CN108327706A - A kind of electricity-generating control method and system of hybrid vehicle - Google Patents
A kind of electricity-generating control method and system of hybrid vehicle Download PDFInfo
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- CN108327706A CN108327706A CN201810260392.3A CN201810260392A CN108327706A CN 108327706 A CN108327706 A CN 108327706A CN 201810260392 A CN201810260392 A CN 201810260392A CN 108327706 A CN108327706 A CN 108327706A
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- power
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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
- B60W20/00—Control systems specially adapted for hybrid vehicles
-
- 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
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- 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
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/24—Energy storage means
- B60W2510/242—Energy storage means for electrical energy
Abstract
The present invention provides a kind of electricity-generating control method of hybrid vehicle and systems.This method comprises the following steps：Detect the SOC value of the power battery of hybrid vehicle；SOC value is compared with a default power threshold, enters idling power generation mode when SOC value is less than or equal to default power threshold；Under idling power generation mode, the engine power generation of hybrid vehicle, with to power battery charging, to the high pressure accessories by power battery charging for hybrid vehicle, the generated output grade of engine is adjusted according to the power of high pressure attachment, and each generated output grade corresponds to a preset generated output.The present invention adjusts the generated output grade of engine according to the power of high pressure attachment, both the power demand of high pressure attachment can have been met, ensure that power battery can charge again, not only allow for the battery capacity problem under idling operation, the electrical problem for having also contemplated high pressure attachment improves the control accuracy under the operating mode.
Description
Technical field
The present invention relates to the engine power generation technical field of vehicle hybrid vehicle, especially one kind being related to hybrid electric vehicle
Electricity-generating control method and system.
Background technology
Hybrid vehicle is relatively low in power battery electricity, and vehicle is under the operating mode of P gears or N gears, and power battery is deposited
Crossing the risk put.Power battery, which is crossed, in order to prevent puts, it will usually start engine to power battery charging, i.e. idling generates electricity.
Engine can be generated electricity in power generation process using Unified Power in the prior art, or carry out generated output
Grade classification.However, energy dissipation when can lead to low demand high power in such a way that Unified Power is generated electricity, and meeting
Since engine overheat and power battery caused by generated output is larger overcharge.The grade of generated output is drawn
Point mode more consider the factors such as cell voltage, speed, gas pedal aperture, and algorithm huge there is system it is complicated from
And the predicament being difficult to carry out, and it is not high to the control accuracy under single operating mode, it cannot achieve the stability contorting of engine.
Invention content
How both to meet high pressure under the operating mode that idling generates electricity it is an object of the present invention to solve hybrid vehicle
The power demand of attachment, and ensure that power battery can charge.
Another object of the present invention is the stability contorting of engine to be realized.
Particularly, the present invention provides a kind of electricity-generating control method of hybrid vehicle, include the following steps：
Detect the SOC value of the power battery of hybrid vehicle；
The SOC value is compared with a default power threshold, is less than or equal to the default electricity in the SOC value
Enter idling power generation mode when threshold value；
Under the idling power generation mode, the engine power generation of the hybrid vehicle, to be filled to the power battery
Electricity, to pass through the high pressure accessories that the power battery charging is the hybrid vehicle, the power generation of the engine
Power grade is adjusted according to the power of the high pressure attachment, and each generated output grade corresponds to a preset power generation work(
Rate.
Optionally, the generated output grade of the engine is chosen according to following formula,
Pidn’>Phpl+P0 (1)
Pid=Pmin(Pid1’,Pid2’…...Pidn’) (2)
Wherein, PhplIt is the power of high pressure attachment, P0It is greater than zero constant, Pidn' it is n-th of hair for meeting formula (1)
Electrical power grade, Pid1' it is the 1st generated output grade for meeting formula (1), Pid2' it is the 2nd power generation for meeting formula (1)
Power grade, Pmin(Pid1’,Pid2’…...Pidn') it is minimum generated output in all generated output grades for meet formula (1)
Grade, wherein minimum generated output grade corresponds to minimum generated output, PidIt is to be selected according to the power of the high pressure attachment
The generated output grade taken.
Optionally, the generated output grade of the engine is adjusted according to the power of the high pressure attachment, including as follows
Step：
Obtain the power of the high pressure attachment；
The generated output grade of the engine is chosen according to the power of the high pressure attachment；
The rotating speed of target and target torque of the engine are determined according to the generated output grade；
By the rotational speed regulation of the engine to the rotating speed of target, and the torque of the engine is adjusted to the mesh
Torque is marked, to realize the adjusting of the generated output grade.
Optionally, the corresponding generated output of the generated output grade is more than the power of the high pressure attachment.
Optionally, the power of the high pressure attachment is in section (Wmin, Wmax) in any power when, by the engine
Power generation grade be chosen for same generated output grade.
Optionally, the electricity-generating control method is further comprising the steps of：
Institute is exited when detecting that the SOC value of power battery of the hybrid vehicle is greater than or equal to SOC preset values
State idling power generation mode.
Optionally, the engine is controlled when exiting the idling power generation mode to shut down.
Optionally, the SOC preset values are set according to the driving mode of the hybrid vehicle, each driving mode
Corresponding SOC preset values are different.
Optionally, it is not up to the corresponding generated output of the generated output grade in the generated output of the engine, and
Less than the high pressure attachment power when, it is described dynamic to ensure by the power limit of the high pressure attachment in a predetermined power value
Power battery is in charged state.
Optionally, the power threshold is set according to the driving mode of the hybrid vehicle, each driving mode
Corresponding power threshold is different.
Accordingly, the present invention also provides a kind of power-generating control systems of hybrid vehicle, including：
Detection unit, the SOC value of the power battery for detecting the hybrid vehicle；
Engine, for controllably generating electricity when the SOC value is less than or equal to default power threshold, with to the power
Battery charges, and to be the high pressure accessories of the hybrid vehicle by the power battery charging, and described starts
The generated output grade of machine is configured to controllably adjust according to the power of the high pressure attachment, each generated output grade
A corresponding preset generated output.
Optionally, the engine includes：
Acquiring unit, the power for obtaining the high pressure attachment；
Selection unit, the generated output grade for choosing the engine according to the power of the high pressure attachment；
Determination unit, rotating speed of target and target torque for determining the engine according to the generated output grade；
Adjust unit, for by the rotational speed regulation of the engine to the rotating speed of target, and by the torsion of the engine
Square is adjusted to the target torque, to realize the adjusting of generated output grade.
The generated output of engine is divided into multiple grades by scheme according to the present invention, and according to the power of high pressure attachment
It adjusts the generated output grade of engine, can not only meet the power demand of high pressure attachment, but also ensure that power battery can fill
Electricity.Also, this method is simple and practical, and controllability is strong, not only allows for the battery capacity problem under idling operation, it is also considered that
The electrical problem of the high pressures attachment such as DCDC and air-conditioning, to improve the control accuracy under the operating mode.Further, it is also possible to according to hair
Electrical power grade increases to further increase the control accuracy under the operating mode.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Description of the drawings
Some specific embodiments that the invention will be described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical reference numeral denotes same or similar component or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing：
Fig. 1 is the schematic flow chart of the electricity-generating control method of hybrid vehicle according to an embodiment of the invention；
Fig. 2 is the schematic flow chart of the generated output grade according to an embodiment of the invention for adjusting engine；
Fig. 3 is the schematic block diagram of the power-generating control system of hybrid vehicle according to an embodiment of the invention；
Fig. 4 is the schematic block diagram of controller according to an embodiment of the invention.
Specific implementation mode
Fig. 1 shows the schematic flow of the electricity-generating control method of hybrid vehicle according to an embodiment of the invention
Figure.As shown in Figure 1, the electricity-generating control method includes：
Step S100, the SOC value of the power battery of detection hybrid vehicle；
Step S200, the SOC value is compared with a default power threshold, is less than or equal to institute in the SOC value
Enter idling power generation mode when stating default power threshold；Under the idling power generation mode, the hybrid vehicle starts
Machine generates electricity, with to the power battery charging, to pass through the high pressure that the power battery charging is the hybrid vehicle
The generated output grade of accessories, the engine is adjusted according to the power of the high pressure attachment, each power generation work(
Rate grade corresponds to a preset generated output.
According to the solutions of the embodiments of the present invention, the generated output of engine is divided into multiple grades, and according to high pressure attachment
Power adjust the generated output grade of engine, can not only meet the power demand of high pressure attachment, but also ensure power battery
It can charge.Also, this method is simple and practical, and controllability is strong, not only allows for the battery capacity problem under idling operation, also examines
The electrical problem for having considered the high pressures attachment such as DCDC and air-conditioning, to improve the control accuracy under the operating mode.Further, it is also possible to root
The control accuracy under the operating mode is further increased according to the increase of generated output grade.
In order to improve the usage experience of user, the power threshold in step S100 can be reduced as possible.Also, power threshold
It is set according to the driving mode of hybrid vehicle, the corresponding power threshold of each driving mode is different.Can so it make
Obtaining under different driving modes has good usage experience.
Fig. 2 shows the schematic flows of the generated output grade according to an embodiment of the invention for adjusting engine
Figure.As shown in Fig. 2, the generated output grade of the engine is adjusted according to the power of the high pressure attachment, including：
Step S210, the power of high pressure attachment is obtained；
Step S220, the generated output grade of engine is chosen according to the power of high pressure attachment；
Step S230, the rotating speed of target and target torque of engine are determined according to generated output grade；
Step S240, by the rotational speed regulation of engine to rotating speed of target, and the torque of engine is adjusted to target torque,
To realize the adjusting of generated output grade.
In step S230, the mesh of the corresponding engine of generated output grade can be inquired by the table that system stores
Mark rotating speed and target torque.Also, the corresponding generated output of generated output grade is more than the power of high pressure attachment.
In step S220 or in step s 200, the generated output grade of engine is selected according to following formula
It takes,
Pidn’>Phpl+P0 (1)
Pid=Pmin(Pid1’,Pid2’…...Pidn’) (2)
Wherein, PhplIt is the power of high pressure attachment, P0It is constant, Pidn' it is n-th of the generated output etc. for meeting formula (1)
Grade, Pid1' it is the 1st generated output grade for meeting formula (1), Pid2' it is the 2nd generated output grade for meeting formula (1),
Pmin(Pid1’,Pid2’…...Pidn') it is minimum generated output grade in all generated output grades for meet formula (1),
In, minimum generated output grade corresponds to minimum generated output, PidIt is the power generation work(chosen according to the power of high pressure attachment
Rate grade.
In other words, in above-mentioned steps S220, the generated output of engine need to only meet the power demand of high pressure attachment with
And ensure that power battery can charge, without using larger generated output grade.Not only ensure economy in this way, but also ensures
Preferable NVH performances.
For example, high pressure accessory power PhplFor 2KW, P0Generated output grade for 0.5KW, engine can be divided into four
Grade, the corresponding preset generated output of four grades is respectively 2KW, 3KW, 4.5KW and 6KW, then engine can be chosen
Generated output be 3KW, without choose 4.5KW and 6KW.For another example, high pressure accessory power PhplFor 3KW, P0For 0.6KW, engine
The corresponding preset generated output of generated output grade be respectively 2KW, 3KW, 4.5KW and 6KW, then engine can be chosen
Generated output be 4.5KW, without choose 6KW.In addition, the generated output grade of engine is not arbitrarily to be arranged, need to consider
Factors are such as vehicle NVH performances, engine model.
The setting of generated output grade is excessively careful, then power regulation can be caused excessively frequent, influence the usage experience of user.
The setting of generated output grade is excessively coarse, then power regulation can be caused not accurate, and control is inaccurate.Therefore, it is necessary to according to reality
It needs that generated output grade rationally is arranged.
Preferably, the power of the high pressure attachment is in section (Wmin, Wmax) in any power when, by the engine
Power generation grade be chosen for same generated output grade.In one embodiment, WmaxAnd WminDifference for example can be 300W,
350W, 400W or 450W etc., according to being set under actual conditions.In this way, high pressure accessory power can be prevented attached in a certain performance number
The saltus step of generated output grade when nearly fluctuation.
Wherein, it is not up to the corresponding generated output of generated output grade in the generated output of engine, and attached less than high pressure
When the power of part, by the power limit of high pressure attachment in a predetermined power value, to ensure that power battery is in charged state.
In one embodiment, which can also include the following steps：Detecting hybrid vehicle
Power battery SOC value be greater than or equal to SOC preset values when exit idling power generation mode.Exiting idling power generation mode time control
Engine processed is shut down.The SOC preset values are set according to the driving mode of hybrid vehicle, and each driving mode is corresponding
SOC preset values are different.
Fig. 3 shows the schematic frame of the power-generating control system of hybrid vehicle according to an embodiment of the invention
Figure.As shown in figure 3, the power-generating control system includes detection unit 100 and engine 200.Detection unit 100 is mixed for detecting
The SOC value of the power battery of power car.Engine 200 is used for when SOC value is less than or equal to default power threshold controllably
Power generation, to power battery charging, to be the high pressure accessories of hybrid vehicle by power battery charging, and to start
The generated output grade of machine is configured to the power of controllably foundation high pressure attachment to adjust, and each generated output grade corresponds to one
Preset generated output.The power-generating control system further includes comparing unit 300, for comparing SOC value and a power threshold
Compared with.
Fig. 4 shows the schematic block diagram of controller according to an embodiment of the invention.As shown in figure 4, the engine
200 include acquiring unit 210, selection unit 220, determination unit 230 and adjusting unit 240.Wherein, acquiring unit 210 is used for
Obtain the power of the high pressure attachment.Selection unit 220 is used to choose the generated output of engine according to the power of high pressure attachment
Grade.Determination unit 230 is used to determine the rotating speed of target and target torque of engine according to generated output grade.Adjust unit
240 to rotating speed of target, and by the torque of engine by the rotational speed regulation of engine for being adjusted to target torque, to realize hair
The adjusting of electrical power grade.
In one embodiment, which is configured to the SOC in the power battery for detecting hybrid vehicle
Value exits idling power generation mode when being greater than or equal to SOC preset values.Other technical solutions of the power-generating control system with it is above-mentioned
Electricity-generating control method is consistent, and details are not described herein again.
According to the solutions of the embodiments of the present invention, the generated output of engine is divided into multiple grades, controller in the system
The generated output grade that engine can be adjusted according to the power of high pressure attachment, can both meet the electricity consumption of high pressure attachment in this way
Demand, and ensure that power battery can charge.Also, the simple system is practical, not only allows for the battery electricity under idling operation
Amount problem, it is also considered that the electrical problem of the high pressures attachment such as DCDC and air-conditioning, to improve the control accuracy under the operating mode.This
Outside, the control accuracy under the operating mode can also be further increased by increasing generated output grade.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or derive many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers other all these variations or modifications.
Claims (10)
1. a kind of electricity-generating control method of hybrid vehicle, which is characterized in that include the following steps：
Detect the SOC value of the power battery of hybrid vehicle；
The SOC value is compared with a default power threshold, is less than or equal to the default power threshold in the SOC value
When enter idling power generation mode；
Under the idling power generation mode, the engine power generation of the hybrid vehicle, with to the power battery charging, from
And pass through the high pressure accessories that the power battery charging is the hybrid vehicle, the generated output etc. of the engine
Grade is adjusted according to the power of the high pressure attachment, and each generated output grade corresponds to a preset generated output.
2. electricity-generating control method according to claim 1, which is characterized in that the generated output grade of the engine
It is chosen according to following formula,
Pidn’>Phpl+P0 (1)
Pid=Pmin(Pid1’,Pid2’…...Pidn’) (2)
Wherein, PhplIt is the power of high pressure attachment, P0It is greater than zero constant, Pidn' it is n-th of generated output for meeting formula (1)
Grade, Pid1' it is the 1st generated output grade for meeting formula (1), Pid2' it is to meet the 2nd generated output of formula (1) etc.
Grade, Pmin(Pid1’,Pid2’…...Pidn') it is minimum generated output grade in all generated output grades for meet formula (1),
Wherein, minimum generated output grade corresponds to minimum generated output, PidIt is to be chosen according to the power of the high pressure attachment
The generated output grade.
3. electricity-generating control method according to claim 1 or 2, which is characterized in that according to the power of the high pressure attachment come
The generated output grade for adjusting the engine, includes the following steps：
Obtain the power of the high pressure attachment；
The generated output grade of the engine is chosen according to the power of the high pressure attachment；
The rotating speed of target and target torque of the engine are determined according to the generated output grade；
By the rotational speed regulation of the engine to the rotating speed of target, and the torque of the engine is adjusted to the target and is turned round
Square, to realize the adjusting of the generated output grade.
4. electricity-generating control method according to claim 1 or 2, which is characterized in that the corresponding hair of the generated output grade
Electrical power is more than the power of the high pressure attachment.
5. electricity-generating control method according to claim 4, which is characterized in that further comprising the steps of：
It is exited when detecting that the SOC value of power battery of the hybrid vehicle is greater than or equal to SOC preset values described idle
Fast power generation mode.
6. electricity-generating control method according to claim 5, which is characterized in that control institute when exiting the idling power generation mode
State engine shutdown.
7. electricity-generating control method according to claim 5, which is characterized in that the SOC preset values are dynamic according to the mixing
The driving mode of power vehicle is set, and the corresponding SOC preset values of each driving mode are different.
8. according to the electricity-generating control method described in any one of claim 2-7, which is characterized in that in the power generation of the engine
Power is not up to the corresponding generated output of the generated output grade, and when less than the power of the high pressure attachment, by the height
Press the power limit of attachment in a predetermined power value, to ensure that the power battery is in charged state.
9. a kind of power-generating control system of hybrid vehicle, which is characterized in that including：
Detection unit, the SOC value of the power battery for detecting the hybrid vehicle；
Engine, for controllably generating electricity when the SOC value is less than or equal to default power threshold, with to the power battery
Charging, thus by the high pressure accessories that the power battery charging is the hybrid vehicle, and the engine
Generated output grade is configured to controllably adjust according to the power of the high pressure attachment, and each generated output grade corresponds to
One preset generated output.
10. power-generating control system according to claim 9, which is characterized in that the engine includes：
Acquiring unit, the power for obtaining the high pressure attachment；
Selection unit, the generated output grade for choosing the engine according to the power of the high pressure attachment；
Determination unit, rotating speed of target and target torque for determining the engine according to the generated output grade；
Adjust unit, for by the rotational speed regulation of the engine to the rotating speed of target, and by the torque tune of the engine
Section is to the target torque, to realize the adjusting of generated output grade.
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| CN112572165B (en) * | 2019-09-27 | 2023-02-10 | 比亚迪股份有限公司 | N-gear power generation control method, vehicle control unit, vehicle and storage medium |
| CN112572165A (en) * | 2019-09-27 | 2021-03-30 | 比亚迪股份有限公司 | N-gear power generation control method, vehicle control unit, vehicle and storage medium |
| CN112622868A (en) * | 2020-12-25 | 2021-04-09 | 中国第一汽车股份有限公司 | Dual-motor vehicle control method and device |
| CN112622868B (en) * | 2020-12-25 | 2022-04-19 | 中国第一汽车股份有限公司 | Dual-motor vehicle control method and device |
| CN113602256A (en) * | 2021-08-16 | 2021-11-05 | 东风汽车集团股份有限公司 | Series working condition control system and method for hybrid electric vehicle |
| CN113602256B (en) * | 2021-08-16 | 2023-04-25 | 东风汽车集团股份有限公司 | Series working condition control system and method for hybrid electric vehicle |
| CN114194031A (en) * | 2021-12-30 | 2022-03-18 | 东风汽车有限公司东风日产乘用车公司 | Lithium battery protection method, device, equipment and storage medium based on idle speed |
| CN115195476A (en) * | 2022-09-15 | 2022-10-18 | 盛瑞传动股份有限公司 | Vehicle energy management method, device, equipment, readable storage medium and vehicle |
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