Regulating valve and vehicle retarder and engine cooling system

Abstract

This application provides a regulating valve and a retarder and engine cooling system for a vehicle with a retarder. The regulating valve includes a housing, a cover, and a valve body. The housing has a cavity and an opening communicating with the cavity, a first housing connection port, a second housing connection port, and a third housing connection port. The cover is used to close the opening. The valve body is rotatably mounted in the cavity through the opening. The valve body has a valve body channel forming a first valve body port and a second valve body port. The valve body channel can selectively communicate with the first housing connection port and the second housing connection port or with the second housing connection port and the third housing connection port. The valve body channel includes an intermediate section forming a circular bend, wherein, in the axial cross-section of the intermediate section, the intermediate section has an arc-shaped inner boundary and an outer boundary, the centers of the inner boundary and the outer boundary being the same. The regulating valve and cooling system provided by this application can reduce flow resistance while providing a large flow rate.

Description

Technical Field

[0001] This application relates to the field of control valves, and more specifically, to a control valve for a cooling system. Background Technology

[0002] Commercial vehicles contain an engine and a retarder. The engine generates driving force to accelerate the vehicle, while the retarder generates braking force to decelerate it. Both acceleration and deceleration generate heat, causing their temperatures to rise. Therefore, a cooling system is needed to cool both the engine and the retarder. Summary of the Invention

[0003] Exemplary embodiments of this application can solve at least some of the above-mentioned problems. This application provides a regulating valve for a vehicle's retarder and engine cooling system, comprising a housing, a cover, and a valve body. The housing has a cavity and an opening communicating with the cavity, a first housing connection port, a second housing connection port, and a third housing connection port, the first housing connection port, the second housing connection port, and the third housing connection port being configured to connect to the vehicle's retarder and engine cooling system. The cover is configured to close the opening and is configured to support a drive component. The valve body is connected to the drive component and rotatably mounted in the cavity via the drive component. The valve body has a valve body channel forming a first valve body port and a second valve body port. The valve body is configured to selectively connect the first housing connection port and the second housing connection port or the second housing connection port and the third housing connection port via the valve body channel. The valve body channel includes an intermediate section forming a bend, wherein the intermediate section has an arc-shaped inner boundary and an outer boundary in its axial cross-section, and the inner boundary and the outer boundary are concentric.

[0004] According to the above-described regulating valve, the valve body channel further includes a first end section and a second end section, the first end section, the intermediate section, and the second end section are connected sequentially, and the first end section and the second end section are located at the first valve body port and the second valve body port, respectively. The first end section and the second end section form a straight pipe.

[0005] According to the above regulating valve, the first end section and / or the second end section is a variable diameter straight pipe whose diameter gradually decreases or gradually increases in the direction away from the middle section.

[0006] According to the above-described regulating valve, the valve body includes a valve body body having a valve body ball surface, a valve body channel disposed within the valve body body, and the first valve body port and the second valve body port located on the valve body ball surface. The cover includes a cover body and a cover extension, the cover extension extending downward from the lower surface of the cover body, the inner surface of the cover extension being a ball surface matching the valve body ball surface, and the cover extension being located between the valve body and the housing.

[0007] According to the aforementioned regulating valve, the intermediate section is a circular bend with a first diameter. The ball surface of the valve body has a second diameter. The ratio of the first diameter to the second diameter ranges from 1:1.5 to 1:2.5.

[0008] According to the aforementioned regulating valve, the cover extension is provided with a first recess, a second recess, and a third recess, which are respectively formed by recessing upwards from the lower edge of the cover extension. The first recess, the second recess, and the third recess are respectively corresponding to the first housing connection port, the second housing connection port, and the third housing connection port, thereby ensuring that the cover extension does not obstruct the communication between the first housing connection port, the second housing connection port, and the third housing connection port and the first valve body port and the second valve body port.

[0009] According to the above-described regulating valve, the valve body has a spherical center. The housing has a central portion corresponding to the height of the spherical center, and the inner wall of the housing located below the central portion is substantially a spherical surface that matches the spherical surface of the valve body.

[0010] According to the above regulating valve, the range of the gap between the inner surface of the cover extension and the valve body body, and the gap between the inner wall of the housing and the ball surface of the valve body, is less than or equal to 2.5 mm.

[0011] According to the above-mentioned regulating valve, the flow rate of the fluid flowing through the regulating valve is in the range of 500L / min-800L / min.

[0012] This application also provides a vehicle retarder and engine cooling system, comprising the aforementioned regulating valve, a first branch pipe, a second branch pipe, a third pipe, a connecting pipe, an engine cooling passage, and a retarder cooling passage. The first branch pipe and the second branch pipe are connected to the first housing connection port of the housing. The third pipe is connected to the third housing connection port of the housing. Specifically, the first branch pipe of the regulating valve is connected to the outlet end of the retarder cooling passage via the connecting pipe; the second branch pipe of the regulating valve is connected to the inlet end of the engine cooling passage via the connecting pipe; the second housing connection port is connected to the outlet end of the engine cooling passage via the connecting pipe; and the third pipe of the regulating valve is connected to the inlet end of the retarder cooling passage via the connecting pipe.

[0013] The regulating valve of this application has a simple structure and low flow resistance. It can select the flow path through a drive device, thereby achieving cooling of the engine or the retarder. Attached Figure Description

[0014] The features and advantages of this application can be better understood by reading the following detailed description with reference to the accompanying drawings, in which the same reference numerals denote the same parts, wherein:

[0015] Figure 1A This is a perspective view of a regulating valve according to an embodiment of this application;

[0016] Figure 1B-1C yes Figure 1A Exploded view of the control valve shown

[0017] Figure 1D yes Figure 1A The regulating valve shown Figure 1A Cross-sectional view of line AA in the middle;

[0018] Figure 1E yes Figure 1A The regulating valve shown Figure 1A Cross-sectional view of the middle BB line;

[0019] Figure 2A-2B yes Figure 1A The regulating valve shown Figure 1A Cross-sectional view of the CC line;

[0020] Figure 3 Is using Figure 1A The diagram shows the system diagram of the retarder and engine cooling system of the regulating valve;

[0021] Figure 4A yes Figure 3 The diagram shows the system status of the retarder and engine cooling system when the valve body is in the first position.

[0022] Figure 4B yes Figure 3 The diagram shows the system status of the retarder and engine cooling system when the valve body is in the second position. Detailed Implementation

[0023] Various specific embodiments of this application will now be described with reference to the accompanying drawings, which form part of this specification. It should be understood that in the following drawings, the same components are referred to by the same reference numerals, and similar components are referred to by similar reference numerals.

[0024] Various specific embodiments of this application will now be described with reference to the accompanying drawings, which form part of this specification. It should be understood that although terms indicating direction, such as "front," "rear," "up," "down," "left," and "right," are used herein to describe various exemplary structural parts and elements, their use is merely for illustrative purposes and is based on the exemplary orientations shown in the drawings. Since the embodiments disclosed herein can be arranged in different orientations, these terms indicating direction are illustrative only and should not be considered limiting.

[0025] Ordinal numbers such as “first” and “second” used in this application are for distinction and identification only and have no other meaning. Unless otherwise specified, they do not indicate a specific order or a specific relationship. For example, the term “first housing connection” does not imply the existence of a “second housing connection”, nor does the term “second housing connection” imply the existence of a “first housing connection”.

[0026] Figure 1A This is a perspective view of a regulating valve 100 according to an embodiment of this application. Figure 1B-1C yes Figure 1A The exploded view of the control valve is shown. Figure 1D yes Figure 1A The regulating valve 100 shown is along Figure 1A Cross-sectional view of line AA in the middle. Figure 1E yes Figure 1A The regulating valve 100 shown is along Figure 1A A cross-sectional view of the middle BB line. (See diagram below.) Figure 1A-1EAs shown, the regulating valve 100 includes a housing 102, a valve body 104, and a cover 106. The housing 102 has a cavity 202 and an opening 211, a first housing connection port 212, a second housing connection port 214, and a third housing connection port 216 communicating with the cavity 202. The opening 211, the first housing connection port 212, the second housing connection port 214, and the third housing connection port 216 are respectively located above, to the left, to the front, and to the right of the cavity 202. All openings 211, 212, 214, and 216 are circular. In this example, the first housing connection port 212 and the second housing connection port 214 are perpendicular to each other, and the second housing connection port 214 and the third housing connection port 216 are also perpendicular to each other. The valve body 104 can pass through the opening 211 and is disposed within the cavity 202. The bottom of the cavity 202 is provided with a recess 222 for accommodating the second shaft 314 of the valve body 104.

[0027] The valve body 104 includes a valve body body 302, a first shaft 312, a second shaft 314, and a valve body limiting portion 332. The valve body body 302 is generally a sphere cut vertically, with its surface being the valve body spherical surface 328. The valve body body 302 has a spherical center. Figure 1D As shown, the housing 102 has a central portion corresponding to the height of the sphere's center. The inner wall of the housing 102 below the central portion is generally a spherical surface, which matches the spherical surface 328 of the valve body. Specifically, in the housing 102, the wall 233 of the cavity 202 located below the second housing connection port 214 is spherical. The wall 234 of the cavity 202 located on the opposite side of the second housing connection port 214 (i.e., the portion located between the first housing connection port 212 and the third housing connection port 216) is also spherical. The radii of walls 233 and 234 are slightly larger than the radius of the spherical surface 328 of the valve body, so that when the valve body 302 is accommodated in the cavity 202, there is a certain gap between the spherical surface 328 of the valve body and the wall 233, and between the spherical surface 328 of the valve body and the wall 234, so that when the valve body 302 rotates, the spherical surface 328 of the valve body will not rub against the walls 233 and 234. As an example, the value of the gap between the inner surface of the housing 102 and the ball surface 328 of the valve body is less than or equal to 2.5 mm.

[0028] The lower end of the first shaft 312 is connected to the upper part of the valve body 302, and the upper end of the second shaft 314 is connected to the lower part of the second shaft 314, thereby enabling the valve body 302 to rotate around the first shaft 312 and the second shaft 314. A valve body limiting part 332 is disposed on the upper part of the valve body 302 to limit the angle of rotation of the valve body 302. In the embodiment of this application, the valve body limiting part 332 is generally arc-shaped. The angle formed by the two ends of its arc is 90°. It can cooperate with the arc-shaped groove 434 in the cover 106 to limit the rotation angle of the valve body 302.

[0029] A valve body channel 324 is provided in the valve body body 302. A first valve body port 322 and a second valve body port 326 are formed on the valve body ball surface 328 of the valve body body 302 in the valve body channel 324. The first valve body port 322 and the second valve body port 326 are both located at a distance from the upper and lower tangential surfaces of the valve body ball surface 328, respectively, to abut against the first pipe sealing assembly 512 and the third pipe sealing assembly 514. The specific structure of the valve body channel 324 will be discussed in conjunction with… Figure 2A-2B This will be discussed below.

[0030] The cover 106 includes a cover body 402 and a cover extension 404. The cover 106 is used to close the opening 211 on the housing 102 and support the drive member 110. Specifically, the edge dimension of the cover body 402 is larger than the size of the opening 211 on the housing 102, so that the cover body 402 can close the opening 211 on the housing 102. The cover extension 404 extends downward from the lower part of the cover body 402. The inner surface 412 of the cover extension 404 is a spherical surface and its shape matches the valve body spherical surface 328 of the valve body body 302. When the cover 106 is closed on the housing 102, the inner surface 412 of the cover extension 404 can be concentric with the valve body spherical surface 328 of the valve body body 302. Specifically, the radius of the inner surface 412 is slightly larger than the radius of the valve body ball surface 328, so that when the valve body body 302 is accommodated in the cavity 202 and the cover 106 is closed, there is a certain gap between the valve body ball surface 328 and the inner surface 412 of the cover 106, so that when the valve body body 302 rotates, the valve body ball surface 328 will not rub against the inner surface 412 of the cover 106. As an example, the value of the gap between the inner surface 412 of the cover extension 404 and the valve body ball surface 328 is less than or equal to 2.5 mm.

[0031] Combination Figure 1DIt can be seen that when the valve body 302 is accommodated in the cavity 202 and the cover 106 is closed, the housing 102 and the cover 106 can effectively enclose the valve body 302. More specifically, the cover extension 404 is located between the valve body 302 and the housing 102. The gaps between the walls 233, 234, and the inner surface 412 and the valve body ball surface 328 of the valve body 302 are all set to be less than or equal to 2.5 mm. This ensures that when fluid flows into the regulating valve 100 from the second housing connection port 214, the fluid will not flow excessively into the gaps, thus reducing flow resistance.

[0032] The cover extension 404 is provided with a first recess 422, a second recess 424, and a third recess 426. The first recess 422, the second recess 424, and the third recess 426 are respectively formed by recesses upward from the lower edge of the cover extension 404. The positions of the first recess 422, the second recess 424, and the third recess 426 correspond to the positions of the first housing connection port 212, the second housing connection port 214, and the third housing connection port 216, respectively, so that the cover extension 404 does not obstruct the communication between the first housing connection port 212, the second housing connection port 214, and the third housing connection port 216 and the first valve body port 322 and the second valve body port 326. More specifically, the first recess 422 is located on the left side, the second recess 424 is located on the right side, and the third recess 426 is located on the front side. When the first valve body port 322 and the second valve body port 326 on the valve body 104 are aligned with two of the first housing connection port 212, the second housing connection port 214 and the third housing connection port 216, the cover extension 404 will not block the alignment area of ​​the first valve body port 322 and the second valve body port 326 with the first housing connection port 212, the second housing connection port 214 and the third housing connection port 216.

[0033] Thus, when the cover 106 and the housing 102 are closed together, they form a valve body cavity for accommodating the valve body 302. Since the valve body 104 is inserted into the valve body cavity from top to bottom, the matching lower spherical surface is formed by the housing 102, while the matching upper spherical surface is formed by the cover 106. This arrangement minimizes the gap between the valve body 104 and the cover 106 and housing 102, facilitating installation and resulting in a compact structure.

[0034] The cover body 402 is also provided with a through hole 432 and an arc-shaped groove 434. The through hole 432 vertically penetrates the cover body 402 so that the first shaft 312 of the valve body 104 can pass through the cover 106. The arc-shaped groove 434 has an angle of approximately 180° between its two ends. It can cooperate with the valve body limiting part 332, so that the valve body 302 can rotate by an angle of 90°.

[0035] like Figure 1A-1E As shown, the regulating valve 100 also includes a drive component 110 for driving the valve body 104. Specifically, the first shaft 312 on the upper part of the valve body 302 extends out of the cover 106 and is connected to the drive component 110, so that the drive component 110 can drive the valve body 104 to rotate in the housing 102.

[0036] like Figure 1A-1E As shown, the regulating valve 100 also includes an axial seal 516. The axial seal 516 is annular and is sleeved on the first shaft 312 of the valve body 104, positioned between the first shaft 312 and the cover 106 to provide a seal between the valve body 104 and the cover 106. When fluid flows through the regulating valve 100, the axial seal 516 prevents fluid from flowing upwards along the first shaft 312 into the drive component 110, thereby protecting the drive component 110.

[0037] like Figure 1A-1E As shown, the regulating valve 100 also includes a first pipe fitting 601 and a first pipe sealing assembly 512. Specifically, the first pipe fitting 601 includes a main pipe 612, a first branch pipe 614, and a second branch pipe 616. Both the first branch pipe 614 and the second branch pipe 616 are connected to the main pipe 612 and communicate with the first housing connection port 212 of the regulating valve 100 through the main pipe 612. The main pipe 612 is arranged horizontally, and its right port is connected to the first housing connection port 212. An annular recess 622 is provided at the right port of the main pipe 612 for receiving the first pipe sealing assembly 512. The first branch pipe 614 is arranged generally vertically and is inclined to the rear at an angle. The lower port of the first branch pipe 614 is connected to the left port of the main pipe 612, and the upper port of the first branch pipe 614 is used to connect to a connecting pipe (not shown). The second branch pipe 616 is arranged generally horizontally and is inclined to the upward at an angle. The rear port of the second branch pipe 616 is connected to the left port of the main pipe 612, and the front port of the second branch pipe 616 is used to connect to a connecting pipe (not shown).

[0038] The first tube sealing assembly 512 includes three sealing rings. The three sealing rings abut against each other and are received in the recess 622. The right side of the first tube sealing assembly 512 abuts against the valve body 302, thereby allowing the first tube sealing assembly 512 to be clamped and held in place by the first tube 601 and the valve body 302. More specifically, the right side of the first tube sealing assembly 512 abuts against the valve body ball surface 328, thereby allowing the first tube sealing assembly 512 to seal the gap between the valve body 302 and the housing 102 when neither the first valve body port 322 nor the second valve body port 326 on the valve body 302 is in communication with the first housing connection port 212, thus preventing fluid from flowing into the gap between the valve body 302 and the housing 102.

[0039] like Figure 1A-1E As shown, the regulating valve 100 also includes a third pipe 701 and a third pipe sealing assembly 514. The third pipe 701 is approximately a 90° bend. The left end of the third pipe 701 is connected to the third housing connection port 216 of the regulating valve 100, and the right end of the third pipe 701 is used to connect to a connecting pipeline (not shown). An annular recess 722 is provided at the left end of the third pipe 701 for receiving the third pipe sealing assembly 514.

[0040] The third tube sealing assembly 514 includes three sealing rings. The three sealing rings abut against each other and are received in the recess 722. The left side of the third tube sealing assembly 514 abuts against the valve body body 302, thereby allowing the third tube sealing assembly 514 to be clamped and held in place by the third tube 701 and the valve body body 302. More specifically, the left side of the third tube sealing assembly 514 abuts against the valve body ball surface 328, thereby allowing the third tube sealing assembly 514 to seal the gap between the valve body body 302 and the housing 102 when neither the first valve body port 322 nor the second valve body port 326 on the valve body body 302 is in communication with the third housing connection port 216, thus preventing fluid from flowing into the gap between the valve body body 302 and the housing 102.

[0041] It should be noted that, since the third housing connection port 216 is a normally open port in this embodiment, no sealing element is provided at the third housing connection port 216.

[0042] Figure 2A-2B yes Figure 1A The regulating valve 100 shown is along Figure 1A A cross-sectional view of the CC line. (See image.) Figure 2A-2B As shown, the valve body 302 has a first position and a second position. Figure 2A The state of the valve body 302 when it is in the first position is shown. When the valve body 302 is in the first position, the valve body channel 324 in the valve body 302 can connect the first housing connection port 212 and the second housing connection port 214. Figure 2B The diagram shows the state of the valve body 302 in the second position. When the valve body 302 is in the second position, the valve body channel 324 in the valve body 302 can connect the second housing connection port 214 and the third housing connection port 216.

[0043] Specifically, the valve body channel 324 includes a first end section 342, an intermediate section 344, and a second end section 346. The first end section 342, intermediate section 344, and second end section 346 are interconnected. The first end section 342 is located at the first valve body port 322, and the second end section 346 is located at the second valve body port 326. The intermediate section 344 forms a bend. Figure 2A-2BAs shown, the intermediate section 344 is a circular bend. Its centerline is an arc. In its axial cross-section, the intermediate section 344 has an inner boundary 242 and an outer boundary 241. The inner boundary 242 and the outer boundary 241 are concentric. In other words, any radial cross-section is a circle of the same size. As an example, the cross-sectional area of ​​the intermediate section 344 can be the smallest among the first housing connection port 212, the second housing connection port 214, and the third housing connection port 216. The intermediate section 344 has a first diameter, and the valve body ball surface 328 has a second diameter. The ratio of the first diameter to the second diameter is in the range of 1:1.5 to 1:2.5. This is beneficial for arranging a valve body channel 324 with a larger cross-section on the valve body body 302, thereby reducing the flow resistance experienced by the fluid passing through the valve body channel 324.

[0044] The first end segment 342 forms a circular straight tube. In other words, any radial cross-section of it is circular. For example... Figure 2A-2B As shown, its centerline is a straight line. It can be a straight pipe of the same diameter or a straight pipe of varying diameter. In other words, the first end section 342 is a straight pipe of varying diameter whose diameter gradually decreases or increases in the direction away from the middle section 344. In the embodiments of this application, when the valve body 302 is in the first position, the first valve body port 322 formed on the valve body ball surface 328 by the first end section 342 communicates with the first housing connection port 212, and when the valve body 302 is in the second position, the first valve body port 322 formed on the valve body ball surface 328 by the first end section 342 communicates with the second housing connection port 214. Therefore, the cross-sectional area of ​​the first valve body port 322 can be the smaller of the first housing connection port 212 and the second housing connection port 214.

[0045] The second end segment 346 forms a circular straight tube. In other words, any radial cross-section of it is circular. For example... Figure 2A-2B As shown, its centerline is a straight line. It can be a straight pipe of the same diameter or a straight pipe of varying diameter. In other words, the second end section 346 is a straight pipe of varying diameter that gradually decreases or increases in diameter in the direction away from the middle section 344. In the embodiments of this application, when the valve body 302 is in the first position, the second valve body port 326 formed on the valve body ball surface 328 by the second end section 346 communicates with the second housing connection port 214, and when the valve body 302 is in the second position, the second valve body port 326 formed on the valve body ball surface 328 by the second end section 346 communicates with the third housing connection port 216. Therefore, the cross-sectional area of ​​the second valve body port 326 can be the smaller of the second housing connection port 214 and the third housing connection port 216.

[0046] Traditional control valves typically feature a right-angled or other shaped valve body passage. However, the inventors of this application have discovered that the resistance of the control valve increases with the flow rate. This is especially true when the control valve is used in the retarder and engine cooling systems of vehicles with retarders, where flow rates can reach 500-800 L / min and pipe diameters are approximately 55-60 mm; in such cases, the resistance of the control valve can reach as high as 60 kPa. Therefore, traditional control valves are unsuitable for high fluid flow rates and are difficult to apply to the retarder and engine cooling systems of vehicles with retarders.

[0047] In the regulating valve 100 of this application, the valve body passage 324 forms a circular bend with a middle section 344, which effectively reduces resistance and thus adapts to larger flow rates. When the regulating valve 100 of this application is used in the retarder and engine cooling system of a vehicle with a retarder, even at a flow rate of 500 L / min-800 L / min, the resistance of the regulating valve 100 can be reduced to approximately 25 kPa. While significantly reducing flow resistance, the regulating valve 100 also reduces the power of the driving fluid device, thereby reducing the manufacturing cost of the cooling system. It should be noted that for high-flow-rate systems, the power of the driving device may be limited. In other words, since the regulating valve 100 needs to be installed in a vehicle, the size of the driving device for high flow rates is limited; therefore, reducing the resistance to the fluid while maintaining the volume of the regulating valve is beneficial.

[0048] Figure 3 Is using Figure 1A The diagram shows the system diagram of the retarder and engine cooling system of the regulating valve 100. Figure 3 As shown, the retarder and engine cooling system includes an engine 911, a retarder 912, a regulating valve 100, and connecting pipes. The power equipment for driving the flow of fluid (e.g., cooling fluid) is not shown. The engine 911 is used to drive the vehicle, while the retarder 912 is used to brake the vehicle. Both require a cooling system for cooling. More specifically, the engine 911 has an engine cooling passage 901. When cooling fluid flows through the engine cooling passage 901, the engine 911 can be cooled. The retarder 912 has a retarder cooling passage 902. When cooling fluid flows through the retarder cooling passage 902, the retarder 912 can be cooled. For simplicity, Figure 3 The cooling device and drive device for cooling fluid are omitted, and only the relationship between the engine 911, retarder 912, regulating valve 100 and connecting pipes is shown.

[0049] Specifically, the first branch pipe 614 of the regulating valve 100 is connected to the outlet end 942 of the retarder cooling channel 902 via a connecting pipe; the second branch pipe 616 of the regulating valve 100 is connected to the inlet end 931 of the engine cooling channel 901 via a connecting pipe; the second housing connection port 214 of the regulating valve 100 is connected to the outlet end 932 of the engine cooling channel 901 via a connecting pipe; and the third pipe 701 of the regulating valve 100 is connected to the inlet end 941 of the retarder cooling channel 902 via a connecting pipe. The valve body 302 of the regulating valve 100 can be in either the first or second position, thereby forming different cooling channels to cool the engine 911 and the retarder 912.

[0050] Figure 4A yes Figure 3 The diagram shows the system status of the retarder and engine cooling system when the valve body 302 is in the first position. Figure 4A As shown, when the vehicle is in normal operation, the valve body 302 is in the first position, allowing the first housing connection port 212 and the second housing connection port 214 to communicate with each other, thereby enabling the second branch pipe 616 to communicate with the second housing connection port 214 through the valve body 302. Specifically, cooling fluid flows out of the regulating valve 100 from the second branch pipe 616 and then flows into the engine cooling passage 901 from the inlet end 931, thereby cooling the engine 911. Subsequently, the cooling fluid flows out of the engine cooling passage 901 from the outlet end 932 and flows back into the regulating valve 100 from the second housing connection port 214.

[0051] Figure 4B yes Figure 3 The diagram shows the system status of the retarder and engine cooling system when the valve body 302 is in the second position. Figure 4B As shown, when the vehicle brakes, the valve body 302 is in the second position, allowing the second housing connection port 214 and the third housing connection port 216 to communicate with each other, thereby enabling the third pipe 701 to communicate with the second housing connection port 214 through the valve body 302. Specifically, cooling fluid flows out of the regulating valve 100 from the third pipe 701 and then flows into the retarder cooling channel 902 from the inlet end 941, thereby cooling the retarder 912. Subsequently, the cooling fluid flows out of the retarder cooling channel 902 from the outlet end 942 and then flows through the first branch pipe 614 and the second branch pipe 616 in sequence, and flows into the engine cooling channel 901 from the inlet end 931, thereby cooling the engine 911. Subsequently, the cooling fluid flows out of the engine cooling channel 901 from the outlet end 932 and flows back into the regulating valve 100 from the second housing connection port 214.

[0052] Therefore, when the vehicle is in different states, the valve body 302 in the regulating valve 100 of this application can be switched to different positions, thereby realizing different flow channels.

[0053] Although only some features of this application have been illustrated and described herein, many modifications and variations will be apparent to those skilled in the art. Therefore, it should be understood that the appended claims are intended to cover all such modifications and variations that fall within the essential spirit and scope of this application.

Claims

1. A regulating valve for use in a vehicle's retarder and engine cooling system, characterized in that... include: The housing has a cavity and an opening communicating with the cavity, a first housing connection port, a second housing connection port and a third housing connection port, the first housing connection port, the second housing connection port and the third housing connection port being configured to connect to the vehicle's retarder and engine cooling system; A cover, configured to close the opening and configured to support the drive component; as well as A valve body is connected to the drive component and rotatably mounted in the cavity via the drive component. The valve body has a valve body channel forming a first valve body port and a second valve body port. The valve body is configured to selectively connect the first housing connection port and the second housing connection port or the second housing connection port and the third housing connection port via the valve body channel. The valve body channel includes an intermediate section forming a bend, wherein, in the axial cross-section of the intermediate section, the intermediate section has an arc-shaped inner boundary and an outer boundary, the inner boundary and the outer boundary being concentric. The middle section is a circular bend with a first diameter; The valve body includes a valve body body, the valve body body having a valve body ball surface, and the valve body ball surface having a second diameter; and The ratio of the first diameter to the second diameter is in the range of 1:1.5 to 1:2.

5.

2. The regulating valve according to claim 1, characterized in that: The valve body channel further includes a first end section and a second end section, the first end section, the middle section and the second end section are connected in sequence, and the first end section and the second end section are respectively located at the first valve body port and the second valve body port; The first end segment and the second end segment form a straight pipe.

3. The regulating valve according to claim 2, characterized in that: The first end section and / or the second end section are variable diameter straight pipes whose diameter gradually decreases or increases in the direction away from the middle section.

4. The regulating valve according to claim 1, characterized in that: The valve body channel is disposed in the valve body body, and the first valve body port and the second valve body port are located on the surface of the valve body ball; The cover includes a cover body and a cover extension. The cover extension extends downward from the lower surface of the cover body. The inner surface of the cover extension is a spherical surface that matches the ball surface of the valve body. The cover extension is located between the valve body and the housing.

5. The regulating valve according to claim 4, characterized in that: The cover extension is provided with a first recess, a second recess and a third recess, which are formed by recessing upward from the lower edge of the cover extension; The first notch, the second notch, and the third notch are respectively provided with corresponding connections to the first housing connection port, the second housing connection port, and the third housing connection port, so that the cover extension does not obstruct the communication between the first housing connection port, the second housing connection port, and the third housing connection port and the first valve body port and the second valve body port.

6. The regulating valve according to claim 3, characterized in that: The valve body has a spherical center; The housing has a central portion corresponding to the height of the ball's center, and the inner wall of the housing located below the central portion is generally a spherical surface that matches the ball surface of the valve body.

7. The regulating valve according to claim 5, characterized in that: The gap between the inner surface of the cover extension and the valve body, and the gap between the inner wall of the housing and the ball surface of the valve body, are in the range of less than or equal to 2.5 mm.

8. The regulating valve according to claim 1, characterized in that: The flow rate of the fluid flowing through the regulating valve is in the range of 500 L / min to 800 L / min.

9. A vehicle retarder and engine cooling system, characterized in that... include: The regulating valve as described in any one of claims 1-8; The first branch pipe and the second branch pipe are connected to the first housing connection port of the housing. The third pipe is connected to the third housing connection port of the housing; Connecting pipes; Engine cooling passages; and Retarder cooling channel; The first branch pipe of the regulating valve is connected to the outlet end of the retarder cooling channel through the connecting pipe; the second branch pipe of the regulating valve is connected to the inlet end of the engine cooling channel through the connecting pipe; the second housing connection port is connected to the outlet end of the engine cooling channel through the connecting pipe; and the third pipe of the regulating valve is connected to the inlet end of the retarder cooling channel through the connecting pipe.

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