CN108454583A - Method for replacing brake fluid and motor vehicles - Google Patents
Method for replacing brake fluid and motor vehicles Download PDFInfo
- Publication number
- CN108454583A CN108454583A CN201810131598.6A CN201810131598A CN108454583A CN 108454583 A CN108454583 A CN 108454583A CN 201810131598 A CN201810131598 A CN 201810131598A CN 108454583 A CN108454583 A CN 108454583A
- Authority
- CN
- China
- Prior art keywords
- brake
- motor vehicles
- braking system
- unit
- internal combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 25
- 230000004913 activation Effects 0.000 claims description 15
- 230000003213 activating effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003915 liquefied petroleum gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/82—Brake-by-Wire, EHB
-
- 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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Regulating Braking Force (AREA)
Abstract
The present invention relates to a kind of methods for replacing the brake fluid of the brake-by-wire braking system (3) for the motor vehicles (1) for including at least one internal combustion engine (2).In order to replace brake fluid without generating diagnostic trouble code, when motor vehicles (1) are in halted state and internal combustion engine (2) just replaces brake fluid in the running.
Description
Technical field
The present invention relates to a kind of brake-by-wire braking systems for replacing the motor vehicles for including at least one internal combustion engine
The method of brake fluid.
In addition, the present invention relates to a kind of motor vehicles, which there is at least one internal combustion engine, brake-by-wire to brake
System, be connected to brake-by-wire braking system for monitor brake-by-wire braking system it is at least one can detection of electrons fortune
At least one electronic monitoring unit of row parameter, be connected to monitoring unit for activating or deactivate at least one of monitoring unit
Electronic activation unit, at least one detection unit whether being switched on for electronically detecting internal combustion engine for being connected to activation unit
And it is connected at least one sensor unit that halted state whether is in for detection of electrons motor vehicles of activation unit.
Background technology
Known vehicles are equipped with brake-by-wire braking system, the current work of the brake pedal of brake-by-wire braking system
Make position to be detected by sensor and be converted into the control letter for the hydraulic system of electronically actuated brake-by-wire braking system
Number, hydraulic pressure is applied to wheel drag by the hydraulic system of the brake-by-wire braking system.Brake pedal and hydraulic system
It is mechanically decoupled.Functionally, only has electronics connection between brake pedal and hydraulic system.
The brake fluid being arranged in hydraulic system should be replaced by the time interval of restriction.This is especially necessary
, because brake fluid can absorb moisture at any time, this can lead to contacting or inciting somebody to action with brake fluid for brake-by-wire braking system
The corrosion for the component to be contacted with brake fluid.The reliability of brake fluid reduces also with the increase of duration, thus
Maintain the replacement cycle as defined in brake fluid.
In order to replace the brake fluid of brake-by-wire braking system, consumer, which can open or remove, to be arranged in caliper
On hydraulic system exhaust bolt, and pumping motion then can be executed on brake pedal.In this case, by line
Control moves the current brake pressure that braking system is established and currently by the way that there are deviations between the brake pressure of brake pedal requirement.
Because usually electronically detecting the corresponding current brake established by brake-by-wire braking system in the motor vehicle
The deviation of pressure and the corresponding brake pressure currently required, so during described replacement process, if corresponding inspection
It is more than predetermined limit value to survey deviation, then electronically produces diagnostic trouble code.The diagnostic trouble code causes motor vehicles
Instrument board in associated with brake-by-wire braking system emergency warning lamp light.In order to eliminate the state of motor vehicles,
Consumer must drive at the vehicle dealer for removing troubleshooting, so that emergency warning lamp is no longer lit.
It is furthermore possible to also provide since the corresponding current brake pressure that brake-by-wire braking system is established is worked as with corresponding
The a certain deviation of the brake pressure of preceding requirement, at least one wheel drag are isolated by activating at least one hydraulic valve, with
Just the leakage of the brake fluid at the wheel drag is prevented.Then the braking stream at the wheel drag cannot be discharged
Body, to which brake fluid cannot be replaced completely.In addition, in the case where activating hydraulic valve, diagnostic trouble code is also generated, this is examined
Disconnected failure code is associated with disadvantages mentioned above.
In principle, monitoring and failure message above-mentioned during vehicle is run are useful.However, when replacing brake fluid
When, above-mentioned monitoring and failure message are very annoying for consumers, because workshop is always required to remove failure generation
Code.This is not only time-consuming, but also also associated with specific cost once in a while.In order to avoid above-mentioned automation process or adjoint diagnosis
Failure code, consumer can disconnect Vehicular battery.However, disconnection Vehicular battery leads to many electronic modules of motor vehicles
Resetting, this is typically undesirable.
Invention content
The purpose of the present invention is can replace the brake-by-wire braking system of the motor vehicles including at least one internal combustion engine
Brake fluid, without disadvantages mentioned above occurs.
According to the present invention, which is realized by the method for the feature with claim 1.It discloses a kind of for replacing
The method of the brake fluid of the brake-by-wire braking system of motor vehicles including at least one internal combustion engine, wherein working as motor vehicles
Brake fluid is just replaced in the running in halted state and internal combustion engine.
It should be noted that the feature individually implemented in the following description and measure can be with any technically useful
Mode is combined with each other and discloses other embodiments of the invention.Specification characterizes and specifies this hair especially in conjunction with attached drawing
It is bright.
Present invention utilizes following facts：If motor vehicles be in halted state and if motor vehicles internal combustion engine
It is operating, is then usually deactivating the corresponding current brake pressure established by brake-by-wire braking system and corresponding current requirement
Brake pressure deviation above-mentioned electronic monitoring.Therefore, under the state of motor vehicles, brake fluid can be replaced and
Diagnostic trouble code is not generated and not by least one hydraulic valve by the liquid of wheel drag and brake-by-wire braking system
The rest part of pressure system is isolated.Consumer can also carry out replacement brake fluid and be examined without finding vehicle dealer to remove
Disconnected failure code.It reduce the operating cost of motor vehicles and maintenance costs.
Internal combustion engine may, for example, be petrol engine or diesel engine.Motor vehicles can be passenger car or freight
.Motor vehicles may be implemented as only through oil-engine driven non-hybrid vehicle.
According to an advantageous embodiment, electronically detect motor vehicles whether in halted state and internal combustion engine whether
It is operating, wherein if electronically detecting that motor vehicles are in halted state and internal combustion engine is operating, in vehicle
In deactivate brake-by-wire braking system it is at least one can detection of electrons operating parameter electronic monitoring.This prevents from working as motor vehicle
Just executing the monitoring of operating parameter in the running in halted state and internal combustion engine.Therefore, in the operating parameter detected
In the case that predetermined limit value deviates preset range, diagnostic trouble code is not generated in brake-by-wire braking system and/or is not had
There is mechanical intervention.It can electronically detect whether motor vehicles are located with the Vehicular sensor device of application provide or other
Whether operated in halted state and internal combustion engine.Monitoring can also pass through the electronic monitoring of application provide or other
Device executes, the electronic monitoring device can individually implement or the vehicle electronics by providing in software it is real
Portion is applied to implement.Operating parameter for example can be the volume of hydraulic pressure present in hydraulic system or brake fluid.It is alternative
Ground, operating parameter can be the current operating parameter of brake-by-wire braking system detected and constant or variable predetermined pole
Deviation between limit value.In addition, two or more operating parameters of brake-by-wire braking system can be supervised by suitably electronics
Control also deactivates the monitoring wherein if motor vehicles are in halted state and internal combustion engine is operating.
Another advantageous embodiment provides, and in order to which whether detection of electrons motor vehicles are in halted state, uses
At least one vehicle-wheel speed sensor.By by vehicle-wheel speed sensor or wheel speed sensor generation can be by wired
Or it is wirelessly transmitted to the electronic signal of vehicle electronics, it can determine whether motor vehicles are in halted state for certain.For
Whether detection of electrons motor vehicles are in halted state, can also use two or more vehicle-wheel speed sensors.
According to another advantageous embodiment, the current brake pressure established by brake-by-wire braking system can be electronically detected
The operating parameter of power and the deviation of the brake pressure currently required as brake-by-wire braking system.Because if at motor vehicles
It is being operated in halted state and internal combustion engine, is then deactivating the electronic monitoring of the operating parameter, so replacing brake fluid
In the case of, it reliably prevents and generates corresponding diagnostic trouble code and/or at least one wheel drag by activating extremely
Lack a hydraulic valve and be isolated with hydraulic system, this will prevent from replacing brake fluid completely.
Above-mentioned purpose is realized by the motor vehicles of the feature with claim 5, wherein activation is single according to the present invention
If member is designed to electronically detect that motor vehicles are in halted state and interior by detection unit and sensor unit
Combustion engine is operating, then deactivates monitoring unit.
The above-mentioned advantage referred to reference to this method is accordingly associated with motor vehicles.The advantageous embodiment of this method can be with
Corresponding to the advantageous embodiment of motor vehicles, even if this is not explicitly pointed out below.
Internal combustion engine can be petrol engine or diesel engine.Brake-by-wire braking system preferably includes deceleration of electrons
Power assisting device.Electronic monitoring unit and/or activation unit can be implemented by the vehicle electronics provided or can
To be implemented as individual unit.Detection unit and/or sensor unit can be by the Vehicular sensor devices that provide
To implement or be implemented as individual unit.
According to advantageous embodiment, sensor unit includes at least one vehicle-wheel speed sensor.It is above-mentioned to refer to this method
Corresponding embodiment the advantages of referring to and embodiment version it is accordingly associated with the embodiment.
It is further favourable that monitoring unit be designed to electronically detect established by brake-by-wire braking system it is current
Operating parameter of the deviation of brake pressure and the brake pressure currently required as brake-by-wire braking system.With reference to this method
The above-mentioned advantage and embodiment version that corresponding embodiment refers to are accordingly associated with the embodiment.
As described above, internal combustion engine can be such as petrol engine or diesel engine.Internal combustion engine can also be embodied as energy
Enough burn the engine of any kind of gas (for example, compressed natural gas (CNG), liquefied petroleum gas (LPG)).Motor vehicles can
To be passenger car, bus or goods vehicle.The motor vehicles may be implemented as only by oil-engine driven immiscible
Close power car.The motor vehicles may be implemented as not being only by oil-engine driven but can also pass through electro-motor
The hybrid vehicle of driving.Vehicle can also only be driven by electro-motor, this should be included within the scope of the invention.
In this respect, if electro-motor is switched on, this method can be performed.
Description of the drawings
Other advantageous embodiments of the present invention are disclosed in dependent claims and following description of the drawings.In attached drawing：
Fig. 1 shows the flow chart of exemplary embodiment according to the method for the present invention, and
Fig. 2 shows the schematic diagrames of the exemplary embodiment of motor vehicles according to the present invention.
Specific implementation mode
Fig. 1 shows the brake-by-wire system according to the present invention for replacing the motor vehicles for including at least one internal combustion engine
The flow chart of the exemplary embodiment of the method for the brake fluid of dynamic system.
In step S1 or original state, executing at least one of brake-by-wire braking system in the car can detection of electrons
Operating parameter electronic monitoring, the current brake pressure that wherein detection of electrons is established by brake-by-wire braking system with currently want
The deviation for the brake pressure asked is as operating parameter.
In step s 2, electronically whether detection motor vehicles operating in halted state and internal combustion engine.
In order to which whether detection of electrons motor vehicles stop, at least one vehicle-wheel speed sensor can be used.
If electronically detect in step s 2 motor vehicles be in halted state and internal combustion engine operating or
Electro-motor is switched on, then in step s3, deactivates the current brake pressure established by brake-by-wire braking system and currently want
The electronic monitoring of the deviation for the brake pressure asked.
In step s 4, when motor vehicles are in halted state and internal combustion engine is operating or electro-motor is switched on
When braking system is moved by On-line Control brake pedal pumping motion during the hydraulic pressure of braking system is moved via On-line Control
The outlet opened in system is discharged brake fluid and replaces brake fluid.
In step s 5, after completing the replacement of brake fluid, internal combustion engine or electro-motor is closed or executes drive
It is dynamic.
Fig. 2 shows the schematic diagrames of the exemplary embodiment of the motor vehicles 1 according to the present invention with internal combustion engine 2.
Motor vehicles 1 include the brake-by-wire braking system 3 with hydraulic system 4, not showing for hydraulic system 4
The deceleration of electrons device 5 of the active parts gone out and be connected to deceleration of electrons device 5 for detecting unshowned gas pedal
Current working site accelerator pedal sensor 6.Hydraulic pressure can be applied to wheel drag 7 by hydraulic system 4.
In addition, motor vehicles 1 include be connected to brake-by-wire braking system 3 for monitoring brake-by-wire braking system 3
It is at least one can detection of electrons operating parameter electronic monitoring unit 8.Monitoring unit 8 is designed to electronically detect by line
Control moves the deviation between the current brake pressure that braking system 3 is established and the brake pressure currently required as brake-by-wire system
The operating parameter of dynamic system 3.
In addition, motor vehicles 1 include the electronic activation for activating or deactivating monitoring unit 8 for being connected to monitoring unit 8
Unit 9.
Motor vehicles 1 also have the detection unit whether connected for detection of electrons internal combustion engine 2 for being connected to activation unit 9
10。
In addition, motor vehicles 1, which have, is connected to stopping for whether detection of electrons motor vehicles 1 to be in for activation unit 9
The sensor unit 11 of state.Sensor unit 11 may include at least one unshowned vehicle-wheel speed sensor.
If activation unit 9 is designed to electronically detect motor vehicles by detection unit 10 and sensor unit 11
1 is operating in halted state and internal combustion engine 2, then deactivates monitoring unit 8.
Reference numerals list：
1 motor vehicles
2 internal combustion engines
3 brake-by-wire braking systems
4 hydraulic systems
5 deceleration of electrons devices
6 accelerator pedal sensors
7 wheel drags
8 monitoring units
9 activation units
10 detection units
11 sensor units
The step of S1 this method (monitoring deviation)
The step of S2 this method (vehicle is in halted state and engine is operating)
The step of S3 this method, (deactivates deviation monitoring)
The step of S4 this method, (replaces brake fluid)
The step of S5 this method, (closes engine or drive mode)
Claims (7)
1. the system of brake-by-wire braking system (3) of the one kind for replacing the motor vehicles (1) for including at least one internal combustion engine (2)
The method of dynamic fluid,
Wherein, when the motor vehicles (1) are in halted state and the internal combustion engine (2) just replaces the braking in the running
Fluid.
2. according to the method described in claim 1,
It is characterized in that,
Electronically detect whether the motor vehicles (1) operating in halted state and the internal combustion engine (2),
In if electronically detecting that the motor vehicles (1) are in halted state and the internal combustion engine (2) is operating, in institute
State the electronics prison at least one operating parameter that can electronically detect that the brake-by-wire braking system (3) is deactivated in vehicle
Control.
3. according to the method described in claim 2,
It is characterized in that,
At least one vehicle-wheel speed sensor is used for whether motor vehicles described in detection of electrons (1) are in halted state.
4. according to the method in claim 2 or 3,
It is characterized in that,
The brake pressure for electronically detecting the current brake pressure established by the brake-by-wire braking system (3) and currently requiring
Operating parameter of the deviation as the brake-by-wire braking system (3).
5. a kind of motor vehicles (1), have：
At least one internal combustion engine (2),
Brake-by-wire braking system (3),
At least one electronic monitoring unit (8), at least one electronic monitoring unit (8) are connected to the brake-by-wire system
Dynamic system (3), for monitor the brake-by-wire braking system (3) it is at least one can detection of electrons operating parameter,
At least one electronic activation unit (9), at least one electronic activation unit (9) are connected to the monitoring unit
(8), for activating or deactivating the monitoring unit (8),
At least one detection unit (10), at least one detection unit (10) are connected to the activation unit (9), are used for
Whether internal combustion engine described in detection of electrons (2) is switched on, and
At least one sensor unit (11), at least one sensor unit (11) are connected to the activation unit (9),
Whether it is in halted state for motor vehicles described in detection of electrons (1),
It is characterized in that,
The activation unit (9) is if be designed to through the detection unit (10) and the sensor unit (11) electronically
It detects that the motor vehicles (1) are in halted state and the internal combustion engine (2) is operating, then deactivates the monitoring unit
(8)。
6. motor vehicles (1) according to claim 5,
It is characterized in that,
The sensor unit (11) includes at least one vehicle-wheel speed sensor.
7. motor vehicles (1) according to claim 5 or 6,
It is characterized in that,
The monitoring unit (8) is designed to electronically detect the current brake established by the brake-by-wire braking system (3)
Operating parameter of the deviation as the brake-by-wire braking system (3) between pressure and the brake pressure currently required.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017202587.5A DE102017202587A1 (en) | 2017-02-17 | 2017-02-17 | Method for replacing a brake fluid and motor vehicle |
| DE102017202587.5 | 2017-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108454583A true CN108454583A (en) | 2018-08-28 |
Family
ID=63046037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810131598.6A Pending CN108454583A (en) | 2017-02-17 | 2018-02-09 | Method for replacing brake fluid and motor vehicles |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108454583A (en) |
| DE (1) | DE102017202587A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111137255A (en) * | 2020-02-25 | 2020-05-12 | 莱芜职业技术学院 | Vehicle brake fluid replacement machine and replacement method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110467143B (en) * | 2019-09-02 | 2020-11-10 | 余俊炜 | Automobile brake fluid discharging device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6325471B1 (en) | 2000-03-09 | 2001-12-04 | Ford Global Technologies, Inc. | Brake-by-wire system having conditioned brake boost termination at key off |
| US7357161B2 (en) | 2006-02-02 | 2008-04-15 | Norco Industries, Inc. | Brake flush machine with ordered cylinder extraction |
| US8215343B2 (en) | 2007-08-01 | 2012-07-10 | Rti Technologies, Inc. | Automotive service equipment and method for brake fluid exchange with wireless brake bleeding system |
| US8874341B2 (en) | 2010-02-09 | 2014-10-28 | Ford Global Technologies, Llc | Electronic brake actuator brake-by-wire system and method |
-
2017
- 2017-02-17 DE DE102017202587.5A patent/DE102017202587A1/en not_active Withdrawn
-
2018
- 2018-02-09 CN CN201810131598.6A patent/CN108454583A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111137255A (en) * | 2020-02-25 | 2020-05-12 | 莱芜职业技术学院 | Vehicle brake fluid replacement machine and replacement method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017202587A1 (en) | 2018-08-23 |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180828 |