CN108001438B - A kind of method for exhausting of braking system of electric car - Google Patents
A kind of method for exhausting of braking system of electric car Download PDFInfo
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- CN108001438B CN108001438B CN201711148287.2A CN201711148287A CN108001438B CN 108001438 B CN108001438 B CN 108001438B CN 201711148287 A CN201711148287 A CN 201711148287A CN 108001438 B CN108001438 B CN 108001438B
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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
- B60T17/002—Air treatment devices
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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
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention discloses a kind of method for exhausting of braking system of electric car, first trample brake pedal, gather the air in brake circuit at bleed screw mounting hole, and increase the pressure of brake circuit, open vacuum pump at this time, will test chamber and vacuumize；Then the air that brake fluid is mixed in brake circuit is pumped into test chamber；Then the pressure plunger in test chamber is driven, the pressure in test chamber is gradually increasing；If the pressure of test chamber is more than or equal to setting value, it is relatively high to illustrate that the brake fluid in test chamber accounts for, and then proves that the exhaust of brake circuit is abundant, vent sequence can be terminated at this time, the brake fluid in test chamber is then drawn into a liquid storage chamber；It is on the contrary then repeat above procedure, until sufficiently be vented until.One man operation can be achieved in the present invention, to improve efficiency, and can accurately control vent sequence, it is ensured that exhaust thoroughly, avoids excessive exhaust.
Description
Technical field
The present invention relates to electric car manufacturing technology fields, more particularly, to a kind of exhaust side of braking system of electric car
Method.
Background technique
It includes full of before the brake fluid pot of brake fluid, master cylinder, control that the braking system of electric car, which is usually one,
The preceding wheel cylinder of brake, the fluid pressure governor for distributing brake fluid, is connected to the rear wheel cylinder for controlling rear brake
The closed system that the components such as the brake piping between a component are constituted.When work, of a substantially incompressible brake fluid is being
It is moved in the circuit of system, tramples brake pedal, and act on by the power-assisted of vacuum booster, make master cylinder that brake fluid be pushed to exist
Movement in circuit, and then preceding wheel cylinder and the movement of rear wheel cylinder are pushed, forward and backward brake operation generates braking moment.
It is known that air has compressible characteristic, therefore, once there is air in the mixed circuit system closed of braking system,
Air when braking in circuit can be compressed in advance, then could push braking liquid movement, this will cause brake-pedal travel
Loss, to increase brake reaction time, and reduces the output of brake force, causes serious security risk.
For this purpose, people deflate according to suitable position setting is corresponding in closed brake circuit the case where actual tests
Screw.After repeatedly trampling brake pedal, the air in circuit can gradually flow and gather the position for leading setting bleed screw, this
When openable bleed screw, the gas for being mixed with brake fluid can be released outward.
In the prior art, people can in several ways discharge the air in the loop of braking system,
The mode of most common of them is to be stepped on by two operator's interoperations wherein a people ceaselessly tramples braking in driver's cabin
Then plate tramples brake pedal holding to be clustered together the air in circuit and to be moved at setting bleed screw
State, high pressure conditions are then kept in brake circuit, and the bleed screw in brake circuit under vehicle body is opened, braked back by another people
The air that brake fluid is mixed in road can be discharged to form bubble.When visually observe emerge there is no bubble when
Complete vent sequence.Although this method does not need special device, but have following defects that and on the one hand need two people's cooperations
Operation, therefore its inefficiency；On the other hand, there is brake fluid corrosivity therefore will cause to the health of operator
Detrimental effect.In particular, this method requires operator to have experience abundant, and no-float is wanted between two people,
Otherwise exhaust is easy to produce to be not thorough or the problem of excessive exhaust.
A kind of " exhaust apparatus of motor vehicle braking system " is disclosed in Chinese patent literature, notification number is
CN203047242U, motor vehicle braking system include the brake wheel cylinder with fuel outlet；Exhaust apparatus includes transparent aspiration pump,
Hand control switch and exhaust tube are in series in the starting or stopping control circuit of the aspiration pump, which, which has, is connected to aspiration pump
Entrance side first end, and the second end for being connected to fuel outlet.When exhaust, starts aspiration pump, observe transparent
Situation in exhaust tube illustrates that exhaust is completed, can close aspiration pump if oneself is had brake fluid outflow.
However above-mentioned exhaust apparatus still has following defect: firstly, two people are vented or needed by the exhaust apparatus
In other words compounding practice needs to trample brake pedal repeatedly by a people, to arrive the air accumulation in brake circuit
At bleed screw, then by another people observe exhaust tube the case where.Secondly, operator is quasi- the case where being difficult to through observation exhaust tube
Really determine exhaust gas conditions, is easy to produce exhaust and is not thorough or the problem of excessive exhaust.
Summary of the invention
The purpose of the present invention is to solve effects present in a kind of existing method for exhausting of braking system of electric car
Rate is low, is difficult to the problem of accurately controlling, and provides a kind of method for exhausting of braking system of electric car, it can be achieved that one man operation, from
And improve efficiency, and vent sequence can be accurately controlled, it is ensured that exhaust thoroughly, avoids excessive exhaust.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of method for exhausting of braking system of electric car, includes the following steps:
A. it is connected with the one end for the exhaust tube for being equipped with third solenoid valve with a detection cylinder body with test chamber, is taken out
The connector of the tracheae other end is connected with the bleed screw mounting hole of braking system；
B. with the test chamber of the bleeding point of one vacuum pump of piping connection and detection cylinder body and the storage of brake fluid can be stored
Sap cavity, and the first solenoid valve is set on connection vacuum pump and the pipeline of liquid storage chamber, in the pipeline of connection vacuum pump and test chamber
With liquid suction pipe connecting detection chamber and liquid storage chamber, and the 4th solenoid valve is arranged in upper setting second solenoid valve on liquid suction pipe；
C. brake pedal is first trampled repeatedly, the air in brake circuit is made to gather the bleed screw installation of brake circuit
At hole, be then continuously stepping on brake pedal, be gradually increasing the pressure of brake circuit, be arranged at this time third solenoid valve with connect
The hydrostatic sensor on exhaust tube between head exports a signal to control device；
D. when the pressure of brake circuit is more than or equal to 3 megapascal, control device opens second solenoid valve, and opens vacuum
Pump, will test the intracorporal test chamber of cylinder and vacuumizes, then turn off second solenoid valve；
E. control device opens third solenoid valve, and the air that brake fluid is mixed in brake circuit passes through exhaust tube
Into in test chamber；
F. control device closes third solenoid valve, starts a driving device, then to push one end in test chamber
Pressure plunger is mobile, so that the pressure for the air for being mixed with brake fluid in test chamber be made to be gradually increasing, setting is on detection cylinder body
Hydrostatic sensor then to control device output test chamber in pressure signal；
G. when driving device drives pressure plunger to move in place, control device records the maximum pressure letter in test chamber
Number value P, then control device opens the 4th solenoid valve and the first solenoid valve, and vacuum pump makes to form negative pressure in liquid storage chamber, thus
Pressure difference is formed between the liquid storage chamber of negative pressure and the test chamber of high pressure, i.e. pass through liquid suction pipe flows into storage to the brake fluid in test chamber
In sap cavity；
H. control device is by maximum pressure signal value P and pre-stored setting value P0It is compared and judges, such as
P is more than or equal to P to fruit at this time0, then terminate vent sequence；If this P is less than P0, then step c is repeated to step g.
Method for exhausting of the invention first passes through tramples brake pedal repeatedly, and the air in brake circuit is gathered deflation spiral shell
At nail, then test chamber is set to form negative pressure by vacuum pump, so as to by the air and a small amount of brake fluid one at bleed screw
It rises and is drawn into test chamber, then pressed by the mobile gas-liquid mixture in test chamber of fixed range of pressure plunger, thus
Situation can be risen by the pressure to test chamber and judge the gas-liquid ratio in test chamber, and then confirm the air in brake circuit
Whether be fully drained, can be realized people's high-efficiency exhaust, at the same can accurate judgement exhaust effect, avoid exhaust insufficient or
Exhaust is excessive.
Preferably, the driving device includes the outer tube being connected with pressure plunger, connected in outer tube internal screw thread
There is driving screw rod, one end of the driving screw rod stretching outer tube and the output shaft of motor are coaxially connected, the motor and control
Device electrical connection, the lateral wall of the outer tube are equipped with axial limit card slot, and the end of the detection cylinder body is equipped with detent
Retention bead in limit card slot, when needing to start driving device, control device starts motor, and motor drives driving screw rod to turn
It is dynamic, to drive the outer tube axial movement being threadedly coupled with it, and then pressure plunger is driven to move in test chamber.
Motor work drives screw turns to drive, since outer tube can not be rotated by the limit of retention bead,
Therefore driving screw rod can drive the outer tube being threadedly coupled with it to move along axial reciprocating, and then drive pressure plunger mobile.
Preferably, liquid storage chamber top vertical be equipped with and protrude into the liquid back pipe of liquid storage chamber bottom, the liquid suction pipe
One end is connected to detection cylinder body far from pressure plunger one end, and the other end of liquid suction pipe is connected with the upper end of liquid back pipe, the pumping
Tracheae is connected on the side wall of detection cylinder body, and the position sensor for detecting pressure plunger position is equipped on detection cylinder body,
And steps are as follows for increase in step g: control device is moved to pressure plunger in test chamber close to pumping by driving device
Liquid pipe one end flows into the brake fluid that air is mixed in test chamber in liquid storage chamber, and position sensor is defeated to control device at this time
A position signal out, control device reset pressure plunger reverse movement by driving device.
The liquid back pipe plugged to bottom is arranged in the present invention in liquid storage chamber, in this way, when vacuum pump makes liquid storage chamber form negative pressure
When, it can avoid being pumped out from the brake fluid that liquid suction pipe enters in liquid storage chamber by vacuum.And entered in liquid storage chamber by liquid back pipe
Air in brake fluid and air mixture can rapidly be discharged into the sky of the upside in liquid storage chamber under the action of liquid storage chamber negative pressure
Between, to realize good gas-liquid separation.In particular, the present invention is when will test intracavitary brake fluid and be drawn into liquid storage chamber,
Driving device can be made to drive pressure plunger is mobile to push brake fluid by control device, to can ensure that the braking in test chamber
Liquid is completely transferred in liquid storage chamber.
Therefore, the invention has the following beneficial effects: achievable one man operations, to improve efficiency, and can accurately control
Vent sequence processed, it is ensured that exhaust thoroughly, avoids excessive exhaust.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of exhaust apparatus of the invention.
In figure: 1, vacuum pump 2, liquid storage chamber 21, liquid back pipe 3, detection cylinder body 31, test chamber 32, pressured column
Fill in 33, retention bead 40, the first solenoid valve 41, second solenoid valve 42, third solenoid valve 43, the 4th solenoid valve
5, motor 51, driving screw rod 52, outer tube 521, limit card slot 6, exhaust tube 61, connector 7, liquid suction pipe.
Specific embodiment
The present invention will be further described with specific embodiment with reference to the accompanying drawing.
A kind of method for exhausting of braking system of electric car, using exhaust apparatus as shown in Figure 1, which includes
The detection cylinder body 3 of control device, vacuum pump 1, liquid storage chamber 2 and bar shape with logic controller, detecting has in cylinder body
One bleeding point of the test chamber 31 of cylindrical shape, vacuum pump is connected by pipeline with liquid storage chamber, another pumping of vacuum pump
Port is connected by pipeline with the side of the test chamber of detection cylinder body.It is arranged the on connection vacuum pump and the pipeline of liquid storage chamber
One solenoid valve 40, to control the on-off of the pipeline；Second solenoid valve 41 is set on connection vacuum pump and the pipeline of test chamber, with
Control the on-off of the pipeline.
In addition, a pressure plunger 32 is arranged in the test chamber of detection cylinder body one end, the pressure plunger and a driving are filled
Set associated, the power source of the driving device is a motor 5, in order to which control device can pass through the motor control of control driving device
Pressure plunger processed moves left and right.Detect the exhaust tube that a communication with detection chamber is arranged far from the other end side of pressure plunger for cylinder body
6, the connector 61 that can be connected with the bleed screw mounting hole of braking system is then arranged in the other end of exhaust tube, and is taking out
The third solenoid valve 42 of controllable on-off is set on tracheae.
In addition, liquid storage chamber is connected with test chamber by a liquid suction pipe 7, and controllable on-off is set on liquid suction pipe
4th solenoid valve 43.Certainly, the hydraulic biography that can sense internal pressure need to be also respectively set in we on exhaust tube and test chamber
Sensor, control device and vacuum pump, the motor of driving device and the electrical connection of the first, second, third, fourth solenoid valve, and
It is arranged one on control device to start switch.
The method for exhausting of braking system of electric car specifically comprises the following steps:
A. it is connected with one end of exhaust tube with a detection cylinder body, the exhaust tube and the detection intracorporal test chamber phase of cylinder
Connection, and equipped with the third solenoid valve of a controllable on-off on exhaust tube, by the connector of the exhaust tube other end and braking
The bleed screw mounting hole of system is connected；
B. first bleeding point of one vacuum pump of piping connection and the test chamber of detection cylinder body are used, while being connected with pipeline
It connects second bleeding point of the vacuum pump and the liquid storage chamber of brake fluid can be stored.Certainly, the pipeline for connecting liquid storage chamber is preferably answered
It is connected to the top of liquid storage chamber.First solenoid valve of controllable on-off is set on connection vacuum pump and the pipeline of liquid storage chamber,
Connect the second solenoid valve that controllable on-off is set on vacuum pump and the pipeline of test chamber.Liquid suction pipe connecting detection chamber and storage are used again
Sap cavity, and the 4th solenoid valve that can control on-off is set on liquid suction pipe；
C. operator first tramples brake pedal repeatedly, gathers the air being mixed in the brake fluid of brake circuit gradually
To at the bleed screw mounting hole of brake circuit, it is then continuously stepping on brake pedal, is gradually increasing the pressure of brake circuit, this
When first hydrostatic sensor on the exhaust tube between third solenoid valve and connector be set export one to control device
Pressure signal；
D. when the pressure of brake circuit is more than or equal to 3 megapascal, control device opens second solenoid valve and vacuum pump, very
Sky pump will test the intracorporal test chamber of cylinder and vacuumize, and then turn off second solenoid valve, make to keep vacuum state in test chamber.When
So, corresponding vacuum transducer can be arranged in we in test chamber, to export the vacuum degree signal of test chamber, consequently facilitating control
Device accurately automatically controls the closing of second solenoid valve；
E. control device opens third solenoid valve, by the pressure difference of brake circuit and test chamber, mixes in brake circuit
Closing, which has the air of brake fluid to pass through exhaust tube, enters in test chamber, until being full of entire test chamber.Due to being mixed with brake fluid
Air be full of entire test chamber when, the pressure of test chamber and the pressure of brake circuit are consistent, and therefore, are arranged in examine at this time
Second hydrostatic sensor on survey cylinder body can export the pressure signal in a test chamber to control device, when the pressure is believed
When number equal with the pressure signal of first hydrostatic sensor, control device is that can determine that the air for being mixed with brake fluid full of whole
A test chamber；
F. control device closes third solenoid valve, to make test chamber constitute a closed cavity, then starts one
Driving device, to push the pressure plunger of one end in test chamber mobile, to make the air for being mixed with brake fluid in test chamber
Pressure is gradually increasing, and pressure signal of the hydrostatic sensor on detection cylinder body then into control device output test chamber is arranged in.
To be conducive to easily control the movement of pressure plunger, driving device includes the motor being electrically connected with control device 5, motor
Stepper motor preferably can be used, the coaxially connected driving screw rod 51 of the output shaft of motor, pressure plunger is far from exhaust tube
One end is then connected with an outer tube 52, and the end of the protruding detection cylinder body of outer tube, driving screw flight is connected to housing
In pipe.In this way, the outer tube being threadedly coupled with it can be driven to move along axial reciprocating when motor drive drives screw turns
It is dynamic, and then drive pressure plunger mobile.It should be noted that settable axial limit card slot 521 on the lateral wall of outer tube,
Correspondingly, retention bead 33 of the end setting detent of cylinder body in limit card slot is detected, follows driving spiral shell to avoid outer tube
Bar rotates together；
G. when driving device drives pressure plunger to move in place, control device records the maximum pressure letter in test chamber
Number value P, then control device opens the 4th solenoid valve and the first solenoid valve, and vacuum pump makes to form negative pressure in liquid storage chamber, thus
Pressure difference is formed between the liquid storage chamber of negative pressure and the test chamber of high pressure, i.e. pass through liquid suction pipe flows into storage to the brake fluid in test chamber
In sap cavity.In order to avoid the brake fluid in liquid storage chamber is siphoned away by vacuum pump, we can liquid storage chamber top vertical be arranged one
Root protrudes into the liquid back pipe 21 of liquid storage chamber bottom, and one end of liquid suction pipe is connected to detection cylinder body far from pressure plunger one end, liquid suction pipe
The other end be connected with the upper end of liquid back pipe, and exhaust tube be then connected to detection cylinder body side wall on, connect the pipe of vacuum pump
Road is then connected to the top of liquid storage chamber.In this way, the air on liquid storage chamber top is taken out when vacuum pump work and when being connected to liquid storage chamber
Negative pressure is formed out, and the brake fluid in test chamber enters the bottom of liquid storage chamber together with air, and air therein forms bubble
And gradually rise and be discharged into liquid storage chamber upper space, brake fluid then remains in the lower part of liquid storage chamber, to realize good
Gas-liquid separation.
H. control device is by maximum pressure signal value P and pre-stored setting value P0It is compared and judges, such as
P is more than or equal to P to fruit at this time0, then terminate vent sequence；If this P is less than P0, then step c is repeated to step g.
It should be noted that setting value P0It can be obtained by experiment.Specifically, the detection of appropriate volume can be first arranged in we
Chamber, and the air that brake fluid is mixed in brake circuit is drawn into test chamber, pass through artificial observation, it is ensured that finally extract out
Only brake fluid, that is to say, that the air in brake circuit has been discharged at this time.If extracted at this time is not system entirely
Hydrodynamic then correspondingly moves the volume that pressure plunger one increases test chamber, then proceedes to be evacuated, up to artificial observation to extraction
Only brake fluid position.Pressure plunger a certain distance is then moved on, so that the orthobaric volume of test chamber is set, to make
Test chamber, which is once evacuated, can ensure that all gas is fully drained in brake circuit.Then it is infused into the test chamber of orthobaric volume
Enter compressed air, until the pressure in test chamber is equal with the pressure of brake circuit.Move at this time pressure plunger one it is fixed
Distance is gradually increasing the pressure in test chamber, and hydrostatic sensor may be output to a maximum pressure signal value.When we are right
After the brake circuit of more electric cars repeats above-mentioned test, multiple maximum pressure signal values can be obtained, and it is minimum
A maximum pressure signal value can be used as setting value P of the invention0.In this way, working as mobile same one of pressure plunger admittedly
After set a distance, as long as the maximum pressure signal value P of test chamber is more than or equal to setting value P0, that is, can ensure that the air in brake circuit
It is fully drained.
In addition, we can be on detection cylinder body in order to ensure the brake fluid in test chamber is drawn into liquid storage chamber completely
Position sensor for detecting pressure plunger position is set, it is preferable that a position can be arranged in the end of detection cylinder body in we
Sensor is set, setting is corresponding on the outer tube for stretching out detection cylinder body touches block.In this way, step can be increased such as in step g
Under: control device is moved to pressure plunger in test chamber close to liquid suction pipe one end by driving device, makes mixing in test chamber
There is the brake fluid of air to flow into liquid storage chamber, touches block trigger position sensor at this time, position sensor can be to control device
A position signal is exported, control device rotates backward the motor of driving device, and pressure plunger reverse movement can be made to reset.
Claims (3)
1. a kind of method for exhausting of braking system of electric car, characterized in that include the following steps:
A. it is connected with the one end for the exhaust tube for being equipped with third solenoid valve with a detection cylinder body with test chamber, exhaust tube
The connector of the other end is connected with the bleed screw mounting hole of braking system；
B. with the test chamber of the bleeding point of one vacuum pump of piping connection and detection cylinder body and the liquid storage of brake fluid can be stored
Chamber, and the first solenoid valve is set on connection vacuum pump and the pipeline of liquid storage chamber, on connection vacuum pump and the pipeline of test chamber
Second solenoid valve is set, with liquid suction pipe connecting detection chamber and liquid storage chamber, and the 4th solenoid valve is set on liquid suction pipe；
C. brake pedal is first trampled repeatedly, gather the air in brake circuit at the bleed screw mounting hole of brake circuit,
Then be continuously stepping on brake pedal, be gradually increasing the pressure of brake circuit, be arranged at this time third solenoid valve and connector it
Between exhaust tube on hydrostatic sensor to control device export a signal；
D. when the pressure of brake circuit is more than or equal to 3 megapascal, control device opens second solenoid valve, and opens vacuum pump, will
The detection intracorporal test chamber of cylinder vacuumizes, and then turns off second solenoid valve；
E. control device opens third solenoid valve, and the air that brake fluid is mixed in brake circuit is entered by exhaust tube
In test chamber；
F. control device closes third solenoid valve, starts a driving device, then to push the pressurization of one end in test chamber
Plunger is mobile, so that the pressure for the air for being mixed with brake fluid in test chamber be made to be gradually increasing, the liquid on detection cylinder body is arranged in
Pressure sensor then exports the pressure signal in test chamber to control device；
G. when driving device drives pressure plunger to move in place, control device records the maximum pressure signal value in test chamber
P, then control device opens the 4th solenoid valve and the first solenoid valve, and vacuum pump makes to form negative pressure in liquid storage chamber, thus negative
Pressure difference is formed between the liquid storage chamber of pressure and the test chamber of high pressure, i.e. pass through liquid suction pipe flows into liquid storage chamber to the brake fluid in test chamber
It is interior；
H. control device is by maximum pressure signal value P and pre-stored setting value P0It is compared and judges, if this
When P be more than or equal to P0, then terminate vent sequence；If this P is less than P0, then step c is repeated to step g.
2. a kind of method for exhausting of braking system of electric car according to claim 1, characterized in that the driving device
Including the outer tube being connected with pressure plunger, it is connected with driving screw rod in outer tube internal screw thread, the driving screw rod stretches out outer
One end of casing and the output shaft of motor are coaxially connected, and the motor is electrically connected with control device, the lateral wall of the outer tube
It is equipped with axial limit card slot, the end of the detection cylinder body is equipped with retention bead of the detent in limit card slot, needs to open
When dynamic driving device, control device starts motor, and motor drive drives screw turns, to drive the housing being threadedly coupled with it
Pipe axial movement, and then pressure plunger is driven to move in test chamber.
3. a kind of method for exhausting of braking system of electric car according to claim 1, characterized in that on the top of liquid storage chamber
Portion is vertically equipped with the liquid back pipe for protruding into liquid storage chamber bottom, and one end of the liquid suction pipe is connected to detection cylinder body far from pressure plunger
One end, the other end of liquid suction pipe are connected with the upper end of liquid back pipe, and the exhaust tube is connected on the side wall of detection cylinder body, are examining
Cylinder body is surveyed equipped with the position sensor for detecting pressure plunger position, and steps are as follows for increase in step g: control dress
Setting is moved to pressure plunger in test chamber close to liquid suction pipe one end by driving device, makes the system that air is mixed in test chamber
Hydrodynamic flows into liquid storage chamber, and position sensor exports a position signal to control device at this time, and control device passes through driving dress
Setting resets pressure plunger reverse movement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711148287.2A CN108001438B (en) | 2017-11-17 | 2017-11-17 | A kind of method for exhausting of braking system of electric car |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711148287.2A CN108001438B (en) | 2017-11-17 | 2017-11-17 | A kind of method for exhausting of braking system of electric car |
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| CN108001438B true CN108001438B (en) | 2019-08-23 |
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Cited By (1)
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| US12162453B2 (en) | 2020-10-30 | 2024-12-10 | Westinghouse Air Brake Technologies Corporation | Vehicle braking calibration system |
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| CN108973972B (en) * | 2018-06-11 | 2020-03-17 | 浙江国自机器人技术有限公司 | Brake oil injection method and system for drum brake device and related components |
| CN109911833B (en) * | 2018-11-12 | 2022-12-13 | 中航通飞研究院有限公司 | Exhaust method of passive brake system of airplane |
| CN112248993B (en) * | 2020-09-30 | 2021-12-10 | 北汽福田汽车股份有限公司 | Exhaust device of hydraulic braking system, hydraulic braking system and vehicle |
| CN112477836B (en) * | 2020-11-27 | 2022-03-18 | 东风汽车集团有限公司 | Brake system liquid feeding and exhausting control method based on electronic stability control system |
| CN112477838B (en) * | 2020-12-01 | 2022-05-17 | 东风汽车集团有限公司 | Brake system exhaust checking system and method |
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| CN1386657A (en) * | 2002-06-22 | 2002-12-25 | 王建军 | Automobile power system using compressed air as power |
| CN106573603A (en) * | 2014-08-22 | 2017-04-19 | 克诺尔商用车制动系统有限公司 | Method for controlling a service brake device actuated by a service brake valve device as well as service brake device |
| CN204077651U (en) * | 2014-09-18 | 2015-01-07 | 吉林大学 | Be applied to the exhaust gear of hydraulic braking system for automobile |
| CN105151033A (en) * | 2015-10-08 | 2015-12-16 | 威伯科汽车控制系统（中国）有限公司 | Front-axle parking foot brake valve, brake system and detection method of parking brake functions |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12162453B2 (en) | 2020-10-30 | 2024-12-10 | Westinghouse Air Brake Technologies Corporation | Vehicle braking calibration system |
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| CN108001438A (en) | 2018-05-08 |
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