CN108556846B - Control method and control system for recovering braking and sliding energy of vehicle - Google Patents
Control method and control system for recovering braking and sliding energy of vehicle Download PDFInfo
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- CN108556846B CN108556846B CN201711440703.6A CN201711440703A CN108556846B CN 108556846 B CN108556846 B CN 108556846B CN 201711440703 A CN201711440703 A CN 201711440703A CN 108556846 B CN108556846 B CN 108556846B
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- vehicle
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- energy recovery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W30/00—Purposes 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, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18072—Coasting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT 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
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
- B60W40/04—Traffic conditions
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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
Abstract
The invention belongs to the technical field of vehicle control, and particularly relates to a control method and a control system for recovering vehicle braking and sliding energy. The invention relates to a control method for recovering braking and sliding energy of a vehicle, which comprises the following steps; completely releasing an accelerator pedal of the vehicle; detecting a distance value between the vehicle and a front vehicle through a detection system; calculating a minimum vehicle speed value for performing braking and sliding energy recovery under the current distance between the vehicle and the front vehicle; judging whether the real-time speed of the vehicle is greater than the minimum speed value of the vehicle for braking and sliding energy recovery; and if the real-time speed of the vehicle is greater than the minimum speed value of the vehicle for performing braking and coasting energy recovery, performing braking and coasting energy recovery on the vehicle. By using the control method and the control system, blindness of artificial decision and energy waste can be avoided, intelligent recovery of braking and sliding energy is realized, and the economy and the intelligence of the whole vehicle are improved.
Description
Technical Field
The invention belongs to the technical field of vehicle control, and particularly relates to a control method and a control system for recovering vehicle braking and sliding energy.
Background
The current braking sliding energy recovery strategy of the intelligent driving vehicle is generally controlled based on the intention of a driver, and when the driver encounters a red light or other road conditions in a city, the driver completely releases an accelerator pedal to keep the vehicle sliding. The sliding inertia of the whole vehicle is utilized to drive the generator to generate electricity, so that the sliding energy is recovered and stored in the power battery to be used for driving the vehicle, or the whole vehicle is used for the next starting of the whole vehicle by using a composite power supply or a super capacitor.
However, the current method for recovering braking and coasting energy based on the intention of the driver has great blindness and is greatly influenced by the driving habits of the driver. For example, when a traffic light is encountered, if the distance between the vehicle and the front vehicle is far, the driver releases an accelerator pedal to slide, and the whole vehicle slides to recover energy, so that the kinetic energy of the vehicle is not enough to maintain the distance between the vehicle and the front vehicle and the vehicle can stop. At the moment, the driver needs to step on the accelerator pedal again for refueling, and energy waste is caused at the moment in view of the conversion efficiency of oil and electricity.
Disclosure of Invention
The present invention is directed to solving at least one of the problems set forth above, and the object is achieved by the following means.
The invention provides a control method for recovering braking and sliding energy of a vehicle, which comprises the following steps;
fully releasing an accelerator pedal of the vehicle;
detecting a distance value between the vehicle and a front vehicle through a detection system;
calculating a minimum vehicle speed value for performing braking and sliding energy recovery under the current distance between the vehicle and a front vehicle;
judging whether the real-time speed of the vehicle is greater than the minimum speed value of the vehicle for braking and sliding energy recovery;
and if the real-time speed of the vehicle is greater than the minimum speed value of the vehicle for performing braking and sliding energy recovery, performing braking and sliding energy recovery on the vehicle until the speed of the vehicle is less than the minimum speed value of the vehicle for performing braking and sliding energy recovery on the vehicle.
Further, the distance value between the vehicle and the front vehicle detected by the detection system is sent to a vehicle control unit through a CAN bus, and the minimum vehicle speed value for braking and sliding energy recovery under the current distance between the vehicle and the front vehicle is calculated through the vehicle control unit.
Further, whether the real-time vehicle speed of the vehicle is larger than the minimum vehicle speed value of the vehicle for braking and sliding energy recovery or not is judged through the vehicle control unit, and the braking and sliding energy recovery of the vehicle is carried out under the condition that the real-time vehicle speed is larger than the minimum vehicle speed value.
Further, the detection system is a radar system.
The invention further provides a control system for recovering the braking and sliding energy of the vehicle, which comprises a detection system and a vehicle control unit, wherein the vehicle control unit comprises an analysis system and an execution system, the detection system is used for detecting the distance value between the vehicle and the vehicle in front, the analysis system can analyze and calculate the minimum vehicle speed value of the vehicle for recovering the braking and sliding energy according to the distance value between the vehicle and the vehicle in front detected by the detection system, and the execution system can recover the braking and sliding energy of the vehicle when the real-time vehicle speed of the vehicle is greater than the minimum vehicle speed value of the vehicle for recovering the braking and sliding energy of the vehicle.
Furthermore, the detection system is in communication connection with the vehicle control unit through a CAN bus.
Further, the detection system is a radar system and is arranged at the front end of the vehicle.
By using the control method and the control system for recovering the braking sliding energy of the vehicle, whether the braking sliding energy of the vehicle is recovered or not can be judged based on the current speed of the vehicle and the distance between the current speed and the front vehicle, so that the blindness of manual decision and the waste of energy are avoided, the intelligent recovery of the braking sliding energy is realized, and the economy and the intelligence of the whole vehicle are improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a flow chart of a method for recovering braking and coasting energy of a vehicle using the embodiment of FIG. 1.
The reference symbols in the drawings denote the following:
10: a detection system;
20: vehicle control unit, 21: analysis system, 22: an execution system;
30: a CAN bus.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention. As shown in fig. 1, the control system for recovering energy generated by braking and coasting a vehicle according to the present invention includes a detection system 10 and a vehicle controller 20. The vehicle control unit 20 comprises an analysis system 21 and an execution system 22, the detection system 10 is used for detecting a distance value between the vehicle and a vehicle in front, the analysis system 21 can analyze and calculate a minimum vehicle speed value of the vehicle for performing braking and coasting energy recovery according to the distance value between the vehicle and the vehicle in front detected by the detection system 10, and the execution system 22 can recover the braking and coasting energy of the vehicle when the real-time vehicle speed of the vehicle is greater than the minimum vehicle speed value of the vehicle for performing braking and coasting energy recovery.
Further, the detection system 10 and the vehicle control unit 20 are communicatively connected through a CAN bus 30.
In this embodiment, the detection system 10 is a radar system and is disposed at the front end of the vehicle. The radar system sends the distance information to the vehicle control unit 20 through the CAN bus 30, and the distance information is used as a basis for the vehicle control unit 20 to decide whether to perform braking and sliding energy recovery and how much to recover. On the basis of the original control logic, when a driver completely releases an accelerator pedal, braking and sliding energy recovery can be carried out, and at the moment, the radar system starts to work. The radar system measures the distance from the front vehicle through a system algorithm of the radar system, and the vehicle control unit sends an instruction whether to perform braking and sliding energy recovery or not to the motor according to the control logic.
FIG. 2 is a flow chart of a method for recovering braking and coasting energy of a vehicle using the embodiment of FIG. 1. As shown in fig. 2, the energy recovery method includes the following steps;
the accelerator pedal of the vehicle is completely released.
The distance value between the vehicle and the preceding vehicle is detected by the detection system 10.
The radar system sends the distance information to the vehicle control unit 20 through the CAN bus 30, and the distance information is used as a basis for the vehicle control unit 20 to decide whether to perform braking and sliding energy recovery and how much to recover.
And calculating the minimum vehicle speed value for performing braking and sliding energy recovery under the current distance between the vehicle and the front vehicle.
And judging whether the real-time vehicle speed of the vehicle is greater than the minimum vehicle speed value for recovering the braking and sliding energy of the vehicle.
The minimum vehicle speed value of the braking and sliding energy recovery of the vehicle and the front vehicle at the current distance is analyzed and calculated through an analysis system 21 in the vehicle control unit 20, and whether the real-time vehicle speed of the vehicle is larger than the minimum vehicle speed value of the braking and sliding energy recovery of the vehicle is judged. The minimum speed value of the vehicle for braking and sliding energy recovery can be calculated based on parameters such as the whole vehicle weight, the wind resistance, the friction coefficient and the like of the vehicle.
If the real-time vehicle speed of the vehicle is greater than the minimum vehicle speed value for performing braking and coasting energy recovery on the vehicle, the execution system 22 performs braking and coasting energy recovery on the vehicle until the vehicle speed of the vehicle is less than the minimum vehicle speed value for performing braking and coasting energy recovery on the vehicle.
And if the vehicle speed of the vehicle is less than the minimum vehicle speed value for recovering the braking sliding energy of the vehicle, the vehicle slides without recovering the energy until the end.
By using the control method and the control system for recovering the braking sliding energy of the vehicle, whether the braking sliding energy of the vehicle is recovered or not can be judged based on the current speed of the vehicle and the distance between the current speed and the front vehicle, so that the blindness of manual decision and the waste of energy are avoided, the intelligent recovery of the braking sliding energy is realized, and the economy and the intelligence of the whole vehicle are improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (5)
1. A control method for performing braking and coasting energy recovery of a vehicle, characterized by comprising the steps of;
fully releasing an accelerator pedal of the vehicle;
detecting a distance value between the vehicle and a front vehicle through a detection system;
sending the distance value between the vehicle and the front vehicle detected by the detection system to a vehicle control unit through a CAN bus, and calculating the minimum vehicle speed value for braking and sliding energy recovery under the current distance between the vehicle and the front vehicle through the vehicle control unit;
judging whether the real-time vehicle speed of the vehicle is greater than the minimum vehicle speed value for braking and sliding energy recovery of the vehicle through the vehicle control unit;
and if the real-time speed of the vehicle is greater than the minimum speed value of the vehicle for performing braking and sliding energy recovery, performing braking and sliding energy recovery on the vehicle until the speed of the vehicle is less than the minimum speed value of the vehicle for performing braking and sliding energy recovery on the vehicle.
2. The control method for performing vehicle braking taxi energy recovery of claim 1, wherein the detection system is a radar system.
3. The control system is characterized by comprising a detection system and a vehicle control unit, wherein the vehicle control unit comprises an analysis system and an execution system, the detection system is used for detecting a distance value between the vehicle and a vehicle in front, the analysis system can analyze and calculate a minimum vehicle speed value of the vehicle for braking and sliding energy recovery according to the distance value between the vehicle and the vehicle in front detected by the detection system, and the execution system can recover the braking and sliding energy of the vehicle when the real-time vehicle speed of the vehicle is greater than the minimum vehicle speed value of the vehicle for braking and sliding energy recovery.
4. The control system for performing vehicle braking and coasting energy recovery according to claim 3, wherein the detection system and the vehicle control unit are communicatively connected via a CAN bus.
5. A control system for providing brake coast energy recovery for a vehicle according to claim 4 wherein said detection system is a radar system and is located at the front end of said vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711440703.6A CN108556846B (en) | 2017-12-27 | 2017-12-27 | Control method and control system for recovering braking and sliding energy of vehicle |
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| CN201711440703.6A CN108556846B (en) | 2017-12-27 | 2017-12-27 | Control method and control system for recovering braking and sliding energy of vehicle |
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| CN108556846A CN108556846A (en) | 2018-09-21 |
| CN108556846B true CN108556846B (en) | 2020-03-06 |
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| CN201711440703.6A Active CN108556846B (en) | 2017-12-27 | 2017-12-27 | Control method and control system for recovering braking and sliding energy of vehicle |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111038512B (en) * | 2019-12-25 | 2022-06-28 | 联合汽车电子有限公司 | Vehicle deceleration control method and vehicle control unit |
| CN112046466A (en) * | 2020-08-31 | 2020-12-08 | 上海伊控动力系统有限公司 | New energy automobile sliding energy recovery method based on road conditions |
| CN113212174B (en) * | 2021-05-31 | 2022-08-05 | 台州市佑吉车业科技股份有限公司 | Energy-saving endurance type electric vehicle |
| CN114212087A (en) * | 2021-11-10 | 2022-03-22 | 江铃汽车股份有限公司 | Energy recovery control method and device, readable storage medium and vehicle |
| CN114857254A (en) * | 2022-05-11 | 2022-08-05 | 潍柴动力股份有限公司 | Control method for neutral coasting of vehicle, automatic transmission and vehicle |
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| CN103370251A (en) * | 2010-11-30 | 2013-10-23 | 法雷奥开关和传感器有限责任公司 | Method for operating a vehicle and driver assistance device |
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| CN108556846A (en) | 2018-09-21 |
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