Redundant parking EPB control device and vehicle

Abstract

The utility model relates to the technical field of vehicles, in particular to a redundant parking EPB control device and a vehicle, the device comprises an EPB switch, a first control assembly, a second control assembly and a brake assembly, the first control assembly is connected with the brake assembly and the EPB switch, and the second control assembly is connected with the EPB switch. The first control assembly controls the brake assembly to execute a brake action based on a brake signal of the EPB switch; and the second control assembly is connected with the EPB switch, the first control assembly and the brake assembly, and when the second control assembly judges that the first control assembly is in a fault state according to the brake signal and the caliper state signal, the second control assembly controls the brake assembly to execute a brake action or controls the brake assembly to relieve brake according to the accelerator opening degree and the vehicle state signal. Therefore, backup parking after an internal circuit of the electric control unit fails can be provided, backup parking after an external circuit power supply line of the electric control unit fails can also be provided, and the electric control unit is easy and convenient to apply to a whole vehicle and low in cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a control device of a redundant parking EPB and a vehicle. BACKGROUND

[0002] A national standard for a technical requirement and test method of a brake system of a passenger vehicle stipulates that when a damage occurs in an external circuit of an electric control unit other than a power supply circuit in an electric control unit or a control device fails, parking brake can still be performed from a driving position and a full load vehicle can be kept stationary on an 8% upward and downward slope. When the driver starts the vehicle again, the parking brake should be automatically released immediately, and the performance can be achieved through an engine / manual transmission or an automatic transmission (parking gear) or with the assistance thereof, and if necessary, the parking brake can be released by using a vehicle tool and auxiliary equipment.

[0003] A mechanical P gear on a main reducer is generally canceled on a pure electric type electric vehicle, so backup parking cannot be achieved through the mechanical P gear when an internal circuit of the electric control unit fails. In view of this situation, the brake electric control unit applies a redundant parking EPB technology: an auxiliary chip is added in the brake electric control unit, and when a main chip of the brake electric control unit fails, the parking is controlled by the auxiliary chip to meet the backup parking required by the regulations, as shown in Figure 1

[0004] However, the redundant parking EPB meets the regulations, but also has certain limitations, only supports backup parking after the internal circuit of the brake electric control unit fails, cannot support backup parking of the external circuit (power supply circuit) of the brake electric control unit, and requires technical development work in vehicle diagnosis and rewriting of software in the auxiliary chip, and cost increase caused by the auxiliary chip. SUMMARY

[0005] The present application provides a control device of a redundant parking EPB and a vehicle to solve the problems in the prior art that the redundant parking EPB only supports backup parking after the internal circuit of the brake electric control unit fails, cannot support backup parking of the external circuit (power supply circuit) of the brake electric control unit, and requires technical development work in vehicle diagnosis and rewriting of software in the auxiliary chip, and cost increase caused by the auxiliary chip.

[0006] ​The first aspect embodiment of the application provides a control device for a redundant EPB, comprising: an EPB switch, a first control component, a second control component and a brake component, wherein the first control component is connected with the brake component and the EPB switch respectively, the first control component controls the brake component to perform a braking action based on a brake signal of the EPB switch; the second control component is connected with the EPB switch, the first control component and the brake component respectively, when the first control component is in a fault state according to the brake signal and a caliper state signal, the second control component controls the brake component to perform a braking action or controls the brake component to release the brake according to an accelerator opening degree and a vehicle state signal.

[0007] Optionally, the second control component comprises: a control unit for receiving the brake signal, the caliper state signal, the accelerator opening degree and the vehicle state signal, the control unit is connected with the EPB switch and the first control component respectively, the control unit generates a clamping signal or a release signal according to the brake signal when the caliper state signal is missing, or generates a release signal when the brake signal and the caliper state signal are both missing, and the accelerator opening degree is greater than a preset opening degree and the vehicle state signal is a stationary state; a first switch connected with the control unit, the first switch controls the brake component to perform a braking action based on the clamping signal; a second switch connected with the control unit, the second switch controls the brake component to release the brake based on the release signal.

[0008] Optionally, the first switch and the second switch are both relays.

[0009] Optionally, the control device for the redundant EPB further comprises: an alarm component connected with the control unit, the alarm component alarms and reminds when the second control component determines that the first control component is in a fault state according to the brake signal and the caliper state signal.

[0010] Optionally, the alarm component comprises: an acoustic alarm unit connected with the control unit, the acoustic alarm unit alarms and reminds acoustically when the second control component determines that the first control component is in a fault state according to the brake signal and the caliper state signal; and / or an optical alarm unit connected with the control unit, the optical alarm unit alarms and reminds optically when the second control component determines that the first control component is in a fault state according to the brake signal and the caliper state signal.

[0011] Optionally, a display component is connected to the control unit, and the display component displays the failure state information of the first control component.

[0012] Optionally, the control device of the redundant EPB further comprises a communication component connected to the second control component, and the communication component transmits the control unit of the brake signal, the caliper state signal, the throttle opening and the vehicle state signal to the second control component when the first control component is in the failure state.

[0013] Optionally, the control device of the redundant EPB further comprises a power supply component connected to the first control component and the second control component, and the power supply component supplies power to the first control component and the second control component.

[0014] Optionally, the power supply component comprises a first power supply and a second power supply, and the first power supply and the second power supply are connected to the first control component and the second control component, and the second power supply supplies power to the first control component and the second control component when the first power supply is in the failure state.

[0015] The second aspect embodiment of the application provides a vehicle comprising the control device of the redundant EPB.

[0016] In the above embodiment, the EPB switch, the first control component, the second control component and the brake component are included, the first control component is connected to the brake component and the EPB switch, the first control component controls the brake component to perform the brake action based on the brake signal of the EPB switch, the second control component is connected to the EPB switch, the first control component and the brake component, and the second control component controls the brake component to perform the brake action or controls the brake component to release the brake according to the throttle opening and the vehicle state signal when the first control component is in the failure state according to the brake signal and the caliper state signal. Thus, the problems in the prior art that the redundant EPB only supports the backup parking after the internal circuit of the brake electronic control unit fails, cannot support the backup brake after the external circuit power supply line of the brake electronic control unit fails, and needs to increase the software in the auxiliary chip for the technical development work of the vehicle diagnosis writing, and the cost increase caused by the auxiliary chip are solved. Not only the backup parking after the internal circuit of the electronic control unit fails can be provided, but also the backup parking after the external circuit power supply line of the electronic control unit fails can be provided, and the application is simple and convenient in vehicle application, and the cost is low.

[0017] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings of exemplary embodiments of the present application, wherein:

[0019] Figure 1 An example diagram of a control device for a redundant parking EPB in the related art;

[0020] Figure 2 A block diagram of a control device for a redundant parking EPB according to an embodiment of the present application;

[0021] Figure 3 A diagram of a control device for a redundant parking EPB according to an embodiment of the present application;

[0022] Figure 4 A flow diagram of a control method for a redundant parking EPB according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] Embodiments of the present application are described in detail below with reference to the attached drawings. The embodiments of the present application described below are examples and are intended to explain the present application, and are not to be understood as limiting the present application.

[0024] The following describes a control device and vehicle for a redundant parking EPB according to an embodiment of the present application with reference to the accompanying drawings. In response to the prior art redundant parking EPB mentioned in the background art, which only supports backup parking after a failure of the internal circuit of the brake electronic control unit (EBCU), but cannot support backup braking after a failure of the external circuit power supply line of the brake electronic control unit (EBCU), and requires additional technical development work for flashing software in the auxiliary chip for vehicle diagnostics, which increases the cost of the auxiliary chip, the present application provides a control device for a redundant parking EPB. The device includes an EPB switch, a first control component, a second control component, and a brake component. The first control component is connected to the brake component and the EPB switch, respectively. The first control component controls the brake component to perform a braking action based on a brake signal from the EPB switch. The second control component is connected to the EPB switch, the first control component, and the brake component, respectively. When the second control component determines that the first control component is in a fault state based on the brake signal and the caliper status signal, the second control component controls the brake component to perform a braking action or controls the brake component to release the brake based on the throttle opening and the vehicle status signal. This solves the problems in the existing technology that the redundant parking EPB only supports backup parking after the failure of the internal circuit of the brake electronic control unit, cannot support backup braking when the power supply line of the external circuit of the brake electronic control unit fails, and requires additional technical development work on the software in the auxiliary chip in terms of vehicle diagnosis flashing, and the cost increase caused by the addition of auxiliary chips. It can not only provide backup parking after the failure of the internal circuit of the electronic control unit, but also provide backup parking after the failure of the power supply line of the external circuit of the electronic control unit, and is relatively simple to apply in the whole vehicle and has a low cost.

[0025] Specifically, Figure 2 A block diagram of a control device for a redundant parking EPB provided in an embodiment of the present application.

[0026] like Figure 2 As shown, the control device 10 of the redundant parking EPB includes: an EPB switch 100 , a first control component 200 , a second control component 300 and a brake component 400 .

[0027] Among them, the first control component 200 is respectively connected to the brake component 400 and the EPB switch 100, and the first control component 200 controls the brake component to perform a braking action based on the brake signal of the EPB switch 100; the second control component 200 is respectively connected to the EPB switch 100, the first control component 200 and the brake component 400, and when the second control component 200 determines that the first control component 200 is in a fault state according to the brake signal and the caliper status signal, it controls the brake component 400 to perform a braking action or controls the brake component to release the brake according to the throttle opening and the vehicle status signal.

[0028] Optionally, in some embodiments, the second control component 300 comprises a control unit 301 for receiving the brake signal, the caliper state signal, the throttle opening and the vehicle state signal, a first switch 302 and a second switch 303. The control unit 301 is connected to the EPB switch 100 and the first control component 200 respectively. When the caliper state signal is absent, the control unit 301 generates a clamping signal or a release signal according to the brake signal, or when both the brake signal and the caliper state signal are absent, and the throttle opening is greater than a preset opening and the vehicle state signal is a stationary state, the control unit 301 generates a release signal. The first switch 302 is connected to the control unit 301, and the first switch 302 controls the brake component 400 to perform a braking action based on the clamping signal. The second switch 303 is connected to the control unit 301, and the second switch 302 controls the brake component 400 to release the brake based on the release signal.

[0029] In some embodiments, the first switch 302 and the second switch 303 are both relays.

[0030] As shown in Figure 3 , the EPB switch 100 is used to send a brake signal, the first control component 200 is a brake electronic control unit in Figure 3 , the second control component 300 comprises a control unit 301, a first switch 302 and a second switch 303, the control unit 301 is another controller of the whole vehicle in Figure 3 , the first switch 302 is a relay A in Figure 3 , and the second switch 303 is a relay B in Figure 3 , and the brake component 400 is a caliper for sending a caliper state signal.

[0031] It should be understood that the second control component 200 determines whether the first control component 200 is in a fault state according to the brake signal and the caliper state signal, and controls the caliper to clamp or release according to the throttle opening and the vehicle state signal when the first control component 200 is in a fault state.

[0032] Specifically, when the caliper state signal is absent, the control unit 301 generates a clamping signal or a release signal according to the brake signal, the first switch 302 controls the brake component 400 to perform a braking action based on the clamping signal, or the second switch 303 controls the brake component 400 to release the brake based on the release signal; when both the brake signal and the caliper state signal are absent, and the throttle opening is greater than a preset opening and the vehicle state signal is a stationary state, the control unit 301 generates a release signal, and the second switch 303 controls the brake component 400 to release the brake based on the release signal; when both the brake signal and the caliper state signal are absent, and the throttle opening is less than a preset opening and the vehicle state signal is a stationary state, the control unit 301 generates a clamping signal, and the first switch 302 controls the brake component 400 to perform a braking action based on the clamping signal.

[0033] Optionally, in some embodiments, the control device 10 of the redundant EPB described above further comprises: an alarm component connected to the control unit 301, the alarm component alarms when the second control component 300 determines that the first control component 200 is in a fault state according to the brake signal and the caliper state signal.

[0034] Optionally, in some embodiments, the alarm component comprises: an acoustic alarm unit and / or an optical alarm unit. The acoustic alarm unit is connected to the control unit, and the acoustic alarm unit alarms when the second control component 300 determines that the first control component 200 is in a fault state according to the brake signal and the caliper state signal; the optical alarm unit is connected to the control unit, and the optical alarm unit alarms when the second control component 300 determines that the first control component 200 is in a fault state according to the brake signal and the caliper state signal.

[0035] Optionally, in some embodiments, the display component is connected to the control unit 301, and the display component displays the fault state information of the first control component 200.

[0036] The acoustic alarm unit can be a speaker of the vehicle, the optical alarm unit can be a display screen of the vehicle, and the display component can be a large screen of a cloud platform or a remote monitoring center. The fault state information of the first control component 200 is sent to the large screen of the cloud platform or the remote monitoring center, so that the management personnel or the maintenance personnel can access and view the fault state information of the vehicle in real time at any location through the network.

[0037] It can be understood that when the second control component 300 determines that the first control component 200 is in a fault state, the acoustic alarm unit and / or the optical alarm unit of the alarm component alarms to remind the user to repair, and the display component sends the fault state information of the first control component 200 to the preset analysis terminal for the maintenance personnel to repair the vehicle.

[0038] Optionally, in some embodiments, the control device 10 of the redundant EPB described above further comprises: a communication component connected to the second control component 300, the communication component transmits the control unit of the brake signal, the caliper state signal, the throttle opening and the vehicle state signal to the second control component 300 when the first control component 200 is in a fault state.

[0039] Optionally, in some embodiments, the control device 10 of the redundant EPB described above further comprises: a power supply component 500 connected to the first control component 200 and the second control component 300, respectively, and the power supply component 500 supplies power to the first control component 200 and the second control component 300.

[0040] Optionally, in some embodiments, the power supply assembly 500 comprises: a first power supply and a second power supply, the first power supply and the second power supply are connected with the first control assembly 200 and the second control assembly 300, and the second power supply supplies power for the first control assembly 200 and the second control assembly 300 when the first power supply is in a failure state.

[0041] It can be understood that the power supply assembly 500 comprises the first power supply and the second power supply, and the second power supply supplies power for the first control assembly 200 and the second control assembly 300 when the first power supply is in a failure state.

[0042] Since the auxiliary chip is not contained in the brake control unit, when the main chip functions normally, the main chip can realize the clamping and releasing of the caliper according to the input of the EPB switch instruction to realize the clamping and releasing of the caliper, when the main chip in the brake control unit fails, no matter how the EPB switch instruction is input, the caliper cannot realize the clamping and releasing, the vehicle cannot be parked, and the regulation requirements are not met.

[0043] Therefore, the control device of the redundant parking EPB described in the embodiments of the present application can realize the parking of the vehicle or prompt the driver through the software control logic integrated in the other controller of the vehicle to operate the relay A (clamping) or the relay B (releasing) when the brake control unit, the EPB switch, the external line connecting the storage battery and the brake control unit, the external line connecting the EPB switch and the brake control unit, and the external line connecting the brake control unit and the caliper fail, thereby meeting the regulation requirements. In order to meet the regulation requirement that the backup brake makes the fully loaded vehicle remain stationary on an 8% uphill or downhill slope, the power-on duration of the relay needs to be calibrated in the vehicle. The control device can replace the redundant parking EPB, avoid the cost increase, communication diagnosis development, and maintenance work caused by the addition of the auxiliary chip in the brake control unit, and can also be used in the case where the brake control unit cannot add the auxiliary chip due to hardware limitations.

[0044] The software control logic flowchart integrated in the other controller of the vehicle is shown in Figure 4

[0045] ① When the caliper state signal and the EPB switch instruction signal (i.e. the braking signal in the above) are normal and consistent, it indicates that the main chip of the brake control unit can work normally, and at this time, the second control assembly 300 does not act.

[0046] ② When the EPB switch instruction signal is normal, but the caliper state signal cannot be received, it indicates that the main chip of the brake control unit has failed, at this time, the second control assembly 300 connects the relay A or the relay B according to the EPB switch instruction signal to realize the backup clamping or releasing, and controls the acoustic alarm unit and / or the optical alarm unit to prompt the driver that the brake control unit has failed, and reminds the driver to repair as soon as possible. ​

[0047] ③When the EPB switch instruction signal is normal, and the caliper status signal can also be received, but the caliper status signal is inconsistent with the EPB switch instruction signal, it indicates that the main chip of the brake control unit is valid, the caliper is invalid or the external line connected between the brake control unit and the caliper is invalid. At this time, the second control assembly 300 does not act, and the acoustic alarm unit and / or the optical alarm unit controlled by the brake control unit prompts the driver that the parking failure, reminding the driver to repair the caliper and its connecting line as soon as possible.

[0048] ④When the EPB switch instruction signal is abnormal or cannot be received, but the caliper status signal is normal, it indicates that the EPB switch or the external line connected between the EPB switch and the brake control unit is invalid. At this time, the second control assembly 300 does not act, and the brake control unit uses the P gear linkage function to realize the caliper clamping / release by cutting into / out of P gear, and the acoustic alarm unit and / or the optical alarm unit controlled by the brake control unit prompts the driver that the parking switch is abnormal.

[0049] ⑤When the EPB switch instruction signal is abnormal or cannot be received and the caliper status signal also cannot be received, it indicates that the main chip of the brake control unit has failed, but at this time the second control assembly 300 cannot directly output the clamping / release caliper because it cannot know the intention of the driver. Further judgment is needed to determine whether the vehicle is stationary. If the vehicle is not stationary, the second control assembly 300 does not act and waits until the vehicle is stationary before further judgment. If the vehicle is stationary and the throttle opening is ≥X (X is a pre-set calibration value), the second control assembly 300 connects the relay B to release the caliper, which is convenient for the driver to move the vehicle for repair. If the vehicle is stationary and the throttle opening is <X, the second control assembly 300 connects the relay A to clamp the caliper to maintain the parking clamping state, avoiding the danger caused by the movement of the vehicle.

[0050] The control device of the redundant EPB according to the embodiments of the present application comprises an EPB switch, a first control component, a second control component and a brake component, the first control component is connected with the brake component and the EPB switch respectively, the first control component controls the brake component to perform a braking action based on a brake signal of the EPB switch, the second control component is connected with the EPB switch, the first control component and the brake component respectively, when the first control component is in a fault state according to a brake signal and a caliper state signal, the second control component controls the brake component to perform a braking action or controls the brake component to release the braking according to a throttle opening degree and a vehicle state signal. Thus, the problems in the prior art that the redundant EPB only supports backup parking after the internal circuit of the brake control unit fails, cannot support backup braking after the external circuit power supply line of the brake control unit fails, and needs to increase the software in the auxiliary chip in the technical development work of vehicle diagnosis writing, and the cost increase caused by the auxiliary chip are solved. The control device of the redundant EPB not only can provide backup parking after the internal circuit of the brake control unit fails, but also can provide backup parking after the external circuit power supply line of the brake control unit fails, and is relatively simple and low in cost in vehicle application.

[0051] The embodiments of the present application also provide a vehicle comprising the control device of the redundant EPB.

[0052] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0053] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "N" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0054] It should be understood that portions of the application can be implemented in hardware, software, firmware, or combinations thereof. In the above embodiments, the N steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As such, in hardware implementations and in another embodiment, any of the following technologies, or combinations thereof, can be used: discrete logic circuitry having logic gates for implementing logic functions upon an application of data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), and the like.

Claims

1. A control device for a redundant parking EPB, characterized in that: include: EPB switch, first control assembly, second control assembly and brake assembly, wherein, The first control component is connected to the brake component and the EPB switch respectively, and the first control component controls the brake component to perform a braking action based on a brake signal from the EPB switch; The second control component is respectively connected to the EPB switch, the first control component and the brake component. When the second control component determines that the first control component is in a fault state based on the brake signal and the caliper status signal, the second control component controls the brake component to perform a braking action or controls the brake component to release the brake based on the throttle opening and the vehicle status signal.

2. The control device for the redundant parking EPB according to claim 1, characterized in that: The second control component includes: a control unit for receiving the brake signal, the caliper status signal, the throttle opening, and the vehicle status signal, the control unit being connected to the EPB switch and the first control assembly, respectively, the control unit generating a clamping signal or a release signal based on the brake signal when the caliper status signal is absent, or generating a release signal when both the brake signal and the caliper status signal are absent, the throttle opening is greater than a preset opening, and the vehicle status signal indicates a stationary state; a first switch connected to the control unit, the first switch controlling the brake assembly to perform a braking action based on the clamping signal; A second switch is connected to the control unit, and the second switch controls the brake assembly to release the brake based on the release signal.

3. The control device for the redundant parking EPB according to claim 2, characterized in that: The first switch and the second switch are both relays.

4. The control device for the redundant parking EPB according to claim 2, characterized in that: Also includes: An alarm component is connected to the control unit, and the alarm component issues an alarm reminder when the second control component determines that the first control component is in a fault state based on the brake signal and the caliper status signal.

5. The control device for the redundant parking EPB according to claim 4, characterized in that: The alarm component includes: an acoustic alarm unit connected to the control unit, and configured to generate an acoustic alarm when the second control component determines that the first control component is in a fault state based on the brake signal and the caliper status signal; And / or, an optical alarm unit, which is connected to the control unit, and provides an optical alarm reminder when the second control component determines that the first control component is in a fault state based on the brake signal and the caliper status signal.

6. The control device for the redundant parking EPB according to claim 2, characterized in that: Also includes: A display component is connected to the control unit, and the display component displays the fault status information of the first control component.

7. The control device for the redundant parking EPB according to claim 2, characterized in that: Also includes: A communication component is connected to the second control component, and the communication component transmits the brake signal, the caliper status signal, the throttle opening and the vehicle status signal to the control unit of the second control component when the first control component is in a fault state.

8. The control device for redundant parking EPB according to claim 1, characterized in that: Also includes: A power supply component is connected to the first control component and the second control component respectively, and the power supply component supplies power to the first control component and the second control component.

9. The control device for the redundant parking EPB according to claim 8, characterized in that: The power supply component includes: A first power supply and a second power supply, wherein the first power supply and the second power supply are both connected to the first control component and the second control component, and the second power supply supplies power to the first control component and the second control component when the first power supply is in a fault state.

10. A vehicle, characterized in that: include: A control device for a redundant parking EPB as claimed in any one of claims 1 to 9.

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