CN113815599B - Control method and control device for hybrid vehicle and hybrid vehicle - Google Patents
Control method and control device for hybrid vehicle and hybrid vehicle Download PDFInfo
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- CN113815599B CN113815599B CN202010561609.1A CN202010561609A CN113815599B CN 113815599 B CN113815599 B CN 113815599B CN 202010561609 A CN202010561609 A CN 202010561609A CN 113815599 B CN113815599 B CN 113815599B
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000001179 sorption measurement Methods 0.000 claims abstract description 200
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 193
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 193
- 238000003795 desorption Methods 0.000 claims abstract description 23
- 238000012937 correction Methods 0.000 claims description 23
- 239000000446 fuel Substances 0.000 abstract description 10
- 229920006395 saturated elastomer Polymers 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 41
- 239000007789 gas Substances 0.000 description 17
- 230000008569 process Effects 0.000 description 8
- 238000001704 evaporation Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 7
- 229930195733 hydrocarbon Natural products 0.000 description 7
- 150000002430 hydrocarbons Chemical class 0.000 description 7
- 239000004215 Carbon black (E152) Substances 0.000 description 6
- 239000002828 fuel tank Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000029058 respiratory gaseous exchange Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000002060 circadian Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/15—Control strategies specially adapted for achieving a particular effect
-
- 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
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
The application provides a control method and a control device for a hybrid electric vehicle and the hybrid electric vehicle, and belongs to the field of vehicles. The control method for a hybrid vehicle includes: determining the carbon tank adsorption amount according to a pre-established carbon tank adsorption model when the vehicle is in an electric mode; and switching the electric mode to a hybrid mode to perform carbon canister desorption under the condition that the carbon canister adsorption amount is larger than a preset value. According to the technical scheme provided by the application, the adsorption quantity of the carbon tank can be estimated under the condition of not increasing the hardware cost of parts and the like, and the running mode of the vehicle is automatically switched to the hybrid power mode before the carbon tank tends to be saturated so as to realize timely desorption of the carbon tank, so that the occurrence of the conditions of fuel steam leakage and the like caused by overload of the carbon tank is effectively avoided, and the carbon tank is ensured to be in an effective working state for a long time.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a control method and device for a hybrid electric vehicle and the hybrid electric vehicle.
Background
In order to reduce the evaporation emission of the engine fuel evaporation system, the oil gas recovery system generally adsorbs oil gas through a carbon tank, and the oil gas in the carbon tank is desorbed by utilizing the vacuum degree of an engine intake manifold and is led into engine fuel, so that the aim of cyclically adsorbing and desorbing the oil gas is fulfilled. However, in the daily driving process of the hybrid electric vehicle, the electric mode has a large duty ratio, so that the engine running time is short, the carbon tank flushing opportunity is low, and the oil-gas desorption capability is insufficient. As shown in fig. 1, the engine of the conventional gasoline vehicle is in an operation mode for a long time, so that the hydrocarbon adsorbed by the carbon canister can be desorbed in time, and the engine of the hybrid vehicle is too short in operation time, so that the hydrocarbon adsorbed by the carbon canister cannot be desorbed in time, and the condition of overload of the carbon canister is very easy to occur.
In order to meet the requirements of national standards and reduce the emission of the hybrid electric vehicle in the actual vehicle use process, the following two solutions are available at present.
The first scheme is as follows: the capacity of the carbon tank is enlarged to enhance the oil gas adsorption capacity. The enlarged carbon tank can absorb and recycle more oil gas generated by day and night ventilation emission and oil gas generated during refueling, so that the overload condition of the carbon tank can be reduced as much as possible. However, as new oil gas is continuously generated in the oil tank, hydrocarbons in the carbon tank are difficult to desorb in time, and even if the capacity of the carbon tank is increased, the carbon tank tends to be saturated with the migration of time, and the oil gas overflows from the carbon tank, so that the evaporation emission is deteriorated. In addition, the adoption of a larger carbon tank not only increases the purchase cost, but also is limited by the arrangement of the chassis during installation, and has certain limitations in cost performance and feasibility.
The second scheme is as follows: an evaporative emissions system was employed with NICRO (Non-Integrated Refueling Canister Only, non-integral control only refuel emissions canister system). The system controls the channel between the oil tank and the carbon tank through the isolating valve, and stores the oil gas generated during refueling and the oil gas generated under non-refueling conditions in the carbon tank and the oil tank respectively so as to reduce the oil gas adsorption burden of the carbon tank, thereby avoiding the evaporation and emission influence of the hybrid electric vehicle caused by insufficient adsorption capacity of the carbon tank to the greatest extent. However, the NICRO system requires replacement or addition of important parts, such as a high-pressure tank, an FTIV (Fuel Tank Isolation Valve, tank isolation valve) valve, and a DMTL (Diagnosis Module of Tank Leakage, tank leakage diagnosis module) module, which increases the cost of a large number of parts, and the structure is more complicated and the cost performance is low.
Disclosure of Invention
An object of an embodiment of the present application is to provide a control method and a control device for a hybrid vehicle, and a hybrid vehicle, so as to solve one or more of the above technical problems.
To achieve the above object, an embodiment of the present application provides a control method for a hybrid vehicle, the method including: determining the carbon tank adsorption amount according to a pre-established carbon tank adsorption model when the vehicle is in an electric mode; and switching the electric mode to a hybrid mode to perform carbon canister desorption under the condition that the carbon canister adsorption amount is larger than a preset value.
Optionally, determining the canister adsorption amount according to the canister adsorption model includes: determining the day and night adsorption quantity according to the average temperature of the whole day environment, the day and night temperature difference, the oil level of the oil tank and the number of days of the power-on interval of the vehicle; determining the refueling adsorption amount according to the refueling amount; and determining the canister adsorption amount based on the diurnal adsorption amount and the fueling adsorption amount.
Optionally, the determining the diurnal adsorption amount according to the average temperature of the whole day environment, the diurnal temperature difference, the oil level of the oil tank and the days of the power-on interval of the vehicle comprises: determining the single day and night adsorption amount of each day according to the daily ambient average temperature, the day and night temperature difference and the oil level of the oil tank; and determining the diurnal adsorption amount from the diurnal adsorption amount per day.
Optionally, the method further comprises: determining a carbon tank load amount according to a pre-established carbon tank load model when the vehicle is in a non-electric mode; and correcting the diurnal adsorption amount calculated in the canister adsorption model based on the canister load amount.
Optionally, the modifying the canister adsorption model based on the canister load amount includes: determining a carbon canister adsorption increment between the time after the carbon canister is desorbed and the current time according to the carbon canister adsorption model; determining a carbon tank load increment between the carbon tank after the carbon tank is detached and the current time according to the carbon tank load model; taking the ratio of the carbon tank load increment to the carbon tank adsorption increment as a correction coefficient of the diurnal adsorption quantity; and correcting the diurnal adsorption amount in the canister adsorption model using the correction coefficient.
Optionally, before the modifying the carbon canister adsorption model based on the carbon canister load amount, the method further includes: determining the duration between the carbon tank after the carbon tank is detached and the current time; and correcting the carbon tank adsorption model under the condition that the duration between the carbon tank after the carbon tank is desorbed and the current time exceeds the preset duration.
Optionally, the modifying the carbon canister adsorption model based on the carbon canister load amount further includes: and after the carbon tank desorption is completed, taking the desorbed carbon tank load determined by the carbon tank load model as an initial value of the carbon tank adsorption quantity.
In another aspect, the present application provides a control apparatus for a hybrid vehicle, the control apparatus including: the determining module is used for determining the carbon tank adsorption amount according to a pre-established carbon tank adsorption model when the vehicle is in an electric mode; and the switching module is used for switching the electric mode into a hybrid power mode to carry out carbon tank desorption under the condition that the carbon tank adsorption quantity is larger than a preset value.
In another aspect, the present application provides a machine-readable storage medium having stored thereon instructions for causing a machine to perform the control method for a hybrid vehicle of any one of the above-described applications.
In another aspect, the present application provides a hybrid vehicle that controls the vehicle to perform desorption treatment on a canister using the control method for a hybrid vehicle according to any one of the above-described embodiments of the present application.
Through the technical scheme, the carbon tank adsorption quantity can be estimated under the condition that the hardware cost of parts and the like is not increased, and the operation mode of the vehicle is automatically switched to the hybrid power mode before the carbon tank tends to be saturated so as to realize timely desorption of the carbon tank, so that the occurrence of the conditions of fuel steam leakage and the like caused by overload of the carbon tank is effectively avoided, and the carbon tank is ensured to be in an effective working state for a long time.
Additional features and advantages of embodiments of the application will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain, without limitation, the embodiments of the application. In the drawings:
FIG. 1 is a comparison of fuel evaporation provided by an embodiment of the present application;
fig. 2 is a flowchart of a control method for a hybrid vehicle according to an embodiment of the present application;
FIG. 3 is a flow chart of a method for determining canister adsorption increments provided by an embodiment of the application;
FIG. 4 is a flow chart of a method for determining canister adsorption increments provided by an embodiment of the application;
fig. 5 is a flowchart of a control method for a hybrid vehicle according to an embodiment of the present application;
fig. 6 is a block diagram of a control apparatus for a hybrid vehicle according to an embodiment of the present application.
Description of the reference numerals
610. Determination module 620 switches modules
Detailed Description
The following describes the detailed implementation of the embodiments of the present application with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the application, are not intended to limit the application.
Fig. 2 is a flowchart of a control method for a hybrid vehicle according to an embodiment of the present application. As shown in fig. 2, the control method for the hybrid vehicle includes steps S210 to S220.
In step S210, when the vehicle is in the electric mode, a canister adsorption amount is determined according to a canister adsorption model established in advance.
Considering that most of the oil gas adsorbed in the carbon tank comes from the oil gas generated by day and night ventilation emission and the oil gas generated during refueling, the carbon tank adsorption model provided by the embodiment of the application mainly determines the carbon tank adsorption amount when the vehicle is in the electric mode based on the oil gas.
Specifically, under the condition that the initial carbon tank adsorption amount is known, the carbon tank adsorption model can determine the day and night adsorption amount according to the time interval from the time of initializing the carbon tank adsorption value to the current time, and determine the refueling adsorption amount according to the refueling condition in the time interval, and on the basis, the carbon tank adsorption amount in the time interval can be determined through the carbon tank adsorption model, and the total carbon tank adsorption amount in the current time can also be determined.
When the refueling operation is detected, the carbon tank adsorption model can further determine the total adsorption amount of the current carbon tank according to the initial carbon tank adsorption amount, the day and night adsorption amount and the refueling adsorption amount generated in the refueling process.
In step S220, when the canister adsorption amount is greater than a preset value, the electric mode is switched to a hybrid mode to perform canister desorption.
Alternatively, the preset value may be determined comprehensively according to various factors such as the total capacity of the carbon tank and the requirement of the user, and is not necessarily limited to a specific value.
Alternatively, the canister desorption may also be performed if the canister adsorption amount is greater than a predetermined value as a percentage of the total canister capacity.
After switching to the hybrid mode, the engine may be automatically started under certain conditions. In the process of engine operation, the hydrocarbon in the carbon tank can be desorbed by utilizing the vacuum degree of the engine intake manifold, and the hydrocarbon amount adsorbed in the carbon tank is reduced.
According to the control method for the hybrid electric vehicle, the adsorption quantity of the carbon tank can be estimated under the condition that the engine is not started, and the running mode of the vehicle is automatically switched to the hybrid electric mode before the carbon tank tends to be saturated so as to realize timely desorption of the carbon tank, so that the conditions of fuel steam leakage and the like caused by overload of the carbon tank are effectively avoided, and the carbon tank is ensured to be in an effective working state for a long time.
According to the technical scheme provided by the embodiment of the application, the fuel evaporation and emission conditions of the hybrid electric vehicle can be optimized under the condition that the hardware cost of parts and the like is not increased, the requirement of regulations can be met, and the environment is protected.
Optionally, the embodiment of the application also provides a method for determining the day and night adsorption amount. Specifically, the adsorption capacity around the clock is mainly influenced by factors such as ambient temperature, temperature difference around the clock and oil level of an oil tank, so that calibration experiments (for example, a fuel system bench test based on a temperature control laboratory) can be performed in advance to obtain multiple groups of data, and then the comprehensive influence of the factors on the adsorption capacity around the clock is determined through the existing data fitting mode.
For vehicles, the ambient temperature and the day-night temperature difference can be obtained from the internet by a multimedia system of the vehicle, and can be input by terminal equipment such as a mobile phone, and the oil level of the oil tank can be provided by an instrument system.
The temperature data of the surrounding environment of the vehicle is complex, so that the temperature data of each day can be extracted for calculation and accumulated, and the average value of the temperature or the temperature difference in the preset duration can be considered as a parameter basis to determine the day and night respiration amount in the preset duration.
For example, when the entire vehicle is first powered on the same day, the diurnal breathing amount during the vehicle power-on interval may be determined from the average temperature of the environment throughout the day, the diurnal temperature difference, the tank oil level, and the number of days of the vehicle power-on interval. Wherein, in case of more than one whole day of the interval days, the daily single day and night adsorption amount can be determined according to the daily whole day ambient average temperature, day and night temperature difference and the oil tank oil level, and then the total day and night respiration amount during the vehicle power-on interval can be determined according to the daily single day and night adsorption amount.
Alternatively, the average ambient temperature and the average diurnal temperature difference during the power-on interval of the vehicle may be directly determined, and the total diurnal breathing volume of the vehicle during the power-on interval may be determined from the average ambient temperature, the average diurnal temperature difference, and the number of days of the power-on interval.
Optionally, the embodiment of the application also provides a method for determining the refueling adsorption amount. Specifically, the calibration experiment can determine that the refueling adsorption amount extruded by refueling is in a linear relation with the refueling amount, so that the corresponding refueling adsorption amount can be directly determined according to the change of the oil level in the oil tank.
The specific linear relation between the refueling adsorption amount and the refueling amount can be determined by adopting a specific fuel tank to carry out calibration experiments in consideration of the differences of the shapes and the capacities of the fuel tanks of different vehicle types.
In a subsequent application, the canister adsorption model may determine the amount of fueling adsorption resulting from the fueling operation based on the tank level change information provided by the instrument system.
Considering that the carbon tank adsorption model provided by the embodiment of the application mainly determines the current adsorption amount of the carbon tank according to the initial value of the adsorption amount of the carbon tank, the day and night adsorption amount and the refueling adsorption amount, the day and night adsorption amount is also affected by partial uncontrollable factors or difficult to quantitatively estimate factors in the running process of the vehicle, for example, the actual infiltrated environment temperature of the vehicle is different from the reported local weather temperature in different parking environments (such as underground garages or open air all the year round); the hydrocarbon components in the fuel oil are various and the volatility is inconsistent, so that the oil quality is gradually changed along with the normal use and evaporation of the fuel oil, and the light hydrocarbon components are gradually reduced, so that the overall volatility of the fuel oil is reduced; the fuel in the fuel tank can shake to different degrees due to the influence of the driving habit of a user, so that the volatilization, overflow and the like of the fuel can be influenced to a certain extent.
In order to further improve the reliability of the carbon tank adsorption capacity determined by the carbon tank adsorption model, the embodiment of the application also provides a correction method of the carbon tank adsorption model.
During operation of the vehicle engine, the ECU (Engine Control Unit ) is capable of calculating and determining the canister load amount in real time based on a pre-established canister load model. The carbon tank load model can obtain more accurate carbon tank load amount by performing closed-loop control according to the oxygen sensor, so that the carbon tank adsorption model can be corrected based on the carbon tank load amount determined by the carbon tank load model.
Specifically, the carbon tank load model can determine the carbon tank load increment between the last carbon tank desorption and the current time, and the carbon tank adsorption model can also determine the carbon tank adsorption increment between the last carbon tank desorption and the current time, so that the ratio of the carbon tank load increment to the carbon tank adsorption increment can be used as a correction coefficient of the day and night adsorption quantity, and the correction of the carbon tank adsorption model can be completed by correcting the day and night adsorption quantity by adopting the correction coefficient.
Considering that errors generated in the adsorption amount determined by the carbon tank adsorption model in a short period of time do not affect the carbon tank adsorption function, and frequent calculation and correction increase the system pressure and waste calculation resources, the carbon tank adsorption model can be corrected after each preset time period.
For example, the carbon canister adsorption model may be corrected after several days after each correction is completed, or may be corrected once after the duration between the last carbon canister desorption time and the current time exceeds a preset duration. The number of days, the preset duration and the like can be set according to actual requirements, and the application is not limited to this.
In the embodiment of the application, the carbon tank adsorption model is corrected by determining the correction coefficient after a period of time, so that the correction coefficient can stably represent the habit of a user.
In addition, the carbon tank adsorption model also needs to determine the current adsorption amount of the carbon tank based on the initial value of the carbon tank adsorption amount, so that the desorbed carbon tank load determined by the carbon tank load model can be used as the initial value of the carbon tank adsorption amount after the carbon tank desorption is completed.
The method for correcting the carbon tank adsorption model can combine the carbon tank adsorption model with the existing carbon tank load model of the engine, and automatically correct the carbon tank adsorption model after the engine is started so as to improve the calculation accuracy of the carbon tank adsorption model.
With reference to fig. 3 to 5, a specific embodiment will now be explained in detail to provide a technical solution according to an embodiment of the present application.
In the case where the vehicle is not in a refueling operation, the canister adsorption model determines canister adsorption increment by the method shown in fig. 3.
Specifically, under the condition that the whole vehicle is electrified for the first time on the same day, the single day and night adsorption quantity is calculated according to the average air temperature, the day and night temperature difference and the oil level of the oil tank, and then the product of the single day and night adsorption quantity and the number of days of the electrification interval is taken as the day and night adsorption quantity, namely the adsorption increment.
Wherein, the single day and night adsorption amount of each day can be determined according to the average air temperature, the day and night temperature difference and the oil level of the oil tank, and then accumulated to determine the day and night adsorption amount, namely the adsorption increment, during the power-on interval.
Alternatively, in the case of correcting the canister adsorption model, it is necessary to multiply the total diurnal adsorption amount by a correction coefficient to determine the corrected diurnal adsorption amount and take it as the adsorption increment.
Optionally, the correction coefficient is a ratio of a carbon tank load increment determined by the carbon tank load model to a carbon tank adsorption capacity increment determined by the carbon tank adsorption model.
In the case of a refueling operation of the vehicle, the canister adsorption model determines canister adsorption increment by the method shown in fig. 4.
Specifically, when the refueling operation is detected, the refueling adsorption amount is determined according to the refueling amount and the unit refueling adsorption amount, then the adsorption increment is determined according to the determined day and night adsorption amount and the refueling adsorption amount, and under the condition that the initial value of the carbon tank adsorption amount is known, the carbon tank adsorption total amount can be determined according to the initial value of the carbon tank adsorption amount and the adsorption increment.
Wherein the initial value of the canister adsorption amount may be obtained from a canister load model. For example, during the engine start, the carbon tank load model may continuously obtain the real-time load of the carbon tank through the oxygen sensor, and after the engine start, the load finally output by the carbon tank load model may be used as the initial value of the carbon tank adsorption amount of the carbon tank adsorption model.
Fig. 5 is a flowchart of a control method for a hybrid vehicle according to an embodiment of the present application. As shown in fig. 5, when the vehicle is in the electric mode, if the canister adsorption amount determined by the canister adsorption model is greater than 80% of the canister capacity (which can be set by itself, for example, to any one of 75% to 85%), and the user does not switch to the HEV mode by itself (Hybrid Electric Vehicle, hybrid drive mode), the system will automatically switch to the HEV mode, in which the canister load amount determined by the canister load model is taken as the initial value of the canister adsorption amount.
When the carbon canister adsorption model is considered to be corrected, if the number of days of the interval between the two HEV modes is greater than 5 days (or the interval can be set to other durations by itself), the ratio of the carbon canister load increment to the carbon canister adsorption increment is used as a correction coefficient to correct the carbon canister load model, so that the accuracy of the carbon canister load model is improved.
Fig. 6 is a block diagram of a control apparatus for a hybrid vehicle according to an embodiment of the present application. As shown in fig. 6, the control device for a hybrid vehicle includes a determination module 610 and a switching module 620. The determining module 610 is configured to determine a canister adsorption amount according to a pre-established canister adsorption model when the hybrid vehicle is in an electric mode, and the switching module 620 is configured to switch the electric mode to the hybrid mode for canister desorption if the canister adsorption amount is greater than a preset value.
Optionally, the preset value may be set according to the capacity of the carbon tank and the actual requirement. For example, the preset value may be any value from 75% to 85% of the capacity of the carbon canister.
In some alternative embodiments, the determination module may determine the canister adsorption amount by: determining the day and night adsorption quantity according to the average temperature of the whole day environment, the day and night temperature difference, the oil level of the oil tank and the number of days of the power-on interval of the vehicle; determining the refueling adsorption amount according to the refueling amount; and determining the canister adsorption amount based on the diurnal adsorption amount and the fueling adsorption amount.
Wherein, when the number of days of the power-on interval exceeds one day, the single day and night adsorption amount of the day can be determined at the temperature of the certain day, and the total day and night adsorption amount during the power-on interval can be determined according to the single day and night adsorption amount.
Further, to improve the accuracy of the circadian adsorption amount, the circadian adsorption amount per day may be determined first and then accumulated to determine the total circadian adsorption amount during the power-on interval.
In some alternative embodiments, the control device for a hybrid vehicle may further include a correction module configured to correct the diurnal adsorption amount in the canister adsorption model according to a canister load amount determined by a pre-established canister load model when the vehicle is in a non-electric mode.
Specifically, a ratio of a carbon tank load increment determined by the carbon tank load model and between the carbon tank detachment and the current time to a carbon tank adsorption increment determined by the carbon tank adsorption model and between the carbon tank detachment and the current time is used as a correction coefficient, and the diurnal adsorption quantity in the carbon tank adsorption model is corrected by using the correction coefficient so as to realize correction of the carbon tank adsorption model.
Further, in order to more accurately represent the habit of the user and reduce the waste of computing resources, the carbon tank adsorption model can be corrected under the condition that the last carbon tank desorption time exceeds the preset time.
Optionally, the correction module may further use the desorbed carbon canister load determined by the carbon canister load model as the initial value of the carbon canister adsorption amount after the carbon canister desorption is completed, so as to complete correction of the initial value of the carbon canister adsorption amount of the carbon canister adsorption model.
For specific details and benefits of the control device for a hybrid vehicle according to the embodiment of the present application, reference may be made to the description of the control method for a hybrid vehicle provided by the present application, and the details are not repeated herein.
The embodiment of the application also provides a hybrid vehicle, which adopts the method for the dragon of the hybrid vehicle according to any one of the above embodiments of the application to control the vehicle to carry out desorption treatment on the carbon tank.
The embodiment of the application also provides a machine-readable storage medium, wherein the machine-readable storage medium is stored with instructions for causing a machine to execute the control method for the hybrid vehicle provided by the embodiment of the application.
The foregoing details of the optional implementation of the embodiment of the present application have been described in detail with reference to the accompanying drawings, but the embodiment of the present application is not limited to the specific details of the foregoing implementation, and various simple modifications may be made to the technical solution of the embodiment of the present application within the scope of the technical concept of the embodiment of the present application, and these simple modifications all fall within the protection scope of the embodiment of the present application.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combinations of embodiments of the present application are not described in detail.
Those skilled in the art will appreciate that all or part of the steps in implementing the methods of the embodiments described above may be implemented by a program stored in a storage medium, including instructions for causing a single-chip microcomputer, chip or processor (processor) to perform all or part of the steps of the methods of the embodiments described herein. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (8)
1. A control method for a hybrid vehicle, characterized by comprising:
determining the carbon tank adsorption amount according to a pre-established carbon tank adsorption model when the vehicle is in an electric mode; and
under the condition that the carbon tank adsorption capacity is larger than a preset value, switching the electric mode into a hybrid power mode to perform carbon tank desorption;
determining the canister adsorption amount according to the canister adsorption model includes:
determining the day and night adsorption quantity according to the average temperature of the whole day environment, the day and night temperature difference, the oil level of the oil tank and the number of days of the power-on interval of the vehicle;
determining the refueling adsorption amount according to the refueling amount; and
determining the canister adsorption amount according to the diurnal adsorption amount and the fueling adsorption amount;
determining a carbon tank load amount according to a pre-established carbon tank load model when the vehicle is in a non-electric mode; and
and correcting the day and night adsorption quantity calculated in the carbon tank adsorption model by taking the carbon tank load quantity as a basis.
2. The control method according to claim 1, wherein the determining the diurnal adsorption amount based on the diurnal ambient average temperature, the diurnal temperature difference, the tank oil level, and the number of days of the vehicle power-on interval includes:
determining the single day and night adsorption amount of each day according to the daily ambient average temperature, the day and night temperature difference and the oil level of the oil tank; and
and determining the day and night adsorption amount according to the day and night adsorption amount.
3. The control method according to claim 1, wherein the correcting the canister adsorption model based on the canister load amount includes:
determining a carbon canister adsorption increment between the time after the carbon canister is desorbed and the current time according to the carbon canister adsorption model;
determining a carbon tank load increment between the carbon tank after the carbon tank is detached and the current time according to the carbon tank load model;
taking the ratio of the carbon tank load increment to the carbon tank adsorption increment as a correction coefficient of the diurnal adsorption quantity; and
and correcting the diurnal adsorption amount in the carbon tank adsorption model by using the correction coefficient.
4. The control method according to claim 3, wherein before the correction of the canister adsorption model based on the canister load amount, the method further comprises:
determining the duration between the carbon tank after the carbon tank is detached and the current time; and
and correcting the carbon tank adsorption model under the condition that the time between the carbon tank after the carbon tank is detached and the current time exceeds the preset time.
5. The control method according to claim 1, wherein the correcting the canister adsorption model based on the canister load amount further comprises:
and after the carbon tank desorption is completed, taking the desorbed carbon tank load determined by the carbon tank load model as an initial value of the carbon tank adsorption quantity.
6. A control device for a hybrid vehicle, characterized by comprising:
the determining module is used for determining the carbon tank adsorption amount according to a pre-established carbon tank adsorption model when the vehicle is in an electric mode; and
the switching module is used for switching the electric mode into a hybrid power mode to carry out carbon tank desorption under the condition that the carbon tank adsorption capacity is larger than a preset value;
determining the canister adsorption amount according to the canister adsorption model includes:
determining the day and night adsorption quantity according to the average temperature of the whole day environment, the day and night temperature difference, the oil level of the oil tank and the number of days of the power-on interval of the vehicle;
determining the refueling adsorption amount according to the refueling amount; and
determining the canister adsorption amount according to the diurnal adsorption amount and the fueling adsorption amount;
the correction module is used for determining the carbon tank load according to a pre-established carbon tank load model when the vehicle is in a non-electric mode; and
and correcting the day and night adsorption quantity calculated in the carbon tank adsorption model by taking the carbon tank load quantity as a basis.
7. A machine-readable storage medium having stored thereon instructions for causing a machine to perform the control method for a hybrid vehicle of any of the preceding claims 1-5.
8. A hybrid vehicle characterized in that the hybrid vehicle controls the vehicle to perform desorption processing on a canister using the control method for a hybrid vehicle according to any one of claims 1 to 5.
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