Electromechanical brake system of multi-axle vehicle

Abstract

The invention provides an electronic mechanical braking system of a multi-axle vehicle, which comprises at least two axle control units which are in communication connection with a braking request mechanism for generating a braking request signal and are used for receiving the braking request signal and formulating a corresponding control instruction, and each axle control unit at least corresponds to one axle; the braking devices are arranged at the two ends of the axle and used for generating braking force according to the control instruction, and the axle control units are in communication connection with the braking devices at the two ends of the corresponding axle; and at least one of the shaft control units is in communication connection with the braking devices on at least two shafts through a main network. At least one axle control unit is arranged as a fat axle control unit, the purpose of controlling brake devices at the two ends of a plurality of axles at the same time is achieved, the number of the axle control units is reduced, the structure of an electronic mechanical brake system is simplified, and the brake devices at the two ends of each axle are in communication connection with each axle control unit; and communication redundancy of the electronic mechanical braking system is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle braking, in particular to an electronic mechanical braking system of a multi-axle vehicle. Background Art

[0002] The vehicle's electronic mechanical braking system (EMB) is an advanced automotive braking technology that combines electronic and mechanical technologies. Sensors sense parameters such as brake pedal force and vehicle speed, and transmit data to the electronic control unit (ECU). The ECU adjusts the braking force based on real-time information, and achieves rapid response and adjustment of braking force through electronic control of brake actuators such as brake discs, thereby achieving precise control of the vehicle's braking system.

[0003] When faced with a multi-axle vehicle with three axles, most of the time, an electronic mechanical braking system of the three-axle vehicle is constructed by configuring a control module on each axle, configuring an electronic braking device at each end of each axle, and establishing communication connections and electrical connections between the three control modules.

[0004] However, in the above-mentioned electronic mechanical braking system applied to multi-axle vehicles, when implementing the braking of the vehicle, the number of parts involved is relatively large, and the overall communication architecture of the electronic mechanical braking system is relatively complex. In addition, since the electronic braking devices at both ends of each axle are only connected to the corresponding control module, the communication redundancy problem of the electronic mechanical braking system is not considered. Once one of the control modules fails, the electronic braking device corresponding to the control module will not be able to receive the braking signal and will not be able to brake normally, which will affect the safety of vehicle operation. Summary of the invention

[0005] The purpose of the present invention is to overcome the problem of communication redundancy of the electronic mechanical braking system on a multi-axle vehicle that is not taken into account in the prior art. When one of the control modules fails, the corresponding electronic braking device cannot be controlled in time, and the driving safety of the multi-axle vehicle cannot be guaranteed. An electronic mechanical braking system for a multi-axle vehicle is provided, and at least one axle control unit is set as a fat axle control unit to achieve the purpose of simultaneously controlling the braking devices at both ends of multiple axles, so as to reduce the number of axle control units and simplify the architecture of the electronic mechanical braking system. The braking devices at both ends of each axle are communicatively connected with each axle control unit to achieve communication redundancy of the electronic mechanical braking system. Even if one of the axle control units fails, the braking device can be controlled by the remaining axle control units to ensure that the multi-axle vehicle can brake normally and ensure the driving safety of the multi-axle vehicle.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] Electromechanical braking system for multi-axle vehicles, comprising:

[0008] At least two axle control units are communicatively connected to the brake request mechanism that generates the brake request signal, and are used to receive the brake request signal and formulate corresponding control instructions, and each axle control unit corresponds to at least one axle;

[0009] The brake devices arranged at both ends of the axle are used to generate braking force according to the control command, and the axle control unit is in communication connection with the brake devices at both ends of the corresponding axle;

[0010] At least one of the axis control units is communicatively connected to the brake devices on at least two axes via the main network.

[0011] At least two axle control units are provided to cope with the braking control of the braking devices at both ends of multiple axles of a multi-axle vehicle, and at least one axle control unit is provided to simultaneously control the braking devices corresponding to two or more axles through a main network, so as to reduce the number of parts of the electronic mechanical braking system and simplify the architecture of the electronic mechanical braking system.

[0012] The braking devices at both ends of each axle are communicatively connected to each axle control unit to achieve communication redundancy. Even if the axle control unit corresponding to the same axle fails, it can still receive the braking control instructions normally and control the vehicle braking, thus ensuring the driving safety of multi-axle vehicles.

[0013] Furthermore, the axle control unit is communicatively connected with the brake devices at both ends of its corresponding axle through the main network, and the axle control unit is also communicatively connected with the brake devices at both ends of the remaining axles through the slave network.

[0014] The communication connection between the axle control unit and each brake device is realized in the form of a master network and a slave network. Under normal conditions, the brake device control can be realized in the form of the axle control unit of the corresponding axle according to the corresponding master network. Under abnormal conditions, the control instruction can be forwarded by relying on the corresponding slave network to realize the brake device control, which will not affect the normal communication of the electronic mechanical system of the multi-axle vehicle and can also realize the communication redundancy of the electronic mechanical system of the multi-axle vehicle. The corresponding axle can be the axle of the adjacent axle control unit, such as the first embodiment, or it can be a pre-designated axle, such as pre-designating the first axle and the second axle as the corresponding axle of the first axle control unit, and the third axle as the corresponding axle of the second axle control unit.

[0015] Furthermore, the multi-axle vehicle includes at least a first axle, a second axle, a third axle, a first axle control unit and a second axle control unit. The first axle control unit is connected to the braking devices at both ends of the first axle through a first main network, and is connected to the braking devices at both ends of the second axle and the braking devices at both ends of the third axle through a first slave network; the second axle control unit is connected to the braking devices at both ends of the second axle and the braking devices at both ends of the third axle through a second main network, and is connected to the braking devices at both ends of the first axle through a second slave network.

[0016] For three-axle vehicles, two axle control units are provided, which are respectively connected to each braking device through a first master network, a first slave network, a second master network and a second slave network, that is, different communication links are used to realize the communication connection between the axle control unit and each braking device, thereby ensuring the communication redundancy of the electronic mechanical braking system of the three-axle vehicle.

[0017] Furthermore, the multi-axle vehicle includes at least a first axle, a second axle, a third axle, a fourth axle, a first axle control unit and a second axle control unit. The first axle control unit is connected to the braking devices at both ends of the first axle and the braking devices at both ends of the second axle through a first main network, and is connected to the braking devices at both ends of the third axle and the braking devices at both ends of the fourth axle through a second slave network; the second axle control unit is connected to the braking devices at both ends of the third axle and the braking devices at both ends of the fourth axle through the first main network, and is connected to the braking devices at both ends of the first axle and the braking devices at both ends of the second axle through a second slave network.

[0018] For four-axle vehicles, two axle control units are also provided, which are also connected to each braking device through the first master network, the first slave network, the second master network and the second slave network, that is, different communication links are used to realize the communication connection between the axle control unit and each braking device, thereby ensuring the communication redundancy of the electronic mechanical braking system of the four-axle vehicle.

[0019] Furthermore, the brake request mechanism includes a brake pedal and a parking switch, the brake pedal is connected to each axis control unit through a pedal side master network and a pedal side slave network, and the parking switch is connected to each axis control unit through hard-line communication.

[0020] For the brake request mechanism, the redundancy of the brake request signal is achieved through the communication connection between the pedal side main network, the pedal side slave network and the hard line, further ensuring the driving safety of multi-axle vehicles.

[0021] Furthermore, a pedal hard wire is also provided on the brake pedal, and the brake pedal is connected to the brake devices at both ends of at least one axle through the pedal hard wire.

[0022] As redundancy for the main network and the slave network, the brake pedal is connected to the brake devices at both ends of at least one axle through a pedal hard line, thereby increasing the redundancy of the electronic mechanical brake system of the multi-axle vehicle.

[0023] Furthermore, a power module is provided in each axle control unit, and each power module is connected to the braking device and brake pedal on the corresponding axle to supply power to the braking device and the brake pedal. The power module distributes corresponding energy according to the number of power supply objects.

[0024] Furthermore, the multi-axle vehicle at least includes a multi-axle main vehicle and a trailer that are connected to each other, and the axle control units of the multi-axle main vehicle are connected to the braking devices at both ends of each axle on the multi-axle main vehicle through the corresponding main network or the corresponding slave network; the axle control units of the trailer are connected to the braking devices at both ends of each axle on the trailer through the corresponding main network or the corresponding slave network; the axle control units of the multi-axle main vehicle are provided with electrical interfaces, and the axle control units of the multi-axle main vehicle are communicatively connected with the axle control units of the trailer through the corresponding electrical interfaces.

[0025] Furthermore, the brake request mechanism of the multi-axle main vehicle is also connected to the axle control unit of the trailer and the brake devices at both ends of at least one axle.

[0026] Furthermore, the trailer is a multi-axle trailer, and the axle control unit of the multi-axle trailer is communicatively connected to the brake devices at both ends of its corresponding axles through the main network, and the axle control unit of the multi-axle trailer is also communicatively connected to the brake devices at both ends of the remaining axles through the slave network.

[0027] The electronic mechanical braking system of a multi-axle vehicle is also applicable to a multi-axle vehicle consisting of a multi-axle main vehicle and a trailer that are connected to each other. For the multi-axle main vehicle, the axle control unit can also be connected to the brake device at both ends of each axle to achieve communication redundancy in the multi-axle main vehicle. Due to the connection relationship between the multi-axle main vehicle and the trailer, it is necessary to establish communication between the axle control units of the multi-axle main vehicle and the trailer to achieve the transmission of brake signals.

[0028] The brake request mechanism of the multi-axle main vehicle is connected to the axle control unit of the trailer and the brake devices at both ends of at least one axle to form redundancy of the brake request signal.

[0029] When the trailer is also a multi-axle vehicle, two communication links, a master network and a slave network, may also be provided to achieve communication redundancy on the trailer.

[0030] The beneficial effects of the present invention are:

[0031] At least one axle control unit is set as a fat axle control unit to achieve the purpose of controlling the brake devices at both ends of multiple axles at the same time, so as to reduce the number of axle control units and simplify the architecture of the electronic mechanical brake system. The brake devices at both ends of each axle are connected to each axle control unit for communication, so as to achieve communication redundancy of the electronic mechanical brake system. Even if one of the axle control units fails, the brake device can be controlled by the remaining axle control units, so as to ensure that the multi-axle vehicle can brake normally and ensure the driving safety of the multi-axle vehicle.

[0032] For a multi-axle vehicle having a multi-axle main vehicle and a trailer in a tethered relationship, the control unit of the multi-axle main vehicle is connected to the control units of each axle of the trailer for communication to achieve the transmission of the brake signal, and the multi-axle main vehicle and the trailer are constituted as an electronic mechanical brake system of the multi-axle main vehicle as a whole, and for its electronic mechanical brake system, the axle control unit of the multi-axle main vehicle is connected to the brake device at both ends of each axle to achieve communication redundancy of the multi-axle main vehicle. Furthermore, a connection is provided between the brake request mechanism of the multi-axle main vehicle and the axle control unit of the trailer and the brake device at both ends of at least one axle to achieve redundancy of the brake request signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of an electronic mechanical braking system for a multi-axle vehicle shown in Embodiment 1 of the present invention;

[0034] Figure 2 is a schematic structural diagram of an electronic mechanical braking system for a three-axle vehicle shown in Embodiment 2 of the present invention;

[0035] Figure 3 is a structural schematic diagram of an electronic mechanical braking system for a four-axle vehicle shown in Embodiment 3 of the present invention;

[0036] Figure 4 It is a partial structural schematic diagram of an electronic mechanical braking system for a multi-axle trailer shown in Example 5 of the present invention.

[0037] Wherein: 1. Axis control unit, 1A. Axis control unit in Embodiment 1, 1B. Another axis control unit in Embodiment 1, 1a. Power supply module, 1a1. Power supply module of axis control unit 1A, 1a2. Power supply module of axis control unit 1B, 1b. Signal processing module, 1b1. Signal processing module of axis control unit 1A, 1b2. Signal processing module of axis control unit 1B, 11. First axis control unit, 12. Second axis control unit, 2. Braking device, 2a. Control unit, 2b. Braking motor, 2c. Caliper, 2d. Brake disc, 3. Braking request mechanism, 3a. Brake pedal, 3aa. Transmission Sensor, 3b, parking switch, 3c, trailer brake lever, 4, main network, 41, first main network, 42, second main network, 43, third main network, 5, slave network, 51, first slave network, 52, second slave network, 53, third slave network, 6, pedal side main network, 7, pedal side slave network, 8, pedal hard wire, 9, power cord, 10, hard wire, 11a, first axle, 11b, second axle, 11c, third axle, 11d, fourth axle, 11e, first axle of trailer, 11f, second axle of trailer, 11g, third axle of trailer, 121, trailer CAN network, 13, vehicle battery. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0039] Please refer to Figure 1 As a first embodiment of the present application, an electronic mechanical braking system for a multi-axle vehicle is provided, wherein the multi-axle vehicle includes three or more axles, and a wheel is provided at both ends of each axle, and each wheel is correspondingly configured with a corresponding braking device 2.

[0040] The electronic mechanical brake system in this embodiment has at least two axle control units 1, namely an axle control unit 1A and an axle control unit 1B, which are connected in communication with a brake request mechanism 3 that generates a brake request signal, and are used to receive the brake request signal and formulate corresponding control instructions. Each axle control unit 1 corresponds to at least one axle.

[0041] The brake devices 2 provided at both ends of the axle are used to generate braking force according to the control command, and the axle control unit 1 is in communication connection with the brake devices 2 at both ends of the corresponding axle;

[0042] At least one of the axis control units 1 is communicatively connected to the brake devices 2 on at least two axes via the main network 4 .

[0043] When setting the axle control unit 1, it can be set according to actual needs, with each axle control unit 1 corresponding to at least one axle as the setting basis, and the axle control unit 1 can be set according to the axle, and each axle can be set to an axle control unit 1, or the axle control unit 1 can be set as a fat axle control unit, and the fat axle control unit can correspond to two or more axles. If the axle control unit 1 is set as a fat axle control unit, the fat axle control unit can be set on any axle corresponding to it.

[0044] The brake request mechanism 3 includes a brake pedal 3a and a parking switch 3b. After the brake pedal 3a and the parking switch 3b are manually or automatically controlled, a brake request signal will be generated accordingly.

[0045] The brake pedal 3a is provided with two sensors 3aa, and the sensor 3aa senses the driver's operation of the brake pedal 3a, obtains information including the degree of pedal depression and speed, and converts it into an electrical signal to obtain a brake request signal.

[0046] The parking switch 3b can be a mechanical handbrake lever or an electronic handbrake button. When the parking switch 3b is activated, such as pulling up the handbrake lever or pressing the electronic handbrake button, the sensor 3aa or mechanical structure inside the parking switch 3b will detect the activation action and generate a corresponding brake request signal.

[0047] The brake pedal 3a and the parking switch 3b are both connected to the axle control unit 1 for communication. The axle control unit 1 is provided with a signal processing module 1b which can receive and process the brake request signal generated by the brake pedal 3a or the parking switch 3b and generate corresponding control instructions for controlling vehicle braking.

[0048] The signal processing module 1b in this embodiment includes a signal processing module 1b1 in the axis control unit 1A and a signal processing module 1b2 in the axis control unit 1B. The signal processing module 1a mentioned in this embodiment can be the signal processing module 1a1 or the signal processing module 1a2, or a combination of the two.

[0049] Each braking device 2 is provided with a control unit 2a, a brake motor 2b and a caliper 2c. The control unit can receive control instructions from the shaft control unit 1, thereby converting the corresponding braking demand torque into a driving current, so that the brake motor 2b rotates, and then drives the caliper 2c to move, engage with the brake disc 2d on the wheel hub, generate friction braking force, and slow down the vehicle.

[0050] Regarding the communication connection between the axle control unit 1 and the braking device 2, in order to ensure the communication redundancy of the electronic mechanical braking system, two communication links are arranged on each axle control unit 1, which are divided into a main network communication link and a slave network communication link. For the braking device 2 of the corresponding axle, the axle control unit 1 communicates through the main network, and for the remaining axles, they communicate through the slave network.

[0051] In the communication relationship, the main network 4 is used as the communication connection mode under normal conditions. When there is no failure, the main network 4 is used for communication. The slave network 5 is used as the backup communication connection mode. When the main network 4 fails, the slave network 5 is used for communication.

[0052] Similarly, the communication connection between the brake pedal 3a and the axis control unit 1 is also divided into two communication lines: the master network and the slave network. Specifically, the brake pedal 3a is connected to the pedal side master network 6 and the pedal side slave network 7 respectively. The parking switch 3b is connected to each axis control unit through a hard line 10.

[0053] Among them, in the communication relationship involved in the shaft control unit 1, the main network 4 is used as the communication connection method under normal conditions, and the main network 4 is used for communication when there is no fault. The slave network 5 is used as a backup communication connection method. When a node or the main network 1 fails in the electronic mechanical braking system such as the shaft control unit 1, the slave network 5 is used for communication.

[0054] The above-mentioned main network, slave network, pedal side main network 6 and pedal side slave network 7 all use CAN bus. The CAN network contains fault diagnosis signals. When a node connected to the network fails, the diagnostic signal will be identified, and other nodes connected to the same network can be set to receive the signal.

[0055] In order to further increase the redundancy of the electronic mechanical braking system, a pedal hard line 8 is also provided on the brake pedal 3a. The two sensors 3aa on the brake pedal 3a are respectively connected to the brake devices 2 at both ends of each axle through the pedal hard line 8 to transmit a single-sided half-word transmission protocol signal, namely a SENT signal, which can control the brake device 2 to perform braking.

[0056] In order to ensure the normal operation of the electronic mechanical brake system, a power module 1a is set in each axle control unit 1, and each power module 1a is connected to the brake device 2 and the brake pedal 3a on the corresponding axle to supply power to the brake device 2 and the brake pedal 3a.

[0057] The power module 1a is connected to the vehicle battery 13 via a power line 9, and is powered by the vehicle battery 13, thereby powering the setting device and the brake pedal 3a. The power module 1a distributes corresponding energy according to the number of power supply objects.

[0058] The power module 1a in this embodiment includes a power module 1a1 arranged in the axis control unit 1A and a power module 1a2 arranged in the axis control unit 1B. The power module 1a mentioned in this embodiment can be the power module 1a1 or the power module 1a2, or a combination of the two.

[0059] Since when the axle control unit 1 is a fat axle control unit, it is necessary to simultaneously supply power to the braking devices 2 corresponding to two or more axles. Therefore, the power module 1a of the axle control unit 1 corresponding to the braking devices 2 of more than two axles should have higher energy. When distributing power, it is necessary to consider the number of power supply objects of the axle control unit 1 and distribute the corresponding energy according to the specific number of power supply objects.

[0060] In this embodiment, the energy value of the power module 1a1 of the axis control unit 1B is approximately twice that of the power module 1a2 of the axis control unit 1A.

[0061] The brake pedal 3a is also powered by the power module 1a in the axis control unit 1. In order to achieve redundant power supply of the brake pedal 3a, the brake pedal 3a is also connected to each axis control unit 1 through a power line 9. When one of the axis control units 1 fails, it can also be powered by the remaining axis control units 1.

[0062] In this embodiment, the parking switch 3 b is directly powered by the vehicle battery 13 , and may also be powered by the power module 1 a of the axle control unit according to actual needs.

[0063] Please refer to Figure 2 As a second embodiment of the present application, an electronic mechanical brake system for a three-axle vehicle is provided, wherein the three-axle vehicle comprises a first axle 11a, a second axle 11b and a third axle 11c, and has a first axle control unit 11 and a second axle control unit 12 corresponding to the axles.

[0064] The first axle control unit 11 is connected to the brake devices 2 at both ends of the first axle 11a through the first main network 41, and is connected to the brake devices 2 at both ends of the second axle 11b and the brake devices 2 at both ends of the third axle 11c through the first slave network 51.

[0065] The second axle control unit 12 is connected to the brake devices 2 at both ends of the second axle 11b and the brake devices 2 at both ends of the third axle 11c through the second main network 42 , and is connected to the brake devices 2 at both ends of the first axle 11a through the second slave network 52 .

[0066] In this embodiment, the main network 4 is also used as the communication connection mode in a normal state, and when a fault occurs, the slave network 5 is used for communication.

[0067] Taking the example of a failure in the first main network 41 and all axis control units being in a normal state, after the signal of the brake pedal 3a is transmitted to the first axis control unit 11 and the second axis control unit 12 through the pedal-side main network 6, the second axis control unit 12 will transmit the control command to the brake device 2 at both ends of the second axle 11b and the brake device 2 at both ends of the third axle 11c through the second main network 42, and at the same time transmit it to the brake device 2 at both ends of the first axle 11a through the second slave network 52.

[0068] Please refer to Figure 3 As a third embodiment of the present application, an electronic mechanical brake system for a four-axle vehicle is provided. The four-axle vehicle includes a first axle 11a, a second axle 11b, a third axle 11c and a fourth axle 11d, and has a first axle control unit 11 and a second axle control unit 12 corresponding to the above axles. The first axle control unit 11 and the second axle control unit 12 are both fat axle control units, corresponding to the two axles respectively.

[0069] Specifically, the first axle control unit 11 corresponds to the first axle 11a and the second axle 11b, and the first axle control unit 11 can be arranged on the first axle 11a or the second axle 11b. The second axle control unit 12 corresponds to the third axle 11c and the fourth axle 11d, and the second axle control unit 12 can be arranged on the third axle 11c or the fourth axle 11d.

[0070] The first axle control unit 11 is connected to the brake devices 2 at both ends of the first axle 11a and the brake devices 2 at both ends of the second axle 11b through the first main network 41, and is connected to the brake devices 2 at both ends of the third axle 11c and the brake devices 2 at both ends of the fourth axle 11d through the second slave network 52.

[0071] The second axle control unit 12 is connected to the brake devices 2 at both ends of the third axle 11c and the brake devices 2 at both ends of the fourth axle 11d through the first main network 41, and is connected to the brake devices 2 at both ends of the first axle 11a and the brake devices 2 at both ends of the second axle 11b through the second slave network 52.

[0072] Similar to the three-axle electronic mechanical brake system, communication redundancy of the electronic mechanical brake system is also achieved by setting up a main network communication line and a slave network communication link. Under normal conditions, the main network 4 is used as the communication connection method, and when a fault occurs, the slave network 5 is used for communication.

[0073] When a fault occurs in the first main network 41 and all the axis control units 1 are in normal state, after the signal of the brake pedal 3a is transmitted to the first axis control unit 11 and the second axis control unit 12 through the pedal side main network 6, the second axis control unit 12 will transmit the control command to the brake device 2 at both ends of the third axle 11c and the brake device 2 at both ends of the fourth axle 11d through the second main network 42, and at the same time transmit it to the brake device 2 at both ends of the first axle 11a and the brake device 2 at both ends of the second axle 11b through the second slave network 52.

[0074] As a fourth embodiment of the present application, an electronic mechanical braking system for a multi-axle vehicle is provided, wherein the multi-axle vehicle includes a multi-axle main vehicle and a trailer that are connected to each other.

[0075] The multi-axle main vehicle has three or more axles, and corresponding braking devices are provided at both ends of each axle. The multi-axle main vehicle is provided with at least two axle control units. The axle control unit of the multi-axle main vehicle is communicatively connected with the braking devices at both ends of its corresponding axles through the main network, and the axle control unit of the multi-axle main vehicle is also communicatively connected with the braking devices at both ends of the remaining axles through the slave network.

[0076] The trailer has two or more axles, each axle is provided with corresponding brake devices 2 at both ends, and at least one axle control unit can be provided on the trailer, and the axle control unit of the trailer is communicatively connected with the brake devices 2 at both ends of the corresponding axles on the trailer.

[0077] However, since the main vehicle and trailer are connected to each other, the axle control unit of the main vehicle needs to formulate corresponding braking control instructions, and then forward the control instructions to the axle control unit on the trailer, which forwards the control instructions to the braking device 2 of the trailer to control the braking of the trailer.

[0078] Therefore, the axle control units of the multi-axle main vehicle are all provided with electrical interfaces, and the axle control units of the multi-axle main vehicle are all connected to communicate with the axle control units of the trailer through the corresponding electrical interfaces, using the trailer CAN network 121 to transmit the ISO11992 control signals of the multi-axle main vehicle and realize the forwarding of control instructions.

[0079] The brake request mechanism of the multi-axle main vehicle is also connected to the axle control unit of the trailer and the brake devices 2 at both ends of at least one axle.

[0080] The brake request mechanism of the multi-axle main vehicle also includes a trailer brake lever 3c and a brake pedal 3a, which is a brake request mechanism for trailer braking. The trailer brake lever 3c is connected to the axle control unit of the trailer through a hard wire 10 and is powered by the vehicle battery 13 of the multi-axle main vehicle through a power line 9.

[0081] The brake pedal 3a is connected to the brake device 2 at both ends of at least one axle of the trailer through a pedal hard line 8, and can transmit a SENT signal to control the brake device 2 to perform braking.

[0082] As the fifth embodiment of the present application, an electronic mechanical braking system for a multi-axle vehicle is provided, wherein the multi-axle vehicle comprises a multi-axle main vehicle and a multi-axle trailer which are connected to each other, and the multi-axle main vehicle is a three-axle vehicle, the multi-axle trailer is a three-axle vehicle, and both the multi-axle main vehicle and the multi-axle trailer are equipped with electronic mechanical braking systems.

[0083] The electromechanical brake system of the multi-axle main vehicle is the same as the electromechanical brake system shown in the second embodiment.

[0084] The multi-axle main vehicle includes a first axle of the main vehicle, a second axle of the main vehicle and a third axle of the main vehicle, and the multi-axle trailer includes a first axle 11e of the trailer, a second axle 11f of the trailer and a third axle 11g of the trailer.

[0085] The multi-axle main vehicle is provided with a main vehicle first axle control unit and a main vehicle second axle control unit corresponding to the above-mentioned axles. The main vehicle first axle control unit is connected to the brake devices 2 at both ends of the first axle of the main vehicle through the first main network, and is connected to the brake devices 2 at both ends of the second axle of the main vehicle and the brake devices 2 at both ends of the third axle of the main vehicle through the first slave network; the main vehicle second axle control unit is connected to the brake devices 2 at both ends of the second axle of the main vehicle and the brake devices 2 at both ends of the third axle of the main vehicle through the second main network 42, and is connected to the brake devices 2 at both ends of the first axle of the main vehicle through the second slave network 52.

[0086] At the same time, the electronic mechanical braking system of the multi-axle trailer adopts a structure similar to the electronic mechanical braking system shown in the second embodiment, and two axle control units 1 are also provided. The connection relationship of one axle control unit A of the multi-axle trailer is taken as an example. Figure 4 As shown, one of the axle control units A of the multi-axle trailer is simultaneously connected to the brake devices 2 at both ends of each axle of the multi-axle trailer through the third master network 43 and the third slave network 53 .

[0087] The axle control unit A is a fat axle control unit, which can be communicatively connected with a plurality of braking devices 2. The connection relationship of the remaining components of the multi-axle trailer is the same as the connection relationship between the multi-axle main vehicle and the trailer in the fourth embodiment.

[0088] Under normal conditions, one of the axle control units B on the multi-axle main vehicle transmits control instructions to the axle control unit A through the trailer CAN network 121 , and the axle control unit A then controls the brake device 2 on the trailer through the third main network 43 .

[0089] When the third master network 43 fails, the third slave network 53 assumes the communication requirements from the axis control unit B to the brake device 2 .

[0090] If the axle control unit A fails, the brake request of the SENT signal can be transmitted by the pedal hard line 8 to brake the multi-axle trailer.

[0091] If the trailer CAN network 121 fails, the trailer brake lever 3c and brake pedal 3a installed on the multi-axle main vehicle will transmit the brake request signal to the axle control unit A. After the signal is processed by the axle control unit A, the brake device 2 on the multi-axle trailer is controlled to generate braking force.

[0092] The above embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. An electromechanical braking system for a multi-axle vehicle, characterized in that: include: At least two axle control units are communicatively connected to the brake request mechanism that generates the brake request signal, and are used to receive the brake request signal and formulate corresponding control instructions, and each of the axle control units corresponds to at least one axle; The brake devices arranged at both ends of the axle are used to generate braking force according to the control command, and the axle control unit is in communication connection with the brake devices at both ends of the corresponding axle; At least one of the axis control units is communicatively connected to the brake devices on at least two axes via a main network.

2. The electromechanical braking system for a multi-axle vehicle according to claim 1, characterized in that: The axle control unit is communicatively connected with the brake devices at both ends of its corresponding axle through a main network, and the axle control unit is also communicatively connected with the brake devices at both ends of the remaining axles through a slave network.

3. The electronic mechanical braking system of a multi-axle vehicle according to claim 2, wherein the multi-axle vehicle comprises at least a first axle, a second axle, a third axle, a first axle control unit and a second axle control unit, wherein: The first axle control unit is connected to the brake devices at both ends of the first axle through the first master network, and is connected to the brake devices at both ends of the second axle and the brake devices at both ends of the third axle through the first slave network; The second axle control unit is connected to the brake devices at both ends of the second axle and the brake devices at both ends of the third axle through the second main network, and is connected to the brake devices at both ends of the first axle through the second slave network.

4. The electronic mechanical braking system of a multi-axle vehicle according to claim 2, wherein the multi-axle vehicle comprises at least a first axle, a second axle, a third axle, a fourth axle, a first axle control unit and a second axle control unit, wherein: The first axle control unit is connected to the brake devices at both ends of the first axle and the brake devices at both ends of the second axle through the first master network, and is connected to the brake devices at both ends of the third axle and the brake devices at both ends of the fourth axle through the second slave network; The second axle control unit is connected to the brake devices at both ends of the third axle and the brake devices at both ends of the fourth axle through the first main network, and is connected to the brake devices at both ends of the first axle and the brake devices at both ends of the second axle through the second slave network.

5. The electromechanical brake system for a multi-axle vehicle according to claim 2, characterized in that: The brake request mechanism includes a brake pedal and a parking switch. The brake pedal is connected to each axis control unit through a pedal-side master network and a pedal-side slave network. The parking switch is connected to each axis control unit through hard-line communication.

6. The electromechanical brake system for a multi-axle vehicle according to claim 5, characterized in that: The brake pedal is also provided with a pedal hard wire, and the brake pedal is connected to the brake devices at both ends of at least one axle through the pedal hard wire.

7. The electromechanical brake system for a multi-axle vehicle according to claim 5, characterized in that: A power module is provided in each axle control unit. Each power module is connected to the brake device and brake pedal on the corresponding axle to supply power to the brake device and brake pedal. The power module distributes corresponding energy according to the number of power supply objects.

8. The electronic mechanical braking system of a multi-axle vehicle according to claim 2, wherein the multi-axle vehicle comprises at least a multi-axle main vehicle and a trailer connected to each other, characterized in that: The axle control unit of the multi-axle main vehicle is communicatively connected to the braking devices at both ends of its corresponding axles through the main network, and the axle control unit of the multi-axle main vehicle is also communicatively connected to the braking devices at both ends of the remaining axles through the slave network; the axle control unit of the trailer is communicatively connected to the braking devices at both ends of the corresponding axles on the trailer; the axle control units of the multi-axle main vehicle are all provided with electrical interfaces, and the axle control units of the multi-axle main vehicle are communicatively connected to each axle control unit of the trailer through the corresponding electrical interfaces.

9. The electromechanical brake system for a multi-axle vehicle according to claim 8, characterized in that: The brake request mechanism of the multi-axle main vehicle is also connected to the axle control unit of the trailer and the brake devices at both ends of at least one axle.

10. The electromechanical brake system for a multi-axle vehicle according to claim 9, characterized in that: The trailer is a multi-axle trailer, and the axle control unit of the multi-axle trailer is communicatively connected to the brake devices at both ends of its corresponding axles through the main network. The axle control unit of the multi-axle trailer is also communicatively connected to the brake devices at both ends of the remaining axles through the slave network.

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