CN112124316B - Method and device for determining torque limit value - Google Patents

Method and device for determining torque limit value Download PDF

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Publication number
CN112124316B
CN112124316B CN201910554355.8A CN201910554355A CN112124316B CN 112124316 B CN112124316 B CN 112124316B CN 201910554355 A CN201910554355 A CN 201910554355A CN 112124316 B CN112124316 B CN 112124316B
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vehicle
maximum power
value
determining
power value
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CN112124316A (en
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马东辉
魏强
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Beijing CHJ Automotive Information Technology Co Ltd
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Beijing CHJ Automotive Information Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/06—Combustion engines, Gas turbines
    • B60W2510/0666—Engine power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/08—Electric propulsion units
    • B60W2510/085—Power
    • 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
    • Y02T10/72—Electric energy management in electromobility

Abstract

The invention discloses a method and a device for determining a torque limit value, which are applied to a range extender vehicle, wherein the method comprises the steps of determining the maximum power generation power value of a range extender and the maximum discharge power value of a battery; and calculating to obtain a torque limit value of the vehicle based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery. The method and the device for determining the torque limit value can reduce the limit of the torque limit value on the required torque and improve the dynamic performance of the vehicle.

Description

Method and device for determining torque limit value
Technical Field
The invention relates to the field of vehicles, in particular to a method and a device for determining a torque limit value.
Background
The range-extended electric vehicle is an electric vehicle which uses other energy sources (such as gasoline) to supply electric energy under the condition that the electric quantity of a battery is exhausted. The main working characteristics are that the electric vehicle works in an electric pure mode under most conditions, works in a range extending mode under few conditions, and the range extender generates electric energy to drive the motor or charge a battery under the range extending mode.
In the prior art, the torque limit value is calculated based on the current power generation power value of the range extender and the maximum power value of the battery. However, in the actual driving process of the vehicle, if the battery discharge power of the range-extended electric vehicle is relatively small and the opening degree of the accelerator pedal is relatively small, so that the calculated torque limit value is also very small when the power generated by the range extender is very small, thereby limiting the increase of the required torque of the vehicle under the vehicle condition and reducing the power performance of the vehicle.
Disclosure of Invention
The embodiment of the invention provides a method and a device for determining a torque limit value, and aims to solve the problems that when the power generation power of a range extender is small, the calculated torque limit value is also small, so that the improvement of the required torque of a vehicle under the vehicle condition is limited, and the power performance of the vehicle is reduced.
In a first aspect, an embodiment of the present invention provides a method for determining a torque limit value, which is applied to an extended range vehicle, and includes:
determining the maximum power generation power value of the range extender and the maximum discharge power value of the battery;
and calculating to obtain a torque limit value of the vehicle based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery.
Optionally, the step of determining the maximum power generation power value of the range extender includes:
determining a maximum power value output by the engine and a maximum power value output by the generator;
and taking the power value with the smaller numerical value in the maximum power value output by the engine and the maximum power value output by the generator as the maximum power generation power value of the range extender.
Optionally, the step of determining a maximum power value of the engine output comprises:
acquiring the altitude of the vehicle and the temperature value of cooling liquid in the vehicle;
determining a maximum power value output by an engine based on an altitude at which the vehicle is located and a temperature value of a cooling fluid in the vehicle.
Optionally, the step of determining a maximum power value of the engine output comprises:
acquiring a driving parameter of the vehicle, wherein the driving parameter comprises at least one of a vehicle speed and an acceleration of the vehicle;
the maximum power output by the engine is determined based on the driving parameter.
Optionally, in a case where the driving parameter includes acceleration, the step of determining the maximum power output of the engine based on the driving parameter includes:
determining a maximum power output by the engine based on the acceleration, wherein the maximum power output by the engine is proportional to the acceleration.
Optionally, in a case where the driving parameter includes a vehicle speed, the determining of the maximum power output by the engine based on the driving parameter includes:
determining a maximum power output by an engine based on the vehicle speed, wherein the maximum power output by the engine is proportional to the vehicle speed.
In a second aspect, an embodiment of the present invention further provides a device for determining a torque limit value, which is applied to an extended range vehicle, and is characterized by including:
the determining module is used for determining the maximum power generation power value of the range extender and the maximum discharge power value of the battery;
and the calculation module is used for calculating to obtain a torque limit value of the vehicle based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery.
Optionally, the determining module includes:
a determination submodule for determining a maximum power value output by the engine and a maximum power value output by the generator;
and the setting submodule is used for taking the power value with the smaller numerical value in the maximum power value output by the engine and the maximum power value output by the generator as the maximum power generation power value of the range extender.
Optionally, the determining sub-module includes:
the first acquisition unit is used for acquiring the altitude of the vehicle and the temperature value of the cooling liquid in the vehicle;
a first determination unit for determining a maximum power value output by an engine based on an altitude at which the vehicle is located and a temperature value of a cooling liquid in the vehicle.
Optionally, the determining sub-module includes:
a second acquisition unit configured to acquire a driving parameter of the vehicle, wherein the driving parameter includes at least one of a vehicle speed and an acceleration of the vehicle;
a second determination unit for determining a maximum power output of the engine based on the running parameter.
Optionally, in a case where the running parameter includes an acceleration, the second determination unit is further configured to determine a maximum power output by the engine based on the acceleration, wherein the maximum power output by the engine is proportional to the acceleration.
Optionally, in a case that the driving parameter includes a vehicle speed, the second determining unit is further configured to determine a maximum power output by the engine based on the vehicle speed, wherein the maximum power output by the engine is proportional to the vehicle speed.
In a third aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements the steps of the method for determining a torque limit value as described above when executing the computer program.
In a fourth aspect, the embodiment of the present invention further provides a vehicle, where the vehicle is an extended range electric vehicle, and the vehicle includes the electronic device as described above.
In a fifth aspect, the embodiments further provide a computer readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the torque limit determination method as described above.
In the embodiment of the invention, the torque limit value is calculated based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery, compared with the torque limit value calculated based on the current power generation power of the range extender and the maximum discharge power value of the battery in the prior art, the torque limit value can be improved, the condition that the torque limit value is small to limit the required torque due to the vehicle condition of the vehicle is avoided, the limitation of the torque limit value on the required torque can be further reduced, and the power performance of the vehicle is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a flow chart of a method of determining a torque limit provided by one embodiment of the present invention;
FIG. 2 is a flow chart of a method of determining a torque limit provided by another embodiment of the present invention;
FIG. 3 is a schematic diagram of an apparatus for determining a torque limit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a torque limit determination apparatus according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a torque limit determination apparatus according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a torque limit determining apparatus according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for determining a torque limit according to an embodiment of the invention. The embodiment of the invention provides a method for determining a torque limit value, which is applied to a range-extended vehicle and comprises the following steps:
step 101: determining the maximum power generation power value of the range extender and the maximum discharge power value of the battery;
the range extender is a generator set and consists of an engine and a generator, and can automatically start and output voltage and current required by electric drive or stop the vehicle according to factors such as the running state of the vehicle, the running road condition, the battery electric quantity and the like in the running process of the vehicle, for example: when the electric quantity of the battery of the vehicle is lower than 60% and the electric quantity consumed by the vehicle is too large, such as acceleration or climbing, the range extender is started automatically; the range extender may also be a voltage and current required to start outputting the electric drive or a shutdown after receiving a control command.
The power generation power value of the range extender is changed according to the vehicle requirement, such as: the power generated by the range extender during the driving of the vehicle may be proportional to the opening degree of the accelerator pedal. The maximum generating power of the range extender is constant, and the maximum generating power of the range extender can be directly detected by the power analyzer under the condition of fully using the range extender. Of course, the maximum generated power of the range extender may be determined in other ways, and is not limited herein.
The maximum discharge power value of the battery may be the maximum discharge power of the battery calculated by the battery management system in real time according to the current state of the battery (referring to the battery temperature, the battery capacity, and other factors). For example, after the battery temperature value and the battery electric quantity value are detected, the maximum discharge power value of the battery may be determined by referring to a preset table, where the preset table includes maximum discharge powers of batteries corresponding to different battery temperature values and different battery electric quantity values. Of course, the maximum discharge power of the battery may also be determined in other ways, such as: the Controller Area Network (CAN) bus is detected by a signal sent by a BATTERY management unit (BATTERY MANAGEMENT SYSTEM, BMS), and is not limited herein.
Step 102: and calculating to obtain a torque limit value of the vehicle based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery.
In the case that the range extender is turned on while the vehicle is running, the range extender and the battery jointly supply energy to the electric motor of the vehicle, so the maximum power generation power value of the range extender and the maximum discharge power value of the battery can be used as parameters for calculating the torque limit value of the vehicle.
The torque limit may be calculated with reference to a torque calculation formula, namely: t is a unit of max ＝P General assembly X 9550/N, wherein, T max Is the torque limit, P General assembly And calculating the torque limit value of the vehicle by taking the maximum power generation power value of the range increaser and the maximum discharge power value of the battery as N is the rotating speed of the motor of the vehicle. Of course, the torque limit may be calculated in other ways, and is not limited herein.
In the embodiment of the invention, the torque limit value is calculated based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery, compared with the torque limit value calculated based on the current power generation power of the range extender and the maximum discharge power value of the battery in the prior art, the torque limit value can be improved, the situation that the torque limit value is very small to limit the required torque due to the vehicle condition of the vehicle is avoided, the limitation of the torque limit value on the required torque is further reduced, and the power performance of the vehicle is improved.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for determining a torque limit according to another embodiment of the present invention. As shown in fig. 2, the method comprises the following steps:
step 201: a maximum power value for the engine output and a maximum power value for the generator output are determined.
The range extender comprises an engine and a generator, wherein the maximum power value which can be output by the engine can be the maximum power value corresponding to the type of the engine which forms the range extender, and the power of the engine of the range extender in the electric automobile is in the range of 15-20KW generally; or calculated by the maximum rotation speed and the maximum torque of the engine. Similarly, the maximum power value output by the generator may be the maximum power value corresponding to the model of the generator constituting the range extender; it can also be calculated by the following formula: p is UICos Φ, where U is an effective voltage value, I is an effective current value, and Φ is a phase difference between the voltage and current signals.
In an alternative embodiment, the step of determining the maximum power value of the engine output comprises:
acquiring the altitude of the vehicle and the temperature value of cooling liquid in the vehicle;
determining a maximum power output of an engine based on an altitude at which the vehicle is located and a temperature value of a cooling fluid in the vehicle.
The altitude of the vehicle can be obtained through an altitude detector; the altitude of the vehicle can be calculated by detecting the atmospheric pressure of the environment of the vehicle; the altitude of the vehicle can also be obtained by obtaining the geographic coordinates where the vehicle is located and combining a map model with the altitude, wherein the map model with the altitude comprises each geographic coordinate and the altitude corresponding to the geographic coordinate. The specific manner of calculating the altitude of the vehicle is not limited herein.
The temperature value of the cooling liquid in the vehicle can be obtained by a thermometer in contact with the cooling liquid; the temperature of the cooling liquid may be sensed by a noncontact temperature sensor. The manner in which the temperature value of the cooling fluid in the vehicle is calculated is not limited herein.
In the present embodiment, a first mapping relationship is further included to determine the maximum power value output by the engine, where the first mapping relationship includes the maximum power value of the vehicle engine under different altitude values and different temperature values of the coolant.
After the altitude value of the vehicle and the temperature value of the cooling liquid in the vehicle are obtained, the maximum power value output by the engine can be uniquely determined by means of the first mapping relation.
In the present embodiment, the altitude at which the vehicle is located and the temperature value of the coolant in the vehicle are taken into consideration in determining the maximum power value of the engine output, so that the maximum power value of the engine output more suitable for the actual situation can be determined.
It should be noted that the altitude of the vehicle and the temperature value of the cooling liquid in the vehicle are obtained; determining a maximum power output of an engine based on an altitude at which the vehicle is located and a temperature value of a cooling fluid in the vehicle. The same applies to the embodiment shown in fig. 1, and can achieve the same technical effect, which is not described herein again.
In another alternative embodiment, the step of determining a maximum power value for engine output comprises:
acquiring a driving parameter of the vehicle, wherein the driving parameter comprises at least one of a vehicle speed and an acceleration of the vehicle;
the maximum power output by the engine is determined based on the running parameter.
Namely, three possibilities exist for the driving parameters, namely, the acceleration is included, and the vehicle speed is not included; secondly, the vehicle speed is included, and acceleration is not included; and thirdly, including acceleration and vehicle speed.
The above acceleration may be a manner of detecting an opening degree of an accelerator pedal as the acceleration of the vehicle, and a larger opening degree of the accelerator pedal indicates a larger acceleration of the vehicle, and a smaller opening degree of the accelerator pedal indicates a smaller acceleration of the vehicle.
The opening degree of the accelerator pedal and the acceleration can be in a linear relation, namely the acceleration corresponding to 2 times of the opening degree is 2 times of the acceleration corresponding to 1 time of the opening degree; the opening of the accelerator pedal may also be exponentially related to the acceleration, for example: the acceleration corresponding to 2 times the opening is the square of the acceleration corresponding to 1 time the opening.
Of course, the acceleration may also be calculated by the difference between the rotational speeds at two time points and the time difference between the two time points, and the specific manner in which the acceleration of the vehicle is determined is not limited herein.
The vehicle speed may be detected by a vehicle speed meter, or may be calculated according to a position moving distance of a GPS in the vehicle within a period of time, where the specific manner of determining the vehicle speed is not limited.
The driving parameters may be used as a reference for the user's acceptance of Noise, Vibration and Harshness (NVH) performance of the vehicle, for example: the noise and vibration of the motor are inevitably increased when the vehicle is accelerated, and the user can be considered to have higher acceptance degree on the NVH performance; when the vehicle runs at a low speed, the noise and vibration of the vehicle are low, and the user may be considered to have low NVH acceptance.
After the driving parameters are obtained, the maximum power output by the engine is determined based on the driving parameters, namely, the maximum power output by the engine is determined according to the current NVH acceptance degree of the user. Specifically, when the user has a high acceptance degree of the NVH, the engine can output a high power within the user acceptance degree, and the maximum power output by the engine is high at this time; when the user has a low degree of acceptance of the NVH, the power value output by the engine within the degree of acceptance of the user is lower, and the maximum power output by the engine is lower at the moment.
Therefore, when the running parameter is a condition including acceleration, the step of determining the maximum power output of the engine based on the running parameter may be considered as: determining a maximum power output by the engine based on the acceleration, wherein the maximum power output by the engine is proportional to the acceleration.
When the running parameter includes a vehicle speed, the step of determining the maximum power output of the engine based on the running parameter may be considered as: determining a maximum power output by an engine based on the vehicle speed, wherein the maximum power output by the engine is proportional to the vehicle speed.
Step 202: and taking the power value with the smaller numerical value in the maximum power value output by the engine and the maximum power value output by the generator as the maximum power generation power value of the range extender.
The engine in the range extender drives the generator to work so as to charge the battery and realize continuous endurance, so that the power value with the smaller numerical value in the maximum power value output by the engine and the maximum power value output by the generator is the actual maximum power generation power value of the range extender.
In the present embodiment, the maximum power value of the engine output that is more suitable for the actual situation can be determined by considering the degree of the NVH performance accepted by the user in the process of determining the maximum power value of the engine output.
It should be noted that, a driving parameter of the vehicle is obtained, where the driving parameter includes at least one of a vehicle speed and an acceleration of the vehicle; the maximum power output by the engine is determined based on the driving parameter. The same applies to the embodiment shown in fig. 1, and can achieve the same technical effect, which is not described herein again.
Step 203: the maximum discharge power value of the battery is determined.
The implementation process and beneficial effects of step 203 can be referred to the description of determining the maximum discharge power value of the battery in step 101, and are not described herein again.
It should be noted that step 203 only needs to be before step 204, may be earlier than step 201, may be later than step 202, and may be performed simultaneously with step 201 and step 202, which is not limited herein.
Step 204: and calculating to obtain a torque limit value of the vehicle based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery.
The implementation process and beneficial effects of step 204 can be referred to the description in step 102, and are not described herein again.
In this embodiment, after the maximum power value output by the engine and the maximum power value output by the generator are respectively determined, the power value with a lower value is used as the maximum power generation power value of the range extender, so as to ensure the effectiveness of the maximum power generation power value of the range extender.
Referring to fig. 3, fig. 3 is a block diagram of a torque limit determination apparatus according to an embodiment of the invention, and as shown in fig. 3, the torque limit determination apparatus 300 includes a determination module 310 and a calculation module 320;
a determining module 310, configured to determine a maximum power generation power value of the range extender and a maximum discharge power value of the battery;
and the calculating module 320 is configured to calculate a torque limit value of the vehicle based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery.
Optionally, referring to fig. 4, the determining module 310 includes:
a determination submodule 311 for determining a maximum power value of the engine output and a maximum power value of the generator output;
the setting submodule 312 is configured to use a power value with a smaller value of the maximum power value output by the engine and the maximum power value output by the generator as the maximum power generation power value of the range extender.
Optionally, as shown in fig. 5, the determining sub-module 311 includes:
a first obtaining unit 3111, configured to obtain an altitude at which the vehicle is located and a temperature value of a cooling liquid in the vehicle;
a first determination unit 3112 for determining a maximum power output of the engine based on an altitude at which the vehicle is located and a temperature value of a cooling liquid in the vehicle.
Optionally, as shown in fig. 6, the determining submodule 311 includes:
a second obtaining unit 3113 configured to obtain a driving parameter of the vehicle, where the driving parameter includes at least one of a vehicle speed and an acceleration of the vehicle;
a second determination unit 3114 for determining a maximum power of the engine output based on the running parameter.
Optionally, in the case that the driving parameter includes an acceleration, the second determining unit 3114 is further configured to determine a maximum power output by the engine based on the acceleration, wherein the maximum power output by the engine is proportional to the acceleration.
Optionally, in a case that the driving parameter includes a vehicle speed, the second determining unit 3114 is further configured to determine a maximum power output by the engine based on the vehicle speed, wherein the maximum power output by the engine is proportional to the vehicle speed.
The torque limit value determining apparatus 300 can implement each process implemented by the torque limit value determining method in the method embodiments of fig. 1 and fig. 2, and is not described herein again to avoid repetition.
The torque limit determining device 300 in the embodiment of the present invention calculates the torque limit based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery, and compared with the prior art that calculates the torque limit based on the current power generation power of the range extender and the maximum discharge power value of the battery, the torque limit can be increased, and the situation that the torque limit is small due to the vehicle condition of the vehicle and the required torque is limited is avoided, so that the limitation of the torque limit on the required torque can be reduced, and the power performance of the vehicle is improved.
The embodiment of the invention also provides a device for determining the torque limit value, which comprises a memory and a processor, wherein:
the processor is used for determining the maximum power generation power value of the range extender and the maximum discharge power value of the battery; and calculating to obtain a torque limit value of the vehicle based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery.
Optionally, the step of determining the maximum power generation power value of the range extender by the processor may include: determining a maximum power value output by the engine and a maximum power value output by the generator; and taking the power value with the smaller numerical value in the maximum power value output by the engine and the maximum power value output by the generator as the maximum power generation power value of the range extender.
Optionally, the processor in executing the step of determining the maximum power value of the engine output may include: acquiring the altitude of the vehicle and the temperature value of cooling liquid in the vehicle; determining a maximum power value output by an engine based on an altitude at which the vehicle is located and a temperature value of a cooling fluid in the vehicle.
Optionally, the processor in executing the step of determining the maximum power value of the engine output may include: acquiring a driving parameter of the vehicle, wherein the driving parameter comprises at least one of a vehicle speed and an acceleration of the vehicle; the maximum power output by the engine is determined based on the driving parameter.
Alternatively, in the case where the driving parameter includes acceleration, the processor in performing the step of determining the maximum power output of the engine based on the driving parameter may include: determining a maximum power output of the engine based on the acceleration, wherein the maximum power output of the engine is proportional to the acceleration.
Alternatively, in the case where the driving parameter includes a vehicle speed, the processor in performing the step of determining the maximum power output of the engine based on the driving parameter may include: determining a maximum power output by an engine based on the vehicle speed, wherein the maximum power output by the engine is proportional to the vehicle speed.
The embodiment of the present invention further provides an electronic device, which includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, and when being executed by the processor, the computer program implements each process of the above-mentioned method for determining a torque limit value, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements each process of the embodiment of the method for determining a torque limit value, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, 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 like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (13)

1. A method for determining a torque limit value for an extended range vehicle, comprising:
determining the maximum power generation power value of the range extender and the maximum discharge power value of the battery, comprising:
determining a maximum power value output by the engine and a maximum power value output by the generator;
taking the power value with the smaller value in the maximum power value output by the engine and the maximum power value output by the generator as the maximum power generation power value of the range extender;
calculating the torque limit value of the vehicle based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery, wherein the torque limit value calculation formula of the vehicle is T max ＝P General assembly ×9550/N，T max Is the torque limit, P General assembly N is the rotation speed of the vehicle motor.
2. The method of claim 1, wherein the step of determining a maximum power value for engine output comprises:
acquiring the altitude of the vehicle and the temperature value of cooling liquid in the vehicle;
determining a maximum power value output by an engine based on an altitude at which the vehicle is located and a temperature value of a cooling fluid in the vehicle.
3. The method of claim 1, wherein the step of determining a maximum power value for engine output comprises:
acquiring a driving parameter of the vehicle, wherein the driving parameter comprises at least one of a vehicle speed and an acceleration of the vehicle;
the maximum power output by the engine is determined based on the driving parameter.
4. The method of claim 3, wherein in the case where the driving parameter includes acceleration, the step of determining the maximum power output of the engine based on the driving parameter includes:
determining a maximum power output by the engine based on the acceleration, wherein the maximum power output by the engine is proportional to the acceleration.
5. The method according to claim 3, wherein in the case where the running parameter includes a vehicle speed, the step of determining the maximum power output of the engine based on the running parameter includes:
determining a maximum power output by an engine based on the vehicle speed, wherein the maximum power output by the engine is proportional to the vehicle speed.
6. A torque limit value determination device applied to an extended range vehicle is characterized by comprising:
the determining module is used for determining the maximum power generation power value of the range extender and the maximum discharge power value of the battery;
the calculation module is used for calculating a torque limit value of the vehicle based on the maximum power generation power value of the range extender and the maximum discharge power value of the battery;
the determining module includes:
a determination submodule for determining a maximum power value output by the engine and a maximum power value output by the generator;
setting submodule for using the power value with smaller value in the maximum power value output by the engine and the maximum power value output by the generator as the maximum power generation power value of the range extender, wherein the torque limit value calculation formula of the vehicle is T max ＝P General assembly ×9550/N，T max Is the torque limit, P General assembly N is the rotation speed of the vehicle motor, which is the maximum power generation power value of the range extender + the maximum discharge power value of the battery.
7. The torque limit determination device of claim 6, wherein the determination submodule comprises:
the first acquisition unit is used for acquiring the altitude of the vehicle and the temperature value of the cooling liquid in the vehicle;
a first determination unit for determining a maximum power value output by an engine based on an altitude at which the vehicle is located and a temperature value of a cooling liquid in the vehicle.
8. The torque limit determination device of claim 7, wherein the determination submodule comprises:
a second acquisition unit configured to acquire a driving parameter of the vehicle, wherein the driving parameter includes at least one of a vehicle speed and an acceleration of the vehicle;
a second determination unit for determining a maximum power output of the engine based on the running parameter.
9. The torque limit determination device of claim 8, wherein the second determination unit, in the event that the driving parameter includes an acceleration, is further configured to determine a maximum power output of an engine based on the acceleration, wherein the maximum power output of the engine is proportional to the acceleration.
10. The torque limit determination device of claim 8, wherein, where the driving parameter comprises a vehicle speed, the second determination unit is further configured to determine a maximum power output by an engine based on the vehicle speed, wherein the maximum power output by the engine is proportional to the vehicle speed.
11. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method of determining a torque limit value as claimed in any one of claims 1 to 5 when executing the computer program.
12. A vehicle, the vehicle being an extended range electric vehicle, characterized in that the vehicle comprises the electronic device of claim 11.
13. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the method of determining a torque limit value according to any one of claims 1 to 5.
CN201910554355.8A 2019-06-25 2019-06-25 Method and device for determining torque limit value Active CN112124316B (en)

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