Electronic parking brake control system and vehicle

Abstract

The utility model discloses an electronic parking brake control system and a vehicle. The system comprises a main controller, an auxiliary controller, a left side electronic caliper and a right side electronic caliper. The main controller comprises a first brake control module and a second brake control module, the first brake control module is connected with the right side electronic caliper, and the second brake control module is connected with the left side electronic caliper; the auxiliary controller comprises a third brake control module and a caliper control switch, the third brake control module is connected with the caliper control switch, and the caliper control switch is selectively connected with the left side electronic caliper and the right side electronic caliper. The main controller is arranged to be two independent control modules to correspondingly and independently control the left side electronic caliper and the right side electronic caliper so as to guarantee independence and reliability of control over the left side electronic caliper and the right side electronic caliper, in addition, when any one control module fails, the auxiliary controller can be controlled to conduct brake function supplement control, and the brake function supplement control efficiency is improved. Therefore, a guarantee is provided for parking safety.

Description

Technical Field

[0001] The utility model relates to the technical field of brake systems, in particular to an electronic parking brake control system and a vehicle. Background Art

[0002] With the rapid development of new energy vehicles, from the perspective of space layout and cost control, canceling the gearbox P gear locking mechanism originally only available in fuel vehicles will become a new trend. In this case, in order to meet the design requirements of the national standard GB21760 for parking brake P gear redundancy, and also to meet the functional safety requirements of parking in ISO26262, it is necessary to design a redundant control architecture for the electronic parking brake system and a new strategy that can achieve safe redundant switching. Utility Model Content

[0003] The utility model aims to provide an electronic parking brake control system and a vehicle, and designs a new control architecture and control strategy to solve the problem of safe parking.

[0004] According to a first aspect of an embodiment of the utility model, there is provided an electronic parking brake control system, comprising a main controller, an auxiliary controller, a left electronic caliper and a right electronic caliper;

[0005] The main controller includes a first brake control module and a second brake control module, the first brake control module is connected to the right electronic caliper through a control line, and the second brake control module is connected to the left electronic caliper through a control line;

[0006] The auxiliary controller includes a third brake control module and a caliper control switch, wherein the third brake control module is connected to the caliper control switch via a control line, and the caliper control switch can be selectively connected to the left electronic caliper and the right electronic caliper;

[0007] When one of the first brake control module and the second brake control module fails, the third brake control module controls the caliper control switch to connect the failed electronic caliper.

[0008] A further improvement of the electronic parking brake control system of the utility model is that the main controller includes a first PCB carrying the first brake control module and a second PCB carrying the second brake control module, and the first PCB and the second PCB are stacked.

[0009] A further improvement of the electronic parking brake control system of the utility model is that the first brake control module includes a first MCU and a first parking control circuit, and the first parking control circuit is connected to the right electronic caliper.

[0010] A further improvement of the electronic parking brake control system of the utility model is that the second brake control module includes a second MCU and a second parking control circuit, and the second parking control circuit is connected to the left electronic caliper.

[0011] A further improvement of the electronic parking brake control system of the utility model is that the main controller also includes a first power supply arranged on the first PCB, and the first power supply is connected to the first MCU.

[0012] A further improvement of the electronic parking brake control system of the utility model is that the main controller further includes a second power supply arranged on the second PCB, and the second power supply is connected to the second MCU.

[0013] A further improvement of the electronic parking brake control system of the utility model is that the first power supply and the second power supply are respectively connected to the vehicle power supply.

[0014] A further improvement of the electronic parking brake control system of the utility model is that the third brake control module includes a third MCU, a third parking control circuit and a third power supply, the third MCU is connected to the caliper control switch through the third parking control circuit, the third power supply is connected to the third MCU, and the third power supply is also connected to the vehicle power supply.

[0015] According to a second aspect of an embodiment of the utility model, a vehicle is provided, comprising any one of the electronic parking brake control systems described above.

[0016] According to the electronic parking brake control system and vehicle provided by the utility model, the main controller is set to two separate control modules to correspond to the separate control of the left and right electronic calipers, so as to ensure the independence and reliability of the control of the left and right electronic calipers, and avoid the simultaneous failure of the left and right electronic calipers due to the failure of the main controller. In addition, when any control module fails, the auxiliary controller can be controlled to perform supplementary control of the braking function, thereby providing protection for parking safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is described in detail below through exemplary embodiments with reference to the accompanying drawings, wherein:

[0018] Figure 1 A structural block diagram of a vehicle provided by an embodiment of the utility model is shown;

[0019] Figure 2 A control schematic diagram of working condition 1 of an electronic parking brake control system provided by an embodiment of the utility model is shown;

[0020] Figure 3A control schematic diagram of working condition 2 of an electronic parking brake control system provided by an embodiment of the utility model is shown;

[0021] Figure 4 A flow chart of an electronic parking brake control method provided by an embodiment of the present utility model is shown.

[0022] The accompanying drawings are only schematic and not necessarily drawn to scale, and they only show those parts necessary to illustrate the utility model, while other parts may be omitted or only briefly mentioned. That is, in addition to the parts shown in the accompanying drawings, the utility model may also include other parts. DETAILED DESCRIPTION

[0023] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0024] 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.

[0025] In the description of this embodiment, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. These are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the utility model.

[0026] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0027] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "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 embodiment can be understood according to specific circumstances.

[0028] In some existing redundant control systems, an auxiliary controller is provided to perform redundant control of the left and right calipers. That is, when the main controller fails, the auxiliary controller replaces the function of the main controller. This requires that the structure and functional modules of the auxiliary controller be consistent with those of the main controller, thereby increasing the cost.

[0029] In the present application, the main controller is configured to control the left and right electronic calipers separately. When one of them fails, redundant control is performed through the auxiliary controller. This simplifies the design of the auxiliary controller, thereby saving costs and enhancing the reliability of parking control.

[0030] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Figure 1 A structural block diagram of a vehicle provided by an embodiment of the utility model is shown; Figure 2 A control schematic diagram of working condition 1 of an electronic parking brake control system provided by an embodiment of the utility model is shown; Figure 3 A control schematic diagram of working condition 2 of an electronic parking brake control system provided by an embodiment of the utility model is shown.

[0032] Reference Figures 1 to 3 The electronic parking brake control system 100 of the embodiment of the utility model is applied in a vehicle 1000 to realize parking redundant control. The electronic parking brake control system 100 includes a main controller 10, an auxiliary controller 20, a left electronic caliper 40 and a right electronic caliper 30. The vehicle 1000 includes a domain controller, and the main controller 10 and the auxiliary controller 20 are connected to each other through a private CAN (Controller Area Network) line.

[0033] In an optional embodiment, the domain controller is a chassis domain controller. The main controller 10 and the auxiliary controller 20 are integrated in the chassis domain controller, which can realize the centralized control and hardware and software separation of steering, braking, suspension, and even power systems, thereby realizing the lateral, longitudinal, and vertical coordinated control of the vehicle 1000, and improving the comfort and safety of the chassis control of the whole vehicle. Of course, the domain controller of the utility model is not limited to the chassis domain controller, but can also be other controllers in the vehicle 1000. For the convenience of description, the chassis domain controller is used as an example for description below.

[0034] The main controller 10 includes a first brake control module 11 and a second brake control module 12. The first brake control module is connected to the right electronic caliper 30 through a control line, and controls the right electronic caliper 30 to perform brake control after the first brake control module 11 sends a brake control signal. The second brake control module 12 is connected to the left electronic caliper through a control line, and controls the left electronic caliper 40 to perform brake control after the second brake control module 12 sends a brake control signal.

[0035] The auxiliary controller 20 includes a third brake control module 21 and a caliper control switch 22. The third brake control module 21 is connected to the caliper control switch 22 through a control line, and the caliper control switch 22 can be selectively connected to the left electronic caliper 40 and the right electronic caliper 30. When one of the first brake control module 11 and the second brake control module 12 fails, the third brake control module 21 controls the caliper control switch 22 to connect to the failed electronic caliper.

[0036] Specifically, the first brake control module 11 is used to control the right electronic caliper 30, and the second brake control module 12 is used to control the left electronic caliper 40. The first brake control module 11 and the second brake control module 12 are two parts of the main controller 10, which can be controlled independently and their functions are not affected by each other, so that when one of them fails, the other can also work normally. Further, the auxiliary controller 20 can control the faulty electronic caliper by controlling the caliper control switch 22, thereby ensuring that the left and right electronic calipers can work normally and meet the parking safety of the vehicle 1000.

[0037] In one embodiment, the main controller 10 includes a first PCB 13 carrying a first brake control module 11 and a second PCB 14 carrying a second brake control module 12. In this embodiment, each PCB and its functional module cooperate to control an electronic caliper to achieve independent control of each other without affecting each other. The first PCB 13 and the second PCB 14 are stacked, and this design method does not increase the size of the main controller 10.

[0038] Further, the first brake control module 11 includes a first MCU 111 and a first parking control circuit 112, and the first parking control circuit 112 is connected to the right electronic caliper 30. After receiving the parking instruction from the chassis domain controller, the first MCU 111 controls the right electronic caliper 30 through the first parking control circuit 112, so that the right electronic caliper 30 performs braking control.

[0039] The second brake control module 12 includes a second MCU 121 and a second parking control circuit 122, and the second parking control circuit 122 is connected to the left electronic caliper 40. After receiving the parking instruction from the chassis domain controller, the second MCU 121 controls the left electronic caliper 40 through the second parking control circuit 122, so that the left electronic caliper 40 performs braking control.

[0040] In an embodiment of the utility model, the main controller 10 further includes a first power supply 113 disposed on the first PCB 13, the first power supply 113 is connected to the first MCU 111, and is used to supply power to the first MCU 111. The main controller 10 further includes a second power supply 123 disposed on the second PCB 14, the second power supply 123 is connected to the second MCU 121, and is used to supply power to the second MCU 121. The first power supply 113 and the second power supply 123 are respectively connected to the vehicle power supply 50. The main controller 10 realizes a power supply redundancy design by respectively providing power supplies on two PCBs.

[0041] The third brake control module 21 includes a third MCU 211, a third parking control circuit 212 and a third power supply 213. The third MCU 211 is connected to the caliper control switch 22 through the third parking control circuit 212. The third power supply 213 is connected to the third MCU 211, and the third power supply 213 is also connected to the vehicle power supply 50. The auxiliary controller 20 is provided with a separate power supply to ensure the normal operation of the auxiliary controller 20.

[0042] like Figure 4 Combination Figure 2 and Figure 3 As shown, according to another aspect of the embodiment of the present utility model, an electronic parking brake control method is also provided, which is applied to the above-mentioned electronic parking brake control system 100, and the electronic parking brake control method includes:

[0043] S401 , identifying whether the first brake control module 11 and the second brake control module 12 operate normally.

[0044] S402: When it is identified that one of the brake calipers is failed, the third brake control module 21 controls the caliper control switch 22 to connect the failed electronic caliper.

[0045] In this embodiment, after receiving the control signal that the vehicle 1000 needs to park, it first identifies whether the main controller 10 is working properly. Specifically, it detects whether the first brake control module 11 and the second brake control module 12 are working properly. If the main controller 10 is working properly, the main controller 10 is made to work properly. Figure 2 As shown, in the working condition 1 of the electronic parking brake control system of the present invention, if the first brake control module 11 fails, a control instruction is sent to the auxiliary controller 20, so that the auxiliary controller 20 is connected to the right electronic caliper 30 through the caliper control switch 22, so that the auxiliary controller 20 controls the right electronic caliper 30. Figure 3 As shown, in working condition 2 of the electronic parking brake control system of the present invention, if the second brake control module 12 fails, a control instruction is sent to the auxiliary controller 20 so that the auxiliary controller 20 controls the connection to the left electronic caliper 40 through the caliper control switch 22, thereby enabling the auxiliary controller 20 to control the left electronic caliper 40.

[0046] Of course, in another embodiment, if the main controller 10 fails as a whole, that is, both the first brake control module 11 and the second brake control module 12 fail, the auxiliary controller 20 of the utility model can also control the left electronic caliper 40 and the right electronic caliper 30 at the same time.

[0047] The utility model sets the main controller as two separate control modules to respectively control the left and right electronic calipers, so as to ensure the independence and reliability of the control of the left and right electronic calipers, and avoid the simultaneous failure of the left and right electronic calipers due to the failure of the main controller. In addition, when any control module fails, the auxiliary controller can be controlled to perform supplementary control of the braking function, thereby providing protection for parking safety.

[0048] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An electronic parking brake control system, characterized in that: It includes a main controller, an auxiliary controller, a left electronic caliper and a right electronic caliper; The main controller includes a first brake control module and a second brake control module, the first brake control module is connected to the right electronic caliper through a control line, and the second brake control module is connected to the left electronic caliper through a control line; The auxiliary controller includes a third brake control module and a caliper control switch, wherein the third brake control module is connected to the caliper control switch via a control line, and the caliper control switch can be selectively connected to the left electronic caliper and the right electronic caliper; When one of the first brake control module and the second brake control module fails, the third brake control module controls the caliper control switch to connect the failed electronic caliper.

2. The electronic parking brake control system according to claim 1, characterized in that: The main controller includes a first PCB carrying the first brake control module and a second PCB carrying the second brake control module, and the first PCB and the second PCB are stacked.

3. The electronic parking brake control system according to claim 2, characterized in that: The first brake control module includes a first MCU and a first parking control circuit, and the first parking control circuit is connected to the right electronic caliper.

4. The electronic parking brake control system according to claim 3, characterized in that: The second brake control module includes a second MCU and a second parking control circuit, and the second parking control circuit is connected to the left electronic caliper.

5. The electronic parking brake control system according to claim 4, characterized in that: The main controller also includes a first power supply disposed on the first PCB, and the first power supply is connected to the first MCU.

6. The electronic parking brake control system according to claim 5, characterized in that: The main controller also includes a second power supply arranged on the second PCB, and the second power supply is connected to the second MCU.

7. The electronic parking brake control system according to claim 6, characterized in that: The first power source and the second power source are respectively connected to a vehicle power source.

8. The electronic parking brake control system according to claim 1, characterized in that: The third brake control module includes a third MCU, a third parking control circuit and a third power supply. The third MCU is connected to the caliper control switch through the third parking control circuit, the third power supply is connected to the third MCU, and the third power supply is also connected to the vehicle power supply.

9. A vehicle, characterized in that: The electronic parking brake control system comprises the electronic parking brake control system according to any one of claims 1 to 8.

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