CN101716890B - Composite braking system - Google Patents
Composite braking system Download PDFInfo
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- CN101716890B CN101716890B CN2009102374817A CN200910237481A CN101716890B CN 101716890 B CN101716890 B CN 101716890B CN 2009102374817 A CN2009102374817 A CN 2009102374817A CN 200910237481 A CN200910237481 A CN 200910237481A CN 101716890 B CN101716890 B CN 101716890B
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- 239000002131 composite material Substances 0.000 title claims abstract description 18
- 238000013016 damping Methods 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 9
- 238000011084 recovery Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000006096 absorbing agent Substances 0.000 abstract 1
- 230000005611 electricity Effects 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
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Abstract
The invention relates to a composite braking system, which comprises a hydraulic braking system consisting of a brake pedal, a vacuum booster, a braking main cylinder, a hydraulic adjustment module, a braking wheel cylinder, a pressure sensor, a wheel speed sensor and a braking controller and a motor braking system, and is characterized in that: a push rod between the brake pedal and the vacuum booster is provided with a shock absorber; main valves are arranged on oil pipes on which two liquid inlets of the pressure hydraulic adjustment module are positioned respectively; the vacuum input end of the vacuum booster is provided and connected with a vacuum supply module; the vacuum supply module comprises a vacuum pump, a direct current motor, a pressure relay and a power supply; the output end of the vacuum pump is connected with both the vacuum input end of the vacuum booster and the reference pressure input end of the pressure relay through pipes; the output end of the pressure relay is connected with the input end of the direct current motor; the direct current motor is electrically connected with the vacuum pump; and the power supply supplies power to the direct current motor and the pressure relay. The system requires few changes in the hydraulic breaking system of an original vehicle, and can realize series braking energy recovery, guarantee a good brake pedal feel and be widely used in breaking energy recovery systems of electricity-driven vehicles.
Description
Technical field
The present invention relates to a kind of motor vehicle braking system, particularly about a kind of composite braking system.
Background technology
Current, under the dual-pressure of the energy and environment, engendered novel energy-saving environment-friendly automobiles such as comprising hybrid-power electric vehicle, pure electric automobile and fuel-cell vehicle.Above-mentioned energy-conserving and environment-protective vehicle all has motor and storage battery or super capacitor, can the kinetic energy of vehicle be converted into power storage in storage battery or super capacitor by motor at glancing impact.In general, the recovery lock torque that motor provides can't satisfy the car brakeing demand, therefore the energy-conserving and environment-protective vehicle has also kept original hydraulic brake system or Pneumatic braking system, vehicle acts on simultaneously at glancing impact hydraulic brake system or Pneumatic braking system and motor braking system like this, and the system of this The combined braking is called composite braking system.Composite braking system will be taken into account braking safety, brake feel, needs to reclaim as much as possible braking energy simultaneously.Under different storage battery state-of-charge, bus voltage and motor speeds, the lock torque that motor can provide has a great difference, therefore need control original hydraulic brake system.
By retrieval, there are following two China patent and the present invention that big correlativity is arranged.For example: the applying for a patent of Tsing-Hua University " series connection type brake system of hybrid power vehicle ", number of patent application is 200510001757, its principle of work is: in order to realize the tandem braking, increased hydraulic regulator between master brake cylinder and ABS hydraulic efficiency governing valve piece, the pressure of brake wheel cylinder is controlled by hydraulic regulator when carrying out the braking energy recovery; The pressure of master brake cylinder is controlled by brake pedal when not carrying out the braking energy recovery.The shortcoming of this technology mainly contains two: the one, and when carrying out when braking energy reclaims it being to cut off master brake cylinders by two two-position three-way valves to be connected, but be plugged owing to the outlet of master cylinder at this moment, thereby cause brake pedal to be operated with the oil circuit of brake wheel cylinder; The 2nd, whole brake system structure is comparatively complicated, changes bigger to the brake system of former car.The applying for a patent of Jilin University " hybrid power car regenerative brake and anti-lock integrated control system ", number of patent application is 200710055687.In the technical scheme of this patent, two outlets of master brake cylinder all directly communicate with brake wheel cylinder by the inlet valve of ABS hydraulic valve block, when therefore in the braking energy removal process, regulating the brake wheel cylinder brake-pressure, can cause master brake cylinder pressure than great fluctuation process, thereby cause the strenuous vibration of brake pedal, influence pedal sense.
Summary of the invention
At the problems referred to above, it is little to the purpose of this invention is to provide a kind of hydraulic brake system change to former car, and can realize that the tandem braking energy reclaims, and can guarantee the composite braking system of brake pedal feel preferably again.
For achieving the above object, the present invention takes following technical scheme: a kind of composite braking system, it comprises one by brake pedal, vacuum booster, master brake cylinder, the hydraulic efficiency governing module, brake wheel cylinder, pressure sensor, the hydraulic braking sysgtem that wheel speed sensors and brake controller the constitute motor braking system that unifies, it is characterized in that: have additional a bumper on the push rod between described brake pedal and the vacuum booster, have additional a main valve respectively on the oil circuit pipeline at two inlet places on the described pressure hydraulic efficiency governing module, the vacuum input end on the described vacuum booster is set up and is connected a vacuum feed module; Described vacuum feed module comprises a vacuum pump, a direct current motor, a pressure relay and a power supply, described vacuum delivery side of pump connects the vacuum input end on the described vacuum booster and the reference pressure input end of described pressure relay simultaneously by a pipeline, the mouth of described pressure relay connects the input end of described DC machine, described DC machine is electrically connected described vacuum pump, and described power supply is given described DC machine and pressure relay power supply.
Described bumper is a rubber block.
Described bumper is a spring.
Described bumper is a spring damping structure.
Described spring damping structure comprises that a bumper shell, has the piston of damping hole, a spring, a push rod and fluid, described piston, spring and fluid all are encapsulated in the described bumper shell, described spring connects described push rod, this push rod is captiveed joint with described vacuum booster, runs through described bumper shell with described brake pedal bonded assembly push rod and captives joint with described piston.
The present invention is owing to take above technical scheme, it has the following advantages: 1, because the present invention has additional a bumper on the brake assembly of existing composite braking system and the push rod between the vacuum booster, therefore when occurring the master cylinder pressure high-frequency vibration in the system, can make the vibrations of brake pedal alleviate and be reduced, thereby improve brake feel.2, because the present invention has additional a main valve respectively on the oil circuit pipeline at two inlet places of the pressure hydraulic efficiency governing module of existing composite braking system, therefore when carrying out braking energy recovery and speed of a motor vehicle step-down need reduce the motor braking torque time, just need open the near front wheel in the hydraulic efficiency governing module and the inlet valve of off front wheel, if in this process, close two main valves, the duty cycle of switching of the inlet valve of motor speed in the modulated pressure adjustment module and left and right front-wheel then can be realized brake pedal feel preferably simultaneously.3, because the present invention sets up the vacuum feed module that connection one is made up of vacuum pump, DC machine, pressure relay and power supply at the vacuum input end of vacuum booster, therefore pressure relay conducting when reference pressure is higher than setting value, DC machine drives vacuum pump work, when reference pressure during less than setting value pressure relay disconnect, DC machine quits work, and the degree of vacuum in the vacuum booster is maintained in the suitable scope.4, because the bumper that the present invention sets up can adopt a spring damping structure, can also adopt cheap spring or rubber block, therefore not only processing and manufacturing is simple, and with low cost.When 5, adopting the spring damping structure as bumper, can under the lower condition of the resonance frequency of guaranteeing bumper, adopt the spring of higher-strength, therefore guarantee that the stroke of bumper is less, thereby can obtain better brake pedal feel owing to the present invention.The present invention changes little to the hydraulic brake system of former car, can guarantee brake pedal feel preferably again, can be widely used in the brake energy recovering system of electro-motive vehicle.
Description of drawings
Fig. 1 is the structural representation of existing composite braking system
Fig. 2 is a structural representation of the present invention
Fig. 3 is the johning knot composition of first embodiment of bumper among the present invention
Fig. 4 is the johning knot composition of second embodiment of bumper among the present invention
Fig. 5 is the johning knot composition of the 3rd embodiment of bumper among the present invention
Fig. 6 is the structural representation of vacuum feed module among the present invention
The specific embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
The present invention has additional a bumper, a vacuum feed module and two main valves for realizing obtaining brake pedal feel preferably when the tandem braking energy reclaims on the basis of existing composite braking system.
As shown in Figure 1, existing composite braking system comprises a hydraulic brake system 1 and a motor braking system 2, motor braking system 2 is converted into electrical power storage by electric power generation in storage battery with a part of vehicle energy, and not enough braking force is provided by hydraulic brake system 1.
Wherein, existing hydraulic brake system 1 comprises a brake assembly 3, a vacuum booster 4, a master brake cylinder 5, a hydraulic efficiency governing module 6, four brake wheel cylinders 7, six pressure sensors 8, four-wheel speed sensors 9 and brake controller 10.Brake assembly 3 is made up of brake pedal 31, pedal arm 32, pedal arm first pivot 33, pedal arm second pivot 34 and push rod 35.The mechanical connection of hydraulic brake system 1 (shown in the solid line among Fig. 1) is: the brake pedal 31 in the brake assembly 3 is connected with pedal arm first pivot 33 by pedal arm 32, pedal arm first pivot 33 is connected with the car body (not shown), and brake pedal 31 is connected with push rod 35 by pedal arm second pivot 34; Push rod 35 is connected with vacuum booster 4; Push rod on the vacuum booster 4 is connected with the push rod of master brake cylinder 5.The oil circuit of hydraulic brake system 1 connects (shown in the dotted line among Fig. 1): two liquid outlets 51,52 of master brake cylinder 5 are connected with two inlets 61,62 of hydraulic efficiency governing module 6 by pipeline respectively, four liquid outlets on the hydraulic efficiency governing module 6 are connected by the inlet of pipeline with four brake wheel cylinders 7 respectively, to realize braking, on each oil circuit pipeline, be respectively arranged with a pressure sensor 8 to four wheel U1, U2, U3, U4.The circuit of hydraulic brake system 1 connects (shown in the imaginary point line among Fig. 1): four-wheel speed sensors 9 collects the wheel speed information of wheel U1, U2, U3, U4 and the pressure information of each oil circuit pipeline that each pressure sensor 8 collects flows to brake controller 10, brake controller 10 judges according to wheel speed information whether wheel U is tending towards locking, and the while is determined the increase and decrease control of brake wheel cylinder 7 pressure according to brake wheel cylinder 7 pressure and motor braking torque.
As shown in Figure 1, prior motor brake system 2 comprises a battery 11, an electric machine controller 12, a motor 13 and a change-speed box 14.The mouth of the battery 11 in the motor braking system 2 and the input end of electric machine controller 12 are electrically connected with the CAN mouth of brake controller 10 simultaneously, and the input end of electric machine controller 12 and mouth are electrically connected the mouth of battery 11 and the input end of motor 13 respectively.The mouth of motor 13 is connected with the input end of change-speed box 14, and the mouth of change-speed box 14 connects diff 15, is used for drive wheels U and rotates.
Shown in Fig. 3～5, in the hydraulic brake system 1 of the present invention, in order to reduce the vibrations of brake pedal 31 greatly when regulating the brake wheel cylinder hydraulic braking force, the push rod 35 between brake assembly 3 and the vacuum booster 4 is provided with a bumper 16.Bumper 16 can adopt a rubber block (as shown in Figure 3), also can adopt a spring (as shown in Figure 4), can also adopt a spring damping structure (as shown in Figure 5).When bumper 16 is a spring damping structure, the spring damping structure comprises that a bumper shell 161, has piston 163, a spring 164, a push rod 165 and the fluid 166 of damping hole 162, piston 163, spring 164 and fluid 166 all are encapsulated in the bumper shell 161, fluid 166 can flow through damping hole 162, piston 163 can make spring 164 make fore and aft motion under the lubricating effect of fluid 166.Push rod 35 in the brake assembly 3 runs through bumper shell 161 captives joint with piston 163, and spring 164 is captiveed joint with vacuum booster 4 by push rod 165, when push rod 165 axial motions, spring 164 and fluid 166 with this Motion Transmission to piston 163.
As shown in Figure 6, the vacuum input end 41 of the vacuum booster 4 in the hydraulic brake system 1 of the present invention is set up and is connected a vacuum feed module 17, and vacuum feed module 17 comprises a vacuum pump 171, a direct current motor 172, a pressure relay 173 and a power supply 174.The mouth of vacuum pump 171 connects the reference pressure input end of vacuum input end 41 and pressure relay 173 simultaneously by a pipeline, the mouth of pressure relay 173 connects the input end of DC machine 172, DC machine 172 is electrically connected vacuum pump 171, and power supply 174 is given DC machine 172 and pressure relay 173 power supplies.Pressure relay 173 conductings when reference pressure is higher than setting value, DC machine 172 drives vacuum pump 171 work, when reference pressure during less than setting value pressure relay 173 disconnect, DC machine 172 quits work, and the degree of vacuum in the vacuum booster 4 is maintained in the suitable scope.
As shown in Figure 1, have additional a main valve 18 and a main valve 19 respectively on the oil circuit pipeline at inlet 61,62 places of hydraulic efficiency governing module 6 of the present invention, the benefit of doing like this is: when carrying out that braking energy reclaims and speed of a motor vehicle step-down need reduce the motor braking torque time, need to increase synchronously hydraulic braking force, promptly open the near front wheel U1 in the hydraulic efficiency governing module 6 and the inlet valve of off front wheel U2, this can cause brake pedal 31 to sink, and influences pedal sense.If close main valve 18,19 in this process, the duty cycle of switching of the inlet valve of the motor speed in the modulated pressure adjustment module 6 and the near front wheel U1, off front wheel U2 then can be realized brake pedal feel preferably simultaneously.In the present embodiment, main valve 18,19 all can adopt existing electromagnetic switch valve.
When the present invention works, brake controller 10 from pressure sensor 8 read the master brake cylinder brake wheel cylinder pressure signal, read the motor braking dtc signal and from wheel speed sensors 9, obtain wheel speed from motor, if wheel is not tending towards locking, then according to the expected value of the calculation of pressure motor braking torque of master brake cylinder, the pressure that increases front wheel cylinder according to the pressure decision needs of actual motor torque and front wheel cylinder still reduces the pressure of front wheel cylinder.If the pressure that needs to increase front wheel cylinder then makes two inlet valves of front wheel cylinder open, two delivery valves of front wheel cylinder are opened if need reduce the pressure of front wheel cylinder.
Claims (5)
1. composite braking system, it comprises a hydraulic braking sysgtem that is made of brake pedal, vacuum booster, master brake cylinder, hydraulic efficiency governing module, brake wheel cylinder, pressure sensor, wheel speed sensors and the brake controller motor braking system that unifies, it is characterized in that: have additional a bumper on the push rod between described brake pedal and the vacuum booster, have additional a main valve respectively on the oil circuit pipeline at two inlet places on the described hydraulic efficiency governing module, the vacuum input end on the described vacuum booster is set up and is connected a vacuum feed module; Described vacuum feed module comprises a vacuum pump, a direct current motor, a pressure relay and a power supply, described vacuum delivery side of pump connects the vacuum input end on the described vacuum booster and the reference pressure input end of described pressure relay simultaneously by a pipeline, the mouth of described pressure relay connects the input end of described DC machine, described DC machine is electrically connected described vacuum pump, and described power supply is given described DC machine and pressure relay power supply.
2. a kind of composite braking system as claimed in claim 1 is characterized in that: described bumper is a rubber block.
3. a kind of composite braking system as claimed in claim 1 is characterized in that: described bumper is a spring.
4. a kind of composite braking system as claimed in claim 1 is characterized in that: described bumper is a spring damping structure.
5. a kind of composite braking system as claimed in claim 4, it is characterized in that: described spring damping structure comprises that a bumper shell, has the piston of damping hole, a spring, a push rod and fluid, described piston, spring and fluid all are encapsulated in the described bumper shell, described spring connects described push rod, this push rod is captiveed joint with described vacuum booster, runs through described bumper shell with described brake pedal bonded assembly push rod and captives joint with described piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102374817A CN101716890B (en) | 2009-11-09 | 2009-11-09 | Composite braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102374817A CN101716890B (en) | 2009-11-09 | 2009-11-09 | Composite braking system |
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| Publication Number | Publication Date |
|---|---|
| CN101716890A CN101716890A (en) | 2010-06-02 |
| CN101716890B true CN101716890B (en) | 2011-10-26 |
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| CN2009102374817A Active CN101716890B (en) | 2009-11-09 | 2009-11-09 | Composite braking system |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941430B (en) * | 2010-07-05 | 2013-01-02 | 清华大学 | Hydraulic braking system of four-wheel driven electric vehicle |
| CN102490617B (en) * | 2011-11-14 | 2014-04-09 | 江苏大学 | Hybrid braking system with active auxiliary braking function and control method |
| CN103129551B (en) * | 2011-11-23 | 2015-04-22 | 联创汽车电子有限公司 | Braking control system of hybrid vehicle |
| CN105946591B (en) * | 2014-12-01 | 2017-11-21 | 江苏理工学院 | Low-cost electric braking and hydraulic braking coordinated control system for electric automobile |
| CN105946592B (en) * | 2014-12-01 | 2017-11-21 | 江苏理工学院 | Electric braking and hydraulic braking coordination control method for electric automobile |
| CN108215807A (en) * | 2014-12-30 | 2018-06-29 | 充梦霞 | Electric vehicle and its method of work for braking electric energy recovering system |
| CN106143163B (en) * | 2016-07-06 | 2018-08-07 | 郭恬 | A kind of braking system of electric car with energy feedback |
| CN106494258B (en) * | 2016-09-18 | 2018-08-28 | 东风襄阳旅行车有限公司 | Electric vehicle vacuum servo and motor composite braking system and brake control method |
| CN108001240B (en) * | 2017-12-19 | 2018-10-26 | 南昌工程学院 | A kind of braking energy recovery system for electric vehicle |
| CN108045236B (en) * | 2017-12-19 | 2018-10-26 | 南昌工程学院 | A kind of braking energy recovery system for electric vehicle |
| CN111071229A (en) * | 2019-12-31 | 2020-04-28 | 一汽解放汽车有限公司 | Air-assisted hydraulic braking system and new energy automobile |
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2009
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