CN112572389A - EPB emergency backup control system and control method - Google Patents
EPB emergency backup control system and control method Download PDFInfo
- Publication number
- CN112572389A CN112572389A CN202011411993.3A CN202011411993A CN112572389A CN 112572389 A CN112572389 A CN 112572389A CN 202011411993 A CN202011411993 A CN 202011411993A CN 112572389 A CN112572389 A CN 112572389A
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- epb
- control unit
- vehicle
- caliper
- emergency
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Human Computer Interaction (AREA)
- Regulating Braking Force (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention relates to an EPB emergency backup control system and a control method, wherein the control system comprises a vehicle control unit, a vehicle body stability control unit, an EPB control switch, an electronic gear shifter, an instrument and a parking actuator, and is characterized in that a caliper clamping state signal output end of the vehicle body stability control unit is connected with a signal input end of the vehicle control unit, an emergency backup braking request signal output end of the vehicle control unit is connected with a signal input end of the parking actuator, and an instrument reminding information output end of the vehicle control unit is connected with a signal input end of the instrument. The control method comprises the following steps: when EPB active parking is carried out, if the VCU monitors that the left caliper and the right caliper are not clamped simultaneously, the VCU immediately carries out instrument reminding to a driver to pull the EPB switch or the P-gear switch for a long time, enters an EPB emergency backup control state and confirms the caliper state again, and if the left caliper and the right caliper are not clamped simultaneously, the VCU carries out clamping control on the unilateral caliper, the parking success is ensured, and the requirement on the slope parking performance is met. The invention has low cost and great benefit.
Description
Technical Field
The invention relates to parking, in particular to an EPB emergency backup control system and a control method.
Background
With the development of automobile technology, more and more new energy vehicle types tend to cancel a P gear locking mechanism, and in order to meet the braking and parking performance regulation requirements, a braking backup control system is required on vehicle types which are provided with an EPB electronic parking braking system and simultaneously cancel the P gear locking mechanism. When the EPB control system fails, the brake backup control system ensures that the whole vehicle can still meet the parking requirement of 8 percent of full load.
The technical scheme is that an independent EPB dual-redundancy controller is adopted, the controller is a dual-power supply control system, a dual-path CAN network is adopted, control loops of motors of left and right calipers are completely independent, mutual backup control is achieved, namely one path of caliper control fails, the other path of caliper control is relatively independent, the other path of caliper CAN be controlled, and the backup control is achieved so that the requirement of parking performance is met. However, from the development of the technical route of the ESC and the related EPB control requirements of the ADAS function of the whole vehicle, the ESC is integrated with the EPB control function, and the independent EPB dual redundant controller is adopted, so that the ESC is not integrated with the EPB function, and thus the technical scheme has limitations in vehicle application.
The other technical scheme is that a brake electric booster system is adopted, an EPB control function is required to be integrated in an ESC control system for a vehicle type with an ADAS L2 level function, the brake electric booster system is adopted at present, the brake performance is provided, the automatic driving requirement is met, and meanwhile backup control can be carried out on braking. However, many vehicles are not equipped with a brake electric booster for reasons of functional configuration and cost.
In view of the above-mentioned deficiencies of the prior art, the present invention provides an EPB emergency backup control system and method. By adopting the invention, the problem of brake backup control of a vehicle type without a P-gear executing mechanism can be effectively solved.
Disclosure of Invention
The invention aims to provide an EPB emergency backup control system and a control method.
In order to achieve the purpose, the invention provides an EPB emergency backup control system, which comprises a vehicle control unit, a vehicle body stability control unit, an EPB control switch, an electronic gear shifter, an instrument and a parking actuator, wherein a P gear switch signal output end of the electronic gear shifter is connected with a signal input end of the vehicle control unit, a parking request signal output end of the EPB control switch is connected with a signal input end of the vehicle body stability control unit, a caliper control request signal output end of the vehicle body stability control unit is connected with a signal input end of the parking actuator, the vehicle-mounted parking brake system is characterized in that a caliper clamping state signal output end of a vehicle body stability control unit is connected with a signal input end of a vehicle controller, an emergency backup brake request signal output end of the vehicle controller is connected with a signal input end of a parking actuator, and an instrument reminding information output end of the vehicle controller is connected with a signal input end of an instrument.
Further, the instrument reminding information comprises an audible and visual alarm signal.
The invention also provides a control method for carrying out EPB emergency backup by using one of the devices: during the parking, the driver requests or does not request EPB parking according to the vehicle speed at that time.
Further, when the vehicle speed is less than 2km/h, the driver actively operates the EPB control switch to request EPB parking.
Further, when the vehicle speed is less than 2km/h, the driver actively operates the electronic shifter to request EPB parking.
Further, when the vehicle control unit receives a signal that the left caliper and the right caliper of the vehicle body stability control unit are simultaneously in an unclamped state, the vehicle control unit sends an instrument reminding signal to remind a driver of pressing and operating an EPB control switch for a long time, and an emergency EPB backup control function of the vehicle control unit is activated.
Further, after the emergency EPB backup control function is activated, the vehicle control unit waits for 3S-5S to detect the states of the left caliper and the right caliper again, if the left caliper and the right caliper are still in an unclamped state at the same time, the vehicle control unit executes emergency braking, and the instrument is reminded to enter the EPB emergency braking state.
Further, when the vehicle control unit receives a signal that the left caliper and the right caliper of the vehicle body stability control unit are simultaneously in an unclamped state, the vehicle control unit sends an instrument reminding signal to remind a driver of pressing the electronic gear shifter for a long time, and an emergency EPB backup control function of the vehicle control unit is activated.
Further, after the emergency EPB backup control function is activated, the vehicle control unit waits for 3S-5S to detect the states of the left caliper and the right caliper again, if the left caliper and the right caliper are still in an unclamped state at the same time, the vehicle control unit executes emergency braking, and the instrument is reminded to enter the EPB emergency braking state.
The invention is suitable for the vehicle model without the P-gear executing mechanism.
By adopting the invention, when a driver carries out EPB active parking, if the VCU monitors that the left and right calipers are simultaneously in an unclamped state, the VCU immediately carries out instrument reminding on the driver to pull the EPB switch or the P-gear switch for a long time, enters an EPB emergency backup control state, and confirms the clamping state of the left and right calipers again, if the EPB emergency backup control state is not clamped simultaneously, the VCU carries out clamping control on the unilateral calipers, the successful parking is ensured, the requirement of the slope parking performance is met, and the problem of brake backup control of a vehicle type with a P-gear executing mechanism is effectively solved.
The invention has the advantages of low cost of the added parts and objects and realization of the maximum benefit of canceling the P-gear mechanism.
Drawings
FIG. 1 is a schematic diagram of the control system architecture of the present invention;
fig. 2 is a flow chart of the control method of the present invention.
In the figure: 1-a vehicle control unit; 2-a vehicle body stability control unit; 3-EPB control switch; 4-an electronic gear shifter; 5-instrument; 6-parking actuator.
Detailed Description
The invention is further described below with reference to the following figures and examples, which should not be construed as limiting the invention.
The shown EPB emergency backup control system comprises a vehicle control unit 1, a vehicle body stability control unit 2 and an EPB control switch 3, the electronic gear shifter comprises an electronic gear shifter 4, an instrument 5 and a parking actuator 6, wherein a P-gear switch signal output end of the electronic gear shifter 4 is connected with a signal input end of a whole vehicle controller 1, a parking request signal output end of an EPB control switch 3 is connected with a signal input end of a vehicle body stable control unit 2, a caliper control request signal output end of the vehicle body stable control unit 2 is connected with a signal input end of the parking actuator 6, a caliper clamping state signal output end of the vehicle body stable control unit 2 is connected with a signal input end of the whole vehicle controller 1, an emergency backup braking request signal output end of the whole vehicle controller 1 is connected with a signal input end of the parking actuator 6, and an instrument reminding information output end of the whole vehicle controller 1 is connected with.
The preferred embodiments are: in the above scheme, the instrument reminding information includes an audible and visual alarm signal.
The control method for EPB emergency backup by using one of the devices comprises the following steps: during the parking, the driver requests or does not request EPB parking according to the vehicle speed at that time.
The preferred embodiments are: in the above-described aspect, when the vehicle speed is less than 2km/h, the driver actively operates the EPB control switch 3 to request EPB parking.
The preferred embodiments are: in the above-described scheme, when the vehicle speed is less than 2km/h, the driver actively operates the electronic shifter 4 to request EPB parking.
The preferred embodiments are: in the above scheme, when the vehicle control unit 1 receives a signal that the left caliper and the right caliper of the vehicle body stability control unit 2 are simultaneously in an unclamped state, the vehicle control unit 1 sends an instrument reminding signal to remind a driver to operate the EPB control switch 3 for a long time, so that an emergency EPB backup control function of the vehicle control unit 1 is activated.
The preferred embodiments are: in the scheme, after the emergency EPB backup control function is activated, the vehicle control unit 1 waits for 3S-5S, the states of the left caliper and the right caliper are detected again, if the left caliper and the right caliper are still in the unclamped state at the same time, the vehicle control unit 1 executes emergency braking, and the HMI is reminded to enter the EPB emergency braking state.
The preferred embodiments are: in the above scheme, when the vehicle control unit 1 receives a signal that the left caliper and the right caliper of the vehicle body stability control unit 2 are simultaneously in an unclamped state, the vehicle control unit 1 sends an instrument reminding signal to remind a driver to operate the electronic gear shifter 4 for a long time, so that an emergency EPB backup control function of the vehicle control unit 1 is activated.
The preferred embodiments are: in the scheme, after the emergency EPB backup control function is activated, the vehicle control unit 1 waits for 3S-5S, the states of the left caliper and the right caliper are detected again, if the left caliper and the right caliper are still in the unclamped state at the same time, the vehicle control unit 1 executes emergency braking, and the HMI is reminded to enter the EPB emergency braking state.
Those not described in detail in this specification are prior art to the knowledge of those skilled in the art.
Claims (9)
1. An EPB emergency backup control system comprising: vehicle control unit (1), automobile body stable control unit (2), EPB control switch (3), electron selector (4), instrument (5) and parking executor (6), the P of electron selector (4) keeps off switch signal output part and is connected with the signal input part of vehicle control unit (1), the parking request signal output part of EPB control switch (3) is connected with the signal input part of automobile body stable control unit (2), the calliper control request signal output part of automobile body stable control unit (2) is connected with the signal input part of parking executor (6), its characterized in that: the clamp clamping state signal output end of a clamp of the vehicle body stability control unit (2) is connected with the signal input end of the vehicle control unit (1), the emergency backup braking request signal output end of the vehicle control unit (1) is connected with the signal input end of the parking actuator (6), and the instrument reminding information output end of the vehicle control unit (1) is connected with the signal input end of the instrument (5).
2. The EPB emergency backup control system of claim 1, wherein: the instrument reminding information comprises an audible and visual alarm signal.
3. A control method for EPB emergency backup by using one of the control systems of claim 1 or 2, characterized in that: during the parking, the driver requests or does not request EPB parking according to the vehicle speed at that time.
4. The EPB emergency backup control method according to claim 3, wherein: when the vehicle speed is less than 2km/h, the driver actively operates an EPB control switch (3) to request EPB parking.
5. The EPB emergency backup control method according to claim 3, wherein: when the vehicle speed is less than 2km/h, the driver actively operates the electronic shifter (4) to request EPB parking.
6. The EPB emergency backup control method according to claim 4, wherein: when the vehicle control unit (1) receives a signal that the left caliper and the right caliper of the vehicle body stability control unit (2) are simultaneously in an unclamped state, the vehicle control unit (1) sends an instrument reminding signal to remind a driver to operate the EPB control switch (3) for a long time, and an emergency EPB backup control function of the vehicle control unit (1) is activated.
7. The EPB emergency backup control method according to claim 6, wherein: after the emergency EPB backup control function is activated, the vehicle control unit (1) waits for 3S-5S to detect the state of the left caliper and the right caliper again, if the left caliper and the right caliper are still in an unclamped state at the same time, the vehicle control unit (1) executes emergency braking, and the instrument is reminded to enter an EPB emergency braking state.
8. The EPB emergency backup control method according to claim 5, wherein: when the vehicle control unit (1) receives a signal that the left caliper and the right caliper of the vehicle body stability control unit (2) are simultaneously in an unclamped state, the vehicle control unit (1) sends an instrument reminding signal to remind a driver to operate the electronic gear shifter (4) for a long time, and an emergency EPB backup control function of the vehicle control unit (1) is activated.
9. The EPB emergency backup control method according to claim 8, wherein: after the emergency EPB backup control function is activated, the vehicle control unit (1) waits for 3S-5S to detect the state of the left caliper and the right caliper again, if the left caliper and the right caliper are still in an unclamped state at the same time, the vehicle control unit (1) executes emergency braking, and the instrument is reminded to enter an EPB emergency braking state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411993.3A CN112572389B (en) | 2020-12-04 | 2020-12-04 | EPB emergency backup control system and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011411993.3A CN112572389B (en) | 2020-12-04 | 2020-12-04 | EPB emergency backup control system and control method |
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| CN112572389A true CN112572389A (en) | 2021-03-30 |
| CN112572389B CN112572389B (en) | 2022-03-18 |
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Cited By (2)
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| CN113264026A (en) * | 2021-06-15 | 2021-08-17 | 东风汽车集团股份有限公司 | New energy automobile electron parking control system |
| CN115848328A (en) * | 2021-09-24 | 2023-03-28 | 重庆长安汽车股份有限公司 | Parking control system and method and vehicle |
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| CN115848328B (en) * | 2021-09-24 | 2024-04-19 | 重庆长安汽车股份有限公司 | Parking control system and method and vehicle |
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| CN112572389B (en) | 2022-03-18 |
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