Brake-by-wire system and wide-body mining dump truck

Abstract

The utility model belongs to the technical field of vehicle braking, and particularly relates to a brake-by-wire system and a wide-body mining dump truck, which comprise an air supply unit, a multi-loop protection valve, a braking execution unit, a pair of front axle braking air chambers, a plurality of pairs of middle and rear axle braking air chambers, a front axle braking loop, a front axle air cylinder, a single-channel EBS valve and a middle and rear axle braking loop, comprising a middle-rear axle air cylinder, a multi-channel EBS valve, a service brake valve and an electromagnetic relay valve. According to the utility model, the electromagnetic relay valve is arranged, the air inlet is communicated with the middle and rear axle air reservoir, the first air outlet is communicated with the control port of the single-channel EBS valve, and the second air outlet is communicated with the control port of the multi-channel EBS valve, so that an air braking safety system and an electronic braking safety system are combined, and an automatic braking auxiliary function is realized; the braking system can actively brake when encountering sudden dangerous situations or the distance between the braking system and a front vehicle and pedestrians is smaller than the safe distance, and therefore the performance and safety of the braking system are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the vehicle braking technical field, concretely relates to a line control brake system and wide -body mining dump truck. BACKGROUND

[0002] At present, the brake system of heavy vehicle usually adopts pneumatic brake system, which is particularly suitable for the use scene and demand of heavy load vehicle, and the main reasons are as follows:

[0003] I. Large braking force: it can produce high air pressure intensity, so as to produce enough braking force, ensure that heavy load vehicle can slow down or stop quickly in emergency, and it is an important guarantee for safe driving;

[0004] II. Reaction sensitivity: it can produce huge braking force in a short time, solve the problem that the braking distance of heavy load vehicle is relatively long due to inertia, and improve the driving safety;

[0005] III. Simple structure and convenient maintenance: it helps to reduce manufacturing cost and maintenance cost, and reduce maintenance difficulty, and is suitable for long-distance driving and high-strength load working environment;

[0006] IV. Strong adaptability: it is suitable for various harsh environmental conditions, such as high temperature, high pressure and high humidity, and meets the demand of heavy load vehicle working in various complex environments;

[0007] V. High safety: its medium is compressed air, which will not burn, so it has high safety, and the fault is usually obvious, such as air pressure shortage or pipeline leakage, which is convenient for timely discovery and maintenance.

[0008] In the existing pneumatic brake system, the driver switches the working position of the service brake valve by stepping on the brake pedal, so that the compressed air flows to the service chamber of each brake chamber through the front axle brake circuit and the middle and rear axle brake circuit, thereby realizing manual brake.

[0009] However, the above-mentioned pneumatic brake system does not have automatic brake auxiliary function, and cannot actively brake when encountering sudden danger or the distance between the front vehicle and the pedestrian is less than the safety distance, and the driving safety is low. INVENTION CONTENTS

[0010] The utility model aims at providing a line control brake system and wide -body mining dump truck, which solves the problem that the prior art cannot actively brake when encountering sudden danger or the distance between the front vehicle and the pedestrian is less than the safety distance, and the technical problem of low driving safety.

[0011] In the first aspect, the utility model discloses a line control brake system, which comprises:

[0012] Gas supply unit;

[0013] A multi-circuit protection valve, with its air inlet connected to the air supply unit;

[0014] Braking actuator, including

[0015] A pair of front axle brake chambers,

[0016] Multiple pairs of brake chambers for the middle and rear axles;

[0017] Front axle braking circuit, including

[0018] The front axle air reservoir is connected to the first air outlet of the multi-circuit protection valve.

[0019] The single-channel EBS valve has an air inlet connected to the front axle air reservoir and two air outlets connected to the running chamber of one of the front axle brake chambers, respectively.

[0020] The braking circuit of the middle and rear axles includes

[0021] The middle and rear axle air tank is connected to the second air outlet of the multi-circuit protection valve.

[0022] The multi-channel EBS valve has an air inlet that is connected to the air reservoir of the middle and rear axles, and each air outlet is connected to the running chamber of one of the brake chambers of the middle and rear axles. Each air inlet corresponds to two air outlets, and the two air outlets are connected to the running chambers of the same pair of brake chambers of the middle and rear axles.

[0023] The service brake valve has a first air inlet connected to the front axle air reservoir, a second air inlet connected to the middle and rear axle air reservoirs, a first air outlet connected to the control port of the single-channel EBS valve, and a second air outlet connected to the control port of the multi-channel EBS valve.

[0024] The electromagnetic relay valve has an air inlet connected to the air storage tank of the middle and rear axles, a first air outlet connected to the control port of the single-channel EBS valve, and a second air outlet connected to the control port of the multi-channel EBS valve.

[0025] This application combines pneumatic braking and electronic braking safety systems by setting up an electromagnetic relay valve, connecting the air inlet to the middle and rear axle air tanks, connecting the first air outlet to the control port of a single-channel EBS valve, and connecting the second air outlet to the control port of a multi-channel EBS valve. This provides an automatic braking assist function, which can actively brake when encountering sudden dangerous situations or when the distance to the vehicle in front or pedestrians is less than a safe distance, thereby improving the performance and safety of the braking system.

[0026] Based on the above technical solution, the solution of this application can be further improved as follows:

[0027] Preferably, the front axle braking circuit further includes:

[0028] Two ABS valves are connected in series, one in each direction, between the running chamber of the front axle brake chamber and the outlet of the single-channel EBS valve. This design allows for precise control of the flow and pressure of compressed air, preventing wheel lock-up during braking and thus improving vehicle braking performance and driving safety.

[0029] Preferably, it further includes:

[0030] The first shuttle valve has a first air inlet connected to the first air outlet of the service brake valve via a pipeline, a second air inlet connected to the first air outlet of the electromagnetic relay valve via a pipeline, and an air outlet connected to the control port of the single-channel EBS valve via a pipeline.

[0031] The second shuttle valve has a first air inlet connected to the second air outlet of the service brake valve via a pipeline, a second air inlet connected to the second air outlet of the electromagnetic relay valve via a pipeline, and an air outlet connected to the control port of the multi-channel EBS valve via a pipeline. This design allows for the control of the compressed air pressure entering the control ports of the single-channel and multi-channel EBS valves by adjusting the valve opening, thereby enabling the braking system to provide appropriate braking force according to actual needs and ensuring braking stability and reliability.

[0032] Preferably, it further includes:

[0033] Parking brake circuit, including

[0034] The parking air reservoir is connected to the third air outlet of the multi-circuit protection valve.

[0035] The EPB control valve has an inlet connected to the parking air reservoir and a second outlet connected to the parking chambers of the pair of front axle brake chambers.

[0036] The pneumatic relay valve has an air inlet connected to the parking air reservoir and a control port connected to the first air outlet of the EPB control valve. Each air outlet is connected to the parking chamber of a pair of middle and rear axle brake chambers. With this solution, the pneumatic control of the parking brake can be performed via electronic commands, which improves the system's response speed and accuracy, reduces system complexity and maintenance costs, and provides a more intelligent and safer parking brake experience through collaborative work with other electronic systems.

[0037] Preferably, the parking brake circuit includes

[0038] The electromagnetic switch valve has its air inlet connected to the control port of the EPB control valve. This solution provides an automatic parking assist function, enabling the control system to actively apply the brakes. This is especially important in emergency avoidance or sudden malfunctions, and can greatly improve vehicle safety.

[0039] Preferably, it further includes:

[0040] Auxiliary braking circuit, including

[0041] An auxiliary air storage tank is connected to the fourth air outlet of the multi-circuit protection valve.

[0042] The pressure reducing valve has its inlet connected to the auxiliary air storage tank.

[0043] A multi-way control valve, the air inlet of which is connected to the air outlet of the pressure reducing valve.

[0044] Multiple on / off valves are provided, with their inlets connected to the outlets of the pressure reducing valves. This solution creates a highly integrated system, reducing system complexity and maintenance costs, and enabling independent control of different auxiliary braking components, allowing the system to adapt to different road conditions.

[0045] Preferably, the air supply unit includes an air compressor, a spiral heat dissipation pipe, a condenser, and a dryer connected in sequence. This solution achieves efficient and stable compressed air supply, effectively reduces the temperature of the compressed air, avoids deformation of subsequent components due to thermal expansion, and even prevents mechanical failures and leaks, thereby improving operational stability.

[0046] Preferably, the air supply unit further includes a condenser and a dryer connected in series between the spiral heat dissipation pipe and the multi-circuit protection valve; by adopting this solution, dry and pure compressed air can be obtained, protecting various components from corrosion and damage, extending the service life of the equipment, thereby ensuring the stability and reliability of the pneumatic system, and enabling the system to operate normally for a long time.

[0047] Preferably, the middle and rear axle brake chambers are provided in two pairs; this solution can stably provide drive and ensure driving smoothness.

[0048] Secondly, this utility model discloses a wide-body mining dump truck, including the brake-by-wire system described in any one of the above claims.

[0049] Through the above technical solution, this utility model achieves the following beneficial effects:

[0050] 1. This application combines pneumatic braking and electronic braking safety systems by setting up an electromagnetic relay valve, connecting the air inlet to the middle and rear axle air tank, connecting the first air outlet to the control port of a single-channel EBS valve, and connecting the second air outlet to the control port of a multi-channel EBS valve. This provides an automatic braking assist function, which can actively brake when encountering sudden dangerous situations or when the distance to the vehicle in front or pedestrians is less than a safe distance, thereby improving the performance and safety of the braking system.

[0051] 2. This application can precisely control the flow and pressure of compressed air by setting an ABS valve, thereby preventing the wheels from locking up during braking, thus improving the braking performance and driving safety of the vehicle;

[0052] 3. By setting up a first shuttle valve and a second shuttle valve, this application can control the pressure of compressed air entering the control ports of the single-channel EBS valve and the multi-channel EBS valve by adjusting the opening size of the valves, so that the braking system can provide appropriate braking force according to actual needs, and ensure the stability and reliability of braking. Attached Figure Description

[0053] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the brake-by-wire system according to a specific embodiment of the present invention;

[0055] Explanation of reference numerals in the attached figures:

[0056] 1. Air supply unit; 2. Multi-circuit protection valve; 3. Brake actuator unit; 4. Front axle brake circuit; 5. Middle and rear axle brake circuits; 6. Service brake valve; 7. Electromagnetic relay valve; 8. First shuttle valve; 9. Second shuttle valve; 10. Parking brake circuit; 11. Auxiliary brake circuit;

[0057] 101. Air compressor; 102. Spiral radiator; 103. Condenser; 104. Dryer; 301. Front axle brake chamber; 302. Middle and rear axle brake chambers; 401. Front axle air reservoir; 402. Single-channel EBS valve; 403. ABS valve; 501. Middle and rear axle air reservoirs; 502. Multi-channel EBS valve; 1001. Parking air reservoir; 1002. EPB control valve; 1003. Solenoid switch valve; 1004. Pneumatic relay valve; 1101. Auxiliary air reservoir; 1102. Pressure reducing valve; 1103. Multi-port control valve; 1104. On / off valve. Detailed Implementation

[0058] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0059] First, it should be noted that some directional terms used in the following description to clearly illustrate the technical solution of this utility model, such as the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," are all derived from the normal orientation of components in a brake-by-wire system and a wide-body mining dump truck. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features.

[0061] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0063] Example:

[0064] like Figure 1 As shown in the figure, this application discloses a brake-by-wire system for heavy vehicles. Its specific structure includes: an air supply unit 1, a multi-circuit protection valve 2, a brake execution unit 3, a front axle brake circuit 4, a middle and rear axle brake circuit 5, a service brake valve 6, and an electromagnetic relay valve 7.

[0065] Air supply unit 1 provides compressed air to the entire braking system and is the source of braking force.

[0066] The multi-circuit protection valve 2 ensures the safety of the braking system. When a circuit fails, it can isolate the circuit to prevent brake failure. Its air inlet is connected to the air supply unit 1 to provide compressed air for the subsequent braking circuit.

[0067] Braking actuator 3 includes:

[0068] A pair of front axle brake chambers 301 are used to generate braking force on the front axle wheels;

[0069] Multiple pairs of brake chambers 302 for the middle and rear axles are used to generate braking force on the wheels of the middle and rear axles.

[0070] Front axle braking circuit 4 includes:

[0071] The front axle air reservoir 401 is connected to the first air outlet of the multi-circuit protection valve 2 and is used to store compressed air.

[0072] The single-channel EBS valve 402 has an air inlet connected to the front axle air reservoir 401 and two air outlets connected to the driving chamber of a front axle brake chamber 301, which is used to control the driving braking force of the front axle brake chamber 301.

[0073] The middle and rear axle braking circuit 5 includes:

[0074] The middle and rear axle air storage tank 501 is connected to the second air outlet of the multi-circuit protection valve 2 and is used to store compressed air.

[0075] The multi-channel EBS valve 502 has its air inlets connected to the middle and rear axle air reservoirs 501, and each air outlet connected to the driving chamber of a middle and rear axle brake chamber 302, which is used to control the driving braking force of the middle and rear axle brake chambers 302.

[0076] Preferably, each air inlet of the multi-channel EBS valve 502 corresponds to two air outlets, which are connected to the running chamber of the same pair of rear axle brake chambers 302; this makes the air supply control between each pair of rear axle brake chambers 302 independent, so that when a branch circuit fails, the branch circuit can be isolated to prevent complete brake failure, thereby improving safety.

[0077] The first air inlet of the service brake valve 6 is connected to the front axle air reservoir 401, the second air inlet is connected to the middle and rear axle air reservoirs 501, the first air outlet is connected to the control port of the single-channel EBS valve 402, and the second air outlet is connected to the control port of the multi-channel EBS valve 502, which are used to control the closing and release of the service brake force.

[0078] The air inlet of the electromagnetic relay valve 7 is connected to the air reservoir 501 of the middle and rear axles, the first air outlet is connected to the control port of the single-channel EBS valve 402, and the second air outlet is connected to the control port of the multi-channel EBS valve 502. It serves as an auxiliary braking control valve and is used to control the start of the single-channel EBS valve 402 and the multi-channel EBS valve 502 after receiving an electrical signal.

[0079] It should be noted that, to more clearly explain how each component works, the appendix... Figure 1 In the diagram: a is the air inlet, a1 to a2 are the first to second air inlets; b is the air outlet, b1 to b6 are the first to sixth air outlets; c is the exhaust port; d is the control port.

[0080] The working principle of the above technical solution is as follows:

[0081] During operation, the air supply unit 1 supplies compressed air to the front axle braking circuit 4 through the first outlet of the multi-circuit protection valve 2, and supplies compressed air to the middle and rear axle air reservoirs 501 through the second outlet of the multi-circuit protection valve 2. They are isolated from each other to prevent brake failure.

[0082] When the driver presses the brake pedal, the brake pedal controls the switching position of the service brake valve 6. This connects the first air inlet to the first air outlet and the second air inlet to the second air outlet of the service brake valve 6. The manual braking process at this time is as follows:

[0083] In the front axle braking circuit 4, compressed air first enters the front axle air reservoir 401 through a pipeline, and then enters the inlet of the single-channel EBS valve 402 and the first inlet of the service brake valve 6 through pipelines respectively. Since the first inlet of the service brake valve 6 is connected to the first outlet, the compressed air will enter the control port of the single-channel EBS valve 402, thereby opening the valve of the single-channel EBS valve 402, so that the inlet of the single-channel EBS valve 402 is connected to the first outlet and the second outlet. Therefore, the compressed air can enter the service chambers of the two front axle brake chambers 301 respectively, and finally generate braking force on the front axle wheels.

[0084] In the middle and rear axle braking circuit 5, compressed air first enters the middle and rear axle air reservoir 501 through pipelines, and then enters the inlet of the multi-channel EBS valve 502 and the second inlet of the service brake valve 6 through pipelines respectively. Since the second inlet of the service brake valve 6 is connected to the second outlet, the compressed air will enter the control port of the multi-channel EBS valve 502, thereby opening the valve of the multi-channel EBS valve 502. This connects the inlet of the multi-channel EBS valve 502 with a pair of first and second outlets, and the inlet of the multi-channel EBS valve 502 with another pair of first and second outlets. Therefore, the compressed air can enter the service chambers of the two pairs of middle and rear axle brake chambers 302 respectively, ultimately generating braking force on the wheels of the middle and rear axles.

[0085] When a sudden dangerous situation occurs, or when upper-level sensing devices (such as radar, cameras, etc.) detect that the distance between the vehicle and the vehicle in front or a pedestrian is less than the safe distance, the control system sends an electrical signal to the electromagnetic relay valve 7, thereby causing the valve of the electromagnetic relay valve 7 to open, so that the air inlet of the electromagnetic relay valve 7 is connected to the first air outlet and the second air outlet. Then, compressed air enters the air inlet of the electromagnetic relay valve 7 from the middle and rear axle air reservoir 501 through the pipeline, and then flows through the electromagnetic relay valve 7 to the control port of the single-channel EBS valve 402 and the control port of the multi-channel EBS valve 502 respectively, thereby causing the valves of both to open, and the vehicle will perform emergency service braking.

[0086] This invention combines pneumatic braking and electronic braking safety systems by setting up an electromagnetic relay valve 7, connecting the air inlet to the middle and rear axle air reservoir 501, connecting the first air outlet to the control port of the single-channel EBS valve 402, and connecting the second air outlet to the control port of the multi-channel EBS valve 502. This provides an automatic braking assist function, enabling the system to actively brake when encountering sudden dangerous situations or when the distance to the vehicle in front or pedestrians is less than a safe distance, thereby improving the performance and safety of the braking system.

[0087] In some embodiments, such as Figure 1 As shown, the front axle braking circuit 4 also includes:

[0088] Two ABS valves 403 are connected in series, one in each direction, between the running chamber of the front axle brake chamber 301 and the outlet of the single-channel EBS valve 402.

[0089] By setting the ABS valve 403, the flow and pressure of compressed air can be precisely controlled, thereby preventing the wheels from locking up during braking and improving the vehicle's braking performance and driving safety.

[0090] In some embodiments, such as Figure 1 As shown, it also includes:

[0091] The first shuttle valve 8 has a first air inlet connected to the first air outlet of the service brake valve 6 via a pipeline, a second air inlet connected to the first air outlet of the electromagnetic relay valve 7 via a pipeline, and an air outlet connected to the control port of the single-channel EBS valve 402 via a pipeline.

[0092] The second shuttle valve 9 has its first air inlet connected to the second air outlet of the service brake valve 6 via a pipeline, its second air inlet connected to the second air outlet of the electromagnetic relay valve 7 via a pipeline, and its air outlet connected to the control port of the multi-channel EBS valve 502 via a pipeline.

[0093] With the above settings, the pressure of compressed air entering the control ports of the single-channel EBS valve 402 and the multi-channel EBS valve 502 can be controlled by adjusting the valve opening, thereby enabling the braking system to provide appropriate braking force according to actual needs and ensuring the stability and reliability of braking.

[0094] In some embodiments, such as Figure 1 As shown, it also includes: a parking brake circuit 10, which includes

[0095] The parking air reservoir 1001 is connected to the third air outlet of the multi-circuit protection valve 2 and is used to store compressed air.

[0096] EPB control valve 1002 has an air inlet connected to parking air reservoir 1001 and a second air outlet connected to the parking chamber of a pair of front axle brake chambers 301, used to control the closing and release of parking brake force.

[0097] The pneumatic relay valve 1004 has an air inlet connected to the parking air reservoir 1001 and a control port connected to the first air outlet of the EPB control valve 1002. Each air outlet is connected to the parking chamber of a pair of middle and rear axle brake chambers 302, and is used to control the parking braking force of the middle and rear axle brake chambers 302.

[0098] The working principle of the above technical solution is as follows:

[0099] During normal driving, the air inlet of the EPB control valve 1002 is connected to the first and second air outlets. Compressed air enters the parking air reservoir 1001 from the third outlet of the multi-circuit protection valve 2 through a pipeline, then enters the air inlet of the EPB control valve 1002. Inside the EPB control valve 1002, the air is split into two paths, which are respectively delivered to the first and second air outlets. One path enters the parking chamber of a pair of front axle brake chambers 301 through a pipeline from the second outlet of the EPB control valve 1002, while the other path enters from the first outlet of the EPB control valve 1002 through the second outlet. One air outlet is connected to the control port of the pneumatic relay valve 1004 via a pipeline, thereby connecting the air inlet of the pneumatic relay valve 1004 with multiple air outlets. Compressed air can then be input from the parking air reservoir 1001 through a pipeline to the air inlet of the pneumatic relay valve 1004, and then divided into multiple paths inside the pneumatic relay valve 1004 and sent to multiple air outlets respectively. Finally, each air outlet of the pneumatic relay valve 1004 is input through a pipeline to the parking chamber of a pair of middle and rear axle brake chambers 302. At this time, the front axle brake chamber 301 and the middle and rear axle brake chambers 302 will not generate parking braking force.

[0100] When the driver issues a parking command via the electronic parking brake switch, the ECU receives this signal and converts it into a corresponding electronic command, which is then sent to the EPB control valve 1002. This connects the exhaust port of the EPB control valve 1002 with the first and second exhaust ports. Consequently, the compressed air in the parking chambers of the pair of front axle brake chambers 301 flows back through the pipeline to the second exhaust port of the EPB control valve 1002 and is then discharged through the exhaust port of the EPB control valve 1002. At the same time, the control port of the pneumatic relay valve 1004 will no longer receive compressed air, connecting the exhaust port of the pneumatic relay valve 1004 with multiple intake ports. Therefore, the compressed air in the parking chambers of the multiple pairs of middle and rear axle brake chambers 302 flows back through the pipeline to the multiple exhaust ports of the pneumatic relay valve 1004 and is then discharged through the exhaust port of the pneumatic relay valve 1004. At this time, the front axle brake chambers 301 and the middle and rear axle brake chambers 302 will generate parking braking force.

[0101] With the above settings, the pneumatic control of the parking brake can be performed via electronic commands, which improves the system's response speed and accuracy, reduces the system's complexity and maintenance costs, and provides a more intelligent and safer parking brake experience through cooperation with other electronic systems.

[0102] Based on the above embodiments, the parking brake circuit 10 includes:

[0103] The electromagnetic switch valve 1003 has its air inlet connected to the control port of the EPB control valve 1002, and is used to control the release of the parking brake force in an emergency.

[0104] In an emergency, when the control system detects that the EPB control valve 1002 has not received an electronic command, it will send an electrical signal to the solenoid switch valve 1003 to switch the position of the solenoid switch valve 1003, thereby opening the control port of the EPB control valve 1002. Then the exhaust port of the EPB control valve 1002 will be connected to the first exhaust port and the second exhaust port.

[0105] With the above settings, an automatic parking assist function is provided, enabling the control system to actively apply the brakes. This is especially important in emergency avoidance or sudden malfunctions, and can greatly improve vehicle safety.

[0106] In some embodiments, such as Figure 1 As shown, it also includes an auxiliary braking circuit 11, which includes:

[0107] The auxiliary air storage tank 1101 is connected to the fourth air outlet of the multi-circuit protection valve 2 and is used to store compressed air.

[0108] The pressure reducing valve 1102 has an air inlet connected to the auxiliary air storage tank 1101, and is used to reduce the pressure of compressed air to meet usage requirements.

[0109] The multi-way control valve 1103 has an inlet connected to the outlet of the pressure reducing valve 1102. It is used to divide compressed air into multiple paths so that they can independently perform different functions, such as air horn, air lifting, and gear shifting.

[0110] Multiple on / off valves 1104, with their inlets connected to the outlets of pressure reducing valves 1102, are used for various functions, such as: exhaust / auxiliary butterfly valve, differential lock, and power take-off.

[0111] The above setup creates a highly integrated system, thereby reducing system complexity and maintenance costs, and enabling independent control of different auxiliary braking components, allowing the system to adapt to different road conditions.

[0112] In some embodiments, such as Figure 1 As shown, the air supply unit 1 includes an air compressor 101, a spiral heat dissipation pipe 102, a condenser 103, and a dryer 104 connected in sequence.

[0113] Specifically, the air compressor 101 is used to draw in outside air and compress it into high-pressure gas, and the spiral heat sink 102 is used to cool the high-temperature compressed air output from the spiral heat sink 102.

[0114] The above settings enable an efficient and stable compressed air supply, effectively reducing the temperature of the compressed air and preventing subsequent components from deforming due to thermal expansion, or even causing mechanical failures and leaks, thus improving operational stability.

[0115] Based on the above embodiments, such asFigure 1 As shown, the gas supply unit 1 also includes a condenser 103 and a dryer 104 connected in series between the spiral heat dissipation pipe 102 and the multi-circuit protection valve 2.

[0116] Specifically, the condenser 103 is used to reduce the water vapor content in the compressed air and prevent it from condensing into water in the subsequent pipeline, thereby affecting the dryness and purity of the compressed air. The dryer 104 is used to remove residual moisture, humidity and dust from the compressed air to ensure that the output compressed air is dry and pure.

[0117] By implementing the above settings, dry and clean compressed air can be obtained, protecting various components from corrosion and damage, extending the service life of the equipment, and thus ensuring the stability and reliability of the pneumatic system, enabling the system to operate normally for a long time.

[0118] In some embodiments, such as Figure 1 As shown, the middle and rear axle brake chambers 302 are configured in two pairs, namely one pair of middle axle brake chambers and one pair of rear axle brake chambers, which can stably provide drive and ensure driving smoothness; however, it is not limited to this, and can be configured in more ways depending on the specific vehicle model, without specific limitations.

[0119] This application also discloses a wide-body mining dump truck, including the above-mentioned brake-by-wire system.

[0120] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0121] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. 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 different embodiments or examples.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A brake-by-wire system, characterized in that, include: Gas supply unit; A multi-circuit protection valve, with its air inlet connected to the air supply unit; Braking actuator, including A pair of front axle brake chambers, Multiple pairs of brake chambers for the middle and rear axles; Front axle braking circuit, including The front axle air reservoir is connected to the first air outlet of the multi-circuit protection valve. The single-channel EBS valve has an air inlet connected to the front axle air reservoir and two air outlets connected to the running chamber of one of the front axle brake chambers, respectively. The braking circuit of the middle and rear axles includes The middle and rear axle air tank is connected to the second air outlet of the multi-circuit protection valve. The multi-channel EBS valve has an air inlet that is connected to the air reservoir of the middle and rear axles, and each air outlet is connected to the running chamber of one of the brake chambers of the middle and rear axles. Each air inlet corresponds to two air outlets, and the two air outlets are connected to the running chambers of the same pair of brake chambers of the middle and rear axles. The service brake valve has a first air inlet connected to the front axle air reservoir, a second air inlet connected to the middle and rear axle air reservoirs, a first air outlet connected to the control port of the single-channel EBS valve, and a second air outlet connected to the control port of the multi-channel EBS valve. The electromagnetic relay valve has an air inlet connected to the air storage tank of the middle and rear axles, a first air outlet connected to the control port of the single-channel EBS valve, and a second air outlet connected to the control port of the multi-channel EBS valve.

2. The brake-by-wire system according to claim 1, characterized in that, The front axle braking circuit also includes: Two ABS valves are connected in series, one in each direction, between the running chamber of the front axle brake chamber and the outlet of the single-channel EBS valve.

3. The brake-by-wire system according to claim 1, characterized in that, Also includes: The first shuttle valve has a first air inlet connected to the first air outlet of the service brake valve via a pipeline, a second air inlet connected to the first air outlet of the electromagnetic relay valve via a pipeline, and an air outlet connected to the control port of the single-channel EBS valve via a pipeline. The second shuttle valve has a first air inlet connected to the second air outlet of the service brake valve via a pipeline, a second air inlet connected to the second air outlet of the electromagnetic relay valve via a pipeline, and an air outlet connected to the control port of the multi-channel EBS valve via a pipeline.

4. The brake-by-wire system according to claim 1, characterized in that, Also includes: Parking brake circuit, including The parking air reservoir is connected to the third air outlet of the multi-circuit protection valve. The EPB control valve has an inlet connected to the parking air reservoir and a second outlet connected to the parking chambers of the pair of front axle brake chambers. The pneumatic relay valve has an air inlet connected to the parking air reservoir, a control port connected to the first air outlet of the EPB control valve, and each air outlet connected to the parking chamber of a pair of middle and rear axle brake chambers.

5. The brake-by-wire system according to claim 4, characterized in that, The parking brake circuit includes The electromagnetic switch valve has its air inlet connected to the control port of the EPB control valve.

6. The brake-by-wire system according to claim 1, characterized in that, Also includes: Auxiliary braking circuit, including An auxiliary air storage tank is connected to the fourth air outlet of the multi-circuit protection valve. The pressure reducing valve has its inlet connected to the auxiliary air storage tank. A multi-way control valve, the air inlet of which is connected to the air outlet of the pressure reducing valve. Multiple on / off valves are provided, with the air inlet connected to the air outlet of the pressure reducing valve.

7. The brake-by-wire system according to claim 1, characterized in that, The air supply unit includes an air compressor and a spiral heat dissipation pipe connected in sequence.

8. The brake-by-wire system according to claim 7, characterized in that, The gas supply unit also includes a condenser and a dryer connected in series between the spiral heat dissipation pipe and the multi-circuit protection valve.

9. The brake-by-wire system according to claim 1, characterized in that, The middle and rear axle brake chambers are provided in two pairs.

10. A wide-body mining dump truck, characterized in that, Includes the brake-by-wire system as described in any one of claims 1 to 9.

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