CN100335331C - Energy-saving control method for electro magnetic clutch of electric assisted steering device - Google Patents
Energy-saving control method for electro magnetic clutch of electric assisted steering device Download PDFInfo
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- CN100335331C CN100335331C CNB2004100140874A CN200410014087A CN100335331C CN 100335331 C CN100335331 C CN 100335331C CN B2004100140874 A CNB2004100140874 A CN B2004100140874A CN 200410014087 A CN200410014087 A CN 200410014087A CN 100335331 C CN100335331 C CN 100335331C
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- magnetic clutch
- steering device
- electric current
- electro magnetic
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Abstract
The present invention relates to an electric power assisted steering device of an automobile, particularly to an energy saving control method for an electro magnetic clutch of an electric power assisted steering device. The present invention can automatically adjust the intensity of electric current of the electro magnetic clutch according to different power assisted situations, and the purposes of energy saving and environmental protection can be realized. The present invention utilizes a single chip computer (1) in the electric power assisted steering device to determine a torque moment transferred by the electro magnetic clutch (8) under the condition according to an external signal. The electric current required by the electro magnetic clutch (8) is determined. According to the electric current, a driving signal of a PWM wave (2) with a proper duty ratio is emitted. The signal is magnified to control the on-off of a VMOS pipe (9) with high power. Therefore, the electric current of the electro magnetic clutch (8) is controlled.
Description
Affiliated technical field
The present invention relates to vehicle electric power-assisted steering device, refer in particular to a kind of energy-saving electric booster steering device magnetic clutch control method, can be according to the size of current of the different automatically regulating magnetic clutchs of power-assisted situation, to realize energy-conservation and purpose environmental protection.
Background technology
In automobile electric booster steering system, usually adopt magnetic clutch.Magnetic clutch has positive effect aspect the trouble diagnosing of electric booster steering device and the guarantee driving safety.In existing electric booster steering device, all be to adopt combination that switch circuit controls magnetic clutch and separate, the combination of the control unit of electric boosting steering system (ECU) control magnetic clutch with separate.In the time of the magnetic clutch conducting, power line voltage is added on the power-transfer clutch, and the electric current by magnetic clutch is a direct current (DC), and its size is observed Ohm's law.Owing to guarantee that (work such as between the 10V～14V), the electric current by magnetic clutch will often fluctuate like this in certain power line voltage scope the magnetic clutch design-calculated time.During design, be to guarantee in the power line voltage scope that requires, can both transmit needed maximum torque, just in minimum power supply voltage, (such as 10V), also can transmit maximum torque reliably by the magnetic clutch electric current.So, in the time of maximum power supply voltage (such as 14V), though transmitting torque fully reliably, at this moment power supply increases by the electric current of magnetic clutch, and the electric energy of Xiao Haoing has also increased like this, and this increase then is unnecessary.The maximum power torque of electric booster steering device is subjected to electronic control unit controls, ECU provides different power torques according to different speed of a motor vehicle control motors, maximum power torque only occurs under the extremely low situation of pivot stud and the speed of a motor vehicle, along with the raising of the speed of a motor vehicle, the power torque that electrical motor provides should reduce gradually.Therefore power-transfer clutch need all will not transmit maximum power torque under any power-assisted situation.Power-transfer clutch institute can torque transmitted combines pressure with it and is directly proportional, and is directly proportional with electric current by clutch coil in conjunction with pressure.Therefore, under the situation of the less power torque of clutch transmits, can reduce electric current by power-transfer clutch.And in the existing technology, the electric current by power-transfer clutch under any power-assisted situation can guarantee to transmit maximum power torque at least, and the work operation of this fixed current has just caused the waste of energy, is unfavorable for energy-conservation and environmental protection.
Summary of the invention
The purpose of this invention is to provide a kind of energy-conservation electric booster steering device magnetic clutch control method, it can change the electric current by power-transfer clutch automatically according to different power-assisted situations, to reach the purpose of vehicle energy saving and environmental protection.
The technical solution adopted for the present invention to solve the technical problems is:
It is characterized in that being provided with by the resistance that is linked in sequence, aerotron, high-power V metal-oxide-semiconductor, resistance and be connected the PWM driving circuit that diode that two ends constitute the loop is formed magnetic clutch, driving circuit is by the electric current of pulse-width modulation waveform (PWM) control magnetic clutch.
During work, micro controller system in the electric power-assisted steering apparatus is according to the signal in the external world, determine that magnetic clutch is wanted torque transmitted in this case, and definite thus needed electric current of magnetic clutch, send PWM ripple drive signal with suitable dutycycle according to this electric current, this signal goes to control the conducting and the shutoff of high-power V metal-oxide-semiconductor through after amplifying, thereby reaches the purpose of control magnetic clutch electric current.
The invention has the beneficial effects as follows the expenditure of energy that can reduce magnetic clutch, can reach the purpose of vehicle energy saving and environmental protection.
Description of drawings
Fig. 1 is an embodiment of the energy-saving electric booster steering device magnetic clutch of the present invention control method.
In the accompanying drawing: 1-micro controller system 2-PWM ripple A 3-resistance 4-aerotron 5-resistance 6-power supply 7-diode 8-magnetic clutch 9-high-power V metal-oxide-semiconductor 10-PWM ripple B
The specific embodiment
Realize an enforcement of control method, as shown in Figure 1, by the resistance that is linked in sequence (3), aerotron (4), high-power V metal-oxide-semiconductor (9), resistance (5) and be connected the driving circuit that diode (7) that magnetic clutch (8) two ends constitute the loop is formed magnetic clutch (8).
During work, produce PWM ripple A by micro controller system (1), by resistance (3) control aerotron (4), resistance (3) plays the effect of current-limiting protection micro controller system (1) and aerotron (4) here; Voltage signal by the output of aerotron (4) collecting electrode drives high-power V metal-oxide-semiconductor (9) drive magnetic clutch (8) work, and aerotron (4) plays the effect of level conversion here, and makes level reverse; In circuit, resistance (5) produces as pull-up resistor and is operated in complete conducting state, at this moment conducting resistance minimum when enough control voltage makes high-power V metal-oxide-semiconductor (9) conducting; Diode (7) plays the flywheel diode effect, and magnetic clutch (8) is received on the working power (6); Another road PWM ripple B (10) is used for controlling assist motor work.Micro controller system (1) is according to the signal in the external world, the steering-wheel torque that applies such as automobile speed, chaufeur, the voltage signal of power supply (6) etc., determine the needed electric current of magnetic clutch (8) in this case, send PWM ripple A (2) drive signal with suitable dutycycle according to this electric current, this signal is through being gone to control later the conducting and the shutoff of high-power V metal-oxide-semiconductor (9) by resistance (3), aerotron (4), resistance amplifications such as (5).As PWM ripple A (2) when being in high level, make aerotron (4) be in saturation conditions, the grid of high-power V metal-oxide-semiconductor (9) be in low level and by, when PWM ripple A (2) is in low level the time, make aerotron (4) be in off condition, the grid of high-power V metal-oxide-semiconductor (9) is in high level and conducting fully.In the time of high-power V metal-oxide-semiconductor (9) conducting, electric current flows back to power supply (6) by power supply (6) again by magnetic clutch (8) and high-power V metal-oxide-semiconductor (9); When high-power V metal-oxide-semiconductor (9) turn-offed, owing to have inductance by the loop of magnetic clutch (8), electric current had inertia, can not change immediately, just constituted the loop by diode (7), and at this time diode (7) plays the effect of afterflow.Because the PWM wave frequency is higher,, can not make the mis-behave of magnetic clutch (8) so at a PWM in wave period, electric current changes very little.If require magnetic clutch (8) torque transmitted big, then require also big by the electric current of magnetic clutch (8), micro controller system (1) is just exported the PWM ripple A (2) of a little dutycycle, and the dutycycle of high-power V metal-oxide-semiconductor (9) conducting is also just big like this, and vice versa.So just can control the conducting electric current of magnetic clutch (8) according to actual needs, thereby reach purpose of energy saving.
Claims (2)
1. energy-saving electric booster steering device magnetic clutch control method, it is characterized in that being provided with by the current-limiting resistance that is linked in sequence (3), aerotron (4), high-power V metal-oxide-semiconductor (9), pull-up resistor (5) and be connected pulse-width modulation waveform (PWM) driving circuit that diode (7) that magnetic clutch (8) two ends constitute the loop is formed magnetic clutch (8), driving circuit is controlled the electric current of magnetic clutch (8) by pulse-width modulation waveform (PWM).
2. energy-saving electric booster steering device magnetic clutch control method according to claim 1 is characterized in that micro controller system (1) the torque transmitted size dutycycle of regulating the driving circuit output drive signal as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100140874A CN100335331C (en) | 2004-02-18 | 2004-02-18 | Energy-saving control method for electro magnetic clutch of electric assisted steering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100140874A CN100335331C (en) | 2004-02-18 | 2004-02-18 | Energy-saving control method for electro magnetic clutch of electric assisted steering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1559848A CN1559848A (en) | 2005-01-05 |
| CN100335331C true CN100335331C (en) | 2007-09-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100140874A Expired - Fee Related CN100335331C (en) | 2004-02-18 | 2004-02-18 | Energy-saving control method for electro magnetic clutch of electric assisted steering device |
Country Status (1)
| Country | Link |
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| CN (1) | CN100335331C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2796343B1 (en) * | 2011-12-21 | 2016-10-05 | Nissan Motor Co., Ltd | Steering device |
| CN102840282B (en) * | 2012-08-31 | 2016-01-20 | 重庆钟华机械有限责任公司 | A kind of electric motor car two-shift automatic variable speed system |
| CN108068660B (en) * | 2017-12-18 | 2021-03-02 | 西北农林科技大学 | Control method and control system for bias steering shaft electromagnetic friction lock |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4837690A (en) * | 1986-04-22 | 1989-06-06 | Mitsubishi Denki Kabushiki Kaisha | Motor-driven power steering system for a vehicle |
| JPH01254471A (en) * | 1988-04-01 | 1989-10-11 | Koyo Seiko Co Ltd | Electromagnetic clutch control circuit for motor-driven power steering device |
| JPH0577756A (en) * | 1991-09-20 | 1993-03-30 | Mitsubishi Electric Corp | Electric power steering control device and its method |
| CN1439560A (en) * | 2003-03-26 | 2003-09-03 | 武汉理工大学 | Electromagnetic steering booster of vehicle |
-
2004
- 2004-02-18 CN CNB2004100140874A patent/CN100335331C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4837690A (en) * | 1986-04-22 | 1989-06-06 | Mitsubishi Denki Kabushiki Kaisha | Motor-driven power steering system for a vehicle |
| JPH01254471A (en) * | 1988-04-01 | 1989-10-11 | Koyo Seiko Co Ltd | Electromagnetic clutch control circuit for motor-driven power steering device |
| JPH0577756A (en) * | 1991-09-20 | 1993-03-30 | Mitsubishi Electric Corp | Electric power steering control device and its method |
| CN1439560A (en) * | 2003-03-26 | 2003-09-03 | 武汉理工大学 | Electromagnetic steering booster of vehicle |
Non-Patent Citations (3)
| Title |
|---|
| 汽车EPS动力学模型分析及控制系统设计 张钟光，青岛大学学报，第18卷第3期 2003 * |
| 汽车电子控制式电动助力转向系统的发展 冯樱等，湖北汽车工业学院学报，第15卷第1期 2001 * |
| 电动助力转向系统控制技术的研究 陈奎元等，江苏大学学报，第25卷第1期 2004 * |
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| Publication number | Publication date |
|---|---|
| CN1559848A (en) | 2005-01-05 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Changzhou Baodun Electronic Machinery Co., Ltd. Assignor: Jiangsu University Contract fulfillment period: 2007.9.25 to 2013.8.18 contract change Contract record no.: 2008320000628 Denomination of invention: Energy-saving control method for electro magnetic clutch of electric assisted steering device Granted publication date: 20070905 License type: Exclusive license Record date: 2008.10.8 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2007.9.25 TO 2013.8.18; CHANGE OF CONTRACT Name of requester: CHANGZHOU CITY BAODUN ELECTRONIC MACHINE CO., LTD. Effective date: 20081008 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070905 Termination date: 20130218 |