CN104129382A - Vacuum booster capable of simulating pedal travel - Google Patents

Vacuum booster capable of simulating pedal travel Download PDF

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Publication number
CN104129382A
CN104129382A CN201410417444.5A CN201410417444A CN104129382A CN 104129382 A CN104129382 A CN 104129382A CN 201410417444 A CN201410417444 A CN 201410417444A CN 104129382 A CN104129382 A CN 104129382A
Authority
CN
China
Prior art keywords
chamber
piston
vacuum booster
simulator
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410417444.5A
Other languages
Chinese (zh)
Inventor
李文惠
张玉海
柳恩芬
陈思琦
张殿东
宋巍
张立国
曹明明
戴鸿雁
石喜娟
刘哲
徐巾巾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jilin Dongguang Aowei Automobile Brake System Co Ltd
Original Assignee
Jilin Dongguang Aowei Automobile Brake System Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jilin Dongguang Aowei Automobile Brake System Co Ltd filed Critical Jilin Dongguang Aowei Automobile Brake System Co Ltd
Priority to CN201410417444.5A priority Critical patent/CN104129382A/en
Publication of CN104129382A publication Critical patent/CN104129382A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a vacuum booster capable of simulating pedal travel, and belongs to the industry of automobiles. The vacuum booster comprises a signal collecting portion, a vacuum booster body and a simulator, the signal collecting portion is composed of an acceleration sensor, the vacuum booster body is composed of a conventional vacuum booster assembly and a valve rod, and the valve rod is of a sleeve structure. The vacuum booster has the advantages of being novel and simple in structure and reliable in performance. Due to the fact that the vacuum booster is manufactured by improving an original hydraulic brake system, a hydraulic brake portion is seldom changed, only the simulator portion and the sensor portion are additionally arranged, and the valve rod is improved. The brake systems of hybrid electric vehicles and battery electric vehicles of different models are improved, different pedal feeling simulators are designed, and only valve rod clearance and spring rigidity need to be adjusted. As for the software portion, only a threshold value of an acceleration signal needs to be changed, the achievement method is simple and performance is reliable.

Description

A kind of vacuum booster of simulating pedal stroke
Technical field
The invention belongs to auto trade, be applied to the brake system of hybrid vehicle or pure electric automobile, the brake system of car that especially adopts conventional hydraulic braking and regenerative braking to carry out energy recovery and deposit.
Background technology
In conventional hydraulic brake system, vacuum booster is critical component wherein, and its Main Function is amplify treadle effort and pass to master brake cylinder and then produce hydraulic pressure transfer and brake to car load brake system.Traditional vacuum booster Direct Recognition chaufeur imposes on the speed-slackening signal of pedal, and treadle effort is amplified to the braking that produces respective strengths.
Hybrid vehicle and pure electric automobile adopt feedback braking device, for the recovery braking energy of maximum possible, wish possible in the situation that, only to use regenerative braking, and in needs, start hydraulic braking when braking.Originally, in hydraulic brake system, braking energy reclaims not exclusively, and when brake efficiency and braking, pedal feels undesirable.
Summary of the invention
The invention provides a kind of vacuum booster of simulating pedal stroke, to solve in original hydraulic brake system, braking energy reclaims not exclusively, and when brake efficiency and braking, pedal feels undesirable problem.
Technical scheme of the present invention is: comprise acquisition of signal part, and vacuum booster and simulator, described acquisition of signal part is become by groups of acceleration sensors, and vacuum booster is made up of conventional vacuum booster assembly and valve rod, and this valve rod is tube-in-tube structure, simulator part is made up of simulator push rod, simulator cylinder body, I chamber, II chamber, III chamber, IV chamber, back-up ring, push rod end cap, idle travel spring, big spring, first piston buffer bar, first piston leather cup, first piston, pull back spring, magnet coil, normally open valve, the second piston, the second piston cup, the second buffer piston bar, the second piston spring, end cap, back-up ring, oil circuit one, oil circuit two, first piston buffer bar, first piston leather cup is fixed on first piston, the second piston cup, the second buffer piston bar is fixed on the second piston, simulator cylinder body has four chambeies, I chamber, II chamber, III chamber, IV chamber, back-up ring, push rod end cap, idle travel spring, big spring is contained in I chamber in turn, pull back spring is contained in II chamber, the second piston spring, end cap, back-up ring is contained in IV chamber in turn, separate by first piston in HeⅡ chamber, I chamber, separate by the second piston in HeⅣ chamber, III chamber, II chamber is by oil circuit one, oil circuit two is connected with III chamber, normally open valve is positioned at oil circuit one, in the middle of oil circuit two, magnet coil and normally open valve solderless wrapped connection.
The invention has the advantages that: novel structure is simple dependable performance.Owing to being improvement to original hydraulic brake system, hydraulic braking part is changed very little, has only increased simulator part and Sensor section, and has improved valve rod.Hybrid vehicle and pure electric automobile for different automobile types improve its brake system, design different pedal sense simulators and only need to adjust valve lever clearance and spring stiffness.Software section also only need to be changed the threshold value of acceleration signal, and implementation method is simple, dependable performance.
Brief description of the drawings
Fig. 1 is the structural representation of invention;
Fig. 2 is the structural representation of invention valve rod;
Fig. 3 is the structural representation of invention simulator part;
Fig. 4 is brake pedal force-displacement curve.
Detailed description of the invention
Comprise acquisition of signal part 24, vacuum booster 25 and simulator 26, described acquisition of signal part 24 is made up of acceleration pick-up 1, and vacuum booster 25 is made up of conventional vacuum booster assembly 2 and valve rod 3, and this valve rod is tube-in-tube structure, simulator part 26 is made up of simulator push rod 4, simulator cylinder body 5, I chamber 501, II chamber 502, III chamber 503, IV chamber 504, back-up ring 6, push rod end cap 7, idle travel spring 8, big spring 9, first piston buffer bar 10, first piston leather cup 11, first piston 12, pull back spring 13, magnet coil 14, normally open valve 15, the second piston 16, the second piston cup 17, the second buffer piston bar 18, the second piston spring 19, end cap 20, back-up ring 21, oil circuit 1, oil circuit 2 23, first piston buffer bar 10, first piston leather cup 11 is fixed on first piston 12, the second piston cup 17, the second buffer piston bar 18 is fixed on the second piston 16, simulator cylinder body 5 has four chambeies, I chamber 501, II chamber 502, III chamber 503, IV chamber 504, back-up ring 6, push rod end cap 7, idle travel spring 8, big spring 9 is contained in I chamber 501 in turn, pull back spring 13 is contained in II chamber 502, the second piston spring 19, end cap 20, back-up ring 21 is contained in IV chamber 504 in turn, separate by first piston 12 in 501HeⅡ chamber, I chamber 502, separate by the second piston 16 in 503HeⅣ chamber, III chamber 504, II chamber 502 is by oil circuit 1, oil circuit 2 23 is connected with III chamber 503, normally open valve 15 is positioned at oil circuit 1, in the middle of oil circuit 2 23, magnet coil 14 and normally open valve 15 solderless wrapped connections.
principle of work of the present invention:
In the present invention, braking is divided into small intensity braking, the braking of middle intensity and three kinds of situations of emergency braking (hereinafter to be referred as little braking, middle braking and emergency braking), its medium and small braking, middle braking are continuous processes, exerted pressure and the pedal displacement that produces affects by chaufeur to pedal.
In the braking procedure of hybrid vehicle and pure electric automobile, chaufeur does not need traditional braking system works while applying small intensity braking, but by regenerative braking system, this part of braking energy is reclaimed and stored, postpone vacuum booster cut-in time.In the time applying middle intensity braking, traditional braking system is started working.In the time of apply the emergency brake, only has traditional braking system works.
The present invention is modified into the valve rod of traditional braking system the structure of disconnection, and chaufeur does not stress with the initial stage servo-unit of conventional speeds pedal, only overcomes the stroke that this part disconnects.On rear case of vacuum booster, fix a simulator, the force-displacement curve of simulating brake pedal.Because traditional brake system (vacuum booster) is in parallel with simulator, after two-part force-displacement curve stack, just overlap with conventional brake curve, realize the function of simulation pedal stroke.
The servo-unit of simulation pedal stroke is divided into three parts by the present invention, and Part I is acquisition of signal part, mainly comprises the acceleration pick-up being arranged on pedal; Part II is vacuum booster, basic identical with conventional servo-unit, and valve rod is tube-in-tube structure; Part III is mounted in the simulator part between servo-unit and pedal.Wherein Part III is core of the present invention.
In four chambeies of simulator cylinder body 5, I chamber, IV chamber are spring cavity, and II chamber, III chamber are hydraulic cavities, are inside full of braking liquid, can control the switch of normally open valve 15 by controlling magnet coil 14, and then control the circulation of liquid between II chamber, III chamber.
The present invention can meet the brake request of hybrid vehicle and pure electric automobile, is first that the braking of identification of driver is intended to, judges type of retardation.In the time that braking starts, if while being judged as emergency braking, servo-unit work, simulator is not worked; If little braking, servo-unit is not worked, simulator work; Along with the carrying out of braking, if when middle braking, servo-unit and simulator are worked simultaneously.That is:
Emergency braking:
Acceleration pick-up gathers the acceleration/accel (acceleration/accel of pedal) of chaufeur pedal, in the time that this is worth higher than predetermined threshold value A, is defined as emergency braking.
Acceleration pick-up 1 gathers the acceleration/accel of pedal, and this signal is passed to ECU, in the time being judged to be emergency braking, and magnet coil 14 no powers, normally open valve 15 keeps normally open, and simulator II chamber liquid can flow to III chamber.Chaufeur is stepped on brake pedal, promotes vacuum booster valve rod 3 and simulator push rod 4 and jointly moves forward.Because acceleration/accel is very large, the gap of valve rod 3 is overcome rapidly, and vacuum booster is normally worked, automobile traditional braking system works.Normally open valve 15 is opened, and push rod 4 moves forward, and only need overcome the spring in simulator.
Little braking:
Acceleration pick-up 1 Real-time Collection pedal acceleration/accel, when acceleration/accel is not during higher than predetermined threshold value A, is defined as little braking.Now, magnet coil 14 is switched on, and normally open valve 15 is closed.Chaufeur is stepped on brake pedal, promotes vacuum booster valve rod 3 and simulator push rod 4 and jointly moves forward.Because valve rod 3 exists gap, when little braking, pedal reach only overcomes valve lever clearance, can not promote servo-unit work.Push rod 4 moves forward, and first overcomes idle travel spring 8 drags, and push rod end cap 7 contacts after big spring 9, and idle travel spring 8 is in parallel with big spring 9, and valve rod promotes it and advances.The little brake condition of vacuum booster in this process simulation traditional braking system, realizes driver pedal force-displacement curve when constant, and vacuum booster is not worked.
Middle braking:
On little braking basis, chaufeur continues to step on brake pedal, promotes vacuum booster valve rod 3 and simulator push rod 4 and jointly moves forward.Now, the gap of valve rod 3 is eliminated, and along with the reach of pedal, valve rod 3 moves forward, and vacuum booster is started working.Push rod 4 continues reach, overcomes idle travel spring 8 and big spring 9, and compresses simulator one chamber liquid.This stage, braking request in chaufeur output, vacuum booster and motor co-operation.

Claims (1)

1. can simulate the vacuum booster of pedal stroke for one kind, it is characterized in that: comprise acquisition of signal part, vacuum booster and simulator, described acquisition of signal part is become by groups of acceleration sensors, vacuum booster is made up of conventional vacuum booster assembly and valve rod, and this valve rod is tube-in-tube structure, simulator part is made up of simulator push rod, simulator cylinder body, I chamber, II chamber, III chamber, IV chamber, back-up ring, push rod end cap, idle travel spring, big spring, first piston buffer bar, first piston leather cup, first piston, pull back spring, magnet coil, normally open valve, the second piston, the second piston cup, the second buffer piston bar, the second piston spring, end cap, back-up ring, oil circuit one, oil circuit two, first piston buffer bar, first piston leather cup is fixed on first piston, the second piston cup, the second buffer piston bar is fixed on the second piston, simulator cylinder body has four chambeies, I chamber, II chamber, III chamber, IV chamber, back-up ring, push rod end cap, idle travel spring, big spring is contained in I chamber in turn, pull back spring is contained in II chamber, the second piston spring, end cap, back-up ring is contained in IV chamber in turn, separate by first piston in HeⅡ chamber, I chamber, separate by the second piston in HeⅣ chamber, III chamber, II chamber is by oil circuit one, oil circuit two is connected with III chamber, normally open valve is positioned at oil circuit one, in the middle of oil circuit two, magnet coil and normally open valve solderless wrapped connection.
CN201410417444.5A 2014-08-24 2014-08-24 Vacuum booster capable of simulating pedal travel Pending CN104129382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410417444.5A CN104129382A (en) 2014-08-24 2014-08-24 Vacuum booster capable of simulating pedal travel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410417444.5A CN104129382A (en) 2014-08-24 2014-08-24 Vacuum booster capable of simulating pedal travel

Publications (1)

Publication Number Publication Date
CN104129382A true CN104129382A (en) 2014-11-05

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105487594A (en) * 2016-01-22 2016-04-13 吉林大学 Pedal feel simulator adjusted through electromagnetic control
CN105620443A (en) * 2016-03-10 2016-06-01 重庆长安汽车股份有限公司 Brake pedal stroke calculation device and brake pedal stroke calculation method
CN107226076A (en) * 2017-05-17 2017-10-03 江苏理工学院 A kind of brake feel analogue means based on motor force

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200960919Y (en) * 2006-10-09 2007-10-17 上海燃料电池汽车动力系统有限公司 Modified hybrid power automobile braking device based on traditional hydraulic braking system
WO2008107023A1 (en) * 2007-03-05 2008-09-12 Continental Teves Ag & Co. Ohg Actuating unit for a motor vehicle brake system
CN101746364A (en) * 2008-12-11 2010-06-23 现代摩比斯株式会社 Regenerative braking actuator apparatus
JP2011131886A (en) * 2011-04-04 2011-07-07 Hitachi Automotive Systems Ltd Electric booster
US20130113271A1 (en) * 2003-08-06 2013-05-09 Holger von Hayn Brake actuating unit for actuating a motor vehicle brake system
CN204077645U (en) * 2014-08-24 2015-01-07 吉林东光奥威汽车制动系统有限公司 A kind of vacuum booster of simulating pedal stroke

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130113271A1 (en) * 2003-08-06 2013-05-09 Holger von Hayn Brake actuating unit for actuating a motor vehicle brake system
CN200960919Y (en) * 2006-10-09 2007-10-17 上海燃料电池汽车动力系统有限公司 Modified hybrid power automobile braking device based on traditional hydraulic braking system
WO2008107023A1 (en) * 2007-03-05 2008-09-12 Continental Teves Ag & Co. Ohg Actuating unit for a motor vehicle brake system
CN101746364A (en) * 2008-12-11 2010-06-23 现代摩比斯株式会社 Regenerative braking actuator apparatus
JP2011131886A (en) * 2011-04-04 2011-07-07 Hitachi Automotive Systems Ltd Electric booster
CN204077645U (en) * 2014-08-24 2015-01-07 吉林东光奥威汽车制动系统有限公司 A kind of vacuum booster of simulating pedal stroke

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105487594A (en) * 2016-01-22 2016-04-13 吉林大学 Pedal feel simulator adjusted through electromagnetic control
CN105620443A (en) * 2016-03-10 2016-06-01 重庆长安汽车股份有限公司 Brake pedal stroke calculation device and brake pedal stroke calculation method
CN107226076A (en) * 2017-05-17 2017-10-03 江苏理工学院 A kind of brake feel analogue means based on motor force
CN107226076B (en) * 2017-05-17 2020-02-14 江苏理工学院 Brake feel simulation device based on motor force

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Application publication date: 20141105