CN113276687A - Active speed limit control method and system for pure electric vehicle - Google Patents
Active speed limit control method and system for pure electric vehicle Download PDFInfo
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- CN113276687A CN113276687A CN202110737486.7A CN202110737486A CN113276687A CN 113276687 A CN113276687 A CN 113276687A CN 202110737486 A CN202110737486 A CN 202110737486A CN 113276687 A CN113276687 A CN 113276687A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/10—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for automatic control superimposed on human control to limit the acceleration of the vehicle, e.g. to prevent excessive motor current
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
- B60L2240/12—Speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L2250/00—Driver interactions
- B60L2250/26—Driver interactions by pedal actuation
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention relates to the technical field of vehicle speed control, and provides an active speed limit control method of a pure electric vehicle, which comprises the following steps: s1, triggering an active speed limit request, and detecting whether the current working condition meets the entry condition of the active speed limit activation state or not based on the active speed limit request; s2, if the detection result is yes, setting a speed limit value of the active speed limit, and entering an active speed limit mode; and S3, controlling the running speed of the vehicle not to exceed the speed limit value of the active speed limit in the active speed limit mode. By taking the speed limit value of the front road section as the speed limit value of the active speed limit, the overspeed behavior of a driver can be effectively reduced, and dangerous driving and illegal fine can be reduced.
Description
Technical Field
The invention relates to the technical field of vehicle speed control, and provides a pure electric vehicle active speed limit control method and system.
Background
With the development of society, the living standard of people is improved, more and more vehicles are arranged on roads, the daily travel of each driver is closely related to the speed limit, particularly in urban road sections, the speed limit value is usually low, and the drivers can drive at an excessive speed carelessly, so that violation of regulations and fine are caused.
Disclosure of Invention
The invention provides an active speed limit control method for a pure electric vehicle, which is used for carrying out active speed limit based on the set highest driving degree.
The invention is realized in such a way that a pure electric vehicle active speed limit control method specifically comprises the following steps:
s1, triggering an active speed limit request, and detecting whether the current working condition meets the entry condition of the active speed limit activation state or not based on the active speed limit request;
s2, if the detection result is yes, setting a speed limit value of the active speed limit, and entering an active speed limit mode;
and S3, controlling the running speed of the vehicle not to exceed the speed limit value of the active speed limit in the active speed limit mode.
Further, the adjustment of the speed limit value of the active speed limit comprises the following steps: increasing the speed limit value of the active speed limit and reducing the speed limit value of the active speed limit, wherein the method for increasing the speed limit value of the active speed limit specifically comprises the following steps:
the dial key is dialed up, the holding time is lower than the set time, the speed limit value of the active speed limit is increased by a first set value,
and (4) dialing up the dial key, and increasing the speed limit value of the active speed limit by a second set value when the maintaining time reaches the set time, wherein the second set value is greater than the first set value.
Further, the method for reducing the speed limit value of the active speed limit specifically comprises the following steps:
the dial key is dialed down, the maintaining time is lower than the set time, the speed limit value of the active speed limit is reduced by a first set value,
and (4) dialing down the dial key, and reducing the speed limit value of the active speed limit by a second set value when the maintaining time reaches the set time, wherein the second set value is greater than the first set value.
Further, the method for generating the active speed limit request specifically includes:
if the trigger maintaining time of the active switch reaches the set time, the speed limiting state is entered, and if the dial key is dialed down in the speed limiting state, an active speed limiting request is sent.
Further, the entry conditions of the active speed limit activation state are specifically as follows:
(1) the whole vehicle is in a pre-speed limiting state;
(2) the driving gear is a D gear;
(3) the current running speed of the vehicle is lower than the upper threshold value of the speed limit and higher than the lower threshold value of the speed limit.
Further, after entering the active speed-limiting mode, the existence of the overtaking intention is detected, and if the overtaking intention exists, the active speed-limiting mode is temporarily exited, and the overtaking mode is entered.
Further, in the overtaking mode, if any one of the following conditions is met, the overspeed mode is exited, and the active speed limiting mode is entered:
(1) after an accelerator pedal is lower than 93 percent (TBD) and the current vehicle speed is lower than the speed limit value of the active speed limit by 5km/h, re-entering the active speed limit mode;
(2) and in the overtaking mode, detecting the dial key to dial up or dial down, re-entering the active speed limiting mode after the current vehicle speed is lower than the speed limiting value of the active speed limiting by 5km/h, and updating the speed limiting value of the active speed limiting.
The invention is realized in this way, a pure electric vehicle initiative speed limit control system, the said system includes:
the main switch and the dial key are in communication connection with a vehicle control unit VCU, the vehicle control unit VCU is in communication connection with a motor controller MCU and an instrument ICM, and the vehicle control unit VCU carries out active speed limiting on the vehicle based on the active speed limiting control method of the pure electric vehicle.
According to the invention, the speed limit value of the front road section is taken as the speed limit value of the active speed limit, so that the overspeed behavior of a driver can be effectively reduced, and dangerous driving and illegal fine can be reduced; in the speed limiting mode, the speed of the vehicle is increased when the vehicle is accelerated to be close to the speed limit, and the overtaking action can be realized through related operations when the overtaking requirement exists.
Drawings
Fig. 1 is a flowchart of an active speed limit control method for a pure electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an active speed-limiting control system of a pure electric vehicle according to an embodiment of the present invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
Fig. 1 is a flowchart of an active speed limit control method for a pure electric vehicle according to an embodiment of the present invention, where the method specifically includes the following steps:
s1, triggering an active speed limit request, and detecting whether the current working condition meets the entry condition of the active speed limit activation state or not based on the active speed limit request;
in the embodiment of the present invention, the generation process of the active speed limit request is specifically as follows:
triggering an active speed limit request based on an active switch, if the trigger maintaining time of the active switch is lower than the set time (3s), performing a constant speed cruise mode, if the trigger maintaining time of the active switch reaches the set time, entering a pre-speed limit state, and if a dial key is dialed down in the pre-speed limit state, sending the active speed limit request. At the moment, whether the vehicle currently meets the entering physical examination of the active speed limit activation state is detected based on the active speed limit request, wherein the entering conditions of the active speed limit activation state are as follows:
(1) the whole vehicle is in a pre-speed limiting state;
(2) the driving gear is a D gear;
(3) the current running speed of the vehicle is lower than an upper speed limit threshold (130km/h, TBD) and higher than a lower speed limit threshold;
and if the condition that the vehicle simultaneously meets the conditions (1) to (3) is detected, entering an active speed limit activation state based on the active speed limit request.
Certainly, after the vehicle enters the pre-speed-limiting state, the vehicle owner returns to the normal driving mode, the vehicle owner can realize the purpose by triggering the active switch again, if the vehicle owner wants to enter the active speed-limiting mode, the dial key is dialed down, and whether the entering condition of the active speed-limiting activation state is met or not is automatically detected.
S2, if the detection result is yes, setting a speed limit value of the active speed limit, and entering an active speed limit mode; if the detection result is negative, returning to the step S1;
if the current working condition of the vehicle is detected to meet the activation condition of the active speed limiting state, the active speed limiting state of the vehicle is activated, and the speed limiting value of the active speed limiting is set, the invention introduces the speed limiting value setting method of the active speed limiting in detail:
the speed limit value of the active speed limit is increased by dialing up the dial key, and the adjusting mode comprises the following steps: the short plus and the long plus are used, the increase range of the speed limit value of the active speed limit corresponding to the short plus is small, and the method can be understood as fine tuning, and the specific setting method is as follows:
when the dial key is dialed up and the maintaining time is less than the set time (0.5s), the speed limit value of the active speed limit is increased by a first set value, for example, the first set value is set to be 2 km/h;
the increasing range of the speed limit value of the active speed limit corresponding to the long-distance sum is large, when the current speed limit value of the active speed limit is far away from the speed limit value of the target active speed limit, in order to facilitate the setting of the speed limit value of the active speed limit, the speed limit value of the active speed limit is increased in a continuous adjusting mode, and frequent touch of a toggle key is avoided, and the specific setting method is as follows:
and (4) dialing up the dial key, and increasing the speed limit value of the active speed limit by a second set value when the maintaining time reaches the set time (0.5s), wherein the second set value is greater than the first set value.
If the second set value is set to 5km/h, because the speed limit value of the road section is generally a whole ten or a whole hundred of numerical value, when the key is dialed for the first time and the maintaining time reaches the set time, if the current speed limit value of the active speed limit is not a multiple of 5, the speed limit value of the active speed limit is adjusted to be a 5-fold numerical value nearest to the current speed limit value, if the current speed limit value of the active speed limit is a multiple of 5, the current speed limit value of the active speed limit is increased by 5km/h, and then, when the dialing time on the key is maintained for the set time, the current speed limit value of the active speed limit is increased by 5 km/h.
Please note that the speed limit value of the active speed limit cannot exceed the upper limit threshold (130 km/h);
the speed limit value of the active speed limit is reduced by dialing down the dial key, and the adjusting mode comprises the following steps: the method comprises the following specific steps of short reduction and long reduction, wherein the reduction range of the speed limit value of the active speed limit corresponding to the short reduction is small, and can be understood as fine adjustment:
when the dial key is dialed down and the maintaining time is less than the set time (0.5s), reducing the speed limit value of the active speed limit by a first set value, for example, setting the first set value to be 2 km/h;
the reduction range of the speed limit value of the active speed limit corresponding to the length reduction is large, when the current speed limit value of the active speed limit is far away from the speed limit value of the target active speed limit, in order to facilitate the setting of the speed limit value of the active speed limit, the speed limit value of the active speed limit is reduced in a continuous adjusting mode, and frequent touch of a toggle key is avoided, and the specific setting method is as follows:
if the dial key is dialed down and the maintaining time reaches the set time (0.5s), the speed limit value of the active speed limit is reduced by a second set value, and the second set value is larger than the first set value.
If the second set value is set to 5km/h, because the speed limit value of the road section is generally a whole ten or a whole hundred of numerical value, when the key is dialed down for the first time and the holding time reaches the set time, if the current speed limit value of the active speed limit is not a multiple of 5, the speed limit value of the active speed limit is adjusted to be a 5-fold numerical value nearest to the current speed limit value, if the current speed limit value of the active speed limit is a multiple of 5, the current speed limit value of the active speed limit is increased by 5km/h, and then, when the key is dialed down for each holding time of the set time, the current speed limit value of the active speed limit is decreased by 5 km/h.
Note that the speed limit value of the active speed limit cannot be lower than the lower speed limit threshold (30 km/h).
And S3, the vehicle running speed in the active speed limiting mode does not exceed the speed limiting value of the active speed limiting.
In the embodiment of the invention, the vehicle running speed is controlled based on the opening degree of the accelerator pedal, and when the vehicle running speed reaches the speed limit value of the active speed limit, if the opening degree of the accelerator pedal is continuously increased, the vehicle running speed at the moment is regarded as the speed limit value of the active speed limit.
In the active speed limiting mode, a overtaking demand may occur, and the overtaking intention detection method specifically comprises the following steps:
(1) in an active speed limit activation state;
(2) the current speed reaches the speed limit value of the active speed limit;
(3) the opening degree of an accelerator pedal exceeds 95 percent (TBD), and the maintaining time t is more than or equal to 1 s;
if the conditions (1) to (3) are simultaneously met, determining that the overtaking intention exists, after the overtaking intention is detected, temporarily exiting the active speed-limiting mode, entering the overtaking mode, controlling the vehicle running speed based on the opening degree of an accelerator pedal in the overtaking mode, and exiting the overspeed mode and entering the active speed-limiting mode again under the following conditions:
(1) after an accelerator pedal is lower than 93 percent (TBD) and the current vehicle speed is lower than the speed limit value of the active speed limit by 5km/h, re-entering the active speed limit mode;
(2) and in the overtaking mode, detecting the dial key to dial up or dial down, re-entering the active speed limiting mode after the current vehicle speed is lower than the speed limiting value of the active speed limiting by 5km/h, and updating the speed limiting value of the active speed limiting.
In another embodiment of the invention, when the vehicle is in the speed limiting mode, the active speed limiting mode is exited based on the triggering operation of the main switch, or the active speed limiting mode is exited when the whole vehicle is powered off.
Fig. 2 is a schematic structural diagram of an active speed-limiting control system of a pure electric vehicle according to an embodiment of the present invention, and for convenience of description, only a part related to the embodiment of the present invention is shown, where the system includes:
the main switch and the dial key are in communication connection with a vehicle control unit VCU, the vehicle control unit VCU is in communication connection with a motor controller MCU and an instrument ICM, and the vehicle control unit VCU carries out active speed limiting on the vehicle based on the active speed limiting control method of the pure electric vehicle.
According to the invention, the speed limit value of the front road section is taken as the speed limit value of the active speed limit, so that the overspeed behavior of a driver can be effectively reduced, and dangerous driving and illegal fine can be reduced; in the speed limiting mode, the speed of the vehicle is increased when the vehicle is accelerated to be close to the speed limit, and the overtaking action can be realized through related operations when the overtaking requirement exists.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (8)
1. The active speed limit control method of the pure electric vehicle is characterized by comprising the following steps:
s1, triggering an active speed limit request, and detecting whether the current working condition meets the entry condition of the active speed limit activation state or not based on the active speed limit request;
s2, if the detection result is yes, setting a speed limit value of the active speed limit, and entering an active speed limit mode;
and S3, controlling the running speed of the vehicle not to exceed the speed limit value of the active speed limit in the active speed limit mode.
2. The active speed limit control method of the pure electric vehicle as claimed in claim 1, wherein the adjustment of the speed limit value of the active speed limit comprises: increasing the speed limit value of the active speed limit and reducing the speed limit value of the active speed limit, wherein the method for increasing the speed limit value of the active speed limit specifically comprises the following steps:
the dial key is dialed up, the holding time is lower than the set time, the speed limit value of the active speed limit is increased by a first set value,
and (4) dialing up the dial key, and increasing the speed limit value of the active speed limit by a second set value when the maintaining time reaches the set time, wherein the second set value is greater than the first set value.
3. The active speed limit control method of the pure electric vehicle as claimed in claim 2, wherein the method for reducing the speed limit value of the active speed limit is as follows:
the dial key is dialed down, the maintaining time is lower than the set time, the speed limit value of the active speed limit is reduced by a first set value,
and (4) dialing down the dial key, and reducing the speed limit value of the active speed limit by a second set value when the maintaining time reaches the set time, wherein the second set value is greater than the first set value.
4. The active speed limit control method of the pure electric vehicle as claimed in claim 1, wherein the active speed limit request is generated by the following specific method:
if the trigger maintaining time of the active switch reaches the set time, the speed limiting state is entered, and if the dial key is dialed down in the speed limiting state, an active speed limiting request is sent.
5. The active speed limit control method of the pure electric vehicle as claimed in claim 1, wherein the entry conditions of the active speed limit activation state are as follows:
(1) the whole vehicle is in a pre-speed limiting state;
(2) the driving gear is a D gear;
(3) the current running speed of the vehicle is lower than the upper threshold value of the speed limit and higher than the lower threshold value of the speed limit.
6. The active speed-limiting control method of pure electric vehicles according to claim 1, characterized in that after entering the active speed-limiting mode, the existence of the overtaking intention is detected, if so, the active speed-limiting mode is temporarily exited, and the overtaking mode is entered.
7. The active speed limit control method of the pure electric vehicle as claimed in claim 6, wherein in the overtaking mode, if any one of the following conditions is met, the overspeed mode is exited, and the active speed limit mode is entered:
(1) after the accelerator pedal is lower than 93% and the current vehicle speed is lower than the speed limit value of the active speed limit by 5km/h, re-entering the active speed limit mode;
(2) and in the overtaking mode, detecting the dial key to dial up or dial down, re-entering the active speed limiting mode after the current vehicle speed is lower than the speed limiting value of the active speed limiting by 5km/h, and updating the speed limiting value of the active speed limiting.
8. The active speed-limiting control system of the pure electric vehicle is characterized by comprising the following components:
the main switch and the dial key are in communication connection with a vehicle control unit VCU, the vehicle control unit VCU is in communication connection with a motor controller MCU and an instrument ICM, and the vehicle control unit VCU carries out active speed limiting on the pure electric vehicle based on the active speed limiting control method of the pure electric vehicle as claimed in any one of claims 1 to 7.
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| CN108749991A (en) * | 2018-07-05 | 2018-11-06 | 合肥移顺信息技术有限公司 | A kind of electric vehicle speed limiting device and electric vehicle method for limiting speed |
| CN111038275A (en) * | 2018-10-11 | 2020-04-21 | 郑州宇通客车股份有限公司 | Control method and device for limiting overspeed of pure electric vehicle |
| CN109849664A (en) * | 2019-03-25 | 2019-06-07 | 奇瑞汽车股份有限公司 | Limiting vehicle speed method, speed-limiting device for vehicles and computer readable storage medium |
| CN110001413A (en) * | 2019-04-19 | 2019-07-12 | 天津易众腾动力技术有限公司 | A variety of speed limit mode control methods in vehicle control unit of electric vehicle |
| CN111137138A (en) * | 2019-09-12 | 2020-05-12 | 苏州奥易克斯汽车电子有限公司 | Electric automobile speed limit control method |
| CN112590550A (en) * | 2020-12-28 | 2021-04-02 | 中通客车控股股份有限公司 | Fuzzy processing control method and system for limiting maximum speed of pure electric passenger car |
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