Electronic mechanical braking system for automobile and automobile

Abstract

The embodiment of the invention provides an electronic mechanical braking system for an automobile and the automobile. The automobile comprises a first wheel and a second wheel on different sides. The electronic mechanical braking system comprises permanent magnet synchronous motors corresponding to the first wheel and the second wheel in a one-to-one mode, and the permanent magnet synchronous motors are used for driving a braking device to brake the wheels. A hydraulic system can be partially or completely cancelled in a control system of an automobile, the permanent magnet synchronous motor directly acts on wheels to achieve braking, the safety of an electronic mechanical braking system is improved, and due to the fact that the response speed of electronic braking is higher than that of hydraulic braking, more accurate braking force control can be improved, and the safety of the braking function is improved.

Description

Technical Field

[0001] The present application relates to the automotive field, and in particular to an electronic mechanical braking system applied to an automobile and the automobile. Background Art

[0002] The electronic mechanical brake system has achieved a great simplification of the mechanical structure and optimization of the product volume by abandoning the hydraulic brake unit, oil tank and complex oil circuit layout, providing more flexible space for vehicle layout. The system completely relies on the electronic control unit to output the braking force, which significantly improves the response speed and control accuracy.

[0003] However, after the electronic mechanical braking system abandons the hydraulic brake unit, oil tank and complex oil circuit layout, how to achieve the safe braking energy of the vehicle and the safety of the braking function have become important issues that need urgent attention. Summary of the invention

[0004] The purpose of the present application is to solve the technical problem in the prior art of how to achieve automobile braking through electronic signals after eliminating the hydraulic brake unit, oil tank and complex oil circuit layout. Therefore, the present application provides an electronic mechanical braking system and a vehicle applied to a vehicle. By using a permanent magnet synchronous motor to control the braking of the wheels located on different sides of the vehicle, electronic mechanical braking can be effectively achieved, and the response speed of the electronic signal is faster, which can provide more precise braking control.

[0005] An embodiment of the present application provides an electronic mechanical braking system for a vehicle, wherein the vehicle includes a first wheel and a second wheel on different sides; the electronic mechanical braking system includes: a permanent magnet synchronous motor corresponding to the first wheel and the second wheel one by one, and the permanent magnet synchronous motor is used to drive a braking device to brake the wheels.

[0006] By adopting the above technical solution, the hydraulic system can be partially or completely eliminated in the control system of the automobile, and the permanent magnet synchronous motor can directly act on the wheels to achieve braking, thereby improving the safety of the electronic mechanical braking system. In addition, since the response speed of electronic braking is faster than that of hydraulic braking, more precise braking force control can be achieved, thereby improving the safety of the braking function.

[0007] In an optional implementation, it includes: a first drive circuit for driving a permanent magnet synchronous motor; The first drive circuit includes: a power supply module, a control module, a permanent magnet synchronous motor pre-drive module and a permanent magnet synchronous motor drive module; the power supply module is used to provide logic power supply and power supply for the control module, the permanent magnet synchronous motor pre-drive module, the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor; the control module outputs a control signal to the permanent magnet synchronous motor pre-drive module, so that the permanent magnet synchronous motor pre-drive module drives the permanent magnet synchronous motor drive module to convert the DC voltage of the power supply module into AC voltage according to the control signal, and then the permanent magnet synchronous motor drive module drives the permanent magnet synchronous motor to convert electrical energy into mechanical energy, so that the mechanical energy acts on the first wheel and / or the second wheel to achieve vehicle braking; Alternatively, a second drive circuit for simultaneously driving the permanent magnet synchronous motors corresponding to the first wheel and the second wheel; the second drive circuit comprises: a power supply module, a control module, two permanent magnet synchronous motor pre-drive modules and two permanent magnet synchronous motor drive modules; a control module controls the two permanent magnet synchronous motor pre-drive modules, each permanent magnet synchronous motor pre-drive module drives a permanent magnet synchronous motor drive module, and a permanent magnet synchronous motor drive module drives a permanent magnet synchronous motor.

[0008] By adopting the above technical solution, two permanent magnet synchronous motors can be driven by two first drive circuits or one second drive circuit. The two permanent magnet synchronous motors respectively drive the first wheel and the second wheel on different sides, thereby achieving electronic braking while saving the cost of the electronic mechanical braking system.

[0009] In an optional embodiment, the automobile further includes another set of third wheels and fourth wheels on different sides; the electronic mechanical braking system also includes: a permanent magnet synchronous motor driven by the first drive circuit or the second drive circuit and corresponding one-to-one to the third wheel and the fourth wheel.

[0010] By adopting the above technical solution, a first drive circuit can be set on each of the four wheels of the automobile to ensure the braking control of each wheel, or two second drive circuits can be used to drive the four wheels, which can save costs while realizing electronic braking. In addition, the first wheel and the second wheel, as well as the third wheel and the fourth wheel are located on different sides of the automobile, which can reduce the dangerous situation caused by the failure of the wheels on the same side of the vehicle, thereby improving the safety and robustness of the electronic mechanical braking system.

[0011] In an optional implementation, it further includes: a first redundant circuit, a first switch unit; the first redundant circuit includes: a power supply module, a control module, two permanent magnet synchronous motor pre-drive modules and two permanent magnet synchronous motor drive modules, one control module controls the two permanent magnet synchronous motor pre-drive modules, and each permanent magnet synchronous motor pre-drive module drives a permanent magnet synchronous motor drive module; The first redundant circuit is arranged in parallel with the first drive circuit, and is used to drive the corresponding permanent magnet synchronous motor when the first drive circuit fails; the first switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the corresponding permanent magnet synchronous motor and the first drive circuit after the first drive circuit fails, and connect the corresponding permanent magnet synchronous motor to the first redundant circuit; Alternatively, the first redundant circuit is arranged in parallel with the second drive circuit, and is used to drive the corresponding permanent magnet synchronous motor when the second drive circuit fails; the first switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the corresponding permanent magnet synchronous motor and the second drive circuit after the second drive circuit fails, and connect the corresponding permanent magnet synchronous motor to the first redundant circuit.

[0012] By adopting the above technical solution, a first redundant circuit is set in parallel with the first drive circuit or the second drive circuit. When the first drive circuit or the second drive circuit fails, the first redundant circuit takes over the corresponding permanent magnet synchronous motor to avoid wheel failure and improve safety and robustness.

[0013] In an optional implementation, it includes: providing a first redundant circuit on two first drive circuits corresponding to the first wheel and the second wheel, or the third wheel and the fourth wheel; Alternatively, a first redundant circuit is provided on a second driving circuit corresponding to the first wheel and the second wheel, or the third wheel and the fourth wheel; A first switch unit is provided between the permanent magnet synchronous motor corresponding to the first wheel or the third wheel and the permanent magnet synchronous motor drive module, and another first switch unit is provided between the permanent magnet synchronous motor corresponding to the second wheel or the fourth wheel and the permanent magnet synchronous motor drive module; After the first wheel or the third wheel fails, the first switch unit switches the permanent magnet synchronous motor corresponding to the first wheel or the third wheel to be connected to a permanent magnet synchronous motor drive module in the first redundant circuit, and / or, after the second wheel or the fourth wheel fails, the first switch unit switches the permanent magnet synchronous motor corresponding to the second wheel or the fourth wheel to be connected to another permanent magnet synchronous motor drive module in the first redundant circuit.

[0014] By adopting the above technical solution, the first drive circuit, the second drive circuit and the redundant circuit are switched through the first switch unit, which can effectively increase safety and robustness.

[0015] In an optional embodiment, it includes: a first electronic control unit including two first drive circuits, and a second electronic control unit including another two first drive circuits; Alternatively, a first electronic control unit including a second drive circuit, and a second electronic control unit including another second drive circuit; The first electronic control unit is used to drive two permanent magnet synchronous motors connected to the first wheel and the second wheel of the vehicle, and the second electronic control unit is used to drive two permanent magnet synchronous motors connected to the third wheel and the fourth wheel of the vehicle.

[0016] By adopting the above technical solution, a first electronic control unit and a second electronic control unit are set, the first electronic control unit drives the first wheel and the second wheel, and the second electronic control unit drives the third wheel and the fourth wheel. When the first electronic control unit or the second electronic control unit fails, the second electronic control unit or the first electronic control unit can be used to control the vehicle to enter a safe state, thereby improving safety and robustness.

[0017] In an optional implementation, it further includes: a second redundant circuit and a second switch unit; The second redundant circuit includes: a power supply module, a control module, a permanent magnet synchronous motor pre-drive module and a permanent magnet synchronous motor drive module; The second redundant circuit is arranged in the first electronic control unit, and / or is arranged in the second electronic control unit, and is arranged in parallel with the first drive circuit, and is used to drive the corresponding permanent magnet synchronous motor when the first drive circuit fails; the second switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the corresponding permanent magnet synchronous motor and the first drive circuit after the first drive circuit fails, and connect the permanent magnet synchronous motor to the second redundant circuit; Alternatively, the second redundant circuit is arranged in the first electronic control unit, and / or is arranged in the second electronic control unit and is arranged in parallel with the second drive circuit, and is used to drive the permanent magnet synchronous motor after a failure of the second drive circuit; the second switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the permanent magnet synchronous motor and the second drive circuit after a failure of the second drive circuit, and connect the permanent magnet synchronous motor to the second redundant circuit.

[0018] By adopting the above technical solution, a second redundant circuit is set in the first electronic control unit and / or the second electronic control unit. When the first drive circuit or the second drive circuit fails, the corresponding permanent magnet synchronous motor is taken over, thereby reducing the probability of vehicle failure and improving the safety and robustness of the electronic mechanical braking system.

[0019] In some optional implementations, the method includes: providing a second redundant circuit in each of the first electronic control unit and the second electronic control unit; A second switch unit is provided between the permanent magnet synchronous motor and the permanent magnet synchronous motor drive module corresponding to the first wheel or the second wheel, and another second switch unit is provided between the permanent magnet synchronous motor and the permanent magnet synchronous motor drive module corresponding to the third wheel or the fourth wheel; After the first wheel or the second wheel fails, the second switch unit switches the permanent magnet synchronous motor corresponding to the first wheel or the second wheel to be connected to the permanent magnet synchronous motor drive module in the second redundant circuit, and / or, after the third wheel or the fourth wheel fails, the second switch unit switches the permanent magnet synchronous motor corresponding to the third wheel or the fourth wheel to be connected to the permanent magnet synchronous motor drive module in the second redundant circuit.

[0020] In an optional implementation, the first switch unit and the second switch unit include: a single-pole double-throw switch.

[0021] By adopting the above technical solution and setting a second switch unit, the first drive circuit, the second drive circuit and the second redundant circuit can be switched, thereby increasing safety and robustness.

[0022] An embodiment of the present application also provides a car, comprising the above-mentioned electronic mechanical braking system for a car.

[0023] The embodiments of the present application provide an electronic mechanical braking system for an automobile and an automobile. The electronic mechanical braking system eliminates the traditional hydraulic brake unit, oil tank, and oil circuit, simplifies the mechanical structure, optimizes the product volume, and makes the overall vehicle layout more flexible. Because the braking force is output completely through electronic control, the response speed and control accuracy are improved, the safety and robustness are improved, and costs can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of an electronic mechanical braking system according to an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of a first drive circuit in an electronic mechanical brake system according to an embodiment of the present application; Figure 3 This is a schematic diagram of the structure of a second driving circuit in an electronic mechanical braking system according to an embodiment of the present application; Figure 4 This is a schematic diagram of the structure of a second driving circuit in another electronic mechanical braking system according to an embodiment of the present application; Figure 5 This is a schematic diagram of the structure of a first redundant circuit in an electronic mechanical braking system according to an embodiment of the present application; Figure 6 This is a structural schematic diagram of a first redundant circuit in another electronic mechanical braking system according to an embodiment of the present application; Figure 7This is a schematic diagram of the structure of a second redundant circuit in an electronic mechanical braking system according to an embodiment of the present application; Figure 8 A schematic diagram of the structure of a second redundant circuit in another electronic mechanical braking system according to an embodiment of the present application; Description of reference numerals: A: Operation module; B: control module; C: PMSM pre-driver module; D: PMSM drive module; E: Permanent magnet synchronous motor; F: first switch unit, second switch unit. DETAILED DESCRIPTION

[0025] The following specific embodiments illustrate the implementation of the present application, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application will be introduced in conjunction with some embodiments, this does not mean that the features of this application are limited to the implementation. On the contrary, the purpose of introducing the application in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide a deep understanding of the present application, the following description will include many specific details. The present application can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0026] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0027] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of this application, 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 this application can be understood according to specific circumstances.

[0029] In the description of the present application, it should be understood that in the present application, "electrical connection" can be understood as physical contact and electrical conduction between components; it can also be understood as a form in which different components in the circuit structure are connected through physical lines such as printed circuit board (PCB) copper foil or wires that can transmit electrical signals. "Coupled by..." can be understood as electrical conduction through air by indirect coupling. Indirect coupling can be understood as contactless coupling, in which, it can be understood by those skilled in the art that the coupling phenomenon refers to the phenomenon that there is close cooperation and mutual influence between the input and output of two or more circuit elements or electrical networks, and energy is transmitted from one side to the other through interaction. In order to make the purpose, technical solution and advantages of the present application clearer, the implementation method of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0030] Integrated-Electro-Hydraulic Brake System (I-EHB) is a brake system that integrates electronic, electromechanical and hydraulic control systems. Figure 1 As shown, the Electronic Control Unit (ECU) in the I-EHB is mainly composed of four parts, namely, a power supply module A, a control module B, a permanent magnet synchronous motor (PMSM) pre-drive module C and a PMSM drive module D. The ECU controls the permanent magnet synchronous motor E to generate torque, generates hydraulic pressure through a pressure building unit and acts on the wheel cylinder to achieve braking; in this application, the hydraulic system is cancelled and the permanent magnet synchronous motor can directly act on the wheel cylinder, and four permanent magnet synchronous motors are required to act on the four wheels respectively, so its control circuit also needs four copies, that is, the four control circuits respectively control the left front wheel (FLWheel), the right rear wheel (RR Wheel), the right front wheel (FR Wheel) and the left rear wheel (RL Wheel).

[0031] like Figure 1As shown, an embodiment of the application provides an electronic mechanical braking system for a car, wherein the car includes a first wheel and a second wheel on different sides; wherein the electronic mechanical braking system includes: a permanent magnet synchronous motor corresponding to the first wheel and the second wheel one by one, and the permanent magnet synchronous motor is used to drive a braking device to brake the wheels.

[0032] Among them, the first wheel and the second wheel are on different sides of the car, which means that the first wheel and the second wheel are respectively arranged on the left side or the right side of the car. In the embodiment of the present application, there is no limitation on the first wheel and the second wheel, which can be set according to specific circumstances. For example, if the first wheel is the left front wheel (FL Wheel), the second wheel can be set to the right rear wheel (RR Wheel) or the right front wheel (FR Wheel).

[0033] Specifically, the braking device is used to transmit the mechanical energy generated by the permanent magnet synchronous motor to the wheels for braking. Exemplarily, the braking device may include reduction gears, a gear set, etc.

[0034] Furthermore, the first wheel and the second wheel which are not on the same side are driven by the permanent magnet synchronous motor. Since the first wheel and the second wheel are arranged on different sides, when the vehicle needs to be braked, the vehicle can be safely braked.

[0035] For example, Figure 2 As shown, a permanent magnet synchronous motor may be provided at each of the left front wheel (FL Wheel) and the right rear wheel (RR Wheel) of the vehicle, or a permanent magnet synchronous motor may be provided at each of the right front wheel (FR Wheel) and the left rear wheel (RL Wheel) of the vehicle.

[0036] Optional, such as Figure 1 As shown, a permanent magnet synchronous motor can be provided on each of the left front wheel (FL Wheel), the right rear wheel (RR Wheel), the right front wheel (FR Wheel) and the left rear wheel (RL Wheel) of the vehicle, which can further ensure the safety of the system.

[0037] Based on the above scheme, those skilled in the art can conceive of situations such as driving multiple wheels by a permanent magnet synchronous motor, if the purpose is to control the wheels on different sides to achieve electronic braking and safety braking of the wheels, which is within the protection scope of this application.

[0038] In the embodiment of the present application, the hydraulic system can be partially or completely eliminated in the control system of the automobile, and the permanent magnet synchronous motor can directly act on the wheels to achieve braking, thereby improving the safety of the electronic mechanical braking system. In addition, since the response speed of electronic braking is faster than that of hydraulic braking, more precise braking force control can be achieved, thereby improving the safety of the braking function.

[0039] In some embodiments, Figure 2 As shown, the electronic mechanical braking system includes: a first drive circuit for driving a permanent magnet synchronous motor; wherein the first drive circuit includes: a power supply module A, a control module B, a permanent magnet synchronous motor pre-drive module C and a permanent magnet synchronous motor drive module D.

[0040] Among them, the power supply module is used to provide logic power supply and power supply for the control module, the permanent magnet synchronous motor pre-drive module, the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor; the control module outputs a control signal to the permanent magnet synchronous motor pre-drive module, so that the permanent magnet synchronous motor pre-drive module drives the permanent magnet synchronous motor drive module according to the control signal to convert the DC voltage of the power supply module into AC voltage, and then the permanent magnet synchronous motor drive module drives the permanent magnet synchronous motor to convert electrical energy into mechanical energy, so that the mechanical energy acts on the first wheel and / or the second wheel to achieve vehicle braking.

[0041] The power supply module, control module, PMSM pre-drive module, PMSM drive module and permanent magnet synchronous motor are described in detail below.

[0042] In actual situations, A provides the required logic power supply and power supply for B, C, D, and E; B senses the signal from the external sensor as input and outputs the control signal through internal logic operation; C drives D and thus indirectly drives E, assisting B in controlling E; D then drives E, converting A's DC voltage into AC voltage under logical control; E, as the execution object, converts electrical energy into mechanical energy; the working mode between each module is as follows: B outputs the control signal to C, C drives D to convert the DC voltage into AC voltage, and D drives E to realize the conversion of electrical energy into mechanical energy.

[0043] It is known that Figure 2 What is shown in the figure is a situation where two permanent magnet synchronous motors corresponding to the left front wheel and the right rear wheel are driven respectively by two first drive circuits. By analogy, a first drive circuit can be set on each of the four wheels of the car, which can improve the response speed and safety of the electronic mechanical braking system of the car.

[0044] exist Figure 1 and Figure 2 On the basis of the functional safety of electronic braking provided by the method, in order to further reduce the cost, the embodiment of the present application provides as follows Figure 3 The technical solution shown, Figure 3The electronic mechanical braking system includes: a second drive circuit for simultaneously driving the permanent magnet synchronous motors corresponding to the first wheel and the second wheel; wherein the second drive circuit includes: a power supply module, a control module, two permanent magnet synchronous motor pre-drive modules and two permanent magnet synchronous motor drive modules; a control module controls the two permanent magnet synchronous motor pre-drive modules, each permanent magnet synchronous motor pre-drive module drives a permanent magnet synchronous motor drive module, and a permanent magnet synchronous motor drive module drives a permanent magnet synchronous motor.

[0045] It can be seen that Figure 3 The solution shown reduces the number of A and B, which can effectively reduce costs and achieve electronic braking.

[0046] In an embodiment of the present application, two permanent magnet synchronous motors are driven by two first drive circuits or one second drive circuit. The two permanent magnet synchronous motors respectively drive the first wheel and the second wheel on different sides, which can save the cost of the electronic mechanical braking system while achieving electronic braking.

[0047] In some embodiments, the automobile further includes another set of third wheels and fourth wheels on different sides; the electronic mechanical braking system also includes: a permanent magnet synchronous motor driven by the first drive circuit or the second drive circuit and corresponding one-to-one to the third wheel and the fourth wheel.

[0048] Further, such as Figure 1 and Figure 4 As shown, a first drive circuit is provided on each of the four wheels of the automobile to ensure the braking control of each wheel, or two second drive circuits can be used to drive the four wheels, which can save costs while realizing electronic braking, and the first wheel and the second wheel, as well as the third wheel and the fourth wheel are located on different sides of the automobile, which can reduce the danger caused by the failure of the wheels on the same side of the vehicle and improve the safety and robustness of the electronic mechanical braking system.

[0049] Considering the actual use, from the perspective of functional safety, it is necessary to detect potential single-point failures and double-point failures and put the car into a safe state. Figure 1 and Figure 4 In the solution, when any single point failure of modules A, B, C, or D occurs, the wheels therein cannot be braked, but the remaining three wheels function normally and can enter a safe state. Figure 1 and Figure 4 If any two modules among A, B, C, and D fail at two points, if the wheels on the same side fail, danger will occur. If they fail on different sides, the system will enter a safe state.

[0050] It can be seen from Table 1 that for a single-point failure, the system can enter a safe state after the failure occurs; for a double-point failure, after the failure occurs, as long as the brakes on the same side do not fail, the remaining two brakes can still ensure a deceleration greater than 0.244g, and the system can enter a safe state. If a failure occurs on the same side, the brakes will be out of control and danger will occur.

[0051] It can be seen from Table 1 that for a single-point failure, the system can enter a safe state after the failure occurs; for a double-point failure, after the failure occurs, as long as the brakes on the same side do not fail, the remaining two brakes can still ensure a deceleration greater than 0.244g, and the system can enter a safe state. If a failure occurs on the same side, the brakes will be out of control and danger will occur.

[0052]

[0053] In the embodiments of the present application, in order to solve the situation of same-side failure in double-point failure, the following technical solution is proposed.

[0054] like Figure 5 As shown, the electronic mechanical braking system also includes: a first redundant circuit, a first switch unit (F); wherein the first redundant circuit includes: a power supply module, a control module, two permanent magnet synchronous motor pre-drive modules and two permanent magnet synchronous motor drive modules, a control module controls the two permanent magnet synchronous motor pre-drive modules, and each permanent magnet synchronous motor pre-drive module drives a permanent magnet synchronous motor drive module.

[0055] In some embodiments, Figure 5 As shown, the first redundant circuit is arranged in parallel with the first driving circuit, and is used to drive the corresponding permanent magnet synchronous motor when a failure occurs in the first driving circuit.

[0056] Specifically, the first switch unit is used to take over the corresponding permanent magnet synchronous motor when the first drive unit fails. The first switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the corresponding permanent magnet synchronous motor and the first drive circuit after the first drive circuit fails, and connect the corresponding permanent magnet synchronous motor to the first redundant circuit.

[0057] For example, Figure 5 As shown, a first redundant circuit is set on the two first drive circuits corresponding to the first wheel and the second wheel, or the third wheel and the fourth wheel; a first switch unit is set between the permanent magnet synchronous motor and the permanent magnet synchronous motor drive module corresponding to the first wheel or the third wheel, and another first switch unit is set between the permanent magnet synchronous motor and the permanent magnet synchronous motor drive module corresponding to the second wheel or the fourth wheel.

[0058] Specifically, after a failure of the first wheel or the third wheel, the first switch unit switches the permanent magnet synchronous motor corresponding to the first wheel or the third wheel to be connected to a permanent magnet synchronous motor drive module in the first redundant circuit, and / or, after a failure of the second wheel or the fourth wheel, the first switch unit switches the permanent magnet synchronous motor corresponding to the second wheel or the fourth wheel to be connected to another permanent magnet synchronous motor drive module in the first redundant circuit.

[0059] The first switch unit includes a single-pole double-throw switch, which can be implemented by a MOSFET combination.

[0060] In an embodiment of the present application, two first redundant circuits are arranged in parallel with the two first drive circuits. In the first drive circuit, the corresponding permanent magnet synchronous motor is taken over by the first redundant circuit to avoid wheel failure and improve safety and robustness; and the switching between the first drive circuit and the redundant circuit is achieved through the first switch unit, which can effectively increase safety and robustness.

[0061] Furthermore, if Figure 6 The first redundant circuit is arranged in parallel with the second drive circuit, and is used to drive the corresponding permanent magnet synchronous motor when the second drive circuit fails; the first switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the corresponding permanent magnet synchronous motor and the second drive circuit after the second drive circuit fails, and connect the corresponding permanent magnet synchronous motor to the first redundant circuit.

[0062] Exemplarily, a first redundant circuit is arranged on a second drive circuit corresponding to the first wheel and the second wheel, or the third wheel and the fourth wheel; a first switch unit is arranged between the permanent magnet synchronous motor corresponding to the first wheel or the third wheel and the permanent magnet synchronous motor drive module, and another first switch unit is arranged between the permanent magnet synchronous motor corresponding to the second wheel or the fourth wheel and the permanent magnet synchronous motor drive module; after the first wheel or the third wheel fails, the first switch unit switches the permanent magnet synchronous motor corresponding to the first wheel or the third wheel to be connected to one permanent magnet synchronous motor drive module in the first redundant circuit, and / or, after the second wheel or the fourth wheel fails, the first switch unit switches the permanent magnet synchronous motor corresponding to the second wheel or the fourth wheel to be connected to another permanent magnet synchronous motor drive module in the first redundant circuit.

[0063] In an embodiment of the present application, a first redundant circuit is arranged in parallel with the second drive circuit. When the second drive circuit fails, the first redundant circuit takes over the corresponding permanent magnet synchronous motor to avoid wheel failure and improve safety and robustness. In addition, the second drive circuit and the redundant circuit are switched through the first switch unit, which can effectively increase safety and robustness.

[0064] Will Figure 6 The scheme and Figure 1 and Figure 4 Compared with the scheme in , it can be seen from Table 2 that when a same-side failure occurs, the first redundant circuit uses the first switch unit to switch to achieve same-side failure backup, so Figure 6 The solution in can enter a safe state for both single-point failure and double-point implementation.

[0065] Through the above technical solution, electronic braking of the electronic mechanical braking system can be realized, the safety of the electronic mechanical braking system can be improved, and the cost can be saved on the basis of ensuring safety.

[0066] Furthermore, considering the possibility of ECU failure in the electromechanical brake system, such as Figure 7 and Figure 8 As shown, the electronic mechanical braking system in the embodiment of the present application includes: a first electronic control unit including two first drive circuits, a second electronic control unit including another two first drive circuits, or a first electronic control unit including one second drive circuit, a second electronic control unit including another second drive circuit, the first electronic control unit is used to drive two permanent magnet synchronous motors connected to the first wheel and the second wheel of the vehicle, and the second electronic control unit is used to drive two permanent magnet synchronous motors connected to the third wheel and the fourth wheel of the vehicle.

[0067] Specifically, by independently providing a first electronic control unit and a second electronic control unit, when the first electronic control unit or the second electronic control unit fails, the second electronic control unit or the first electronic control unit can be used to control the vehicle to enter a safe state, thereby improving the safety of the electronic mechanical braking system.

[0068] By adopting the above technical solution, a first electronic control unit and a second electronic control unit are set, the first electronic control unit drives the first wheel and the second wheel, and the second electronic control unit drives the third wheel and the fourth wheel. When the first electronic control unit or the second electronic control unit fails, the second electronic control unit or the first electronic control unit can be used to control the vehicle to enter a safe state, thereby improving safety and robustness.

[0069] In one embodiment, if Figure 7 As shown, the electronic mechanical braking system includes: a second redundant circuit and a second switch unit; the second redundant circuit includes: a power supply module, a control module, a permanent magnet synchronous motor pre-drive module and a permanent magnet synchronous motor drive module; the second redundant circuit is arranged in the first electronic control unit, and / or, is arranged in the second electronic control unit, and is arranged in parallel with the first drive circuit, and is used to drive the corresponding permanent magnet synchronous motor when the first drive circuit fails; the second switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the corresponding permanent magnet synchronous motor and the first drive circuit after the first drive circuit fails, and connect the permanent magnet synchronous motor to the second redundant circuit.

[0070] In another optional embodiment, if Figure 8 As shown, the electronic mechanical braking system also includes: a second redundant circuit is arranged in the first electronic control unit, and / or is arranged in the second electronic control unit, and is arranged in parallel with the second drive circuit, and is used to drive the permanent magnet synchronous motor after a failure of the second drive circuit; a second switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the permanent magnet synchronous motor and the second drive circuit after a failure of the second drive circuit, and connect the permanent magnet synchronous motor to the second redundant circuit.

[0071] In an embodiment of the present application, a second redundant circuit is provided in the first electronic control unit and / or the second electronic control unit. When a failure occurs in the first drive circuit or the second drive circuit, the corresponding permanent magnet synchronous motor is taken over, thereby reducing the probability of failure of the vehicle and improving the safety and robustness of the electronic mechanical braking system.

[0072] For example, Figure 7 and Figure 8 As shown, a second redundant circuit is respectively provided in the first electronic control unit and the second electronic control unit; a second switch unit is provided between the permanent magnet synchronous motor corresponding to the first wheel or the second wheel and the permanent magnet synchronous motor drive module, and another second switch unit is provided between the permanent magnet synchronous motor corresponding to the third wheel or the fourth wheel and the permanent magnet synchronous motor drive module; after a failure of the first wheel or the second wheel occurs, the second switch unit switches the permanent magnet synchronous motor corresponding to the first wheel or the second wheel to be connected to the permanent magnet synchronous motor drive module in the second redundant circuit, and / or, after a failure of the third wheel or the fourth wheel occurs, the second switch unit switches the permanent magnet synchronous motor corresponding to the third wheel or the fourth wheel to be connected to the permanent magnet synchronous motor drive module in the second redundant circuit.

[0073] Specifically, the second switch unit includes a single-pole double-throw switch, which is implemented by a MOSFET combination. By setting the second switch unit, the first drive circuit, the second drive circuit and the second redundant circuit are switched to increase safety and robustness.

[0074] An embodiment of the present application also provides a car, comprising the above-mentioned electronic mechanical braking system for a car.

[0075] The embodiments of the present application provide an electronic mechanical braking system and an automobile applied to an automobile, which eliminates the hydraulic brake unit, oil tank, and oil circuit, simplifies the mechanical structure, optimizes the product volume, and makes the overall vehicle layout more flexible. Since the braking force is output completely through electronic control, the response speed and control accuracy are improved; through safety analysis, the electronic mechanical braking system can enter a safe state for both single-point failure and double-point failure, making the ECU safer and more reliable; the response speed of the electronic mechanical braking system is improved, the control accuracy is improved, the safety and robustness are improved, and costs can be saved.

[0076] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and modifications of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and modifications.

Claims

1. An electromechanical braking system for a vehicle, characterized in that: The automobile comprises a first wheel and a second wheel on different sides; The electronic mechanical braking system includes: a permanent magnet synchronous motor corresponding to the first wheel and the second wheel one by one, and the permanent magnet synchronous motor is used to drive a braking device to brake the wheels.

2. The electromechanical braking system for a vehicle as claimed in claim 1, characterized in that: include: A first drive circuit for driving the permanent magnet synchronous motor; The first drive circuit comprises: a power supply module, a control module, a permanent magnet synchronous motor pre-drive module and a permanent magnet synchronous motor drive module; The power supply module is used to provide logic power supply and power supply for the control module, the permanent magnet synchronous motor pre-drive module, the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor; The control module outputs a control signal to the permanent magnet synchronous motor pre-driving module, so that the permanent magnet synchronous motor pre-driving module drives the permanent magnet synchronous motor driving module to convert the DC voltage of the power supply module into AC voltage according to the control signal, and then the permanent magnet synchronous motor driving module drives the permanent magnet synchronous motor to convert electrical energy into mechanical energy, so that the mechanical energy acts on the first wheel and / or the second wheel to achieve vehicle braking; or, a second driving circuit for simultaneously driving the permanent magnet synchronous motors corresponding to the first wheel and the second wheel; The second drive circuit comprises: one power supply module, one control module, two permanent magnet synchronous motor pre-drive modules and two permanent magnet synchronous motor drive modules; One control module controls two permanent magnet synchronous motor pre-drive modules, each permanent magnet synchronous motor pre-drive module drives one permanent magnet synchronous motor drive module, and one permanent magnet synchronous motor drive module drives one permanent magnet synchronous motor.

3. The electromechanical braking system for a vehicle as claimed in claim 2, characterized in that: The automobile further comprises another set of third wheels and fourth wheels on different sides; The electronic mechanical braking system also includes: the permanent magnet synchronous motor driven by the first drive circuit or the second drive circuit and corresponding to the third wheel and the fourth wheel one by one.

4. The electromechanical braking system for a vehicle as claimed in claim 3, characterized in that: Also includes: A first redundant circuit, a first switch unit; The first redundant circuit comprises: one power supply module, one control module, two permanent magnet synchronous motor pre-drive modules and two permanent magnet synchronous motor drive modules, one control module controls the two permanent magnet synchronous motor pre-drive modules, and each permanent magnet synchronous motor pre-drive module drives one permanent magnet synchronous motor drive module; The first redundant circuit is arranged in parallel with the first driving circuit, and is used to drive the corresponding permanent magnet synchronous motor when a failure occurs in the first driving circuit; The first switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the corresponding permanent magnet synchronous motor and the first drive circuit after a failure occurs in the first drive circuit, and connect the corresponding permanent magnet synchronous motor to the first redundant circuit; or, The first redundant circuit is arranged in parallel with the second driving circuit, and is used to drive the corresponding permanent magnet synchronous motor when the second driving circuit fails; The first switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the corresponding permanent magnet synchronous motor and the second drive circuit after a failure occurs in the second drive circuit, and connect the corresponding permanent magnet synchronous motor to the first redundant circuit.

5. The electromechanical braking system for a vehicle as claimed in claim 4, characterized in that: include: One of the first redundant circuits is provided on two of the first drive circuits corresponding to the first wheel and the second wheel, or the third wheel and the fourth wheel; or, One of the first redundant circuits is provided on one of the second driving circuits corresponding to the first wheel and the second wheel, or the third wheel and the fourth wheel; One of the first switch units is provided between the permanent magnet synchronous motor corresponding to the first wheel or the third wheel and the permanent magnet synchronous motor drive module, and another of the first switch units is provided between the permanent magnet synchronous motor corresponding to the second wheel or the fourth wheel and the permanent magnet synchronous motor drive module; After a failure occurs in the first wheel or the third wheel, the first switch unit switches the permanent magnet synchronous motor corresponding to the first wheel or the third wheel to be connected to one of the permanent magnet synchronous motor drive modules in the first redundant circuit, and / or, after a failure occurs in the second wheel or the fourth wheel, the first switch unit switches the permanent magnet synchronous motor corresponding to the second wheel or the fourth wheel to be connected to another permanent magnet synchronous motor drive module in the first redundant circuit.

6. The electromechanical braking system for a vehicle as claimed in claim 4, characterized in that: include: A first electronic control unit including two of the first drive circuits, and a second electronic control unit including another two of the first drive circuits; or, The first electronic control unit includes one second drive circuit, and the second electronic control unit includes another second drive circuit; The first electronic control unit is used to drive the two permanent magnet synchronous motors connected to the first wheel and the second wheel of the vehicle, and the second electronic control unit is used to drive the two permanent magnet synchronous motors connected to the third wheel and the fourth wheel of the vehicle.

7. The electromechanical braking system for a vehicle as claimed in claim 6, characterized in that: Also includes: A second redundant circuit and a second switch unit; The second redundant circuit comprises: a power supply module, a control module, a permanent magnet synchronous motor pre-drive module and a permanent magnet synchronous motor drive module; The second redundant circuit is arranged in the first electronic control unit, and / or is arranged in the second electronic control unit and is arranged in parallel with the first drive circuit, and is used to drive the corresponding permanent magnet synchronous motor when the first drive circuit fails; The second switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the corresponding permanent magnet synchronous motor and the first drive circuit after a failure occurs in the first drive circuit, and connect the permanent magnet synchronous motor to the second redundant circuit; or, The second redundant circuit is arranged in the first electronic control unit, and / or arranged in the second electronic control unit, and is arranged in parallel with the second drive circuit, and is used to drive the permanent magnet synchronous motor after a failure occurs in the second drive circuit; The second switch unit is arranged between the permanent magnet synchronous motor drive module and the permanent magnet synchronous motor, and is used to cut off the connection between the permanent magnet synchronous motor and the second drive circuit and connect the permanent magnet synchronous motor to the second redundant circuit after a failure occurs in the second drive circuit.

8. The electromechanical braking system for a vehicle as claimed in claim 7, characterized in that: include: One second redundant circuit is respectively provided in the first electronic control unit and the second electronic control unit; A second switch unit is provided between the permanent magnet synchronous motor and the permanent magnet synchronous motor drive module corresponding to the first wheel or the second wheel, and another second switch unit is provided between the permanent magnet synchronous motor and the permanent magnet synchronous motor drive module corresponding to the third wheel or the fourth wheel; After a failure occurs in the first wheel or the second wheel, the second switch unit switches the permanent magnet synchronous motor corresponding to the first wheel or the second wheel to be connected to the permanent magnet synchronous motor drive module in the second redundant circuit, and / or, after a failure occurs in the third wheel or the fourth wheel, the second switch unit switches the permanent magnet synchronous motor corresponding to the third wheel or the fourth wheel to be connected to the permanent magnet synchronous motor drive module in the second redundant circuit.

9. The electromechanical braking system for a vehicle as claimed in claim 7, characterized in that: The first switch unit and the second switch unit include: a single-pole double-throw switch.

10. An automobile, characterized in that: An electronic mechanical braking system for a vehicle comprising the electronic mechanical braking system as described in any one of claims 1 to 9.

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