Parking brake control system and commercial vehicle

Abstract

The utility model discloses a parking brake control system and a commercial vehicle. The parking brake control system comprises an air processing unit, a hand brake valve and a parking relay valve. The air processing unit comprises a dryer and a four-loop protection valve, an air inlet of the hand brake valve is connected with a first air outlet of the four-loop protection valve, so that when the hand brake valve is promoted to be in a parking state, an air outlet of the parking relay valve is suitable for being communicated with a brake air chamber of a wheel, and when the hand brake valve is in the parking state, the air outlet of the parking relay valve is communicated with the brake air chamber; and the first air inlet of the parking relay valve is communicated with the air outlet of the parking relay valve. According to the parking brake control system, a gas circuit connection mode is simply transformed, under the condition that a gas storage cylinder is not added, the parking pressure reduction capacity is improved, the pressure reduction time is shortened, the whole vehicle cost and the arrangement space are saved, and the arrangement and performance index requirements of vehicle types with complex configurations are met.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, in particular to a parking brake control system and a commercial vehicle. Background Art

[0002] In the related art, due to the increasing complexity of the configuration of commercial vehicles and excessive content in the chassis layout, it is impossible to arrange all the air storage tanks. Most manufacturers reduce the air storage tanks (auxiliary and parking) by measures such as increasing the vehicle pressure and optimizing the internal structure of the auxiliary power unit. However, since the parking pressure cannot be increased, the air in the front and rear axle air storage tanks flows back through the inside of the auxiliary power unit to supplement the air for parking. The time is too long, and the parking cannot take effect and be released quickly. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a parking brake control system, which can simply transform the air circuit connection method, improve the parking pressure reduction ability without increasing the air storage tank, shorten the pressure reduction time, save the vehicle cost and layout space, and meet the layout and performance index requirements of complex configuration models.

[0004] A first object of the utility model is to provide a parking brake control system.

[0005] A second object of the utility model is to provide a commercial vehicle.

[0006] To solve the above problems, an embodiment of the first aspect of the utility model provides a parking brake control system, including: an air treatment unit, the air treatment unit includes a dryer and a four-circuit protection valve, the input end of the dryer is connected to a compressor, and the output end of the dryer is connected to the air inlet of the four-circuit protection valve; a hand brake valve, the air inlet of the hand brake valve is connected to the first air outlet of the four-circuit protection valve to actuate the hand brake valve to the parking state; a parking relay valve, the air outlet of the parking relay valve is adapted to be connected to the brake air chamber of the wheel, the first air inlet of the parking relay valve is connected to the first air outlet of the four-circuit protection valve and the air inlet of the hand brake valve, the second air inlet of the parking relay valve is connected to the air outlet of the hand brake valve, the first air inlet of the parking relay valve is further connected to the parking air replenishing port of the air treatment unit, the parking air replenishing port is connected to the output end of the dryer; when the hand brake valve is in the parking state, the first air inlet of the parking relay valve is communicated with the air outlet of the parking relay valve.

[0007] According to the parking brake control system of the embodiment of the present utility model, the first air inlet of the parking relay valve is connected to the first air outlet of the four-circuit protection valve and the parking air replenishing port of the air treatment unit. Without adding an air storage tank, the air circuit connection mode is simply transformed to increase the air intake of the parking relay valve for convenient and quick parking. At the same time, the second air inlet of the parking relay valve is connected to the air outlet of the hand brake valve to enhance the parking pressure reduction ability, shorten the pressure reduction time, save the vehicle cost and layout space, and meet the layout and performance index requirements of complex configuration vehicles.

[0008] In some embodiments, an overflow valve is provided on the pipeline between the first air inlet of the parking relay valve and the parking air replenishing port to stabilize the pressure.

[0009] In some embodiments, a pressure limiting valve is further provided between the overflow valve and the first air inlet of the parking relay valve to limit the pressure.

[0010] In some embodiments, the air treatment unit further includes: a first one-way valve, the first end of the first one-way valve is connected to the output end of the dryer, and the second end of the first one-way valve is connected to the parking air replenishing port.

[0011] In some embodiments, the parking brake control system further includes: an anti-lock solenoid valve, the first end of the anti-lock solenoid valve is connected to the first air inlet of the parking relay valve, the second end of the anti-lock solenoid valve is connected to the second air inlet of the parking relay valve, and the third end of the anti-lock solenoid valve is the first exhaust port; when the hand brake valve is in the parking state, the anti-lock solenoid valve is powered off, and the second end of the anti-lock solenoid valve is communicated with the third end of the anti-lock solenoid valve; when the hand brake valve is in the driving state, the anti-lock solenoid valve is powered on, and the first end of the anti-lock solenoid valve is communicated with the second end of the anti-lock solenoid valve.

[0012] In some embodiments, the parking brake control system further includes: a control unit, the control unit is connected to the hand brake valve and the anti-lock solenoid valve, and is used to control the on-off of the anti-lock solenoid valve according to the state of the hand brake valve.

[0013] In some embodiments, the parking brake control system further includes: a second one-way valve, the first end of the second one-way valve is connected to the air outlet of the hand brake valve, and the second end of the second one-way valve is connected to the second air inlet of the parking relay valve and the second end of the anti-lock solenoid valve.

[0014] In some embodiments, the hand brake valve further includes a second exhaust port, when the hand brake valve is in the driving state, the air inlet of the hand brake valve is communicated with the second exhaust port.

[0015] In some embodiments, the parking relay valve further includes a third exhaust port. When the hand brake valve is in the driving state, the first air inlet of the parking relay valve is disconnected from the air outlet of the parking relay valve, and the air outlet of the parking relay valve is communicated with the third exhaust port.

[0016] The second object of the present invention is to provide a commercial vehicle, including the parking brake control system described in the above embodiments.

[0017] For the commercial vehicle according to the embodiments of the present invention, the air circuit connection mode of the parking brake control system is simple and the components are few. Without increasing the air storage tank, the air intake of the parking relay valve is increased, the parking pressure reduction capacity is improved, the pressure reduction time is shortened, the overall vehicle cost and the layout space are saved, and the layout and performance index requirements of complex configuration models are met.

[0018] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a schematic diagram of a parking brake control system according to an embodiment of the present invention;

[0021] Figure 2 is a structural block diagram of a parking brake control system according to an embodiment of the present invention;

[0022] Figure 3 is a structural block diagram of a commercial vehicle according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Commercial vehicle 200;

[0025] Parking brake control system 100;

[0026] Air treatment unit 110; Hand brake valve 120; Parking relay valve 130; Overflow valve 140; Pressure limiting valve 150; Anti-skid drive solenoid valve 160; Control unit 170; Second one-way valve 180;

[0027] Dryer 111; four-circuit protection valve 112; first check valve 113; first air outlet 25 of the four-circuit protection valve; parking air supply port 29; air inlet 121 of the hand brake valve; air outlet 122 of the hand brake valve; second exhaust port 123; first air inlet 1 of the parking relay valve; air outlet 2 of the parking relay valve; second air inlet 4 of the parking relay valve; third exhaust port 133; first exhaust port 163. Detailed implementation mode

[0028] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0029] In the first aspect of the present invention, an embodiment provides a parking brake control system, as Figure 1 shown, the parking brake control system 100 includes: an air treatment unit 110, a hand brake valve 120, and a parking relay valve 130.

[0030] Among them, the air treatment unit 110 includes a dryer 111 and a four-circuit protection valve 112. The input end of the dryer 111 is connected to the compressor, and the output end of the dryer 111 is connected to the air inlet of the four-circuit protection valve 112; the air inlet 121 of the hand brake valve is connected to the first air outlet 25 of the four-circuit protection valve to actuate the hand brake valve 120 to the parking state; the air outlet 2 of the parking relay valve is adapted to be connected to the brake air chamber of the wheel. The first air inlet 1 of the parking relay valve is connected to the first air outlet 25 of the four-circuit protection valve and the air inlet 121 of the hand brake valve. The second air inlet 4 of the parking relay valve is connected to the air outlet 122 of the hand brake valve. The first air inlet 1 of the parking relay valve is also connected to the parking air supply port 29 of the air treatment unit 110, and the parking air supply port 29 is connected to the output end of the dryer 111.

[0031] Specifically, the four-circuit protection valve 112 is an important component in the commercial vehicle braking system, mainly used for the shunt and protection of the air circuit system. The four-circuit protection valve 112 is arranged by four pressure-limiting check valves in a certain relationship and may be additionally provided with other functional mechanisms to realize the shunt supply of the air source in the commercial vehicle braking system, ensure the independent and normal operation of each circuit, and the four-circuit protection valve 112 can divide the whole vehicle air circuit into four circuits that are both interconnected and independent. When any one circuit fails, it does not affect the normal operation and inflation of other circuits, thus ensuring driving safety.

[0032] The vehicle compressor transmits compressed air into the dryer 111 in the air treatment unit 110 to dry the compressed air and remove moisture. After that, the dryer 111 transmits the compressed air into the four-circuit protection valve 112 and the first one-way valve 113. The air inlet of the hand brake valve 121 receives the compressed air output from the first air outlet 25 of the four-circuit protection valve and transmits the compressed air from the air outlet of the hand brake valve 122 to the second air inlet 4 of the parking relay valve. At the same time, the first air inlet 1 of the parking relay valve can receive the compressed air from the first air outlet 25 of the four-circuit protection valve and the parking air supply port 29. Without adding an air storage tank, the air intake of the first air inlet 1 of the parking relay valve is increased. When the hand brake valve 120 is in the parking state, the first air inlet 1 of the parking relay valve is connected to the air outlet 2 of the parking relay valve, so that the gas input into the combined brake chamber from the air outlet 2 of the parking relay valve increases, the air pressure in the combined brake chamber becomes larger, and the braking effect of the vehicle is improved.

[0033] According to the parking brake control system of the embodiment of the present invention, the first air inlet of the parking relay valve is connected to the first air outlet of the four-circuit protection valve and the parking air supply port of the air treatment unit. Without adding an air storage tank, the air circuit connection mode is simply modified to increase the air intake of the parking relay valve for convenient and quick parking. At the same time, the second air inlet of the parking relay valve is connected to the air outlet of the hand brake valve to improve the parking pressure reduction ability, shorten the pressure reduction time, save the vehicle cost and layout space, and meet the layout and performance index requirements of complex configuration vehicles.

[0034] In some embodiments, such as Figure 1 shown, the parking brake control system 100 further includes: a relief valve 140.

[0035] Wherein, a relief valve 140 is arranged on the pipeline between the first air inlet 1 of the parking relay valve and the parking air supply port 29 to stabilize the pressure.

[0036] Specifically, the relief valve 140 is a pressure control valve, which mainly plays the roles of constant pressure overflow, pressure stabilization, system unloading and safety protection in the parking brake control system 100. When the pressure of the relief valve 140 exceeds the set value, the relief valve 140 will open, so as to keep the system pressure constant.

[0037] In order to solve the problem of insufficient air intake at the first air inlet 1 of the parking relay valve, the parking air supply port 29 is connected to the first air inlet 1 of the parking relay valve, so as to increase the air intake of the first air inlet 1 of the parking relay valve. At the same time, a relief valve 140 is added to protect the air pressure of the circuit of the parking brake control system 100 and avoid the failure of the circuit of the parking brake control system 100 affecting the parking brake safety.

[0038] In some embodiments, such as Figure 1 shown, the parking brake control system 100 further includes: a pressure limiting valve 150.

[0039] Among them, a pressure limiting valve 150 is provided between the overflow valve 140 and the first air inlet 1 of the parking relay valve to limit the pressure.

[0040] Specifically, the pressure limiting valve 150 is widely used in various occasions where the pressure of pipelines and equipment needs to be controlled. The pressure limiting valve 150 mainly plays a role in protecting the safety of pipelines and equipment in the parking brake control system 100. When the pressure in the pipeline of the parking brake control system 100 exceeds the set value, the pressure limiting valve 150 will automatically open and discharge a part of the gas from the bypass to reduce the pressure in the parking brake control system 100 to prevent damage to the pipeline or equipment.

[0041] In some embodiments, as Figure 1 shown, the air treatment unit 110 further includes: a first check valve 113.

[0042] Among them, the first end of the first check valve 113 is connected to the output end of the dryer 111, and the second end of the first check valve 113 is connected to the parking air supply port 29.

[0043] Specifically, the vehicle compressor transmits compressed air into the dryer 111 in the air treatment unit 110 to dry the compressed air to remove moisture. Then, the dryer 111 transmits the compressed air into the first check valve 113. The second end of the first check valve 113 is connected to the parking air supply port 29, and the compressed air is transmitted to the first air inlet 1 of the parking relay valve through the parking air supply port 29. The first check valve 113 can prevent the air pressure at the first air inlet 1 of the parking relay valve from decreasing due to gas reflux.

[0044] In some embodiments, as Figure 1 shown, the parking brake control system 100 further includes: an anti-skid drive solenoid valve 160.

[0045] Among them, the first end of the anti-skid drive solenoid valve 160 is connected to the first air inlet 1 of the parking relay valve, the second end of the anti-skid drive solenoid valve 160 is connected to the second air inlet 4 of the parking relay valve, and the third end of the anti-skid drive solenoid valve 160 is the first exhaust port 163.

[0046] Specifically, the pipelines of the first air inlet 1 and the second air inlet 4 of the parking relay valve are connected through the anti-skid drive solenoid valve 160, and a switch is added to the hand brake valve 120 to control the on / off of the anti-skid drive solenoid valve 160. When the hand brake valve 120 is in the parking state, the anti-skid drive solenoid valve 160 is de-energized, and the second end of the anti-skid drive solenoid valve 160 is connected to the third end of the anti-skid drive solenoid valve 160. At this time, the hand brake valve 120 is pulled up to the parking state, the anti-skid drive solenoid valve 160 is de-energized, and the second end of the anti-skid drive solenoid valve 160 is connected to the third end of the anti-skid drive solenoid valve 160. The excess gas at the second air inlet 4 of the parking relay valve is released through the third end of the anti-skid drive solenoid valve 160, that is, the first exhaust port 163, so as to achieve rapid parking.

[0047] When the hand brake valve 120 is in the driving state, the anti-skid drive solenoid valve 160 is energized, and the first end of the anti-skid drive solenoid valve 160 is connected to the second end of the anti-skid drive solenoid valve 160. At this time, the hand brake valve 120 is placed in the driving state, the anti-skid drive solenoid valve 160 is energized, and the first end of the anti-skid drive solenoid valve 160 is connected to the second end of the anti-skid drive solenoid valve 160. The gas is quickly replenished from the first air inlet 1 of the parking relay valve, so as to achieve rapid release of parking.

[0048] In some embodiments, as Figure 2 shown, the parking brake control system 100 further includes: a control unit 170.

[0049] Wherein, the control unit 170 is connected to the hand brake valve 120 and the anti-skid drive solenoid valve 160, and is used to control the on / off power supply of the anti-skid drive solenoid valve 160 according to the state of the hand brake valve 120.

[0050] Specifically, when the hand brake valve 120 is pulled up to the parking state, the control unit 170 receives the signal sent by the hand brake valve 120, so as to control the anti-skid drive solenoid valve 160 to be de-energized; when the hand brake valve 120 is placed in the driving state, the control unit 170 receives the signal sent by the hand brake valve 120, so as to control the anti-skid drive solenoid valve 160 to be energized.

[0051] In some embodiments, as Figure 1 shown, the parking brake control system 100 further includes: a second one-way valve 180.

[0052] Wherein, the first end of the second one-way valve 180 is connected to the air outlet 122 of the hand brake valve, and the second end of the second one-way valve 180 is connected to the second air inlet 4 of the parking relay valve and the second end of the anti-skid drive solenoid valve 160.

[0053] Specifically, the air outlet 122 of the hand brake valve transmits the compressed air to the second one-way valve 180, and the second one-way valve 180 is connected to the second air inlet 4 of the parking relay valve. The compressed air output from the air outlet 122 of the hand brake valve is transmitted to the second air inlet 4 of the parking relay valve. The second one-way valve 180 can prevent gas backflow at the second air inlet 4 of the parking relay valve.

[0054] In some embodiments, Figure 1 As shown, the hand brake valve 120 further includes: a second exhaust port 123 .

[0055] Specifically, when the hand brake valve 120 is in the driving state, the air inlet 121 of the hand brake valve is connected to the second exhaust port 123, and the compressed air output from the first air outlet 25 of the four-circuit protection valve is discharged from the second exhaust port 123, reducing the air pressure at the parking relay valve 130, so that the vehicle can drive normally.

[0056] In some embodiments, Figure 1 As shown, the parking relay valve 130 further includes a third exhaust port 133 .

[0057] Specifically, when the hand brake valve 120 is in the driving state, the first air inlet 1 of the parking relay valve is disconnected from the air outlet 2 of the parking relay valve, and the air outlet 2 of the parking relay valve is connected to the third exhaust port 133, so that the compressed air output by the air processing unit 110 cannot be transmitted to the air outlet 2 of the parking relay valve through the first air inlet 1 of the parking relay valve. At the same time, the air outlet 2 of the parking relay valve is connected to the third exhaust port 133, and the excess gas in the vehicle's compound brake air chamber is discharged through the third exhaust port 133, thereby reducing the air pressure in the compound brake air chamber and allowing the vehicle to drive normally.

[0058] For example, the utility model designs a solution for improving parking response, by adding a relief valve 140, a pressure limiting valve 150 and a driving anti-skid solenoid valve 160, and increasing the air intake of the first air inlet 1 of the parking relay valve through the parking air supply port 29, and at the same time accelerating the decompression time of the parking relay valve 130 by operating the driving anti-skid solenoid valve 160, thereby achieving rapid parking and improving the parking release time; cleverly using the gas of the parking air supply port 29 to increase the air intake of the first air inlet 1 of the parking relay valve without increasing the air tank; cleverly using the driving anti-skid solenoid valve 160 to connect the first air inlet 1 of the parking relay valve with the second air inlet 4 of the parking relay valve, and linking it with the state of the hand brake valve 120, thereby improving the decompression time of the second air inlet 4 of the parking relay valve, and meeting the parking decompression time index requirement with a small increase in cost.

[0059] The second embodiment of the utility model provides a commercial vehicle, such as Figure 3 As shown, the commercial vehicle 200 includes a parking brake control system 100 .

[0060] According to the commercial vehicle of the embodiment of the present utility model, the air circuit connection mode of the parking brake control system is simple and has fewer components. Without adding an air storage tank, the air intake of the parking relay valve is increased, the parking pressure reduction capacity is improved, the pressure reduction time is shortened, the vehicle cost and layout space are saved, and the layout and performance index requirements of complex configuration models are met.

[0061] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0062] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A parking brake control system, characterized in that: include: An air handling unit, the air handling unit comprising a dryer and a four-circuit protection valve, the input end of the dryer being connected to the compressor, and the output end of the dryer being connected to the air inlet of the four-circuit protection valve; A hand brake valve, wherein an air inlet of the hand brake valve is connected to a first air outlet of the four-circuit protection valve to actuate the hand brake valve to a parking state; A parking relay valve, wherein the air outlet of the parking relay valve is suitable for communicating with the brake air chamber of the wheel, the first air inlet of the parking relay valve is connected to the first air outlet of the four-circuit protection valve and the air inlet of the hand brake valve, the second air inlet of the parking relay valve is connected to the air outlet of the hand brake valve, the first air inlet of the parking relay valve is also connected to the parking air supply port of the air handling unit, and the parking air supply port is connected to the output end of the dryer; When the hand brake valve is in the parking state, the first air inlet of the parking relay valve is communicated with the air outlet of the parking relay valve.

2. The parking brake control system according to claim 1, characterized in that: A relief valve is provided on the pipeline between the first air inlet of the parking relay valve and the parking air supply port to stabilize the pressure.

3. The parking brake control system according to claim 2, characterized in that: A pressure limiting valve is also provided between the overflow valve and the first air inlet of the parking relay valve to limit the pressure.

4. The parking brake control system according to claim 1, characterized in that: The air handling unit further comprises: A first one-way valve, wherein a first end of the first one-way valve is connected to the output end of the dryer, and a second end of the first one-way valve is connected to the parking air supply port.

5. The parking brake control system according to any one of claims 1 to 4, characterized in that: The parking brake control system further includes: A driving anti-skid solenoid valve, wherein a first end of the driving anti-skid solenoid valve is connected to a first air inlet of the parking relay valve, a second end of the driving anti-skid solenoid valve is connected to a second air inlet of the parking relay valve, and a third end of the driving anti-skid solenoid valve is a first exhaust port; When the hand brake valve is in the parking state, the driving anti-skid solenoid valve is powered off, and the second end of the driving anti-skid solenoid valve is connected to the third end of the driving anti-skid solenoid valve; When the hand brake valve is in the driving state, the driving anti-skid solenoid valve is energized, and the first end of the driving anti-skid solenoid valve is communicated with the second end of the driving anti-skid solenoid valve.

6. The parking brake control system according to claim 5, characterized in that: The parking brake control system further includes: A control unit is connected to the hand brake valve and the driving anti-skid solenoid valve, and is used for controlling the on and off of the driving anti-skid solenoid valve according to the state of the hand brake valve.

7. The parking brake control system according to claim 5, characterized in that: The parking brake control system further includes: A second one-way valve, wherein a first end of the second one-way valve is connected to an air outlet of the hand brake valve, and a second end of the second one-way valve is connected to a second air inlet of the parking relay valve and a second end of the driving anti-skid solenoid valve.

8. The parking brake control system according to claim 5, characterized in that: The hand brake valve further includes a second exhaust port. When the hand brake valve is in a driving state, the air inlet of the hand brake valve is communicated with the second exhaust port.

9. The parking brake control system according to claim 8, characterized in that: The parking relay valve also includes a third exhaust port. When the hand brake valve is in the driving state, the first air inlet of the parking relay valve is disconnected from the air outlet of the parking relay valve, and the air outlet of the parking relay valve is connected to the third exhaust port.

10. A commercial vehicle, characterized in that: The invention comprises a parking brake control system as described in any one of claims 1 to 9.

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