CN106740847A - The self adaptation of four-wheel electric motor car is with car method - Google Patents

The self adaptation of four-wheel electric motor car is with car method Download PDF

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Publication number
CN106740847A
CN106740847A CN201611195664.3A CN201611195664A CN106740847A CN 106740847 A CN106740847 A CN 106740847A CN 201611195664 A CN201611195664 A CN 201611195664A CN 106740847 A CN106740847 A CN 106740847A
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China
Prior art keywords
control device
vehicle control
speed
car
distance
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Granted
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CN201611195664.3A
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CN106740847B (en
Inventor
杨国青
聂德云
吕攀
文书槐
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JIANGSU RADISH TRANSPORTATION TECHNOLOGY Co Ltd
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JIANGSU RADISH TRANSPORTATION TECHNOLOGY Co Ltd
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Priority to CN201611195664.3A priority Critical patent/CN106740847B/en
Publication of CN106740847A publication Critical patent/CN106740847A/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/14Adaptive cruise control
    • B60W30/16Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
    • B60W30/162Speed limiting therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L15/00Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2009Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed for braking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00Input parameters relating to overall vehicle dynamics
    • B60W2520/10Longitudinal speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2554/00Input parameters relating to objects
    • B60W2554/80Spatial relation or speed relative to objects
    • B60W2554/801Lateral distance
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention provides a kind of self adaptation of four-wheel electric motor car with car method, comprise the following steps:The distance between S1, the headstock of vehicle control device detection electric motor car and front truck are E;S2, vehicle control device are compared described apart from E and safe distance threshold value F;Work as E>During F, vehicle control device improves speed;Work as E<During F, vehicle control device reduction speed;As E=F; vehicle control device keeps speed; the self adaptation of this four-wheel electric motor car is detected using double ultrasonic radars with car method to front truck; it is accurate the distance between to calculate with front truck; effectively solve other distance measuring methods and wrong report often occurs and by both sides vehicle interference problem; realized actively with car according to leading vehicle distance and speed; automatically adjust speed; safe distance is kept with front truck; and when distance is too near dangerous; stopped locking motor by electromagnetism, make electric motor car reduction of speed as early as possible, spaced out with front truck.

Description

The self adaptation of four-wheel electric motor car is with car method
Technical field
The present invention relates to vehicle technology field, more particularly to a kind of self adaptation of four-wheel electric motor car is with car method.
Background technology
The constantly soaring of car ownership has triggered a series of problems.Most of automobile burning gasoline, diesel oil, natural gas etc. Fossil fuel, the reserves of fossil fuel are limited, enormous amounts and ever-increasing automobile quantity makes energy crisis on the earth It is increasingly serious.General 1500kg of weight of orthodox car or so, payload only has 100kg or so, and most of energy waste exists In invalid load, serious energy waste is caused.In addition, orthodox car is bulky, general automobile floor space about 10 is flat Square rice, the growth of automobile quantity causes that the nervous problem of traffic congestion and parking stall is increasingly severe.Electric motor car is subject to increasingly The welcome of many consumers.Electric motor car price is lower than orthodox car, for electric motor car charge expense also than the expense of automobile fuel filler It is low;Electric motor car is flexibly compact, in Non-motorized vehicle lane running, is not generally encountered with traffic jam, is also easier to find parking stall;Electricity Motor-car does not have exhaust emissions, does not pollute the environment.
With the fast development of electric bicycle, four-wheel electric motor car is also received by increasing user.And along with The popularization of four-wheel electric motor car, often occurs the situation of traffic congestion on road, in traffic congestion section, it usually needs control car It is in following state, the distance between vehicle in following state and front vehicles (i.e. this car in the range of safe distance It is more than or equal to safe distance with the distance between front vehicles), generally control vehicle to be according to driving experience by driver Following state.Specifically, driver can judge the travel speed and Ben Che and front car of front vehicles according to driving experience The distance between, then the distance between the travel speed and Ben Che according to front vehicles and front vehicles, by control Throttle, brake of this car etc. control the distance between this car and front vehicles in the range of safe distance.But manual control Precision is relatively low, and travel safety is relatively low.
The content of the invention
The technical problem to be solved in the present invention is:In order to solve when four-wheel electric motor car is driven, artificially with the control essence of car Degree is relatively low, and driver is easily tired, the relatively low problem of travel safety, the invention provides a kind of self adaptation of four-wheel electric motor car Solved the above problems with car method.
The technical solution adopted for the present invention to solve the technical problems is:A kind of self adaptation of four-wheel electric motor car is with car side Method, comprises the following steps:
The distance between S1, the headstock of vehicle control device detection electric motor car and front truck are E;
S2, vehicle control device are compared described apart from E and safe distance threshold value F:
Work as E>During F, vehicle control device improves speed;
Work as E<During F, vehicle control device reduction speed;
As E=F, vehicle control device keeps speed.
Preferably, also including step S3, vehicle control device is compared apart from E by described with risk distance threshold value Q, when E<During Q, vehicle control device cut-out motor power, and start electromagnetism and stop, pin the output shaft of motor.
Preferably, in the step S1, the vehicle control device reads the first ultrasonic radar and the second ultrasonic wave The data of radar, wherein, first ultrasonic radar and the second ultrasonic radar are arranged on the headstock of electric motor car, described first Ultrasonic radar detect it with the front truck tailstock at one the distance between point distance measurement P be A, second ultrasonic radar detects it It is B with the distance between the point distance measurement P, the distance between first ultrasonic radar and the second ultrasonic radar are M, institute State vehicle control device acquisition and calculate described apart from E apart from A and after B, process is as follows:
Set up equation group:
Wherein, C is intersection point Rs of the point distance measurement P on the first ultrasonic radar and the second ultrasonic radar line and the first surpass The distance between sound radar, D is between the first ultrasonic radar and the midpoint O and vertical R of the second ultrasonic radar line Distance;Solve equation and obtain E QUOTE
Preferably, vehicle control device detects real-time speed v, in the step S2, work as E>During F, vehicle control device improves defeated Go out to the dutycycle of the pulse signal of electric machine controller;Work as E<During F, the pulse of vehicle control device reduction output to electric machine controller The dutycycle of signal;As E=F, current vehicle speed is designated as reference speed by vehicle control device, vehicle control device by real-time speed v with Reference speed is compared:When real-time speed v is more than reference speed, the arteries and veins of vehicle control device reduction output to electric machine controller The dutycycle of signal is rushed, when real-time speed v is less than reference speed, vehicle control device improves the pulse of output to electric machine controller The dutycycle of signal, when real-time speed v is equal to reference speed, vehicle control device keeps output to the pulse of electric machine controller to believe Number dutycycle.
Preferably, vehicle control device detects real-time speed v, in the step S3, Q=θ v, θ are the conversion system of v and Q Number.
The beneficial effects of the invention are as follows the self adaptation of this four-wheel electric motor car uses double ultrasonic radars to preceding with car method The distance between car detected, accurately calculate with front truck, effectively solve other distance measuring methods and wrong report often occurs and by two Side vehicle interference problem, realizes actively with car according to leading vehicle distance and speed, automatically adjusts speed, with front truck keep safety away from From, and when distance is too near dangerous, stopped locking motor by electromagnetism, make electric motor car reduction of speed as early as possible, spaced out with front truck.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is the flow chart of the self adaptation with the optimum embodiment of car method of four-wheel electric motor car of the invention.
Fig. 2 is the radar range finding figure of the self adaptation with car method of four-wheel electric motor car of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached It is exemplary to scheme the embodiment of description, is only used for explaining the present invention, and is not considered as limiting the invention.Conversely, this Inventive embodiment includes all changes fallen into the range of the spiritual and intension of attached claims, modification and is equal to Thing.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outward ", " axial direction ", The orientation or position relationship of the instructions such as " radial direction ", " circumference " are based on orientation shown in the drawings or position relationship, merely to just Described in the description present invention and simplifying, rather than indicate imply signified device or element must have specific orientation, with Specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating or implying relatively important Property.In the description of the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " connected ", " connection " should It is interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or is integrally connected;Can be that machinery connects Connect, or electrically connect;Can be joined directly together, it is also possible to be indirectly connected to by intermediary.It is common for this area For technical staff, above-mentioned term concrete meaning in the present invention can be understood with concrete condition.Additionally, in description of the invention In, unless otherwise indicated, " multiple " is meant that two or more.
Any process described otherwise above or method description in flow chart or herein is construed as, and expression includes It is one or more for realizing specific logical function or process the step of the module of code of executable instruction, fragment or portion Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussion suitable Sequence, including function involved by basis by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention Embodiment person of ordinary skill in the field understood.
As shown in Figure 1 and 2, comprised the following steps with car method the invention provides a kind of self adaptation of four-wheel electric motor car:
The distance between S1, the headstock of vehicle control device detection electric motor car and front truck are E;Vehicle control device reads the first ultrasonic wave The data of radar and the second ultrasonic radar, wherein, the first ultrasonic radar and the second ultrasonic radar are arranged on electric motor car Headstock, the first ultrasonic radar detect it with the front truck tailstock at one the distance between point distance measurement P be A, the second ultrasonic radar Detect that the distance between it and point distance measurement P are B, the distance between the first ultrasonic radar and the second ultrasonic radar are M, vehicle Controller is obtained and calculated apart from A and after B apart from E, and process is as follows:
Set up equation group:
Wherein, C is intersection point Rs and first ultrasonic wave of the point distance measurement P on the first ultrasonic radar and the second ultrasonic radar line The distance between radar, D is the distance between midpoint O and vertical R of the first ultrasonic radar and the second ultrasonic radar line; Solve equation and obtain E QUOTE
S2, vehicle control device will be compared apart from E and safe distance threshold value F:
Work as E>During F, vehicle control device improves speed;
Work as E<During F, vehicle control device reduction speed;
As E=F, vehicle control device keeps speed;
S3, vehicle control device will be compared apart from E with risk distance threshold value Q, work as E<During Q, vehicle control device cut-out motor electricity Source, and start electromagnetism and stop, pin the output shaft of motor.
The motor of electric motor car is brshless DC motor, carries Hall sensor, and it is connected with vehicle control device, will detect The rotating speed of rotor transmit to vehicle control device, vehicle control device can just calculate real-time speed v;In step s 2, Work as E>During F, vehicle control device improves the dutycycle of output to the pulse signal of electric machine controller;Work as E<During F, vehicle control device drop The dutycycle of pulse signal of the low output to electric machine controller;As E=F, be designated as current vehicle speed to refer to car by vehicle control device With reference speed be compared real-time speed v by speed, vehicle control device:When real-time speed v is more than reference speed, wagon control Device reduction is exported to the dutycycle of the pulse signal of electric machine controller, when real-time speed v is less than reference speed, vehicle control device The dutycycle of output to the pulse signal of electric machine controller is improved, when real-time speed v is equal to reference speed, vehicle control device is protected Hold the dutycycle of output to the pulse signal of electric machine controller.
In step s3, Q=θ v, θ are the conversion coefficient of v and Q, and real-time speed v is directly proportional to risk distance threshold value Q.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described Point is contained at least one embodiment of the invention or example.In this manual, to the schematic representation of the term not Necessarily refer to identical embodiment or example.And, the specific features of description, structure, material or feature can be any One or more embodiments or example in combine in an appropriate manner.
With above-mentioned according to desirable embodiment of the invention as enlightenment, by above-mentioned description, relevant staff is complete Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.

Claims (5)

1. a kind of self adaptation of four-wheel electric motor car is with car method, it is characterised in that comprise the following steps:
The distance between S1, the headstock of vehicle control device detection electric motor car and front truck are E;
S2, vehicle control device are compared described apart from E and safe distance threshold value F:
Work as E>During F, vehicle control device improves speed;
Work as E<During F, vehicle control device reduction speed;
As E=F, vehicle control device keeps speed.
2. the self adaptation of four-wheel electric motor car as claimed in claim 1 is with car method, it is characterised in that:Also include step S3, car Controller is compared apart from E by described with risk distance threshold value Q, works as E<During Q, vehicle control device cut-out motor power, and Start electromagnetism to stop, pin the output shaft of motor.
3. the self adaptation of four-wheel electric motor car as claimed in claim 1 is with car method, it is characterised in that:In the step S1, The vehicle control device reads the data of the first ultrasonic radar and the second ultrasonic radar, wherein, the first ultrasonic wave thunder Up to the headstock that electric motor car is arranged on the second ultrasonic radar, first ultrasonic radar detect it with the front truck tailstock at one The distance between point distance measurement P is A, and second ultrasonic radar detects that it is B the distance between with the point distance measurement P, described The distance between first ultrasonic radar and the second ultrasonic radar are M, and the vehicle control device is obtained apart from A and after B Calculate described apart from E, process is as follows:
Set up equation group:
Wherein, C is intersection point Rs of the point distance measurement P on the first ultrasonic radar and the second ultrasonic radar line and the first surpass The distance between sound radar, D is between the first ultrasonic radar and the midpoint O and vertical R of the second ultrasonic radar line Distance;Solve equation and obtain E QUOTE
4. the self adaptation of four-wheel electric motor car as claimed in claim 1 is with car method, it is characterised in that:Vehicle control device detection is real When speed v, in the step S2, work as E>During F, vehicle control device improves the duty of output to the pulse signal of electric machine controller Than;Work as E<During F, the dutycycle of vehicle control device reduction output to the pulse signal of electric machine controller;As E=F, wagon control Current vehicle speed is designated as reference speed by device, and with reference speed be compared real-time speed v by vehicle control device:As real-time speed v During more than reference speed, the dutycycle of vehicle control device reduction output to the pulse signal of electric machine controller, when real-time speed v is small When reference speed, vehicle control device improves the dutycycle of output to the pulse signal of electric machine controller, when real-time speed v is equal to During reference speed, vehicle control device keeps output to the dutycycle of the pulse signal of electric machine controller.
5. the self adaptation of four-wheel electric motor car as claimed in claim 2 is with car method, it is characterised in that:Vehicle control device detection is real When speed v, in the step S3, Q=θ v, θ are the conversion coefficient of v and Q.
CN201611195664.3A 2016-12-22 2016-12-22 The adaptive follow the bus method of four-wheel electric motor car Active CN106740847B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107351822A (en) * 2017-07-11 2017-11-17 浙江大学常州工业技术研究院 A kind of method for protecting of four-wheel electric motor car
CN107933555A (en) * 2017-11-08 2018-04-20 重庆长安汽车股份有限公司 Automobile low speed straight line cruise system and method
CN108058618A (en) * 2017-12-14 2018-05-22 阜阳裕晟电子科技有限公司 A kind of vehicular electric machine control method
CN108082008A (en) * 2017-12-14 2018-05-29 黄晓丽 A kind of motor speed control method based on vehicle
CN113815351A (en) * 2021-11-03 2021-12-21 合肥海源机械有限公司 Driving axle unmanned control system

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WO2012091637A1 (en) * 2010-12-29 2012-07-05 Volvo Lastvagnar Ab X adaptative cruise control
CN102991416A (en) * 2012-12-10 2013-03-27 常州大学 Traffic safety distance control system for automobile and method thereof
CN105644560A (en) * 2016-03-22 2016-06-08 辽宁工业大学 ACC (adaptive cruise control) system and method for four-wheel hub motor electric vehicle
CN105774807A (en) * 2016-03-04 2016-07-20 苏黎 Vehicle speed control method and vehicle
CN106114422A (en) * 2016-08-03 2016-11-16 安徽工程大学 Autonomous with car system and the control method of minimum safe following distance thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012091637A1 (en) * 2010-12-29 2012-07-05 Volvo Lastvagnar Ab X adaptative cruise control
CN102991416A (en) * 2012-12-10 2013-03-27 常州大学 Traffic safety distance control system for automobile and method thereof
CN105774807A (en) * 2016-03-04 2016-07-20 苏黎 Vehicle speed control method and vehicle
CN105644560A (en) * 2016-03-22 2016-06-08 辽宁工业大学 ACC (adaptive cruise control) system and method for four-wheel hub motor electric vehicle
CN106114422A (en) * 2016-08-03 2016-11-16 安徽工程大学 Autonomous with car system and the control method of minimum safe following distance thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107351822A (en) * 2017-07-11 2017-11-17 浙江大学常州工业技术研究院 A kind of method for protecting of four-wheel electric motor car
CN107351822B (en) * 2017-07-11 2019-10-25 浙江大学常州工业技术研究院 A kind of method for protecting of four-wheel electric motor car
CN107933555A (en) * 2017-11-08 2018-04-20 重庆长安汽车股份有限公司 Automobile low speed straight line cruise system and method
CN108058618A (en) * 2017-12-14 2018-05-22 阜阳裕晟电子科技有限公司 A kind of vehicular electric machine control method
CN108082008A (en) * 2017-12-14 2018-05-29 黄晓丽 A kind of motor speed control method based on vehicle
CN113815351A (en) * 2021-11-03 2021-12-21 合肥海源机械有限公司 Driving axle unmanned control system

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