Hand brake unit, control method, electronic apparatus and electronic brake control system

Abstract

To provide a hand braking unit that has an independent trailer brake function, satisfies the requirement of a driver for deceleration or braking of the trailer in the driving process, and improves the driving experience of an intelligent commercial vehicle.SOLUTION: A hand brake unit includes: a first control valve 20 of a trailer, which has a first passage and a second passage that are selectively opened; an air supply pipeline P1 of a main vehicle which connects an air source and a brake air chamber 15 of the main vehicle; an exhaust pipeline P4 of the main vehicle which selectively conducts the air supply pipeline of the main vehicle to connect the brake air chamber of the main vehicle and an exhaust port; and a cooperative control pipeline of the trailer which is connected to the air supply pipeline and the exhaust pipeline of the main vehicle to connect the brake air chamber of the trailer via the first passage. The hand brake unit further includes a second control valve 30 of the trailer, and the brake air chamber of the trailer is connected to the exhaust port via the second passage and the second control valve of the trailer to form the exhaust pipeline of the trailer.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the field of braking technology, in particular to a handbrake unit, a control method, an electronic device and an electronic brake control system. [Background technology]

[0002] As the application of electronic intelligence becomes more and more widespread, the vehicle braking system is gradually upgraded to electronic signal control, and by incorporating other vehicle signals, it can achieve more accurate, flexible and safe brake control. EPH (Electro Pneumatic Hand Brake, hereinafter referred to as hand brake unit) is one of the most representative products, which is composed of an electronic control switch and a hand valve valve body, and the state of the valve body can be controlled by the electronic control switch and the ECU (Electronic Control Unit) signal, that is, the brake and release of the wheel end of the vehicle can be controlled by controlling the gas flow state in the valve body.

[0003] At present, the application of handbrake units is gradually expanding from the passenger car field to the commercial vehicle field. Unlike passenger cars, most commercial vehicles are equipped with trailers, which require the trailer to slow down or brake independently while the vehicle is moving. Conventional handbrake units control the simultaneous braking and simultaneous running of the main vehicle and trailer by pushing and pulling an electronic control switch or by the vehicle's ECU signal, but cannot realize independent braking control of the trailer.

[0004] It should be explained that the information disclosed in the above background art section is merely intended to enhance understanding of the background of the present invention and may therefore include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a handbrake unit, a control method, an electronic device and an electronic brake control system with independent braking function for the trailer, to meet the deceleration and braking needs of the trailer during driving, and to improve the driving experience of intelligent commercial vehicles.

[0006] One aspect of the present invention provides a hand brake unit including a trailer first control valve having a first passage and a second passage that are selectively opened, a main vehicle air supply pipeline connecting an air source and a main vehicle brake air chamber, a main vehicle exhaust pipeline selectively conducting the main vehicle air supply pipeline to connect the main vehicle brake air chamber and an exhaust port, and a trailer cooperative control pipeline communicating with the main vehicle air supply pipeline and the main vehicle exhaust pipeline to connect the trailer brake air chamber via the first passage, wherein the hand brake unit further includes a trailer second control valve installed in the trailer exhaust pipeline connecting the trailer brake air chamber to the second passage and the exhaust port via the trailer second control valve, and the hand brake unit has a trailer independent braking state, and in the trailer independent braking state, the main vehicle air supply pipeline and the trailer exhaust pipeline are conducted.

[0007] In some embodiments, the hand brake unit further includes a trailer third control valve installed in a trailer air supply pipeline connecting the air source to the trailer brake air chamber via the trailer third control valve and the second passage, and the hand brake unit further has a trailer brake release state, in which the trailer second control valve is blocked and the main vehicle air supply pipeline and the trailer air supply pipeline are conductive.

[0008] In some embodiments, the handbrake unit further includes a main vehicle and trailer simultaneous running state, in which the main vehicle's air supply pipeline and the trailer's cooperative control pipeline are conductive, a main vehicle and trailer simultaneous braking state, in which the main vehicle's exhaust pipeline and the trailer's cooperative control pipeline are conductive, and a trailer inspection state, in which the trailer's second control valve is blocked and the main vehicle's exhaust pipeline and the trailer's air supply pipeline are conductive.

[0009] In some embodiments, the handbrake unit further includes a relay valve having a control chamber and selectively open air intake passage and exhaust passage, wherein the main vehicle air intake pipeline is connected from the air source to the main vehicle brake air chamber via the air intake passage and the main vehicle exhaust pipeline is connected from the main vehicle brake air chamber to the exhaust port via the exhaust passage; a main vehicle air intake control pipeline connecting the air source to the control chamber and a main vehicle exhaust control pipeline connecting the control chamber to the exhaust port, wherein the main vehicle air intake pipeline is conductive when the main vehicle air intake control pipeline is conductive, and the main vehicle exhaust pipeline is conductive when the main vehicle exhaust control pipeline is conductive.

[0010] In some embodiments, the handbrake unit further includes a main vehicle first control valve having a selectively opening third passage and a fourth passage, and a main vehicle second control valve, wherein the main vehicle air supply control pipeline is connected from the air source to the control chamber via the third passage and the main vehicle second control valve, and the main vehicle exhaust control pipeline is connected from the control chamber to the exhaust port via the main vehicle second control valve and the fourth passage.

[0011] In some embodiments, the handbrake unit further includes a first air pressure sensor connected to a cooperative control pipeline of the trailer and / or a second air pressure sensor connected to a brake air chamber of the trailer.

[0012] In some embodiments, each control valve is integrated into a hand valve body and connected to an electronic control unit, the hand valve body also being connected to a main vehicle electronic control switch and a trailer electronic control switch.

[0013] According to another aspect of the present invention there is provided an electronic brake control system in which a handbrake unit as described in any of the above embodiments is installed.

[0014] According to another aspect of the present invention, there is provided a handbrake unit control method for controlling a handbrake unit as described in any of the embodiments described above, the control method including, in response to a trailer independent brake demand signal, opening the main vehicle air supply pipeline and opening the second passageway and a second control valve of the trailer, thereby opening the trailer exhaust pipeline.

[0015] In some embodiments, the handbrake unit further includes a trailer third control valve installed in a trailer air supply pipeline connecting the air source to the trailer brake air chamber via the trailer third control valve and the second passageway, and the control method further includes, in response to a trailer brake release demand signal, conducting the trailer air supply pipeline by conducting the main vehicle air supply pipeline, closing the trailer second control valve, and opening the second passageway and the trailer third control valve.

[0016] In some embodiments, the control method further includes, in response to a simultaneous running demand signal of the main vehicle and the trailer, conducting the main vehicle's air supply pipeline and opening the first passage to conduct the trailer's cooperative control pipeline; in response to a simultaneous brake demand signal of the main vehicle and the trailer, conducting the main vehicle's exhaust pipeline and opening the first passage to conduct the trailer's cooperative control pipeline; and in response to a trailer inspection demand signal, conducting the main vehicle's exhaust pipeline, closing the trailer's second control valve, and opening the trailer's third control valve and the second passage to conduct the trailer's air supply pipeline.

[0017] According to another aspect of the present invention, there is provided an electronic device for implementing the control method described in any one of the above embodiments.

[0018] The present invention has at least the following advantageous effects over the prior art:

[0019] The conventional handbrake unit realizes synchronous control of the trailer and the main vehicle through the trailer cooperative control pipeline. When the main vehicle's air supply pipeline and the trailer cooperative control pipeline are connected, the trailer and the main vehicle run simultaneously; when the main vehicle's exhaust pipeline and the trailer cooperative control pipeline are connected, the trailer and the main vehicle brake simultaneously; The handbrake unit of the present invention adds a second control valve to the trailer, and forms a trailer exhaust pipeline that connects the trailer brake air chamber to the exhaust port through the second passage of the first control valve of the trailer and the second control valve of the trailer; when the trailer cooperative control pipeline is cut off but the main vehicle's air supply pipeline and the trailer's exhaust pipeline are conductive, the main vehicle can run normally and the trailer can brake independently, thus realizing the independent braking function of the trailer, meeting the deceleration and braking needs of the trailer during driving, and improving the driving experience of intelligent commercial vehicles.

[0020] Whereas a conventional EPH can control the main vehicle and trailer simultaneously, the handbrake unit of the present invention increases the independent control of the trailer, thereby achieving more comprehensive and more accurate control of the running and braking of the main vehicle and trailer, thereby improving driving safety.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

[0022] The drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present invention, and together with the specification serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and other drawings can be obtained based on these drawings without creative efforts by those skilled in the art. [Brief description of the drawings]

[0023] [Figure 1] FIG. 2 is a principle schematic diagram of a handbrake unit in an embodiment of the present invention, showing the conducting pipeline in an independent braking state of the trailer; [Diagram 2] FIG. 2 is a principle schematic diagram of a handbrake unit in an embodiment of the present invention, showing the conductive pipeline when the trailer brake is released. [Diagram 3] FIG. 2 is a principle schematic diagram of a handbrake unit in an embodiment of the present invention, showing the conductive pipeline when the main vehicle and the trailer are traveling simultaneously. [Figure 4] FIG. 2 is a principle schematic diagram of a handbrake unit in an embodiment of the present invention, showing the conducting pipeline under simultaneous braking of the main vehicle and the trailer; [Diagram 5] FIG. 2 is a principle schematic diagram of a handbrake unit in an embodiment of the present invention, showing the conductive pipeline in a trailer inspection state; [Figure 6] FIG. 4 is a diagram showing steps of a control method in an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Exemplary embodiments will now be more fully described with reference to the drawings. However, exemplary embodiments may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided to fully and completely convey the concept of exemplary embodiments to those skilled in the art.

[0025] The drawings are merely schematic diagrams of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings indicate the same or similar parts, and therefore repeated description is omitted. Some of the block diagrams shown in the drawings are functional entities that do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software form, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0026] It should be noted that the flows shown in the drawings are merely illustrative and do not necessarily include all steps. For example, some steps may be decomposed, some steps may be combined or partially combined, and the actual execution order may change according to the actual situation. The terms "first", "second", "third" and similar used in the detailed description do not represent any order, number or importance, but are merely intended to distinguish different components.

[0027] It should be mentioned that, unless contradictory, the features of the embodiments of the invention and of the different embodiments can be combined with each other.

[0028] Referring to Figures 1 to 5, a handbrake unit according to an embodiment of the present invention comprises: a trailer first control valve 20 having a first passage 20a and a second passage 20b that are selectively opened; a main vehicle air supply pipeline P1 that connects an air source 11 and a main vehicle brake air chamber 15; a main vehicle exhaust pipeline P2 that selectively connects the main vehicle air supply pipeline P1 to the main vehicle brake air chamber 15 and an exhaust port 12; a trailer cooperative control pipeline P3 that communicates with the main vehicle air supply pipeline P1 and the main vehicle exhaust pipeline P2 and connects the trailer brake air chamber 16 via the first passage 20a; a trailer second control valve 30 installed in a trailer exhaust pipeline P4 connecting the trailer brake air chamber 16 to the second passage 20b and the exhaust port 12 via the trailer second control valve 30; The handbrake unit has a trailer independent braking state, in which the main vehicle's air intake pipeline P1 and the trailer's exhaust pipeline P4 are conductive.

[0029] The conventional handbrake unit realizes synchronous control of the trailer and the main vehicle through the trailer cooperative control pipeline P3. When the main vehicle's air supply pipeline P1 and the trailer's cooperative control pipeline P3 are connected, the trailer and the main vehicle run simultaneously, and when the main vehicle's exhaust pipeline P2 and the trailer's cooperative control pipeline P3 are connected, the trailer and the main vehicle brake simultaneously.

[0030] The handbrake unit of the present invention adds a trailer second control valve 30, and forms a trailer exhaust pipeline P4 that connects the trailer brake air chamber 16 to the second passage 20b of the trailer first control valve 20 and the exhaust port 12 via the trailer second control valve 30. When the trailer cooperative control pipeline P3 is cut off and the main vehicle's air supply pipeline P1 and the trailer exhaust pipeline P4 are conductive, the main vehicle will run normally and the trailer will brake independently, thus realizing the trailer's independent braking function, meeting the deceleration and braking needs of the trailer during driving, and improving the driving experience of intelligent commercial vehicles.

[0031] While a conventional EPH can control the main vehicle and the trailer simultaneously, the handbrake unit of the present invention increases the independent control over the trailer, thereby realizing more comprehensive and more accurate control over the running and braking of the main vehicle and the trailer, thereby improving driving safety.

[0032] In some embodiments, the handbrake unit comprises: The trailer further includes a third control valve 40 installed in a trailer air supply pipeline P5 connecting the trailer third control valve 40 from the air source 11 to the trailer brake air chamber 16 via a second passage 20b; The handbrake unit further has a trailer brake release state, in which the trailer second control valve 30 is shut off and the main vehicle air supply pipeline P1 and the trailer air supply pipeline P5 are conductive.

[0033] When the trailer brakes are released, the trailer releases its independent brakes and opens the trailing trailer's cooperative control pipeline P3, allowing the trailer to follow the main vehicle and run together.

[0034] In some embodiments, the handbrake unit comprises: The main vehicle and the trailer are traveling simultaneously, and when the main vehicle and the trailer are traveling simultaneously, the air supply pipeline P1 of the main vehicle and the cooperative control pipeline P3 of the trailer are connected to each other; The main vehicle and the trailer are in a simultaneous braking state, and in the simultaneous braking state of the main vehicle and the trailer, the exhaust pipeline P2 of the main vehicle and the cooperative control pipeline P3 of the trailer are in a conductive state; The trailer further includes an inspection state, in which the trailer second control valve 30 is shut off and the main vehicle exhaust pipeline P2 and the trailer intake pipeline P5 are connected.

[0035] In the trailer inspection state, the main vehicle maintains the brakes and the trailer releases the brakes to inspect the trailer.

[0036] The handbrake valve of the present invention can control the simultaneous running of the main vehicle and the trailer and the simultaneous braking of the main vehicle and the trailer, in addition to realizing trailer inspection control, it can further realize the braking function of an independent trailer, perform independent braking control of the trailer, and release the independent braking of the trailer when necessary, thereby optimizing the driving experience and improving driving safety.

[0037] In some embodiments, the handbrake unit comprises: A relay valve 50 having a control chamber and a selectively opened air supply passage 52 and exhaust passage 53, in which the main vehicle's air supply pipeline P1 is connected from the air source 11 to the main vehicle's brake air chamber 15 through the air supply passage 52, and the main vehicle's exhaust pipeline P2 is connected from the main vehicle's brake air chamber 15 to the exhaust port 12 through the exhaust passage 53; It further includes a main vehicle air intake control pipeline P6 connecting the air source 11 and the control chamber, and a main vehicle exhaust control pipeline P7 connecting the control chamber and the exhaust port 12, wherein the main vehicle air intake pipeline P1 is conductive when the main vehicle air intake control pipeline P6 is conductive, and the main vehicle exhaust pipeline P2 is conductive when the main vehicle exhaust control pipeline P7 is conductive.

[0038] Vent the control chamber of the relay valve 50 through the air intake control pipeline P6 of the main vehicle, open the air intake passage 52 of the relay valve 50, thereby making the air intake pipeline P1 of the main vehicle conductive, exhaust the gas in the control chamber of the relay valve 50 through the exhaust control pipeline P7 of the main vehicle, open the exhaust passage 53 of the relay valve 50, close the air intake passage 52, thereby making the exhaust pipeline P2 of the main vehicle conductive and blocking the air intake pipeline P1 of the main vehicle. In this way, it is realized to control the air intake pipeline P1 of the main vehicle and the exhaust pipeline P2 of the main vehicle.

[0039] In some embodiments, the handbrake unit further includes a main vehicle first control valve 60 having a selectively opening third passage 63 and a fourth passage 64, and a main vehicle second control valve 70, wherein the main vehicle air intake control pipeline P6 is connected from the air source 11 to the control chamber of the relay valve 50 via the third passage 63 and the main vehicle second control valve 70, and the main vehicle exhaust control pipeline P7 is connected from the control chamber of the relay valve 50 to the exhaust port 12 via the main vehicle second control valve 70 and the fourth passage 64.

[0040] The first control valve 60 of the main vehicle and the second control valve 70 of the main vehicle are used to control the continuity and cut-off of the main vehicle air supply control pipeline P6 and the main vehicle exhaust control pipeline P7, and further control the continuity and cut-off of the main vehicle air supply pipeline P1 and the main vehicle exhaust pipeline P2.

[0041] In addition, the control chamber of the relay valve 50 is also connected to the controlled air source 18, and the controlled air source 18 and the second control valve 70 of the main vehicle can connect the control chamber through a two-way check valve. The air source 11 can specifically be a gas tank, and the controlled air source 18 can specifically be, but is not limited to, a foot valve.

[0042] In some embodiments, the handbrake unit further includes a first air pressure sensor 82 connected to the trailer's cooperative control pipeline P3 and / or a second air pressure sensor 84 connected to the trailer's brake air chamber 16.

[0043] The first air pressure sensor 82 and the second air pressure sensor 84 enable monitoring of the air pressure in the trailer's cooperative control pipeline P3 and the air pressure in the trailer's brake air chamber 16, thereby allowing the control strategy to be adjusted based on the monitored air pressures.

[0044] In each of the above embodiments, the first control valve 60 of the main vehicle, the second control valve 70 of the main vehicle, the first control valve 20 of the trailer, the second control valve 30 of the trailer, and the third control valve 40 of the trailer may all be solenoid valves, and the air circuit can be easily and accurately controlled by controlling the power on / off. Specifically, the first control valve 60 of the main vehicle may be a double coil solenoid valve in which the third passage 63 is opened when the coil 60a is powered on, and the fourth passage 64 is opened when the coil 60b is powered on. The second control valve 70 of the main vehicle, the second control valve 30 of the trailer, and the third control valve 40 of the trailer can all open the internal air circuit when the power is on, and the first control valve 20 of the trailer can open the second passage 20b when the power is on, and open the first passage 20a when the power is off.

[0045] In the actual product, the control valves including the first control valve 60 of the main vehicle, the second control valve 70 of the main vehicle, the first control valve 20 of the trailer, the second control valve 30 of the trailer, and the third control valve 40 of the trailer, the relay valve 50, the first air pressure sensor 82, the second air pressure sensor 84 and other devices can all be integrated into the hand valve body, and the electronic control devices therein are all connected to the electronic control unit 80, so that the corresponding operations can be performed under the control of the ECU signal of the electronic control unit 80. The hand valve body is also connected to the electronic control switch of the main vehicle and the electronic control switch of the trailer, so that the electronic control switch of the main vehicle can operate the simultaneous running state of the main vehicle and the trailer, the simultaneous braking state of the main vehicle and the trailer, and the inspection state of the trailer, and the electronic control switch of the trailer can operate the independent braking state of the trailer and the brake release state of the hand brake unit, thereby realizing the flexible and accurate control of the commercial vehicle.

[0046] An embodiment of the present invention further provides an electronic brake control system (EBS) in which the handbrake unit described in any of the above-mentioned embodiments is installed. The electronic brake control system (EBS) is installed with the above-mentioned handbrake unit, and in addition to being able to control the simultaneous running of the main vehicle and the trailer and the simultaneous braking of the main vehicle and the trailer and to realize the trailer inspection control, can further realize the independent trailer braking function, and perform the trailer independent braking control to release the trailer independent braking when necessary, thereby optimizing the driving experience and improving the driving safety.

[0047] An embodiment of the present invention further provides a method for controlling a handbrake unit for controlling the handbrake unit described in any of the above-mentioned embodiments. FIG. 6 shows main steps of the method for controlling a handbrake unit, and as shown in relation to FIGS. 1 to 6, the method for controlling a handbrake unit includes the following steps: Step S610: in response to a trailer independent brake demand signal, open the main vehicle air supply pipeline P1 and open the trailer exhaust pipeline P4 by opening the second passage 20b and the trailer second control valve 30; Step S620: in response to a trailer brake release demand signal, open the main vehicle air supply pipeline P1, close the trailer second control valve 30, and open the second passage 20b and the trailer third control valve 40, thereby opening the trailer air supply pipeline P5; Step S630: in response to a simultaneous running demand signal of the main vehicle and the trailer, the main vehicle's air supply pipeline P1 is opened and the first passage 20a is opened, thereby opening the trailer's cooperative control pipeline P3; in response to a simultaneous main vehicle and trailer brake demand signal, open the main vehicle exhaust pipeline P2 and open the first passage 20a, thereby opening the trailer cooperative control pipeline P3 in a step S640; The method may include one or more steps of: in response to the trailer inspection demand signal, opening the main vehicle exhaust pipeline P2, closing the trailer second control valve 30, and opening the trailer third control valve 40 and the second passage 20b, thereby opening the trailer intake air pipeline P5, and step S650.

[0048] FIG. 6 only shows each executable step of the handbrake unit control method of the present invention, and each step may be realized independently or in combination, and the execution order between each step is not limited to that of FIG. 6, and the division, merging, reordering, and other synchronous or asynchronous execution methods of steps are all within the scope of protection of the present invention.

[0049] Here, each demand signal may be an ECU signal sent by the vehicle, or generated based on the operation of the main vehicle's electronic control switch / trailer's electronic control switch. The conduction / cutoff of each pipeline can be realized by controlling the power supply on / off of each control valve (solenoid valve).

[0050] The control method for the handbrake unit of the present invention can control the simultaneous running of the main vehicle and the trailer and the simultaneous braking of the main vehicle and the trailer, in addition to realizing trailer inspection control, it can further realize independent trailer braking control and release the independent trailer braking when necessary, thereby optimizing the driving experience and improving driving safety.

[0051] An embodiment of the present invention further provides electronic devices for implementing the control methods described in any of the above-mentioned embodiments to realize functions such as simultaneous driving control of the main vehicle and the trailer, simultaneous braking control of the main vehicle and the trailer, trailer inspection control, independent braking control of the trailer, and trailer brake release control, thereby optimizing the driving experience of commercial vehicles and improving driving safety.

[0052] The electronic device may be installed independently in the vehicle or may be integrated into the vehicle's controller such as an electronic control unit ECU. The electronic device may be expressed in several forms, including:

[0053] When expressed in the form of a functional (program) module architecture, it may include modules for realizing each step of the control method described above, for example, modules for realizing steps S610, S620, S630, S640, and S650.

[0054] When expressed in the form of a general-purpose computing device, it may include a processing unit and a memory unit storing executable instructions that, when executed by the processing unit, implement the control method described in any of the above embodiments.

[0055] Here, the storage unit may include a program / utility having one or more program modules, including but not limited to an operating system, one or more application programs, other program modules, and program data. The general-purpose computing device further includes a bus connecting the processing unit and the storage unit and other platform components, and the bus may include a local bus such as a storage unit bus, a peripheral bus, a graphical acceleration port, a processing unit bus, etc. The described general-purpose computing device can communicate with one or more external devices, other computing devices in the vehicle, a network (e.g., a local area network LAN, a wide area network WAN, and / or a public network such as the Internet), etc.

[0056] It is expressed in the form of a storage medium, a program is stored therein, and when the program is executed, the control method described in any of the above-mentioned embodiments is realized.

[0057] The storage medium may be any tangible medium that contains or stores the program, and in particular may employ any combination of one or more readable media, and the readable medium may be a readable signal medium or a readable storage medium. The described program may be used by or in combination with an instruction execution system, apparatus or device. The program may be executed entirely on the user's computing equipment, partially on the user's equipment, executed as an independent package, partially on the user's computing equipment and partially on a remote computing equipment, or entirely on a remote computing equipment or server. In the case of a remote computing equipment, the remote computing equipment may be connected to the user's computing equipment by any kind of network, including a local area network LAN or a wide area network WAN, or may be connected to an external computing equipment, for example, by the Internet using an Internet service provider.

[0058] The above content is to describe the present invention in more detail according to specific preferred embodiments, and the specific implementation of the present invention is not limited to these descriptions. For those with ordinary skill in the art to which the present invention belongs, some simple deductions or substitutions can be made without departing from the concept of the present invention, and all of them should be considered as belonging to the protection scope of the present invention.

Claims

1. A hand brake unit comprising: a trailer first control valve having a first passage and a second passage selectively opened; a main vehicle air supply pipeline connecting an air source and a brake air chamber of a main vehicle; a main vehicle exhaust pipeline selectively conducting the main vehicle air supply pipeline to connect the brake air chamber of the main vehicle and an exhaust port; and a trailer cooperative control pipeline communicating with the main vehicle air supply pipeline and the main vehicle exhaust pipeline to connect the trailer brake air chamber via the first passage, a trailer second control valve installed in an exhaust pipeline of the trailer connecting the trailer brake air chamber to the exhaust port via the second passage and the trailer second control valve; The hand brake unit is characterized in that the hand brake unit has a trailer independent braking state, and in the trailer independent braking state, the main vehicle air supply pipeline and the trailer exhaust pipeline are conductive.

2. a trailer third control valve installed in an air supply pipeline of the trailer connecting the air source to the trailer third control valve through the second passage and the trailer brake air chamber; 2. The hand brake unit according to claim 1, further comprising a trailer brake release state, wherein in the trailer brake release state, the trailer second control valve is shut off and the main vehicle air supply pipeline and the trailer air supply pipeline are in communication.

3. A state in which a main vehicle and a trailer are traveling simultaneously, and in the state in which the main vehicle and the trailer are traveling simultaneously, an air supply pipeline of the main vehicle and a cooperative control pipeline of the trailer are electrically connected; A simultaneous braking state of a main vehicle and a trailer, in which an exhaust pipeline of the main vehicle and a cooperative control pipeline of the trailer are conductive in the simultaneous braking state of the main vehicle and the trailer; 3. The handbrake unit of claim 2, further comprising a trailer inspection state, wherein in said trailer inspection state, said trailer second control valve is shut off and said main vehicle exhaust pipeline and said trailer intake air pipeline are in communication.

4. a relay valve having a control chamber and selectively open air supply passage and exhaust passage, wherein an air supply pipeline of the main vehicle is connected from the air source to the brake air chamber of the main vehicle through the air supply passage, and an exhaust pipeline of the main vehicle is connected from the brake air chamber of the main vehicle to the exhaust port through the exhaust passage; 4. The handbrake unit of claim 3, further comprising: a main vehicle air intake control pipeline connecting the air source and the control chamber; and a main vehicle exhaust control pipeline connecting the control chamber and the exhaust port, wherein the main vehicle air intake pipeline is conductive when the main vehicle air intake control pipeline is conductive, and the main vehicle exhaust pipeline is conductive when the main vehicle exhaust control pipeline is conductive.

5. 5. The handbrake unit as claimed in claim 4, further comprising a main vehicle first control valve having selectively open third and fourth passages and a main vehicle second control valve, wherein the main vehicle air intake control pipeline is connected from the air source to the control chamber via the third passage and the main vehicle second control valve, and the main vehicle exhaust control pipeline is connected from the control chamber to the exhaust port via the main vehicle second control valve and the fourth passage.

6. a first air pressure sensor connected to the trailer's cooperative control pipeline; and / or 2. The handbrake unit of claim 1, further comprising a second air pressure sensor connected to a brake air chamber of the trailer.

7. Each control valve is integrated into a hand valve body and connected to an electronic control unit; 7. A hand brake unit according to claim 1, wherein the hand valve body is also connected to an electronic control switch of a main vehicle and an electronic control switch of a trailer.

8. An electronic brake control system, characterized in that a handbrake unit according to any one of claims 1 to 7 is installed in the electronic brake control system.

9. A method for controlling a handbrake unit, used for controlling a handbrake unit according to any one of claims 1 to 7, said method comprising the steps of:

23. A method of controlling a handbrake unit comprising: in response to a trailer independent brake demand signal, opening the main vehicle air supply pipeline and opening the second passage and a trailer second control valve, thereby opening the trailer exhaust pipeline.

10. the handbrake unit further includes a trailer third control valve installed in a trailer air supply pipeline connecting the air source to the trailer third control valve via the second passage and the trailer brake air chamber; The control method includes:

10. The method of claim 9, further comprising, in response to a trailer brake release demand signal, conducting the main vehicle air supply pipeline, closing the trailer second control valve, and opening the second passage and the trailer third control valve, thereby conducting the trailer air supply pipeline.

11. in response to a simultaneous running demand signal of the main vehicle and the trailer, conducting the air supply pipeline of the main vehicle and opening the first passage, thereby conducting the cooperative control pipeline of the trailer; in response to a main vehicle and trailer simultaneous brake demand signal, energizing the main vehicle exhaust pipeline and opening the first passageway to energize the trailer cooperative control pipeline; 11. The method of claim 10, further comprising: in response to a trailer test demand signal, conducting an exhaust pipeline of the main vehicle, closing a second control valve of the trailer, and opening a third control valve of the trailer and the second passageway, thereby conducting an air supply pipeline of the trailer.

12. An electronic device, characterized in that the electronic device is used to realize the control method according to any one of claims 9 to 11.

Images