CN209410038U - A kind of intelligent brake force aid system of motor driven and ECU control - Google Patents

Abstract

A kind of intelligent brake force aid system of motor driven and ECU control, it includes controller (69), electric brake actuator (70) and The vehicle stabilization servicing unit (64), the controller (69) connects electric brake actuator (70), the electric brake actuator (70) is also connected with The vehicle stabilization servicing unit (64), the controller includes ECU component (18), lubricating cup (28), stroke simulator (32), hydraulic main cylinder (33), ECU component (18), the ECU component (18) connects hydraulic main cylinder (33), the hydraulic main cylinder (33) is also connected with stroke simulator (32), hydraulic main cylinder (33) includes lubricating cup (28).Motor driven described in the utility model and the intelligent brake force aid system system of ECU control use motor driven, and ECU control may be mounted on the vehicle of automatic Pilot, be a kind of future developing trend.

Description

A kind of intelligent brake force aid system of motor driven and ECU control

Technical field

The present invention relates to the intelligent brake force aid systems of a kind of motor driven and ECU control, belong to field of automobile brake.

Background technique

With the continuous progress of technology, electric driving machine is applied in large quantities in the car, for electronic driver or is mixed The vehicle for closing power drive unit is verified, and the brake actuator of electric drive vehicle or hybrid vehicle makes conventional braking Hydraulic system becomes extra, and vehicle driver, which does as usual, operates the brake pedal of vehicle, but it overcomes spring or by spring generation Elastic force generates the feeling of similar conventional vehicular brake pedal.In the control unit of vehicle, brake pedal is trampled by driver Power calculates the brake force for each wheel of vehicle, generates the compression of brake unit by control unit at single wheel Power.However, currently, the development of the control unit about motor-driven brake actuator and immature.Be badly in need of a kind of stabilization, can It leans on and brake actuator control unit that endurance is strong fills up technological gap.

Application No. is 201610963083.3 Chinese invention patent applications to disclose a kind of brake booster, including is made Move pedal-driven and the input lever moved axially forward and the power-assisted that the rotating drive movements of motor are converted into linear motion Push piece, it is characterised in that: be equipped between the input lever and power-assisted push piece for measuring input lever and power-assisted push piece relative travel Relative displacement detection device, the relative displacement detection device include the first displacement sensor, the first magnetite and connection electric wire, First displacement sensor and the first magnetite is oppositely arranged and mutual induction, first displacement sensor and power-assisted push piece connect It connects, first magnetite is connect with input lever.It is equipped with relative displacement detection device between input lever and power-assisted push piece, utilizes phase The relative displacement of input lever and power-assisted push piece in braking process is capable of detecting when to displacement detector, so that ECU control electricity Machine driving power-assisted push piece is moved, and accuracy is improved.But its response speed is slower, and structure is not compact enough.

Summary of the invention

First aspect present invention provides the intelligent brake force aid system of a kind of motor driven and ECU control comprising control Device, electric brake actuator and The vehicle stabilization servicing unit, the controller connect electric brake actuator, which holds Row device is also connected with The vehicle stabilization servicing unit, and the controller includes ECU component, lubricating cup, stroke simulator, hydraulic main cylinder.

The ECU component, the ECU component connect hydraulic main cylinder, which is also connected with stroke simulator, described hydraulic Master cylinder includes lubricating cup, and the hydraulic main cylinder and the stroke simulator further include output connection in cylinder body, above the cylinder body Port I, output connection port II, delivery outlet I and delivery outlet II, wherein output connection port I and output connection port II series connection It connects, delivery outlet I is connected with delivery outlet II series connection.

The ECU component includes electronic control unit (Electronic Control Unit, be abbreviated as ECU), the electronics Control unit connects normal-open electromagnetic valve A1, normal-open electromagnetic valve A2 and normal-closed electromagnetic valve A3, the electronic control unit It is also connected with pressure sensor Pm and pressure sensor Pp.

It include shell outside the ECU component.ECU component, which is screwed, is installed on cylinder body top.

Stroke simulator includes simulator positioning piston, also sets up piston on the left of simulator positioning piston, the piston is right End setting positioning sleeve II, is arranged elastic device between the positioning sleeve II connecting positioning sleeve I, positioning sleeve I and the positioning piston, Chamber VI is constituted between positioning sleeve I and the positioning piston, includes sealing device on the outside of the positioning piston, the positioning piston Right end further includes simulator retaining ring.

Preferably, the stroke simulator is below cylinder interior.

It is further preferred that being equipped with sealing device between the piston and the cylinder body.

Hydraulic main cylinder includes master cylinder piston I, and master cylinder piston I connects master cylinder piston II by elastic device, and the master cylinder is living Filling in inside II further includes that magnet ring is fixed, which, which fixes between the master cylinder piston II, also sets up magnet ring I, magnet ring II and sealing Device, the end of the master cylinder piston II also set up master cylinder retaining ring, and the end the master cylinder piston II also sets up bracket connecting shaft, should Bracket connects shaft end and connects mounting bracket.

The magnet ring fixation is also connected with displacement sensor, which is additionally coupled to electronic control unit (ECU), with Just the magnetic field variation signal of magnet ring is transmitted to each component.

The master cylinder piston I is inlaid in the cylinder body.

Master cylinder reset spring I is housed between the master cylinder piston I and the cylinder body, is equipped on the left of master cylinder reset spring I Master cylinder spring positioning pedestal is connected between the master cylinder piston I and the master cylinder spring positioning pedestal by bolt II.

It is further preferred that being also connected with master cylinder bolt bush between the master cylinder piston I and bolt II.

Preferably, the magnet ring is embedded in the groove of the master cylinder piston II to fix.

Preferably, the master cylinder piston II is flush-mounted in the middle part of cylinder body, and is located at the upper portion of the stroke simulator Position is equipped with sealing element between the master cylinder piston II and cylinder body.

Be installed on four cup seals on master cylinder piston I and master cylinder piston II by master cylinder body physical separation coelosis I, Chamber II, chamber III, chamber IV.

The chamber II is connected with delivery outlet I, delivery outlet II, and normal-open electromagnetic valve A1 is sequentially installed on their pipeline (being open position when being not powered on), pressure sensor Pp.

Chamber II is connected with chamber V, and normal-closed electromagnetic valve A3 (being closed position when being not powered on) is equipped on their pipeline.

Chamber IV is connected with output connection port I, output connection port II, and pressure biography is sequentially installed on their pipeline Sensor Pm, normal-open electromagnetic valve A2 (being open position when being not powered on).

Lubricating cup is located at the side of cylinder body, is connected by bolt and cylinder body, while lubricating cup is equipped with cylinder body connector Rubber seal ring is sealed.

The electric brake actuator includes motor, braking lubricating cup, driving mechanism, hydraulic pump, and the driving mechanism includes: Gear-box rear cover, ball screw axis, rolling bearing, gear II, gear I, gear box casing, ball screw nut, inner shield ring I, Housing seal circle I, screw rod positioning sleeve, screw rod positioning pin, the ball screw shaft end are equipped with screw rod positioning pin, the ball screw For a part and screw rod set pin sleeve of axis loaded in screw rod positioning sleeve, the end of the screw rod positioning sleeve is resisted against gear-box rear cover Inside, the head end of the screw rod positioning sleeve also set up ball screw nut, are set with rolling bearing on the outside of the ball screw nut, It is also equipped with gear II on the outside of the ball screw nut, gear II is engaged with the gear I that the driving shaft end of motor is set with, institute State gear-box rear cover connection gear tank shell.

Gear II, ball screw nut, rolling bearing become a component by interference or other fixed forms. Screw rod positioning sleeve is cooperated by interference or other fixed forms with gear-box rear cover.

Motor is located at gear box casing left end, gear I and motor with a component is synthesized, and realizes transmission agency.

Hydraulic pump is located at the left end of driving mechanism, is staggered with motor, and the hydraulic pump includes the pump housing, the pump housing and driving machine Gear box casing connection in structure, hydraulic pump further includes limited screw, reset spring II, relay piston I, piston fixed pin, cup It is shape sealing element I, piston stopper pin, cup seal II, spring base I, relay piston II, reset spring I, spring base II, driven Piston I II.Pump is equipped with delivery outlet V and delivery outlet VI, oil inlet I and oil inlet II；Cup-shaped is housed on the relay piston III The left end sealing element I, relay piston III is sequentially arranged with spring base II, reset spring II, relay piston I, piston fixed pin, piston Stopper pin, relay piston II, reset spring I；Relay piston I is linked together by limited screw and relay piston III, driven Piston I and relay piston II are fixed together by piston fixed pin, become a component, the adjustable reset of limited screw The starting force of spring II.

Reset spring I is set gradually in the pump housing from left to right, one end of reset spring I is set in relay piston II Left end, the right end of relay piston II connects relay piston I；

Chamber V is constituted between the left end relay piston II and the pump housing, is constituted between the pump housing in the middle part of the relay piston III Chamber IV, relay piston II include hydraulic port, the relay piston II Inner Constitution chamber III, the outside relay piston II and institute State composition chamber II between the pump housing.It is also equipped with relay piston III in the pump housing of the relay piston II right end, relay piston III Reset spring II is set between the relay piston II, chamber III is constituted between relay piston III and the pump housing.

Cylinder body is divided into chamber I, chamber II, chamber III, chamber IV, chamber V by above-mentioned cup seal I and cup seal II everywhere Totally five chambers, the flow direction of brake fluid is all unidirectional between adjacent chamber.

The relay piston III right end includes groove, and the optical axis portion of ball screw axis left end is accommodated in the groove.

It further include at least one oil inlet and at least one oil outlet on the pump housing, the oil inlet is connected to the lubricating cup.

Braking lubricating cup is located at the top of hydraulic pump.

Second aspect of the present invention provides the working method of a kind of motor driven and the intelligent brake force aid system of ECU control, Method includes the following steps:

Step S1: controller, electric brake actuator and The vehicle stabilization servicing unit by hose or tubing by being formed Hydraulic pressure road be attached；The output of the output connection port I, output connection port II and electric brake actuator of controller Mouth V is connected to c point, then accesses The vehicle stabilization servicing unit.Delivery outlet I, delivery outlet II and the electric brake actuator of controller Delivery outlet VI be connected to d point, then access The vehicle stabilization servicing unit.

Step S2: displacement sensor detects the mobile changes of magnetic field generated of magnet ring I, magnet ring II, and transfers signals to electricity Sub-control unit (ECU), electronic control unit (ECU) output signal control each component work；

Step S3: chamber II is connected with delivery outlet I, delivery outlet II, is sequentially installed with open type on their connecting line Solenoid valve A1, normal-open electromagnetic valve A1 is open position, pressure sensor Pp when being not powered on；Chamber II is connected with chamber V, they Normal-closed electromagnetic valve A3 is installed, normal-closed electromagnetic valve A3 is closed position when being not powered on connecting line；Chamber IV and output connect Port I, output connection port II are connected, and pressure sensor Pm, open type electromagnetism are sequentially installed on their connecting line Valve A2, normal-open electromagnetic valve A2 is open position when being not powered on.

Step S4: stroke simulator assigns stroke and counter-force, and operator is made to feel the dress for seemingly generating brake force with legpower It sets.The chamber V of stroke simulator is connected with chamber II, absorbs the brake fluid derived from chamber II.

Brake pedal, mounting bracket are connect with brake pedal, and bracket connecting shaft is pushed to be moved to the left, and are pushed by master cylinder The component that piston II, magnet ring I, magnet ring fix, magnet ring II, sealing ring II are fastenedly connected by bolt III sliding compression to the left Master cylinder reset spring II, while chamber II is compressed, hydraulic increase, normal-closed electromagnetic valve A3 is closed position when being not powered on, after energization Then in the open state, chamber II brake fluid is pressed into chamber V.

Step S5: chamber II is connected with delivery outlet I, delivery outlet II, in electric brake actuator work, is located at its pipeline On normal-open electromagnetic valve A1 energization be in close state, at this time delivery outlet I, delivery outlet II brakeless liquid output；

There is the oil return hole of a circle on the left of master cylinder piston II, the position of oil return hole is located at two Cup-shaped seal circles when original state Between (i.e. chamber I), when master cylinder piston II is moved to the left by promotion, but before oil return hole is less than left side Cup-shaped seal circle, chamber at this time II is compressed by small range, and chamber II brake fluid pressure is greater than lubricating cup pressure, and chamber II is to lubricating cup indentation brake fluid until master cylinder piston II The oil return hole in left side passes through left side Cup-shaped seal circle；

Step S6: simulator reset spring I and simulator of the stroke simulator right-side cavity VI configured with arranged in series reset Spring II applies spring force on emulator piston, when brake pedal is stepped on, applies a counter-force and passes sequentially through simulator work Plug, brake fluid, master cylinder piston II are transmitted to brake pedal, and the deeper reaction force stepped on is bigger, generate system to operator with legpower The feeling of power；

Step S7: master cylinder piston I left side structure limits its sliding scale, and preventing master cylinder piston I, excessive slip is compressed to the right Chamber II, the structure carry out fastening company by bolt II by master cylinder spring positioning pedestal, master cylinder reset spring I, master cylinder bolt bush It is connected into a component；

Step S8: when chamber II is constantly compressed, chamber II is hydraulic to be gradually increased, while master cylinder reset spring II is also compressed, Spring force increases, when active force is greater than left side active force on the right side of master cylinder piston I, Slideslip and compression chamber IV to the left, chamber IV with Output connection port I, output connection port II are connected, normally opened on its pipeline in electric brake actuator work Type solenoid valve A2 energization is in close state, at this time output connection port I, the output of output connection port II brakeless liquid；

There is the oil return hole of a circle on the left of in the of step S9: master cylinder piston I, the position of oil return hole is located at two cup-shapeds when original state Between sealing ring (i.e. chamber III), be moved to the left when master cylinder piston I is pushed, but oil return hole be less than left side Cup-shaped seal circle before, Chamber III is compressed by small range at this time, and chamber III brake fluid pressure is greater than lubricating cup pressure, and chamber III is to lubricating cup indentation brake fluid until main Oil return hole on the left of the cylinder piston I passes through left side Cup-shaped seal circle；

Step S10: release brake pedal, master cylinder piston II slide to the right the release space chamber II, the hydraulic reduction of chamber II, chamber V The hydraulic chamber II that is greater than is hydraulic, V brake fluid back cavity II of chamber, has oil return hole on the left of master cylinder piston II, when master cylinder piston II is slided to the right Dynamic, after the cup seal on the left of oil return hole transit chamber I thereon, lubricating cup discharges brake fluid to chamber II.As chamber II is hydraulic and II spring force of master cylinder reset spring reduces, and active force is greater than right side on the left of master cylinder piston I, and master cylinder piston I is slided to the right, discharges chamber IV space, while compressed master cylinder reset spring I is gradually recovered original state, when the oil return hole of master cylinder piston I upper left side is logical After crossing the cup seal on the left of chamber III, lubricating cup discharges brake fluid to chamber IV；Whole device restPoses；

Step S11: brake pedal is stepped on, and control system rotates motor according to the signal of sensor；Drive is mounted on electricity Gear I rotation on machine output shaft；

Step S12: gear I rotation drives the gear II rotation being engaged with, and ball screw nut is matched with gear II interference It is combined together rotation, realizes that ball screw axis horizontally slips, when braking, ball screw axially left sliding；Limited screw with it is driven Piston I II, which is together by a threaded connection, to be slid left and right；

Step S13: brake fluid respectively enters chamber i, chamber iv through oil inlet from lubricating cup, and through cup seal I, Cup-shaped seal Part II reaches chamber ii；

Step S14: ball screw axially left sliding drives relay piston III to slide together to the left with limited screw, limits Screw slides to the left, and the space compression chamber iii leads to the hydraulic increase of chamber iii, and brake fluid is orally pressed into chamber ii, at the same time, due to Relay piston III moves downward compression chamber ii, leads to hydraulic increase, and chamber ii brake fluid is exported from delivery outlet VI；

Step S15: relay piston I, relay piston II is attached by piston fixed pin, relay piston I, relay piston II, piston fixed pin three slide left and right together；The sliding of the piston stopper pin limitation relay piston II of relay piston II Range prevents relay piston II from excessively sliding to the right；As a result, especially when intelligent hydraulic force aid system fails, use is hydraulic When formula is braked, when a thrashing, another system is prevented to fail, starting protection effect；

Step S16: brake pedal release releases braking, and control system keeps motor reversed according to the signal of Hall sensor Rotation drives the gear I rotation being mounted on motor output shaft；Gear I rotation drives the gear II rotation being engaged with, ball Feed screw nut presses to gear II interference and rotates together, and realizes that ball screw is axially right and slides at this point, on the left of relay piston III Pressure is greater than right side, and relay piston III is also slided to the right together, and reset spring II gradually resets, and spring force gradually reduces, this When, piston component left pressure is greater than right atrial pressure, and piston component to the right make by Slideslip, chamber v, chamber ii, the hydraulic reduction of chamber iii Hydrodynamic is back to chamber v, chamber ii, chamber iii from oil outlet, and for braking lubricating cup release supplement brake fluid to chamber iv, chamber i, chamber iv, chamber i are logical It crosses cup seal I, cup seal II and brake fluid is supplemented to chamber v, chamber ii, chamber iii, be finally reached original state；

Using piston component as object, when not starting braking, piston component is in the rightmost side, and reset spring I acts on work The power of plug assembly is more than or equal to the power that reset spring II acts on piston component.When braking, relay piston III compression chamber ii to the left And reset spring II, when pressure is greater than left side pressure on the right side of piston component, piston component slides to the left, compression chamber V, leads to hydraulic increase, and chamber v brake fluid is exported from delivery outlet V；

Successively execute step S1- step S16.

When electric brake actuator failure, brake actuator of the present apparatus as the fluid pressure type of insurance.At this point, open type Solenoid valve A1, normal-open electromagnetic valve A2, normal-closed electromagnetic valve A3 are all off-position, and normal-open electromagnetic valve A1 is connected, delivery outlet I, delivery outlet II exports brake fluid to The vehicle stabilization servicing unit.Normal-open electromagnetic valve A2 is connected, output connection port I, output Connectivity port II exports brake fluid to The vehicle stabilization servicing unit.Normal-closed electromagnetic valve A3 is closed, stroke simulator brakeless liquid Input, does not work.

The motor driven has wire controlled braking system and hydraulic with the intelligent brake force aid system that ECU is controlled in the past Both formula braking systems constitute, wire controlled braking system as it is usual when use, the braking system of fluid pressure type is as fail-safe Shi Yong.The seperated ground of this system is made of controller, electric brake actuator and The vehicle stabilization servicing unit, and controller is operator The device of its operation is inputted when operating brake pedal, electric brake actuator receives controller signals and generates brake fluid pressure.

Motor driven described in first aspect present invention and the intelligent brake force aid system of ECU control use second party of the present invention The working method of motor described in face and the intelligent brake force aid system of ECU control completes work.

The intelligent brake force aid system that motor driven of the present invention is controlled with ECU has the positive effect that:

1. using motor driven, fast response time, the response time is 120 milliseconds to 150 milliseconds or so, than ESP module Response time want 200 to 300 milliseconds short.

2. system uses motor driven, it is that a kind of future development becomes that ECU control, which may be mounted on the vehicle of automatic Pilot, Gesture.

3. compact-sized, each unit is highly integrated compared with traditional vacuum booster system, components cost is reduced, Also there is certain reduction in size and weight, meets the trend of present development of automobile.

4. DC brushless motor used in this system designs a kind of fuzzy PID control strategy of parameter adaptive, gram The parameter of the parameter and dragging load that take traditional motor itself can change in the process of running, so that preset parameter The shortcomings that PID controller cannot make system all keep performance indicator when designing under various operating conditions.

5. this system devises simulator structure, when brake pedal is stepped on, applies a counter-force and pass sequentially through simulator Piston, brake fluid, master cylinder piston two are transmitted to brake pedal, and the deeper reaction force stepped on is bigger, are generated to operator with legpower The feeling of brake force.

6. this system is designed by special structure, realize that the variation of hydraulic coupling is hardly influenced by pedal force, realizes The decoupling of hydraulic coupling and pedal force.Front half section motor does not act on, and pedal force increases, and hydraulic coupling increases minimum；Second half section motor Effect, hydraulic fluctuation, pedal force remain unchanged.

Detailed description of the invention

Fig. 1 is a kind of section knot of a preferred embodiment of the control unit of motor driven brake actuator of the present invention Structure schematic diagram；

Fig. 2 is the external structure schematic diagram of embodiment illustrated in fig. 1；

Fig. 3 is each component connection relationship diagram of embodiment illustrated in fig. 1；

Fig. 4 is the working principle diagram of embodiment illustrated in fig. 1；

Numeral mark is meant that in Fig. 1-Fig. 4:

1 mounting bracket, 2 bracket connecting shaft, 3 cylinder body, 4 simulator retaining ring, 5 sealing ring I

6 simulators position 78 bolt I of simulator reset spring I of piston, 9 simulator positioning sleeve I

10 simulator reset spring II, 11 12 emulator piston of simulator positioning sleeve II, 13 master cylinder spring positioning pedestal

14 bolt II, 15 16 master cylinder bolt bush of master cylinder reset spring I, 17 master cylinder piston I

19 20 master cylinder piston II of master cylinder reset spring II of 18ECU component, 21 cup seal

22 bolt III, 23 magnet ring I, 24 magnet ring fixes 25 magnet ring II, 26 sealing ring II

27 master cylinder retaining ring, 28 lubricating cup, 29 hall displacement transducer 30a output connection port I

32 stroke simulator of 30b output connection port II 31a delivery outlet I 31b delivery outlet II

33 hydraulic main cylinder, 34 gear-box rear cover, 35 ball screw axis, 36 rolling bearing

37 gear II, 38 gear I, 39 gear box casing, 40 motor, 41 limited screw

42 reset spring II, 43 relay piston I, 44 piston fixed pin, 45 cup seal I

46 piston stopper pin, 47 cup seal II, 48 spring base I, 49 relay piston II

50 reset spring I, 51 pump housing, 52 lubricating cup sealing element 53 brakes lubricating cup

54 spring base II, 55 relay piston III 56O type sealing ring, 57 ball screw nut

58 inner shield ring I, 59 60 screw rod positioning sleeve of housing seal circle I, 61 screw rod positioning pin

62 driving mechanism, 63 hydraulic pump, 64 The vehicle stabilization servicing unit, 65 delivery outlet V

66 delivery outlet VI, 67 lubricating cup delivery outlet 68 brakes 69 controller of lubricating cup input port

70 electric brake actuator, 72 oil inlet I, 73 oil inlet II.

Specific embodiment

Embodiment 1.1: the intelligent brake force aid system of a kind of motor driven and ECU control comprising controller 69, electronic Brake actuator 70 and The vehicle stabilization servicing unit 64, controller 69 connect electric brake actuator 70, which executes Device 70 is also connected with The vehicle stabilization servicing unit 64, and controller 69 includes ECU component 18, which connects hydraulic main cylinder 33, should Hydraulic main cylinder 33 is also connected with stroke simulator 32, and hydraulic main cylinder 33 includes lubricating cup 28, and hydraulic main cylinder 33 and stroke simulator 32 fill In cylinder body 3, further include above the cylinder body 3 output connection port I 30a, output connection port II 30b, delivery outlet I 31a and Delivery outlet II 31b, wherein output connection port I 30a and output connection port II 30b series connection are connected, delivery outlet I 31a with Delivery outlet II 31b series connection is connected, and includes lubricating cup delivery outlet 67 on lubricating cup 28, which is connected to braking lubricating cup 53 Braking lubricating cup input port 68.

As shown in Figure 1, ECU component 18 includes that (Electronic Control Unit, is abbreviated as electronic control unit ECU), electronic control unit connection normal-open electromagnetic valve A1, normal-open electromagnetic valve A2 and normal-closed electromagnetic valve A3, the electricity Sub-control unit is also connected with pressure sensor Pm and pressure sensor Pp.Plastic casing, ECU are wrapped up outside the ECU component 18 Component 18 is screwed in 3 top of cylinder body.

Stroke simulator 32 includes that simulator positions piston 6, also sets up piston 12 on the left of simulator positioning piston 6, should Positioning sleeve II 11 is arranged in 12 right end of piston, and positioning sleeve II 11 connecting positioning sleeve I 9, positioning sleeve I 9 and the positioning are lived Reset spring I 7 is set between plug 6, constitutes chamber VI between positioning sleeve I 9 and positioning piston 6, positioning includes sealing on the outside of piston 6 I 5 is enclosed, the right end of positioning piston 6 further includes simulator retaining ring 4.

Positioning sleeve II 11 is connect with positioning sleeve I 9 by bolt I 8, is equipped between positioning sleeve II 11 and positioning sleeve I 9 Reset spring II 10.

The section of positioning sleeve II 11 and positioning sleeve I 9 is " several " character form structure.

Stroke simulator 32 is flush-mounted in 3 lower inside of cylinder body.

Cup seal 21 is housed between piston 12 and the cylinder body 3.

Sealing ring I 5 is mounted on simulator positioning piston 6, plays the role of VI brake fluid of seal chamber.

Positioning sleeve II 11 is fixed by bolt I 8 and connects into a component.Cup seal 21 and simulator are living 12 cooperation of plug is played the role of for brake fluid being sealed in 21 left side of cup seal.

Hydraulic main cylinder 33 includes master cylinder piston I 17, and master cylinder piston I 17 is led by the connection of master cylinder reset spring II 19 It further include that magnet ring fixes 24 inside the cylinder piston II 20, master cylinder piston II 20, which fixes 24 and the master cylinder piston II Magnet ring I 23, magnet ring II 25 and sealing ring II 26 are also set up between 20, the end of master cylinder piston II 20 also sets up master cylinder retaining ring 27,20 end master cylinder piston II also sets up bracket connecting shaft 2, which connects mounting bracket 1.

Magnet ring fixes 24 and is also connected with hall displacement transducer 29, and it is single which is additionally coupled to electronic control First (ECU), so that the magnetic field variation signal of magnet ring is transmitted to each component.

Master cylinder piston I 17 is inlaid in the cylinder body 3,

Master cylinder reset spring I 15 is housed, master cylinder reset spring I 15 is left between master cylinder piston I 17 and the cylinder body 3 Side is equipped with master cylinder spring positioning pedestal 13, passes through bolt between the master cylinder piston I 17 and the master cylinder spring positioning pedestal 13 The connection of II 14.

Master cylinder bolt bush 16 is also connected between master cylinder piston I 17 and bolt II 14.

Master cylinder spring positioning pedestal 13, master cylinder reset spring I 15, master cylinder bolt bush 16 are carried out tightly by bolt II 14 It is connected and is connected into a component.

The end that magnet ring fixes 24 includes a depth and groove of same size, and the cross section of the groove is square, should Bracket connecting shaft 2 is embedded in groove, one end which is embedded in groove is ballhead, which connect with bracket It further include a circle spill ring between the main body of axis 2, the other end of bracket connecting shaft 2 connects mounting bracket 1.

The cross section of master cylinder piston II 20 is I-shaped structure, i.e. the both ends of master cylinder piston II 20 include groove. It is embedded in the magnet ring in the groove of 20 one end master cylinder piston II and fixes 24, and the master cylinder piston II 20 is fixed with the magnet ring Pass through the connection of bolt III 22 between 24.

Master cylinder piston II 20 is flush-mounted in the middle part of cylinder body 3, and is located at the top position of the stroke simulator, the master Cup seal 21 is housed between the cylinder piston II 20 and cylinder body 3.

Four cup seals 21 being installed on master cylinder piston I 17 and master cylinder piston II 20 divide 3 physics of master cylinder body It is divided into chamber I, chamber II, chamber III, chamber IV.

The chamber II is connected with I 31a of delivery outlet, II 31b of delivery outlet, and open type electricity is sequentially installed on their pipeline Magnet valve A1, pressure sensor Pp.

Chamber II is connected with chamber V, and normal-closed electromagnetic valve A3 is equipped on their pipeline.

Chamber IV is connected with I 30a of output connection port, II 30b of output connection port, is sequentially installed on their pipeline Pressure sensor Pm, normal-open electromagnetic valve A2.

It is tight by bolt III 22 that master cylinder piston II 20, magnet ring I 23, magnet ring fix 24, magnet ring II 25, sealing ring II 26 It is connected and is connected into a component.

Sealing ring II 26 is installed on magnet ring and fixes on 24, plays the role of sealing and dustproof.

Lubricating cup 28 is located at the side of cylinder body 3, is connected by bolt and cylinder body 3, while lubricating cup 28 and 3 connector of cylinder body Rubber seal ring is installed to be sealed.

As shown in Fig. 2, electric brake actuator 70 includes including motor 40, braking lubricating cup 53, driving mechanism 62, hydraulic pump 63, driving mechanism 62 as described in Figure 2 includes: gear-box rear cover 34, ball screw axis 35, rolling bearing 36, gear II 37, tooth Take turns I 38, gear box casing 39, ball screw nut 57, inner shield ring I 58, housing seal circle I 59, screw rod positioning sleeve 60, silk Bar positioning pin 61,35 end of ball screw axis are equipped with screw rod positioning pin 61, and a part and screw rod of the ball screw axis 57 position Pin 61 is set in screw rod positioning sleeve 60, and the end of screw rod positioning sleeve 60 is resisted against inside gear-box rear cover 34, screw rod positioning sleeve 60 head end also sets up ball screw nut 57, and inner shield ring I 25 is arranged between screw rod positioning sleeve 60 and ball screw nut 57, 57 outer sheath of ball screw nut, two dress rolling bearings 36 are also equipped with gear II 37 on the outside of ball screw nut 57, the gear II 37 is engaged with the gear I 38 that the driving shaft end of motor 40 is set with, 34 connection gear tank shell 39 of gear-box rear cover, the tooth Wheel tank shell 39 is also set on the outside of the output shaft of motor 40, and gear box casing 39 coats gear II 37 and gear I 38 Wherein.Gear box casing 39 and gear-box rear cover 34 are attached by bolt, and are sealed with housing seal circle I 59.Tooth It takes turns tank shell 39 and is equipped with gear I 38, gear II 37, rolling bearing 36, ball screw nut 57.Gear II 37 and ball wire Bar axis 35 is connected by ball screw nut 57, and is supported with rolling bearing 36.Gear II 37, it ball screw nut 57, rolls Bearing 36 is interference fitted, and becomes a component.Screw rod positioning sleeve 60 and gear-box rear cover 34 are interference fitted, screw rod positioning pin 61 It is interference fitted with ball screw axis 35, in its right end, slot of the ball screw axis 35 on screw rod positioning sleeve 60 is made to carry out left and right cunning It is dynamic, it does not rotate.

Motor 40 is located at 39 left end of gear box casing.Motor 40 is bolted on the gear box casing in driving mechanism On 39, gear I 38 and machine shaft become a component, realize transmission agency by interference fit.

Hydraulic pump 63 is located at the left end of driving mechanism 62, is staggered with motor 40, and the hydraulic pump 63 includes the pump housing 51, the pump Body 51 is connect with the gear box casing 39 in driving mechanism by flange face, on the outside of 51 right end of the pump housing between gear box casing 39 Equipped with O-ring seal 56, hydraulic pump 63 further includes that limited screw 41, reset spring II 42, relay piston I 43, piston are fixed Pin 44, piston stopper pin 46, cup seal II 47, spring base I 48, relay piston II 49, is answered cup seal I 45 Position spring I 50, spring base II 54, relay piston III 55.The pump housing 51 is equipped with delivery outlet V 65 and delivery outlet VI 66, oil inlet Mouth I 72 and oil inlet II 73；On relay piston III 55 be equipped with cup seal I 45 and cup seal II 47, two Sealing element plays the role of one-way sealing, 55 left end relay piston III be sequentially arranged with spring base II 54, reset spring II 42, Relay piston I 43, piston fixed pin 44, piston stopper pin 46, relay piston II 49, reset spring I 50；Relay piston I 43 are linked together by limited screw 41 and relay piston III 55, and relay piston I 43 and relay piston II 49 pass through work Plug fixed pin 44 is fixed together, and becomes a component, the starting force of the adjustable reset spring II 42 of limited screw 41.

Set gradually reset spring I 50 from left to right in the pump housing 18, one end of reset spring I 50 be set in from The right end of the left end of piston II 49, relay piston II 49 connects relay piston I 43.

Piston fixed pin 44 is arranged in the junction of relay piston II 49 and relay piston III 55, and relay piston II 49 is left End also sets up cup seal II 47, is also equipped with spring base between 49 left end relay piston II and reset spring II 42 II 54。

Chamber v is constituted between 49 left end relay piston II and the pump housing 51, cup seal is arranged in 55 right end of relay piston III Chamber iv is constituted between 55 middle part II 47, relay piston III and the pump housing 51,

Relay piston II 49 includes hydraulic port 43a, outside relay piston II 49 Inner Constitution chamber iii, relay piston II 49 Chamber ii is constituted between portion and the pump housing 51, is connected between hydraulic port 43a and chamber iii and chamber ii.10 right end of relay piston II It is also equipped with relay piston III 55 in the pump housing 51, reset spring is set between relay piston III 55 and relay piston II 49 II 42 constitutes chamber iii between relay piston III 55 and the pump housing 51.

Cylinder body is divided into chamber i, chamber ii, chamber iii, chamber by above-mentioned cup seal I 45 and cup seal II 47 everywhere Iv, chamber v totally 5 chambers, the flow direction of brake fluid is all unidirectional, direction as shown by the arrows in Figure 2 between adjacent chamber.

The reset spring II 42 is resisted against 55 left end relay piston III, the relay piston by spring base II 54 55 left end III also sets up cup seal II 47, and limit spiral shell is also set up between relay piston III 55 and relay piston II 49 Silk 41.The right end of relay piston III 55 also is provided with cup seal II 47, and 55 right end of relay piston III includes groove, should The optical axis portion of 35 left end of ball screw axis is accommodated in groove.

It further include at least one oil inlet and at least one oil outlet on the pump housing 51, the oil inlet and the lubricating cup connect It is logical.

Braking lubricating cup 53 is located at the top of hydraulic pump 63, is connected by bolt and the pump housing 51, while close by lubricating cup Sealing 52 seals the pump housing 51.

Embodiment 2.1: a kind of working method of motor driven and the intelligent brake force aid system of ECU control, this method packet Include following steps:

Step S1: displacement sensor 29 detects the mobile changes of magnetic field generated of magnet ring I 23, magnet ring II 25, and signal is passed Defeated to arrive electronic control unit (ECU), electronic control unit (ECU) output signal controls each component work；

Step S2: chamber II is connected with delivery outlet I 31a, delivery outlet II 31b, successively installs on their connecting line There is normal-open electromagnetic valve A1, normal-open electromagnetic valve A1 is open position, pressure sensor Pp when being not powered on；Chamber II is connected with chamber V, Normal-closed electromagnetic valve A3 is installed, normal-closed electromagnetic valve A3 is closed position when being not powered on their connecting line；Chamber IV with it is defeated Connectivity port I 30a, output connection port II 30b are connected out, are sequentially installed with pressure sensor on their connecting line Pm, normal-open electromagnetic valve A2, normal-open electromagnetic valve A2 is open position when being not powered on.

Step S3: stroke simulator 32 assigns stroke and counter-force, and operator is made to feel seemingly to generate brake force with legpower Device.The chamber V of stroke simulator 32 is connected with chamber II, absorbs the brake fluid derived from chamber II.

Brake pedal, mounting bracket 1 are connect with brake pedal, and bracket connecting shaft 2 is pushed to be moved to the left, and are pushed by leading The cylinder piston II 20, magnet ring I 23, magnet ring fix 24, magnet ring II 25, sealing ring II 26 is fastenedly connected by bolt III 22 Component sliding compression master cylinder reset spring II 19 to the left, while chamber II is compressed, hydraulic increase, normal-closed electromagnetic valve when being not powered on A3 is closed position, then in the open state after energization, and chamber II brake fluid is pressed into chamber V.

Step S4: chamber II is connected with delivery outlet I 31a, delivery outlet II 31b, in electric brake actuator work, position It is in close state in the normal-open electromagnetic valve A1 energization on its pipeline, at this time delivery outlet I 31a, delivery outlet II 31b brakeless Liquid output；

There is an oil return hole of a circle in the left side of master cylinder piston II 20, and the position of oil return hole is located at two Cup-shaped seals when original state Between circle 21 (i.e. chamber I), when master cylinder piston 2 II 20 is moved to the left by promotion, but oil return hole is less than left side Cup-shaped seal circle 21 Before, chamber II is compressed by small range at this time, and chamber II brake fluid pressure is greater than 28 pressure of lubricating cup, and chamber II is straight to the indentation brake fluid of lubricating cup 28 Oil return hole to 20 left side master cylinder piston II passes through left side Cup-shaped seal circle 21；

Step S5: 32 right-side cavity VI of stroke simulator is configured with the simulator reset spring I 7 and simulator of arranged in series Reset spring II 10 applies spring force on emulator piston 12, when brake pedal is stepped on, applies a counter-force and pass sequentially through Emulator piston 12, brake fluid, master cylinder piston II 20 are transmitted to brake pedal, and the deeper reaction force stepped on is bigger, give operator The feeling of brake force is generated with legpower；

Step S6: master cylinder piston I 17 left side structure limits its sliding scale, prevents master cylinder piston I 17 excessively sliding to the right Dynamic compression chamber II, the structure pass through bolt by master cylinder spring positioning pedestal 13, master cylinder reset spring I 15, master cylinder bolt bush 16 II 14 is fastenedly connected into a component；

Step S7: when chamber II is constantly compressed, chamber II is hydraulic to be gradually increased, while master cylinder reset spring II 19 is also pressed Contracting, spring force increase, when 17 right side active force of master cylinder piston I is greater than left side active force, Slideslip and compression chamber IV to the left, Chamber IV is connected with output connection port I 30a, output connection port II 30b, in electric brake actuator work, is located at Normal-open electromagnetic valve A2 energization on its pipeline is in close state, at this time output connection port I 30a, output connection port II The output of 30b brakeless liquid；

Step S8: having an oil return hole of a circle on the left of master cylinder piston I 17, the position of oil return hole is located at two when original state Between Cup-shaped seal circle 21 (i.e. chamber III), when master cylinder piston I 17 is moved to the left by promotion, but oil return hole is less than left side cup-shaped Before sealing ring 21, chamber III is compressed by small range at this time, and chamber III brake fluid pressure is greater than 28 pressure of lubricating cup, and chamber III is to lubricating cup 28 Brake fluid is pressed into until the oil return hole in 17 left side master cylinder piston I passes through left side Cup-shaped seal circle 21；

Step S9: release brake pedal, master cylinder piston II 20 slide to the right the release space chamber II, the hydraulic reduction of chamber II, chamber The V hydraulic chamber II that is greater than is hydraulic, and there is oil return hole in V brake fluid back cavity II of chamber, II 20 left side of master cylinder piston, when master cylinder piston II 20 It slides to the right, after oil return hole thereon is by the cup seal 21 on the left of I chamber, lubricating cup 28 discharges brake fluid to chamber II.With Chamber II is hydraulic and II 19 spring force of master cylinder reset spring reduces, and 17 left side active force of master cylinder piston I is greater than right side, master cylinder piston I 17 slide to the right, discharge IV space of chamber, while compressed master cylinder reset spring I 15 is gradually recovered original state, when master cylinder is living After filling in the cup seal 21 on the left of the oil return hole transit chamber III of 17 upper left side of I, lubricating cup 28 discharges brake fluid to chamber IV；Entirely Device restPoses.

Step 10: brake pedal is stepped on, the opening amount signal for driver's pedal that control system is detected according to sensor, Rotate motor 40；The gear I 38 being mounted on 40 output shaft of motor is driven to rotate.

Step 11: the rotation of gear I 38 drives the gear II 37 being engaged with to rotate, ball screw nut 57 and gear II 37 are interference fitted into and rotate together, and realize that ball screw axis 35 horizontally slips, and when braking, ball screw axis 35 slides to the left, and Do not rotate；Limited screw 41 is together by a threaded connection with relay piston III 55 and slides left and right.

Step 12: brake fluid respectively enters chamber i, chamber iv through oil inlet I 72 and oil inlet II 73 from lubricating cup 53, and through cup Shape sealing element I 45, cup seal II 47 reach chamber ii.

Step 13: ball screw axis 35 slides to the left, and relay piston III 55 is driven to slide together to the left with limited screw 41 Dynamic, limited screw 41 slides to the left, the space compression chamber iii, leads to the hydraulic increase of chamber iii, brake fluid through 43a mouthfuls of indentation chamber ii, At the same time, since relay piston III 55 moves downward compression chamber ii, lead to hydraulic increase, chamber ii brake fluid is from delivery outlet VI 66 outputs.

Step 14: relay piston I 43, relay piston II 49 are attached by piston fixed pin 44, relay piston I 43, relay piston II 49,44 three of piston fixed pin slide left and right together.The piston stopper pin 46 of relay piston II 49 The sliding scale for limiting relay piston II 49, prevents relay piston II 49 from excessively sliding to the right.As a result, especially when intelligent liquid When pressing force aid system failure, when being braked using fluid pressure type, when a thrashing, another system is prevented to fail, starting Protective effect.

Step 15: brake pedal release releases braking, and control system keeps motor 40 anti-according to the signal of Hall sensor To rotation, the gear I 38 being mounted on 40 output shaft of motor is driven to rotate；The rotation of gear I 38 drives the gear being engaged with II 37 is rotated, and 37 interference of ball screw nut 57 and gear II, which presses to, to be rotated together, and realizes that ball screw axis 35 is slided to the right It is dynamic.At this point, 55 left pressure of relay piston III is greater than right side, relay piston III 55 is also slided to the right together, reset spring II 42 gradually resets, and spring force gradually reduces, at this point, piston component left pressure is greater than right atrial pressure, piston component is to the right Sliding, chamber v, chamber ii, the hydraulic reduction of chamber iii, brake fluid are back to chamber v, chamber from delivery outlet V 65, VI 66 mouthfuls of delivery outlet respectively Ii, chamber iii, lubricating cup 53 discharge supplement brake fluid to chamber iv, chamber i in the direction of the arrow, chamber iv, chamber i by cup seal I 45, Brake fluid is supplemented to chamber v, chamber ii, chamber iii by cup seal II 47, is finally reached original state.

Successively execute step 1- step 15；

Using piston component as object, when not starting braking, piston component is in the rightmost side, and reset spring I 50 is acted on The power of piston component is more than or equal to the power that reset spring II 42 acts on piston component.When braking, relay piston III 55 is to the left Compression chamber ii and reset spring II 42, when pressure is greater than left side pressure on the right side of piston component, piston component is to the left Sliding, compression chamber v lead to hydraulic increase, and chamber v brake fluid is exported from delivery outlet V 65.

When electric brake actuator failure, brake actuator of the present apparatus as the fluid pressure type of insurance.At this point, open type Solenoid valve A1, normal-open electromagnetic valve A2, normal-closed electromagnetic valve A3 are all off-position, and normal-open electromagnetic valve A1 is connected, delivery outlet I 31a, delivery outlet II 31b export brake fluid to The vehicle stabilization servicing unit 36.Normal-open electromagnetic valve A2 is connected, output connector Mouth I 30a, output connection port II 30b export brake fluid to The vehicle stabilization servicing unit 36.Normal-closed electromagnetic valve A3 is closed, The input of 32 brakeless liquid of stroke simulator, does not work.

Claims (9)

1. the intelligent brake force aid system of a kind of motor driven and ECU control comprising controller (69), electric brake actuator (70) and The vehicle stabilization servicing unit (64), the controller (69) connect electric brake actuator (70), which holds Row device (70) is also connected with The vehicle stabilization servicing unit (64), and the controller includes ECU component (18), lubricating cup (28), stroke mould Quasi- device (32), hydraulic main cylinder (33), ECU component (18), the ECU component (18) connect hydraulic main cylinder (33), the hydraulic main cylinder (33) it is also connected with stroke simulator (32), hydraulic main cylinder (33) includes lubricating cup (28), hydraulic main cylinder (33) and stroke simulator (32) in cylinder body (3), further include above the cylinder body (3) output connection port I (30a), output connection port II (30b), Delivery outlet I (31a) and delivery outlet II (31b), wherein output connection port I (30a) and output connection port II (30b) series connection Logical, delivery outlet I (31a) is connected with delivery outlet II (31b) series connection, it is characterised in that: ECU component (18) includes that electronic control is single Member, the electronic control unit connect normal-open electromagnetic valve A1, normal-open electromagnetic valve A2 and normal-closed electromagnetic valve A3, the electronics Control unit is also connected with pressure sensor Pm and pressure sensor Pp.

2. the intelligent brake force aid system of motor driven as described in claim 1 and ECU control, it is characterised in that: stroke mould Quasi- device (32) include simulator positioning piston (6), also set up piston (12), the piston on the left of simulator positioning piston (6) (12) right end setting positioning sleeve II (11), the positioning sleeve II (11) connecting positioning sleeve I (9), positioning sleeve I (9) and positioning piston (6) elastic device is set between, chamber VI is constituted between positioning sleeve I (9) and positioning piston (6), includes on the outside of positioning piston (6) Sealing device, the right end of the positioning piston (6) further include simulator retaining ring (4).

3. the intelligent brake force aid system of motor driven as claimed in claim 2 and ECU control, it is characterised in that: piston (12) sealing device is housed between cylinder body (3), hydraulic main cylinder (33) includes (17) master cylinder piston I, and master cylinder piston I (17) is logical Elastic device connection master cylinder piston II (20) is crossed, it further includes that magnet ring fixes (24) that master cylinder piston II (20) is internal, and the magnet ring is solid Magnet ring I (23), magnet ring II (25) and sealing device are also set up between fixed (24) and the master cylinder piston II (20), the master cylinder is living The end of plug II (20) is also set up master cylinder retaining ring (27), and master cylinder piston II (20) end also sets up bracket connecting shaft (2), should Bracket connecting shaft (2) end connects mounting bracket (1).

4. the intelligent brake force aid system of motor driven as claimed in claim 3 and ECU control, it is characterised in that: magnet ring is solid Fixed (24) are also connected with displacement sensor, which is additionally coupled to electronic control unit, so as to by the changes of magnetic field of magnet ring Signal is transmitted to each component.

5. the intelligent brake force aid system of motor driven as claimed in claim 3 and ECU control, it is characterised in that: master cylinder is living It fills in and master cylinder reset spring I (15) is housed between I (17) and the cylinder body (3), master cylinder is housed on the left of master cylinder reset spring I (15) Spring positioning pedestal (13), between the master cylinder piston I (17) and master cylinder spring positioning pedestal (13) even by bolt II (14) It connects.

6. the intelligent brake force aid system of motor driven as claimed in claim 3 and ECU control, it is characterised in that: master cylinder is living The middle part that II (20) are flush-mounted in cylinder body (3) is filled in, and is located at the top position of stroke simulator (32), master cylinder piston II (20) and cylinder Sealing element is housed between body (3), is installed on four sealing devices on master cylinder piston I (17) and master cylinder piston II (20) for master cylinder Cylinder body (3) physical separation coelosis I, chamber II, chamber III, chamber IV.

7. the intelligent brake force aid system of motor driven as claimed in claim 6 and ECU control, it is characterised in that: the chamber II is connected with delivery outlet I (31a), delivery outlet II (31b), and normal-open electromagnetic valve A1, pressure are sequentially installed on their pipeline Force snesor Pp.

8. motor driven as claimed in claim 6 and ECU control intelligent brake force aid system, it is characterised in that: chamber II with Chamber V is connected, and normal-closed electromagnetic valve A3 is equipped on their pipeline.

9. the intelligent brake force aid system of motor driven and ECU control as described in any one of claim 6-8, feature exist In: chamber IV is connected with output connection port I (30a), output connection port II (30b), is sequentially installed on their pipeline Pressure sensor Pm, normal-open electromagnetic valve A2.