Electro-hydraulic brake system with ABS (anti-skid brake system) and driving anti-skid function and tractor

Abstract

The invention relates to an electro-hydraulic brake system with an ABS (anti-skid brake system) and a driving anti-skid function and a tractor, and the electro-hydraulic brake system comprises an electronic control unit, an electronic pedal, an energy storage unit, four electro-hydraulic brake valves, four speed sensors and four brake cylinders, the electronic pedal, the energy storage unit, the four electro-hydraulic brake valves, the four speed sensors and the four brake cylinders are respectively in communication connection with the electronic control unit; the four electro-hydraulic brake valves are respectively provided with an oil inlet, an oil outlet and an oil return port, and the oil outlet of each electro-hydraulic brake valve can be communicated with the oil inlet or the oil return port; the four oil inlets are respectively communicated with an oil supply pipeline through pipelines, and the four oil outlets are respectively communicated with inner cavities of the four brake cylinders through pipelines; the energy storage unit is communicated with the oil supply pipeline through a pipeline. The electric vehicle has the beneficial effects that the structure is simple, the design is reasonable, the ABS and driving anti-skid functions are achieved, meanwhile, electro-hydraulic braking can be achieved, the ramp automatic parking function can be achieved, the functions are diversified, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of tractor braking, in particular to an electro-hydraulic braking system with ABS and drive anti-skid functions and a tractor. Background Art

[0002] The bending and steering tractor is a kind of agricultural machinery equipment, which is mainly used for agricultural production such as tillage, sowing and harvesting. Its product structure mainly includes engine, chassis, wheels, bending and steering system and other parts. The working principle of the bending and steering tractor is mainly to realize the steering of the tractor through the bending and steering system. The system adopts a hydraulic power-assisting mechanism to realize the bending and steering of the wheels by controlling the movement of the hydraulic cylinder piston. During the bending process, the hydraulic cylinder piston rod contracts, causing the wheels to tilt inward to achieve bending; during the steering process, the hydraulic cylinder piston rod extends, causing the wheels to tilt outward to achieve steering. The advantage of the bending and steering tractor is that it can reduce the turning radius, making the tractor more flexible in a narrow working environment. In addition, its structural design and working principle make it easier to operate, while maintaining good stability during the steering process.

[0003] At present, the tractors with folding steering in the prior art have the following problems: 1. The tractors with folding steering currently do not have ABS and drive anti-skid functions; 2. Currently, braking can only be done by mechanical pedal braking, not electro-hydraulic braking; 3. The automatic parking function on a slope cannot be achieved. Summary of the invention

[0004] The invention provides an electro-hydraulic brake system with ABS and driving anti-skid function and a tractor, aiming to solve the problems in the prior art.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] An electro-hydraulic brake system with ABS and drive anti-skid function, comprising an electronic control unit, an electronic pedal, an energy storage unit, four electro-hydraulic brake valves, four speed sensors and four brake cylinders, wherein the electronic pedal, the energy storage unit, the four electro-hydraulic brake valves, the four speed sensors and the four brake cylinders are respectively connected to the electronic control unit for communication;

[0007] The four electro-hydraulic brake valves are respectively provided with an oil inlet, an oil outlet and an oil return port, and the oil outlet on each electro-hydraulic brake valve can be connected to the oil inlet or the oil return port; the four oil inlets are respectively connected to the oil supply pipeline through pipelines, and the four oil outlets are respectively connected to the inner cavities of the four brake cylinders through pipelines; the energy storage unit is connected to the oil supply pipeline through a pipeline.

[0008] The beneficial effects of the present invention are as follows: during operation, when the driver steps on the electronic pedal, the braking electrical signal is transmitted to the electronic control unit through the electronic pedal, and the electronic control unit converts the angle signal at this time into a current signal of the electro-hydraulic brake valve, thereby controlling the braking of the four tires; if the driver steps on the electronic pedal more heavily at this time, the current signal of the electro-hydraulic brake valve is relatively large, causing the speed signal detected by the speed sensor to be zero, the electronic control unit will control the corresponding tire electro-hydraulic brake valve to reduce the current signal, so that the tire speed is not zero, that is, the ABS function of the tractor can be realized;

[0009] When the speed sensor signal of one tire is found to be significantly greater than the other three speed sensor signals during normal driving, the electronic control unit will determine that one tire is slipping. At this time, the electronic control unit will control the opening of the electro-hydraulic brake valve to become larger, thereby increasing the braking force, thereby controlling the speed of the fast tire to drop to the same as the other three, thereby realizing the driving anti-skid function;

[0010] When the tractor is parked on a slope, when the speed sensor detects rotation speed, the electronic control unit will control the electro-hydraulic brake valves of the four tires to automatically brake, thereby realizing the automatic parking function on the slope.

[0011] The invention has a simple structure and a reasonable design, and has ABS and driving anti-skid functions, and can also perform electro-hydraulic braking, and can realize the automatic parking function on a slope, and has multiple functions and is easy to use.

[0012] Based on the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, the oil supply pipeline includes branch pipeline 1 and branch pipeline 2, wherein two of the oil inlets are connected to branch pipeline 1 through pipelines, and the remaining two oil inlets are connected to branch pipeline 2 through pipelines; the energy storage unit is connected to branch pipeline 1 and branch pipeline 2 through pipelines.

[0014] The beneficial effects of adopting the above further solution are simple structure and reasonable design. Branch pipeline 1 and branch pipeline 2 are used to supply oil to four electro-hydraulic brake valves respectively, which makes the oil supply convenient.

[0015] Furthermore, the energy storage unit includes two accumulators, one of which is connected to the first branch pipeline through a pipeline, and the other accumulator is connected to the second branch pipeline through a pipeline.

[0016] The beneficial effects of adopting the above further scheme are simple structure and reasonable design of the number of accumulators. When the hydraulic system loses power, one of the accumulators can still provide power for braking for the corresponding two electro-hydraulic brake valves, and when the hydraulic system loses power, the other accumulator can still provide power for braking for the remaining two electro-hydraulic brake valves.

[0017] Furthermore, it also includes a two-way filling valve communicatively connected to the electronic control unit, and the two-way filling valve is provided with interface one, interface two, interface three and interface four, the interface one can be connected with the interface two and the interface three is connected with the interface four, or the interface one can be connected with the interface three and the interface two is connected with the interface four; the interface two is connected with one end of the branch pipeline one, and the interface three is connected with one end of the branch pipeline two; the interface one is used for oil inlet, and the interface four is used for oil return.

[0018] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and using a two-way filling valve to fill the accumulator.

[0019] Furthermore, it also includes a pump that is communicatively connected to the electronic control unit, and the outlet of the pump is connected to the interface 1 through a pipeline.

[0020] The beneficial effects of adopting the above further solution are simple structure and reasonable design, and the oil is sent to the two-way filling valve and then to the accumulator by using a pump.

[0021] Furthermore, it also includes an oil supply tank, and the inlet of the pump is connected to the oil supply tank through a pipeline.

[0022] The beneficial effects of adopting the above further solution are simple structure, reasonable design, and convenient oil supply by using the oil supply tank to supply oil to the entire system.

[0023] Furthermore, it also includes a pressure switch that is communicatively connected to the electronic control unit, and the pressure switch is connected to the pipeline in the two-way filling valve through a pipeline.

[0024] The beneficial effects of adopting the above further scheme are simple structure, reasonable design, and using a pressure switch to monitor the pressure of the accumulator. When the pressure of the accumulator is lower than the set value, an alarm will be issued and the entire vehicle will be controlled to travel at a low speed until it stops.

[0025] Furthermore, it also includes a brake alarm connected to the electronic control unit for communication, and the brake alarm is connected to the pressure switch for communication.

[0026] The beneficial effects of adopting the above further scheme are simple structure and reasonable design. The pressure switch can be used to monitor the pressure of the accumulator to prevent the accumulator pressure from being too low. Once the pressure is lower than the system design value of 100 bar, the brake alarm will sound a brake alarm so that the operator can handle it in time.

[0027] Furthermore, it also includes an oil return tank, and the four oil return ports are connected to the oil return tank through pipelines respectively; or it also includes four oil return tanks, and the four oil return ports are connected to the four oil return tanks through pipelines respectively.

[0028] The beneficial effects of adopting the above further solution are simple structure and reasonable design, and one or more oil return tanks can be used to recover the oil in multiple electro-hydraulic brake valves, which makes the recovery convenient.

[0029] The invention also relates to a tractor comprising an electro-hydraulic brake system with ABS and drive anti-skid function as described above.

[0030] The beneficial effect of adopting the above further scheme is that the present invention also provides a tractor with a simple structure, reasonable design, ABS and drive anti-skid functions, electro-hydraulic braking, and automatic parking function on a slope, with diverse functions and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the dual-way liquid filling valve in the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the electro-hydraulic brake valve in the present invention.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 1. Electronic control unit; 2. Electronic pedal; 3. Electro-hydraulic brake valve; 4. Speed ​​sensor; 5. Branch line 1; 6. Branch line 2; 7. Accumulator; 8. Dual-way filling valve; 9. Pump; 10. Fuel supply tank; 11. Pressure switch; 12. Brake alarm; 13. Fuel return tank. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0040] Example 1

[0041] like Figures 1 to 3 As shown, this embodiment provides an electro-hydraulic brake system with ABS and driving anti-skid functions, including an electronic control unit 1, an electronic pedal 2, an energy storage unit, four electro-hydraulic brake valves 3, four speed sensors 4 and four brake cylinders, wherein the electronic pedal 2, the energy storage unit, the four electro-hydraulic brake valves 3, the four speed sensors 4 and the four brake cylinders are respectively connected to the electronic control unit 1 for communication;

[0042] The four electro-hydraulic brake valves 3 are respectively provided with an oil inlet, an oil outlet and an oil return port, and the oil outlet on each electro-hydraulic brake valve 3 can be connected with the oil inlet or the oil return port; the four oil inlets are respectively connected with the oil supply pipeline through pipelines, and the four oil outlets are respectively connected with the inner cavities of the four brake cylinders through pipelines; the energy storage unit is connected with the oil supply pipeline through a pipeline.

[0043] During operation, when the driver steps on the electronic pedal 2, the braking electrical signal is transmitted to the electronic control unit 1 through the electronic pedal 2. The electronic control unit 1 converts the angle signal into a current signal of the electro-hydraulic brake valve 3, thereby controlling the braking of the four tires. If the driver steps on the electronic pedal 2 more heavily at this time, the current signal of the electro-hydraulic brake valve 3 is relatively large, causing the speed signal detected by the speed sensor 4 to be zero, the electronic control unit 1 will control the corresponding tire electro-hydraulic brake valve 3 to reduce the current signal, so that the tire speed is not zero, that is, the ABS function of the tractor can be realized.

[0044] When it is found during normal driving that the signal of the speed sensor 4 of one tire is significantly greater than the signals of the other three speed sensors 4, the electronic control unit 1 will determine that one tire is slipping, and the electronic control unit 1 will control the opening of the electro-hydraulic brake valve 3 to become larger, so that the braking force becomes larger, thereby controlling the rotation speed of the fast tire to drop to the same as the other three, thereby realizing the driving anti-skid function;

[0045] When the tractor stops on a slope, when the speed sensor 4 detects a rotation speed, the electronic control unit 1 controls the electro-hydraulic brake valves 3 of the four tires to brake automatically, thereby realizing the automatic parking function on the slope.

[0046] Preferably, in this embodiment, the above-mentioned four electro-hydraulic brake valves 3 are respectively three-position three-way proportional valves, and the opening of the valve can be controlled by controlling the current of the solenoid valve. The larger the current, the larger the opening, and thus the greater the controlled brake pressure and the greater the braking force.

[0047] In addition, the electronic pedal 2 mentioned above can convert the angle into an electrical signal and send it to the electronic control unit 1 during the braking process.

[0048] The four speed sensors 4 are respectively used to provide the rotation speeds of the four wheels in real time.

[0049] Based on the above solution, the four brake cylinders are respectively installed on the chassis of the tractor near the four wheels, and are used to brake the four wheels respectively.

[0050] In addition, the above-mentioned electronic control unit 1 (equivalent to the controller in the prior art), electronic pedal 2, four electro-hydraulic brake valves 3 and four speed sensors 4 respectively adopt the prior art, and their specific structures and principles are not repeated here.

[0051] This embodiment has a simple structure and a reasonable design, and has ABS and driving anti-skid functions, and can also perform electro-hydraulic braking, and can realize the automatic parking function on a slope, and has multiple functions and is easy to use.

[0052] Example 2

[0053] On the basis of Example 1, in this embodiment, the oil supply pipeline includes branch pipeline 1 5 and branch pipeline 2 6, wherein two of the oil inlets are connected to branch pipeline 1 5 through pipelines, and the remaining two oil inlets are connected to branch pipeline 2 6 through pipelines; the energy storage unit is connected to branch pipeline 1 5 and branch pipeline 2 6 through pipelines.

[0054] The solution has a simple structure and a reasonable design. The branch line 1 5 and the branch line 2 6 are used to supply oil to the four electro-hydraulic brake valves 3, respectively, and the oil supply is convenient.

[0055] Example 3

[0056] On the basis of Example 2, in this example, the energy storage unit includes two accumulators 7, one of which is connected to the branch pipeline 1 5 through a pipeline, and the other accumulator 7 is connected to the branch pipeline 2 6 through a pipeline.

[0057] The scheme has a simple structure and the number of accumulators 7 is reasonably designed. When the hydraulic system loses power, one of the accumulators 7 can still provide power for braking the corresponding two electro-hydraulic brake valves 3, and when the hydraulic system loses power, the other accumulator 7 can still provide power for braking the remaining two electro-hydraulic brake valves 3.

[0058] The function of the accumulator 7 is to provide power for braking when the hydraulic system loses power.

[0059] It should be noted that the two accumulators 7 mentioned above respectively adopt the existing technology, and their specific structures and principles are not described in detail here.

[0060] Example 4

[0061] On the basis of any one of Examples 2 to 3, this embodiment also includes a two-way filling valve 8 communicatively connected to the electronic control unit 1, and the two-way filling valve 8 is provided with interface one, interface two, interface three and interface four, the interface one can be connected to the interface two and the interface three is connected to the interface four, or the interface one can be connected to the interface three and the interface two is connected to the interface four; the interface two is connected to one end of the branch pipeline one 5, and the interface three is connected to one end of the branch pipeline two 6; the interface one is used for oil inlet, and the interface four is used for oil return.

[0062] This solution has a simple structure and a reasonable design, and uses a dual-way filling valve 8 to fill the accumulator 7 with liquid.

[0063] It should be noted that the above-mentioned two-way filling valve 8 adopts the existing technology, and its specific structure and principle are not described in detail here.

[0064] Example 5

[0065] On the basis of Embodiment 4, this embodiment further comprises a pump 9 which is communicatively connected to the electronic control unit 1, and an outlet of the pump 9 is connected to the interface 1 through a pipeline.

[0066] This solution has a simple structure and a reasonable design. The oil is delivered to the dual-way filling valve 8 by a pump 9 and then to the accumulator 7 .

[0067] Example 6

[0068] On the basis of Embodiment 5, this embodiment further includes an oil supply tank 10, and the inlet of the pump 9 is connected to the oil supply tank 10 through a pipeline.

[0069] This solution has a simple structure and a reasonable design. The oil supply tank 10 is used to supply oil to the entire system, and the oil supply is convenient.

[0070] Example 7

[0071] On the basis of any one of Embodiments 4 to 6, this embodiment further includes a pressure switch 11 communicatively connected to the electronic control unit 1 , and the pressure switch 11 is connected to a pipeline in the two-way filling valve 8 through a pipeline.

[0072] The scheme has a simple structure and a reasonable design. The pressure switch 11 is used to monitor the pressure of the accumulator 7. When the pressure of the accumulator 7 is lower than the set value, an alarm is issued and the whole vehicle is controlled to travel at a low speed until it stops. The pressure of the accumulator 7 can be monitored to avoid excessive pressure of the accumulator 7.

[0073] Example 8

[0074] On the basis of Embodiment 7, this embodiment further includes a brake alarm 12 communicatively connected to the electronic control unit 1 , and the brake alarm 12 is communicatively connected to the pressure switch 11 .

[0075] The solution has a simple structure and a reasonable design. The pressure switch 11 can be used to monitor the pressure of the accumulator 7 to prevent the pressure of the accumulator 7 from being too low. Once the pressure is lower than the system design value of 100 bar, the brake alarm 12 will sound a brake alarm so that the operator can handle it in time.

[0076] Preferably, in this embodiment, the normal pressure of the accumulator 7 is in the range of 130-160 bar.

[0077] Example 9

[0078] On the basis of the above embodiments, this embodiment further includes an oil return tank 13, and the four oil return ports are connected to the oil return tank 13 through pipelines respectively; or further includes four oil return tanks 13, and the four oil return ports are connected to the four oil return tanks 13 through pipelines respectively.

[0079] This solution has a simple structure and a reasonable design. One or more oil return tanks 13 can be used to recover the oil in multiple electro-hydraulic brake valves 3, and the recovery is convenient.

[0080] Alternatively, the above-mentioned return oil tank 13 can also adopt other appropriate numbers, such as two return oil tanks 13. In this case, the four electro-hydraulic brake valves 3 are divided into two groups, and the two return oil tanks 13 respectively recover the oil in the two pairs of electro-hydraulic brake valves 3.

[0081] Example 10

[0082] On the basis of the above embodiments, this embodiment also provides a tractor, including the electro-hydraulic brake system with ABS and drive anti-skid function as described above.

[0083] The present embodiment also provides a folding steering tractor, which has a simple structure, a reasonable design, and is equipped with ABS and drive anti-skid functions. It can also be electro-hydraulic braked and can realize automatic parking function on a slope. It has various functions and is easy to use.

[0084] Based on the above scheme, the above tractor mainly refers to a bending steering tractor.

[0085] The working principle of the present invention is as follows:

[0086] During operation, when the driver steps on the electronic pedal 2, the braking electrical signal is transmitted to the electronic control unit 1 through the electronic pedal 2. The electronic control unit 1 converts the angle signal into a current signal of the electro-hydraulic brake valve 3, thereby controlling the braking of the four tires. If the driver steps on the electronic pedal 2 more heavily at this time, the current signal of the electro-hydraulic brake valve 3 is relatively large, causing the speed signal detected by the speed sensor 4 to be zero, the electronic control unit 1 will control the corresponding tire electro-hydraulic brake valve 3 to reduce the current signal, so that the tire speed is not zero, that is, the ABS function of the tractor can be realized.

[0087] When it is found during normal driving that the signal of the speed sensor 4 of one tire is significantly greater than the signals of the other three speed sensors 4, the electronic control unit 1 will determine that one tire is slipping, and the electronic control unit 1 will control the opening of the electro-hydraulic brake valve 3 to become larger, so that the braking force becomes larger, thereby controlling the rotation speed of the fast tire to drop to the same as the other three, thereby realizing the driving anti-skid function;

[0088] When the tractor stops on a slope, when the speed sensor 4 detects a rotation speed, the electronic control unit 1 controls the electro-hydraulic brake valves 3 of the four tires to brake automatically, thereby realizing the automatic parking function on the slope.

[0089] It should be noted that all electronic components involved in the present invention adopt the existing technology, and the above-mentioned components are electrically connected to the controller, and the control circuit between the controller and each component is the existing technology.

[0090] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0091] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Electro-hydraulic brake system with ABS and drive anti-skid function, Features: It comprises an electronic control unit (1), an electronic pedal (2), an energy storage unit, four electro-hydraulic brake valves (3), four speed sensors (4) and four brake cylinders, wherein the electronic pedal (2), the energy storage unit, the four electro-hydraulic brake valves (3), the four speed sensors (4) and the four brake cylinders are respectively connected to the electronic control unit (1) for communication; The four electro-hydraulic brake valves (3) are respectively provided with an oil inlet, an oil outlet and an oil return port, and the oil outlet on each electro-hydraulic brake valve (3) can be connected to the oil inlet or the oil return port; the four oil inlets are respectively connected to the oil supply pipeline through pipelines, and the four oil outlets are respectively connected to the inner cavities of the four brake cylinders through pipelines; the energy storage unit is connected to the oil supply pipeline through a pipeline.

2. The electro-hydraulic brake system with ABS and driving anti-skid function according to claim 1, Features: The oil supply pipeline comprises a branch pipeline one (5) and a branch pipeline two (6), wherein two of the oil inlets are connected to the branch pipeline one (5) through pipelines, and the remaining two oil inlets are connected to the branch pipeline two (6) through pipelines; the energy storage unit is connected to the branch pipeline one (5) and the branch pipeline two (6) through pipelines.

3. The electro-hydraulic brake system with ABS and driving anti-skid function according to claim 2, Features: The energy storage unit comprises two accumulators (7), one of the accumulators (7) being connected to the first branch pipeline (5) through a pipeline, and the other accumulator (7) being connected to the second branch pipeline (6) through a pipeline.

4. The electro-hydraulic brake system with ABS and driving anti-skid function according to claim 2, Features: It also includes a two-way filling valve (8) that is communicatively connected to the electronic control unit (1), and the two-way filling valve (8) is provided with an interface 1, an interface 2, an interface 3 and an interface 4, wherein the interface 1 can be communicated with the interface 2 and the interface 3 can be communicated with the interface 4, or the interface 1 can be communicated with the interface 3 and the interface 2 can be communicated with the interface 4; the interface 2 is communicated with one end of the branch line 1 (5), and the interface 3 is communicated with one end of the branch line 2 (6); the interface 1 is used for oil inlet, and the interface 4 is used for oil return.

5. The electro-hydraulic brake system with ABS and driving anti-skid function according to claim 4, Features: It also comprises a pump (9) which is communicatively connected to the electronic control unit (1), and the outlet of the pump (9) is connected to the interface 1 through a pipeline.

6. The electro-hydraulic brake system with ABS and driving anti-skid function according to claim 5, Features: It also comprises an oil supply tank (10), and the inlet of the pump (9) is connected to the oil supply tank (10) through a pipeline.

7. The electro-hydraulic brake system with ABS and driving anti-skid function according to claim 4, Features: It also includes a pressure switch (11) that is communicatively connected to the electronic control unit (1), and the pressure switch (11) is connected to the pipeline in the two-way filling valve (8) through a pipeline.

8. The electro-hydraulic brake system with ABS and driving anti-skid function according to claim 7, Features: It also includes a brake alarm (12) that is communicatively connected to the electronic control unit (1), and the brake alarm (12) is communicatively connected to the pressure switch (11).

9. The electro-hydraulic brake system with ABS and driving anti-skid function according to any one of claims 1 to 8, Features: It also includes an oil return tank (13), and the four oil return ports are respectively connected to the oil return tank (13) through pipelines; or it also includes four oil return tanks (13), and the four oil return ports are respectively connected to the four oil return tanks (13) through pipelines.

10. Tractor, Features: It comprises an electro-hydraulic brake system with ABS and drive anti-skid function as described in any one of claims 1 to 9.

Images