 As shown, the main valve body 13 has a pre-throttling oil passage 1303 and a post-throttling oil passage 1304 machined inside its side wall. The pre-throttling oil passage 1303 connects the oil passage 601 located in front of the throttling ring 14 to the front cavity 301. The control cavity 3 has a channel 303 connected to the front cavity 301 machined inside its side wall. The control connecting plate 4 has a front cavity connection hole 401 at a corresponding position to connect the pre-throttling oil passage 1303 to the channel 303. The post-throttling oil passage 1304 connects the oil passage 601 located behind the throttling ring 14 to the rear cavity 302. The control connecting plate 4 has a rear cavity connection hole 402 at a corresponding position to connect the post-throttling oil passage 1304 to the rear cavity 302.

[0019] Combination Figures 2-3 As shown, in order to further control the hydraulic pressure difference between the front cavity 301 and the rear cavity 302 in the control cavity 3, damping holes 1308 are respectively machined inside the pre-throttling oil passage 1303 and the post-throttling oil passage 1304. The diameter of the damping hole 1308 in the pre-throttling oil passage 1303 is larger than the diameter of the damping hole 1308 in the post-throttling oil passage 1304, so as to further control the oil flow rate into the front cavity 301 to be greater than the oil flow rate into the rear cavity 302.

[0020] In operation, the required oil flow rate and pressure for the torque converter are preset. The torque converter is connected via connector 11, and oil is supplied to the three-way connector 5 (the supplied oil flow rate and pressure are greater than the required oil flow rate and pressure for the torque converter). Initially, the main valve core 15 closes the valve body inlet 1301. Oil enters the overcurrent detector 9 via the connecting oil pipe 7, and under the action of the throttle ring 14, there is a pressure difference between the oil entering the two oil passages 601. Simultaneously, with the torque converter connector 11 connected, the required oil flows out from the branch oil pipe 12 to supply the torque converter. The oil in the two oil passages 601 enters the main valve body 13, and flows through the pre-throttle oil passage 130... After throttling, the oil in the throttling circuit 1304 (or, if damping orifice 1308 is provided, the oil also passes through damping orifice 1308) and finally enters the front chamber 301 and rear chamber 302 in the control chamber 3. Under the action of pressure difference, the control head 2 pushes the main valve core 15 to overcome the elastic force of the main spring 17 and move, changing the opening of the valve body outlet 1305. Excess oil flows out from the valve body outlet 1305, achieving the diversion effect. At the same time, the flow rate of the oil passing through is detected by the overcurrent detector 9, realizing the flow detection. In practical applications, the preset pressure of the main spring 17 can be adjusted by rotating the pressure regulating screw 18 so that the flow pressure after diversion meets the requirements of the torque converter.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A flow sensitive split control valve for a torque converter, characterized by: The utility model relates to a kind of main valve, including pilot head (2), pilot cavity (3), tee joint (5), cushion block (6), overflow detector (9), shunt oil pipe (12), main valve body (13) and main spring (17), the main valve body (13) inside coaxial communication is provided with valve core cavity (1302) and spring cavity (1306), the valve core cavity (1302) end penetrates and is provided with main valve core (15) inside, the spring cavity (1306) end is closed and is provided with main spring (17) and the main valve core (15) elastic support inside, the pilot cavity (3) is coaxially fixed in main valve body (13) end and is arranged with valve core cavity (1302) corresponding, the pilot head (2) moves sealing installation in pilot cavity (3) inside and separates it into front cavity (301) and rear cavity (302), pilot head (2) rear end coaxially sealed and extends pilot cavity (3) and is contacted with main valve core (15), valve core cavity (1302) both sides staggered penetration is provided with valve body oil inlet (1301) and valve body oil outlet (1305), the tee joint (5) is connected with the valve body oil inlet (1301) installation, the overflow detector (9) is provided with throttle ring (14) inside and is fixed on main valve body (13) by cushion block (6), overflow detector (9) oil inlet end is connected with tee joint (5) by connecting oil pipe (7), overflow detector (9) oil outlet end is connected and installed with the shunt oil pipe (12) of torque converter joint (11), the cushion block (6) is processed with two oil channels (601) inside, the two oil channels (601) are respectively communicated with the throttle ring (14) front and rear sides of overflow detector (9) arrangement, main valve body (13) side wall is processed with throttle front oil path (1303) and throttle rear oil path (1304) inside, the throttle front oil path (1303) is arranged with the oil channel (601) located in the front side of throttle ring (14) and the front cavity (301), the throttle rear oil path (1304) is arranged with the oil channel (601) located in the rear side of throttle ring (14) and the rear cavity (302).

2. A flow sensitive split control valve for a torque converter as set forth in claim 1, characterized in that: The main valve body (13) is located at the end of the spring cavity (1306) and is provided with a threaded hole (1307), the threaded hole (1307) is fixed with a nut (19) at the outer end, the nut (19) is screwed with a pressure regulating screw (18) inside to close the end of the spring cavity (1306) and support the main spring (17).

3. A flow sensitive split control valve for a torque converter according to claim 1 or 2, characterized in that: The pilot head (2) includes a pilot (201) that can move inside the pilot cavity (3), the pilot (201) is provided with a sealing groove (202) on the edge that cooperates with the inner wall of the pilot cavity (3), a guide shaft is integrally provided at the center of the pilot (201), the front end of the guide shaft coaxially extends out of the pilot cavity (3), the rear end of the guide shaft coaxially extends out of the pilot cavity (3) and contacts the main valve core (15).

4. A flow sensitive split control valve for a torque converter as set forth in claim 3, characterized in that: The throttle front oil path (1303) and the throttle rear oil path (1304) are respectively provided with damping holes (1308) inside, the diameter of the damping hole (1308) of the throttle front oil path (1303) is greater than the diameter of the damping hole (1308) of the throttle rear oil path (1304).

5. A flow sensitive split control valve for a torque converter as set forth in claim 1, further characterized by: The over-flow detector (9) is connected to an external display module for monitoring the flow rate of the oil.

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