CN103223931A - Brake pedal stroke simulator applied to brake energy recovery - Google Patents
Brake pedal stroke simulator applied to brake energy recovery Download PDFInfo
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- CN103223931A CN103223931A CN2013101477259A CN201310147725A CN103223931A CN 103223931 A CN103223931 A CN 103223931A CN 2013101477259 A CN2013101477259 A CN 2013101477259A CN 201310147725 A CN201310147725 A CN 201310147725A CN 103223931 A CN103223931 A CN 103223931A
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
- B60T8/4081—Systems with stroke simulating devices for driver input
- B60T8/409—Systems with stroke simulating devices for driver input characterised by details of the stroke simulating device
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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
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
- B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
- B60T8/4081—Systems with stroke simulating devices for driver input
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
- Braking Elements And Transmission Devices (AREA)
Abstract
The invention discloses a brake pedal stroke simulator applied to brake energy recovery and aims at solving the problems of a great number of parts, high cost, complexity for safety monitoring of a system and high fault rate in the prior art. The brake pedal stroke simulator comprises a small spring, a big spring, a piston, a cylinder body, a normally-closed valve core, a normally-closed valve solenoid coil, a normally-opened valve core, a normally-opened valve solenoid coil, a buffer block and a spring seat, wherein the piston is mounted in a piston hole of the cylinder body; the small spring is sleeved at the right end of the piston; the spring seat is mounted in a spring seat hole; the right end of the small spring is sleeved on a small spring seat; the left end of the big spring is sleeved on a big spring seat; an end cover is mounted at the right end in the spring seat hole; the right end of the big spring is sleeved on an annular boss of the end cover; the buffer block is sleeved at the right end of a stepped column body in the center of the spring seat; the normally-closed valve core is mounted in a normally-closed vertical blind hole of the cylinder body; the normally-opened valve core is mounted in a normally-opened vertical blind hole of the cylinder body; the normally-closed solenoid coil is sleeved at the upper end of the normally-closed valve core; and the normally-opened solenoid coil is sleeved at the upper end of the normally-opened valve core.
Description
Technical field
The present invention relates to a kind of automobile brake pedal stroke simulator, or rather, the present invention relates to a kind of brake-pedal travel simulator that braking energy reclaims that is applied to.
Background technology
Reclaiming braking energy is a kind of effective means that hybrid power and pure electric automobile are realized oil-saving discharging-reducing, is applicable to that the brake energy recovering system efficiently of new-energy automobile is to be badly in need of very much.
Braking safety is that brake system of car at first guarantees.Linear braking can realize the full decoupled of brake pedal and brake-pressure, more be applicable to motor and hydraulic combined brake energy recovering system, querying but market remains its system safety, particularly when thrashing, be difficult to satisfy the basic demand of brake legislation.Therefore present stage, on the conventional hydraulic brake system, carry out slight modification, make it to be applicable to brake energy recovering system, than being applicable to that more the line control system that braking energy reclaims will have more practical meaning in engineering.
The conventional hydraulic brake system is changed, when brake pedal is stepped on, the alternative part hydraulic braking force of electricity consumption mechanism power, the assurance rate of braking is realized energy recovery simultaneously, but therefore make that the pressure of brake-pedal travel and brake wheel cylinder is not to concern one to one, this require brake pedal can with the pressure decoupling zero of wheel cylinder.Therefore a difficult point appears in the design of brake energy recovering system steering unit: pedal stroke---the simulation of treadle effort relation.The patent of invention of brake pedal simulator is arisen at the historic moment.
Through relevant patent documentation inquiry, can being divided into that brake pedal feel simulator patent is representative is several:
Chinese patent announces that (announcements) number be CN101566211A, and announcement (announcement) day is on October 28th, 2009, and denomination of invention is " damper regulator and an electronic brake pedal sense simulator ", and the application people is a Saic Chery Automobile Co., Ltd.This patent relates generally to the electron steering brake pedal feel simulator that has used damper regulator, needs electronic controller, and cost obviously and increased the complexity of system hardware and control.
Chinese patent announces that (announcements) number be CN101879891B, and announcement (announcement) day is on August 15th, 2012, and denomination of invention is " simulator for feeling automobile brake pedal ", and the application people is Zhejiang Yatai Mechanical ﹠ Electrical Co. Ltd..The simulator electromagnetic valve that this patent relates to has four, pressure sensor etc., and simulator links to each other with liquid storing cup.Chinese patent announces that (announcements) number be CN202130438, and announcement (announcement) day is on 02 1st, 2012, and number of patent application is 915068.8, and denomination of invention is " a kind of simulator for feeling automobile brake pedal ", and the application people is Zhejiang Yatai Mechanical ﹠ Electrical Co. Ltd..What adopt is that a two-bit triplet electromagnetic valve comes being connected of modulated pressure regulon and brake pedal feel simulator.These two patent common features have been to use a plurality of electromagnetic valves, even have used pressure sensor, and parts are many more, and cost is high more, and the security monitoring of system is complicated more, and fault rate is high more.
Chinese patent announces that (announcements) number be CN201989768, and announcement (announcement) day is on September 28th, 2011, and denomination of invention is " a kind of brake pedal apparatus of automobile line control brake system ", applies for artificial Jiangsu Teachers University of Technology.Its simulator is inside and outside spring structure, does not have the solenoid control part, directly links to each other with brake pedal.This patent is served line control brake system, and cost is low, but big to the variation of whole brake system.
U.S. Patent Publication (announcement) number is US7,219, and 966B2 announces that (announcements) day is on May 22nd, 2007, and number of patent application is 10/958021, and denomination of invention is " a brake pedal feel simulator ", applies for artificial Continental Motors Corperation.What this invention was used is the relation of coming simulating brake pedal displacement and treadle effort by a spring.The pedal sense of this pedal simulator and traditional vehicle be difference to some extent, needs chaufeur to adapt to.
U.S. Patent Publication (announcement) number is US7,331, and 641B2 announces that (announcements) day is on February 19th, 2008, and number of patent application is 10/840627, and denomination of invention is " a braking distance simulator ", applies for artificial Ai Di Ces Co.,Ltd.What this invention was used is the brake pedal displacement of an elastic element and a spring and the simulator apparatus of treadle effort, is integrated within the master brake cylinder, and structure is comparatively complicated, the technological requirement height.
Chinese patent announces that (announcement) number is CN102066167A, announce that (announcement) day is on May 18th, 2011, number of patent application is 200980100928.4, and denomination of invention is " stroke simulator and an arrester control device ", and the application people is a Toyota Motor Corporation rep..This characteristic feature of an invention is that normally closed valve of use and elastic element come the relation between simulating brake pedal stroke and the treadle effort.But when this patent is used, need be big to traditional braking system change amount, and device is comparatively complicated.
Summary of the invention
Technical matters to be solved by this invention is to have overcome prior art to have that the parts that use are many, cost is high, the security monitoring of system is complicated and fault rate high problem, and a kind of brake-pedal travel simulator that is applied to the braking energy recovery is provided.
For solving the problems of the technologies described above, the present invention adopts following technical scheme to realize: the described brake-pedal travel simulator that is applied to the braking energy recovery includes little spring, big spring, end cap, piston, cylinder body, normally closed valve spool, normally closed valve magnet coil, normally open valve spool, normally open valve magnet coil, bump rubber and spring perch.
Piston is packed into and is sliding block joint in the piston hole of cylinder body lower end, the piston right-hand member is set with little spring, spring perch is installed in the spring base hole on piston hole right side, the right-hand member of little spring is sleeved on the submissile spring abutment of spring perch left end, the big spring left end is sleeved on the big spring seat of spring perch right-hand member, the right-hand member that end cap is installed in spring base hole is a captive joint, and the right-hand member of big spring is sleeved on the annular protrusion of end cap left end center, and the right-hand member of the center ladder cylinder of spring perch is set with bump rubber.
In the normally closed vertical hole of normally closed valve spool riveting on cylinder body, normally open valve spool riveting often opening in the vertical hole on cylinder body, the normally closed valve magnet coil is sleeved on the valve rod of normally closed valve spool upper end; The normally open valve magnet coil is sleeved on the valve rod of normally open valve spool upper end.
Be set with the U RunddichtringO among the seal groove D of the piston left end described in the technical scheme, it is sliding block joint that bumpar post is installed in the centre hole E of piston right-hand member.
The right-hand member that end cap described in the technical scheme is installed in spring base hole is that captive joint is meant: in the jump ring groove of spring base hole right-hand member jump ring is installed, the left side of jump ring is connected with the contact of the right side of end cap; Be set with the o RunddichtringO in the seal groove of end cap left end.
Normally closed valve magnet coil described in the technical scheme and normally open valve magnet coil are buckled with the electromagnetic valve gland, adopt the sealant adhesion between electromagnetic valve gland and the cylinder body.
Cylinder body described in the technical scheme is a cuboid framing member, the lower end of cylinder body is processed with the horizontally disposed ladder blind hole of forming that is communicated with piston hole by spring base hole, the place, aperture of spring base hole is provided with the jump ring groove, the left upper end of cylinder body is processed with 2 vertical holes side by side, the vertical hole in left side is for installing the normally closed vertical hole of normally closed valve spool, vertical hole is often opened for what the normally open valve spool was installed in the vertical hole on right side, adopt horizontal oil duct to be communicated with between 2 vertical holes, the normally closed vertical hole in left side and the oil outlet B on the cylinder body left side adopt horizontal oil duct to be communicated with, the horizontal oil duct of often opening on vertical hole and the rear end of the cylinder block face of oil outlet A employing on right side is communicated with, and the piston hole in the horizontally disposed ladder blind hole of the normally closed vertical hole in left side and its below adopts vertical oil duct to be communicated with.
Piston described in the technical scheme is a cylindrical structural spare, piston is made up of piston main cylinders, roundlet boss and small cylinder, the left end of piston main cylinders is processed with the seal groove that the U RunddichtringO is installed, the right-hand member of piston main cylinders is connected with the roundlet boss that little spring is installed, the right side of roundlet boss is connected with small cylinder, the rotation axis conllinear of piston main cylinders, roundlet boss and small cylinder, the diameter of piston main cylinders, roundlet boss diameter and small cylinder diameter reduce successively, are processed with the centre hole E that bumpar post is installed on the axis of small cylinder.
Spring perch described in the technical scheme is made up of submissile spring abutment, disc seat, big spring seat and center ladder cylinder, submissile spring abutment, disc seat, big spring seat and center ladder cylinder fuse successively, the little spring seat is positioned at the left side of disc seat, the big spring seat is positioned at the right side of disc seat, center ladder cylinder is positioned at the right side of big spring seat, the rotation axis conllinear of submissile spring abutment, disc seat, big spring seat and center ladder cylinder, the diameter of submissile spring abutment is less than the diameter of disc seat, and the diameter of disc seat, big spring seat and center ladder cylinder reduces successively.
Big spring left end described in the technical scheme is sleeved on the big spring seat of spring perch right-hand member, and formed G face contact is connected with big spring seat and disc seat in the left side of big spring.
The right-hand member of described little spring is sleeved on the submissile spring abutment of spring perch left end, and formed F face contact is connected with submissile spring abutment and disc seat in the right side of little spring.
Described spring perch is installed in the spring base hole on piston hole right side, and the annular end face contact in the ladder blind hole of submissile spring abutment and formed F face of disc seat and cylinder body lower end is connected.
Compared with prior art the invention has the beneficial effects as follows:
1. consult Fig. 7, brake-pedal travel simulator and the contrast of existing patent that is applied to the braking energy recovery of the present invention belongs to brand new, with two sections spring simulating brake pedal senses, liquid storage cylinder can hold the liquid that flows out in the master cylinder, realizes pedal and pressure of wheel braking cylinder decoupling zero; The curve of its treadle effort and pedal displacement curve and traditional braking system is very approaching, and the hard change stiffness characteristics in earlier soft back also meets the design objective of treadle effort characteristic very much;
2. the brake-pedal travel simulator that is applied to the braking energy recovery of the present invention uses 2 switch electromagnetic valves, by controlling the switch of two valves, can realize being applied to brake-pedal travel simulator and major loop disconnection, the brake-pedal travel simulator and the master cylinder fluid connection that are applied to the braking energy recovery, the brake-pedal travel simulator that is applied to the braking energy recovery and wheel cylinder major loop fluid connection, the whole fluid connection that braking energy reclaims respectively, satisfy the demand for control of braking energy removal process, and control is simple, safe and reliable;
3. the brake-pedal travel simulator of braking energy recovery that is applied to of the present invention is when failure state, reference numerals is that 1 normally open valve no power is in unimpeded state, reference numerals is that 2 normally closed valve no power is in closed condition, being applied to brake-pedal travel simulator that braking energy reclaims and master cylinder and loop this moment all disconnects, braking liquid can not flow to the liquid storage cylinder of the brake-pedal travel simulator that is applied to the braking energy recovery, still can keep the braking potential of conventional hydraulic brake system this moment;
4. the brake-pedal travel simulator that is applied to the braking energy recovery of the present invention is applied in the brake energy recovering system of new-energy automobile, the brake-pedal travel simulator that only needs to be applied to the braking energy recovery is connected between master cylinder and the hydraulic control unit, easy for installation, be convenient to integrated, little to the change amount of conventional hydraulic.
5. of the present invention to be applied to the brake-pedal travel simulator mechanism that braking energy reclaims simple, and amount of parts is few, and gauge members such as spring and seal ring easily obtain, and the cost of material is low, and processing technology is simple.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing:
Fig. 1 is the brake-pedal travel simulator structural principle scheme drawing that is applied to the braking energy recovery of the present invention;
The front view that Fig. 2 forms for the brake-pedal travel simulator structure that is applied to the braking energy recovery of the present invention;
Fig. 3 is the cutaway view at brake-pedal travel simulator C-C place among Fig. 2;
Fig. 4 is the front view that is applied to the piston that adopted in the brake-pedal travel simulator that braking energy reclaims of the present invention;
Fig. 5 is the front view that is applied to the spring perch that adopted in the brake-pedal travel simulator that braking energy reclaims of the present invention;
Fig. 6 is the scheme drawing that is applied to the installation site of brake-pedal travel simulator in brake energy recovering system of braking energy recovery of the present invention;
The diagram of curves of Fig. 7 for concerning between brake pedal displacement that is applied to the brake-pedal travel simulator that braking energy reclaims of the present invention and the brake pedal force;
The target property diagram of curves of Fig. 8 for concerning between piston displacement that is applied to the brake-pedal travel simulator that braking energy reclaims of the present invention and the piston force;
Among the figure: 1. normally open valve, 2. normally closed valve, 3. hydraulic cavities, 4. little spring, 5. big spring, 6. end cap, 7. big spring seat, 8. submissile spring abutment, 9. piston, 10 cylinder bodies, 11. the normally closed valve spool, 12. normally closed valve magnet coils, 13. normally open valve spools, 14. the normally open valve magnet coil, 15. electromagnetic valve glands, 16. jump rings, 17.o RunddichtringO, 18. bump rubbers, 19. spring perches; 20. bumpar post, 21.U RunddichtringO, 22. brake-pedal travel simulators, 23. master brake cylinders; 24. liquid storing cup, 25. pedal angular-motion transducers, 26, brake pedal, 27. vacuum booster units, 28. hydraulic control units, 29. drgs, 30. feed liquor valves.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is explained in detail:
The brake-pedal travel simulator that is applied to the braking energy recovery of the present invention is made up of electromagnetic valve partial sum hydraulic spring grease cup cylinder part.
Consult Fig. 2, electromagnetic valve partly comprises normally closed valve spool 11, normally closed valve magnet coil 12, normally open valve spool 13, normally open valve magnet coil 14 and electromagnetic valve gland 15.
Hydraulic spring grease cup cylinder part (housing assembly) mainly comprises little spring 4, big spring 5, end cap 6, piston 9, cylinder body 10, jump ring 16, o RunddichtringO 17, bump rubber 18, spring perch 19, bumpar post 20 and U RunddichtringO 21.
In other words, described brake-pedal travel simulator 22 comprises little spring 4, big spring 5, end cap 6, piston 9, cylinder body 10, normally closed valve spool 11, normally closed valve magnet coil 12, normally open valve spool 13, normally open valve magnet coil 14, electromagnetic valve gland 15, jump ring 16, o RunddichtringO 17, bump rubber 18, spring perch 19, bumpar post 20 and U RunddichtringO 21.
Described cylinder body 10 is a cuboid framing member, the lower end of cylinder body 10 is processed with horizontally disposed ladder blind hole, the diameter of ladder blind hole is descending from right to left, be that the ladder blind hole is communicated with minor diameter circular hole (piston hole) by major diameter circular hole (spring base hole) and forms, the ladder blind hole is used for installing end cap 6, spring perch 19 and piston 9 from right to left successively, and the place, aperture of the large diameter hole in the ladder blind hole (spring base hole) is provided with the jump ring groove; The left upper end of cylinder body 10 is processed with 2 holes that vertically are provided with side by side, the vertical hole in left side is the normally closed vertical hole that normally closed valve spool 11 is installed, the vertical hole on right side, normally closed vertical hole be normally open valve spool 13 is installed often open vertical hole, adopt horizontal oil duct to be communicated with between 2 vertical holes, the vertical hole in left side is that the horizontal oil duct of the oil outlet B employing on normally closed vertical blind hole and cylinder body 10 left sides is communicated with; The horizontal oil duct of oil outlet A employing that promptly often open on vertical hole and cylinder body 10 aft end faces in the vertical hole on right side is communicated with; The vertical hole in left side is that the horizontally disposed ladder blind hole left end of normally closed vertical hole and its below adopts vertical oil duct to be communicated with.
Normally open valve 1 is made up of normally open valve spool 13 and normally open valve magnet coil 14, normally closed valve 2 is made up of normally closed valve spool 11 and normally closed valve magnet coil 12, the housing of normally closed valve spool 11 adopts riveting to be installed in that (the riveting method can be CN201922229U with reference to the Chinese patent publication number in the normally closed vertical hole on the cylinder body 10, open day is on August 10th, 2011, the electromagnetic valve press-fitting tool), the housing of normally open valve spool 13 adopts riveting to be installed in often opening in the vertical hole on the cylinder body 10, and normally closed valve magnet coil 12 is sleeved on the valve rod of normally closed valve spool 11 upper ends; Normally closed valve spool 11 and normally open valve spool 13 (have ready-made article for integrated component, can be CN102162547A with reference to the Chinese patent publication number, open day is on August 24th, 2011, be used to control the electromagnetic valve of fluid), spool face is porose, and there is the space inside, is made up of parts such as spool housing, armature, iron core and springs, normally open valve magnet coil 14 is sleeved on the valve rod of normally open valve spool 13 upper ends, and normally open valve 1 is selected existing finished product for use with normally closed valve 2.Normally open valve 1 leans on the energising of normally closed valve magnet coil 12 and normally open valve magnet coil 14 and outage to realize that electromagnetic valve gland 15 is used for fixing and protects normally closed valve magnet coil 12 and normally open valve magnet coil 14 with the action of normally closed valve 2.Electromagnetic valve gland 15 can adopt the sealant adhesion with cylinder body 10.
Consult Fig. 4, described piston 9 is a cylindrical structural spare, piston 9 is made up of piston main cylinders, roundlet boss and small cylinder, the left end of piston main cylinders is processed with the seal groove that U RunddichtringO 21 is installed, the right-hand member of piston main cylinders is connected with the roundlet boss that little spring 4 is installed, the right side of roundlet boss is connected with small cylinder, the rotation axis conllinear of piston main cylinders, roundlet boss and small cylinder, the diameter of piston main cylinders, roundlet boss diameter and small cylinder diameter reduce successively, are processed with the centre hole E that bumpar post 20 is installed on the axis of small cylinder.
Consult Fig. 5, described spring perch 19 is by submissile spring abutment 8, disc seat, big spring seat 7 is formed with center ladder post, submissile spring abutment 8, disc seat, big spring seat 7 fuses successively with center ladder cylinder, submissile spring abutment 8 is positioned at the left side of disc seat, big spring seat 7 is positioned at the right side of disc seat, center ladder cylinder is positioned at the right side of big spring seat 7, submissile spring abutment 8, disc seat, the rotation axis conllinear of big spring seat 7 and center ladder cylinder, the diameter of submissile spring abutment 8 is less than the diameter of disc seat, disc seat, the diameter of big spring seat 7 and center ladder cylinder is by reducing successively from left to right.The left end of big spring 5 is sleeved on the big spring seat 7, formed G face contact is connected with big spring seat 7 and disc seat in the left side of big spring 5, annular end face contact in the ladder blind hole of submissile spring abutment 8 and formed F face of disc seat and cylinder body 10 lower ends is connected, little spring 4 right-hand members are sleeved on the submissile spring abutment 8, and formed F face contact is connected with submissile spring abutment 8 and disc seat in the right side of little spring 4.Spring perch 19 is integrated big spring seat 7 and submissile spring abutment 8 is in one, and structure is compact more, is convenient to install.
Piston 9 is packed into and is sliding block joint in the piston hole in the ladder blind hole of cylinder body 10 lower ends, the left end of piston 9 (seal groove D in) is set with U RunddichtringO 21(such as Fig. 4), U RunddichtringO 21 plays the leak free effect between piston 9 and piston hole wall, the left end of piston 9 and piston hole form hydraulic cavities 3, as shown in Figure 2, can store braking liquid, the oil duct that connects hydraulic cavities 3 leads to normally closed valve 2, promptly is communicated with normally closed valve spool 11 bottoms.Piston 9 right-hand members are set with little spring 4, and piston 9 is subjected to the elastic force of little spring 4, and the left side of piston 9 is pressed at the bottom of the hole of piston hole on (left side).Bumpar post 20 is installed in the centre hole E of piston 9 right-hand members is sliding block joint, spring perch 19 is installed in the spring base hole on piston hole right side, the right-hand member of little spring 4 is sleeved on the submissile spring abutment 8 of spring perch 19 left ends, big spring 5 left ends are sleeved on the big spring seat 7 of spring perch 19 right-hand members, the right-hand member that end cap 6 is installed in spring base hole is a captive joint, the right-hand member of big spring 5 is sleeved on the annular protrusion of end cap 6 left end centers, in the jump ring groove of the spring base hole right-hand member in the ladder blind hole of cylinder body 10 lower ends jump ring 16 is installed, the left side of jump ring 16 is connected with the right side contact of end cap 6, be that the right-hand member of end cap 6 adopts jump ring 16 to be implemented in the spring base hole axial location to fix, be set with o RunddichtringO 17 in the seal groove of end cap 6 left ends, o RunddichtringO 17 plays the leak free effect between end cap 6 and spring base hole, leak free can prevent simultaneously entering of impurity such as dust.Spring perch 19 is subjected to the elastic force of big spring 5, the left annular end face F of spring perch 19 intermediate discs is connected with the right annular end face contact of ladder blind hole, the right-hand member of the center ladder post of spring perch 19 right-hand members is set with bump rubber 18, the centre hole of the annular protrusion of bump rubber 18 and end cap 6 left end centers cooperates, effect is after big or small compression of spring stroke reaches maximum, if there is hydraulic pressure to enter again, play a buffering, avoid metal bump.Bumpar post 20, piston 9 and U RunddichtringO 21 are the centre parts that are connected braking liquid and length of spring compressed parts, spring force can be converted into brake fluid pressure, feed back to brake pedal again.
During the normality no power, the A mouth of pedal stroke simulator and the oil circuit between the B mouth are unimpeded; During normally open valve 1 energising, the valve port of normally open valve is closed, and cuts off the oil circuit between A mouth and B mouth; Normally closed valve 2 can not influence the smoothness of oil circuit between A mouth and B mouth; During normally closed valve 2 energisings, the valve port of normally closed valve is opened, and liquid can flow into the hydraulic cavities 3 of pedal stroke simulator.
The effect of normally open valve 1 has following 3 points:
1) when not having regenerative brake, regenerative brake fault or emergency braking, allow brake system as traditional braking system normal brake application, guarantee braking safety.
2) when regenerative brake and hydraulic braking co-operative control, close normally open valve, make pressure in the brake wheel cylinder and the pressure decoupling zero in the master brake cylinder ante-chamber, the pressure that the variation of pressure in the brake wheel cylinder can not influenced in the master brake cylinder ante-chamber changes, therefore, can not occur causing the brake pedal jitter phenomenon, can not influence the sensation of brake pedal, guarantee the brake pedal feel in the braking energy removal process because of hydraulic pressure changes.
3) because the 2nd) effect of point, of the present inventionly be applied to brake-pedal travel simulator that braking energy reclaims and can allow regenerative brake in the work that cooperatively interacts of hard intensity glancing impact and mechanical braking, enlarge the Applicable scope of regenerative brake, improved the braking energy percent recovery.
Normally closed valve 2 is direct control switch valves that are applied to the brake-pedal travel simulator work of braking energy recovery of the present invention, normality is for closing, promptly do not allow braking liquid to flow into the brake-pedal travel simulator, have only when regenerative brake and just open, make the work of brake-pedal travel simulator.Design can be satisfied the demand for control of regenerative brake, the braking safety after can guaranteeing on the other hand to lose efficacy on the one hand like this.
The effect of hydraulic cavities 3, the one, in the regenerative brake process, flow into the braking liquid in two front wheel cylinders when holding traditional braking, to satisfy the demand of brake pedal feel simulation in the regenerative brake process; The 2nd, at regenerative brake and the mutual universal time coordinated of mechanical braking, braking liquid in the hydraulic cavities can be used as the hydraulic power source of hydraulic braking compensational regeneration braking, keep equating with assurance regenerative brake and total lock torque and the demand lock torque of mechanical braking, and rational antero posterior axis brakig force distribution.
Consult Fig. 7, dual spring (little spring 4 and big spring 5) tandem setting is the characteristics of the relation curve of brake pedal displacement and brake pedal force among the figure, can well the simulating brake pedal sense.Simulator is after eliminating brake clearance, first section pedal displacement and treadle effort felt to be modeled as the big little spring co-operation of connecting, only need this moment less treadle effort just can obtain the pedal displacement of length, just in time meet the traditional braking pedal in glancing impact pedal displacement and the less feature of treadle effort rate of curve at the beginning.And second section to pedal displacement and treadle effort feel that being modeled as big spring works separately, in this stage, stepping on identical pedal displacement needs bigger treadle effort, just in time meets treadle effort and the bigger feature of pedal displacement rate of curve this moment.The aim curve of displacement of brake-pedal travel emulator piston and piston force as shown in Figure 8.
Can adjust the limit compression stroke of big little spring by the size that changes big spring seat 7 and submissile spring abutment 8.As Fig. 1, increase the length of submissile spring abutment 8, cause that the gap between submissile spring abutment 8 and the piston 9 reduces, the forced stroke of big little spring tandem working will reduce, cause the brake-pedal travel simulator that first section simulation of pedal displacement and treadle effort relation finished in advance, be fit to the less brake pedal characteristic of slope of slack of pedal less and first section treadle effort and pedal displacement; If shorten the length of submissile spring abutment 8, otherwise then.Increase the length of big spring seat 7, the limit compression stroke when then big spring 5 works independently will reduce, and has reduced the simulation to pedal displacement and treadle effort, is applicable to the situation that the maximum regeneration lock torque is less.
Of the present invention be applied to brake-pedal travel simulator that braking energy reclaims can integrated normally open valve 1, normally closed valve 2 and hydraulic cavities 3 be in one, its compact conformation, volume is little, is convenient to install in the traditional braking system.The brake-pedal travel simulator is connected between master brake cylinder 23 ante-chambers and the hydraulic control unit 28, only needs to adjust brake system control then and just can realize the regenerative brake function, guarantee good brake pedal feel simultaneously.
The principle of work of brake-pedal travel simulator of the present invention:
Consult Fig. 2 and Fig. 3, state is for opening, when not having regenerative brake during normally open valve 1 no power, braking procedure is as the traditional braking system, and braking liquid enters from simulator inlet A, is flowed out by liquid outlet B, do not enter hydraulic cavities 3, and directly enter hydraulic control unit 28.
Consult Fig. 6, a kind of embodiment that described brake-pedal travel simulator 22 is used at brake energy recovering system.In this embodiment, brake-pedal travel simulator 22 is connected between master brake cylinder 23 ante-chambers and the hydraulic control unit 28, is adapted to the hybrid power or the pure electric structure form of motor f-w-d.Brake-pedal travel simulator 22 is connected in the brake circuit, and brake-pedal travel simulator 22 front end oil inlets are connected with a pipeline of master brake cylinder 23, and the rear end is connected a major loop oil inlet of hydraulic control unit 28.During automobile brake, by the on off state of control normally open valve 1 and normally closed valve 2, cooperate the action of hydraulic control unit 28, the liquid of simulating these two wheel cylinders in loop holds characteristic, and realizes the pressure decoupling zero of brake pedal and this loop wheel cylinder.Promptly, normally open valve 1 is opened, and normally closed valve 2 is opened, and two feed liquor valves 30 of front loop cut out, glancing impact, the liquid of master brake cylinder 23 ante-chambers enters hydraulic cavities 3 by normally open valve 1 and normally closed valve 2, and the pressure of braking liquid acts on the left side of piston 9, promotes piston 9 and moves right, compress little spring 4, series connected big spring 5 is also stressed to deform, because two spring series connection, rigidity is little with respect to the rigidity of single spring.Along with the braking liquid that enters hydraulic cavities 3 increases, the bumpar post 20 that is embedded in piston 9 can touch on the submissile spring abutment 8 in the spring perch 19 gradually, elastic deformation no longer takes place in little spring 4 then, serial spring becomes single spring, and it is big that rigidity becomes, and equals the rigidity of big spring 5, piston 9 shift invariants that the same liquid volume produces, it is big that but the hydraulic coupling that produces becomes, and realizes becoming rigidity, as shown in Figure 8.
When needs carry out pressure control to front loop, close normally open valve 1, realize the displacement and the decoupling zero of preceding brake circuit pressure of brake pedal 25, the variation of the pressure of front loop can not influence pedal sense.
Claims (8)
1. one kind is applied to the brake-pedal travel simulator that braking energy reclaims, it is characterized in that the described brake-pedal travel simulator that is applied to the braking energy recovery includes little spring (4), big spring (5), end cap (6), piston (9), cylinder body (10), normally closed valve spool (11), normally closed valve magnet coil (12), normally open valve spool (13), normally open valve magnet coil (14), bump rubber (18) and spring perch (19);
Piston (9) is packed into and is sliding block joint in the piston hole of cylinder body (10) lower end, piston (9) right-hand member is set with little spring (4), spring perch (19) is installed in the spring base hole on piston hole right side, the right-hand member of little spring (4) is sleeved on the submissile spring abutment (8) of spring perch (19) left end, big spring (5) left end is sleeved on the big spring seat (7) of spring perch (19) right-hand member, the right-hand member that end cap (6) is installed in spring base hole is a captive joint, the right-hand member of big spring (5) is sleeved on the annular protrusion of end cap (6) left end center, and the right-hand member of the center ladder cylinder of spring perch (19) is set with bump rubber (18);
In the normally closed vertical hole of normally closed valve spool (11) riveting on cylinder body (10), normally open valve spool (13) riveting often opening in the vertical hole on cylinder body (10), normally closed valve magnet coil (12) is sleeved on the valve rod of normally closed valve spool (11) upper end; Normally open valve magnet coil (14) is sleeved on the valve rod of normally open valve spool (13) upper end.
2. according to the described brake-pedal travel simulator that is applied to the braking energy recovery of claim 1, it is characterized in that, be set with U RunddichtringO (21) among the seal groove D of described piston (9) left end, it is sliding block joint that bumpar post (20) is installed in the centre hole E of piston (9) right-hand member.
3. according to the described brake-pedal travel simulator that is applied to the braking energy recovery of claim 1, it is characterized in that, the right-hand member that described end cap (6) is installed in spring base hole is that captive joint is meant: jump ring (16) is installed in the jump ring groove of spring base hole right-hand member, and the left side of jump ring (16) is connected with the right side contact of end cap (6); Be set with o RunddichtringO (17) in the seal groove of end cap (6) left end.
4. according to the described brake-pedal travel simulator that is applied to the braking energy recovery of claim 1, it is characterized in that, described normally closed valve magnet coil (12) is buckled with electromagnetic valve gland (15) with normally open valve magnet coil (14), adopts the sealant adhesion between electromagnetic valve gland (15) and the cylinder body (10).
5. according to the described brake-pedal travel simulator that is applied to the braking energy recovery of claim 1, it is characterized in that, described cylinder body (10) is a cuboid framing member, the lower end of cylinder body (10) is processed with the horizontally disposed ladder blind hole of forming that is communicated with piston hole by spring base hole, the place, aperture of spring base hole is provided with the jump ring groove, the left upper end of cylinder body (10) is processed with 2 vertical holes side by side, the vertical hole in left side is for installing the normally closed vertical hole of normally closed valve spool (11), vertical hole is often opened for what normally open valve spool (13) was installed in the vertical hole on right side, adopt horizontal oil duct to be communicated with between 2 vertical holes, the normally closed vertical hole in left side and the oil outlet B on cylinder body (10) left side adopt horizontal oil duct to be communicated with, the oil outlet A that often opens on vertical hole and cylinder body (10) aft end face on right side adopts horizontal oil duct to be communicated with, and the piston hole in the horizontally disposed ladder blind hole of the normally closed vertical hole in left side and its below adopts vertical oil duct to be communicated with.
6. according to the described brake-pedal travel simulator that is applied to the braking energy recovery of claim 1, it is characterized in that, described piston (9) is a cylindrical structural spare, piston (9) is by the piston main cylinders, roundlet boss and small cylinder are formed, the left end of piston main cylinders is processed with the seal groove that U RunddichtringO (21) is installed, the right-hand member of piston main cylinders is connected with the roundlet boss that little spring (4) is installed, the right side of roundlet boss is connected with small cylinder, the piston main cylinders, the rotation axis conllinear of roundlet boss and small cylinder, the diameter of piston main cylinders, roundlet boss diameter and small cylinder diameter reduce successively, are processed with the centre hole E that bumpar post (20) is installed on the axis of small cylinder.
7. according to the described brake-pedal travel simulator that is applied to the braking energy recovery of claim 1, it is characterized in that, described spring perch (19) is by submissile spring abutment (8), disc seat, big spring seat (7) is formed with center ladder cylinder, submissile spring abutment (8), disc seat, big spring seat (7) fuses successively with center ladder cylinder, submissile spring abutment (8) is positioned at the left side of disc seat, big spring seat (7) is positioned at the right side of disc seat, center ladder cylinder is positioned at the right side of big spring seat (7), submissile spring abutment (8), disc seat, the rotation axis conllinear of big spring seat (7) and center ladder cylinder, the diameter of submissile spring abutment (8) is less than the diameter of disc seat, disc seat, big spring seat (7) reduces successively with the diameter of center ladder cylinder.
8. according to the described brake-pedal travel simulator that is applied to the braking energy recovery of claim 1, it is characterized in that, described big spring (5) left end is sleeved on the big spring seat (7) of spring perch (19) right-hand member, and formed G face contact is connected with big spring seat (7) and disc seat in the left side of big spring (5);
The right-hand member of described little spring (4) is sleeved on the submissile spring abutment (8) of spring perch (19) left end, and formed F face contact is connected with submissile spring abutment (8) and disc seat in the right side of little spring (4);
Described spring perch (19) is installed in the spring base hole on piston hole right side, and the annular end face contact in the ladder blind hole of submissile spring abutment (8) and formed F face of disc seat and cylinder body (10) lower end is connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310147725.9A CN103223931B (en) | 2013-04-26 | 2013-04-26 | Brake pedal stroke simulator applied to brake energy recovery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310147725.9A CN103223931B (en) | 2013-04-26 | 2013-04-26 | Brake pedal stroke simulator applied to brake energy recovery |
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| CN103223931A true CN103223931A (en) | 2013-07-31 |
| CN103223931B CN103223931B (en) | 2015-04-15 |
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| CN201310147725.9A Expired - Fee Related CN103223931B (en) | 2013-04-26 | 2013-04-26 | Brake pedal stroke simulator applied to brake energy recovery |
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| CN105015531A (en) * | 2015-02-05 | 2015-11-04 | 南京理工大学 | Brake system for vehicle and vehicle having same |
| CN107697042A (en) * | 2016-08-08 | 2018-02-16 | 通用汽车环球科技运作有限责任公司 | The brake pedal emulator and operating method of line control brake system |
| CN107914680A (en) * | 2017-10-30 | 2018-04-17 | 燕山大学 | A kind of half active pedal sense simulator of magnetic force assist type |
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| CN203198950U (en) * | 2013-04-26 | 2013-09-18 | 吉林大学 | Brake pedal travel simulator applied to braking energy recovery |
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| CN102015389A (en) * | 2009-05-25 | 2011-04-13 | 丰田自动车株式会社 | Braking operation device |
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| CN105015531A (en) * | 2015-02-05 | 2015-11-04 | 南京理工大学 | Brake system for vehicle and vehicle having same |
| CN107697042A (en) * | 2016-08-08 | 2018-02-16 | 通用汽车环球科技运作有限责任公司 | The brake pedal emulator and operating method of line control brake system |
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| CN107914680B (en) * | 2017-10-30 | 2020-01-07 | 燕山大学 | Magnetic force auxiliary type semi-active pedal feeling simulator |
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| CN103223931B (en) | 2015-04-15 |
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