CN204077641U - A kind of brake system of car pedal stroke simulator - Google Patents
A kind of brake system of car pedal stroke simulator Download PDFInfo
- Publication number
- CN204077641U CN204077641U CN201420477391.1U CN201420477391U CN204077641U CN 204077641 U CN204077641 U CN 204077641U CN 201420477391 U CN201420477391 U CN 201420477391U CN 204077641 U CN204077641 U CN 204077641U
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- Prior art keywords
- spring
- brake system
- liquid
- stroke simulator
- pedal stroke
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- 239000007788 liquid Substances 0.000 claims abstract description 23
- 239000010985 leather Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000001172 regenerating effect Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- Regulating Braking Force (AREA)
Abstract
The utility model relates to a kind of brake system of car pedal stroke simulator, belongs to brake system of car parts.Nonreturn valve core, unidirectional valve spring are arranged in the bypass between inlet and liquid-storing cavity, with normally closed solenoid valve modules in parallel, piston, little spring, spring Connection Block, big spring, cylinder cap are connected successively, between piston and spring Connection Block, buffer bar is installed, between spring Connection Block and cylinder cap, bump rubber is installed, at the sidewall connected pipes joint of spring cavity, oil connector is connected with the discharge outlet of the liquid storing cup of braking liquid by braking liquid flexible pipe.Advantage is: novel structure, and during brake off, liquid-storing cavity braking liquid can get back to master brake cylinder rapidly through check valve, ready for braking next time.Piston stroke is divided between two stiffness region, consistent with the brake system pedal sense of band vacuum booster.Spring cavity does not communicate with air, and dust-proof effect significantly improves.Have no abnormal sound in pedal stroke simulator working process.
Description
Technical field
The utility model belongs to brake system of car parts, is applied in battery-driven car and oil and electricity hybrid vehicle regenerative braking energy reclaiming system.
Background technology
Pedal stroke simulator is the critical component of battery-driven car and oil and electricity hybrid vehicle regenerative braking energy reclaiming system.Its radical function is: in the process that light brake and medium tenacity are braked, the braking liquid of being discharged by master brake cylinder absorbs, make brake pedal produce certain stroke and produce certain hydraulic coupling, make the pedal sense of driver consistent with the Conventional braking systems of common band vacuum servo apparatus, realize the decoupling zero function of master brake cylinder and brake wheel cylinder.Now, carry out regenerative braking by motor and carry out energy regenerating.During emergency braking, pedal stroke simulator normally closed solenoid valve is closed, and motor does not participate in braking, is directly braked by hydraulic machinery brake system.When electric brake system lost efficacy, pedal stroke simulator normally closed solenoid valve was closed, and master brake cylinder participates in braking directly, ensures the most basic service brake.
There is following shortcoming in current pedal stroke simulator: braking liquid viscosity increases when ambient temperatures are low, and it is comparatively large that braking liquid flows back to master brake cylinder resistance from pedal stroke simulator liquid-storing cavity by normally closed solenoid valve valve port, and backflow slowly.Vacuum booster hollow travel stage pedal sense cannot be simulated.Spring cavity communicates with air, and dust easily enters, and causes liquid-storing cavity inwall dust deposit, the easy clamping stagnation of piston.Metal knock is had when pedal stroke emulator piston stroke arrives total travel.
Summary of the invention
The utility model provides a kind of pedal stroke simulator, is back to the idle travel that master brake cylinder resistance is comparatively large, backflow is slow, cannot simulate vacuum booster, the problem polluting, have metal knocking noise by dust in air to solve braking liquid from liquid-storing cavity.
The technical scheme that the utility model is taked is: normally closed solenoid valve assembly is fixedly connected with by attaching screw with cylinder body, cylinder body there is liquid outlet, inlet communicates with liquid-storing cavity through this normally closed solenoid valve assembly, it is characterized in that: nonreturn valve core, unidirectional valve spring is arranged in the bypass between inlet and liquid-storing cavity, with normally closed solenoid valve modules in parallel, turning adjusting screw is fixedly connected with nonreturn valve core, leather cup is arranged in the annular groove of piston, this piston one end is frustum, locate with contacting bottom liquid-storing cavity during confined state, there is an axial hole at piston other end center, be connected with the interference of buffer bar one end, little spring one end is connected with the shoulder interference of this piston, the other end is connected with the little shoulder interference of spring Connection Block, big spring one end is connected with the large shoulder interference of spring Connection Block, the other end is connected with the shoulder interference of cylinder cap, bump rubber is Rubber Parts, endoporus is connected with one end interference of spring Connection Block, during spring Connection Block confined state, outer rim end face contacts with cylinder body spring resonator end surface and locates, O RunddichtringO is adopted to seal between cylinder cap and cylinder body, cylinder cap one end is fixedly connected with cylinder body by collar, at the sidewall connected pipes joint of spring cavity, exhaust bolt leather cup with bottom liquid-storing cavity between be connected with liquid-storing cavity sidewall by tapped bore.
A kind of embodiment of the utility model is: described nonreturn valve core inside is metallic framework, and outside is rubber plastic conjunction, and sealing lip is rubber lip limit.
A kind of embodiment of the utility model is: this buffer bar is Rubber Parts, and the other end exceeds pistons end 2 ~ 3mm, in the assembled condition with spring Connection Block end clearance δ 1.
A kind of embodiment of the utility model is: described bump rubber exceeds spring Connection Block end 3 ~ 4mm, in the assembled condition with cylinder cap gap delta 2.
A kind of embodiment of the utility model is: described bump rubber two ends band is fluted.
The utility model has the advantage of: novel structure, during brake off, liquid-storing cavity braking liquid can get back to master brake cylinder rapidly through check valve, ready for braking next time.Piston stroke is divided between two stiffness region, consistent with the brake system pedal sense of band vacuum booster.Spring cavity does not communicate with air, and dust-proof effect significantly improves.Have no abnormal sound in pedal stroke simulator working process.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is piston 3 displacement and liquid-storing cavity 21 hydraulic pressure graph of relation in Fig. 1;
Fig. 3 is the cross section view of nonreturn valve core 15 in Fig. 1;
Fig. 4 is the three-dimensional view of bump rubber 10 in Fig. 1.
Detailed description of the invention
Normally closed solenoid valve assembly 1 is fixedly connected with by attaching screw 20 with cylinder body 19, cylinder body 19 there is liquid outlet 14, inlet 18 communicates with liquid-storing cavity 21 through this normally closed solenoid valve assembly 1, inlet 18 is connected by brake piping with a chamber of master brake cylinder, nonreturn valve core 15, unidirectional valve spring 16 is arranged in the bypass between inlet 18 and liquid-storing cavity 21, in parallel with normally closed solenoid valve assembly 1, turning adjusting screw 17 is fixedly connected with nonreturn valve core, turning adjusting screw 17 can regulate the response pressure of check valve, nonreturn valve core 15 inside is metallic framework, outside is rubber plastic conjunction, sealing lip 23 is rubber lip limit, under little pressure can with cylinder body 19 check valve hole end surface positiver sealing, during brake off, the drag that liquid-storing cavity 21 inside brake liquid can overcome unidirectional valve spring 16 is got back to rapidly in brake piping,
Leather cup 2 is arranged in the annular groove of piston 3, this piston 3 one end is frustum, locate with contacting bottom liquid-storing cavity 21 during confined state, there is an axial hole at piston 3 other end center, hole base diameter diminishes, be connected with buffer bar 12 one end interference, this buffer bar 12 is Rubber Parts, the other end exceeds piston 3 end 2 ~ 3mm, in the assembled condition with spring Connection Block 6 end clearance δ 1, little spring 4 one end is connected with the shoulder interference of this piston 3, the other end is connected with the little shoulder interference of spring Connection Block 6, big spring 5 one end is connected with the large shoulder interference of spring Connection Block 6, the other end is connected with the shoulder interference of cylinder cap 8, bump rubber 10 is Rubber Parts, endoporus is connected with one end interference of spring Connection Block 6, and exceed spring Connection Block 6 end 3 ~ 4mm, in the assembled condition with cylinder cap 8 gap delta 2, bump rubber 10 two ends band fluted 24, prevent bump rubber 10 compress after and cylinder cap 8 produce enclosure space, when causing piston 3 travelling backwards, bump rubber 10 is not separated with cylinder cap 8.During spring Connection Block 6 confined state, outer rim end face and cylinder body 19 spring cavity 22 end contact are located,
Adopt O RunddichtringO 7 to seal between cylinder cap 8 and cylinder body 19, cylinder cap 8 one end is fixedly connected with cylinder body 19 by collar 9, and at the sidewall connected pipes joint 11 of spring cavity 22, oil connector 11 is connected with the discharge outlet of the liquid storing cup of master brake cylinder by braking liquid flexible pipe.Exhaust bolt 13 leather cup 2 with bottom liquid-storing cavity 21 between be connected with liquid-storing cavity 21 sidewall by tapped bore.
Principle of work: the inlet of pedal stroke simulator is connected with master brake cylinder one chamber, and liquid outlet is connected with hydraulic control unit, by air in exhaust bolt emptying liquid-storing cavity.
When chaufeur steps on brake pedal, control unit is judged as light brake or medium tenacity braking, and brake system adopts motor to carry out regenerative braking, and carries out energy regenerating simultaneously.The pipeline controlled unit of leading to brake wheel cylinder is cut off, and normally closed solenoid valve assembly 1 is energized, and electromagnetic valve is opened, and braking liquid enters pedal stroke simulator by inlet 18, and braking liquid enters liquid-storing cavity 21 by normally closed solenoid valve, promotes piston 3 and moves.First stage: little spring 4 and big spring 5 are compressed simultaneously, and the rigidity of little spring 4 and big spring 5 is stiffness at the end K1.Piston 3 continues mobile, and buffer bar 12 exceeds piston 3 end face part with spring Connection Block 6 end contact and compressed, and plays the effect contacting noise reduction.When piston 3 end face and spring Connection Block 6 end contact, first stage terminates, the pedal sense of the hollow travel stage of first stage simulation vacuum booster.Subordinate phase: piston 3 continues mobile, little spring 4 is no longer compressed, the rigidity of spring is the stiffness K 2 of big spring 5, piston 3 continues mobile, bump rubber 10 and cylinder cap 8 end contact, bump rubber 10 compresses, until spring Connection Block 6 end face and piston 3 end contact, piston 3 stops mobile, pedal sense after subordinate phase simulation vacuum booster idle travel terminates, in the process of piston 3 movement backward, spring cavity 22 smaller volume, the braking liquid of spring cavity 22 flows in liquid storing cup through oil connector 11, and piston 3 displacement and liquid-storing cavity 21 hydraulic pressure relation curve are shown in Fig. 2.
During brake off, piston 3 travelling backwards under spring resistance effect, the liquid of liquid-storing cavity 21 is got back to rapidly in brake system by check valve, ready for braking next time, and spring cavity 22 volume becomes large, and produce negative pressure, the braking liquid in liquid storing cup is back to spring cavity 22.
When chaufeur push down on the pedal, when electronic control unit is judged as emergency braking, normally closed solenoid valve assembly 1 no power, brake system is conventional hydraulic mechanical braking, and pedal stroke simulator does not work.
When electronic control unit failure, normally closed solenoid valve is closed, and brake system is conventional hydraulic mechanical braking.
Claims (9)
1. a brake system of car pedal stroke simulator, normally closed solenoid valve assembly is fixedly connected with by attaching screw with cylinder body, cylinder body there is liquid outlet, inlet communicates with liquid-storing cavity through this normally closed solenoid valve assembly, it is characterized in that: nonreturn valve core, unidirectional valve spring is arranged in the bypass between inlet and liquid-storing cavity, with normally closed solenoid valve modules in parallel, turning adjusting screw is fixedly connected with nonreturn valve core, leather cup is arranged in the annular groove of piston, this piston one end is frustum, locate with contacting bottom liquid-storing cavity during confined state, there is an axial hole at piston other end center, be connected with the interference of buffer bar one end, little spring one end is connected with the shoulder interference of this piston, the other end is connected with the little shoulder interference of spring Connection Block, big spring one end is connected with the large shoulder interference of spring Connection Block, the other end is connected with the shoulder interference of cylinder cap, bump rubber is Rubber Parts, endoporus is connected with one end interference of spring Connection Block, during spring Connection Block confined state, outer rim end face contacts with cylinder body spring resonator end surface and locates, O RunddichtringO is adopted to seal between cylinder cap and cylinder body, cylinder cap one end is fixedly connected with cylinder body by collar, at the sidewall connected pipes joint of spring cavity, exhaust bolt leather cup with bottom liquid-storing cavity between be connected with liquid-storing cavity sidewall by tapped bore.
2. a kind of brake system of car pedal stroke simulator according to claim 1, is characterized in that: described nonreturn valve core inside is metallic framework, and outside is rubber plastic conjunction, and sealing lip is rubber lip limit.
3. a kind of brake system of car pedal stroke simulator according to claim 1 and 2, is characterized in that: this buffer bar is Rubber Parts, and the other end exceeds pistons end 2 ~ 3mm, in the assembled condition with spring Connection Block end clearance δ 1.
4. a kind of brake system of car pedal stroke simulator according to claim 1 and 2, is characterized in that: described bump rubber exceeds spring Connection Block end 3 ~ 4mm, in the assembled condition with cylinder cap gap delta 2.
5. a kind of brake system of car pedal stroke simulator according to claim 3, is characterized in that: described bump rubber exceeds spring Connection Block end 3 ~ 4mm, in the assembled condition with cylinder cap gap delta 2.
6. a kind of brake system of car pedal stroke simulator according to claim 1 and 2, is characterized in that: described bump rubber two ends band is fluted.
7. a kind of brake system of car pedal stroke simulator according to claim 3, is characterized in that: described bump rubber two ends band is fluted.
8. a kind of brake system of car pedal stroke simulator according to claim 4, is characterized in that: described bump rubber two ends band is fluted.
9. a kind of brake system of car pedal stroke simulator according to claim 5, is characterized in that: described bump rubber two ends band is fluted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420477391.1U CN204077641U (en) | 2014-08-24 | 2014-08-24 | A kind of brake system of car pedal stroke simulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420477391.1U CN204077641U (en) | 2014-08-24 | 2014-08-24 | A kind of brake system of car pedal stroke simulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204077641U true CN204077641U (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420477391.1U Expired - Fee Related CN204077641U (en) | 2014-08-24 | 2014-08-24 | A kind of brake system of car pedal stroke simulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204077641U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129379A (en) * | 2014-08-24 | 2014-11-05 | 吉林东光奥威汽车制动系统有限公司 | Pedal travel simulator for automobile brake system |
-
2014
- 2014-08-24 CN CN201420477391.1U patent/CN204077641U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104129379A (en) * | 2014-08-24 | 2014-11-05 | 吉林东光奥威汽车制动系统有限公司 | Pedal travel simulator for automobile brake system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 |