CN102295023B - EPS (Electric Power Storage) power-assisted steering method and system suitable for pure electric vehicle automobile - Google Patents
EPS (Electric Power Storage) power-assisted steering method and system suitable for pure electric vehicle automobile Download PDFInfo
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- CN102295023B CN102295023B CN 201110164173 CN201110164173A CN102295023B CN 102295023 B CN102295023 B CN 102295023B CN 201110164173 CN201110164173 CN 201110164173 CN 201110164173 A CN201110164173 A CN 201110164173A CN 102295023 B CN102295023 B CN 102295023B
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Abstract
The invention provides an EPS (Electric Power Storage) power-assisted steering method suitable for a pure electric vehicle automobile The method comprises the following steps: (1) a finished automobile controller reads a vehicle driving motor revolving speed pulse signal, and the finished automobile controller performs conversion according to an input vehicle driving motor revolving speed pulse signal and generates a vehicle speed CAN (Controller Area Network) signal; (2) a signal conversion module converts the vehicle speed CAN signal into a vehicle speed variable frequency pulse analog signal and a motor revolving speed variable frequency pulse analog signal which are required by the EPS steering power-assisted controller; and (3) the EPS steering power-assisted controller receives an analog vehicle speed variable frequency pulse signal and the motor revolving speed variable frequency pulse signal which are sent by the signal conversion module to control the EPS steering power-assisted motor to work so as to accurately provide steering assisted power for the pure electric vehicle equipped with a single-gear speed reducer.
Description
Technical field
The invention belongs to pure electric automobile control field, particularly a kind of EPS power steering method that is applicable to the pure electric vehicle automobile.
Background technology
Automobile trends towards popularizing average family gradually as the symbol of an era civilization.Pure electric automobile leads Development of automotive technique as a class of new-energy automobile.
Present new-energy automobile uses EPS power steering scheme to have a lot, and much all there are problems such as error is bigger than normal or unreliable in schemes.And for a lot of pure electric automobiles, it changes many gears change-speed box of original automobile into the retarder of single gear, and driving engine variable-frequency pulse signal transducer and speed of a motor vehicle variable-frequency pulse signal transducer on the former multi-speed gear box have been cancelled, pure electric automobile car at this single gear retarder, existing new-energy automobile does not have EPS power steering signal source, and this is the problem that needs solution.
Summary of the invention
The present invention is directed to the problems referred to above of prior art, propose a kind of EPS power steering method that is applicable to the pure electric vehicle automobile, and a kind of EPS steering boost system further is provided, the pure electric automobile for single gear retarder provides power steering accurately.
Technical scheme of the present invention is:
A kind of EPS power steering method that is applicable to the pure electric vehicle automobile said method comprising the steps of:
(1) read vehicular drive motor speed impulse singla by entire car controller, entire car controller converts according to the vehicular drive motor speed impulse singla of importing and produces speed of a motor vehicle CAN signal;
(2) by a signal conversion module speed of a motor vehicle CAN signal is converted to EPS power steering controller needed speed of a motor vehicle variable-frequency pulse analog signal and engine speed variable-frequency pulse analog signal;
(3) receive simulation speed of a motor vehicle variable-frequency pulse signal and the engine speed variable-frequency pulse signal that signal conversion module is sent by EPS power steering controller, control EPS power steering machine operation, thus realize the Vehicular turn assist function.
In the described step (2), signal conversion module obtains the wheel speed tach signal by resolving speed of a motor vehicle CAN signal, and through the speed of a motor vehicle variable-frequency pulse analog signal and the engine speed variable-frequency pulse analog signal that convert, hardware driving generation EPS uses, concrete steps are as follows:
(1) from recognition speed of a motor vehicle CAN signal to the conversion of calculating the wheel speed tach signal:
Suppose F:001,010,011 in the CAN signal ... represent the speed of a motor vehicle CAN signal data that arranges in the module respectively, then the wheel speed tach signal is
v=w×F ①
Wherein w is conversion factor;
(2) from wheel speed tach signal v to speed of a motor vehicle variable-frequency pulse analog signal with the conversion of engine speed variable-frequency pulse analog signal:
A, engine speed variable-frequency pulse analog signal: produce a fixed value by the modular converter inner member after receiving the wheel speed tach signal, the dutycycle of this fixed value is constant to be that a ratio, level constant height are that a voltage, frequency are a constant frequency;
B, speed of a motor vehicle variable-frequency pulse analog signal: establishing speed of a motor vehicle variable-frequency pulse frequency analog signal is f; Then the pass of f and wheel speed tach signal v is:
f=m×v ②
Wherein, m is any one fixed value that wheel speed tach signal and speed of a motor vehicle variable-frequency pulse frequency analog signal convert;
Speed of a motor vehicle variable-frequency pulse analog signal is produced by formula conversion 2. by the modular converter inner member, and the dutycycle of this impulse singla is that any one constant ratio, level height are any one voltage.
The present invention further provides a kind of pure electric vehicle automobile EPS steering boost system of realizing said method, it comprises drive motor, entire car controller HCU, signal conversion module, EPS power steering controller, EPS power steering motor;
Wherein drive motor is responsible for producing the drive motor rotational speed pulse signal, is input to entire car controller HCU;
The vehicular drive motor speed impulse singla that entire car controller HCU is responsible for importing converts and produces speed of a motor vehicle CAN signal;
Signal conversion module is responsible for the CAN signal of the speed of a motor vehicle is converted to EPS power steering controller needed speed of a motor vehicle variable-frequency pulse analog signal and engine speed variable-frequency pulse analog signal;
It is size of current and the direction of control EPS power steering motor that EPS power steering controller is responsible for the speed of a motor vehicle variable-frequency pulse analog signal of input and engine speed variable-frequency pulse analog signal conversion;
EPS power steering motor is responsible for steering hardware provides power steering.
Pure electric vehicle automobile EPS power steering method and system provided by the invention is scientific and reasonable, can be accurately provides power steering for the pure electric automobile of single gear retarder.
Description of drawings
Fig. 1: the schematic diagram of pure electric vehicle automobile EPS steering boost system of the present invention.
The specific embodiment
Describe the present invention in detail below in conjunction with accompanying drawing:
Schematic diagram of the present invention the present invention relates to drive motor, entire car controller (HCU), signal conversion module, EPS power steering controller, EPS power steering motor etc. as shown in Figure 1.Wherein drive motor mainly is responsible for producing the drive motor rotational speed pulse signal, the vehicular drive motor speed impulse singla that HCU mainly is responsible for importing converts and produces speed of a motor vehicle CAN signal, signal conversion module mainly is responsible for the CAN signal of the speed of a motor vehicle is converted to EPS power steering controller needed speed of a motor vehicle variable-frequency pulse analog signal and engine speed variable-frequency pulse analog signal, it is size of current and the direction of control EPS power steering motor that EPS power steering controller mainly is responsible for the speed of a motor vehicle variable-frequency pulse analog signal of input and engine speed variable-frequency pulse analog signal conversion, and EPS power steering motor mainly is responsible for steering hardware power steering is provided.
Its boosting method is as follows:
Entire car controller by pure electric automobile reads vehicular drive motor speed impulse singla, and entire car controller converts according to the vehicular drive motor speed impulse singla of importing and produces speed of a motor vehicle CAN signal.By a signal conversion module, after speed of a motor vehicle CAN signal is converted to EPS power steering controller needed speed of a motor vehicle variable-frequency pulse analog signal and engine speed variable-frequency pulse analog signal, export to EPS power steering controller, receive control EPS power steering machine operation behind simulation speed of a motor vehicle variable-frequency pulse signal that signal conversion module sends and the engine speed variable-frequency pulse signal by EPS power steering controller, thereby realize the Vehicular turn assist function.
Wherein by a signal conversion module with the concrete grammar that speed of a motor vehicle CAN signal is converted to EPS power steering controller needed speed of a motor vehicle variable-frequency pulse analog signal and engine speed variable-frequency pulse analog signal be: signal conversion module obtains the wheel speed tach signal by resolving speed of a motor vehicle CAN signal, and through the speed of a motor vehicle variable-frequency pulse analog signal and the engine speed variable-frequency pulse analog signal that convert, hardware driving generation EPS uses, its concrete mode is as follows:
(1) from recognition speed of a motor vehicle CAN signal to the conversion of calculating the wheel speed tach signal:
Suppose F:001,010,011 in the CAN signal ... represent the speed of a motor vehicle CAN signal data that arranges in the module respectively, then the wheel speed tach signal is
v=w×F ①
Wherein w is conversion factor;
(2) from wheel speed tach signal v to speed of a motor vehicle variable-frequency pulse analog signal with the conversion of engine speed variable-frequency pulse analog signal:
A, engine speed variable-frequency pulse analog signal: produce a fixed value by the modular converter inner member after receiving the wheel speed tach signal, the dutycycle of this fixed value is constant to be that a ratio, level constant height are that a voltage, frequency are a constant frequency;
B, speed of a motor vehicle variable-frequency pulse analog signal: establishing speed of a motor vehicle variable-frequency pulse frequency analog signal is f; Then the pass of f and wheel speed tach signal v is:
f=m×v ②
Wherein, m is any one fixed value that wheel speed tach signal and speed of a motor vehicle variable-frequency pulse frequency analog signal convert;
Speed of a motor vehicle variable-frequency pulse analog signal is produced by formula conversion 2. by the modular converter inner member, and the dutycycle of this impulse singla is that any one constant ratio, level height are any one voltage.
Claims (2)
1. EPS power steering method that is applicable to the pure electric vehicle automobile is characterized in that: said method comprising the steps of:
(1) read vehicular drive motor speed impulse singla by entire car controller, entire car controller converts according to the vehicular drive motor speed impulse singla of importing and produces speed of a motor vehicle CAN signal;
(2) by a signal conversion module speed of a motor vehicle CAN signal is converted to EPS power steering controller needed speed of a motor vehicle variable-frequency pulse analog signal and motor speed variable-frequency pulse analog signal;
(3) receive speed of a motor vehicle variable-frequency pulse analog signal and the motor speed variable-frequency pulse analog signal that signal conversion module is sent by EPS power steering controller, control EPS power steering machine operation, thus realize the Vehicular turn assist function;
In the described step (2), signal conversion module obtains the wheel speed tach signal by resolving speed of a motor vehicle CAN signal, and through the speed of a motor vehicle variable-frequency pulse analog signal and the motor speed variable-frequency pulse analog signal that convert, hardware driving generation EPS uses, concrete steps are as follows:
(1) from recognition speed of a motor vehicle CAN signal to the conversion of calculating the wheel speed tach signal:
Suppose that F:001,010,011 represents the speed of a motor vehicle CAN signal data that arranges in the module respectively in the CAN signal, then the wheel speed tach signal is
v=w×F ①
Wherein w is conversion factor;
(2) from wheel speed tach signal v to speed of a motor vehicle variable-frequency pulse analog signal with the conversion of motor speed variable-frequency pulse analog signal:
A, motor speed variable-frequency pulse analog signal: produce a fixed value by the modular converter inner member after receiving the wheel speed tach signal, the dutycycle of this fixed value is constant to be that a ratio, level constant height are that a voltage, frequency are a constant frequency;
B, speed of a motor vehicle variable-frequency pulse analog signal: establishing speed of a motor vehicle variable-frequency pulse frequency analog signal is f; Then the pass of f and wheel speed tach signal v is:
f=m*v ②
Wherein, m is any one fixed value that wheel speed tach signal and speed of a motor vehicle variable-frequency pulse frequency analog signal convert; Speed of a motor vehicle variable-frequency pulse analog signal is produced by formula conversion 2. by the modular converter inner member, and the dutycycle of this impulse singla is that any one constant ratio, level height are any one voltage.
2. pure electric vehicle automobile EPS steering boost system of realizing the described method of claim 1, it comprises drive motor, entire car controller HCU, signal conversion module, EPS power steering controller, EPS power steering motor;
Wherein drive motor is responsible for producing the drive motor rotational speed pulse signal, is input to entire car controller HCU;
The vehicular drive motor speed impulse singla that entire car controller HCU is responsible for importing converts and produces speed of a motor vehicle CAN signal;
Signal conversion module is responsible for the CAN signal of the speed of a motor vehicle is converted to EPS power steering controller needed speed of a motor vehicle variable-frequency pulse analog signal and motor speed variable-frequency pulse analog signal;
It is size of current and the direction of control EPS power steering motor that EPS power steering controller is responsible for the speed of a motor vehicle variable-frequency pulse analog signal of input and motor speed variable-frequency pulse analog signal conversion;
EPS power steering motor is responsible for steering hardware provides power steering.
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| CN 201110164173 CN102295023B (en) | 2011-06-18 | 2011-06-18 | EPS (Electric Power Storage) power-assisted steering method and system suitable for pure electric vehicle automobile |
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| CN 201110164173 CN102295023B (en) | 2011-06-18 | 2011-06-18 | EPS (Electric Power Storage) power-assisted steering method and system suitable for pure electric vehicle automobile |
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Families Citing this family (4)
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| KR20140072616A (en) * | 2012-12-05 | 2014-06-13 | 현대모비스 주식회사 | Method for Controlling Electro-Mechanical Brake System Using CAN |
| CN103192877B (en) * | 2013-03-22 | 2016-03-23 | 重庆长安铃木汽车有限公司 | The speed of a motor vehicle converting system of battery-driven car EPS |
| CN108790940A (en) * | 2018-05-24 | 2018-11-13 | 北京新能源汽车股份有限公司 | Direct wheel drives turn to differential speed control method, control device, equipment and automobile |
| CN114435274A (en) * | 2022-01-19 | 2022-05-06 | 东风汽车股份有限公司 | Hard wire output conversion method for CAN bus vehicle speed |
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| JP3781653B2 (en) * | 2001-03-12 | 2006-05-31 | 株式会社ジェイテクト | Electric power steering device |
| JP4061980B2 (en) * | 2002-01-15 | 2008-03-19 | 株式会社ジェイテクト | Electric power steering device |
| CN100515815C (en) * | 2006-10-11 | 2009-07-22 | 芦晓民 | Air-conditioning motor driving system of electric car and controlling method thereof |
| CN101269669A (en) * | 2007-03-19 | 2008-09-24 | 赵明翔 | Control method for electric power-assisted steering device with steering wheel corner computation and compensation |
| CN101058319A (en) * | 2007-05-21 | 2007-10-24 | 林士云 | Electric assisting steering system based on intelligence control |
| CN101121416B (en) * | 2007-09-03 | 2010-11-17 | 奇瑞汽车股份有限公司 | Electric steering system in mixed power system |
| CN100572165C (en) * | 2008-05-22 | 2009-12-23 | 吉林大学 | The differential servo steering system that is used for wheel flutter individual drive battery-driven car |
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Application publication date: 20111228 Assignee: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. Assignor: Chongqing Changan Automobile Co.,Ltd.|CHONGQING CHANG'AN NEW ENERGY AUTOMOBILE Co.,Ltd. Contract record no.: 2018500000018 Denomination of invention: EPS (Electric Power Storage) power-assisted steering method and system suitable for pure electric vehicle automobile Granted publication date: 20130911 License type: Exclusive License Record date: 20181121 |
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Effective date of registration: 20190107 Address after: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee after: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. Address before: 400023, No. 260, Jianxin East Road, Jiangbei District, Chongqing Co-patentee before: CHONGQING CHANG'AN NEW ENERGY AUTOMOBILE Co.,Ltd. Patentee before: Chongqing Changan Automobile Co.,Ltd. |
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Address after: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee after: Deep Blue Automotive Technology Co.,Ltd. Address before: 401133 room 208, 2 house, 39 Yonghe Road, Yu Zui Town, Jiangbei District, Chongqing Patentee before: CHONGQING CHANGAN NEW ENERGY AUTOMOBILE TECHNOLOGY Co.,Ltd. |
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