Pressure control valve, brake system and commercial vehicle

Abstract

The application relates to a pressure control valve, a brake system and a commercial vehicle. The pressure control valve comprises a valve cavity, an air inlet end and an air outlet end in communication with the valve cavity, a one-way valve is arranged between the air inlet end and the air outlet end, the one-way valve is configured to make the air outlet end gas flow to the air inlet end through the one-way valve in a non-braking state, and when the pressure relief port cannot normally relieve pressure, the one-way valve arranged between the air inlet end and the air outlet end makes the air in the valve cavity flow back to the air inlet end through the one-way valve and be discharged from the air inlet end, so that the vehicle braking state can be timely released, a large amount of heat generated by long-time friction between brake pads and brake discs is avoided, driving resistance is reduced, and fuel consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of braking, and in particular to a pressure control valve, a braking system, and a commercial vehicle. Background Technology

[0002] During driving, when the driver presses the brake pedal, air pressure enters the chamber from the inlet of the pressure control valve, and brake pressure is output from the outlet. During braking, the diaphragm at the pressure relief port remains closed. When braking ends, the diaphragm at the pressure relief port opens, allowing excess gas in the chamber to escape. In cold and humid conditions, if the pressure relief port freezes, gas cannot escape, potentially leading to brake failure and the vehicle remaining in a braking state. Prolonged friction between the brake pads and discs generates significant heat, potentially causing brake erosion and, in severe cases, even vehicle fire. Furthermore, continuous braking increases drag and fuel consumption. Utility Model Content

[0003] To address the issue of vehicles remaining in a braking state for an extended period due to the inability to promptly expel gas from the exhaust end after braking, this application provides a pressure control valve, including a valve chamber, an inlet end communicating with the valve chamber, and an outlet end. A one-way valve is provided between the inlet end and the outlet end, and the one-way valve is configured such that, in a non-braking state, gas from the outlet end flows through the one-way valve to the inlet end.

[0004] Furthermore, the pressure control valve also includes a pressure relief port connected to the outlet end. When the pressure relief amount of the pressure relief port is less than a preset threshold, the gas at the outlet end flows to the inlet end through the one-way valve.

[0005] Furthermore, the check valve is a ball valve type check valve.

[0006] Furthermore, a gas passage isolated from the valve cavity is provided between the air inlet end and the air outlet end, and the one-way valve is disposed in the gas passage.

[0007] Furthermore, within the valve cavity, a first one-way membrane is provided between the air inlet and the air outlet, and a second one-way membrane is provided between the air outlet and the pressure relief port. The first one-way membrane allows gas to flow from the air inlet to the air outlet, and the second one-way membrane allows gas to flow from the air outlet to the pressure relief port.

[0008] Furthermore, the first unidirectional membrane and the second unidirectional membrane are made of one of nitrile rubber, neoprene rubber, polyurethane, or polytetrafluoroethylene.

[0009] Furthermore, the first unidirectional membrane and the second unidirectional membrane are made of the same material.

[0010] This application also provides a braking system including the pressure control valve described above.

[0011] Furthermore, the air inlet is connected to the brake line; the air outlet is connected to the brake chamber.

[0012] This application also provides a commercial vehicle including the aforementioned braking system.

[0013] This application relates to pressure control valves, braking systems, and commercial vehicles. The pressure control valve includes a valve chamber, an inlet end communicating with the valve chamber, and an outlet end. A one-way valve is provided between the inlet end and the outlet end. The one-way valve is configured such that, in the non-braking state, gas from the outlet end flows to the inlet end through the one-way valve. When the pressure relief port cannot release pressure normally, the one-way valve between the inlet end and the outlet end allows the gas in the valve chamber to flow back to the inlet end through the one-way valve and be discharged from the inlet end. This can promptly release the vehicle's braking state, avoid the brake pads and brake discs from rubbing together for a long time and generating a large amount of heat, thereby reducing driving resistance and reducing fuel consumption. Attached Figure Description

[0014] Figure 1 This is a front view of the pressure control valve of this application (labeled AA);

[0015] Figure 2 for Figure 1 Sectional view along AA;

[0016] Figure 3 This is a front view of the pressure control valve of this application (marked BB);

[0017] Figure 4 for Figure 3 A cross-sectional view along BB;

[0018] Figure 5 This is a schematic diagram of the one-way valve structure of this application.

[0019] Explanation of reference numerals in the attached figures

[0020] 1. Pressure control valve; 2. Valve chamber; 3. Inlet end; 31. First one-way diaphragm; 32. Second one-way diaphragm; 4. Outlet end; 5. Pressure relief port; 6. Check valve. Detailed Implementation

[0021] To gain a more detailed understanding of the features and technical content of the embodiments disclosed herein, the following description is provided in conjunction with the accompanying drawings. Figure 1-5The implementation of the embodiments of this disclosure is described in detail. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, various details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other instances, well-known structures and apparatuses may be simplified in their depiction to simplify the drawings.

[0022] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0023] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily used to better describe the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0024] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral structure; those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0026] To provide a better understanding of the purpose, structure, features, and functions of this application, detailed descriptions are provided below with reference to specific embodiments.

[0027] To address the issue of vehicles remaining in a braking state for an extended period due to the inability to promptly expel gas from the exhaust end after braking, this application provides a pressure control valve 1, comprising a valve chamber 2, an intake end 3 and an exhaust end 4 communicating with the valve chamber 2, wherein a one-way valve 6 is provided between the intake end 3 and the exhaust end 4, and the one-way valve 6 is configured such that, in the non-braking state, gas from the exhaust end 4 flows through the one-way valve 6 to the intake end 3.

[0028] The pressure control valve 1 has a valve chamber 2 inside, which is used to contain and guide the flow of gas in the pressure control valve 1 during braking. The inlet end 3 is used to receive the gas pressure required during braking, and the outlet end 4 transmits the gas pressure to the brake to achieve braking. The one-way valve 6 is located between the inlet end 3 and the outlet end 4. The one-way valve 6 is configured to allow gas from the outlet end 4 to flow to the inlet end 3 through the one-way valve 6 in the non-braking state, while preventing gas from the outlet end 4 from flowing to the inlet end 3 through the one-way valve 6 in the braking state.

[0029] When the braking system is in braking condition, the gas pressure at the intake end 3 is higher than that at the outlet end 4, and the one-way valve 6 is closed, ensuring that gas can only flow from the intake end 3 to the outlet end 4 in one direction, providing stable pressure for braking. When the brake is released, the gas pressure at the outlet end 4 decreases, and the one-way valve 6 opens, allowing gas to flow back from the outlet end 4 to the intake end 3, quickly expelling residual gas in the braking system and preventing the vehicle from being in a braking state for an extended period.

[0030] The pressure control valve 1 also includes a pressure relief port 5 connected to the outlet end 4. When the pressure relief amount of the pressure relief port 5 is less than a preset threshold, the gas at the outlet end 4 flows to the inlet end 3 through the one-way valve 6.

[0031] The pressure relief port 5 is connected to the air outlet 4 and is used to release the gas pressure at the air outlet 4 when the brake is released, that is, when the brake is not applied. When the brake is released, the gas pressure at the air outlet 4 decreases. If the pressure relief amount of the pressure relief port 5 is less than the preset threshold within a certain period of time due to freezing or other reasons, the gas is allowed to flow back from the air outlet 4 to the air inlet 3 through the one-way valve 6.

[0032] It should be noted that when the brake is released, if the pressure relief port 5 releases pressure within a certain time period and the pressure relief amount is not less than the preset threshold, then the gas will be discharged from the outlet end 4 through the pressure relief port 5. At this time, the one-way valve 6 set at the outlet end 4 and the inlet end 3 will be closed, that is, the gas at the outlet end 4 will not flow back to the inlet end 3 through the one-way valve 6.

[0033] When the pressure relief port 5 cannot release pressure normally, a one-way valve 6 is set between the air inlet end 3 and the air outlet end 4 so that the gas in the valve chamber 2 flows back to the air inlet end 3 through the one-way valve 6 and is discharged from the air inlet end 3. This can release the vehicle braking state in time, avoid the brake pads and brake discs from rubbing for a long time and generating a lot of heat, thereby reducing driving resistance and reducing fuel consumption.

[0034] The one-way valve 6 is a ball valve type one-way valve, see [link / reference] Figure 5 The ball valve type check valve includes a ball, a valve seat, and a spring. The spring provides the closing force, so that the ball fits tightly against the valve seat in the non-braking state to block the flow of gas.

[0035] Specifically, during braking, when the braking system is working, the gas pressure at the intake end 3 is higher than that at the outlet end 4. Under the action of the gas pressure at the intake end 3, the ball tightly adheres to the valve seat, preventing gas from flowing back to the intake end 3.

[0036] When the pressure relief port 5 is not in a braking state and the pressure relief amount reaches or exceeds the preset threshold, the gas at the outlet 4 is discharged through the pressure relief port 5, the gas pressure at the outlet 4 decreases, and the ball of the ball valve type check valve is tightly attached to the valve seat to maintain the closed state.

[0037] When the brake is not applied and the pressure relief at the pressure relief port 5 is less than the preset threshold, the brake is released and the gas pressure at the outlet 4 decreases. If the pressure relief at the pressure relief port 5 is less than the preset threshold, the gas pressure at the outlet 4 is greater than the gas pressure at the inlet 3. The gas pressure at the outlet 4 exerts force on the spring of the one-way valve and pushes the ball open, allowing gas to flow back from the outlet 4 through the ball channel to the inlet 3, quickly eliminating residual gas in the braking system.

[0038] A gas passage is provided between the air inlet end 3 and the air outlet end 4, which is isolated from the valve chamber 2, and the one-way valve 6 is disposed in the gas passage.

[0039] This application provides a gas passage between the inlet end 3 and the outlet end 4, which is isolated from the valve chamber 2. The gas passage guides the flow of gas between the inlet end 3 and the outlet end 4. The gas passage is isolated from the valve chamber 2 to reduce interference with the gas flow within the valve chamber 2.

[0040] This application does not impose specific limitations on the extended shape or size of the gas passage. For example, the gas passage may be a straight line or a curved passage with an arc; the inner diameter of the gas passage can be determined according to the gas flow and pressure requirements of the braking system to ensure that the gas can pass through smoothly.

[0041] Inside the valve chamber 2, a first one-way membrane 31 is provided between the air inlet end 3 and the air outlet end 4, and a second one-way membrane 32 is provided between the air outlet end 4 and the pressure relief port 5. The first one-way membrane 31 allows gas to flow from the air inlet end 3 to the air outlet end 4, and the second one-way membrane 32 allows gas to flow from the air outlet end 4 to the pressure relief port 5.

[0042] A first one-way diaphragm 31 is disposed between the inlet end 3 and the outlet end 4 within the valve chamber 2. The first one-way diaphragm 31 allows gas to flow from the inlet end 3 to the outlet end 4, but prevents gas from flowing from the outlet end 4 to the inlet end 3. During braking, the gas pressure at the inlet end 3 is higher than that at the outlet end 4, and the first one-way diaphragm 31 opens, allowing gas to flow to the outlet end 4. After the brake is released, if the gas pressure at the outlet end 4 attempts to flow back into the inlet end 3, the first one-way diaphragm 31 closes, preventing gas from flowing to the inlet end 3.

[0043] The second one-way diaphragm 32 is disposed between the outlet end 4 and the pressure relief port 5 within the valve chamber 2. The second one-way diaphragm 32 allows gas to flow from the outlet end 4 to the pressure relief port 5, but prevents gas from flowing back from the pressure relief port 5 into the outlet end 4. During braking, if the gas pressure at the outlet end 4 is higher than the set pressure at the pressure relief port 5, the second one-way diaphragm 32 opens, allowing gas to flow to the pressure relief port 5 for pressure relief; when the brake is released or the gas pressure at the outlet end 4 is lower than the set pressure at the pressure relief port 5, the second one-way diaphragm 32 closes, preventing gas from flowing back from the pressure relief port 5 into the outlet end 4.

[0044] The first unidirectional membrane 31 and the second unidirectional membrane 32 are made of one of nitrile rubber, neoprene rubber, polyurethane or polytetrafluoroethylene.

[0045] Both the first unidirectional membrane 31 and the second unidirectional membrane 32 are composed of an elastic thin film material and a membrane base. The thin film material can deform under the action of gas pressure, allowing gas to pass through; when the gas pressure is reversed, the thin film material tightly adheres to the membrane base, preventing gas flow.

[0046] The first unidirectional diaphragm 31 and the second unidirectional diaphragm 32 are made of one of the following materials: nitrile rubber, neoprene rubber, polyurethane, or polytetrafluoroethylene. These materials all have good elasticity, corrosion resistance, and wear resistance, which can meet the requirements for the use of unidirectional diaphragms in braking systems.

[0047] The first unidirectional membrane 31 and the second unidirectional membrane 32 are made of the same material. For example, the first unidirectional membrane 31 and the second unidirectional membrane 32 are made of the same material, and are selected from one of nitrile rubber, neoprene rubber, polyurethane, or polytetrafluoroethylene. Of course, the first unidirectional membrane 31 and the second unidirectional membrane 32 can also be made of different materials.

[0048] This application also provides a braking system, including the pressure control valve 1 described above.

[0049] The air inlet 3 of the pressure control valve 1 is connected to the brake line; the air outlet 4 is connected to the brake chamber.

[0050] The pressure control valve 1 has an inlet 3 connected to the brake line to receive gas pressure from the brake system, and an outlet 4 connected to the brake chamber to transmit the controlled gas pressure to the brake chamber to achieve the braking function.

[0051] When the brake pedal is depressed, the gas pressure in the brake line increases and enters the pressure control valve 1 through the inlet end 3. The first one-way diaphragm 31 allows gas to flow from the inlet end 3 to the outlet end 4, enter the brake chamber, and drive the brake to work, thus achieving the braking effect.

[0052] When the brake pedal is released, the gas pressure in the brake lines decreases. At this time, the second one-way diaphragm 32 allows some of the gas in the brake chamber to be released through the pressure relief port 5, thereby reducing the pressure in the brake chamber and releasing the brake.

[0053] A one-way valve 6 is installed between the air inlet 3 and the air outlet 4. The one-way valve 6 is configured to allow gas from the air outlet 4 to flow to the air inlet 3 through the one-way valve 6 in the non-braking state.

[0054] This allows the gas in the valve chamber 2 to flow back to the intake end 3 through the one-way valve 6 and be discharged from the intake end 3, which can release the vehicle's braking state in time, avoid the brake pads and brake discs from rubbing against each other for a long time and generating a lot of heat, thereby reducing driving resistance and reducing fuel consumption.

[0055] This application also provides a commercial vehicle including the aforementioned braking system.

[0056] This application relates to a pressure control valve 1, a braking system, and a commercial vehicle. The pressure control valve 1 includes a valve chamber 2, an inlet end 3 and an outlet end 4 communicating with the valve chamber 2. A one-way valve 6 is provided between the inlet end 3 and the outlet end 4. The one-way valve 6 is configured such that, in the non-braking state, gas from the outlet end 4 flows to the inlet end 3 through the one-way valve 6. When the pressure relief port 5 cannot release pressure normally, the one-way valve 6 between the inlet end 3 and the outlet end 4 allows the gas in the valve chamber 2 to flow back to the inlet end 3 through the one-way valve 6 and be discharged from the inlet end 3. This can promptly release the vehicle's braking state, avoid the brake pads and brake discs from rubbing together for a long time and generating a large amount of heat, thereby reducing driving resistance and reducing fuel consumption.

[0057] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "specifically," or "optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0058] This application has been described with reference to the above-mentioned embodiments; however, the above embodiments are merely examples for implementing this application. It must be noted that the disclosed embodiments do not limit the scope of this application. On the contrary, any modifications and refinements made without departing from the spirit and scope of this application are within the scope of patent protection of this application.

Claims

1. A pressure control valve, comprising a valve chamber (2), an inlet end (3) communicating with the valve chamber (2), and an outlet end (4), characterized in that, A one-way valve (6) is provided between the air inlet (3) and the air outlet (4). The one-way valve (6) is configured such that, in the non-braking state, the gas from the air outlet (4) flows to the air inlet (3) through the one-way valve (6).

2. The pressure control valve according to claim 1, characterized in that, The pressure control valve (1) also includes a pressure relief port (5) connected to the outlet end (4). When the pressure relief amount of the pressure relief port (5) is less than a preset threshold, the gas from the outlet end (4) flows to the inlet end (3) through the one-way valve (6).

3. The pressure control valve according to claim 1, characterized in that, The one-way valve (6) is a ball valve type one-way valve.

4. The pressure control valve according to claim 1, characterized in that, A gas passage is provided between the air inlet (3) and the air outlet (4) and is isolated from the valve chamber (2), and the one-way valve (6) is located in the gas passage.

5. The pressure control valve according to claim 2, characterized in that, Inside the valve chamber (2), a first one-way membrane (31) is provided between the air inlet (3) and the air outlet (4), and a second one-way membrane (32) is provided between the air outlet (4) and the pressure relief port (5). The first one-way membrane (31) allows gas to flow from the air inlet (3) to the air outlet (4), and the second one-way membrane (32) allows gas to flow from the air outlet (4) to the pressure relief port (5).

6. The pressure control valve according to claim 5, characterized in that, The first unidirectional membrane (31) and the second unidirectional membrane (32) are made of one of nitrile rubber, neoprene rubber, polyurethane or polytetrafluoroethylene.

7. The pressure control valve according to claim 6, characterized in that, The first unidirectional membrane (31) and the second unidirectional membrane (32) are made of the same material.

8. A braking system, characterized in that, The pressure control valve (1) includes any one of claims 1-7 above.

9. The braking system according to claim 8, characterized in that, The air inlet (3) is connected to the brake line; the air outlet (4) is connected to the brake chamber.

10. A commercial vehicle, characterized in that, The braking system includes any one of claims 8-9 above.

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