CN101708733A - Electric power-assisted steering system - Google Patents
Electric power-assisted steering system Download PDFInfo
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- CN101708733A CN101708733A CN200910237522A CN200910237522A CN101708733A CN 101708733 A CN101708733 A CN 101708733A CN 200910237522 A CN200910237522 A CN 200910237522A CN 200910237522 A CN200910237522 A CN 200910237522A CN 101708733 A CN101708733 A CN 101708733A
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- steering system
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Abstract
The invention provides an electric power-assisted steering system applied to the field of automobile parts. The electric power-assisted steering system is composed of mechanical steering device, a torque sensor mounted on a steering input shaft, a speed sensor, an electronic control unit receiving a torque signal and a speed signal, a power-assisted motor controlled by the electronic control unit and a steering output shaft connected with a power-assisted motor shaft. The system is characterized in that the power-assisted motor shaft and the steering output shaft are integrated as a whole by using an elongated asynchronous motor as the power-assisted motor, so that reducing mechanism is not required and the torque output by the power-assisted motor can be added to the steering output shaft directly. Such a structurally-novel electric power-assisted steering system has simple structure and can bring good operating hand feeling to drivers.
Description
Technical field
Electric boosting steering system is used for the auto parts and components field.
Background technology:
Electric boosting steering system is since producing, and also different according to the position that the different assisted electric machines of preceding axle load are arranged, the position electric boosting steering system of arranging according to the assisted electric machine is divided into three types:
First type is steering shaft booster type steering swivel system: promptly electrical motor links to each other with steering shaft by retarder, as shown in Figure 1, steering shaft booster type electric servo steering system is by the mechanical type steering hardware basically, magnetic clutch, torque sensor, rotary angle transmitter, car speed sensor, controller, three-phase squirrel cage electrical motor and retarder are formed, its principle of work is as follows: when handling steering handwheel, be contained in the torque sensor that turns on the input shaft, rotary angle transmitter constantly detects the torque that turns to input shaft, angular signal, these signals and vehicle speed signal are input to electronic control unit simultaneously, electronic control unit is controlled the size and Orientation of assisted electric machine output torque according to these incoming signals.The torque of electrical motor is delivered on the motor turning output shaft after increasing square through magnetic clutch by the retarder deceleration, makes it to obtain a turning force that adapts with vehicle behavior.
Second type is deflector miniature gears booster type steering swivel system: promptly electrical motor links to each other with the deflector miniature gears by retarder, as shown in Figure 2, its principle of work and steering shaft booster type electric servo steering system are similar, and difference is that the power-assisted of assisted electric machine directly is added on the deflector miniature gears.
The third class shape is a steering rack axle booster type steering swivel system: promptly electrical motor links to each other with the steering gear rack axle by retarder, as shown in Figure 3, its principle of work and steering shaft booster type electric servo steering system are similar, and difference is that the power-assisted of assisted electric machine directly is added on the steering rack.
Summary of the invention
The objective of the invention is to be used for the assisted electric machine by introducing AC asynchronous motor, adopting the assisted electric arbor simultaneously and turning to output shaft is the integral type new structure, reaches the purpose of simplifying the alternating current electric power steering system structure, improving system reliability.
The invention provides a kind of later-model electric boosting steering system, its by the mechanical type steering hardware, be installed in the torque sensor that turns on the input shaft, car speed sensor, reception dtc signal and the electronic control unit of vehicle speed signal, the assisted electric machine that is controlled by an electronic control unit, the output shaft that turns to that is connected with the assisted electric arbor forms.Wherein, bearing circle 1 links to each other with turning to input shaft 2-1, turn to rotary angle transmitter 4, torque sensor 3 are housed on the input shaft 2-1, and with assisted electric machine 7 the axle link to each other, the axle of assisted electric machine 7 is an one with turning to output shaft 2-2, the signal of rotary angle transmitter 4, torque sensor 3 is passed to controller 5 by signal wire (SW), the control signal of controller 5 is passed to assisted electric machine 7 by signal wire (SW), turn to output shaft 2-2 to link to each other with turning to miniature gears 9 by connecting rod, turn to miniature gears 9 to link to each other with steering rack 10, steering rack 10 links to each other with wheel 12 by pipe link 11.Wherein, assisted electric arbor and to turn to output shaft be integral type directly is added in the torque of assisted electric machine output and turns on the output shaft.Above-mentioned assisted electric machine can be the three-phase squirrel cage electrical motor.
Later-model electric boosting steering system of the present invention has following characteristics:
1) the three-phase squirrel cage electrical motor has characteristics firm in structure, simple, big overload torque, can make the power smaller motor export big torque.
2) owing to having saved speed reduction gearing, so can guarantee that net effciency (about 80%) is higher than the system (about 90%*60%=54%) that adds upper reducer (the big retarding ratio mostly is the turbine worm formula) based on DC motor although when inversion, lose a little energy.
3) the control system price of three-phase squirrel cage electrical motor can be high, so but can lower again owing to having saved the retarder total price.
4) this structure make electrical motor beginning during power-assisted since the hysteresis that speed reduction gearing elasticity, inertia cause reduce, so good hand touch.
Description of drawings
Accompanying drawing 1: traditional steering shaft booster type steering swivel system;
Accompanying drawing 2: traditional deflector miniature gears booster type steering swivel system;
Accompanying drawing 3: traditional steering rack axle booster type steering swivel system;
Accompanying drawing 4: assisted electric arbor of the present invention is the steering swivel system of integral type with turning to output shaft.
Wherein: 1, bearing circle 2-1, turn to input shaft 2-2, turn to output shaft
3, torque sensor 4, rotary angle transmitter 5, controller
6, magnetic clutch 7, assisted electric machine 8, retarder
9, deflector miniature gears 10, steering rack 11, pipe link
12, wheel
The specific embodiment
The invention provides a kind of assisted electric arbor and turn to output shaft integral electric servo steering system.
Motor reel also is to be made up of mechanical type steering hardware, torque sensor, car speed sensor, controller, three-phase squirrel cage electrical motor with turning to output shaft integral electric servo steering system.
Its principle of work is as follows: when handling steering handwheel, be contained in the torque sensor that turns on the input shaft and constantly detect the dtc signal that turns to input shaft, this signal and vehicle speed signal are input to electronic control unit simultaneously, electronic control unit is controlled the size and Orientation of assisted electric machine output torque according to these incoming signals.The torque of electrical motor output directly is added in and turns on the output shaft, makes it to obtain a turning force that adapts with vehicle behavior.
Motor reel and turn to the design considerations of output shaft integral electric servo steering system as follows:
1) know that by table 1 rotating the car maximum torque is 28.5Nm, if by 1: 1 power-assisted word, the electrical motor of 0.7kw just can meet the demands, the optional more powerful electrical motor of the words of big if desired power-assisted ratio, so from moment of torsion export feasible fully.
2) say the simple in structure of interconnected cage motor from the angle of making, be easy to make slender structure, motor reel and turn to output shaft to be made of one.
3) location information of motor reel can obtain by the corner information that turns to output shaft.
Table 1 rotates the required ultimate torque of vehicle steering (actual measurement) unit: Nm
| Operating mode | Dry asphalt surface | Dry cement pavement |
| Static non helping hand | ??28.5 | ??22.5 |
Wherein: vehicle is Santana's coventional type car, and the bearing circle radius is 15cm.
Table 2 three-phase squirrel cage adjustable frequency motor output torque (news from Beijing motivation head factory provides)
| Motor power (output) (kw) | Maximum/torque rating (Nm) | Maximum overload torque (Nm) |
| ??0.4 | ??4.5 | ??8.2 |
| ??0.7 | ??8.2 | ??15.1 |
| ??1.0 | ??11.4 | ??21.5 |
Annotate: in fact, maximum overload torque short-term can reach 3-5 times of torque rating.
Herein, the assisted electric machine is a kind of of electrical motor; Electronic control unit is that electronic controller is a kind of of controller.
Claims (4)
1. electric boosting steering system, by the mechanical type steering hardware, be installed in the torque sensor that turns on the input shaft, car speed sensor, receive the electronic control unit of dtc signal and vehicle speed signal, the assisted electric machine that is controlled by an electronic control unit, the output shaft that turns to that is connected with the assisted electric arbor is formed, it is characterized in that: bearing circle (1) links to each other with turning to input shaft (2-1), turn to rotary angle transmitter (4) and torque sensor (3) are housed on the input shaft (2-1), and with assisted electric machine (7) the axle link to each other, the axle of assisted electric machine (7) is an one with turning to output shaft (2-2), rotary angle transmitter (4), the signal of torque sensor (3) is passed to controller (5) by signal wire (SW), the control signal of controller (5) is passed to assisted electric machine (7) by signal wire (SW), turn to output shaft (2-2) to link to each other with turning to miniature gears (9) by connecting rod, turn to miniature gears (9) to link to each other with steering rack (10), steering rack (10) links to each other with wheel (12) by pipe link (11); Assisted electric arbor and to turn to output shaft be integral type directly is added in the torque of assisted electric machine output and turns on the output shaft.
2. electric boosting steering system as claimed in claim 1 is characterized in that: described assisted electric machine is the three-phase squirrel cage electrical motor.
3. electric boosting steering system as claimed in claim 2 is characterized in that: described three-phase squirrel cage electrical motor is a slender structure.
4. electric boosting steering system as claimed in claim 1 is characterized in that: the location information of assisted electric arbor obtains by the corner information that turns to output shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910237522A CN101708733A (en) | 2009-11-17 | 2009-11-17 | Electric power-assisted steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910237522A CN101708733A (en) | 2009-11-17 | 2009-11-17 | Electric power-assisted steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101708733A true CN101708733A (en) | 2010-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910237522A Pending CN101708733A (en) | 2009-11-17 | 2009-11-17 | Electric power-assisted steering system |
Country Status (1)
| Country | Link |
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| CN (1) | CN101708733A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973311A (en) * | 2010-10-13 | 2011-02-16 | 株洲易力达机电有限公司 | Integral active electric power-assisted steering mechanical structure |
| CN102229347A (en) * | 2011-04-27 | 2011-11-02 | 纽贝耳汽车(杭州)有限公司 | Electric power-assisted steering system of electric vehicle and power-assisted steering method thereof |
| CN102556146A (en) * | 2010-12-20 | 2012-07-11 | 西安航天远征流体控制股份有限公司 | Electric power steering transmission mechanism and electric power steering system |
| CN104044635A (en) * | 2014-05-30 | 2014-09-17 | 重庆龙润汽车转向器有限公司 | Assembly of automobile power-assisted steering controller and mounting bracket |
| CN105216862A (en) * | 2015-10-09 | 2016-01-06 | 浙江工业大学 | A kind of three-wheel foklift truck electric power-assisted steering apparatus |
| CN105645315A (en) * | 2016-01-05 | 2016-06-08 | 浙江工业大学 | Electric power steering control method for three-fulcrum forklift |
| CN108128348A (en) * | 2017-11-16 | 2018-06-08 | 南京航空航天大学 | Electric boosting steering system and its Multipurpose Optimal Method based on flock of birds algorithm |
| CN110920747A (en) * | 2019-12-12 | 2020-03-27 | 上海衡鲁汽车科技有限公司 | Motor steering device of active steering system and corner power-assisted torque estimation method |
-
2009
- 2009-11-17 CN CN200910237522A patent/CN101708733A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973311A (en) * | 2010-10-13 | 2011-02-16 | 株洲易力达机电有限公司 | Integral active electric power-assisted steering mechanical structure |
| CN102556146A (en) * | 2010-12-20 | 2012-07-11 | 西安航天远征流体控制股份有限公司 | Electric power steering transmission mechanism and electric power steering system |
| CN102229347A (en) * | 2011-04-27 | 2011-11-02 | 纽贝耳汽车(杭州)有限公司 | Electric power-assisted steering system of electric vehicle and power-assisted steering method thereof |
| CN102229347B (en) * | 2011-04-27 | 2012-09-12 | 纽贝耳汽车(杭州)有限公司 | Electric power-assisted steering system of electric vehicle and power-assisted steering method thereof |
| CN104044635A (en) * | 2014-05-30 | 2014-09-17 | 重庆龙润汽车转向器有限公司 | Assembly of automobile power-assisted steering controller and mounting bracket |
| CN105216862A (en) * | 2015-10-09 | 2016-01-06 | 浙江工业大学 | A kind of three-wheel foklift truck electric power-assisted steering apparatus |
| CN105645315A (en) * | 2016-01-05 | 2016-06-08 | 浙江工业大学 | Electric power steering control method for three-fulcrum forklift |
| CN108128348A (en) * | 2017-11-16 | 2018-06-08 | 南京航空航天大学 | Electric boosting steering system and its Multipurpose Optimal Method based on flock of birds algorithm |
| CN110920747A (en) * | 2019-12-12 | 2020-03-27 | 上海衡鲁汽车科技有限公司 | Motor steering device of active steering system and corner power-assisted torque estimation method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100519 |