CN103832426A - Method for venting of hydraulic brake system of vehicle and brake system controller - Google Patents
Method for venting of hydraulic brake system of vehicle and brake system controller Download PDFInfo
- Publication number
- CN103832426A CN103832426A CN201310586936.2A CN201310586936A CN103832426A CN 103832426 A CN103832426 A CN 103832426A CN 201310586936 A CN201310586936 A CN 201310586936A CN 103832426 A CN103832426 A CN 103832426A
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- brake system
- pressure
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- brake
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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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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention provides a method for exhaust of at least one part of a hydraulic brake system of a vehicle. The brake system comprises at least one brake circuit. The pressure of the brake circuit can be selectively increased through at least one motor propelled pump (14a,14b), especially an ESC pump. Under the condition that an exhaust valve is not opened, a given period for increased pressure can be applied to the partial brake system for exhaust through the pump (14a,14b).
Description
Technical field
The present invention relates to a kind of method and brake system controller of at least a portion exhaust that makes hydraulic vehicle brake system, wherein, brake system comprises at least one brake circuit, and by least one electric motor driven pumping plant, the pressure of brake circuit can optionally increase.
Background technology
The hydraulic brake system using for vehicle, particularly automobile, known its correct exhaust is extremely important.In the time that brake-pressure increases, remain in bubble in system compressed, cause the elastic behavior of braking transmission channel, and therefore caused the pedal operation stroke increasing, it is thought to disturb and also form under extreme case security risk by chaufeur.
For various reasons, can not always ensure that brake system perfectly fills without gas, particularly brake system for the first time in the process of filling liquid hydraulic fluid in the time of vehicle production.Even if do not exceed safety critical threshold value, this is also by the discomfort that causes improper long pedal operation stroke and therefore cause chaufeur, and it can cause a period of time in workshop, and this should be avoided conventionally for new car.
But, traditional exhaust process relies on the pressure source of certain point from brake system to introduce hydraulic fluid, and open one or more blows off valve at other some place, then implementing fluid flows, until blow off valve is no longer emitted bubble, this process needs relatively high cost, therefore, based on the consideration of time and cost, such exhaust process is unpractical as steps necessary in vehicle production.
Summary of the invention
The object of this invention is to provide a kind of method and/or device of the above-mentioned type, in the case of the equipment and time cost without additional, it guarantees the better a kind of and/or exhaust condition of brake system more repeatably, particularly in vehicle production process, and after the maintenance work of brake system.
To achieve these goals, the present invention proposes a kind of method of at least a portion exhaust to hydraulic vehicle brake system, and wherein, brake system comprises at least one brake circuit, by at least one electric motor driven pumping plant, the pressure of this brake circuit can optionally increase.For carrying out exhaust, in the part brake system of wanting exhaust, produce the pressure increasing by pumping plant, and apply the time period of the pressure appointment of this increase, and this process is not opened blow off valve.
The activation of at least one pump will cause the drg in relevant brake circuit to be applied to immediately at utmost.Once this thing happens, can not carry more hydraulic fluid, and therefore pump resists the output of cutting out and does work, and can accumulate thus high hydrostatic pressure.
Surprisingly, have been found that if carry out the temporary transient increase of this pressure in the time applying relatively high force, even without opening blow off valve, the temporary transient increase of this pressure also will finally cause gas forever to remove from brake system, or even after pressure increase finishes again.
Its in consideration former because, gas residual in brake system is dissolved in braking liquid under the high pressure applying, and due to chemistry or physical process, after this basic keep dissolving or chemical bond therein.
Explain and be further, residual gas dissolution is after braking liquid, near the low pressure master cylinder by other position of brake system, particularly conventionally existing, residual gas is discharged again, and, with the expansion tank handshaking procedures of common existence in, gas finally escapes into expansion tank and is discharged to atmosphere from expansion tank.
May be further, under very high pressure, gas be more easily discharged than hydraulic fluid from small gap, for example, discharges from the small gap of brake-piston seal part, has therefore also realized " automatically " exhaust.
Finally, be likely also the diffusion process of the residual gas that causes of pressure through brake piping material.
Above-mentioned any phenomenon is the final major cause that gas is forever removed actually, or no other phenomenon in addition plays a role, and it be not immediately clear.
In a word, a series of test shows, by the method according to this invention, can realize the interfering residue gas scale of construction in the new car brake system of remarkable minimizing.
In the present invention, useful especially, the pump (ESC pump) being equipped with for increase the pressure in brake system in the brake regulation process by electronic stability controller can be used as electric motor driven pumping plant.Because described pump is present in brake system, and can be controlled selectively to exert pressure to brake system, therefore can realize that corresponding pressure increases and without additional equipment cost.
By contrast, if must couple additional external pump, except fringe cost, also the risk of more gases will be introduced in oriented system.
(ESC is electronic stabilizing control system to the ESC pump using in brake system, is also referred to as
[registered trade mark (RTM) of Daimler Co., Ltd]) electric piston pump normally, due to performance required in brake application, this pump can produce the over-pressure (high overpressure) that the order of magnitude is approximately 200bar.The pressure using in the method is generally greater than 50bar, is preferably more than 100bar, is particularly preferably greater than 180 to 200bar.The limit of pressure that such pressure still allows far below brake system all the time, this limit is approximately 300bar.The maximum pressure applying is under any circumstance lower than corresponding limit of pressure.
Preferably, in static vehicle, by the force applications of increase at least 5 seconds and be less than the time period of 2 minutes, preferably at least 10 seconds and be less than 1 minute, be particularly preferably approximately 10 to 20 seconds.In test before, the high pressure phase of approximately 20 seconds has shown remarkable result.The time length of high pressure phase depends on the continuous duty ability in the pumping procedure of the valve that corresponding pump cuts out in antagonism.For fear of thermal overload, also can follow off and on multiple cooling stages to implement high pressure phase.
Exhaust process is preferably carried out in a part for brake system, also passes through the suitable location of the control cock of brake system by least one pumping plant, and this part can be placed under the pressure of increase.If had independently of one another by multiple brake circuits that pressure acted on, it can or be acted on by pressure continuously simultaneously.Conventionally, the pressure that master cylinder and expansion tank region can not be increased acts on, because the described device holder as ESC pump in air inlet side (induction side) conventionally.
Preferably, can after brake system filling liquid hydraulic fluid, carry out soon for the first time according to exhaust process of the present invention, preferably in the production process of vehicle with brake system, carry out.But in principle, this process also can be carried out after safeguarding brake system in workshop.
In order to activate the exhaust process in the vehicle that comprises electronic brake controller, this electronic brake controller is connected to the CAN bus of vehicle interior and can controls at least one electronic ESC pump and multiple brake system control cock, and exhaust process preferably relies on the peripheral control unit initiation that is connected to brake controller by CAN bus.Start thus the control cock of at least one ESC pump and adjustable brake system, to accumulate the pressure of required increase in the part that can keep pressure of brake system.
Replace peripheral control unit or except peripheral control unit, the method according to this invention also can cause by the maintenance menu of built-in vehicle.Certainly, this only can occur in the time of stationary vehicle, because drg locks completely in the time that pressure increases.
If pump can provide the pressure higher than the pressure of required increase, this pressure can limit by safe bypass disc so.Selectively, can utilize revolution speed (may the be zero) active control that actual pressure measurements is passed through to regulate or adjust pressure.
In addition, in order to realize above-mentioned target, the present invention proposes the brake system controller of the vehicle for thering is brake system, at least one hydraulic fluid pump that this brake system has dynamic Ride Control System and uses in dynamic Driving control process, wherein, this controller can be controlled at least one pump, and can control the valve being provided in brake system, so that at least one pump exerts pressure at least a portion of brake system.Be designed for thus the controller that makes brake system exhaust so that it activates the time period that at least one pump is specified, and in the situation that not opening blow off valve at least a portion of brake system the pressure of cumulative rises.
Brief description of the drawings
The present invention is described in detail by way of example below to use accompanying drawing.In accompanying drawing:
Fig. 1 is illustrated in the schematic diagram of the motor vehicle braking system under the common state of un-activation ABS or ESC;
Fig. 2 represents front-wheel brake to carry out brake system ESC intervention, shown in Fig. 1, and
Fig. 3 is explanation attainable improved chart in framework of the present invention in brake system exhaust process.
Detailed description of the invention
Fig. 1 represents the schematic diagram of the hydraulic brake system (running brake) of the automobile with ABS and ESC.Described brake system only illustrates as example; The present invention can be used for multiple different brake system configuration.According to legal provisions, be equipped with two separate brake circuits, in the exemplary embodiment, each brake circuit provides diagonal angle reverse drg 18a to 18d, is X-shaped configuration.Can use brake pedal 10 to realize the operation of drg on the one hand, it by brake servo unit and tandem main cylinder, applies brake-pressure to two brake circuits in known manner independently of each other.In Fig. 1, highlight thus the circuit by pressure acted on thicker line.The pressure producing by compression indicator 20 instructions that represent with symbol, and, have " ESP " in the unit of addressing, also measure by pressure sensor (pressure/electric pressure converter) pressure producing.
In order to carry out ABS function, different electromagnetic valves is provided, it is in known manner by using intermediate memory to realize braking force modulation.Just as known, whole described functions are all to control based on various vehicle parameters by the drg control unit of microprocessor control.
In order to increase brake-pressure at ESC run duration, in addition optionally provide additional fluid pressure to one or more drg 18a to 18d from two pump 14a, the 14b associated with corresponding brake circuit, these two pumps drive by share motor 16, this share motor 16 can activate by brak control unit (not shown), and the position of the brake activation valve shown in controlling.
Therefore, pump 14a, 14b can affect brake-pressure, can brake-pressure be connected to the expansion tank/master cylinder as holder by the multiple switching valve of entrance side (multi changeover valve) 12, and can brake-pressure be finally connected to drg 18a to 18d at outlet side, wherein, can be that each independent drg 18a to 18d regulates pressure by electromagnetic valve.In this configuration, stop hydraulic fluid to enter the counter-flow in holder region by boiler check valve.
This situation is illustrated in Fig. 2, intervenes for the ESC to front-wheel.Have low pressure circuit (the pump 14a of activation, the entrance side of 14b) represent with grey, and the circuit with overvoltage highlights a little with runic.
By the method according to this invention, as shown at Fig. 2, be provided with comparative valve structure (comparable valve configuration), wherein, all drgs in two loops are preferably acted on by high pressure as described above simultaneously.
According to the available output of the driving motor 16 of pump 14a, 14b, carry out serially the force applications to two brake circuits, but other loop is all hydraulic connecting, so that is subjected to low resistance at this every pump 14a or 14b.
As previously mentioned, in order to carry out the method according to this invention, by the menucommand of external control signal or automotive servicing menu, use common drive electrical motor 16 to activate pump 14a and for example fixed time section of 20 seconds of 14b, to accumulate for example high static pressure of about 200bar in by the assembly of the brake system that this pressure acted on.
The manually opened blow off valve (attached not shown) providing at the pipe end of any brake system in principle is not opened in program according to the present invention, so that place near the steps program can automatically be carried out in the situation that there is no manual intervention or monitoring.
Series of experiments shows, by the method, can realize the improvement of the exhaust degree of brake system, and this is in long-term basis.
Its effect is found out from the chart of Fig. 3.The figure shows the comparison (in any unit) of pedal travel, it is essential for the concrete braking force for many vehicles and relevant standard deviation.Can find out, before carrying out the method according to this invention, after (left side) and execution the method (the right), observed reading is different significantly.That is, pedal stroke is totally less, and stands the fluctuation obviously reducing.
The positive related effect of the method is, has tested the air-tightness of brake system simultaneously, and reason is that any leakage all will be apparent under this pressure.
Claims (9)
1. the method at least a portion exhaust of the hydraulic brake system to vehicle, brake system comprises at least one brake circuit, can in this loop, optionally increase pressure by least one electric motor driven pumping plant (14a, 14b), it is characterized in that, in the situation that not opening blow off valve, use pumping plant (14a, 14b) to increase the step of the time period that pressure specifies to part brake system that will exhaust.
2. method according to claim 1, it is characterized in that, at least one pump (14a, 14b) is used as electric motor driven pumping plant, be equipped with this pumping plant in the process of carrying out brake regulation by electronic Dynamic Ride Control System in brake system cumulative stress (ESC pump).
3. method according to claim 1 and 2, is characterized in that, applies to be greater than 50bar, to be preferably more than 100bar, to be particularly preferably and to be greater than 180 to 200bar pressure using the pressure as increasing.
4. according to the method described in any one in claims 1 to 3, it is characterized in that, in stationary vehicle situation, apply the pressure special time period of increase, this time period was at least 5 seconds and be less than 2 minutes, was preferably at least 10 seconds and was less than 1 minute, was particularly preferably approximately 10 to 20 seconds.
5. according to the method described in any one in claim 1 to 4, it is characterized in that, implement exhaust process for the part brake system that can be placed under the pressure of increase by means of the suitable location of at least one pumping plant (14a, 14b) the control cock by brake system.
6. according to the method described in any one in claim 1 to 5, it is characterized in that, exhaust process, carrying out soon after filling liquid hydraulic fluid for the first time to brake system, is preferably carried out in the production process of the vehicle that comprises brake system.
7. according to the method described in any one in claim 2 to 6, it is characterized in that, vehicle comprises electronic brake controller, it is connected with the CAN bus in vehicle, and can control at least one electronic ESC pump (14a, 14b) with multiple brake system control cock, wherein, by means of the peripheral control unit that is connected to brake controller via CAN bus, cause exhaust process by following steps, start at least one ESC pump (14a, 14b) and the control cock of brake system is set to accumulate required pump pressure in the part brake system that can keep pressure.
8. method according to claim 7, is characterized in that, can carry out to cause selectively or extraly exhaust process with the maintenance menu in vehicle.
9. one kind for having the brake system controller of vehicle of brake system, this brake system has dynamic Ride Control System and at least one the hydraulic fluid pump (14a for dynamic Ride Control System, 14b), it is characterized in that, controller can drive at least one pump (14a, 14b), and can control the valve being provided in brake system, so that at least one pump (14a, 14b) exert pressure at least a portion of brake system, wherein, for being designed to activate at least one pump (14a to the controller of brake system exhaust, the time period of 14b) specifying, and in the situation that not opening blow off valve at least a portion of brake system the pressure of cumulative rises.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012221209 | 2012-11-20 | ||
| DE102012221209.4 | 2012-11-20 |
Publications (2)
| Publication Number | Publication Date |
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| CN103832426A true CN103832426A (en) | 2014-06-04 |
| CN103832426B CN103832426B (en) | 2019-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310586936.2A Active CN103832426B (en) | 2012-11-20 | 2013-11-20 | The method and brake system controller for being vented hydraulic vehicle brake system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103832426B (en) |
| DE (1) | DE102013223363A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104228809A (en) * | 2014-09-18 | 2014-12-24 | 吉林大学 | Exhaust gear applied to automotive hydraulic braking system and control method |
| CN106080576A (en) * | 2016-06-07 | 2016-11-09 | 上汽通用汽车有限公司 | Evacuation and the method for filling and anti-blocking brake system |
| CN106585607A (en) * | 2015-10-14 | 2017-04-26 | 福特全球技术公司 | Wheel brake cylinder residual-air monitor and associated method |
| CN111284471A (en) * | 2018-12-06 | 2020-06-16 | 罗伯特·博世有限公司 | Method for checking current faults of electronically sliding-adjustable brake systems of motor vehicles |
| CN112477836A (en) * | 2020-11-27 | 2021-03-12 | 东风汽车集团有限公司 | Brake system liquid feeding and exhausting control method based on electronic stability control system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015224888A1 (en) * | 2015-12-10 | 2017-06-14 | Volkswagen Aktiengesellschaft | Method and electronic service device for effecting the bleeding of a vehicle brake system |
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| CN1244162A (en) * | 1996-12-23 | 2000-02-09 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method for bubble-free filling of brake fluid into a hydraulic motor vehicle braking system |
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| DE10347789A1 (en) * | 2003-10-14 | 2005-05-12 | Bosch Gmbh Robert | Method for venting a hydraulic brake system |
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| DE19603867A1 (en) | 1996-02-03 | 1997-08-07 | Bosch Gmbh Robert | Motor vehicle brake monitoring method |
| DE10103229B4 (en) | 2001-01-25 | 2004-08-05 | Robert Bosch Gmbh | Hydraulic vehicle brake system and method for the detection of gas bubbles in a hydraulic vehicle brake system |
| DE102009024441A1 (en) | 2009-06-10 | 2010-12-16 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Bleeding method for a closed hydraulic system uses a hydraulic fluid to control/trigger a slave cylinder without any flow-back by applying pressure and low-frequency vibration to the hydraulic fluid |
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2013
- 2013-11-15 DE DE201310223363 patent/DE102013223363A1/en active Pending
- 2013-11-20 CN CN201310586936.2A patent/CN103832426B/en active Active
Patent Citations (5)
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| CN1244162A (en) * | 1996-12-23 | 2000-02-09 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method for bubble-free filling of brake fluid into a hydraulic motor vehicle braking system |
| US6196365B1 (en) * | 1998-07-01 | 2001-03-06 | Nissin Kogyo Co., Ltd. | Braking hydraulic pressure control apparatus and method of use for vehicle |
| US20040040807A1 (en) * | 2000-11-23 | 2004-03-04 | Jochen Burgdorf | Method for operating an electronically controllable brake actuation system, and electronically controlable brake actuation system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104228809A (en) * | 2014-09-18 | 2014-12-24 | 吉林大学 | Exhaust gear applied to automotive hydraulic braking system and control method |
| CN106585607A (en) * | 2015-10-14 | 2017-04-26 | 福特全球技术公司 | Wheel brake cylinder residual-air monitor and associated method |
| CN106080576A (en) * | 2016-06-07 | 2016-11-09 | 上汽通用汽车有限公司 | Evacuation and the method for filling and anti-blocking brake system |
| CN106080576B (en) * | 2016-06-07 | 2019-12-31 | 上汽通用汽车有限公司 | Vacuumizing and filling method and anti-lock braking system |
| CN111284471A (en) * | 2018-12-06 | 2020-06-16 | 罗伯特·博世有限公司 | Method for checking current faults of electronically sliding-adjustable brake systems of motor vehicles |
| CN111284471B (en) * | 2018-12-06 | 2024-03-08 | 罗伯特·博世有限公司 | Method for checking the current failure of an electronically slip-adjustable brake system of a motor vehicle |
| CN112477836A (en) * | 2020-11-27 | 2021-03-12 | 东风汽车集团有限公司 | Brake system liquid feeding and exhausting control method based on electronic stability control system |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102013223363A1 (en) | 2014-05-22 |
| CN103832426B (en) | 2019-09-17 |
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