CN108275139A - Part and full decoupled combined type electric booster braking system - Google Patents
Part and full decoupled combined type electric booster braking system Download PDFInfo
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- CN108275139A CN108275139A CN201810109567.0A CN201810109567A CN108275139A CN 108275139 A CN108275139 A CN 108275139A CN 201810109567 A CN201810109567 A CN 201810109567A CN 108275139 A CN108275139 A CN 108275139A
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- push rod
- cylinder
- decoupling
- piston
- master cylinder
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Classifications
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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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/24—Electrodynamic brake systems for vehicles in general with additional mechanical or electromagnetic braking
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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
- B60T2270/00—Further aspects of brake control systems not otherwise provided for
- B60T2270/60—Regenerative braking
- B60T2270/604—Merging friction therewith; Adjusting their repartition
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses a kind of parts and full decoupled combined type electric booster braking system, it overcomes braking system of the existing technology to be difficult to decouple, decouple and expensive keep bad problem with pedal sense comprising braking intention generates unit, electric boosted assembly, assist motor assembly, brake pedal and brake force decoupling component, brake master cylinder assy, HCU and electronic control unit；The brake pedal push rod of braking intention generation unit is packed into power-assisted push rod to be connect with electric boosted assembly, the screw rod of electric boosted assembly engages connection and the connection of assist motor assembly with deceleration mechanism, brake pedal decouples the decoupling cylinder of component with brake force and coupling push rod is connect and the connection of electric boosted assembly, the master cylinder push rod of brake master cylinder assy is connect with decoupling cylinder and brake pedal is connect with brake force decoupling component, master cylinder is connect with HCU, and electronic control unit and braking intention generate unit, assist motor assembly, brake pedal and brake force decoupling component and the connection of HCU lines.
Description
Technical field
The present invention relates to a kind of brake system of car, specifically, the present invention relates to a kind of with partly decoupled and complete
Decouple the combined type electric booster braking system of function.
Background technology
With the development of automotive field technology, traditional brake fluid system has been unable to meet people to high security, height
The requirement of the automotive performance of comfort.Especially in recent years with motorcar electric and intelligentized development trend, to automobile
Braking system proposes requirements at the higher level.For motorized automobile, in order to increase course continuation mileage, it is desirable that braking system must have again
Raw stopping power；For intelligent vehicle, it is desirable that automobile must have the function of active brake.Obviously, traditional hydraulic braking
System cannot be satisfied above-mentioned requirements.Under this overall background, brake-by-wire technology and electric booster braking system come into being.
It is compared with Conventional braking systems, the essence of brake-by-wire is that the physics eliminated between brake pedal and actuator connects
It connects, then is replaced with sensor and motor.Actually step on to be sensor when driver's pedal, sensor is by driver intention
It is converted into electric signal and is sent to ECU to which driving motor generates brake force.This essential characteristic of line control brake system so that it
Receive the attention of automobile engineer.By taking electric vehicle as an example, for electric vehicle, Brake energy recovery is a key
Technology, and Brake energy recovery further relates to the decoupling of braking system.For Conventional braking systems, due to brake pedal and
Physical connection between actuator so that decoupling is difficult to realize.In other words, when realizing Brake energy recovery, for traditional
Braking system, driver's brake pedal, at this time brake braking force depend not only on pedal force, and with the braking of motor
Torque is related, and the braking moment of motor is related to rotating speed (speed).In this case, under identical pedal force, generation
Brake braking force but and differs, this is extremely disagreeableness for driver.In view of the above situation, brake-by-wire is answered
It transports and gives birth to.Due to " flexibility " connection between pedal and actuator so that the decoupling problem of braking system is addressed.Line traffic control
Dynamic technology includes mainly two kinds of forms at present：Electronic hydraulic brake system (EHB) and electromechanical braking system (EMB).
Although brake-by-wire technology solves the problems, such as decoupling, but itself existing defect but constrains itself
Development.EMB is a kind of form of brake-by-wire technology, it has the advantages that high integration, high electromechanicsization degree, but now simultaneously
It does not produce in batches really, is only shown on certain concept cars.This is because：EMB needs four sets of independent execution
Motor, cost are very high；Four sets of actuating motors of EMB work long hours under stall operating mode, especially high to the performance requirement of motor.
Especially preceding spindle motor, axle load moves forward when due to braking, needs larger torque, therefore higher to the voltage request of vehicle power supply,
Usually 42V；According to regulation, EMB needs additional failure backup mechanism, it means that in script without any hydraulic pressure system
It in the line control brake system of system, needs to rearrange hydraulic system, considerably increases the complexity of system.
As another form of line control brake system, EHB has been realized in batch production, but itself is existing scarce
It is also apparent to fall into：The brake pressure of EHB is provided by high pressure accumulator, and when the foundation of energy storage pressure needs certain
Between, for a long time, under the damped condition of high intensity, it is susceptible to the insufficient situation of brake pressure；Although fail backup mechanism than
EMB is slightly simple, but generally still very complicated, increases the cost of system.
It is compared with line control brake system, electric booster braking system occupies position of mainstream on the market.Currently on the market
The electric booster braking system of appearance is broadly divided into two classes, and one kind is itself to can not achieve decoupling function, needs to coordinate other machines
Structure can be decoupled, expensive, such as the Ibooster of Bosch；Another kind of is energy itself realization decoupling, but complicated, and
Partly decoupled can only be realized when decoupling, cannot be carried out full decoupled or partly decoupled and be taken into account with full decoupled the two, such as Hitachi
E-ACT systems.
Invention content
It is difficult to decouple the technical problem to be solved by the present invention is to overcoming braking system of the existing technology, be decoupled into
This costliness, pedal sense keep bad problem, provide a kind of part and full decoupled combined type electric booster braking system.
In order to solve the above technical problems, the present invention adopts the following technical scheme that realization：The part and complete solution
The combined type electric booster braking system of coupling includes that braking intention generates unit, electric boosted assembly, assist motor assembly, braking
Pedal and brake force decoupling component, brake master cylinder assy, HCU (23) and electronic control unit (30)；
It includes brake pedal push rod that the braking intention, which generates unit,；
The electric boosted assembly includes power-assisted push rod, screw rod, coupling push rod；
The assist motor assembly includes PMSM motors and deceleration mechanism；
The brake pedal includes decoupling cylinder with brake force decoupling component；
The brake master cylinder assy includes master cylinder and master cylinder push rod；
The braking intention generates unit and is packed into power-assisted push rod and electric boosted assembly phase by brake pedal push rod
Connection, electric boosted assembly engages connection by screw rod with the deceleration mechanism of lower section and assist motor assembly is connected, PMSM electricity
Machine output end is connect with deceleration mechanism input terminal using shaft coupling, and brake pedal passes through with brake force decoupling component decouples cylinder and coupling
It closes push rod connection with electric boosted assembly to be connected, brake master cylinder assy is connect with decoupling cylinder by master cylinder push rod and brake pedal
It is connected with brake force decoupling component, the master cylinder in brake master cylinder assy is connect using pipeline with HCU, electronic control unit and system
Dynamic generation unit, assist motor assembly, brake pedal and the brake force decoupling component of being intended to is connect with HCU using signal wire.
It includes brake pedal, pedal travel sensor and idle stroke tune that braking intention described in technical solution, which generates unit,
Save screw rod；The pedal travel sensor is mounted on the holder using axis pin installation brake pedal, brake pedal push rod
Right end is connected by hinge with brake pedal upper end, and the left end of brake pedal push rod processes internal thread hole, null in an axial direction
The right end of journey adjusting screw rod processes external threads, and the left end of brake pedal push rod passes through screw thread with the right end of idle stroke adjusting screw rod
Connection, the idle stroke adjusting screw rod after connection are fitted into brake pedal push rod in the push rod blind hole of power-assisted push rod right end, idle stroke
It is reserved with gap between the left side of adjusting screw rod and the hole bottom surface of the push rod blind hole of power-assisted push rod.
Electric boosted assembly described in technical solution further includes push rod return spring, leading screw, power-assisted assembly shell, buffering
Disk, leading screw return spring and couple push rod return spring；The power-assisted push rod is mounted in the centre bore of leading screw, push rod return
Spring is mounted in the push rod blind hole of power-assisted push rod right end, and the left end of push rod return spring is fixed on the push rod blind hole of power-assisted push rod
Hole bottom surface on, the left end that the right end of push rod return spring generates the brake pedal push rod in unit with braking intention contacts company
It connects, is stayed between the idle stroke adjusting screw rod right side in the hole bottom surface of the push rod blind hole of power-assisted push rod and braking intention generation unit
There is the gap of 5-7mm, screw sleeve is equipped with ball on leading screw in raceway between screw rod and leading screw, coupling push rod is placed on
The left side of power-assisted push rod, power-assisted push rod, leading screw, screw rod are mounted on the right end for coupling push rod in power-assisted assembly shell, and coupling pushes away
The left end of bar is located at the outside of shell wall on the left of power-assisted assembly shell, couples periphery and the leading screw of the right side of push rod right end push-plate
Left side connect, buffer disc using welding manner be fixed on coupling push rod right end push-plate on groove in, buffer disc
Right side and the left side of power-assisted push rod connect；Coupling push rod return spring is inside and outside set with and coaxial with leading screw return spring
Arrangement, coupling push rod return spring and the left end of leading screw return spring are each attached on the left inside wall surface of power-assisted assembly shell, coupling
The right end for closing push rod return spring acts on the left side of coupling push rod right end push-plate, the right side of leading screw return spring and silk
The left side of thick stick connects；The rigidity of leading screw return spring is more than the rigidity of coupling push rod return spring.
Coupling push rod described in technical solution is made of left end decoupling the cylinder piston, intermediate push rod and right end push-plate, left end
It is disc-like structural member that the cylinder piston, which is decoupled, with right end push-plate, and intermediate push rod is the straight-bar class formation part for waiting circle cross-sections, left end solution
Coupling the cylinder piston, intermediate push rod are connected successively with right end push-plate, and left end decouples returning for the cylinder piston, intermediate push rod and right end push-plate
Shaft axis is conllinear, and the diameter that left end decouples the cylinder piston is equal with the decoupling internal diameter of cylinder, and left end decouples the cylinder piston and is packed into decoupling cylinder
At being slidably connected, a cylindrical groove, cylindrical groove and right end push-plate are processed on the right side of right end push-plate
Rotation conllinear, cylindrical depth of groove are equal with the thickness of the buffer disc in electric boosted assembly.
Power-assisted push rod described in technical solution is cylindrical structure part, and the right end of power-assisted push rod is machined with push rod along axis
Blind hole, the rotation conllinear of the axis of rotation and power-assisted push rod of push rod blind hole, diameter and the leading screw centre bore of power-assisted push rod
Diameter is equal, the equal length of the length and leading screw centre bore of power-assisted push rod；
The screw rod is two-part multi-diameter shaft class formation part, and screw through hole, screw rod are machined at the axis of rotation of screw rod
The interior spiral shell that the spiral rolling track rolled as ball is combined together with the external spiral groove on leading screw is provided in the inner hole surface of through-hole
Spin slot；The diameter that left section of screw rod is more than right section of diameter, and the periphery that left section of screw rod is provided with the wheel that connection is engaged with deceleration mechanism
Tooth.
Brake pedal and brake force decoupling component described in technical solution further include full decoupled fluid storage compartment, bi-bit bi-pass
Solenoid valve, master cylinder push rod return spring, check valve, proportional pressure control valve, partly decoupled accumulator and hydraulic pressure force snesor；Institute
The right end for the decoupling cylinder stated is sleeved in the left end decoupling the cylinder piston of coupling push rod, and the left end for decoupling cylinder is sleeved on master cylinder push rod
Right end decouples in the cylinder piston, and master cylinder push rod return spring is sleeved on the push rod of master cylinder push rod, a left side for master cylinder push rod return spring
End is fixed on the inner face of decoupling cylinder left cylinder wall, and right end and the master cylinder push rod right end of master cylinder push rod return spring decouple the cylinder piston
Left side connect, full decoupled fluid storage compartment by fluid pressure line with decouple cylinder upper end be connected, in full decoupled storage
It is provided with two-position two-way solenoid valve between liquid chamber and the fluid pressure line for decoupling cylinder；Partly decoupled accumulator passes through fluid pressure line and decoupling
The lower end of cylinder connects, and parallel way is provided with Prop-pressure control between partly decoupled accumulator and the fluid pressure line of decoupling cylinder
Valve and check valve, the inlet of check valve are connect with the liquid in-out mouth of partly decoupled accumulator, and proportional pressure control valve goes out liquid
Mouth is connect with the liquid in-out mouth of accumulator when partly decoupled, in the liquid in-out mouth and proportional pressure control valve of partly decoupled accumulator
Liquid outlet between fluid pressure line on be provided with hydraulic pressure force snesor.
Brake master cylinder assy described in technical solution includes fluid reservoir, second piston return spring, second piston and the
One piston return spring；The second piston is mounted in master cylinder, and master cylinder is divided into left chamber and right chamber, first piston return bullet
Spring is in right chamber, and the left side of the first piston in the right end and master cylinder push rod of first piston return spring connects, the
The left end of one piston return spring and the right side of second piston connect, and second piston return spring is mounted in left chamber,
The right end of second piston return spring and the left side of second piston connect, and the left end of second piston return spring acts on
On the inner face of master cylinder left cylinder wall, the left and right chamber of master cylinder is connect using fluid pressure line with fluid reservoir, under the left and right chamber of master cylinder
End is connect using fluid pressure line with hydraulic control unit.
Master cylinder push rod described in technical solution is made of first piston, push rod and right end the decoupling the cylinder piston of left end, the
One piston and right end decoupling the cylinder piston are disc-like structural member, and push rod be the straight-bar class formation part of grade circle cross-sections, first piston,
Push rod is connected successively with right end decoupling the cylinder piston, and first piston, push rod and right end decouple the rotation conllinear of the cylinder piston,
The diameter of first piston is equal with the internal diameter of master cylinder, and it is equal with the decoupling internal diameter of cylinder that right end decouples the cylinder piston diameter；Master cylinder push rod
Right end decoupling the cylinder piston be packed into decoupling cylinder at being slidably connected, the first piston of master cylinder push rod is fitted into the right chamber of master cylinder into cunning
Dynamic connection.
Electronic control unit and braking intention described in technical solution generate unit, assist motor assembly, brake pedal
Component is decoupled with brake force and HCU is connect using signal wire and refers to：Electronic control unit by harness and pedal travel sensor,
Two-position two-way solenoid valve, HCU, proportional pressure control valve, hydraulic pressure force snesor are connect with the signal end of PMSM motors.
Compared with prior art the beneficial effects of the invention are as follows：
1. part of the present invention with full decoupled combined type electric booster braking system for electric vehicle,
When demand braking force is smaller, full decoupled, the electric booster braking system institute of brake pedal and friction brake force may be implemented
It needs the brake force brake force caused by energy recycle device completely to provide, to recover energy to the greatest extent, improves electronic
Automobile course continuation mileage；
2. part of the present invention with full decoupled combined type electric booster braking system for electric vehicle,
When the brake force that brake power recovering device can be provided cannot meet total demand braking force, brake pedal may be implemented and rub
The partly decoupled of brake force is wiped, a brake force part is provided by friction brake force needed for electric booster braking system, another part
It is provided by regenerative braking force, to realize the cooperation of friction catch and regenerative braking, while meeting braking requirement, is returned
Braking energy is received, the course continuation mileage of automobile is improved；
3. part of the present invention is either operated in part with full decoupled combined type electric booster braking system
Decoupling or full decoupled state, the system that total brake application curve and when not decoupling generates caused by electric booster braking system
Dynamic curve fits like a glove, and the dynamic characteristic of electric booster braking system is good；
4. part of the present invention is with full decoupled combined type electric booster braking system due to decoupling component and system
It is not connected directly between dynamic pedal, even if there is a little fluctuation of pressure in decoupling component, by the control to assist motor,
It can ensure that pedal sense when braking system is operated in decoupled state is identical with the pedal sense of non-decoupling state, to a bit not shadow
Ring the road feel of driver；
5. part of the present invention is worked as with full decoupled combined type electric booster braking system is operated in failure state
When, pedal push rod need to only overcome the resistance of coupling push rod return spring that can push master cylinder push rod, and without overcoming leading screw return
The resistance of spring drives all elements including lead screw pair, deceleration mechanism and PMSM motors to move together, to reduce
Pedal resistance alleviates the braking burden that driver brakes in brake system non-functional to a certain extent；
6. part of the present invention can be to slack of pedal with full decoupled combined type electric booster braking system
It is adjusted, increases the requirement of jump point or the adjustment of same vehicle models difference comfort level to braking to meet different vehicle,
Adaptability is good；
7. part of the present invention and full decoupled combined type electric booster braking system, pass through the buffer disc of setting
The feedback wave force that brake pedal is passed to by power-assisted push rod can be filtered out to a certain extent, to relaxing when improving braking
Suitable sense.
Description of the drawings
The present invention will be further described below with reference to the drawings：
Fig. 1 is the signal of part of the present invention and full decoupled combined type electric booster braking system structure composition
Figure；
In figure：1. brake pedal, 2. pedal travel sensor, 3. brake pedal push rods, 4. idle stroke adjusting screw rods, 5. push away
Bar return spring, 6. power-assisted push rods, 7. screw rods, 8. leading screws, 9. power-assisted assembly shells, 10. buffer discs, 11. coupling push rods, 12.
Leading screw return spring, 13. coupling push rod return springs, 14. full decoupled fluid storage compartments, 15. two-position two-way solenoid valves, 16. decouplings
Cylinder, 17. master cylinder push rod return springs, 18. fluid reservoirs, 19. master cylinders, 20. second piston return springs；21. second piston；22.
First piston return spring；23.HCU；24. master cylinder push rod, 25. check valves, 26. proportional pressure control valves, 27. partly decoupleds store
Energy device, 28. hydraulic pressure force snesors, 29.PMSM motors, 30. electronic control units, 31. deceleration mechanisms.
Specific implementation mode
The present invention is explained in detail below in conjunction with the accompanying drawings：
The combined type electric booster braking system partially and fully decoupled includes that braking intention generates unit, electronic
Power-assisted assembly, assist motor assembly, brake pedal and brake force decoupling component, brake master cylinder assy, HCU23 and electronic control are single
Member 30.
It includes brake pedal 1, pedal travel sensor 2, brake pedal push rod 3 and sky that the braking intention, which generates unit,
Stroke adjustment screw rod 4.
The pedal travel sensor 2 belongs to standard component using Hall-type angular transducer.The braking is stepped on
Plate push rod 3 is cylindrical structure part, and left end is axially disposed to have blind screw hole, right end to be disposed radially the pin of installation axis pin
Shaft through-hole.Idle stroke adjusting screw rod 4 is cylindrical structure part；Pedal travel sensor 2 is mounted on is stepped on using axis pin installation braking
On the holder of plate 1, the right end of brake pedal push rod 3 is connected by axis pin with 1 upper end of brake pedal, idle stroke adjusting screw rod 4
Right end process external threads, be connected through a screw thread between brake pedal push rod 3 and idle stroke adjusting screw rod 4, the sky after connection
Stroke adjustment screw rod 4 and brake pedal push rod 3 be fitted into together 6 right end of power-assisted push rod along the blind hole that axis is arranged.
The electric boosted assembly include push rod return spring 5, power-assisted push rod 6, screw rod 7, leading screw 8, outside power-assisted assembly
Shell 9, buffer disc 10 couple push rod 11, leading screw return spring 12 and couple push rod return spring 13.
Push rod return spring 5, leading screw return spring 12 and the coupling push rod return spring 13 is helical spring,
Belong to standard component.Power-assisted assembly shell 9 is the cuboid housing of lower ending opening, is non-standard component.Buffer disc 10 is cylinder rubber
Glue part is standard component.
The power-assisted assembly shell 9 is the installing matrix of electric boosted assembly, and power-assisted push rod 6, screw rod 7, leading screw 8 are normal
Its right side acts on the right internal face of power-assisted assembly shell 9 under the state of position, and carries out right pole by power-assisted assembly shell 9
The limit of extreme position.
Central through hole is machined on the axis of rotation of the leading screw 8, power-assisted push rod 6 is mounted in the central through hole, helps
The rotation conllinear of bar 6 and through-hole is pushed, and can be moved to axial；The excircle of leading screw 8 is provided with the outer of installation ball
Helicla flute, the excircle of leading screw 8 are engaged connection with the inner periphery of screw rod 7 by ball and form lead screw pair.
The screw rod 7 is two-part multi-diameter shaft class formation part, and screw through hole, spiral shell are machined at the axis of rotation of screw rod 7
The inner spiral groove of installation ball is provided in the inner hole surface of rod through-hole, the external spiral groove on leading screw 8 and the inner spiral groove on screw rod 7
It is combined together the spiral rolling track rolled as ball；The diameter that 7 left sections of screw rod is more than right section of diameter, the week that 7 left sections of screw rod
While being provided with the gear teeth for engaging connection with deceleration mechanism 31.
The power-assisted push rod 6 is cylindrical structure part, and the right end of power-assisted push rod 6 is machined with push rod blind hole, push rod blind hole
Axis of rotation and power-assisted push rod 6 rotation conllinear, the diameter of power-assisted push rod 6 is equal with the diameter of 8 centre bore of leading screw, helps
Push the equal length of the length and 8 centre bore of leading screw of bar 6；It is blind that idle stroke adjusting screw rod 4 and brake pedal push rod 3 are packed into push rod
Kong Zhong；It is reserved between 5-7mm between 4 right side of hole bottom face and idle stroke adjusting screw rod of the push rod blind hole of power-assisted push rod 6
Gap, by the length for changing idle stroke adjusting screw rod 4 and 3 screw-thread fit of brake pedal push rod, thus it is possible to vary the preset clearance
Size meets different vehicle and increases the requirement of jump point or same vehicle models to braking to form different slack of pedal
The adjustment of different comfort levels.The left end of push rod return spring 5 is fixed on the hole bottom face of the push rod blind hole of power-assisted push rod 6, right
End is resisted against on the left side of brake pedal push rod 3, when slack of pedal changes, the pretightning force of push rod return spring 5
Also it changes therewith.
The coupling push rod 11 be I-shaped structure part, coupling push rod 11 by left end decoupling the cylinder piston, intermediate push rod with
Right end push-plate forms, and it is disc-like structural member that left end, which decouples the cylinder piston with right end push-plate, and intermediate push rod is the straight of equal circle cross-sections
Bar class formation part, left end decoupling the cylinder piston, intermediate push rod are connected successively with right end push-plate, and left end decouples the cylinder piston, centre
The rotation conllinear of push rod and right end push-plate, the diameter that left end decouples the cylinder piston is equal with the decoupling diameter of cylinder 16, left end solution
Coupling the cylinder piston is packed into decoupling cylinder 16 at being slidably connected, and a cylindrical groove is processed on the right side of right end push-plate, circle
The rotation conllinear of cylindrical groove and right end push-plate, cylindrical depth of groove and the buffer disc 10 in electric boosted assembly
Thickness it is equal；Buffer disc 10 fixes the periphery for the right side for coupling 11 right end push-plate of push rod in a groove using welding manner
It is connected with the left side of leading screw 8, the right side of fixed buffer disc 10 in a groove is contacted with the left side of power-assisted push rod 6
Connection；Coupling push rod return spring 13 and leading screw return spring 12 are inside and outside set with and coaxially arranged, coupling push rod return spring 13
It is each attached to the left end of leading screw return spring 12 on the left inside wall surface of power-assisted assembly shell 9, coupling push rod return spring 13
Right end acts on the left side of coupling 11 right end push-plate of push rod, and the right end of leading screw return spring 12 acts on the left end of leading screw 8
On face；The rigidity of leading screw return spring 12 many bigger than the rigidity for coupling push rod return spring 13.
The assist motor assembly includes PMSM motors 29 and deceleration mechanism 31.
The PMSM motors 29 are permanent magnet synchronous DC motor.Deceleration mechanism 31 fills for gear-driven deceleration torque
It sets.The output shaft of PMSM motors 29 is connected with the input shaft of deceleration mechanism 31, gear of output end and the screw rod 7 of deceleration mechanism 31
The gear teeth meshing of left end.
The brake pedal and brake force decoupling component include full decoupled fluid storage compartment 14, two-position two-way solenoid valve 15,
Decouple cylinder 16, master cylinder push rod return spring 17, check valve 25, proportional pressure control valve 26, partly decoupled accumulator 27 and pressure
Sensor 28.
The full decoupled fluid storage compartment 14, decoupling cylinder 16 are cylindrical housings part, are non-standard component.Bi-bit bi-pass electromagnetism
Valve 15, check valve 25 and proportional pressure control valve 26 belong to valve element, are standard component.Master cylinder push rod return spring 17 is circle
Cylindrical spring is standard component.Partly decoupled accumulator 27 be capsule every formula air charged accumulator, be standard component.Hydraulic pressure force snesor 28
It is standard component.
The right end of the decoupling cylinder 16 is sleeved on the left end of coupling push rod 11, and the left end of decoupling cylinder 16 is sleeved on master cylinder
On the right end of push rod 24.Master cylinder push rod return spring 17 is sleeved on the push rod of master cylinder push rod 24, master cylinder push rod return spring 17
Left end be fixed on the inner face of decoupling 16 left cylinder wall of cylinder, the right end of master cylinder push rod return spring 17 and 24 right end of master cylinder push rod
Left side connect.Full decoupled fluid storage compartment 14 is arranged in the upper end of decoupling cylinder 16, passes through fluid pressure line and decoupling cylinder 16
Upper surface on aperture connection.Bi-bit bi-pass electricity is provided between full decoupled fluid storage compartment 14 and the fluid pressure line of decoupling cylinder 16
Magnet valve 15；Partly decoupled accumulator 27 is arranged in the lower end of decoupling cylinder 16, and partly decoupled accumulator 27 passes through fluid pressure line and solution
Aperture connection on the lower face of coupling cylinder 16, with parallel way between partly decoupled accumulator 27 and the fluid pressure line of decoupling cylinder 16
It is provided with proportional pressure control valve 26 and check valve 25, the inlet of check valve 25 and the liquid in-out mouth of partly decoupled accumulator 27
The liquid outlet of connection, check valve 25 is connect with decoupling cylinder 16 using fluid pressure line, the liquid outlet of proportional pressure control valve 26 and portion
The liquid in-out mouth for decomposing coupling accumulator 27 is connected using fluid pressure line, and inlet and the decoupling cylinder 16 of proportional pressure control valve 26 are adopted
Connected with fluid pressure line, proportional pressure control valve 26 and check valve 25 be respectively intended to be responsible for the feed liquor of partly decoupled accumulator 27 and
Drain.It is set on fluid pressure line between liquid outlet of the liquid in-out mouth to proportional pressure control valve 26 of partly decoupled accumulator 27
It is equipped with hydraulic pressure force snesor 28, the pressure of accumulator 27 monitors in real time when for partly decoupled, so that achievement unit is decomposed
Brake force is accurately controlled when coupling.
The brake master cylinder assy include fluid reservoir 18, master cylinder 19, second piston return spring 20, second piston 21,
First piston return spring 22 and master cylinder push rod 24.
Though the fluid reservoir 18, master cylinder 19 are not standard components, substantially normalized in industry, therefore can basis
It is selected.Second piston return spring 20, first piston return spring 22 are helical spring, are standard components.Second
Piston 21 is cylindrical structure part, coordinates with the inner wall of master cylinder 19, is standard component.
The second piston 21 is placed in master cylinder 19, and master cylinder is divided into left chamber and right chamber.Master cylinder push rod 24 is processed into work
Font is made of the first piston of left end, push rod and right end decoupling the cylinder piston, first piston is disc-like with decoupling the cylinder piston
Structural member, push rod are the straight-bar class formation part of equal circle cross-sections, and first piston, push rod are connected successively with decoupling the cylinder piston,
The rotation conllinear of first piston, push rod and decoupling the cylinder piston, the diameter of first piston is equal with the internal diameter of master cylinder 19, decoupling
The cylinder piston diameter is equal with the decoupling internal diameter of cylinder 16；The right end decoupling the cylinder piston of master cylinder push rod 24 is packed into decoupling cylinder 16 into sliding
Connection, left end, that is, first piston of master cylinder push rod 24 are fitted into the right chamber of master cylinder 19 at being slidably connected.First piston return spring
22 are in right chamber, and the right end of first piston return spring 22 acts on the left side of the first piston in master cylinder push rod 24,
The left end of first piston return spring 22 acts on the right side of second piston 21.Second piston return spring 20 is in left chamber
In, the right end of second piston return spring 20 acts on the left side of second piston 21, a left side for second piston return spring 20
End acts on the interior left side of master cylinder 19.The upper end of 19 left and right chamber of master cylinder has an oilhole, by fluid pressure line with
Fluid reservoir 18 is connected, and the lower end of the left and right chamber of master cylinder is also respectively set that there are one oilholes, is connected with HCU23 by fluid pressure line.
The HCU23 has 2 inlets and 4 liquid outlets.The left chamber inlet of HCU23 passes through pipeline and master cylinder 19
Left chamber liquid outlet connects, and the right chamber inlet of HCU23 is connect by pipeline with the right chamber liquid outlet of master cylinder 19, four of HCU23
Liquid outlet is connect by the wheel cylinder on four wheels of pipeline and vehicle respectively.
The electronic control unit 30 by harness and pedal travel sensor 2, two-position two-way solenoid valve 15, HCU23,
The signal end connection of proportional pressure control valve 26, hydraulic pressure force snesor 28, PMSM motors 29.
The idle stroke adjusting screw rod 4 that the braking intention generates unit is fitted into 6 right side of power-assisted push rod in electric boosted assembly
In the blind hole at end, the hole bottom surface of the blind hole of 6 right end of idle stroke adjusting screw rod 4 and power-assisted push rod is reserved with the gaps 5-7mm.It is electronic to help
Gear engagement in the left end gear of screw rod 7 in power assembly and the deceleration mechanism 31 of assist motor assembly；Electric boosted assembly
It is provided with brake pedal between the master cylinder 19 of brake master cylinder assy and decouples component, the coupling of electric boosted assembly with brake force
The left end of push rod 11 is fitted into the inside of brake pedal and the decoupling cylinder 16 in brake force decoupling component.The master cylinder of brake master cylinder assy
The right end of push rod 24 is packed into the left-half of brake pedal and the decoupling cylinder 16 of brake force decoupling component；The master of brake master cylinder assy
Cylinder 19 is connected by the fluid pressure line divided into the inlet of HCU23.
The operation principle of the combined type electric booster braking system of the present invention partially and fully decoupled：
The electric boosted states of one,
Electric boosted function be part of the present invention with full decoupled combined type electric booster braking system most
Basic function demand.When part of the present invention and full decoupled combined type electric booster braking system are operated in electronic help
When power state, part of the present invention and the two-position two-way solenoid valve in full decoupled combined type electric booster braking system
15 are operated in the full decoupled normally closed position of no power, and solenoid valve 15 is in cut-off state.Simultaneously with this, electric booster braking system
In system cut-off state is also to 26 no power of the proportional pressure control valve of partly decoupled.At this point, the liquid inside decoupling cylinder 16
Body is in closed state, according to the Incoercibility of liquid, decouples the liquid inside cylinder 16 and just transmits coupling as rigid body
Power between push rod 11 and master cylinder push rod 24.When rigid brake pedal 1, the needs of idle stroke adjusting screw rod 4 overcome to be pushed away with power-assisted
It can just be contacted with power-assisted push rod 6 after the preset clearance of bar 6.Since the pretightning force of push rod return spring 5 is less than coupling push rod return
The pretightning force of spring 13, before idle stroke adjusting screw rod 4 is contacted with the inner face of power-assisted push rod 6, power-assisted push rod 6 is motionless, electricity
Dynamic force aid system does not work.The stage belongs to 1 hollow travel stage of brake pedal.By changing idle stroke adjusting screw rod 4 and braking
The length of 3 screw-thread fit of pedal push rod, thus it is possible to vary preset clearance meets different vehicle to which row is at different slack of pedal
Increase the requirement of jump point or the adjustment of same vehicle models difference comfort level to braking.When idle stroke adjusting screw rod 4 is pushed away with power-assisted
After the inner face contact of bar 6, continues to trample brake pedal 1, just enter the electric boosted stage.In this stage, pedal travel
The pedal angular signal of acquisition is transferred to electronic control unit 30 by sensor 2, and electronic control unit 30 is to signal
The braking intention of driver is perceived after reason makes it generate certain torque, PMSM motors to send instructions to PMSM motors 29
29, by the way that the torque is converted into force effect on coupling push rod 11 after deceleration mechanism 31, lead screw pair, push coupling 11 band of push rod
The forward movement of master cylinder push rod 24, the brake force to match with driver intention to make braking system generate promotes vehicle to subtract
Speed or parking.In the electric boosted stage, the power that the power and PMSM motors 29 that driver's pedal generates generate can be formed
Resultant force decomposed：The power that driver acts on brake pedal 1 is only used for overcoming the spring of coupling push rod return spring 13
Power, to form pedal sense；The power part that PMSM motors 29 generate is used for overcoming the spring force of leading screw return spring 12, another
Part is used for pushing coupling push rod 11 to be moved to the left, and forms brake force.After decomposing in this way, the control of PMSM motors 29 can be made
Logic processed becomes simple, and the power of power and the generation of PMSM motors 29 that the generation of brake pedal 1 will not be trampled because of driver is coupling in
The control algolithm of PMSM motors 29 is had an impact together；Simultaneously with this, also for braking when generate driver needed for pedal
Sense provides benchmark, should all take this as a foundation (except failure Status of Backups) in other working conditions, to ensure each
The brake pedal sense of driver is identical when kind damped condition work.
The full decoupled states of two,
For electric vehicle, when demand braking force is smaller, part of the present invention and full decoupled Combined type electric
Brake force needed for dynamic energy assisted braking system is all generated by brake power recovering device, at this time partly with it is full decoupled compound
Formula electric booster braking system is just operated in full decoupled state.In this case, to full decoupled bi-bit bi-pass electromagnetism
Valve 15, which is powered, to be opened, and two-position two-way solenoid valve 15 is in the conduction state；It is obstructed to the proportional pressure control valve 26 of partly decoupled
Electricity is in cut-off state.When driver's brake pedal 1, PMSM motors 29 do not work, and electric booster system, which is in, to close
Closed state.Under the action of driver tramples brake pedal force, power-assisted push rod 6 pushes coupling push rod 11 to overcome by buffer disc 10
The spring force for coupling push rod return spring 13 moves forward.Since two-position two-way solenoid valve 15 is in the conduction state, pushed away in coupling
Under the action of bar 11, decouples the liquid in cylinder 16 and will pass through two-position two-way solenoid valve 15 into full decoupled fluid storage compartment 14.At this time
Hydraulic coupling foundation is had no in decoupling cylinder 16, therefore master cylinder push rod 24 remains stationary as under the action of master cylinder push rod return spring 17,
The back cavity and ante-chamber of master cylinder 19 do not establish brake pressure, partly with needed for full decoupled combined type electric booster braking system
Brake force generated completely by brake power recovering device.Loosen the brake 1, brake release, in full decoupled fluid storage compartment 14
Liquid return under the effect of gravity decoupling cylinder 16 in, subsequent two-position two-way solenoid valve 15 power-off cut-off.
Three, partly decoupled states
For electric vehicle, when the brake force that brake power recovering device can be provided cannot meet total demand braking force
When, part of the present invention is made with a brake force part needed for full decoupled combined type electric booster braking system by friction
Power provides, and another part is provided by regenerative braking force, and part of the present invention and full decoupled combined type are electronic at this time
Energy assisted braking system is just operated in partly decoupled state.In this case, normal to full decoupled two-position two-way solenoid valve 15
It closes；To partly decoupled proportional pressure control valve 26 be powered, and its electrical current according to electric booster braking system require into
Row adjustment in real time, to make the Opening pressure of proportional pressure control valve 26 meet electric booster braking system requirement.About electromagnetism
The Opening pressure of formula pressure-control valve 26, it is specifically described below.Assuming that under a certain pedal travel, pedal travel sensor
The angular signal detected is transferred to electronic control unit 30 by 2, and electronic control unit 30 is obtained after calculating and should be produced at this time
The brake force that raw total amount is F.Due to part of the present invention and full decoupled combined type electric booster braking system at this time
It is operated in partly decoupled state, the brake force needed for electric booster braking system is total to by regenerative braking force F1 and friction brake force F2
With generation, i.e. F1+F2=F.F2 is converted on the right side of master cylinder push rod 24, obtains this by then friction brake force F2=F-F1
When should be generated on the right side of master cylinder push rod 24 pressure be P hydraulic coupling, that is, decouple cylinder 16 inside pressure should be P.
Electronic control unit 30 just controls PMSM motors 29 and generates power torque corresponding with pressure P at this time.Again because of ratio pressure
Control valve 26 is in the conduction state, and the Opening pressure P1 of proportional pressure control valve 26 should be equal to by decoupling the pressure P inside cylinder 16
The sum of with energy storage pressure P2 (back pressure), i.e. P=P1+P2.Then the Opening pressure P1=P-P2, P2 of proportional pressure control valve 26 are logical
Hydraulic pressure force snesor 28 is crossed to obtain.After the Opening pressure that proportional pressure control valve 26 is obtained by calculation, further according to ratio pressure
Current characteristics when force control valve 26 is opened can obtain the energization of proportional pressure control valve corresponding with Opening pressure P1 26
Electric current I.In next pedal position, the proportional pressure control valve 26 that another pedal position can be obtained again by same algorithm is powered
Electric current and motor power torque.And so on can obtain under a series of partly decoupled states ratio pressure when different pedal positions
The power torque of the electrical current and motor 29 of control valve 26, it is total to what is generated when system being made to work under partly decoupled state
Brake application curve fits like a glove with the brake application curve generated under electric boosted state is operated in, electric booster braking system braking
When dynamic characteristic it is good.When driver loosen the brake 1 when, brake release, proportional pressure control valve 26 power-off cut-off.By
The higher liquid of pressure is stored in partly decoupled accumulator 27, check valve 25 is opened under the action of hydraulic coupling, and part solves
Liquid in coupling accumulator 27 will pass through check valve 25 and return in decoupling cylinder 16.If system is place before partly decoupled state
In full decoupled state, then loosen the brake 1 when, two-position two-way solenoid valve 15 can temporarily be powered open, full decoupled storage
Liquid in liquid chamber 14 is returned under the effect of gravity in decoupling cylinder 16, the power-off cut-off of subsequent two-position two-way solenoid valve 15.If electric
Dynamic energy assisted braking system when starting braking from partly decoupled state is just operated in, then two-position two-way solenoid valve 15 is constantly in power-off
Cut-off state.
Four, active brake states
Detect that vehicle needs to brake by driver does not step on slowly by other onboard sensors (being not drawn into figure)
When brake pedal, electronic control unit 30 just sends instructions to PMSM motors 29, so that it is generated certain torque and master cylinder is driven to push away
Bar 24 is moved to the left, and makes vehicle deceleration or parking to generate friction brake force, electric booster braking system is just operated at this time
Active brake state.Under active brake state, to the full decoupled normal electromagnetism of bi-bit bi-pass in electric booster braking system
15 no power of valve is normally closed.Simultaneously with this, in electric booster braking system to the electromagnetic type pressure-control valve 26 of partly decoupled not
Energization is also at cut-off state.When active brake, brake pedal 1 is simultaneously motionless, driver can by trample brake pedal 1 to
So that pedal travel sensor 2 is generated angular signal and be transferred to electronic control unit 30, terminates active brake state, and then make electronic
Energy assisted braking system enters electric boosted state.
Five, failure Status of Backups
When electric booster system fails, driver can push power-assisted push rod 6 to drive coupling by trampling brake pedal 1
Push rod 11 is moved to the left, and then master cylinder push rod 24 is pushed to be moved to the left, and to which chamber establishes oil pressure before and after master cylinder 19, is produced
Vehicle deceleration or parking when raw friction brake force.Under the Status of Backups that fails, to full decoupled in electric booster braking system
15 no power of two-position two-way solenoid valve it is normally closed.Simultaneously with this, to the electromagnetic type of partly decoupled in electric booster braking system
26 no power of pressure-control valve is also at cut-off state.Since driver pushes coupling push rod 11 forward under the Status of Backups that fails
The spring force of coupling push rod return spring 13 need to be only overcome when mobile, and is not required to overcome bigger than coupling 13 rigidity of push rod return spring
The spring force of many leading screw return springs 12, lead screw pair will not move, the frictional force generated due to leading screw secondary motion
It is not present, therefore the braking burden that driver brakes in brake system non-functional can be mitigated to a certain extent.
Claims (9)
1. a kind of part and full decoupled combined type electric booster braking system, which is characterized in that the part with it is complete
The combined type electric booster braking system of decoupling includes that braking intention generates unit, electric boosted assembly, assist motor assembly, system
Dynamic pedal and brake force decoupling component, brake master cylinder assy, HCU (23) and electronic control unit (30)；
It includes brake pedal push rod (3) that the braking intention, which generates unit,；
The electric boosted assembly includes power-assisted push rod (6), screw rod (7), coupling push rod (11)；
The assist motor assembly includes PMSM motors (29) and deceleration mechanism (31)；
The brake pedal includes decoupling cylinder (16) with brake force decoupling component；
The brake master cylinder assy includes master cylinder (19) and master cylinder push rod (24)；
The braking intention generates unit and is packed into power-assisted push rod (6) and electric boosted assembly by brake pedal push rod (3)
It is connected, electric boosted assembly engages connection by screw rod (7) with the deceleration mechanism (31) of lower section and assist motor assembly is connected
It connects, PMSM motors (29) output end is connect with deceleration mechanism (31) input terminal using shaft coupling, and brake pedal is decoupled with brake force
Component is connect with coupling push rod (11) by decoupling cylinder (16) and electric boosted assembly is connected, and brake master cylinder assy passes through master cylinder
Push rod (24) is connect with decoupling cylinder (16) and brake pedal is connected with brake force decoupling component, the master cylinder in brake master cylinder assy
(19) it is connect with HCU (23) using pipeline, electronic control unit (30) and braking intention generate unit, assist motor assembly, system
Dynamic pedal is connect with HCU (23) using signal wire with brake force decoupling component.
2. part described in accordance with the claim 1 and full decoupled combined type electric booster braking system, which is characterized in that institute
It includes brake pedal (1), pedal travel sensor (2) and idle stroke adjusting screw rod (4) that the braking intention stated, which generates unit,；
The pedal travel sensor (2) is mounted on the holder using axis pin installation brake pedal (1), brake pedal push rod
(3) right end is connected by hinge with brake pedal (1) upper end, in the left end of brake pedal push rod (3) processes in an axial direction
The right end of threaded hole, idle stroke adjusting screw rod (4) processes external threads, and left end and the idle stroke of brake pedal push rod (3) are adjusted
The right end of screw rod (4) is connected through a screw thread, and the idle stroke adjusting screw rod (4) after connection is packed into power-assisted with brake pedal push rod (3)
In the push rod blind hole of push rod (6) right end, the hole of the left side of idle stroke adjusting screw rod (4) and the push rod blind hole of power-assisted push rod (6)
Gap is reserved between bottom surface.
3. part described in accordance with the claim 1 and full decoupled combined type electric booster braking system, which is characterized in that institute
The electric boosted assembly stated further includes push rod return spring (5), leading screw (8), power-assisted assembly shell (9), buffer disc (10), leading screw
Return spring (12) with couple push rod return spring (13)；
The power-assisted push rod (6) is mounted in the centre bore of leading screw (8), and push rod return spring (5) is mounted on power-assisted push rod (6)
In the push rod blind hole of right end, the left end of push rod return spring (5) is fixed on the hole bottom surface of the push rod blind hole of power-assisted push rod (6),
The left end that the right end of push rod return spring (5) generates the brake pedal push rod (3) in unit with braking intention connects, power-assisted
The hole bottom surface of the push rod blind hole of push rod (6) and braking intention stay between generating idle stroke adjusting screw rod (4) right side in unit
There are the gap of 5-7mm, screw rod (7) to be sleeved on leading screw (8), ball, coupling are installed in raceway between screw rod (7) and leading screw (8)
It closes push rod (11) and is placed on the left sides of power-assisted push rod (6), power-assisted push rod (6), leading screw (8), screw rod (7) and couple push rod (11)
Right end is mounted in power-assisted assembly shell (9), and the left end of coupling push rod (11) is located at shell wall on the left of power-assisted assembly shell (9)
Outside, the periphery for coupling the right side of push rod (11) right end push-plate and the left side of leading screw (8) connect, and buffer disc (10) is adopted
It is fixed in the groove on coupling push rod (11) right end push-plate with welding manner, right side and the power-assisted push rod of buffer disc (10)
(6) left side connects；Coupling push rod return spring (13) is inside and outside set with and coaxially arranged with leading screw return spring (12),
The left end of coupling push rod return spring (13) and leading screw return spring (12) is each attached to the left inside wall surface of power-assisted assembly shell (9)
On, the right end of coupling push rod return spring (13) acts on the left side of coupling push rod (11) right end push-plate, leading screw return bullet
The right side of spring (12) is connected with the left side of leading screw (8)；The rigidity of leading screw return spring (12) is more than coupling push rod and returns
The rigidity of position spring (13).
4. part described in accordance with the claim 1 and full decoupled combined type electric booster braking system, which is characterized in that institute
The coupling push rod (11) stated is made of left end decoupling the cylinder piston, intermediate push rod and right end push-plate, and left end decouples the cylinder piston and right end
Push-plate is disc-like structural member, and intermediate push rod is the straight-bar class formation part of equal circle cross-sections, and left end decouples the cylinder piston, intermediate push rod
It is connected successively with right end push-plate, left end decouples the cylinder piston, the rotation conllinear of intermediate push rod and right end push-plate, left end solution
The diameter of coupling the cylinder piston is equal with the internal diameter of decoupling cylinder (16), and left end decouples the cylinder piston and is packed into decoupling cylinder (16) to be connected at sliding
It connects, a cylindrical groove, the axis of rotation of cylindrical groove and right end push-plate is processed on the right side of right end push-plate
Collinearly, cylindrical depth of groove is equal with the thickness of buffer disc (10) in electric boosted assembly.
5. part described in accordance with the claim 1 and full decoupled combined type electric booster braking system, which is characterized in that institute
The power-assisted push rod (6) stated is cylindrical structure part, and the right end of power-assisted push rod (6) is machined with push rod blind hole, push rod blind hole along axis
Axis of rotation and power-assisted push rod (6) rotation conllinear, the diameter of the diameter and leading screw (8) centre bore of power-assisted push rod (6)
It is equal, the equal length of the length and leading screw (8) centre bore of power-assisted push rod (6)；
The screw rod (7) is two-part multi-diameter shaft class formation part, and screw through hole, spiral shell are machined at the axis of rotation of screw rod (7)
It is provided in the inner hole surface of rod through-hole and is combined together the spiral rolling track rolled as ball with the external spiral groove on leading screw (8)
Inner spiral groove；The diameter of left section of screw rod (7) is more than right section of diameter, and the periphery of left section of screw rod (7) is provided with and deceleration mechanism
(31) gear teeth of engagement connection.
6. part described in accordance with the claim 1 and full decoupled combined type electric booster braking system, which is characterized in that institute
The brake pedal stated further includes full decoupled fluid storage compartment (14), two-position two-way solenoid valve (15), master cylinder with brake force decoupling component
Push rod return spring (17), check valve (25), proportional pressure control valve (26), partly decoupled accumulator (27) and hydraulic coupling sense
Device (28)；
The right end of the decoupling cylinder (16) is sleeved in the left end decoupling the cylinder piston of coupling push rod (11), a left side for decoupling cylinder (16)
For end cap in the right end decoupling the cylinder piston of master cylinder push rod (24), master cylinder push rod return spring (17) is sleeved on master cylinder push rod (24)
Push rod on, the left end of master cylinder push rod return spring (17) is fixed on the inner face of decoupling cylinder (16) left cylinder wall, master cylinder push rod
The right end of return spring (17) and the left side of master cylinder push rod (24) right end decoupling the cylinder piston connect, full decoupled fluid storage compartment
(14) it is connected with the upper end of decoupling cylinder (16) by fluid pressure line, in the hydraulic pressure of full decoupled fluid storage compartment (14) and decoupling cylinder (16)
Two-position two-way solenoid valve (15) is provided between pipeline；Partly decoupled accumulator (27) passes through under fluid pressure line and decoupling cylinder (16)
End connection is provided with ratio pressure control between partly decoupled accumulator (27) and the fluid pressure line of decoupling cylinder (16) with parallel way
Valve (26) processed and check valve (25), the inlet of check valve (25) are connect with the liquid in-out mouth of partly decoupled accumulator (27), than
The liquid in-out mouth connection of accumulator (27) when the liquid outlet and partly decoupled of example pressure-control valve (26), in partly decoupled accumulator
(27) hydraulic pressure force snesor is provided on the fluid pressure line between liquid in-out mouth and the liquid outlet of proportional pressure control valve (26)
(28)。
7. part described in accordance with the claim 1 and full decoupled combined type electric booster braking system, which is characterized in that institute
The brake master cylinder assy stated includes that fluid reservoir (18), second piston return spring (20), second piston (21) and first piston return
Position spring (22)；
The second piston (21) is mounted in master cylinder (19), and master cylinder is divided into left chamber and right chamber, first piston return spring
(22) it is in right chamber, the left side of the right end and the first piston in master cylinder push rod (24) of first piston return spring (22) connects
Connection is touched, the left end of first piston return spring (22) is connected with the right side of second piston (21), second piston return
Spring (20) is mounted in left chamber, and the right end of second piston return spring (20) contacts company with the left side of second piston (21)
It connects, the left end of second piston return spring (20) acts on the inner face of master cylinder (19) left cylinder wall, the left and right chamber of master cylinder (19)
It is connect with fluid reservoir (18) using fluid pressure line, the lower end of the left and right chamber of master cylinder (19) is using fluid pressure line and hydraulic control list
First (23) connection.
8. part described in accordance with the claim 1 and full decoupled combined type electric booster braking system, which is characterized in that institute
The master cylinder push rod (24) stated is made of first piston, push rod and right end the decoupling the cylinder piston of left end, and first piston is decoupled with right end
The cylinder piston is disc-like structural member, and push rod is the straight-bar class formation part of equal circle cross-sections, and first piston, push rod and right end decouple cylinder
Piston is connected successively, first piston, push rod and right end decoupling the cylinder piston rotation conllinear, the diameter of first piston with
The internal diameter of master cylinder (19) is equal, and it is equal with the internal diameter for decoupling cylinder (16) that right end decouples the cylinder piston diameter；The right side of master cylinder push rod (24)
End decoupling the cylinder piston is packed into decoupling cylinder (16) at being slidably connected, and the first piston of master cylinder push rod (24) is packed into the right side of master cylinder (19)
At being slidably connected in chamber.
9. part described in accordance with the claim 1 and full decoupled combined type electric booster braking system, which is characterized in that institute
The electronic control unit (30) and braking intention stated generate unit, assist motor assembly, brake pedal and brake force decoupling component
It is connect using signal wire with HCU (23) and refers to：
Electronic control unit (30) passes through harness and pedal travel sensor (2), two-position two-way solenoid valve (15), HCU (23), ratio
Example pressure-control valve (26), hydraulic pressure force snesor (28) are connect with the signal end of PMSM motors (29).
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| CN110228459A (en) * | 2019-06-12 | 2019-09-13 | 吉林大学 | A kind of electric power brake mechanism |
| CN111990170A (en) * | 2020-09-10 | 2020-11-27 | 段建梅 | Edible fungus bag production system |
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| CN111990170A (en) * | 2020-09-10 | 2020-11-27 | 段建梅 | Edible fungus bag production system |
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