CN204415367U - A kind of ABS system - Google Patents
A kind of ABS system Download PDFInfo
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- CN204415367U CN204415367U CN201420852434.XU CN201420852434U CN204415367U CN 204415367 U CN204415367 U CN 204415367U CN 201420852434 U CN201420852434 U CN 201420852434U CN 204415367 U CN204415367 U CN 204415367U
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- wheel cylinder
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- pump
- normally open
- open valve
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- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The utility model discloses a kind of ABS system, make the oil of a pipeline not by wheel cylinder (8) based on ABS normally open valve (2) thus the brake piping inefficacy realized, under the prerequisite not destroying original pipeline, carry out pipeline failure test, integrate ABS function and service brake pipeline failure testing, while increasing function, do not increase cost; Communication by means of only bus and ECU can realize service brake pipeline failure testing and ABS function switches, convenient and swift.
Description
Technical field
The utility model belongs to automobile pipeline technical field, particularly relates to a kind of ABS system.
Background technology
Performance requriements after service brake inefficacy and failure test occupy critical role in ECE brake legislation system, are also the Focal point and difficult points of automobile brake test.Brake piping lost efficacy---be applicable to all brake systems.For reaching emergency brake performance, all vehicles all must adopt double loop structure.Energy supplying pipeline is also adopted to the force aid system/power system of double loop/discrete loop structure, transfer conduit occurs to lose efficacy and will the energy storage of its upstream be caused to completely lose, and consequence lost efficacy even more serious than energy supplying pipeline.Therefore, pipeline lost efficacy and the pressure durations of a wherein pipeline is zero.When carrying out pipeline failure test, the pressure durations of pipeline is only needed to be zero.When carrying out pipeline failure test, only lost efficacy, the whole energy then getting rid of inefficacy pipe line downstream accumulator also can reach similar effect.At present, a partial failure of simulated driving brake system, makes the line pressure in inefficacy loop in whole process of the test, remain zero and mainly takes following several practice:
A) by " inefficacy valve ", valve control loop and fluid reservoir loop is opened (ISO, VCA method) mutually;
B) in a loop, install shutoff valve makes drg and master cylinder part disconnect.Should unclamp at driving braking force control system and at least close shutoff valve (ISO method) after 1s.
C) Exhaust screw directly unclamping a wherein pipeline clamp place makes itself and air open-minded.
Realizing in process of the present utility model, utility model people finds that prior art at least exists following problem: the method for manually unclamping air bleed screw needs manually to unclamp, air bleed screw of screwing on, comparatively trouble and can not ensure do not have gas to enter brake piping in the process of test; The method installing triple valve at brake piping additional needs to change a social system original brake piping, and work capacity is large and destroy original brake piping, its complicated operation, and need external pipeline and valve, not only destroy original pipeline, dismounting also can consume a large amount of manpower and man-hour.Braking liquid can be caused to leak for directly pulling out the method that wherein pipeline makes itself and air open, considering from experimental safe, should avoid using as far as possible.
Utility model content
Under technical problem to be solved in the utility model being to provide a kind of prerequisite not destroying original pipeline, reducing manpower and man-hour to greatest extent, and avoiding the safety hazard because pipeline dismounting causes, carrying out the ABS system of pipeline failure test.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of ABS system, comprise electronic control unit ECU and actuating unit HCU, HCU comprises normally open valve, normally closed valve, energy storage and pump, and unify brake pedal, vacuum booster, master cylinder and wheel cylinder of anti-lock braking system constitutes whole brake system;
After the braking oil pressure that brake pedal produces is amplified by vacuum booster, the braking liquid with pressure is sent into master cylinder;
Described normally open valve, normally closed valve, energy storage and pump are connected successively by pipeline and are connected to a formation hydraulic circuit on master cylinder, and described normally open valve, normally closed valve and pump are all controlled by ECU;
Described wheel cylinder is for driving wheel braking mechanism, and wheel cylinder is connected on the pipeline between normally open valve and normally closed valve by pipeline;
Normally open valve is for realizing the inefficacy of brake piping.
Oil circuit has four branch roads, and every bar branch road includes a normally open valve, a normally closed valve, energy storage, a pump and a wheel cylinder, and four wheel cylinders are respectively left front wheel cylinder, right back wheel cylinder, left back wheel cylinder and right front wheel cylinder.
Two-way branch road shares an energy storage and a pump.
The branch road of left front wheel cylinder and right back wheel cylinder shares an energy storage and a pump, and the branch road of left back wheel cylinder and right front wheel cylinder shares an energy storage and a pump.
A technical scheme tool in technique scheme has the following advantages or beneficial effect, based on ABS system, do not need to carry out any pipeline transformation of the way, only need to send brake piping disable command by bus communication (K/CAN) to ABS assembly, vehicle simulating brake pipeline failure phenomenon when braking can be enable, eliminate the interference of external factor to test, add the reliability of test; Method simple and fast, the simulation that can realize pipeline was fast and accurately lost efficacy, cost-saving and energy.Considerably increase the safety of test.And this function accessible site is in ABS system.
Accompanying drawing explanation
The fundamental diagram that during braking that Fig. 1 is the ABS system that provides in the utility model embodiment, the near front wheel and off hind wheel pipeline lost efficacy;
Fig. 2 is the pressurized state fundamental diagram that antiblock device normally works;
Fig. 3 is the packing state fundamental diagram that antiblock device normally works;
Fig. 4 is the pressure release operation schematic diagram that antiblock device normally works;
Mark in above-mentioned figure is: 1, master cylinder, and 2, normally open valve, 3, normally closed valve, 4, vacuum booster, 5, brake pedal, 6, energy storage, 7, pump, 8, wheel cylinder.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
A kind of antiblock device, comprise ECU (Vehicle Electronic Control Unit) and ABS (anti-skid brake system) actuating unit HCU, HCU comprises normally open valve 2, normally closed valve 3, energy storage 6 and pump 7, and unify brake pedal 5, vacuum booster 4, master cylinder 1 and wheel cylinder 8 of anti-lock braking system constitutes whole brake system;
Chaufeur pin is stepped on brake pedal 5 and is produced braking oil pressure, and after being amplified by vacuum booster 4, the braking liquid with pressure flows into master cylinder 1.
Normally open valve 2, normally closed valve 3, energy storage 6 and pump 7 are connected successively by pipeline and are connected to a formation hydraulic circuit on master cylinder 1, and normally open valve 2, normally closed valve 3 and pump 7 are all controlled by ECU;
Wheel cylinder 8 is for driving wheel braking mechanism, and wheel cylinder 8 is connected on the pipeline between normally open valve 2 and normally closed valve 3 by pipeline;
Normally open valve 2 is for realizing the inefficacy of brake piping.
Have four branch roads, every bar branch road includes a normally open valve 2, normally closed valve 3, energy storage 6, pump 7 and a wheel cylinder 8, four wheel cylinders 8 are respectively left front wheel cylinder, right back wheel cylinder, left back wheel cylinder and right front wheel cylinder.
Two-way branch road shares an energy storage 6 and a pump 7, forms X-type and arranges, namely the near front wheel brake circuit and off hind wheel brake circuit share LPA, pump 7 and a master cylinder outlet mouth, and two other brake circuit shares LPA, pump 7 and a master cylinder outlet mouth.
The branch road of left front wheel cylinder and right back wheel cylinder shares an energy storage 6 and a pump 7, and the branch road of left back wheel cylinder and right front wheel cylinder shares an energy storage 6 and a pump 7.
Above-mentioned ABS system carries out a method for service brake pipeline failure test, comprises the steps:
1) determine to need to carry out the pipeline of testing that lost efficacy;
2) by the ECU transmission service brake pipeline failure testing order of communication bus to ABS system, ABS system response test command closes the normally open valve 2 of corresponding brake piping, and sends the buttoned-up status signal of this normally open valve 2 to communication bus;
3) oil in master cylinder 1 cannot enter wheel cylinder 8 by normally open valve 2, realizes service brake pipeline and loses efficacy, now can carry out brake piping failure testing.
After the 3rd step, after having tested, exit the control to ABS, the normally open valve 2 of corresponding brake piping can be opened, and terminates test.
In step 2, normally open valve 2 is controlled by ECU.
ABS system (anti-skid brake system) is made up of ECU (Vehicle Electronic Control Unit) and HCU (ABS actuating unit) two parts, and wherein HCU comprises normally open valve NO, normally closed valve NC, low pressure accumulator LPA, motor M, pump 7 and check valve.HCU adopts X-type design, and namely the near front wheel brake circuit and off hind wheel brake circuit share LPA, pump 7 and master cylinder 1 oil outlet, and two other brake circuit shares LPA, pump 7 and master cylinder 1 oil outlet, and four brake circuits share a motor.
Be integrated with ABS function and service brake pipeline failure testing function, wherein ABS system fading margin process comprises pressurization, pressure maintaining period, decompression process.ABS system boost process, as shown in Figure 1, for the near front wheel, after chaufeur steps on brake pedal 5, now normally open valve 2 is opened, and normally closed valve 3 cuts out, braking liquid flows into brake piping by master cylinder 1, through normally open valve 2, at normally closed valve 3, place cannot pass through, and in the near front wheel drg FL, finally produces brake-pressure promote brake; ABS system pressure maintaining period, as shown in Figure 2, for the near front wheel, closes normally open valve 2, and normally closed valve 3 continues to keep closed condition, and left front pressure of wheel braking cylinder is kept; ABS system decompression process, as shown in Figure 3, for the near front wheel, normally open valve 2 keeps closed condition, now opens normally closed valve 3, and the braking liquid in the near front wheel wheel cylinder flows into LPA through normally closed valve 3, and the braking liquid be stored in LPA is withdrawn into master cylinder 1 by with pump 7.
The realization of service brake pipeline failure testing is based on ABS assembly, tester is by the ECU transmission service brake pipeline failure testing order of communication bus (K/CAN) to ABS system, ABS system response test command closes the normally open valve 2 of corresponding brake piping, and send the buttoned-up status signal of this normally open valve 2 to communication bus, now tester can carry out brake piping failure testing.As Fig. 1, lost efficacy for the near front wheel and off hind wheel service brake pipeline, now normally open valve 2 and normally open valve 2 are closed, when tester steps on brake pedal 5, braking liquid in master cylinder 1 cannot flow into left front wheel cylinder FL and right back wheel cylinder RR by normally open valve 2 and normally open valve 2, check valve, and the brake oil flow of other pipeline is normal, thus realize the near front wheel and off hind wheel service brake pipeline failure testing.After test completes, tester sends to ABS system and recovers order, and ABS system opens the normally open valve 2 of corresponding brake piping, and sends to communication bus the status signal that this normally open valve 2 opened.When ABS system reply signal of communication show each brake piping normally open valve 2 be all in opening time, can terminate test.FL, RR, RL, FR refer to left front, right back, left back, right front wheel cylinder respectively.
After adopting above-mentioned scheme, based on ABS system, do not need to carry out any pipeline transformation of the way, only need to send brake piping disable command by bus communication K/CAN to ABS assembly, vehicle simulating brake pipeline failure phenomenon when braking can be enable, eliminate the interference of external factor to test, add the reliability of test; Method simple and fast, the simulation that can realize pipeline was fast and accurately lost efficacy, cost-saving and energy.Considerably increase the safety of test.And this function accessible site is in ABS system.Integrate ABS function and service brake pipeline failure testing, while increasing function, do not increase cost; Communication by means of only bus and ECU can realize service brake pipeline failure testing and ABS function switches, convenient and swift.
By reference to the accompanying drawings the utility model is exemplarily described above; obvious the utility model specific implementation is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that method of the present utility model is conceived and technical scheme is carried out; or design of the present utility model and technical scheme directly applied to other occasion, all within protection domain of the present utility model without to improve.
Claims (4)
1. an ABS system, it is characterized in that, comprise electronic control unit ECU and actuating unit HCU, HCU comprises normally open valve (2), normally closed valve (3), energy storage (6) and pump (7), and unify brake pedal (5), vacuum booster (4), master cylinder (1) and wheel cylinder (8) of anti-lock braking system constitutes whole brake system;
After the braking oil pressure that brake pedal (5) produces is amplified by vacuum booster (4), the braking liquid with pressure is sent into master cylinder (1);
Described normally open valve (2), normally closed valve (3), energy storage (6) and pump (7) are connected successively by pipeline and are connected to the upper formation hydraulic circuit of master cylinder (1), and described normally open valve (2), normally closed valve (3) and pump (7) are all controlled by ECU;
Described wheel cylinder (8) is for driving wheel braking mechanism, and wheel cylinder (8) is connected on the pipeline between normally open valve (2) and normally closed valve (3) by pipeline;
Normally open valve (2) is for realizing the inefficacy of brake piping.
2. ABS system as claimed in claim 1, it is characterized in that, have four branch roads, every bar branch road includes a normally open valve (2), a normally closed valve (3), energy storage (6), a pump (7) and a wheel cylinder (8), and four wheel cylinders (8) are respectively left front wheel cylinder, right back wheel cylinder, left back wheel cylinder and right front wheel cylinder.
3. ABS system as claimed in claim 2, is characterized in that, two-way branch road shares an energy storage (6) and a pump (7).
4. ABS system as claimed in claim 3, it is characterized in that, the branch road of left front wheel cylinder and right back wheel cylinder shares an energy storage (6) and a pump (7), and the branch road of left back wheel cylinder and right front wheel cylinder shares an energy storage (6) and a pump (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420852434.XU CN204415367U (en) | 2014-12-29 | 2014-12-29 | A kind of ABS system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420852434.XU CN204415367U (en) | 2014-12-29 | 2014-12-29 | A kind of ABS system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204415367U true CN204415367U (en) | 2015-06-24 |
Family
ID=53465761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420852434.XU Active CN204415367U (en) | 2014-12-29 | 2014-12-29 | A kind of ABS system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204415367U (en) |
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2014
- 2014-12-29 CN CN201420852434.XU patent/CN204415367U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 241009 Wuhu economic and Technological Development Zone, Anhui, No. 19 Taishan Road Patentee after: WUHU BOTELI AUTOMOBILE SAFETY SYSTEM CO., LTD. Address before: 241009 Wuhu economic and Technological Development Zone, Anhui, No. 19 Taishan Road Patentee before: Wuhu Bethel Automotive Secure Systems Ltd. |