CN109204283A - A kind of electronic hydraulic brake system obtaining braking intention based on motor - Google Patents
A kind of electronic hydraulic brake system obtaining braking intention based on motor Download PDFInfo
- Publication number
- CN109204283A CN109204283A CN201811271713.6A CN201811271713A CN109204283A CN 109204283 A CN109204283 A CN 109204283A CN 201811271713 A CN201811271713 A CN 201811271713A CN 109204283 A CN109204283 A CN 109204283A
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- Prior art keywords
- motor
- motion module
- brake
- pedal
- gear
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- 230000005611 electricity Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 abstract description 21
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
-
- 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
- B60T13/10—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 fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
Abstract
A kind of electronic hydraulic brake system obtaining braking intention based on motor, including pedal, spring, the first motion module, the second motion module, third motion module, the second motor, electronic control unit, automatically controlled circuit, ABS/ESP module and various Hydraulic Elements.First motion module is made of lead screw, feed screw nut, first motor.Second motion module is made of feed screw nut, gear, electromagnetic clutch, rack gear.Third motion module is made of worm screw, turbine and rack structure.Wherein first motor can be used as the brake signal that generator obtains driver, can also be used as motor for providing brake force to realize that brake fade is protected, which saves manufacturing cost instead of sensor；Two main fluid pressure lines of the mechanical connection and bi-motor of pedal and hydraulic cylinder can prevent brake fade, to greatly improve the safety of automobile.
Description
Technical field
The present invention relates to automobile brake technical field, especially a kind of electro-hydraulic system that braking intention is obtained based on motor
Dynamic system.
Background technique
Electronic hydraulic brake system (EHB) is one kind of brake-by-wire, and driver steps on pedal, does not need mechanical connection handle
The power of driver's pedal passes to brake disc or brake drum.Its principle is by pedal force sensor and displacement sensor etc.
Device obtains the braking intention of driver, then provides brake force using motor according to the braking intention of driver.
Major part deceleration of electrons hydraulic system is by brake pedal unit, hydraulic drive unit, brake execution unit, control now
The part such as unit processed, sensor forms.Existing electronic hydraulic brake system mostly uses single motor single fluid pressure line, when motor loses
Effect or the fluid pressure line braking system that goes wrong will fail, and safety is poor.So needing us to original hydraulic braking
System improves.For example use bi-motor electronic hydraulic brake system, when one of motor failure, another motor meeting
Brake force is provided in time and provides fail safe for vehicle.
A kind of electronic hydraulic brake system for Dual-motors Driving that number of patent application is 201410008403.0.Wherein use
Bi-motor realizes that brake fade is protected.Brake fade is typically due to fluid pressure line liquid level deficiency and fluid pressure line enters
What air caused.The main fluid pressure line for connecting master cylinder, since by higher pressure, it causes brake fade for a long time
Main component.Above-mentioned patent bi-motor has shared a fluid pressure line, once fluid pressure line, which goes wrong, cannot realize braking
Protection.The present invention is used to prevent motor failure using bi-motor, prevents fluid pressure line liquid level to be not enough to by double main fluid pressure lines
And fluid pressure line enters the brake fade of air initiation.Present most electronic hydraulic brake system all uses various complexity
Sensor, it is at high cost, installation is complicated.We can obtain electromagnetic signal by motor, be used to according to the characteristic of motor
Replace numerous sensors, save the cost.
Summary of the invention
The invention proposes a kind of electro-hydraulics that braking intention is obtained based on motor in view of the above problems in the prior art
Braking system is obtained operator brake intention by one of motor and eliminates various sensors.It is double to realize bi-motor
Main fluid pressure line design, keeps entire electronic hydraulic brake system safer, cost is lower.
The present invention can be achieved through the following technical solutions: a kind of electro-hydraulic system obtaining braking intention based on motor
Dynamic system, including pedal, spring, the first motion module, the second motion module, third motion module, the second motor, automatically controlled
Unit, automatically controlled circuit, AD converter and various Hydraulic Elements.First motion module is by lead screw, feed screw nut and
One motor form.Second motion module is made of feed screw nut, gear, electromagnetic clutch, rack gear.Third motion module be by
Worm screw, turbine and rack structure composition.Hydraulic Elements include hydraulic cylinder, solenoid valve, fluid pressure line, each wheel cylinder.
In braking, driver steps on pedal, and pedal travel passes to first motor by first motion module,
Middle pedal is connected with lead screw, and the transform linear motion of lead screw is at the rotation of feed screw nut, and wherein feed screw nut and rotor are solid
Fixed connection, rotor rotation.The first motor power generation at this time, generates induced electromotive force, the mould electric signal of generation passes through AD
Converter is converted into several electric signals and passes to electronic control unit.The first motor can not only be used for generator can be used as motor again
To use；The brake signal that can be used to obtain driver as generator when using is used to realize that failure is protected when as motor
Shield.
The electromagnetic clutch disconnects main shaft and the gear when the second motor offer brake force, first electricity
Machine and the pedal cannot provide brake force；The electromagnetic clutch connects main shaft and the gear when second motor failure
It connects, provides brake force by the first motor and the pedal.
Compared with the background technology, the present invention, have the beneficial effect that (1) above-mentioned first motor can be used as generator again
Can be used as motor come using, it is characterised in that can be used to obtain the brake signal of driver when using as generator,
Complicated sensor is eliminated, is reduced costs.
(2) transmitting that first motor and pedal brake power are controlled using electromagnetic clutch avoids pedal travel and
Two motors interfere, and prevent brake force and provide the phenomenon of inaccuracy.
(3) fail safe when braking is realized using the double main fluid pressure lines of bi-motor, improve the safety of vehicle.
Detailed description of the invention
Fig. 1 is the integrally-built schematic diagram of the present invention.
Fig. 2 is first motor schematic illustration of the present invention.
Label in Fig. 1 indicates: 1-brake pedal；2-lead screws；3,6-feed screw nut；4-rotors；5-electricity
Machine stator；7-main shafts；8,10-gear；9-electromagnetic clutch；11,16-rack gear；12-springs；13-the second motor；
14-worm screws；15-turbines；17,18-hydraulic cylinder；19,20,22-fluid pressure line；21-solenoid valves；23-ABS/ESP moulds
Block；24-electronic control unit；25,26,37,28,29-automatically controlled circuit；30-AD conversion modules, the 31-the first motion module；32—
Second motion module；33-third motion modules；34-first motors.
Label indicates in Fig. 2: 101-power supplys；102,110-copper ring；103-conducting wires；104-the poles permanent magnet N；105—
Rotor；106-permanent magnet S poles；107-commutators；108-resolvers；109,112,111-automatically controlled circuit； 113,
114-electromagnetic relays.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing of the invention, to technology
Scheme is clearly and completely described.
In braking, driver steps on pedal 1, and pedal travel passes to first motor 34 by the first motion module 31,
Middle pedal 1 is connected with lead screw 2, and the transform linear motion of lead screw 2 is at the rotation of feed screw nut 3, and wherein feed screw nut 3 and motor turn
Son 4 is fixedly connected, and rotor 4 rotates, and first motor 34 generates electricity, and generates induced electromotive force.Mould electric signal passes through AD converter
30, which are converted into several electric signals, passes to electronic control unit 24.It is public in conjunction with dc generator induced electromotive force formula, image and mechanics
Formula determines how to describe pedal force and pedal displacement with the electric signal of first motor 34.Dc generator fundamental formular；WhereinFor induced electromotive force,For the coefficient of potential,For rotor speed.The size of induced electromotive force and revolving speed at
The direction of direct ratio, potential is determined by the direction of revolving speed.
According to formula；WhereinFor angular displacement,For rotor speed,For electromotive force time of origin.Rotor has been determined
After angular displacement, according to relevant parameters such as gear radius, it is not difficult to find out the displacement of pedal.
According to force equation；WhereinTo act on the torque on rotor.After determining torque, according to gear radius
Equal relevant parameters, are not difficult to find out the active force on pedal.
Electronic control unit 24 analyzes electric signal, drives the second motor 13 that brake force is passed to liquid by third motion module 33
Press element.Second motor 13 drives worm and gear rotation, and movement is passed to rack gear 16, rack gear 16 and 17 phase of hydraulic cylinder by turbine 15
Even.The movement mechanism has changed the rotary motion of motor into linear motion.At this time solenoid valve 21 be connected to fluid pressure line 19 with
Fluid pressure line 22, brake fluid reach ABS/ESP module and anti-lock braking system/electronic stability control system through fluid pressure line
System module, effect is the hydraulic braking force for adjusting each wheel cylinder.
When second motor 13 or fluid pressure line 19 fail, ECU can drive first motor 34 to provide system as motor at this time
Power.Brake force is transmitted to hydraulic on element by first motor 34 by the second motion module.First motor 34 passes through electromagnetism
Power makes the rotation of rotor 4 to make lead screw 2 move in a straight line, and lead screw 2 drives feed screw nut 6 to rotate again, 6 outer ring of feed screw nut
It is engaged with gear 8, gear 8 is structure as a whole with main shaft 7, and gear 10 is needed could be the same as main shaft 7 by the effect of electromagnetic clutch 9
Connection.Electronic control unit 24, which controls electromagnetic clutch 9, at this time connect main shaft 7 with gear 10, and controls solenoid valve 21 and make hydraulic tube
Road 20 is connected to fluid pressure line 22.The rotation of main shaft 7 is transmitted to hydraulic cylinder 18 by gear 10 and rack gear 11, and brake force passes through liquid
Pressure pipe road is applied to each wheel cylinder.
Above embodiment we need first motor 34 can be used as generator again and can be used as motor come using.Root
Similar to electric generator structure according to motor, we can provide two active circuits to first motor 34, meet two kinds of operating conditions
Demand.Concrete principle figure is shown in Fig. 2.
Electronic control unit controls electromagnetic relay and determines which route connected according to working condition, and electromagnetic relay 114 is normally opened,
Electromagnetic relay 113 is normally closed.After driver steps on pedal, rotor 105 is driven, first motor 34 generates electricity, the telecommunications of generation
Number electronic control unit 24 is passed to by resolver.When the failure of the second motor 13, electronic control unit 24 closes electromagnetic relay 114,
Electromagnetic relay 113 is opened, motor circuit is connected.Power supply 101 is that rotor 105 provides electric current, in magnetic fields lower rotor part 105
Rotation provides brake force by first motor 34 so that feed screw nut 3 be driven to rotate.
Driver unclamps the process of pedal 1, so that the first motor 34 is generated inverse electromotive force, can distinguish active brake mistake
Journey and cancellation braking process.The intention for cancelling braking process driver can be obtained by method identical with active brake process
It arrives.The mechanical connection of brake pedal 1 Yu hydraulic cylinder 18 also may be implemented in above-mentioned electronic hydraulic brake system, as long as electronic control unit
24 control electromagnetic clutch 9 connect main shaft 7 with gear 10, and pedal 1 may be implemented and hydraulic cylinder 18 is mechanically connected, step on pedal
Also Braking is had when 1 on wheel.
Claims (3)
1. a kind of electronic hydraulic brake system for obtaining braking intention based on motor comprising: pedal 1, spring 12, first move
Module 31, the second motion module 32, third motion module 33, the second motor 13, electronic control unit 24, ABS/ESP module 23 and
Various Hydraulic Elements, it is characterised in that: first motion module 31 is by lead screw 2, feed screw nut 3 and 34 groups of first motor
At second motion module 32 is made of feed screw nut 6, gear 10, electromagnetic clutch 9 and rack gear 11, the third fortune
Dynamic model block 33 is by 16 structure composition of worm screw 14, turbine 15 and rack gear.
2. a kind of electronic hydraulic brake system for being obtained braking intention based on motor according to claim 1, feature are existed
In: the first motor 34 can not only be used for generator again and can be used as motor come using；It can be used to when being used as generator
The brake signal for obtaining driver is used to realize fail safe when as motor.
3. a kind of electronic hydraulic brake system for being obtained braking intention based on motor according to claim 1, feature are existed
In: the electromagnetic clutch 9 disconnects main shaft and the gear 10 when the offer of the second motor 13 brake force, first electricity
Machine 34 and the pedal 1 cannot provide brake force；When second motor 13 fails the electromagnetic clutch 9 make main shaft with it is described
Gear 10 connects, and provides brake force by the first motor 34 and the pedal 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811271713.6A CN109204283B (en) | 2018-10-29 | 2018-10-29 | Electronic hydraulic braking system for acquiring braking intention based on motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811271713.6A CN109204283B (en) | 2018-10-29 | 2018-10-29 | Electronic hydraulic braking system for acquiring braking intention based on motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109204283A true CN109204283A (en) | 2019-01-15 |
| CN109204283B CN109204283B (en) | 2024-02-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811271713.6A Active CN109204283B (en) | 2018-10-29 | 2018-10-29 | Electronic hydraulic braking system for acquiring braking intention based on motor |
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| Country | Link |
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| CN (1) | CN109204283B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529235A (en) * | 2019-07-31 | 2019-12-03 | 湖南天雁机械有限责任公司 | A kind of rectilinear path electronic actuators formula turbocharger |
| CN111824106A (en) * | 2020-07-31 | 2020-10-27 | 清华大学 | Brake-by-wire system with complete failure operation capability and vehicle |
| CN112356817A (en) * | 2020-11-25 | 2021-02-12 | 吉林大学 | Unmanned automobile braking system with backup mode and control method thereof |
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2018
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| DE102009031672A1 (en) * | 2009-07-04 | 2011-01-05 | Ipgate Ag | Brake system for use in hybrid vehicle, has auxiliary piston feeding hydraulic medium over steering valve from work space to generation pressure into brake circuits and conveying hydraulic medium into supply container |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529235A (en) * | 2019-07-31 | 2019-12-03 | 湖南天雁机械有限责任公司 | A kind of rectilinear path electronic actuators formula turbocharger |
| CN111824106A (en) * | 2020-07-31 | 2020-10-27 | 清华大学 | Brake-by-wire system with complete failure operation capability and vehicle |
| CN112356817A (en) * | 2020-11-25 | 2021-02-12 | 吉林大学 | Unmanned automobile braking system with backup mode and control method thereof |
| CN112356817B (en) * | 2020-11-25 | 2021-07-23 | 吉林大学 | Unmanned automobile braking system with backup mode and control method thereof |
Also Published As
| Publication number | Publication date |
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| CN109204283B (en) | 2024-02-27 |
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