CN114675684A - Cooling lubricating oil system, control method and device thereof, medium and electronic equipment - Google Patents
Cooling lubricating oil system, control method and device thereof, medium and electronic equipment Download PDFInfo
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- CN114675684A CN114675684A CN202210252658.6A CN202210252658A CN114675684A CN 114675684 A CN114675684 A CN 114675684A CN 202210252658 A CN202210252658 A CN 202210252658A CN 114675684 A CN114675684 A CN 114675684A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/02—Arrangements for conditioning of lubricants in the lubricating system by cooling
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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
- Y02T10/72—Electric energy management in electromobility
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Abstract
The application relates to the technical field of hybrid electric drives, and discloses a lubricating oil cooling system, a control method, a device, a medium and electronic equipment thereof. The lubricating oil cooling system comprises an oil cooler, wherein the oil cooler is communicated with the electric drive assembly system through an oil inlet pipeline and an oil outlet pipeline, and the oil cooler is used for cooling oil; an electric pump for driving oil flow between the oil cooler and the electric drive assembly system; the temperature sensor is arranged in the electric drive assembly system and is used for collecting the system temperature in the electric drive assembly system; and the controller is used for outputting a control current which does not exceed a control upper limit current according to the system temperature so as to control the rotating speed of the electronic pump through the control current. This application need not to set up fluid temperature sensor in the electric drive assembly system outside, also can solve the problem that control current transfinites to can reduce the manufacturing cost of cooling lubricating oil liquid system.
Description
Technical Field
The present disclosure relates to the field of hybrid electric drive technologies, and in particular, to a system for cooling a lubricant, a method and an apparatus for controlling the system, a medium, and an electronic device.
Background
At present, in a cooling lubricating oil system for cooling and lubricating an electric drive assembly system, the oil temperature inside and outside the electric drive assembly system is greatly different, and the oil temperature inside the electric drive assembly system cannot truly express the oil temperature of an oil inlet of the electric drive assembly system. Because the system only has an internal temperature sensor, according to the internal oil temperature, an oil pump rotating speed instruction higher than the actual requirement is very easily given, so that the problem of control current overrun of a controller is caused, and if the temperature sensor is also arranged outside the electric drive assembly system, the problem of high production cost of a cooling lubricating oil system is caused. Therefore, how to solve the problem of control current overrun and reduce the production cost of a lubricating oil cooling system is an urgent technical problem to be solved.
Disclosure of Invention
The application aims to provide a cooling lubricating oil system, a control method, a control device, a medium and electronic equipment thereof, which can solve the problem of control current overrun without arranging an oil temperature sensor outside an electric drive assembly system, thereby reducing the production cost of the cooling lubricating oil system.
Other features and advantages of the present application will be apparent from the following detailed description, or may be learned by practice of the application.
According to a first aspect of embodiments of the present application, there is provided a cooling lube oil system for cooling and lubricating an electric drive assembly system, the cooling lube oil system comprising: the oil cooler is communicated with the electric drive assembly system through an oil inlet pipeline and an oil outlet pipeline and used for cooling oil; an electronic pump for driving oil flow between the oil cooler and the electric drive assembly system; the temperature sensor is arranged in the electric drive assembly system and is used for acquiring the system temperature in the electric drive assembly system; and the controller is used for outputting a control current which does not exceed a control upper limit current according to the system temperature so as to control the rotating speed of the electronic pump through the control current.
In one embodiment of the application, based on the scheme, the temperature sensors comprise a driving motor temperature sensor, a generator temperature sensor and an oil temperature sensor; the system temperature comprises a driving motor temperature, a generator temperature and an oil temperature; the driving motor temperature sensor is used for collecting the driving motor temperature, the generator temperature sensor is used for collecting the generator temperature, and the oil temperature sensor is used for collecting the oil temperature.
According to a second aspect of an embodiment of the present application, there is provided a control method for a cooling lubricant system, the method being performed by a controller in the cooling lubricant system according to the first aspect, the method comprising: acquiring a system temperature in the electric drive assembly system, and determining a theoretical rotating speed for the electronic pump according to the system temperature; acquiring a first actual control current of the controller at the theoretical rotating speed and acquiring an upper limit control current of the controller; calculating a load rate of the controller according to the first actual control current and the upper limit control current, wherein the load rate is used for representing the load degree of the controller and serves as an actual load rate; and determining a second actual control current of the controller according to the actual load factor, and controlling the electronic pump to rotate according to the second actual control current so as to drive oil to flow between the oil cooler and the electric drive assembly system.
In an embodiment of the application, based on the foregoing solution, the calculating an actual load factor of the controller according to the first actual control current and the upper limit control current includes: calculating an actual load rate of the controller by the following formula:
Wherein k represents an actual load rate of the controller; I.C. A1Representing a first actual control current of the controller at the theoretical rotational speed; I.C. A2Representing an upper control current of the controller.
In an embodiment of the application, based on the foregoing solution, the determining a second actual control current of the controller according to the actual load factor includes: and if the actual load factor is less than 1, determining a first actual control current of the controller at the theoretical rotating speed as the second control current.
In an embodiment of the application, based on the foregoing solution, the determining a second actual control current of the controller according to the actual load factor includes: if the actual load rate is greater than or equal to 1, acquiring a preset load rate; and calculating the control current of the controller under the preset load rate as the second actual control current.
In an embodiment of the present application, based on the foregoing solution, the determining a second actual control current of the controller according to the actual load factor includes: acquiring a preset load rate, and calculating a reference control current of the controller under the preset load rate; determining an actual rotational speed of the electronic pump at the reference control current; determining the first actual control current as the second control current if the theoretical rotational speed is less than the actual rotational speed; and if the actual rotating speed is less than the theoretical rotating speed, determining the reference control current as the second control current.
According to a third aspect of an embodiment of the present application, there is provided a control device for a cooling lubricant system, the device being provided to a controller in the cooling lubricant system according to the first aspect, the device including: a first acquiring unit, which is used for acquiring the system temperature in the electric drive assembly system and determining the theoretical rotating speed of the electronic pump according to the system temperature; a second obtaining unit, configured to obtain a first actual control current of the controller at the theoretical rotation speed, and obtain an upper limit control current of the controller; a calculating unit, configured to calculate a load factor of the controller as an actual load factor according to the first actual control current and the upper limit control current, wherein the load factor is used for representing a load degree of the controller; and the determining unit is used for determining a second actual control current of the controller according to the actual load factor and controlling the electronic pump to rotate according to the second actual control current so as to drive the oil to flow between the oil cooler and the electric drive assembly system.
According to a fourth aspect of embodiments herein, there is provided a computer readable storage medium having stored thereon a computer program comprising executable instructions which, when executed by a processor, implement a method of controlling a cooling lubricant system as described in the second aspect embodiment above.
According to a fifth aspect of embodiments herein, there is provided an electronic device, comprising: one or more processors; a memory for storing executable instructions of the processor, which when executed by the one or more processors, cause the one or more processors to implement a method of controlling a cooling lube oil system as described in the embodiment of the second aspect above.
In the technical scheme of this application embodiment, because the controller can be according to the control current that system temperature output does not exceed control upper limit electric current, so, do not exceed control current upper limit through the restriction control current for even under the external environment is low temperature environment's the circumstances, the control current of controller output is in reasonable level all the time, further makes and need not to set up fluid temperature sensor in electric drive assembly system outside, also can solve the problem that control current transfinites, thereby can reduce the manufacturing cost of cooling lubricating oil liquid system.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a block diagram of an architecture of a cooling lubricant system according to an embodiment of the present application;
FIG. 2 is a flow chart illustrating a control method for a system for cooling a lubricating oil according to an embodiment of the present application;
FIG. 3 is a block diagram of a control device of a system for cooling a lubricating oil according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a computer-readable storage medium shown in an embodiment in accordance with the present application;
fig. 5 is a schematic diagram illustrating a system structure of an electronic device according to an embodiment of the present application.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the subject matter of the present application can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the application.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flowcharts shown in the figures are illustrative only and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
It should be noted that: reference herein to "a plurality" means two or more. "and/or" describes the association relationship of the associated object, indicating that there may be three relationships, for example, a and/or B may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the foregoing drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or described herein.
In the application, the cooling lubricating oil system and the control scheme thereof can be applied to the technical field of control of new energy vehicles. Specifically, the new energy vehicle comprises a multi-mode hybrid electric drive assembly system consisting of a drive motor, a generator and a shaft-tooth system. On the other hand, the multi-mode hybrid electric drive assembly system needs to be cooled down because high temperature is generated during operation. On the other hand, since the components of the multi-mode hybrid electric drive assembly system rub against each other during operation, lubrication is required. In order to meet the cooling requirement and the lubricating requirement of the multi-mode hybrid electric drive assembly system, the application provides a lubricating oil cooling system and a control technical scheme thereof.
The implementation details of the technical solution of the embodiment of the present application are set forth in detail below:
according to a first aspect of the embodiments of the present application, please refer to fig. 1, which is a block diagram illustrating an architecture of a system for cooling a lubricant according to the embodiments of the present application.
As shown in fig. 1, the cooling lubricant system is used for cooling and lubricating an electric drive assembly system, and includes: the oil cooler 101, the oil cooler 101 and the electric drive assembly system 105 are communicated with an oil outlet pipeline 107 through an oil inlet pipeline 106, and the oil cooler 101 is used for cooling oil; an electronic pump 102 for driving oil flow between the oil cooler 101 and the electric drive assembly system 105; the temperature sensor 103 is arranged in the electric drive assembly system 105, and is used for collecting the system temperature in the electric drive assembly system 105; and the controller 104 is used for outputting a control current which does not exceed the control upper limit current according to the system temperature so as to control the rotating speed of the electronic pump 102 through the control current.
In one embodiment of the present application, the temperature sensors 103 include a drive motor temperature sensor, a generator temperature sensor, and an oil temperature sensor; the system temperature comprises a driving motor temperature, a generator temperature and an oil temperature; the driving motor temperature sensor is used for collecting the driving motor temperature, the generator temperature sensor is used for collecting the generator temperature, and the oil temperature sensor is used for collecting the oil temperature.
As shown in fig. 1, the whole system for cooling the lubricant includes an internal portion and an external portion, wherein the oil cooler 101 is disposed on the external portion (i.e., the external environment of the system), and after the oil flows into the oil cooler 101 from the electric drive assembly 105 through the oil outlet pipe 107, the oil cooler 101 with a lower temperature absorbs heat in the oil, so as to cool the oil.
In this application, the operation of the electronic pump may be controlled by a controller, and in particular, the controller controls the operation of the electronic pump by outputting a control current to the electronic pump. It can be understood that the larger the control current, the higher the operating power of the electronic pump, and the faster the rotation speed of the electronic pump, further increasing the oil flow speed.
It should be noted that, in terms of the cooling requirement for the electric drive assembly system, when the system temperature (i.e., the drive motor temperature, the generator temperature, and the oil temperature) of the electric drive assembly system is higher, it indicates that the electric drive assembly system has a higher cooling requirement, and if the external temperature is higher, the temperature of the oil flowing into the electric drive assembly system through the oil inlet pipeline is also higher, and at this time, the oil in a unit volume cannot absorb more heat in the electric drive assembly system, so that the oil is required to have a higher flowing speed, so as to accelerate the absorption speed of the heat in the electric drive assembly system. If the external temperature is lower, the temperature of the oil flowing into the electric drive assembly system through the oil inlet pipeline is also lower, and the oil per unit volume can absorb more heat in the electric drive assembly system, so that the oil is not required to have higher flowing speed.
In terms of the lubrication requirement of the electric drive assembly system, other requirements on the flowing speed of the oil liquid are not required, namely, the lubrication requirement of the electric drive assembly system can be met as long as the oil liquid is in a flowing state.
It should be noted that the oil has different viscosities at different temperatures, that is, the lower the temperature of the oil is, the greater the viscosity of the oil is, for example, at normal temperature and high temperature, the influence of the viscosity of the oil is small, but at the low temperature of-10 ℃, the viscosity of the oil changes sharply. This results in a greater resistance to the oil at the same flow rate, and it will be further appreciated that the electronic pump will have a greater load if the oil temperature is lower and the controller will output a greater control current to the electronic pump at the same speed.
In the application, the controller determines the required rotating speed of the electronic pump according to the system temperature of the electric drive assembly system, and if the system temperature is higher, the required rotating speed of the electronic pump is higher, so that the driving oil has higher flow rate, and the absorption of the system temperature of the electric drive assembly system is accelerated.
However, the inventors of the present application have found that determining the control current corresponding to the system temperature based on the system temperature of the electric drive assembly system is only applicable to the case where the external environment is a high temperature environment, and is not applicable to the case where the external environment is a low temperature environment.
If the external environment is a high-temperature environment, the temperature of oil flowing into the electric drive assembly system through the oil inlet pipeline is also higher, the controller determines the higher rotating speed of the electronic pump according to the higher system temperature, and the load of the electronic pump is smaller even if the rotating speed required by the electronic pump is higher due to the higher oil temperature and the lower viscosity of the oil, so that the controller does not need to output a control current higher than the upper limit of the control current of the controller.
If the external environment is a low-temperature environment, the temperature of oil flowing into the electric drive assembly system through the oil inlet pipeline is lower, the controller determines the higher rotating speed of the electronic pump according to the higher system temperature, the viscosity of the oil is higher due to the lower oil temperature, and the load of the electronic pump is larger under the condition that the rotating speed required by the electronic pump is higher, so that the controller can output a control current higher than the upper limit of the control current of the controller.
Based on the discovery, the inventor provides that the controller can output the control current which does not exceed the control upper limit current according to the system temperature, so that the control current is not limited to the control upper limit current, the control current output by the controller is always in a reasonable level even if the external environment is a low-temperature environment, the problem that the control current is out of limit can be solved without arranging an oil temperature sensor outside the electric drive assembly system, and the production cost of the cooling lubricating oil system can be reduced.
According to a second aspect of the embodiments of the present application, a control method for cooling a lubricating oil system is also provided, wherein the control method for cooling a lubricating oil system may be implemented in a controller in the lubricating oil system according to the first aspect.
Fig. 2 is a flowchart illustrating a control method for cooling a lubricating oil system according to an embodiment of the present application, the control method for cooling the lubricating oil system includes at least steps 210 to 270, and the following steps are described in detail:
in step 210, a system temperature within the electric drive assembly system is obtained and a theoretical rotational speed for the electric pump is determined based on the system temperature.
In this application, the system temperature in the electric drive assembly system may include a drive motor temperature, a generator temperature, and an oil temperature, and further, the theoretical rotational speed of the electronic pump may be determined according to the system temperature, and the theoretical rotational speed of the electronic pump may be determined according to the drive motor temperature, the generator temperature, and the oil temperature.
It should be noted that there is a correlation between the system temperature and the theoretical rotation speed of the electronic pump, that is, the higher the system temperature is, the higher the corresponding theoretical rotation speed is, and the theoretical rotation speed corresponds to the flow speed of the oil in the electric drive assembly system, and in the case that the external environment is a high temperature environment, the higher the system temperature is, the higher the theoretical rotation speed of the electronic pump is, so that the flow speed of the oil in the electric drive assembly system is higher, and the absorption speed of the oil on heat in the electric drive assembly system can be further increased.
It should be noted that, in the present application, the theoretical rotation speed determined in step 210 is not the final rotation speed of the operation of the electronic pump, and the actual external temperature environment (i.e., high temperature environment and low temperature environment) needs to be determined through the following steps, and the final control current output by the controller to the electronic pump and the corresponding final rotation speed of the operation of the electronic pump are determined according to the actual external temperature environment.
With continued reference to fig. 2, in step 230, a first actual control current of the controller at the theoretical rotational speed is obtained, and an upper limit control current of the controller is obtained.
In the application, the control current output by the controller to the electronic pump is not only related to the rotation speed of the electronic pump, but also related to the temperature of the oil (i.e. the viscosity of the oil), that is, if the temperature of the oil is lower, the viscosity of the oil is higher, the resistance of the oil at the same flow speed is higher, the load of the electronic pump is larger, and the control current output by the controller to the electronic pump is larger. If the temperature of the oil liquid is higher, the viscosity of the oil liquid is lower, the resistance of the oil liquid at the same flowing speed is smaller, the load of the electronic pump is smaller, and the control current output to the electronic pump by the controller is smaller.
In the application, the upper limit control current of the controller refers to the maximum current that the controller can bear, and it can be understood that if the control current output by the controller exceeds the upper limit control current of the controller, the current may be overrun to trigger the controller to perform power-off protection, so that the cooling lubricating oil system stops working, the electric drive assembly system is damaged, and then the vehicle alarm is triggered to stop working.
By acquiring the first actual control current of the controller at the theoretical rotating speed and acquiring the upper limit control current of the controller, the external temperature environment can be reversely deduced in the subsequent steps, and the temperature and the viscosity degree of the oil liquid can be further determined.
In step 250, a load factor of the controller is calculated as an actual load factor according to the first actual control current and the upper limit control current, and the load factor is used for representing a load degree of the controller.
In one embodiment of step 250, said calculating an actual load factor of said controller according to said first actual control current and said upper limit control current comprises: calculating an actual load rate of the controller by the following formula (1):
wherein k represents an actual load rate of the controller; I.C. A1Representing a first actual control current of the controller at the theoretical rotational speed; I.C. A2Representing an upper control current of the controller.
In this embodiment, the load factor k may substantially represent a thermal load of the controller.
In another embodiment of step 250, said calculating an actual load factor of said controller based on said first actual control current and said upper limit control current comprises: calculating an actual load rate of the controller by the following equation (2):
Wherein k represents an actual load rate of the controller; I.C. A1Representing a first actual control current of the controller at the theoretical rotational speed; I.C. A2Representing an upper control current of the controller.
In step 270, a second actual control current of the controller is determined according to the actual load factor, and the electronic pump is controlled to rotate according to the second actual control current, so as to drive oil to flow between the oil cooler and the electric drive assembly system.
In one embodiment of step 270, said determining a second actual control current of said controller based on said actual load factor may be performed according to the following steps:
and if the actual load factor is less than 1, determining a first actual control current of the controller at the theoretical rotating speed as the second control current.
It is understood that, when the actual load factor is less than 1, it indirectly indicates that the external environment temperature is higher, the oil viscosity is lower, the load of the electronic pump is smaller, and the first actual control current of the controller at the theoretical rotation speed does not exceed the upper limit control current of the controller, so that the first actual control current of the controller at the theoretical rotation speed can be directly determined as the second control current, and the electronic pump is controlled to rotate according to the second actual control current, so as to drive the oil to flow between the oil cooler and the electric drive assembly.
Further, in this embodiment, the determining the second actual control current of the controller according to the actual load factor may further perform the following steps 271 to 272:
and 271, if the actual load rate is greater than or equal to 1, acquiring a preset load rate.
And 272, calculating the control current of the controller under the preset load rate as the second actual control current.
It can be understood that, when the actual load factor is greater than or equal to 1, it indirectly indicates that the external environment temperature is low, the oil viscosity is low, the load of the electronic pump is large, and the first actual control current of the controller at the theoretical rotation speed exceeds the upper limit control current of the controller, so that the first actual control current of the controller at the theoretical rotation speed cannot be directly determined as the second control current.
In this case, since the temperature of the outside is low, the temperature of the oil flowing into the electric drive assembly system through the oil inlet pipe is also low, and the oil per unit volume can absorb more heat in the electric drive assembly system, so that the oil is not required to have a high flow speed. Therefore, a preset load factor can be obtained, the control current of the controller at the preset load factor is used as the second actual control current, and the electronic pump is controlled to rotate according to the second actual control current so as to drive oil to flow between the oil cooler and the electric drive assembly system.
In this embodiment, a preset load factor of 0.8 may be selected, and a preset load factor of 0.85 may also be selected, where it should be noted that the present application does not limit specific values of the preset load factors.
In this embodiment, the control current of the controller at the preset load factor is calculated according to the above formula (1) or formula (2).
In another embodiment of step 270, the determining the second actual control current of the controller according to the actual load factor may be further performed according to the following steps 273 to 276:
and 273, acquiring a preset load rate, and calculating a reference control current of the controller under the preset load rate.
In step 274, the actual speed of the electronic pump at the reference control current is determined.
Step 275, determining the first actual control current as the second control current if the theoretical rotational speed is less than the actual rotational speed.
Step 276, if the actual rotation speed is less than the theoretical rotation speed, determining the reference control current as the second control current.
It can be understood that, if the theoretical rotation speed is less than the actual rotation speed, it indirectly indicates that the external environment temperature is higher, the oil viscosity is lower, the load of the electronic pump is smaller, and the first actual control current of the controller at the theoretical rotation speed does not exceed the upper limit control current of the controller, so the first actual control current of the controller at the theoretical rotation speed can be directly determined as the second control current.
If the actual rotating speed is smaller than the theoretical rotating speed, the fact that the external environment temperature is lower, the oil viscosity is lower, the load of the electronic pump is larger, the first actual control current of the controller at the theoretical rotating speed exceeds the upper limit control current of the controller, therefore, the first actual control current of the controller at the theoretical rotating speed cannot be directly determined as the second control current, and the reference control current of the controller at the preset load rate is required to be used as the second actual control current.
In summary, in the technical solution of the embodiment of the present application, the controller can output the control current not exceeding the control upper limit current according to the system temperature and controlling the load factor of the controller, so that the control current is not exceeding the control current upper limit by limiting the control current, so that the control current output by the controller is always at a reasonable level even when the external environment is a low-temperature environment, and further the problem of the control current being out of limit can be solved without arranging an oil temperature sensor outside the electric drive assembly system, thereby reducing the production cost of the cooling lubricating oil system.
Embodiments of the apparatus of the present application are described below, which may be used to implement the control method for cooling the lubricant system in the above-described embodiments of the present application. For details not disclosed in the embodiments of the apparatus of the present application, please refer to the embodiments of the control method for cooling the lubricant system described above in the present application.
Fig. 3 is a block diagram of a control device of a system for cooling lubricating oil according to an embodiment of the present application.
Referring to fig. 3, a control device 300 for a cooling lubricant system according to an embodiment of the present application, the device 300 being provided to a controller in a cooling lubricant system according to the first aspect, comprises: a first acquisition unit 301, a second acquisition unit 302, a calculation unit 303, and a determination unit 304.
A first acquiring unit 301, configured to acquire a system temperature in the electric drive assembly system and determine a theoretical rotation speed for the electronic pump according to the system temperature; a second obtaining unit 302, configured to obtain a first actual control current of the controller at the theoretical rotation speed, and obtain an upper limit control current of the controller; a calculating unit 303, configured to calculate a load rate of the controller according to the first actual control current and the upper limit control current, as an actual load rate, where the load rate is used to represent a load degree of the controller; a determining unit 304, configured to determine a second actual control current of the controller according to the actual load factor, and control the electronic pump to rotate according to the second actual control current, so as to drive oil to flow between the oil cooler and the electric drive assembly system.
As another aspect, the present application also provides a computer-readable storage medium having stored thereon a program product capable of implementing the control method of the cooling lubricant system described above in this specification. In some possible embodiments, various aspects of the present application may also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps according to various exemplary embodiments of the present application described in the "exemplary methods" section above of this specification, when the program product is run on the terminal device.
Referring to fig. 4, a program product 400 for implementing the above method according to an embodiment of the present application is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present application is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
As another aspect, the present application also provides an electronic device capable of implementing the control method for a cooling lubricant system described above.
As will be appreciated by one skilled in the art, aspects of the present application may be embodied as a system, method or program product. Accordingly, various aspects of the present application may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.), or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
An electronic device 500 according to this embodiment of the present application is described below with reference to fig. 5. The electronic device 500 shown in fig. 5 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.
As shown in fig. 5, the electronic device 500 is embodied in the form of a general purpose computing device. The components of the electronic device 500 may include, but are not limited to: the at least one processing unit 510, the at least one memory unit 520, and a bus 530 that couples various system components including the memory unit 520 and the processing unit 510.
Wherein the storage unit stores program code, which can be executed by the processing unit 510, to cause the processing unit 510 to perform the steps according to various exemplary embodiments of the present application described in the section "example methods" above in this specification.
The storage unit 520 may include readable media in the form of volatile storage units, such as a random access memory unit (RAM)521 and/or a cache memory unit 522, and may further include a read only memory unit (ROM) 523.
The storage unit 520 may also include a program/utility 524 having a set (at least one) of program modules 525, such program modules 525 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
The electronic device 500 may also communicate with one or more external devices 1200 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 500, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 500 to communicate with one or more other computing devices. Such communication may occur via input/output (I/O) interfaces 550. Also, the electronic device 500 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the internet) via the network adapter 560. As shown, the network adapter 560 communicates with the other modules of the electronic device 500 over the bus 530. It should be appreciated that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the electronic device 500, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, and may also be implemented by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to make a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) execute the method according to the embodiments of the present application.
Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the present application, and are not intended to be limiting. It will be readily appreciated that the processes illustrated in the above figures are not intended to indicate or limit the temporal order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. A cooling lube oil system for cooling and lubricating an electric drive assembly system, comprising:
the oil cooler is communicated with the electric drive assembly system through an oil inlet pipeline and an oil outlet pipeline and used for cooling oil;
an electric pump for driving oil flow between the oil cooler and the electric drive assembly system;
the temperature sensor is arranged in the electric drive assembly system and is used for acquiring the system temperature in the electric drive assembly system;
and the controller is used for outputting a control current which does not exceed a control upper limit current according to the system temperature so as to control the rotating speed of the electronic pump through the control current.
2. The system of claim 1, wherein the temperature sensors include a drive motor temperature sensor, a generator temperature sensor, and an oil temperature sensor; the system temperature comprises a driving motor temperature, a generator temperature and an oil temperature; the driving motor temperature sensor is used for collecting the driving motor temperature, the generator temperature sensor is used for collecting the generator temperature, and the oil temperature sensor is used for collecting the oil temperature.
3. A method of controlling a system for cooling a lubricating oil, the method being performed by a controller in a system for cooling a lubricating oil according to claims 1-2, the method comprising:
acquiring a system temperature in the electric drive assembly system, and determining a theoretical rotating speed for the electronic pump according to the system temperature;
acquiring a first actual control current of the controller at the theoretical rotating speed and acquiring an upper limit control current of the controller;
calculating a load rate of the controller according to the first actual control current and the upper limit control current, wherein the load rate is used for representing the load degree of the controller and is used as an actual load rate;
and determining a second actual control current of the controller according to the actual load factor, and controlling the electronic pump to rotate according to the second actual control current so as to drive oil to flow between the oil cooler and the electric drive assembly system.
4. The method of claim 3, wherein calculating the actual load factor of the controller based on the first actual control current and the upper limit control current comprises: calculating an actual load rate of the controller by the following formula:
Wherein k represents an actual load rate of the controller; I.C. A1Representing a first actual control current of the controller at the theoretical rotational speed; I.C. A2Representing an upper control current of the controller.
5. The method of claim 3, wherein determining a second actual control current of the controller based on the actual load factor comprises:
and if the actual load factor is less than 1, determining the first actual control current of the controller at the theoretical rotating speed as the second control current.
6. The method of claim 3, wherein determining a second actual control current of the controller based on the actual load factor comprises:
if the actual load rate is greater than or equal to 1, acquiring a preset load rate;
and calculating the control current of the controller under the preset load rate as the second actual control current.
7. The method of claim 3, wherein determining a second actual control current of the controller based on the actual load factor comprises:
acquiring a preset load rate, and calculating a reference control current of the controller under the preset load rate;
Determining the actual rotation speed of the electronic pump under the reference control current;
if the theoretical rotating speed is smaller than the actual rotating speed, determining the first actual control current as the second control current;
and if the actual rotating speed is less than the theoretical rotating speed, determining the reference control current as the second control current.
8. A control device for a system for cooling a lubricating oil according to any one of claims 1 to 2, said device being provided in a controller for a system for cooling a lubricating oil according to any one of claims 1 to 2, said device comprising:
the first acquisition unit is used for acquiring the system temperature in the electric drive assembly system and determining the theoretical rotating speed of the electronic pump according to the system temperature;
a second obtaining unit, configured to obtain a first actual control current of the controller at the theoretical rotation speed, and obtain an upper limit control current of the controller;
a calculation unit, configured to calculate a load factor of the controller as an actual load factor according to the first actual control current and the upper limit control current, where the load factor is used to represent a load degree of the controller;
and the determining unit is used for determining a second actual control current of the controller according to the actual load factor and controlling the electronic pump to rotate according to the second actual control current so as to drive oil to flow between the oil cooler and the electric drive assembly system.
9. A computer-readable storage medium having at least one program code stored therein, the at least one program code being loaded into and executed by a processor to perform operations performed by the control method for cooling a lubrication oil system of any one of claims 3 to 7.
10. An electronic device, comprising one or more processors and one or more memories having stored therein at least one program code, the at least one program code being loaded into and executed by the one or more processors to perform operations performed by a control method for cooling a lubricating oil system according to any one of claims 3 to 7.
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| CN202210252658.6A CN114675684B (en) | 2022-03-10 | 2022-03-10 | Cooling lubricating oil liquid system, control method and device thereof, medium and electronic equipment |
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| CN202210252658.6A CN114675684B (en) | 2022-03-10 | 2022-03-10 | Cooling lubricating oil liquid system, control method and device thereof, medium and electronic equipment |
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| CN114675684B (en) | 2023-08-29 |
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