CN112477836A - Brake system liquid feeding and exhausting control method based on electronic stability control system - Google Patents
Brake system liquid feeding and exhausting control method based on electronic stability control system Download PDFInfo
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- CN112477836A CN112477836A CN202011357583.5A CN202011357583A CN112477836A CN 112477836 A CN112477836 A CN 112477836A CN 202011357583 A CN202011357583 A CN 202011357583A CN 112477836 A CN112477836 A CN 112477836A
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- 239000007788 liquid Substances 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000009467 reduction Effects 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- 230000003993 interaction Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000002304 esc Anatomy 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Classifications
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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
- B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
- B60T17/222—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems by filling or bleeding of hydraulic systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S5/00—Servicing, maintaining, repairing, or refitting of vehicles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention provides a brake system liquid feeding and exhausting control method based on an electronic stability control system.A vehicle enters a brake liquid feeding and exhausting mode, the electronic stability control system monitors the pressure in an automobile brake loop and pressurizes the brake loop, the electronic stability control system monitors and judges whether to enter the exhausting mode, and the operation is repeated until the liquid feeding and exhausting of four loops are completed, so that the labor cost is reduced; the man-machine interaction device is not needed, the brake exhaust process is shorter in time, and the exhaust effect is better.
Description
Technical Field
The invention belongs to the technical field of automobile braking, and particularly relates to a brake system liquid feeding and exhausting control method based on an electronic stability control system.
Background
The hydraulic brake system is standard in passenger cars due to high sensitivity, quick response, safety and stability; however, since the transmission medium of the hydraulic brake system is liquid, the brake circuit must be isolated from the outside, and air cannot exist in the brake circuit, so that brake charging and exhausting are indispensable work in the after-sales maintenance and repair process of the brake system of the passenger vehicle.
The existing brake charging and exhausting work is generally completed by two persons in a matching way, one person steps on a brake pedal at a main driving position, and the other person performs brake exhausting at four wheel positions in sequence through loosening and tightening exhaust screws of a brake. The mode can be finished by at least two persons, and the labor is consumed; people at the main driving position need to repeatedly step on the brake pedal to discharge air to the exhaust screw of the brake, and the time and the labor are consumed.
The motor can also be used for driving the brake master cylinder to replace the manual work of stepping on the brake pedal at the cab position, and an operator can operate the brake master cylinder through the human-computer interaction device. However, because the conventional vehicle brake master cylinder has no motor, if the technical scheme needs to be implemented, the motor and the controller need to be additionally added (the technical scheme can be realized by the existing electronic booster on the market at present, but the electronic booster has high cost and cannot be popularized to all passenger vehicles in a short time); in addition, the technical scheme needs to use a human-computer interaction device, and for personnel who brake and exhaust at the wheel position, the personnel can exhaust air and operate the human-computer interaction device at the same time, but the personnel is more troublesome.
At present, many automobiles are provided with electronic stability control systems (ESC), which is an active safety technology for assisting drivers in controlling the automobiles, and is a further extension of the functions of anti-lock braking systems (ABS) and Traction Control Systems (TCS) of the automobiles, and is an integrated person of the current safety electronic equipment of the automobiles. How to utilize ESC to assist and carry out the liquid filling exhaust control of automobile braking system has very valuable research meaning.
Disclosure of Invention
The invention aims to solve the technical problems and provides a brake system liquid feeding and exhausting control method based on an electronic stability control system, which is time-saving and labor-saving and improves the exhausting efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows: the brake system liquid charging and exhausting control method based on the electronic stability control system is characterized by comprising the following steps of:
s1) an operator starts a vehicle, the vehicle enters a brake charging and exhausting mode through a vehicle-mounted computer, the pressure in a brake loop of the vehicle is monitored through an electronic stability control system, the brake loop is pressurized, whether the pressure in the loop reaches a threshold value a within a set time is judged, if yes, an indicator lamp is normally on, the operator exits the brake charging and exhausting mode, and the electronic stability control system releases the pressure and recovers the initial state; if not, continuing pressurizing the single loop;
s2) the electronic stability control system judges whether the pressure in the single loop does not rise any more in a certain time domain, if the pressure does not rise any more, the pressure continues to be increased, if the pressure does not rise any more, the pressure is maintained through the electronic stability control system, an indicator light flickers, and an operator releases a brake exhaust screw to perform brake exhaust;
s3) the pressure in the single loop is reduced along with the time, the electronic stability control system monitors the pressure in the loop, the indicator light is turned off, the electronic stability control system judges whether the reduction rate of the pressure in the loop in a certain time domain is lower than a threshold value b, if the reduction rate is lower than the threshold value b, the indicator light flickers, and an operator screws the exhaust screw; if the b is higher than the b, continuing to perform braking and exhausting;
s4) after the exhaust screw is screwed down, the electronic stability control system judges whether the pressure in the single loop does not drop any more within a certain time domain, if the pressure does not drop any more, the indicator lamp is turned off, and the electronic stability control system pressurizes the loop; if the air exhaust screw is continuously lowered, the air exhaust screw is not screwed, and an operator screws the air exhaust screw;
s5) the electronic stability control system judges whether the pressure in the single loop reaches a threshold value a within a set time, if yes, the indicator lamp is normally on, an operator exhausts the next loop, if the four loops are exhausted, the brake liquid adding and exhausting mode is quitted, the indicator lamp is turned off, and the electronic stability control system releases the pressure and restores the initial state; if not, repeating the pressurizing and exhausting steps until reaching the target pressure;
s6) when exhausting the next loop, the operator releases the exhaust screw of the other brake, the electronic stability control system monitors the pressure reduction of the other loop, the indicator light is turned off, the operator screws the exhaust screw, the electronic stability control system judges whether the pressure in the loop does not reduce within a certain time domain, if not, the pressurizing and exhausting steps are repeated until the pressure does not reduce; if the air conditioner continues to descend, the air conditioner indicates that the air exhausting screw is not screwed, and an operator screws the air exhausting screw.
According to the scheme, the indicator light is a signal light which can be seen outside the automobile.
According to the scheme, the set time in the step S1 is 2S.
In the above scheme, the certain time domain in steps S2 and S3 is 5S.
The invention has the beneficial effects that: the method is suitable for all passenger cars with ESCs in the current market, and manual stepping on a brake pedal is not needed, so that the labor cost is reduced; the exhaust state is identified through the existing functions on the vehicle without adopting a human-computer interaction device; meanwhile, the ESC is used for actively boosting, the time for braking and exhausting is shorter, and the exhausting effect is better.
Drawings
FIG. 1 is a control flow diagram of one embodiment of the present invention.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
As shown in fig. 1, a brake system charging and discharging control method based on an electronic stability control system includes the following steps:
the operating personnel starts the vehicle, gets into braking liquid feeding exhaust mode through on-vehicle computer, and ESC receives the instruction after, gets into the detection mode, does the pressurization to the pipeline in four return circuits of braking system and detects for whether the investigation braking circuit needs to exhaust: when the brake pressure in the loop can reach a threshold a (the threshold a has difference according to the difference of the vehicle type, ESC type and brake specification, the value can be obtained by respectively pressurizing a pipeline on a vehicle which finishes brake charging and exhausting and a vehicle which does not finish charging and exhausting, and comparing data), software judges that the brake exhausting is not needed, an indicator lamp is normally on (including but not limited to a headlight, a steering lamp, a fog lamp, a double-flashing lamp and other signal lamps which can be observed outside the vehicle) at the moment, an operator quits the brake charging and exhausting mode through a vehicle-mounted computer according to the signal, the indicator lamp is turned off at the moment, ESC releases the pressure, and the vehicle returns to the initial state; if the loop does not reach the threshold value a within the specified time, the software judges that air exists in the loop, liquid charging and air discharging are needed, at the moment, the ESC enters a brake liquid charging and air discharging mode, and brake and air discharging are sequentially carried out on the four loops in sequence (the sequence comprises but is not limited to 1, a left front wheel, 2, a right rear wheel, 3, a right front wheel, 4, a left rear wheel): ESC pressurizes the single loop continuously, monitor the braking pressure of the loop in real time at the same time, after the pressure no longer rises (the pressure no longer rises, explain that the air has been compressed to the limit in the loop, possess the exhaust condition), ESC maintains pressure to the loop, the pilot lamp glimmers at the same time; the operator observes the indicator light to flash, namely, the brake exhaust screw corresponding to the loop is loosened (for example, the left front wheel can correspond to the left front steering lamp, and the right rear wheel can correspond to the right rear double flashing lamp), and the air in the loop is exhausted from the exhaust screw due to the pressure in the loop being released from the exhaust screw; when the ESC controller monitors a drop in pressure in the circuit, it recognizes that the operator is exhausting at that time, and the indicator lights go off (alerting the operator that the system has monitored an exhaust operation); when an ESC controller monitors that the reduction rate of the pressure in the loop is lower than a threshold b in a certain time domain (the threshold can be determined after the reduction rate of the loop pressure in the ESC calibration stage is measured for a plurality of times during the exhaust), software judges that the pressure in the loop is reduced to the limit at the moment, an indicator lamp flickers at the moment, and an operator observes the flickering of the indicator lamp, namely, an exhaust screw is tightened; when the ESC controller monitors that the pressure in the loop is not reduced any more, the software judges that the exhaust screw is tightened and the loop is closed, the indicator lamp is turned off at the moment, and the ESC pressurizes the loop again; if the pressure of the loop does not reach the threshold value a within the specified time, the software judges that the loop still needs to brake and exhaust, and the exhaust process is repeated; if the pressure of the loop reaches a threshold value a within the specified time, the software judges that the braking and the exhausting of the loop are finished, and at the moment, the indicator lamp at the corresponding position is normally on; when the operator observes that the indicator lamp is normally on, the circuit exhausts air, and then the next circuit exhausts air; the operator releases the exhaust screw of the other brake, the ESC detects the pressure drop of the loop, and the indicator light is turned off; the operator observes the indicator light going out and then tightens the exhaust screw again (the loosening/tightening operation is aimed at braking the circuit for the purpose of informing the software to exhaust air); when the ESC controller monitors that the pressure of the loop does not drop any more, the software judges that the loop enters a braking and exhausting mode, and the steps are the same as the steps.
After the four loops complete braking and exhausting, an operator exits the braking liquid feeding and exhausting mode through the vehicle-mounted computer, the vehicle indicator lights are turned off, and the ESC releases pressure and recovers to an initial state.
Claims (4)
1. The brake system liquid charging and exhausting control method based on the electronic stability control system is characterized by comprising the following steps of:
s1) an operator starts a vehicle, the vehicle enters a brake charging and exhausting mode through a vehicle-mounted computer, the pressure in a brake loop of the vehicle is monitored through an electronic stability control system, the brake loop is pressurized, whether the pressure in the loop reaches a threshold value a within a set time is judged, if yes, an indicator lamp is normally on, the operator exits the brake charging and exhausting mode, and the electronic stability control system releases the pressure and recovers the initial state; if not, continuing pressurizing the single loop;
s2) the electronic stability control system judges whether the pressure in the single loop does not rise any more in a certain time domain, if the pressure does not rise any more, the pressure continues to be increased, if the pressure does not rise any more, the pressure is maintained through the electronic stability control system, an indicator light flickers, and an operator releases a brake exhaust screw to perform brake exhaust;
s3) the pressure in the single loop is reduced along with the time, the electronic stability control system monitors the pressure in the loop, the indicator light is turned off, the electronic stability control system judges whether the reduction rate of the pressure in the loop in a certain time domain is lower than a threshold value b, if the reduction rate is lower than the threshold value b, the indicator light flickers, and an operator screws the exhaust screw; if the b is higher than the b, continuing to perform braking and exhausting;
s4) after the exhaust screw is screwed down, the electronic stability control system judges whether the pressure in the single loop does not drop any more within a certain time domain, if the pressure does not drop any more, the indicator lamp is turned off, and the electronic stability control system pressurizes the loop; if the air exhaust screw is continuously lowered, the air exhaust screw is not screwed, and an operator screws the air exhaust screw;
s5) the electronic stability control system judges whether the pressure in the single loop reaches a threshold value a within a set time, if yes, the indicator lamp is normally on, an operator exhausts the next loop, if the four loops are exhausted, the brake liquid adding and exhausting mode is quitted, the indicator lamp is turned off, and the electronic stability control system releases the pressure and restores the initial state; if not, repeating the pressurizing and exhausting steps until reaching the target pressure;
s6) when exhausting the next loop, the operator releases the exhaust screw of the other brake, the electronic stability control system monitors the pressure reduction of the other loop, the indicator light is turned off, the operator screws the exhaust screw, the electronic stability control system judges whether the pressure in the loop does not reduce within a certain time domain, if not, the pressurizing and exhausting steps are repeated until the pressure does not reduce; if the air conditioner continues to descend, the air conditioner indicates that the air exhausting screw is not screwed, and an operator screws the air exhausting screw.
2. The brake system charging and discharging control method based on the electronic stability control system according to claim 1, wherein the indicator light is a signal light visible outside the vehicle.
3. The method for controlling charging and discharging of a brake system based on an electronic stability control system according to claim 1, wherein the predetermined time in step S1 is 2S.
4. The method for controlling charging and discharging of a brake system based on an electronic stability control system according to claim 1, wherein the certain time domain in steps S2 and S3 is 5S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011357583.5A CN112477836B (en) | 2020-11-27 | 2020-11-27 | Brake system liquid feeding and exhausting control method based on electronic stability control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011357583.5A CN112477836B (en) | 2020-11-27 | 2020-11-27 | Brake system liquid feeding and exhausting control method based on electronic stability control system |
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| Publication Number | Publication Date |
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| CN112477836A true CN112477836A (en) | 2021-03-12 |
| CN112477836B CN112477836B (en) | 2022-03-18 |
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| CN202011357583.5A Active CN112477836B (en) | 2020-11-27 | 2020-11-27 | Brake system liquid feeding and exhausting control method based on electronic stability control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113022526A (en) * | 2021-03-31 | 2021-06-25 | 东风汽车集团股份有限公司 | Exhausting and detecting method for hydraulic brake circuit of line control brake system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103832426A (en) * | 2012-11-20 | 2014-06-04 | 福特全球技术公司 | Method for venting of hydraulic brake system of vehicle and brake system controller |
| US20150136551A1 (en) * | 2013-11-20 | 2015-05-21 | Ford Global Technologies, Llc | Method for Bleeding a Vehicle Brake System |
| CN108001438A (en) * | 2017-11-17 | 2018-05-08 | 浙江零跑科技有限公司 | A kind of method for exhausting of braking system of electric car |
| CN109693655A (en) * | 2017-10-23 | 2019-04-30 | 上海汽车集团股份有限公司 | The liquid feeding method for exhausting and system of brake system of car |
| CN111307473A (en) * | 2020-03-24 | 2020-06-19 | 吉林大学 | Automatic exhaust device and exhaust method of integrated electro-hydraulic brake |
-
2020
- 2020-11-27 CN CN202011357583.5A patent/CN112477836B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103832426A (en) * | 2012-11-20 | 2014-06-04 | 福特全球技术公司 | Method for venting of hydraulic brake system of vehicle and brake system controller |
| US20150136551A1 (en) * | 2013-11-20 | 2015-05-21 | Ford Global Technologies, Llc | Method for Bleeding a Vehicle Brake System |
| CN109693655A (en) * | 2017-10-23 | 2019-04-30 | 上海汽车集团股份有限公司 | The liquid feeding method for exhausting and system of brake system of car |
| CN108001438A (en) * | 2017-11-17 | 2018-05-08 | 浙江零跑科技有限公司 | A kind of method for exhausting of braking system of electric car |
| CN111307473A (en) * | 2020-03-24 | 2020-06-19 | 吉林大学 | Automatic exhaust device and exhaust method of integrated electro-hydraulic brake |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113022526A (en) * | 2021-03-31 | 2021-06-25 | 东风汽车集团股份有限公司 | Exhausting and detecting method for hydraulic brake circuit of line control brake system |
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| CN112477836B (en) | 2022-03-18 |
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