CN113815599A - 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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- CN113815599A CN113815599A CN202010561609.1A CN202010561609A CN113815599A CN 113815599 A CN113815599 A CN 113815599A CN 202010561609 A CN202010561609 A CN 202010561609A CN 113815599 A CN113815599 A CN 113815599A
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000001179 sorption measurement Methods 0.000 claims abstract description 192
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 190
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 190
- 238000003795 desorption Methods 0.000 claims abstract description 27
- 238000012937 correction Methods 0.000 claims description 24
- 238000012545 processing Methods 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 8
- 229920006395 saturated elastomer Polymers 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 48
- 239000007789 gas Substances 0.000 description 20
- 230000008569 process Effects 0.000 description 9
- 239000000295 fuel oil Substances 0.000 description 6
- 239000002828 fuel tank Substances 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
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- 238000002474 experimental method Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 230000029058 respiratory gaseous exchange Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 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
- 238000009825 accumulation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 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
- 238000011084 recovery Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
The invention provides a control method and a control device for a hybrid vehicle and the hybrid vehicle, and belongs to the field of vehicles. The control method for a hybrid vehicle includes: when the vehicle is in an electric mode, determining the adsorption capacity of the carbon tank according to a pre-established carbon tank adsorption model; and under the condition that the adsorption capacity of the carbon tank is larger than a preset value, switching the electric mode into a hybrid power mode to perform carbon tank desorption. According to the technical scheme provided by the invention, the adsorption capacity of the carbon tank can be estimated when the engine is not started under the condition that hardware cost of parts and the like is not increased, and the running mode of the vehicle is automatically switched to the hybrid power mode before the carbon tank is 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 can be ensured to be in an effective working state for a long time.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a control method and a control device for a hybrid vehicle and the hybrid vehicle.
Background
In order to reduce the evaporative emission of an engine fuel oil evaporation system, an oil gas recovery system generally adsorbs oil gas through a carbon tank, the oil gas in the carbon tank is desorbed by utilizing the vacuum degree of an engine intake manifold, and engine fuel is introduced to achieve the purpose of circularly adsorbing and desorbing the oil gas. However, in the daily running process of the hybrid electric vehicle, the electric mode accounts for a large proportion, so that the running time of the engine is short, the carbon tank flushing opportunity is less, and the oil-gas desorption capacity is insufficient. As shown in fig. 1, an engine of a conventional gasoline vehicle is in an operation mode for a long time, so that oil gas adsorbed by a canister can be desorbed in time, while the operation time of the engine of the hybrid vehicle is too short, and the oil gas adsorbed by the canister cannot be desorbed in time, so that the canister is easily overloaded.
In order to meet the requirements of national standards and reduce the emission of hybrid electric vehicles in the actual use process, the following two solutions are available.
The first scheme is as follows: the capacity of the carbon tank is enlarged to enhance the oil gas adsorption capacity. The expanded carbon tank can adsorb and recover more oil gas generated by ventilation and emission in day and night and oil gas generated during refueling, so that the overload condition of the carbon tank can be reduced as much as possible. However, new oil gas is continuously generated in the oil tank, hydrocarbons in the carbon tank are difficult to desorb in time, even if the capacity of the carbon tank is increased, the carbon tank tends to be saturated along with the time shift, and the oil gas overflows from the carbon tank, so that the evaporative emission is deteriorated. In addition, the use 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 on cost performance and feasibility.
The second scheme is as follows: an NICRO (Non-Integrated Refueling Canister Only, Non-Integrated control Only Refueling emission Canister system) evaporative emissions system was employed. This system passes through the passageway between isolation valve control oil tank and the carbon tank, and the oil gas that produces when will refueling is stored respectively in carbon tank and oil tank with the oil gas that produces under the non-refueling condition to alleviate the oil gas adsorption burden of carbon tank, thereby furthest avoids hybrid vehicle because the evaporation that the carbon tank adsorption capacity is not enough brings discharges the influence. However, the NICRO system needs to replace or add important components, such as a high-pressure Fuel Tank, an FTIV (Fuel Tank Isolation Valve) Valve, a DMTL (Fuel Tank Leakage Diagnosis Module), and the like, which increases a lot of component costs, and has a more complicated structure and a low cost performance.
Disclosure of Invention
An object of an embodiment of the present invention 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.
In order to achieve the above object, an embodiment of the present invention provides a control method for a hybrid vehicle, the method including: when the vehicle is in an electric mode, determining the adsorption capacity of the carbon tank according to a pre-established carbon tank adsorption model; and under the condition that the adsorption capacity of the carbon tank is larger than a preset value, switching the electric mode into a hybrid power mode to perform carbon tank desorption.
Optionally, determining the canister adsorption amount according to the canister adsorption model includes: determining day and night adsorption quantity according to the average ambient temperature, day and night temperature difference, the oil level of an oil tank and the number of days between the electrification of the vehicle all day; determining the refueling adsorption capacity according to the refueling capacity; and determining the adsorption capacity of the carbon tank according to the day and night adsorption capacity and the refueling adsorption capacity.
Optionally, the determining the diurnal adsorption amount according to the average ambient temperature throughout the day, the diurnal temperature difference, the oil level of the oil tank, and the number of days between the vehicle power-on intervals includes: determining daily single day and night adsorption quantity according to daily whole day environment average temperature, day and night temperature difference and oil tank oil level; and determining the diurnal adsorption amount according to the diurnal adsorption amount per day.
Optionally, the method further includes: when the vehicle is in a non-electric mode, determining the load capacity of the carbon tank according to a pre-established carbon tank load model; and correcting the day and night adsorption amount calculated in the carbon tank adsorption model by taking the carbon tank load amount as a basis.
Optionally, 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 desorption and the current time according to the carbon canister adsorption model; determining a carbon tank load increment between the time after the carbon tank is desorbed 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 day and night adsorption amount in the carbon tank adsorption model by using the correction coefficient.
Optionally, before the carbon canister adsorption model is corrected based on the carbon canister load, the method further includes: determining the time length between the time after the carbon tank is desorbed and the current time; and correcting the carbon tank adsorption model under the condition that the time length between the carbon tank desorption and the current time exceeds the preset time length.
Optionally, the correcting the canister adsorption model based on the canister load further includes: and after the carbon tank desorption is finished, taking the desorbed carbon tank load quantity determined by the carbon tank load model as an initial value of the carbon tank adsorption quantity.
In another aspect, the present invention provides a control apparatus for a hybrid vehicle, the control apparatus including: the determining module is used for determining the adsorption capacity of the carbon tank according to a pre-established carbon tank adsorption model when the vehicle is in the electric mode; and the switching module is used for switching the electric mode into a hybrid power mode to perform carbon tank desorption under the condition that the adsorption capacity of the carbon tank is greater than a preset value.
In another aspect, the present disclosure provides a machine-readable storage medium having stored thereon instructions for causing a machine to execute a control method for a hybrid vehicle as described in any one of the above.
In another aspect, the invention provides a hybrid vehicle that controls the vehicle to perform desorption processing on a canister by using the control method for a hybrid vehicle described in any one of the above.
Through the technical scheme, the adsorption capacity of the carbon tank can be estimated when the engine is not started under the condition that the hardware cost of parts and the like is not increased, and the running mode of the vehicle is automatically switched into the hybrid power mode before the carbon tank tends to be saturated so as to realize and desorb the carbon tank in time, so that the situations of fuel steam leakage and the like caused by overload of the carbon tank are effectively avoided, and the carbon tank can be ensured to be in an effective working state for a long time.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a graph comparing fuel evaporation provided by an embodiment of the present invention;
fig. 2 is a flowchart illustrating a control method for a hybrid vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic flow diagram of a method for determining canister adsorption delta provided by an embodiment of the present invention;
FIG. 4 is a schematic flow diagram of a method for determining canister adsorption delta provided by an embodiment of the present invention;
fig. 5 is a flowchart illustrating a control method for a hybrid vehicle according to an embodiment of the present invention;
fig. 6 is a block diagram showing the configuration of a control device for a hybrid vehicle according to an embodiment of the present invention.
Description of the reference numerals
610 determination module 620 switching module
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
Fig. 2 is a flowchart illustrating a control method for a hybrid vehicle according to an embodiment of the present invention. As shown in fig. 2, the control method for the hybrid vehicle includes steps S210 to S220.
In step S210, a canister adsorption amount is determined according to a pre-established canister adsorption model while the vehicle is in the motoring mode.
Considering that most of the oil gas adsorbed in the carbon tank is from oil gas generated by ventilation emission in day and night and oil gas generated during refueling, the carbon tank adsorption model provided by the embodiment of the invention is mainly used for determining the carbon tank adsorption quantity when the vehicle is in an electric mode.
Specifically, under the condition that the initial adsorption amount of the carbon tank is known, the carbon tank adsorption model can determine the day and night adsorption amount according to the time interval from the carbon tank adsorption value initialization time to the current time, and determine the refueling adsorption amount according to the refueling condition in the time interval, on the basis, the carbon tank adsorption model can determine the carbon tank adsorption amount in the time interval, and can also determine the total adsorption amount of the carbon tank at the current time.
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 adsorption amount of the carbon tank, 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 the hybrid mode to perform canister desorption.
Optionally, the preset value may be determined comprehensively according to various factors such as the total capacity of the carbon tank and the user demand, and is not limited to a specific value.
Alternatively, the canister desorption may be performed in a case where the percentage of the canister adsorption amount to the total canister capacity exceeds a preset value.
After switching to the hybrid mode, the engine may be automatically started under certain conditions. In the working process of the engine, the oil gas in the carbon tank can be desorbed by utilizing the vacuum degree of an air inlet manifold of the engine, and the adsorbed oil gas amount in the carbon tank is reduced.
According to the control method for the hybrid vehicle provided by the embodiment of the invention, the adsorption capacity 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 mode before the carbon tank is saturated so as to realize timely desorption of the carbon tank, so that the situations of fuel steam leakage and the like caused by overload of the carbon tank are effectively avoided, and the carbon tank can be ensured to be in an effective working state for a long time.
By the technical scheme provided by the embodiment of the invention, the fuel evaporation and emission condition of the hybrid vehicle can be optimized under the condition of not increasing hardware cost of parts and the like, the regulation requirements can be met, and the environment is protected.
Optionally, the embodiment of the invention also provides a method for determining the diurnal adsorption quantity. Specifically, the adsorption capacity of day and night is mainly influenced by factors such as ambient temperature, temperature difference of day and night, oil level of an oil tank and the like, 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 the comprehensive influence of the factors on the adsorption capacity of day and night is determined through the existing data fitting mode.
For vehicles, the ambient temperature and the diurnal temperature difference can be obtained from the internet by a multimedia system of the vehicle, and can also 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 accumulation, and the average value of the temperature or the temperature difference in the preset time can be taken as a parameter to determine the day and night respiration volume in the preset time.
For example, when the vehicle is powered on for the first time on the same day, the diurnal breathing amount during the vehicle power-on interval may be determined from the ambient average temperature throughout the day, the diurnal temperature difference, the tank oil level, and the number of days of the vehicle power-on interval. Wherein, in the case that the number of days is more than one day, the single day and night adsorption amount of each day can be determined according to the average ambient temperature, the day and night temperature difference and the oil level of the oil tank of each day, and then the total day and night respiratory amount during the vehicle power-on interval can be determined according to the single day and night adsorption amount of each day.
Alternatively, the average ambient temperature and the average circadian temperature difference during the vehicle power-on interval may be directly determined, and the total circadian respiration volume of the vehicle during the power-on interval may be determined from the average ambient temperature, the average circadian temperature difference, and the number of power-on interval days.
Optionally, the embodiment of the invention further provides a method for determining the fueling adsorption quantity. Specifically, the calibration experiment can determine that the refueling adsorption capacity extruded by refueling and the refueling capacity are in a linear relationship, so that the refueling adsorption capacity corresponding to the refueling adsorption capacity can be directly determined according to the change of the oil level in the oil tank.
The specific linear relation between the refueling adsorption capacity and the refueling capacity can be determined by adopting a specific fuel tank to carry out calibration experiments in consideration of the difference of the shapes and the capacities of the fuel tanks of different vehicle types.
In the subsequent application process, the carbon tank adsorption model can determine the refueling adsorption quantity generated by refueling operation according to the fuel tank fuel level change information provided by the instrument system.
Considering that the carbon canister adsorption model provided by the above embodiment of the present invention mainly determines the current adsorption amount of the carbon canister according to the initial value of the adsorption amount of the carbon canister, the adsorption amount of the carbon canister during day and night, and the adsorption amount of the carbon canister during day and night may be affected by some uncontrollable factors or factors difficult to quantitatively estimate in the running process of the vehicle, for example, the environment temperature for the vehicle to actually soak in different parking environments (such as an underground garage or a perennial open air) may be different from the reported local weather temperature; the hydrocarbon components in the fuel oil are various and inconsistent in volatility, so that along with the normal use and evaporation of the fuel oil, the oil quality is gradually changed, the light hydrocarbon components are gradually reduced, and the overall volatility of the fuel oil is reduced; the fuel oil in the oil tank can shake to different degrees due to the influence of the driving habits of users, so that the volatilization, overflow and the like of the fuel oil can be influenced to a certain degree.
In order to further improve the reliability of the carbon tank adsorption quantity determined by the carbon tank adsorption model, the embodiment of the invention also provides a correction method of the carbon tank adsorption model.
During the running of the vehicle Engine, an ECU (Engine Control Unit) can calculate and determine the carbon canister load amount in real time according to a carbon canister load model established in advance. The carbon tank load model can be subjected to closed-loop control according to the oxygen sensor to obtain relatively accurate carbon tank load, so that the carbon tank adsorption model can be corrected according to the carbon tank load determined by the carbon tank load model.
Specifically, the carbon tank load model can determine the carbon tank load increment between the latest carbon tank desorption and the current time, and the carbon tank adsorption model can also determine the carbon tank adsorption increment between the latest 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 diurnal adsorption quantity, and the correction of the carbon tank adsorption model can be completed by correcting the diurnal adsorption quantity by adopting the correction coefficient.
Considering that the adsorption function of the carbon tank is not affected by errors generated in a short time by the adsorption quantity determined by the carbon tank adsorption model, and the system pressure is increased by frequent calculation and correction, which wastes calculation resources, the carbon tank adsorption model can be corrected after every preset time period.
For example, the correction may be performed after several days after each correction is completed, or the carbon canister adsorption model may be corrected once after the time between the last carbon canister desorption and the current time exceeds a preset time. The number of days, the preset duration and the like can be set according to actual requirements, and the invention is not limited to this.
In the embodiment of the invention, the correction coefficient is determined to correct the carbon tank adsorption model 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 according to the initial value of the adsorption amount of the carbon tank, so that the load amount of the carbon tank after desorption determined by the carbon tank load model can be used as the initial value of the adsorption amount of the carbon tank after the desorption of the carbon tank is completed.
According to the method for correcting the carbon tank adsorption model, the carbon tank adsorption model can be combined with the existing carbon tank load model of the engine, and the carbon tank adsorption model is automatically corrected after the engine is started, so that the calculation accuracy of the carbon tank adsorption model is improved.
With reference to fig. 3 to fig. 5, a technical solution provided by an embodiment of the present invention will be explained in detail by using a specific embodiment.
In the case where the vehicle is not fueling, the canister adsorption model determines the canister adsorption increase by the method shown in FIG. 3.
Specifically, under the condition that the whole vehicle is powered on 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 power-on intervals is used as the day and night adsorption quantity, namely the adsorption increment.
The adsorption amount of the oil tank can be determined by the average air temperature, the temperature difference and the oil level of the oil tank, and the adsorption amount can be determined by adding the adsorption amount of the oil tank to the adsorption amount of the oil tank.
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 as the adsorption increment.
Optionally, the correction coefficient is a ratio of a carbon canister load increment determined by the carbon canister load model to a carbon canister adsorption amount increment determined by the carbon canister adsorption model.
In the case where the vehicle has a refueling operation, the canister adsorption model determines the canister adsorption increase by the method shown in fig. 4.
Specifically, when the refueling operation is detected, the refueling adsorption quantity is determined according to the refueling quantity and the unit refueling adsorption quantity, then the adsorption increment is determined according to the determined day-night adsorption quantity and the refueling adsorption quantity, and under the condition that the initial value of the carbon tank adsorption quantity is known, the total carbon tank adsorption quantity can be determined according to the initial value of the carbon tank adsorption quantity and the adsorption increment.
Wherein the initial value of the carbon tank adsorption amount can be obtained from a carbon tank load model. For example, during the engine start, the carbon canister load model may continuously obtain the real-time load amount of the carbon canister through the oxygen sensor, and after the engine start, the load amount finally output by the carbon canister load model may be used as the initial value of the carbon canister adsorption amount of the carbon canister adsorption model.
Fig. 5 is a flowchart illustrating a control method for a hybrid vehicle according to an embodiment of the present invention. As shown in fig. 5, when the canister adsorption amount determined by the canister adsorption model is greater than 80% of the canister capacity (which may be set by itself, for example, any one of 75% to 85%) when the Vehicle is in the motoring mode, if the user does not switch to the HEV mode (Hybrid Electric Vehicle), the system automatically switches to the HEV mode in which the canister load amount determined by the canister load model is used as the initial value of the canister adsorption amount.
When the correction of the carbon tank adsorption model is considered, if the number of days between two HEV modes is more than 5 days (other time lengths can be set by self), the ratio of the carbon tank load increment and the carbon tank adsorption increment is used as a correction coefficient to correct the carbon tank load model so as to improve the accuracy of the carbon tank load model.
Fig. 6 is a block diagram showing the configuration of a control device for a hybrid vehicle according to an embodiment of the present invention. As shown in fig. 6, the control apparatus for a hybrid vehicle includes a determination module 610 and a switching module 620. The determination 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 a hybrid mode to perform canister desorption when 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 of 75% to 85% of the capacity of the canister.
In some alternative embodiments, the determination module may determine the canister adsorption capacity by: determining day and night adsorption quantity according to the average ambient temperature, day and night temperature difference, the oil level of an oil tank and the number of days between the electrification of the vehicle all day; determining the refueling adsorption capacity according to the refueling capacity; and determining the adsorption capacity of the carbon tank according to the day and night adsorption capacity and the refueling adsorption capacity.
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 according to the temperature of one day, and the total day and night adsorption amount during the power-on interval is determined according to the single day and night adsorption amount.
Further, in order to improve the accuracy of the diurnal adsorption amount, the daily single diurnal adsorption amount may be determined and then accumulated to determine the total diurnal adsorption amount during the power-on interval.
In some optional embodiments, the control apparatus for a hybrid vehicle may further include a correction module for correcting a 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 the non-electric mode.
Specifically, the ratio of the carbon tank load increment between the time after the carbon tank is desorbed and the current time determined by the carbon tank load model to the carbon tank adsorption increment between the time after the carbon tank is desorbed and the current time determined by the carbon tank adsorption model is used as a correction coefficient, and the day and night adsorption capacity in the carbon tank adsorption model is corrected by using the correction coefficient to realize the correction of the carbon tank adsorption model.
Furthermore, in order to more accurately represent user habits and reduce the waste of computing resources, the carbon tank adsorption model can be corrected under the condition that the latest carbon tank desorption time exceeds the preset time.
Optionally, the correction module may further use the desorbed carbon tank load amount determined by the carbon tank load model as an initial value of the carbon tank adsorption amount after the carbon tank desorption is completed, so as to complete correction of the initial value of the carbon tank adsorption amount of the carbon tank adsorption model.
For the details and advantages of the control device for a hybrid vehicle according to the above embodiment of the present invention, reference may be made to the above description of the control method for a hybrid vehicle according to the present invention, and details are not described herein again.
The embodiment of the invention also provides a hybrid vehicle, which adopts the method for hybrid vehicles in any one of the above embodiments of the invention to control the vehicle to perform desorption treatment on the carbon tank.
The embodiment of the invention also provides a machine-readable storage medium, wherein the machine-readable storage medium is stored with instructions, and the instructions are used for causing a machine to execute the control method for the hybrid vehicle provided by the embodiment of the invention.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and 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 computer storage media 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 that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It is to 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 an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A control method for a hybrid vehicle, characterized by comprising:
when the vehicle is in an electric mode, determining the adsorption capacity of the carbon tank according to a pre-established carbon tank adsorption model; and
and under the condition that the adsorption capacity of the carbon tank is greater than a preset value, switching the electric mode into a hybrid power mode to perform carbon tank desorption.
2. The control method of claim 1, wherein determining the canister adsorption amount from the canister adsorption model comprises:
determining day and night adsorption quantity according to the average ambient temperature, day and night temperature difference, the oil level of an oil tank and the number of days between the electrification of the vehicle all day;
determining the refueling adsorption capacity according to the refueling capacity; and
and determining the adsorption capacity of the carbon tank according to the day and night adsorption capacity and the refueling adsorption capacity.
3. The control method according to claim 2, wherein the determining the diurnal adsorption amount in accordance with the entire-day ambient average temperature, the diurnal temperature difference, the tank oil level, and the number of days between vehicle power-on intervals includes:
determining daily single day and night adsorption quantity according to daily whole day environment average temperature, day and night temperature difference and oil tank oil level; and
determining the diurnal adsorption amount from the daily single diurnal adsorption amount.
4. The control method according to claim 2, characterized in that the method further comprises:
when the vehicle is in a non-electric mode, determining the load capacity of the carbon tank according to a pre-established carbon tank load model; and
and correcting the day and night adsorption amount calculated in the carbon tank adsorption model by taking the carbon tank load amount as a basis.
5. The control method according to claim 4, 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 desorption and the current time according to the carbon canister adsorption model;
determining a carbon tank load increment between the time after the carbon tank is desorbed 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 day and night adsorption amount in the carbon tank adsorption model by using the correction coefficient.
6. The control method according to claim 5, wherein before the correction of the canister adsorption model based on the canister load amount, the method further comprises:
determining the time length between the time after the carbon tank is desorbed and the current time; and
and under the condition that the time length between the carbon tank desorption and the current time exceeds the preset time length, correcting the carbon tank adsorption model.
7. The control method according to claim 4, wherein the correcting the canister adsorption model based on the canister load amount further includes:
and after the carbon tank desorption is finished, taking the desorbed carbon tank load quantity determined by the carbon tank load model as an initial value of the carbon tank adsorption quantity.
8. A control device for a hybrid vehicle, characterized by comprising:
the determining module is used for determining the adsorption capacity of the carbon tank according to a pre-established carbon tank adsorption model when the vehicle is in the electric mode; and
and the switching module is used for switching the electric mode into a hybrid power mode to perform carbon tank desorption under the condition that the adsorption capacity of the carbon tank is greater than a preset value.
9. A machine-readable storage medium having stored thereon instructions for causing a machine to execute the control method for a hybrid vehicle of any one of claims 1-7.
10. A hybrid vehicle characterized in that the hybrid vehicle controls the vehicle to perform desorption processing of a canister by using the control method for a hybrid vehicle according to any one of claims 1 to 7.
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