CN109774784A - A kind of electric vehicle and its steering system and steering system control method - Google Patents
A kind of electric vehicle and its steering system and steering system control method Download PDFInfo
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- CN109774784A CN109774784A CN201711124333.5A CN201711124333A CN109774784A CN 109774784 A CN109774784 A CN 109774784A CN 201711124333 A CN201711124333 A CN 201711124333A CN 109774784 A CN109774784 A CN 109774784A
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- 239000002699 waste material Substances 0.000 abstract description 7
- 238000004891 communication Methods 0.000 description 9
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Abstract
The present invention provides a kind of electric vehicle and its steering system and steering system control method, and after control method includes the following steps: vehicle launch, whether detection vehicle has gear signal and speed signal；If the speed of vehicle is zero, and vehicle does not have gear signal or gear is neutral gear, then controlling frequency converter not is steering motor power supply, controls frequency converter otherwise as steering motor power supply.Technical solution provided by the present invention, after vehicle launch, frequency converter is controlled when having gear signal or Vehicle Speed to be not zero as steering motor power supply, it is not steering motor power supply that frequency converter is controlled when not having the speed of gear signal and vehicle to be zero, to reduce the waste to vehicle energy, the course continuation mileage of vehicle is improved.
Description
Technical field
The invention belongs to electric vehicle steering system control technology fields, and in particular to a kind of electric vehicle and its steering system
System and steering system control method.
Background technique
Since the sole mass of electric vehicle is bigger, so the steering system on electric vehicle is generally used electronics liquid
Servo steering system is pressed, principle is the power generated using motor, assists Vehicular turn.
Electronic hydraulic power-assisted steering system used by electric vehicle is as shown in Figure 1, including frequency converter, steering motor, turning
To controller, rotation direction sensor and hydraulic steering.The starting that the enable end of frequency converter connects vehicle with steering controller is opened
It closes, when vehicle is when starting switch closure, steering controller receives enabling signal, while the enable end of frequency converter receives letter
Number.After the enable end of frequency converter receives signal, frequency converter is started to work, and the high voltage direct current that power battery is provided is converted into
Three-phase alternating current, and three-phase alternating current is conveyed to steering motor；Steering motor is started to work after receiving three-phase alternating current,
Power is provided for hydraulic steering.The steering angle of rotation direction sensor real-time detection vehicle is simultaneously sent to steering controller, turns
To controller according to the steering angle of vehicle, the working condition of motor is controlled.
In steering system shown in FIG. 1, since starting switch for vehicle is directly connected to the enable end of frequency converter, as long as so
Vehicle launch, frequency converter will work, and are three-phase alternating current by the DC inverter of power battery, power for steering motor.But
Be if vehicle only start without travel, i.e., after vehicle launch be in neutral gear when, frequency converter also can normal operating conditions, so just
The waste for causing vehicle energy reduces the course continuation mileage of vehicle.
Summary of the invention
The purpose of the present invention is to provide a kind of electric vehicle and its steering systems and steering system control method, for solving
The certainly energy waste problem under non-driving state after vehicle start-up in the prior art.
To achieve the above object, present invention provide the technical scheme that
Control program 1: a kind of electric vehicle steering system control method includes the following steps:
After vehicle launch, whether detection vehicle has gear signal and speed signal；
If the speed of vehicle is zero, and it is neutral gear that vehicle, which does not have gear signal or gear, then controlling frequency converter is not
Otherwise steering motor power supply controls frequency converter as steering motor power supply.
Technical solution provided by the present invention, after vehicle launch, control frequency converter is steering motor when having gear signal
Control frequency converter is not steering motor power supply when the speed of power supply, no gear signal and vehicle is zero, to reduce to vehicle
The waste of the energy improves the course continuation mileage of vehicle.
Control program 2: on the basis of control program 1, when frequency converter is that steering motor is powered, if automobile gear level is believed
It number disappears and the travel speed of vehicle becomes 0, then after setting time, control frequency converter stops being that steering motor is powered.
When the speed of vehicle is 0 and does not have turn signal, it is likely to be at the shift stage, so not controlling frequency converter at once
Work, so that the driving experience of driver will not be influenced because of power steering disappearance at once when carrying out gear switch.
Control program 3: on the basis of control program 3, the setting time is not less than 30s.
System schema 1: the DC side of a kind of electric vehicle steering system, including frequency converter and steering motor, frequency converter is used
In connection power battery, exchange side connects steering motor；It further include controller, vehicle speed detector device and gear signal detection dress
It sets；Gear signal detection device is used to detect the gear signal of vehicle, and vehicle speed detector device is used to detect the travel speed of vehicle,
The signal output end of inverter controller connection the gear signal detection device and vehicle speed detector device；
The frequency converter is equipped with enable end, and controller connects the enable end of frequency converter, and the controller is used for: when vehicle
Speed is zero, and vehicle does not have gear signal or gear when being neutral gear, does not send enable signal to the enable end of frequency converter, no
Then enable signal is sent to the enable end of frequency converter；
When frequency converter receives enable signal, frequency converter is steering motor power supply, and otherwise frequency converter is not steering motor
Power supply.
System schema 2: further including steering controller on the basis of system schema 1, steering controller connects steering motor
Control terminal.
System schema 3: further including rotation direction sensor, rotation direction sensor is for detecting vehicle on the basis of system schema 2
Steering angle；The signal output end of the steering controller connection rotation direction sensor.
System schema 4: further including start and stop detection device, for vehicle to be arranged on the basis of system schema 2 or 3
Place is started switch, the start stop signal of vehicle is detected；The signal output end of the steering controller connection start and stop detection device.
System schema 5: on the basis of system schema 1 or 2, the gear signal detection device is communication device, this is logical
Interrogate the gear controller that device is used for communication connection vehicle.
Vehicle scheme 1: a kind of electric vehicle, including steering system, steering system include frequency converter and steering motor, frequency conversion
The DC side of device connects steering motor for connecting power battery, exchange side；It further include controller, vehicle speed detector device and gear
Signal supervisory instrument；Gear signal detection device is used to detect the gear signal of vehicle, and vehicle speed detector device is for detecting vehicle
Travel speed, the signal output end of the inverter controller connection gear signal detection device and vehicle speed detector device；
The frequency converter is equipped with enable end, and controller connects the enable end of frequency converter, and the controller is used for: when vehicle
Speed is zero, and vehicle does not have gear signal or gear when being neutral gear, does not send enable signal to the enable end of frequency converter, no
Then enable signal is sent to the enable end of frequency converter；
When frequency converter receives enable signal, frequency converter is steering motor power supply, and otherwise frequency converter is not steering motor
Power supply.
Vehicle scheme 2: further including steering controller on the basis of vehicle scheme 1, steering controller connects steering motor
Control terminal.
Vehicle scheme 3: further including rotation direction sensor, rotation direction sensor is for detecting vehicle on the basis of vehicle scheme 2
Steering angle；The signal output end of the steering controller connection rotation direction sensor.
Vehicle scheme 4: further including start and stop detection device, for vehicle to be arranged on the basis of vehicle scheme 2 or 3
Place is started switch, the start stop signal of vehicle is detected；The signal output end of the steering controller connection start and stop detection device.
Vehicle scheme 5: on the basis of vehicle scheme 3, the gear signal detection device is communication device, communication dress
Set the gear controller for communication connection vehicle.
Vehicle scheme 6: on the basis of vehicle scheme 1 or 2, the controller is entire car controller.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of steering system in the prior art；
Fig. 2 is the structural schematic diagram of steering system in vehicle embodiments；
Fig. 3 is the control flow chart of steering system in vehicle embodiments.
Specific embodiment
The purpose of the present invention is to provide a kind of electric vehicle and its steering systems and steering system control method, for solving
The certainly energy waste problem under non-driving state after vehicle start-up in the prior art.
To achieve the above object, present invention provide the technical scheme that
A kind of electric vehicle steering system control method, includes the following steps:
After vehicle launch, whether detection vehicle has gear signal and speed signal；
If the speed of vehicle is zero, and it is neutral gear that vehicle, which does not have gear signal or gear, then controlling frequency converter is not
Otherwise steering motor power supply controls frequency converter as steering motor power supply.
Technical solution provided by the present invention, after vehicle launch, control frequency converter is steering motor when having gear signal
Power supply, it is not steering motor power supply that frequency converter is controlled when no gear signal or speed are not zero, to reduce to vehicle energy
Waste, improve the course continuation mileage of vehicle.
Technical solution of the present invention is described further With reference to embodiment.
Vehicle embodiments:
The present embodiment provides a kind of electric vehicle, the steering system of the electric vehicle uses resistance hydraulic power steering system
System.
Electric vehicle in the present embodiment, the structure of steering system is as shown in Fig. 2, include frequency converter, controller, steering
Motor, rotation direction sensor, steering controller and fluid-link steering equipment.
The power battery of the DC side connection vehicle of frequency converter, exchange side connect steering motor, and frequency converter is by power battery
DC inverter at being conveyed to steering motor after three-phase alternating current；Steering motor is connect with fluid-link steering equipment, is hydraulic rotation
Power is provided to equipment；Frequency converter is equipped with enable end, and controller connects the enable end of frequency converter, enabled by sending to frequency converter
Signal controls the working condition of frequency converter.
Steering controller connects the signal output end of rotation direction sensor, and rotation direction sensor detects the steering angle of vehicle, and
The data that the data transmission that will test is detected to steering controller, steering controller according to rotation direction sensor, it is electric to turning to
Machine is controlled.
Steering controller and vehicle start switch connection, and when vehicle launch switch motion, steering controller can be examined
Measure corresponding action signal.
Controller is equipped with communication interface, by the gear controller communication connection of the communication interface and vehicle, from gear control
Device processed receives the gear signal of vehicle.
Controller is also connected with speed detector, and speed detector is used to detect the travel speed of vehicle, and by vehicle
Travel speed be sent to controller.
Controller is also connect with starting switch for vehicle, by detecting the movement started switch, judges to open locating for vehicle
Stop state.
The step of electric vehicle provided by the present embodiment, controller controls wheel steering system as shown in figure 3,
The specific method is as follows:
When the start stop switch of vehicle is pressed, frequency converter and controller detect the action signal, are judged as vehicle
Into starting state；
When speed detector real-time detection vehicle speed signal and be sent to controller, while controller is also from gear
The gear signal of vehicle is obtained at controller；
When controller detects that the travel speed of vehicle is 0 by speed detector, and gear controller is not from vehicle
Gear controller at receive gear signal, or when receiving vehicle and being in neutral gear, controller does not make to frequency converter
It can end transmission enable signal；
Since the enable end of frequency converter is not received by enable signal, so frequency converter will not start to work, i.e. frequency converter
It will not power for steering motor, so as to avoid the waste of the energy；
When controller detects that the travel speed of vehicle is not 0 by speed detector, or from the gear of vehicle
When to receive the gear signal of vehicle and gear signal at controller be not neutral gear, controller is sent to the enable end of frequency converter to be made
It can signal；
Frequency converter is started to work after receiving enable signal, is powered for steering motor；
Steering motor obtain it is electric after start to work, provide power for fluid-link steering equipment；Rotation direction sensor real-time detection vehicle
Steering angle signal, and the angle signal of vehicle is sent to steering controller, steering controller is believed according to the angle of vehicle
Number and demand steering angle, calculate need steering motor provide power and steering motor is controlled.
In the normal course of operation of vehicle, speed detector detects that the speed of vehicle becomes 0, and vehicle does not have shelves
Position signal or gear signal be neutral gear when, since vehicle is likely to be in shift process, thus controller will not cancel immediately to
Frequency converter sends enable signal, but cancels after waiting setting times to frequency converter and send enable signal, so that shelves will not be being carried out
Because power steering disappears and is that driver brings bad driving experience when the switching of position.
Setting time in the present embodiment is 30s, and as other embodiments, setting time can be according to actual demand
It is adjusted.
In the present embodiment, using communication device as the gear signal detection device for obtaining vehicle accelerator signal；As it
His embodiment can detect the gear controller of vehicle using other devices, to obtain the gear signal of vehicle.
In the present embodiment, controller is using individual controller；As other embodiments, vehicle control can be used
Device processed is as the controller for controlling frequency converter.
System embodiment:
The present embodiment provides a kind of electric vehicle steering systems, with the electric vehicle steering system in above-mentioned vehicle embodiments
Identical, which is discussed in detail in vehicle embodiments, seldom explains here.
Embodiment of the method:
The present embodiment provides a kind of electric vehicle steering system control methods, with the electric electric vehicle in above-mentioned vehicle embodiments
Steering system control method is identical, which is discussed in detail in vehicle embodiments, seldom says here
It is bright.
Claims (10)
1. a kind of electric vehicle steering system control method, which comprises the steps of:
After vehicle launch, whether detection vehicle has gear signal and speed signal；
If the speed of vehicle is zero, and it is neutral gear that vehicle, which does not have gear signal or gear, then controlling frequency converter is not steering
Otherwise motor power supply controls frequency converter as steering motor power supply.
2. a kind of electric vehicle steering system control method according to claim 1, which is characterized in that when frequency converter is to turn
When powering to motor, if vehicle accelerator signal disappears and the travel speed of vehicle becomes 0, after setting time, frequency conversion is controlled
Device stops being that steering motor is powered.
3. a kind of electric vehicle steering system control method according to claim 2, which is characterized in that the setting time
Not less than 30s.
4. a kind of electric vehicle steering system, including frequency converter and steering motor, the DC side of frequency converter is for connecting power electric
Pond, exchange side connect steering motor；It is characterized in that, further including controller, vehicle speed detector device and gear signal detection device；
Gear signal detection device is used to detect the gear signal of vehicle, and vehicle speed detector device is used to detect the travel speed of vehicle, institute
State the signal output end of inverter controller connection gear signal detection device and vehicle speed detector device；
The frequency converter is equipped with enable end, and controller connects the enable end of frequency converter, and the controller is used for: when the speed of vehicle
Be zero, and vehicle does not have gear signal or gear when being neutral gear, does not send enable signal to the enable end of frequency converter, otherwise to
The enable end of frequency converter sends enable signal；
When frequency converter receives enable signal, frequency converter is steering motor power supply, and otherwise frequency converter is not steering motor power supply.
5. a kind of electric vehicle steering system according to claim 4, which is characterized in that further include steering controller, turn
To the control terminal of controller connection steering motor.
6. a kind of electric vehicle steering system according to claim 5, which is characterized in that further include rotation direction sensor, turn
It is used to detect the steering angle of vehicle to sensor；The signal output end of the steering controller connection rotation direction sensor.
7. a kind of electric vehicle, including steering system, steering system includes frequency converter and steering motor, and the DC side of frequency converter is used
In connection power battery, exchange side connects steering motor；It is characterized in that, further including controller, vehicle speed detector device and gear
Signal supervisory instrument；Gear signal detection device is used to detect the gear signal of vehicle, and vehicle speed detector device is for detecting vehicle
Travel speed, the signal output end of the inverter controller connection gear signal detection device and vehicle speed detector device；
The frequency converter is equipped with enable end, and controller connects the enable end of frequency converter, and the controller is used for: when the speed of vehicle
Be zero, and vehicle does not have gear signal or gear when being neutral gear, does not send enable signal to the enable end of frequency converter, otherwise to
The enable end of frequency converter sends enable signal；
When frequency converter receives enable signal, frequency converter is steering motor power supply, and otherwise frequency converter is not steering motor power supply.
8. a kind of electric vehicle according to claim 7, which is characterized in that further include steering controller, steering controller
Connect the control terminal of steering motor.
9. a kind of electric vehicle according to claim 8, which is characterized in that further include rotation direction sensor, rotation direction sensor
For detecting the steering angle of vehicle；The signal output end of the steering controller connection rotation direction sensor.
10. a kind of electric vehicle according to claim 8 or claim 9, which is characterized in that further include start and stop detection device, be used for
Vehicle is arranged in starts switch place, detects the start stop signal of vehicle；The letter of the steering controller connection start and stop detection device
Number output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711124333.5A CN109774784A (en) | 2017-11-14 | 2017-11-14 | A kind of electric vehicle and its steering system and steering system control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711124333.5A CN109774784A (en) | 2017-11-14 | 2017-11-14 | A kind of electric vehicle and its steering system and steering system control method |
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| CN109774784A true CN109774784A (en) | 2019-05-21 |
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| CN201711124333.5A Pending CN109774784A (en) | 2017-11-14 | 2017-11-14 | A kind of electric vehicle and its steering system and steering system control method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101209682A (en) * | 2006-12-26 | 2008-07-02 | 比亚迪股份有限公司 | Electric motor outputting torque moment control system and control method in electric automobile ascending condition |
| CN103552600A (en) * | 2013-11-15 | 2014-02-05 | 东风襄阳旅行车有限公司 | Electromobile power-driven hydraulic power steering control system and method |
| US20160332664A1 (en) * | 2014-01-03 | 2016-11-17 | Thomson Power Inc. | Electric vehicle power steering pump control system |
| CN106314531A (en) * | 2015-07-05 | 2017-01-11 | 深圳市沃特玛电池有限公司 | Energy-saving control method of electro-hydraulic power steering pump |
-
2017
- 2017-11-14 CN CN201711124333.5A patent/CN109774784A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101209682A (en) * | 2006-12-26 | 2008-07-02 | 比亚迪股份有限公司 | Electric motor outputting torque moment control system and control method in electric automobile ascending condition |
| CN103552600A (en) * | 2013-11-15 | 2014-02-05 | 东风襄阳旅行车有限公司 | Electromobile power-driven hydraulic power steering control system and method |
| US20160332664A1 (en) * | 2014-01-03 | 2016-11-17 | Thomson Power Inc. | Electric vehicle power steering pump control system |
| CN106314531A (en) * | 2015-07-05 | 2017-01-11 | 深圳市沃特玛电池有限公司 | Energy-saving control method of electro-hydraulic power steering pump |
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Application publication date: 20190521 |
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