CN116674523A - Torque distribution method and device for hybrid electric vehicle, vehicle and storage medium - Google Patents
Torque distribution method and device for hybrid electric vehicle, vehicle and storage medium Download PDFInfo
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- CN116674523A CN116674523A CN202310787815.8A CN202310787815A CN116674523A CN 116674523 A CN116674523 A CN 116674523A CN 202310787815 A CN202310787815 A CN 202310787815A CN 116674523 A CN116674523 A CN 116674523A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000010248 power generation Methods 0.000 claims abstract description 83
- 238000004364 calculation method Methods 0.000 claims description 12
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- 230000002035 prolonged effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 4
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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
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
-
- 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
- B60W20/13—Controlling the power contribution of each of the prime movers to meet required power demand in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
-
- 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
-
- 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
- B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
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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
Abstract
The application relates to the technical field of vehicles, in particular to a torque distribution method and device of a hybrid electric vehicle, the vehicle and a storage medium, wherein the hybrid electric vehicle comprises a battery, an engine and a motor, and the method comprises the following steps: acquiring the current state of charge (SOC) of a battery and the current rotating speed of an engine in a parallel mode; determining a power generation demand torque of a motor according to the current SOC and the current rotation speed, and determining a first distribution torque of the engine according to the actual demand torque, an optimal working interval of the engine and/or the power generation demand torque; and determining a second distributed torque of the motor according to the first distributed torque and the actual required torque, and correcting the power generation required torque by using the second distributed torque, or controlling the motor to output the second distributed torque. Therefore, the problems that in the related art, torque in a parallel mode is generally distributed based on the steady-state required torque of an engine, the battery SOC is ignored, the battery electric quantity is too low, the running performance of a vehicle is reduced, the running safety of the vehicle is lowered and the like are solved.
Description
Technical Field
The present application relates to the field of vehicle technologies, and in particular, to a method and an apparatus for torque distribution of a hybrid electric vehicle, a vehicle, and a storage medium.
Background
The modes currently used for the hybrid electric vehicle are a pure electric mode, a series mode and a parallel mode, wherein the parallel mode is a mode that an engine and a motor can simultaneously output torque to drive the vehicle, so how to distribute the torque of the engine and the motor is important.
In the related art, after a vehicle enters a parallel mode, a required torque is obtained through analysis according to the opening degree of an accelerator pedal, an engine steady-state required torque is calculated according to the required torque, the engine steady-state required torque is used as an execution torque of an engine, and a difference value of an actual torque of the engine subtracted from a driver required torque is calculated to determine the torque of a motor, wherein when the difference value is not less than zero, the difference value is used as the execution torque of the motor; and when the difference value is smaller than zero, controlling the motor to enter a power generation mode.
However, when the motor is in a low temperature State, or the SOC (State of Charge) is low, which results in low available capacity of the motor, after determining a working efficient interval of the engine, the torque allocated to the motor may not reach the maximum capacity of the current motor, thereby resulting in capacity loss in driving, and if the battery is not charged in time, excessive consumption of electric quantity may result in battery failure, and the problem that the whole vehicle is under high voltage, driving safety is affected, and the like.
Disclosure of Invention
The application provides a torque distribution method and device of a hybrid electric vehicle, the vehicle and a storage medium, and aims to solve the problems that in the related art, torque in a parallel mode is generally distributed based on steady-state required torque of an engine, and the condition of battery SOC is ignored, so that the battery power is easily too low, the running performance and running safety of the vehicle are reduced, and the like.
An embodiment of a first aspect of the present application provides a torque distribution method of a hybrid electric vehicle, wherein the hybrid electric vehicle includes a battery, an engine, and a motor, and the method includes the steps of: acquiring the current state of charge (SOC) of a battery and the current rotating speed of an engine in a parallel mode; determining a power generation demand torque of the motor according to a current SOC and the current rotation speed, and determining a first distribution torque of the engine according to an actual demand torque and an optimal working interval of the engine and/or the power generation demand torque; and determining a second distribution torque of the motor according to the first distribution torque and the actual demand torque, and correcting the power generation demand torque by utilizing the second distribution torque, or controlling the motor to output the second distribution torque.
Optionally, in one embodiment of the present application, the determining the power generation demand torque of the motor according to the current SOC and the current rotation speed includes: inquiring a preset torque table by taking the current SOC and the current rotating speed as indexes to obtain the primary power generation demand torque of the motor; and taking the minimum value of the preliminary power generation required torque, the torque corresponding to the maximum charging power of the battery and the maximum driving torque of the motor as the final power generation required torque of the motor.
Optionally, in one embodiment of the present application, the determining the first distributed torque of the engine according to the actual required torque and the optimal working interval of the engine, and/or the power generation required torque includes: if the actual required torque is smaller than the upper limit value of the optimal working interval, determining a first distributed torque of the engine according to the actual required torque, the upper limit value and the power generation required torque; and if the actual required torque is greater than or equal to the upper limit value, determining a first distribution torque of the engine according to the actual required torque and the upper limit value.
Optionally, in one embodiment of the present application, the determining the first distributed torque of the engine according to the actual required torque, the upper limit value and the power generation required torque includes: determining a minimum first torque of the power generation demand torque and the maximum driving torque of the motor; and summing the first torque and the actual required torque to obtain a second torque, and taking the minimum value of the second torque and the upper limit value as the first distribution torque.
Optionally, in one embodiment of the present application, the determining the first distributed torque of the engine according to the actual required torque and the upper limit value includes: and performing difference calculation on the actual required torque and the maximum driving torque of the motor to obtain a third torque, and taking the maximum value of the third torque and the upper limit value as the first distribution torque.
An embodiment of a second aspect of the present application provides a torque distribution device for a hybrid vehicle, wherein the hybrid vehicle includes a battery, an engine, and a motor, and the device includes: the acquisition module is used for acquiring the current state of charge (SOC) of the battery and the current rotating speed of the engine in the parallel mode; the determining module is used for determining the power generation required torque of the motor according to the current SOC and the current rotating speed; the distribution module is used for determining a first distribution torque of the engine according to the actual required torque and the optimal working interval of the engine and/or the power generation required torque, determining a second distribution torque of the motor according to the first distribution torque and the actual required torque, and correcting the power generation required torque by utilizing the second distribution torque or controlling the motor to output the second distribution torque.
Optionally, in one embodiment of the present application, the determining module is configured to: inquiring a preset torque table by taking the current SOC and the current rotating speed as indexes to obtain the primary power generation demand torque of the motor; and taking the minimum value of the preliminary power generation required torque, the torque corresponding to the maximum charging power of the battery and the maximum driving torque of the motor as the final power generation required torque of the motor.
Optionally, in one embodiment of the present application, the allocation module is configured to: if the actual required torque is smaller than the upper limit value of the optimal working interval, determining a first distributed torque of the engine according to the actual required torque, the upper limit value and the power generation required torque; and if the actual required torque is greater than or equal to the upper limit value, determining a first distribution torque of the engine according to the actual required torque and the upper limit value.
Optionally, in one embodiment of the present application, the allocation module is further configured to: determining a minimum first torque of the power generation demand torque and the maximum driving torque of the motor; and summing the first torque and the actual required torque to obtain a second torque, and taking the minimum value of the second torque and the upper limit value as the first distribution torque.
Optionally, in one embodiment of the present application, the allocation module is further configured to: and performing difference calculation on the actual required torque and the maximum driving torque of the motor to obtain a third torque, and taking the maximum value of the third torque and the upper limit value as the first distribution torque.
An embodiment of a third aspect of the present application provides a hybrid vehicle, including: battery, engine and motor; the hybrid power controller is used for acquiring the current state of charge (SOC) of the battery and the current rotating speed of the engine in the parallel mode; determining a power generation demand torque of the motor according to a current SOC and the current rotation speed, and determining a first distribution torque of the engine according to an actual demand torque and an optimal working interval of the engine and/or the power generation demand torque; and determining a second distribution torque of the motor according to the first distribution torque and the actual demand torque, and correcting the power generation demand torque by utilizing the second distribution torque, or controlling the motor to output the second distribution torque.
An embodiment of a fourth aspect of the present application provides a computer-readable storage medium having stored thereon a computer program that is executed by a processor for implementing the torque distribution method of a hybrid vehicle as described in the above embodiment.
Therefore, the application has at least the following beneficial effects:
according to the embodiment of the application, the torque of the motor and the torque of the engine in the parallel mode can be distributed according to the SOC of the battery and the optimal working interval of the engine, and the conditions of faults and the like of the vehicle caused by the too low electric quantity of the battery can be avoided due to consideration of the SOC, so that the service life and the endurance mileage of the battery can be prolonged, and the running performance and the running safety of the vehicle can be improved; meanwhile, the optimal working range of the engine is considered, so that the working efficiency of the engine can be improved, the endurance mileage can be prolonged, and energy conservation and emission reduction can be realized.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a hybrid project P2 powertrain solution provided in accordance with an embodiment of the present application;
fig. 2 is a flowchart of a torque distribution method of a hybrid vehicle according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an engine optimal operating region provided in accordance with an embodiment of the present application;
FIG. 4 is a graph of an example of engine torque calculation provided in accordance with an embodiment of the present disclosure;
FIG. 5 is a graph of an exemplary calculation of engine torque provided in accordance with one embodiment of the present disclosure;
FIG. 6 is a graph illustrating an example of engine torque calculation provided in accordance with another embodiment of the present application;
fig. 7 is a block schematic diagram of a torque distribution device of a hybrid electric vehicle according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
As shown in fig. 1, the powertrain of a hybrid vehicle may include a hybrid engine system, a P2 module, a hybrid transmission system, an ISG (Integrated Starter Generator, motor controller), and an HCU (Hybrid Control Unit, hybrid controller). When the vehicle is in the parallel mode, the clutch is closed, and power is transmitted to wheels through the engine, the clutch, the motor, the gearbox and the wheels, so that the vehicle can run.
Based on the system shown in fig. 1, the embodiment of the application provides a torque distribution method of a hybrid electric vehicle, and the torque distribution method of the hybrid electric vehicle will be described with reference to fig. 2.
As shown in fig. 2, the torque distribution method of the hybrid vehicle includes the steps of:
in step S101, the current SOC of the battery and the current rotation speed of the engine in the parallel mode are acquired.
It may be appreciated that, in the embodiment of the present application, the SOC of the battery and the current rotation speed of the engine in the parallel mode of the hybrid electric vehicle may be obtained in various manners, for example, the SOC and the current rotation speed may be obtained by a sensor or the like, which is not limited in particular.
In step S102, the power generation demand torque of the motor is determined based on the current SOC and the current rotation speed.
It will be appreciated that the power generation demand torque refers to the torque required by the motor to generate power, and if the power generation demand torque is greater than 0, it indicates that the battery needs to be charged, and if the power generation demand torque is less than 0, it indicates that the battery does not need to be charged, and the torque can be output through the motor.
In an embodiment of the present application, determining a power generation demand torque of a motor according to a current SOC and a current rotational speed includes: and inquiring a preset torque table by taking the current SOC and the current rotating speed as indexes to obtain the preliminary power generation required torque of the motor, and taking the minimum value of the torque corresponding to the maximum charging power of the battery and the maximum driving torque of the motor as the final power generation required torque of the motor according to the preliminary power generation required torque.
The preset torque table may be calibrated in advance, and is not limited specifically.
It can be understood that the embodiment of the application can obtain the preliminary power generation required torque of the motor through table lookup based on the current SOC and the current rotating speed, and compare the preliminary power generation required torque with the torque corresponding to the maximum charging power of the battery and the maximum driving torque of the motor to obtain the minimum value together to determine the final power generation required torque.
Taking the preset torque table shown in table 1 as an example, after the vehicle enters the parallel mode, the embodiment of the application can preliminarily determine the motor power generation required torque according to the current SOC of the battery and the engine speed, wherein table 1 is the preset torque table.
TABLE 1
The method and the device can further distribute the motor charging demand torque through the maximum capacities of the battery and the motor, if the maximum capacities of the battery and the motor are not exceeded, the initial distribution torque of the motor is the torque obtained through table 1 lookup, otherwise, the table 1 lookup is limited through the maximum capacities of the battery and the motor, and the motor power generation demand torque is expressed as follows:
TISGGeTqReq＝Min(TBatToISGTqMax,TISGTqMax,TISGGeTqInit)
where TISGTqMax represents the maximum capacity of the battery, TISGTqMax represents the maximum capacity of the motor, and tistgetqinit represents the initial state of the motor that requires power generation according to the vehicle state.
In step S103, a first distributed torque of the engine is determined according to the actual required torque and the optimal working interval of the engine, and/or the power generation required torque, a second distributed torque of the motor is determined according to the first distributed torque and the actual required torque, and the power generation required torque is corrected by using the second distributed torque, or the motor is controlled to output the second distributed torque.
The optimal operation interval of the motor is shown in fig. 3, in which two curves of the motor optimal operation upper limit tengcouptllmt and the motor optimal operation lower limit tengcodownlmt are marked, respectively. The actual required torque can be calculated according to the wheel end required torque.
It can be understood that the embodiment of the application can determine the torque of the engine by primarily distributing the motor torque, confirm the distributed torque of the engine, confirm whether the engine is in the optimal working interval of the engine, and then distribute the torque based on one or more of the actual required torque, the optimal working interval of the engine and the power generation required torque, and as the condition of SOC is considered, the condition that the vehicle is out of order due to the too low electric quantity of the battery can be avoided, the service life and the endurance mileage of the battery can be prolonged, and the running performance and the running safety of the vehicle are improved; meanwhile, the optimal working range of the engine is considered, so that the working efficiency of the engine can be improved, the endurance mileage can be prolonged, and energy conservation and emission reduction can be realized.
In an embodiment of the present application, determining a first distributed torque of an engine according to an actual required torque and an optimal working interval of the engine, and/or a power generation required torque includes: if the actual required torque is smaller than the upper limit value of the optimal working interval, determining a first distributed torque of the engine according to the actual required torque, the upper limit value and the power generation required torque; and if the actual required torque is greater than or equal to the upper limit value, determining a first distributed torque of the engine according to the actual required torque and the upper limit value.
It can be understood that the embodiment of the application can determine the distribution mode of the torque in the parallel mode according to the actual required torque, can distribute the torque according to the power generation required torque, the optimal working interval of the engine and the actual capacity of the motor when the actual required torque is smaller or common, and can distribute the torque according to the optimal working interval of the engine and the actual capacity of the motor when the actual required torque is larger.
In an embodiment of the present application, determining a first distributed torque of an engine according to an actual required torque, an upper limit value, and a power generation required torque includes: determining a minimum first torque of the power generation demand torque and the maximum driving torque of the motor; and summing the first torque and the actual required torque to obtain a second torque, and taking the minimum value of the second torque and the upper limit value as the first distributed torque.
It can be understood that the embodiment of the application can distribute the torque of the engine in the same calculation mode when the actual required torque is smaller or in general, and determine the actual working interval of the engine according to the actual required torque when the actual required torque is calculated.
Taking the best operation interval of the engine shown in fig. 3 as an example, the best operation interval may be divided into a plurality of intervals, and the torque distribution strategy when the actual required torque is small or general is as follows:
1. when the actual required torque is smaller
When TWhlTrq2Eng < tengcodownlmt, i.e. the wheel end demand torque (smaller) is in interval a, the motor works in the a or B region according to the motor capacity and the power generation demand of the battery, the embodiment of the present application can calculate the distribution torque of the motor by using the calculation method shown in fig. 4, where TMotGenTqLimt2Eng represents the maximum capacity of the motor, TWhlTrq2Eng represents the demand torque of the wheel end is reduced to the demand torque of the motor end output, tengcouptlmt represents the optimum operation upper limit of the motor.
a. If the battery needs to generate larger energy, the working point of the engine does not exceed the optimal upper limit tengcoeuplmt;
b. if the battery needs larger power generation energy and the motor capacity is small, the working point of the engine does not exceed the area A or the area B;
c. if the battery needs smaller power generation energy and the motor capacity is small, the working point of the engine is in the area A.
2. When the actual torque is generally required
When tengcecodownlmt < TWhlTrq2Eng < tengcouplm, that is, the wheel end demand torque is in the interval B, the engine is operated in the B region (the optimum operation interval), and the engine optimum operation upper limit is not exceeded, the embodiment of the present application can calculate the distribution torque of the engine according to the calculation manner shown in fig. 5.
In an embodiment of the present application, determining a first distributed torque of an engine according to an actual required torque and an upper limit value includes: and performing difference calculation on the actual required torque and the maximum driving torque of the motor to obtain a third torque, and taking the maximum value of the third torque and the upper limit value as the first distribution torque.
It can be understood that when the actual torque demand is larger, the embodiment of the application can increase the distribution torque of the engine, and the engine preferentially works at the optimal upper economic limit, thereby meeting the actual torque demand of the vehicle and ensuring the power output of the vehicle while improving the working efficiency of the engine.
Taking the best operation interval of the engine shown in fig. 3 as an example, the best operation interval may be divided into a plurality of intervals, and the torque distribution strategy when the actual required torque is large is as follows:
when tengcouplmt < TWhlTrq2Eng, i.e. the wheel end demand torque (greater) is in interval C, the motor is preferentially operating at the optimum upper economic limit, the remaining demand torque is supplemented by the motor, wherein the implementation of the application can determine the engine split torque by calculation as shown in fig. 6.
After determining the final motor torque from the final requested torque of the engine, the motor demand torque is calculated as:
TISGReq＝TWhlTrq2Eng-TEngReq，
where TWhlTrq2Eng represents a torque demand at the wheel end converted to a torque demand at the engine end, tiggsreq represents a torque demand at the motor, tengseq represents a torque demand at the engine end.
According to the torque distribution method of the hybrid electric vehicle, which is provided by the embodiment of the application, the torques of the motor and the engine in the parallel mode are distributed according to the SOC of the battery and the optimal working interval of the engine, and the conditions of faults and the like of the vehicle caused by the too low electric quantity of the battery can be avoided due to the consideration of the SOC, so that the service life and the endurance mileage of the battery can be prolonged, and the running performance and the running safety of the vehicle are improved; meanwhile, the optimal working range of the engine is considered, so that the working efficiency of the engine can be improved, the endurance mileage can be prolonged, and energy conservation and emission reduction can be realized.
Next, a torque distribution device of a hybrid vehicle according to an embodiment of the present application will be described with reference to the accompanying drawings.
Fig. 7 is a block schematic diagram of a torque distribution device of a hybrid vehicle according to an embodiment of the present application.
As shown in fig. 7, the torque distribution device 10 of the hybrid vehicle includes: the system comprises an acquisition module 100, a determination module 200 and an allocation module 300.
The acquiring module 100 is configured to acquire a current state of charge SOC of the battery and a current rotational speed of the engine in the parallel mode; a determining module 200 for determining a power generation demand torque of the motor according to the current SOC and the current rotational speed; the distribution module 300 is configured to determine a first distribution torque of the engine according to the actual required torque and an optimal working interval of the engine, and/or the power generation required torque, determine a second distribution torque of the motor according to the first distribution torque and the actual required torque, and correct the power generation required torque by using the second distribution torque, or control the motor to output the second distribution torque.
Optionally, in one embodiment of the present application, the determining module 200 is configured to: inquiring a preset torque table by taking the current SOC and the current rotating speed as indexes to obtain the primary power generation demand torque of the motor; and taking the minimum value of the initial power generation required torque, the torque corresponding to the maximum charging power of the battery and the maximum driving torque of the motor as the final power generation required torque of the motor.
Optionally, in one embodiment of the present application, the allocation module 300 is configured to: if the actual required torque is smaller than the upper limit value of the optimal working interval, determining a first distributed torque of the engine according to the actual required torque, the upper limit value and the power generation required torque; and if the actual required torque is greater than or equal to the upper limit value, determining a first distributed torque of the engine according to the actual required torque and the upper limit value.
Optionally, in one embodiment of the present application, the allocation module 300 is further configured to: determining a minimum first torque of the power generation demand torque and the maximum driving torque of the motor; and summing the first torque and the actual required torque to obtain a second torque, and taking the minimum value of the second torque and the upper limit value as the first distributed torque.
Optionally, in one embodiment of the present application, the allocation module 300 is further configured to: and performing difference calculation on the actual required torque and the maximum driving torque of the motor to obtain a third torque, and taking the maximum value of the third torque and the upper limit value as the first distribution torque.
It should be noted that the foregoing explanation of the embodiment of the torque distribution method of the hybrid vehicle is also applicable to the torque distribution device of the hybrid vehicle of this embodiment, and will not be repeated here.
According to the torque distribution device of the hybrid electric vehicle, which is provided by the embodiment of the application, the torques of the motor and the engine in the parallel mode are distributed according to the SOC of the battery and the optimal working interval of the engine, and the conditions of faults and the like of the vehicle caused by the too low electric quantity of the battery can be avoided due to the consideration of the SOC, so that the service life and the endurance mileage of the battery can be prolonged, and the running performance and the running safety of the vehicle are improved; meanwhile, the optimal working range of the engine is considered, so that the working efficiency of the engine can be improved, the endurance mileage can be prolonged, and energy conservation and emission reduction can be realized.
In addition, the embodiment of the application also provides a hybrid electric vehicle, which comprises: battery, engine and motor.
The hybrid power controller is used for acquiring the current state of charge (SOC) of the battery and the current rotating speed of the engine in a parallel mode; determining a power generation demand torque of a motor according to the current SOC and the current rotation speed, and determining a first distribution torque of the engine according to the actual demand torque, an optimal working interval of the engine and/or the power generation demand torque; and determining a second distributed torque of the motor according to the first distributed torque and the actual required torque, and correcting the power generation required torque by using the second distributed torque, or controlling the motor to output the second distributed torque.
The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the torque distribution method of the hybrid electric vehicle as above.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable gate arrays, field programmable gate arrays, and the like.
Those of ordinary skill in the art will appreciate that all or part of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, where the program when executed includes one or a combination of the steps of the method embodiments.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (10)
1. A torque distribution method of a hybrid vehicle, characterized in that the hybrid vehicle comprises a battery, an engine and a motor, wherein the method comprises the steps of:
acquiring the current state of charge (SOC) of a battery and the current rotating speed of an engine in a parallel mode;
determining a power generation demand torque of the motor according to the current SOC and the current rotation speed;
and determining a first distribution torque of the engine according to the actual required torque and the optimal working interval of the engine and/or the power generation required torque, determining a second distribution torque of the motor according to the first distribution torque and the actual required torque, and correcting the power generation required torque by using the second distribution torque or controlling the motor to output the second distribution torque.
2. The torque distribution method of a hybrid vehicle according to claim 1, wherein the determining the power generation demand torque of the motor according to the current SOC and the current rotation speed includes:
inquiring a preset torque table by taking the current SOC and the current rotating speed as indexes to obtain the primary power generation demand torque of the motor;
and taking the minimum value of the preliminary power generation required torque, the torque corresponding to the maximum charging power of the battery and the maximum driving torque of the motor as the final power generation required torque of the motor.
3. The torque distribution method of a hybrid vehicle according to claim 1, wherein the determining the first distributed torque of the engine according to the actual required torque and the optimal operation interval of the engine, and/or the power generation required torque, includes:
if the actual required torque is smaller than the upper limit value of the optimal working interval, determining a first distributed torque of the engine according to the actual required torque, the upper limit value and the power generation required torque;
and if the actual required torque is greater than or equal to the upper limit value, determining a first distribution torque of the engine according to the actual required torque and the upper limit value.
4. The torque distribution method of a hybrid vehicle according to claim 3, characterized in that the determining the first distributed torque of the engine based on the actual required torque, the upper limit value, and the power generation required torque includes:
determining a minimum first torque of the power generation demand torque and the maximum driving torque of the motor;
and summing the first torque and the actual required torque to obtain a second torque, and taking the minimum value of the second torque and the upper limit value as the first distribution torque.
5. The torque distribution method of a hybrid vehicle according to claim 3, characterized in that the determining the first distributed torque of the engine according to the actual required torque and the upper limit value includes:
and performing difference calculation on the actual required torque and the maximum driving torque of the motor to obtain a third torque, and taking the maximum value of the third torque and the upper limit value as the first distribution torque.
6. A torque distribution device of a hybrid vehicle, characterized in that the hybrid vehicle comprises a battery, an engine and a motor, wherein the device comprises:
the acquisition module is used for acquiring the current state of charge (SOC) of the battery and the current rotating speed of the engine in the parallel mode;
the determining module is used for determining the power generation required torque of the motor according to the current SOC and the current rotating speed;
the distribution module is used for determining a first distribution torque of the engine according to the actual required torque and the optimal working interval of the engine and/or the power generation required torque, determining a second distribution torque of the motor according to the first distribution torque and the actual required torque, and correcting the power generation required torque by utilizing the second distribution torque or controlling the motor to output the second distribution torque.
7. The torque distribution device of a hybrid vehicle according to claim 6, wherein the determination module is configured to:
inquiring a preset torque table by taking the current SOC and the current rotating speed as indexes to obtain the primary power generation demand torque of the motor;
and taking the minimum value of the preliminary power generation required torque, the torque corresponding to the maximum charging power of the battery and the maximum driving torque of the motor as the final power generation required torque of the motor.
8. The torque distribution device of a hybrid vehicle according to claim 6, wherein the distribution module is configured to:
if the actual required torque is smaller than the upper limit value of the optimal working interval, determining a first distributed torque of the engine according to the actual required torque, the upper limit value and the power generation required torque;
and if the actual required torque is greater than or equal to the upper limit value, determining a first distribution torque of the engine according to the actual required torque and the upper limit value.
9. A hybrid vehicle characterized by comprising:
battery, engine and motor;
the hybrid power controller is used for acquiring the current state of charge (SOC) of the battery and the current rotating speed of the engine in the parallel mode; determining a power generation demand torque of the motor according to a current SOC and the current rotation speed, and determining a first distribution torque of the engine according to an actual demand torque and an optimal working interval of the engine and/or the power generation demand torque; and determining a second distribution torque of the motor according to the first distribution torque and the actual demand torque, and correcting the power generation demand torque by utilizing the second distribution torque, or controlling the motor to output the second distribution torque.
10. A computer-readable storage medium having stored thereon a computer program, characterized in that the program is executed by a processor for realizing the torque distribution method of a hybrid vehicle according to any one of claims 1 to 5.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117416341A (en) * | 2023-12-18 | 2024-01-19 | 江苏速豹动力科技有限公司 | Torque distribution method, device, system and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117416341A (en) * | 2023-12-18 | 2024-01-19 | 江苏速豹动力科技有限公司 | Torque distribution method, device, system and storage medium |
| CN117416341B (en) * | 2023-12-18 | 2024-03-15 | 江苏速豹动力科技有限公司 | Torque distribution method, device, system and storage medium |
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