CN113830040A

CN113830040A - Electronic parking control system and control method thereof

Info

Publication number: CN113830040A
Application number: CN202110339176.XA
Authority: CN
Inventors: 叶扬波; 丁勇
Original assignee: Shanghai Huizhong Automotive Manufacturing Co Ltd
Current assignee: Shanghai Huizhong Automotive Manufacturing Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-12-24

Abstract

The invention relates to an electronic parking control system and a control method thereof. The electronic parking control system is suitable for automobiles, and the automobiles comprise a complete automobile VCU, a storage battery, a left caliper, a right caliper and an EPB/EPBi/ESC relevant controller. The electronic parking control system mainly comprises a main control MCU module, a first relay module, a second relay module, a pre-drive module, a first H-bridge module and a second H-bridge module, wherein the main control MCU module is used for receiving instructions sent by a VCU of the whole vehicle. The invention provides an electronic parking control system and a control method thereof, which have compact integral circuit, play the aim of double-circuit backup parking and effectively improve the parking performance.

Description

Electronic parking control system and control method thereof

Technical Field

The invention relates to the technical field of control of motor vehicle brake systems, in particular to an electronic parking control system and a control method thereof.

Background

With the development of automobiles and automatic driving, the automobile industry has higher and higher requirements on the safety of ISO26262 functions and higher requirements on the reliability and safety of automobiles, and the trend of increasing failure backups of various controllers for this reason will be in the future. For the electronic parking control system, although there is a P-shift lock as a backup, the P-shift lock can only meet the requirement of making the vehicle stationary on an 8% slope, and cannot meet the requirement of a higher slope. With the development of automatic driving, higher requirements are inevitably put forward on electronic parking backup, so that the development of a new technology or system for improving parking safety is the direction of future development and has certain value and significance.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the electronic parking control system and the control method thereof, the whole circuit is compact, the purpose of double-circuit backup parking is achieved, and the parking performance can be effectively improved.

Specifically, the invention provides an electronic parking control system, which is suitable for an automobile, wherein the automobile comprises a whole automobile VCU, a storage battery, a left caliper, a right caliper and an EPB/EPBi/ESC related controller, and the electronic parking control system comprises:

the main control MCU module is used for receiving an instruction sent by the VCU of the whole vehicle;

the EPB/EPBi/ESC related controller is respectively used for controlling the left caliper and the right caliper to act through the first relay module and the second relay module;

the pre-driving module is connected with the first relay module and the second relay module respectively through the first H bridge module and the second H bridge module, the pre-driving module is electrically connected with the main control MCU module, the pre-driving module receives an instruction of the main control MCU module and controls the first H bridge module and the second H bridge module so that the pre-driving module controls the left caliper and the right caliper to act respectively through the first relay module and the second relay module.

According to one embodiment of the invention, the automobile control system further comprises a CAN communication module, and the main control MCU module is communicated with the whole VCU of the automobile through the CAN communication module.

According to one embodiment of the invention, the power supply module is connected with the storage battery and supplies power to the main control MCU module, the first relay module, the second relay module, the pre-driver module, the first H-bridge module and the second H-bridge module.

According to one embodiment of the invention, the power supply module provides a power supply voltage of 3.3V to the master MCU module.

According to one embodiment of the invention, the EPB/EPBi/ESC related controller and the MGU motor of the left caliper are connected to the normally closed contacts of the first relay module; the EPB/EPBi/ESC related controller and the MGU motor of the right caliper are connected to the normally closed contacts of the second relay module.

According to one embodiment of the present invention, the output contact of the first relay module is electrically connected with the MGU motor of the left caliper, and the output contact of the second relay module is electrically connected with the MGU motor of the right caliper.

According to one embodiment of the invention, the first H-bridge module is electrically connected with the normally open contacts of the first relay module, and the second H-bridge module is electrically connected with the normally open contacts of the second relay module.

According to one embodiment of the invention, the vehicle VCU and EPB/EPBi/ESC associated controller are in communication for transmitting a park signal.

The invention also provides an electronic parking control method, which applies the electronic parking control system, and under the normal mode of the whole vehicle, the EPB/EPBi/ESC related controller receives a parking signal and controls the left caliper and the right caliper to act through the first relay module and the second relay module; when the EPB/EPBi/ESC related controller fails, the main control MCU module receives a parking signal sent by the VCU of the whole vehicle, the pre-drive module receives an instruction of the main control MCU module to control the first H-bridge module and the second H-bridge module, and then the first relay module and the second relay module respectively control the left caliper and the right caliper to act.

According to the electronic parking control system and the control method thereof, the main control MCU module, the first relay module, the second relay module, the pre-drive module, the first H-bridge module and the second H-bridge module are arranged, double-path backup parking control is achieved, the whole circuit is compact, and the parking performance can be effectively improved.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:

fig. 1 shows a schematic configuration diagram of an electronic parking control system according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

electronic parking control system 100 main control MCU module 101

First relay module 102 second relay module 103

Pre-driver module 104 first H-bridge module 105

Second H-bridge module 106 complete vehicle VCU107

Left caliper 109 of battery 108

Right caliper 110 EPB/EPBi/ESC correlation controller 111

CAN communication module 112 power module 113

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented 90 degrees or at other orientations and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

Fig. 1 shows a schematic configuration diagram of an electronic parking control system according to an embodiment of the present invention. As shown in the figure, an electronic parking control system 100 for a vehicle mainly includes a main control MCU module 101, a first relay module 102, a second relay module 103, a pre-driver module 104, a first H-bridge module 105, and a second H-bridge module 106. The automobile comprises a whole VCU107, a storage battery 108, a left caliper 109, a right caliper 110 and an EPB/EPBi/ESC related controller 111.

Further, the main control MCU module 101 is configured to receive an instruction sent by the VCU107 of the entire vehicle.

The first and

second relay modules

102 and 103 are electrically connected to the left and

right calipers

109 and 110, respectively. The first relay module 102 and the second relay module 103 are also connected with the main control MCU module 101. The EPB/EPBi/ESC related controller 111 is used for controlling the actions of the left caliper 109 and the right caliper 110 through the first relay module 102 and the second relay module 103, respectively. The left caliper 109 and the right caliper 110 embrace the wheel hub of the vehicle and produce brake control.

The pre-driver module 104 is connected to the first relay module 102 and the second relay module 103 through a first H-bridge module 105 and a second H-bridge module 106, respectively. The pre-drive module 104 is electrically connected with the main control MCU module 101. The pre-driver module 104 receives an instruction from the main control MCU module 101 to control the first H-bridge module 105 and the second H-bridge module 106. The pre-driver module 104 activates the first and

second relay modules

102 and 103 via the first and second H-

bridge modules

105 and 106, respectively, to actuate the left and

right calipers

109 and 110.

Preferably, the electronic parking control system 100 further includes a CAN communication module 112. The CAN communication module 112 is connected to an external complete vehicle VCU107 through a connector, that is, the main control MCU module 101 maintains communication with the complete vehicle VCU107 of the vehicle through the CAN communication module 112.

Preferably, the electronic parking control system 100 further includes a power module 113. The power module 113 is connected to the external battery 108 through a connector. The power supply module 113 supplies power to the main control MCU module 101, the first relay module 102, the second relay module 103, the pre-driver module 104, the first H-bridge module 105, and the second H-bridge module 106. Preferably, the power supply module 113 provides a power supply voltage of 3.3V to the master MCU module 101.

Preferably, the EPB/EPBi/ESC related controller 111 and the MGU motor of the left caliper 109 are connected to the normally closed contacts of the first relay module 102. The MGU motor of the EPB/EPBi/ESC related controller 111 and the right caliper 110 are connected to the normally closed contacts of the second relay module 103. Under the conventional condition, the EPB/EPBi/ESC related controller 111 receives a parking signal, and triggers the MGU motor of the left caliper 109 to operate through the normally closed contact of the first relay module 102, and simultaneously triggers the MGU motor of the right caliper 110 to operate through the normally closed contact of the second relay module 103, so that the left caliper 109 and the right caliper 110 are clamped, and the parking effect is achieved.

Preferably, the output contacts of the first relay module 102 are electrically connected to the MGU motor of the left caliper 109. The output contacts of the second relay module 103 are electrically connected with the MGU motor of the right caliper 110. More preferably, the first H-bridge module 105 is electrically connected to the normally open contacts of the first relay module 102, and the second H-bridge module 106 is electrically connected to the normally open contacts of the second relay module 103. After receiving a parking signal sent by a complete vehicle VCU107, the main control MCU module 101 instructs the first relay module 102 and the second relay module 103 to be switched from a normally closed contact to a normally open contact. The main control MCU module 101 then controls the first H-bridge module 105 and the second H-bridge module 106 through the pre-driver module 104, and then controls the left caliper 109 and the right caliper 110 to move through the normally open contacts of the first relay module 102 and the second relay module 103, so that the left caliper 109 and the right caliper 110 are clamped tightly, thereby achieving the parking effect.

Preferably, the VCU107 and the EPB/EPBi/ESC controller 111 are in communication for transmitting a park signal.

The invention also discloses an electronic parking control method. This control method is applied to the aforementioned electronic parking control system 100. In the vehicle normal mode, the EPB/EPBi/ESC related controller 111 receives the parking signal and controls the left caliper 109 and the right caliper 110 to operate through the first relay module 102 and the second relay module 103. In fact, in the normal mode of the entire vehicle, the main control MCU module 101 is in a sleep state. The EPB/EPBi/ESC related controller 111 triggers the MGU motor of the left caliper 109 and the MGU motor of the right caliper 110 to operate through the normally closed contacts of the first relay module 102 and the second relay module 103, respectively, so that the left caliper 109 and the right caliper 110 are clamped, and the parking effect is achieved.

And when the EPB/EPBi/ESC related controller 111 fails, the parking function is lost. The main control MCU module 101 enters a working state, and the main control MCU module 101 receives a parking signal sent by a whole vehicle VCU 107. The main control MCU module 101 instructs the first relay module 102 and the second relay module 103 to toggle from the normally closed contact to the normally open contact. The pre-driver module 104 receives an instruction of the main control MCU module 101 to control the first H-bridge module 105 and the second H-bridge module 106, and then controls the left caliper 109 and the right caliper 110 to operate through the first relay module 102 and the second relay module 103, respectively.

The electronic parking control system provided by the invention has the advantages that on the premise of not needing any change of an EPB/EPBi/ESC related controller, when the brake parking controller fails, the electronic parking control system receives a signal sent by a VCU of the whole vehicle to carry out parking control, the vehicle can be made to be static on a slope of 30%, compared with a P-gear lock, the electronic parking control system is safer, compared with other schemes, the electronic parking control system has the advantages of low cost, simple line structure and the like.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. An electronic parking control system for an automobile, the automobile comprising a VCU, a battery, a left caliper, a right caliper and an EPB/EPBi/ESC related controller, the electronic parking control system comprising:

2. The electronic parking control system of claim 1, further comprising a CAN communication module, wherein the master MCU module is in communication with the vehicle VCU of the vehicle through the CAN communication module.

3. The electronic parking control system of claim 1, further comprising a power module connected to the battery, the power module supplying power to the main control MCU module, the first relay module, the second relay module, the pre-driver module, the first H-bridge module, and the second H-bridge module.

4. The electronic parking control system of claim 3, wherein the power supply module provides a supply voltage of 3.3V to the master MCU module.

5. The electronic parking control system of claim 1, wherein the EPB/EPBi/ESC related controller and the MGU motor of the left caliper are connected to the normally closed contacts of the first relay module; the EPB/EPBi/ESC related controller and the MGU motor of the right caliper are connected to the normally closed contacts of the second relay module.

6. The electronic parking control system as claimed in claim 5, wherein the output contact of the first relay module is electrically connected with the MGU motor of the left caliper, and the output contact of the second relay module is electrically connected with the MGU motor of the right caliper.

7. The electronic parking control system of claim 1, wherein the first H-bridge module is electrically connected with the normally open contacts of the first relay module, and the second H-bridge module is electrically connected with the normally open contacts of the second relay module.

8. The electronic parking control system of claim 1 wherein the full vehicle VCU and EPB/EPBi/ESC associated controllers communicate for transmitting a parking signal.

9. An electronic parking control method is characterized in that the electronic parking control system of any one of claims 1 to 8 is applied, and in a normal mode of a whole vehicle, the EPB/EPBi/ESC related controller receives a parking signal and controls the left caliper and the right caliper to act through the first relay module and the second relay module; when the EPB/EPBi/ESC related controller fails, the main control MCU module receives a parking signal sent by the VCU of the whole vehicle, the pre-drive module receives an instruction of the main control MCU module to control the first H-bridge module and the second H-bridge module, and then the first relay module and the second relay module respectively control the left caliper and the right caliper to act.