Electric control brake fault processing system

Abstract

The invention provides an electric control brake fault processing system which comprises a control unit, and a valve power supply interface, a motor power supply interface, a valve switch unit, a motor switch unit and a change-over switch unit which are connected with the control unit, the control unit is used for determining the current state of the electric control brake fault processing system according to the valve power supply voltage of the valve power supply interface, a preset valve power supply voltage threshold value, the motor power supply voltage of the motor power supply interface and a preset motor power supply voltage threshold value, and if the current state is a valve power supply fault state, the valve switch unit is controlled to be switched off. And if the current state is a motor power supply fault state, the motor switch unit is controlled to be switched off, and the change-over switch unit is controlled to be switched on. Power supply of the valve load and the motor load is guaranteed in the valve power supply fault state and the motor power supply fault state, so that the braking capacity of the whole vehicle is guaranteed, and the safety of the whole vehicle is improved.

Description

Technical Field

[0001] The present application relates to the field of chassis electronic control technology, and in particular to an electronically controlled brake fault handling system. Background Art

[0002] The transformation from traditional vehicles to new energy vehicles is the main trend of current automobile development. In new energy vehicles, the motor system not only provides driving force for vehicle driving, but also provides assistance for vehicle braking. Among them, the motor system includes an integrated hydraulic wire control brake system.

[0003] At present, the power supply of the integrated hydraulic brake-by-wire system on the whole vehicle is usually divided into two routes, namely the valve line power supply and the motor line power supply. If either power supply is lost, a fault will occur, resulting in no brake assist in the system, and the safety of the whole vehicle cannot be guaranteed. Summary of the invention

[0004] The purpose of this application is to provide an electronically controlled brake fault handling system to address the deficiencies in the above-mentioned prior art, so as to solve the problem of insufficient vehicle safety in the prior art.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] In a first aspect, the present application provides an electronically controlled brake fault processing system, the electronically controlled brake fault processing system comprising: a control unit, and a valve power supply interface, a motor power supply interface, a valve switch unit, a motor switch unit and a switching switch unit connected to the control unit;

[0007] The valve power supply interface is connected to the valve power supply, the motor power supply interface is connected to the motor power supply, the valve power supply interface is also connected to the first end of the valve switch unit, the second end of the valve switch unit is respectively connected to the valve load and the first end of the switching switch unit, the motor power supply interface is also connected to the first end of the motor switch unit, the second end of the motor switch unit is respectively connected to the motor load and the second end of the switching switch unit;

[0008] The control unit is used to determine the current state of the electronically controlled brake fault handling system according to the valve power supply voltage of the valve power supply interface, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface, and the preset motor power supply voltage threshold, wherein the current state includes: valve power supply fault state, motor power supply fault state, valve power supply normal state, or motor power supply normal state;

[0009] If the current state is a valve power supply failure state, the valve switch unit is controlled to be turned off, and the switching switch unit is controlled to be turned on, so that the motor switch unit is connected to the valve load through the switching switch unit, and the valve load and the motor load are powered by the motor power supply. If the current state is a motor power supply failure state, the motor switch unit is controlled to be turned off, and the switching switch unit is controlled to be turned on, so that the valve switch unit is connected to the motor load through the switching switch unit, and the valve load and the motor load are powered by the valve power supply.

[0010] Optionally, determining the current state of the electronically controlled brake fault handling system according to the valve power supply voltage of the valve power supply interface, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface, and the preset motor power supply voltage threshold includes:

[0011] If the valve power supply voltage of the valve power supply interface is less than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface is greater than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset fault anti-shake time threshold, then the current state is determined to be a valve power supply fault state.

[0012] Optionally, determining the current state of the electronically controlled brake fault handling system according to the valve power supply voltage of the valve power supply interface, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface, and the preset motor power supply voltage threshold includes:

[0013] If the valve power supply voltage of the valve power supply interface is greater than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface is less than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset fault anti-shake time threshold, then the current state is determined to be a motor power supply fault state.

[0014] Optionally, determining the current state of the electronically controlled brake fault handling system according to the valve power supply voltage of the valve power supply interface, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface, and the preset motor power supply voltage threshold includes:

[0015] If the current state is a valve power supply failure state, and the valve power supply voltage of the valve power supply interface is greater than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface is greater than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset recovery anti-shake time threshold, it is determined that the current state is a normal valve power supply state.

[0016] Optionally, the control unit is further used for:

[0017] If the current state is the normal valve power supply state, the valve switch unit is controlled to be turned on, and the switching switch unit is controlled to be turned off, so that the valve power supply supplies power to the valve load, and the motor power supply supplies power to the motor load.

[0018] Optionally, determining the current state of the electronically controlled brake fault handling system according to the valve power supply voltage of the valve power supply interface, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface, and the preset motor power supply voltage threshold includes:

[0019] If the current state is a motor power supply failure state, and the valve power supply voltage of the valve power supply interface is greater than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface is greater than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset recovery anti-shake time threshold, it is determined that the current state is a normal motor power supply state.

[0020] Optionally, the control unit is further used for:

[0021] If the current state is the normal motor power supply state, the motor switch unit is controlled to be turned on, and the switching switch unit is controlled to be turned off, so that the valve power supply supplies power to the valve load, and the motor power supply supplies power to the motor load.

[0022] Optionally, the control unit is further used for:

[0023] In the process of controlling the target unit to be turned on or off, a function request shielding signal is output, wherein the function request shielding signal is used to shield the target function request, wherein the target unit is any one of the valve switch unit, the motor switch unit and the switching switch unit.

[0024] Optionally, the control unit is further used for:

[0025] If the current state is a valve fault state or a motor fault state, a function degradation signal is output, and the function degradation signal is used to shield the preset high power consumption function instruction.

[0026] Optionally, the switching unit includes: a first MOS tube and a second MOS tube;

[0027] The drain of the first MOS tube is connected to the second end of the valve switch unit, the source of the first MOS tube is connected to the source of the second MOS tube, and the gate of the first MOS tube is connected to the control end of the control unit;

[0028] The drain of the second MOS tube is connected to the second end of the motor switch unit, and the gate of the second MOS tube is connected to the control end of the control unit.

[0029] The beneficial effects of the present application are as follows: the electric brake fault handling system includes a control unit, a valve power supply interface, a motor power supply interface, a valve switch unit, a motor switch unit and a switching switch unit. The control unit is used to determine the current state according to the valve power supply voltage and the motor power supply voltage, and control the valve switch unit to turn off when the current state is a valve power supply fault state, and control the switching switch unit to turn on, and provide power to the valve load while ensuring the circuit is stable. When the current state is a motor power supply fault state, the motor switch unit is controlled to turn off, and the switching switch unit is controlled to turn on, and power is provided to the motor load while ensuring the circuit is stable. By ensuring the power supply of the valve load and the motor load under the valve power supply fault state and the motor power supply fault, the braking ability of the whole vehicle is guaranteed and the safety of the whole vehicle is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a structural schematic diagram of an electronically controlled brake fault processing system provided in an embodiment of the present application;

[0032] Figure 2 is a structural schematic diagram of a switching switch unit provided in an embodiment of the present application;

[0033] Figure 3 is a structural schematic diagram of a valve switch unit provided in an embodiment of the present application;

[0034] Figure 4 It is a structural schematic diagram of a motor switch unit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0036] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0037] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0038] At present, the power supply of the integrated hydraulic brake-by-wire system on the whole vehicle is usually divided into two routes, namely the valve line power supply and the motor line power supply. If either power supply is lost, a fault will occur, resulting in no brake assist in the system, and the safety of the whole vehicle cannot be guaranteed.

[0039] Based on this, the present application provides an electronically controlled brake fault handling system, which includes a control unit, a valve power supply interface, a motor power supply interface, a valve switch unit, a motor switch unit and a switching switch unit. The control unit is used to determine the current state of the electronically controlled brake fault handling system based on the detected valve power supply voltage of the valve power supply interface and the motor power supply voltage of the motor power supply interface, as well as the valve power supply motor threshold and the motor power supply voltage threshold. If the current state is a valve power supply fault state, the valve switch unit is controlled to be turned off, and the switching switch is controlled to be turned on, so that the motor power supply supplies power to the valve load and the motor load at the same time. If the current state is a motor power supply fault state, the motor switch unit is controlled to be turned off, and the switching switch unit is controlled to be turned on, so that the valve power supply supplies power to the valve load and the motor load at the same time, thereby providing braking assistance and ensuring the safety of the entire vehicle.

[0040] The integrated hydraulic brake-by-wire system achieves braking by combining the electronic system and the hydraulic system. At present, the power supply of the integrated hydraulic brake-by-wire system on the whole vehicle is usually divided into valve power supply lines and motor power supply lines, so as to respectively supply power to various valves and various motors in the integrated hydraulic brake-by-wire system.

[0041] Next, refer to Figure 1 The structure of the electronic brake fault handling system is introduced. Figure 1 Schematic diagram of the structure of an electronically controlled brake fault handling system provided in an embodiment of the present application. Figure 1As shown, the electric brake fault processing system includes: a control unit 60, and a valve power supply interface 10, a motor power supply interface 30, a valve switch unit 20, a motor switch unit 40 and a switching switch unit 50 connected to the control unit 60.

[0042] Optionally, the valve power supply interface 10 is connected to the valve power supply, and the motor power supply interface 30 is connected to the motor power supply. The valve power supply interface 10 is also connected to the first end of the valve switch unit 20, and the second end of the valve switch unit 20 is respectively connected to the valve load and the first end of the switching unit 50.

[0043] Optionally, the motor power supply interface 30 is also connected to the first end of the motor switch unit 40, and the second end of the motor switch unit 40 is respectively connected to the motor load and the second end of the switching unit 50. The control unit 60 is respectively connected to the third end of the valve switch unit 20, the third end of the motor switch unit 40, and the third end of the switching unit 50.

[0044] As an optional embodiment, the electric brake fault handling system also includes a valve basic power supply and a motor basic power supply. Specifically, the valve power supply interface 10 is also connected to the valve basic power supply, and the motor power supply interface 30 is also connected to the motor basic power supply. Among them, the valve basic power supply is used to provide a basic DC power supply for the valve switch unit 20 and the valve load. The motor basic power supply is used to provide a basic DC power supply for the motor switch unit 40 and the motor load.

[0045] As an optional implementation, the electronic brake fault handling system further includes a valve voltage detection unit and a motor voltage detection unit. The valve voltage detection unit and the motor voltage detection unit are respectively connected to the control unit 60. The valve voltage detection unit is used to detect the voltage at the valve power supply interface 10, and the motor voltage detection unit is used to detect the voltage at the motor power supply interface 30.

[0046] As an optional implementation, the electronic brake fault handling system further includes a valve detection interface and a motor detection interface, which are used to provide detection interfaces for external circuits, so that the external circuit can detect the valve power supply circuit and the motor power supply circuit. The valve power supply circuit can be a circuit composed of a valve power supply, a valve power supply interface 10, a valve switch unit 20, and a valve load, and the motor power supply circuit can be a circuit composed of a motor power supply, a motor power supply interface 30, a motor switch unit 40, and a motor load.

[0047] It is worth noting that the electronically controlled brake fault processing system may further include multiple interfaces, such as a load interface and a detection interface, to achieve more extended functions. This embodiment does not limit this.

[0048] Optionally, when the electric brake fault handling system is operating normally, the valve switch unit 20 and the motor switch unit 40 are turned on, the switching switch unit 50 is turned off, the valve power supply supplies power to the valve load through the valve power supply interface 10 and the valve switch unit 20, and the motor power supply supplies power to the motor load through the motor power supply interface 30 and the motor switch unit 40.

[0049] However, when the valve power supply and the motor power supply fail to supply power due to a drop or failure, the normal operation of the valve load and the motor load may be affected. Therefore, the control unit 60 needs to perform the following steps to enable the electric control brake fault handling system to operate normally.

[0050] Next, the functions of the control unit 60 are introduced:

[0051] Optionally, the current state of the electronic brake fault handling system is determined based on the valve power supply voltage of the valve power supply interface 10, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface 30, and the preset motor power supply voltage threshold. The current state includes: valve power supply fault state, motor power supply fault state, valve power supply normal state or motor power supply normal state.

[0052] Optionally, the control unit 60 may receive the detected valve power supply voltage of the valve power supply interface 10 and the motor power supply voltage of the motor power supply interface 30. The preset valve power supply voltage threshold and the preset motor power supply voltage threshold may be determined according to the valve power supply voltage and the motor power supply voltage under normal working conditions. Exemplarily, the valve power supply voltage may be 10 volts, the motor power supply voltage may be 10 volts, the preset valve power supply voltage threshold may be 7 volts, and the preset motor power supply voltage threshold may be 7 volts.

[0053] Optionally, the valve power supply fault state may indicate that the valve power supply is lost or in a high resistance state, and the valve power supply voltage is lower than a preset valve power supply voltage threshold. The motor power supply fault state may indicate that the motor power supply is lost or in a high resistance state, and the motor power supply voltage is lower than a preset motor power supply voltage threshold. The valve power supply normal state may indicate that the valve power supply is restored from a lost or high resistance state to a normal connection state, and the motor power supply normal state may indicate that the motor power supply is restored from a lost or high resistance state to a normal connection state.

[0054] Optionally, if the current state is a valve power supply fault state, the valve switch unit 20 is controlled to be turned off, and the switching switch unit 50 is controlled to be turned on, so that the motor switch unit 40 is connected to the valve load through the switching switch unit 50, and the valve load and the motor load are powered by the motor power supply. If the current state is a motor power supply fault state, the motor switch unit 40 is controlled to be turned off, and the switching switch unit 50 is controlled to be turned on, so that the valve switch unit 20 is connected to the motor load through the switching switch unit 50, and the valve load and the motor load are powered by the valve power supply.

[0055] Optionally, if the current state is a valve power supply failure state, the valve switch unit 20 is first controlled to be turned off, and then the switching switch unit 50 is controlled to be turned on, so as to prevent the circuit from short-circuiting.

[0056] Specifically, when the valve power supply fails, the valve load is powered by the motor power supply, the motor power supply interface 30, the motor switch unit 40 and the switching switch unit 50, and the motor load is powered by the motor power supply, the motor power supply interface 30 and the motor switch unit 40.

[0057] Optionally, if the current state is a motor power supply failure state, the motor switch unit 40 is first controlled to be turned off, and then the switching switch unit 50 is controlled to be turned on, so as to prevent the circuit from short-circuiting.

[0058] Specifically, when the motor power supply fails, the motor load is powered by the valve power supply, the valve power supply interface 10, the valve switch unit 20 and the switching switch unit 50, and the valve load is powered by the valve power supply, the valve power supply interface 10 and the valve switch unit 20.

[0059] In this embodiment, the electric brake fault handling system includes a control unit, a valve power supply interface, a motor power supply interface, a valve switch unit, a motor switch unit and a switching switch unit. The control unit is used to determine the current state according to the valve power supply voltage and the motor power supply voltage, and control the valve switch unit to turn off when the current state is a valve power supply fault state, and control the switching switch unit to turn on, and provide power to the valve load while ensuring the circuit is stable. When the current state is a motor power supply fault state, the motor switch unit is controlled to turn off, and the switching switch unit is controlled to turn on, and provide power to the motor load while ensuring the circuit is stable. By ensuring the power supply of the valve load and the motor load under the valve power supply fault state and the motor power supply fault, the braking capacity of the whole vehicle is guaranteed, and the safety of the whole vehicle is improved.

[0060] The current state includes: valve power supply fault state, motor power supply fault state, valve power supply normal state or motor power supply normal state. Next, the judgment methods of valve power supply fault state, motor power supply fault state, valve power supply normal state or motor power supply normal state are described in turn.

[0061] As an optional implementation, if the valve power supply voltage of the valve power supply interface 10 is less than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface 30 is greater than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset fault anti-shake time threshold, then the current state is determined to be a valve power supply fault state.

[0062] The maintenance duration refers to the duration during which the valve power supply voltage of the valve power supply interface 10 is less than the preset valve power supply voltage threshold and the motor power supply voltage of the motor power supply interface 30 is greater than the preset motor power supply voltage threshold.

[0063] Specifically, the duration from when the valve power supply voltage of the valve power supply interface 10 is less than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface 30 is greater than the preset motor power supply voltage threshold, to when the valve power supply voltage of the valve power supply interface 10 is not less than the preset valve power supply voltage threshold can be used as the maintenance duration. If from the start of the timing to the current moment, the valve power supply voltage of the valve power supply interface 10 is continuously less than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface 30 is continuously greater than the preset motor power supply voltage threshold, then the duration from the start of the counting to the current moment is the maintenance duration.

[0064] Exemplarily, the preset fault anti-shake time threshold is 1 minute. If at 10:00 on January 1, it is determined that the valve power supply voltage of the valve power supply interface 10 is less than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface 30 is greater than the preset motor power supply voltage threshold, and the above state has not changed until the current moment, if the current moment is 10:01:01 on January 1, the maintenance duration is greater than the preset fault anti-shake time threshold, and the current state is a valve power supply fault state.

[0065] In this embodiment, the current state is determined by judging whether the maintenance time is greater than a preset fault anti-shake time threshold, thereby avoiding erroneous judgment caused by unstable power supply of the valve power supply.

[0066] As an optional implementation, if the valve power supply voltage of the valve power supply interface 10 is greater than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface 30 is less than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset fault anti-shake time threshold, then the current state is determined to be a motor power supply fault state.

[0067] Optionally, the maintenance duration refers to the duration during which the motor power supply voltage of the motor power supply interface 30 is less than a preset motor power supply voltage threshold and the valve power supply voltage of the valve power supply interface 10 is greater than a preset valve power supply voltage threshold.

[0068] Specifically, the duration from when the motor power supply voltage of the motor power supply interface 30 is less than the preset motor power supply voltage threshold, and the valve power supply voltage of the valve power supply interface 10 is greater than the preset valve power supply voltage threshold, to when the motor power supply voltage of the motor power supply interface 30 is not less than the preset motor power supply voltage threshold can be used as the maintenance duration. If from the start of the timing to the current moment, the motor power supply voltage of the motor power supply interface 30 is continuously less than the preset motor power supply voltage threshold, and the valve power supply voltage of the valve power supply interface 10 is continuously greater than the preset valve power supply voltage threshold, then the duration from the start of the counting to the current moment is the maintenance duration.

[0069] Exemplarily, the preset fault anti-shake time threshold is 1 minute. If at 10:00 on January 1, it is determined that the motor power supply voltage of the motor power supply interface 30 is less than the preset motor power supply voltage threshold, and the valve power supply voltage of the valve power supply interface 10 is greater than the preset valve power supply voltage threshold, and the above state has not changed until the current moment, if the current moment is 10:01:01 on January 1, the maintenance duration is greater than the preset fault anti-shake time threshold, and the current state is a motor power supply fault state.

[0070] In this embodiment, the current state is determined by judging whether the maintenance time is greater than a preset fault anti-shake time threshold, thereby avoiding erroneous judgment caused by unstable power supply of the motor power supply.

[0071] As an optional implementation, if the current state is a valve power supply failure state, and the valve power supply voltage of the valve power supply interface 10 is greater than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface 30 is greater than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset recovery anti-shake time threshold, it is determined that the current state is a normal valve power supply state.

[0072] Optionally, the maintenance duration refers to the duration during which the valve power supply voltage of the valve power supply interface 10 is greater than a preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface 30 is greater than a preset motor power supply voltage threshold.

[0073] It is worth noting that the normal valve power supply state is the state after the valve power supply fault state is converted. In this state, the power supply of the valve load needs to be converted from the motor power supply to the valve power supply to ensure the normal power supply of the valve load and the motor load, and the function of the electric control brake fault handling system is realized.

[0074] In this embodiment, if the current state is a valve power supply failure state, and the valve power supply voltage is greater than the preset valve power supply voltage threshold, and the motor power supply voltage is greater than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset recovery anti-shake time threshold, then the current state is determined to be a valve power supply normal state, thereby ensuring the valve power supply recovery while avoiding misjudgment caused by unstable valve power supply.

[0075] Further, if the current state is the normal valve power supply state, the valve switch unit 20 is controlled to be turned on, and the switching switch unit 50 is controlled to be turned off, so that the valve power supply supplies power to the valve load, and the motor power supply supplies power to the motor load.

[0076] Optionally, if the current state is the normal valve power supply state, the valve switch unit 20 is first controlled to be turned on, and then the switching switch unit 50 is controlled to be turned off, thereby ensuring that the valve load can receive power normally during the switching process and avoiding circuit short circuit.

[0077] Optionally, when the current state is the normal valve power supply state, the valve switch unit 20 is controlled to be turned on and the switching switch unit 50 is controlled to be turned off, thereby ensuring the normal operation of the valve load.

[0078] As an optional implementation, if the current state is a motor power supply failure state, and the valve power supply voltage of the valve power supply interface 10 is greater than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface 30 is greater than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset recovery anti-shake time threshold, it is determined that the current state is a normal motor power supply state.

[0079] Optionally, the maintenance duration refers to the duration during which the valve power supply voltage of the valve power supply interface 10 is greater than a preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface 30 is greater than a preset motor power supply voltage threshold.

[0080] It is worth noting that the normal state of motor power supply is the state after the motor power supply fault state is converted. In this state, the power supply of the motor load needs to be converted from the valve power supply to the valve power supply to ensure the normal power supply of the valve load and the motor load, and the function of the electric control brake fault handling system is realized.

[0081] In this embodiment, if the current state is a motor power supply failure state, and the valve supply voltage and the motor supply voltage are respectively greater than the preset valve supply voltage threshold and the preset motor supply voltage threshold, and the maintenance time is greater than the preset recovery anti-shake time threshold, then the current state is determined to be a normal motor power supply state, thereby ensuring the recovery of the motor power supply while avoiding misjudgment caused by unstable motor power supply.

[0082] Further, if the current state is the normal motor power supply state, the motor switch unit 40 is controlled to be turned on, and the switching switch unit 50 is controlled to be turned off, so that the valve power supply supplies power to the valve load, and the motor power supply supplies power to the motor load.

[0083] Specifically, if the current state is the normal motor power supply state, the motor switch unit 40 is first controlled to be turned on, and then the switching switch unit 50 is controlled to be turned off, thereby ensuring that the motor load has normal power supply during the switching process of the switch unit to avoid circuit short circuit.

[0084] In this embodiment, when the motor power supply is normal, the motor switch unit is controlled to be turned on, and the switching switch unit is controlled to be turned off, thereby ensuring normal power supply to the motor load and normal operation of the electric control brake fault handling system.

[0085] As an optional embodiment, in addition to executing the above functions, the control unit 60 can also execute the following functions: in the process of controlling the target unit to be turned on or off, output a function request shielding signal, and the function request shielding signal is used to shield the target function request, wherein the target unit is any one of the valve switch unit 20, the motor switch unit 40 and the switching switch unit 50.

[0086] Specifically, during the process of controlling the valve switch unit 20, the motor switch unit 40 and the switching switch unit 50 to be turned on or off, that is, during the switching process between the valve power supply fault state, the motor power supply fault state, the valve power supply normal state or the motor power supply normal state, the control unit 60 outputs a function request shielding signal, thereby shielding the target function request. Among them, the target function request can be a request for a high-power consumption function other than basic functions such as electric control braking. Since high-power consumption functions consume a lot of power, they may affect the normal execution of basic functions, thereby affecting the safety of the entire vehicle.

[0087] Optionally, the control unit 60 may output a function request shielding signal and send it to a vehicle controller, which is used to control the execution of various systems in the vehicle.

[0088] In this embodiment, by outputting a function request shielding signal during the on- or off-process of the target unit, the normal execution of the basic functions is ensured, thereby ensuring the safety of the entire vehicle.

[0089] As an optional implementation, the control unit 60 in the electronic brake fault handling system is also used to perform the following functions: if the current state is a valve fault state or a motor fault state, a function degradation signal is output, and the function degradation signal is used to shield the preset high power consumption function instructions.

[0090] Specifically, when the current state is a valve fault state, the motor power supply supplies power to the valve load and the motor load at the same time. When the current state is a motor fault state, the valve power supply supplies power to the valve load and the motor load at the same time.

[0091] Since the valve load and the motor load are powered by one power supply when the valve is in a fault state and the motor is in a fault state, the power is reduced and high-power consumption functions cannot be completed.

[0092] Based on this, the control unit 60 outputs a function degradation signal, thereby shielding the preset high power consumption function instruction. Specifically, the electric control brake fault processing system receives the preset high power consumption function instruction, but does not execute according to the preset high power consumption function instruction.

[0093] The preset high power consumption function instruction may be issued by the vehicle controller or a controller other than the vehicle controller. This embodiment does not limit this.

[0094] In this embodiment, a function degradation signal is output when the valve is in a fault state or the motor is in a fault state, thereby ensuring normal execution of the basic brake function.

[0095] Next, refer to Figure 2 The specific structure of the switch unit 50 in the electric brake fault processing system is introduced. Figure 2 It is a structural schematic diagram of a switching switch unit provided in an embodiment of the present application.

[0096] Optionally, the switch unit 50 includes: a first MOS transistor M1 and a second MOS transistor M2.

[0097] Optionally, the drain of the first MOS tube M1 is connected to the second end of the valve switch unit 20 , the source of the first MOS tube M1 is connected to the source of the second MOS tube M2 , and the gate of the first MOS tube M1 is connected to the control end of the control unit 60 .

[0098] Optionally, the drain of the second MOS transistor M2 is connected to the second end of the motor switch unit 40 , and the gate of the second MOS transistor M2 is connected to the control end of the control unit 60 .

[0099] Specifically, the connection structure of the first MOS tube M1 and the second MOS tube M2 is used to prevent power reverse connection, thereby preventing the reverse connection of the power supply from causing damage to the valve load and the motor load.

[0100] Optionally, when the current state is a valve power supply fault state, it is necessary to control the switching unit 50 to be turned on, then the first MOS tube M1 is turned on, and then the second MOS tube M2 is turned on. When the current state is a motor power supply fault state, it is necessary to control the switching unit 50 to be turned on, then the second MOS tube M2 is turned on, and then the first MOS tube M1 is turned on. When the current state is a valve power supply normal state, it is necessary to control the switching unit 50 to be turned off, then the first MOS tube M1 is turned off, and then the second MOS tube M2 is turned off. When the current state is a motor power supply normal state, it is necessary to control the switching unit 50 to be turned off, then the second MOS tube M2 is turned off, and then the first MOS tube M1 is turned off.

[0101] Further, refer to Figure 3The structure of the valve switch unit 20 is introduced. Figure 3 It is a structural schematic diagram of a valve switch unit provided in an embodiment of the present application.

[0102] Optionally, the valve switch unit 20 includes: a third MOS tube M3 and a fourth MOS tube M4.

[0103] Optionally, the drain of the third MOS tube M3 is connected to the valve power supply interface 10 , the source of the third MOS tube M3 is connected to the source of the fourth MOS tube M4 , and the gate of the third MOS tube M3 is connected to the control unit 60 .

[0104] Optionally, the drain of the fourth MOS tube M4 is connected to the first end of the switching unit 50 and the valve load respectively, and the gate of the fourth MOS tube M4 is connected to the control unit 60 .

[0105] Further, refer to Figure 4 The structure of the motor switch unit 40 is introduced. Figure 4 It is a structural schematic diagram of a motor switch unit provided in an embodiment of the present application.

[0106] Optionally, the motor switch unit 40 includes a fifth MOS transistor M5 and a sixth MOS transistor M6.

[0107] Optionally, the drain of the fifth MOS tube M5 is connected to the motor power supply interface 30 , the source of the fifth MOS tube M5 is connected to the source of the sixth MOS tube M6 , and the gate of the fifth MOS tube M5 is connected to the control unit 60 .

[0108] Optionally, the drain of the sixth MOS tube M6 is connected to the second end of the switching unit 50 and the motor load respectively, and the gate of the sixth MOS tube M6 is connected to the control unit 60 .

[0109] As an optional implementation, the electric control brake fault processing system further includes a valve basic power supply and a motor basic power supply. The valve basic power supply is connected to the valve power supply interface 10, and the motor basic power supply is connected to the motor power supply interface 30.

[0110] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. An electronically controlled brake fault handling system, characterized in that: The electronically controlled brake fault processing system comprises: a control unit, and a valve power supply interface, a motor power supply interface, a valve switch unit, a motor switch unit and a switching switch unit connected to the control unit; The valve power supply interface is connected to the valve power supply, the motor power supply interface is connected to the motor power supply, the valve power supply interface is also connected to the first end of the valve switch unit, the second end of the valve switch unit is respectively connected to the valve load and the first end of the switching switch unit, the motor power supply interface is also connected to the first end of the motor switch unit, the second end of the motor switch unit is respectively connected to the motor load and the second end of the switching switch unit; The control unit is used to determine the current state of the electronically controlled brake fault handling system according to the valve power supply voltage of the valve power supply interface, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface, and the preset motor power supply voltage threshold, wherein the current state includes: valve power supply fault state, motor power supply fault state, valve power supply normal state, or motor power supply normal state; If the current state is a valve power supply failure state, the valve switch unit is controlled to be turned off, and the switching switch unit is controlled to be turned on, so that the motor switch unit is connected to the valve load through the switching switch unit, and the valve load and the motor load are powered by the motor power supply. If the current state is a motor power supply failure state, the motor switch unit is controlled to be turned off, and the switching switch unit is controlled to be turned on, so that the valve switch unit is connected to the motor load through the switching switch unit, and the valve load and the motor load are powered by the valve power supply.

2. The electronically controlled brake fault handling system according to claim 1, characterized in that: Determining the current state of the electronically controlled brake fault handling system according to the valve power supply voltage of the valve power supply interface, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface, and the preset motor power supply voltage threshold includes: If the valve power supply voltage of the valve power supply interface is less than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface is greater than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset fault anti-shake time threshold, then the current state is determined to be a valve power supply fault state.

3. The electronically controlled brake fault handling system according to claim 1, characterized in that: Determining the current state of the electronically controlled brake fault handling system according to the valve power supply voltage of the valve power supply interface, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface, and the preset motor power supply voltage threshold includes: If the valve power supply voltage of the valve power supply interface is greater than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface is less than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset fault anti-shake time threshold, then the current state is determined to be a motor power supply fault state.

4. The electronically controlled brake fault handling system according to claim 1, characterized in that: Determining the current state of the electronically controlled brake fault handling system according to the valve power supply voltage of the valve power supply interface, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface, and the preset motor power supply voltage threshold includes: If the current state is a valve power supply failure state, and the valve power supply voltage of the valve power supply interface is greater than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface is greater than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset recovery anti-shake time threshold, it is determined that the current state is a normal valve power supply state.

5. The electronically controlled brake fault handling system according to claim 4, characterized in that: The control unit is also used for: If the current state is the normal valve power supply state, the valve switch unit is controlled to be turned on, and the switching switch unit is controlled to be turned off, so that the valve power supply supplies power to the valve load, and the motor power supply supplies power to the motor load.

6. The electronically controlled brake fault handling system according to claim 1, characterized in that: Determining the current state of the electronically controlled brake fault handling system according to the valve power supply voltage of the valve power supply interface, the preset valve power supply voltage threshold, the motor power supply voltage of the motor power supply interface, and the preset motor power supply voltage threshold includes: If the current state is a motor power supply failure state, and the valve power supply voltage of the valve power supply interface is greater than the preset valve power supply voltage threshold, and the motor power supply voltage of the motor power supply interface is greater than the preset motor power supply voltage threshold, and the maintenance time is greater than the preset recovery anti-shake time threshold, it is determined that the current state is a normal motor power supply state.

7. The electronically controlled brake fault handling system according to claim 6, characterized in that: The control unit is also used for: If the current state is the normal motor power supply state, the motor switch unit is controlled to be turned on, and the switching switch unit is controlled to be turned off, so that the valve power supply supplies power to the valve load, and the motor power supply supplies power to the motor load.

8. The electronically controlled brake fault handling system according to claim 1, characterized in that: The control unit is also used for: In the process of controlling the target unit to be turned on or off, a function request shielding signal is output, wherein the function request shielding signal is used to shield the target function request, wherein the target unit is any one of the valve switch unit, the motor switch unit and the switching switch unit.

9. The electronically controlled brake fault handling system according to claim 1, characterized in that: The control unit is also used for: If the current state is a valve fault state or a motor fault state, a function degradation signal is output, and the function degradation signal is used to shield the preset high power consumption function instruction.

10. The electronically controlled brake fault handling system according to claim 1, characterized in that: The switching unit comprises: a first MOS tube and a second MOS tube; The drain of the first MOS tube is connected to the second end of the valve switch unit, the source of the first MOS tube is connected to the source of the second MOS tube, and the gate of the first MOS tube is connected to the control end of the control unit; The drain of the second MOS tube is connected to the second end of the motor switch unit, and the gate of the second MOS tube is connected to the control end of the control unit.

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