CN112061109A - Power transmission control method, device, vehicle and storage medium - Google Patents

Power transmission control method, device, vehicle and storage medium Download PDF

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Publication number
CN112061109A
CN112061109A CN202010915260.7A CN202010915260A CN112061109A CN 112061109 A CN112061109 A CN 112061109A CN 202010915260 A CN202010915260 A CN 202010915260A CN 112061109 A CN112061109 A CN 112061109A
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China
Prior art keywords
theoretical
torque
engine
gearbox
rotating speed
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Pending
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CN202010915260.7A
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Chinese (zh)
Inventor
陈礼光
邵晖
陈继炯
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Guangxi Liugong Machinery Co Ltd
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Guangxi Liugong Machinery Co Ltd
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Priority to CN202010915260.7A priority Critical patent/CN112061109A/en
Publication of CN112061109A publication Critical patent/CN112061109A/en
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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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • 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
    • B60W2510/0638—Engine speed
    • 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
    • B60W2510/10—Change speed gearings
    • B60W2510/1025—Input torque
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0644—Engine speed
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/10—Change speed gearings
    • B60W2710/1022—Input torque

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mathematical Physics (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The embodiment of the application provides a power transmission control method, a device, a vehicle and a storage medium, when a driver steps on an accelerator, the theoretical input torque of a gearbox is determined according to the theoretical rotating speed of an engine, whether the theoretical input torque of the gearbox is larger than the limiting torque of the gearbox is determined, if yes, the engine is controlled to operate at a target rotating speed, and if not, the engine is controlled to operate at the theoretical rotating speed, wherein the target rotating speed is smaller than the theoretical rotating speed, so that the control of the rotating speed of the engine on the input torque of the gearbox is realized, the working performance of the gearbox is protected, and the output efficiency of the whole machine is improved.

Description

Power transmission control method, device, vehicle and storage medium
Technical Field
The embodiment of the application relates to the technical field of mechanical control, in particular to a power transmission control method, a power transmission control device, a vehicle and a storage medium.
Background
The gearbox is one of the most important components of a power transmission system of a vehicle, and the service performance of the whole gearbox is seriously influenced by the good and bad working performance of the gearbox. Therefore, in order to better exert the service performance of the whole machine, it is necessary to adopt certain measures to protect the working performance of the gearbox.
The excessive input torque is a key factor influencing the working reliability and the service life of the gearbox, and in order to prevent the influence of the excessive input torque on the gearbox, in the prior art, when the excessive input torque of the gearbox occurs, the purpose of limiting the input torque of the gearbox within the allowable value range is achieved by reducing the output power of an engine.
However, in the prior art, when the output power of the engine is reduced, the characteristic output parameters of the whole engine are also deteriorated, so that the problem of low output efficiency of the whole engine exists in the prior art.
Disclosure of Invention
The embodiment of the application provides a power transmission control method, a power transmission control device, a vehicle and a storage medium, and aims to solve the technical problem that the overall output efficiency is not high in the prior art.
In a first aspect, an embodiment of the present application provides a power transmission control method, including:
when a driver steps on an accelerator, determining theoretical input torque of a gearbox according to the theoretical rotating speed of an engine;
determining whether a theoretical input torque of the gearbox is greater than a limit torque of the gearbox; if yes, controlling the engine to operate at a target rotating speed; if not, controlling the engine to run at the theoretical rotating speed; the target rotational speed is less than the theoretical rotational speed.
Alternatively, the controlling the engine to operate at a target rotation speed includes:
determining a target rotating speed of the engine according to the theoretical input torque of the gearbox and the limiting torque of the gearbox;
and sending a first control message to the engine, wherein the first control message comprises the target rotating speed.
Optionally, the determining a theoretical input torque of the gearbox according to the theoretical rotation speed comprises:
determining theoretical input torque of the torque converter according to the theoretical rotating speed and characteristic parameters of the torque converter, wherein the characteristic parameters comprise effective ring diameter and torque coefficient;
and determining the theoretical input torque of the gearbox according to the theoretical input torque of the torque converter and the torque ratio of the torque converter.
Optionally, the determining a theoretical input torque of the torque converter according to the theoretical rotation speed and a characteristic parameter of the torque converter includes:
calculating formula T according to input torque of torque converterB＝ρgn2D5λ, determining a theoretical input torque of said torque converter, wherein TBThe torque converter is characterized by representing theoretical input torque of the torque converter, rho represents density of a liquid medium in the torque converter, g represents gravity acceleration, n represents theoretical rotating speed of an engine, D represents effective annular diameter of the torque converter, and lambda represents torque coefficient of the torque converter.
Optionally, the determining the theoretical input torque of the gearbox according to the theoretical input torque of the torque converter and the torque ratio of the torque converter comprises:
calculating formula T according to input torque of gearboxE＝KTBDetermining a theoretical input torque of said gearbox, wherein TERepresenting the theoretical input torque of the gearbox, K representing the torque ratio of the torque converter, TBIs the theoretical input torque of the torque converter.
Optionally, before determining the theoretical input torque of the gearbox according to the theoretical rotation speed of the engine, the method further comprises:
acquiring an opening value of the accelerator;
and determining the theoretical rotating speed of the engine according to the corresponding relation between the opening degree of the accelerator and the rotating speed of the engine.
Optionally, the controlling the engine to operate at the theoretical rotational speed includes:
and sending a second control message to the engine, wherein the second control message comprises the theoretical rotating speed.
In a second aspect, an embodiment of the present application provides a power transmission control apparatus, including:
the first processing module is used for determining theoretical input torque of the gearbox according to the theoretical rotating speed of the engine when a driver steps on an accelerator;
the second processing module is used for determining whether the theoretical input torque of the gearbox is larger than the limit torque of the gearbox; if yes, controlling the engine to operate at a target rotating speed; if not, controlling the engine to run at the theoretical rotating speed; the target rotational speed is less than the theoretical rotational speed.
In a third aspect, embodiments of the present application provide a vehicle, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the program to implement the power transmission control method according to the first aspect.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the power transmission control method as described in the first aspect above.
The power transmission control method, the device, the vehicle and the storage medium provided by the embodiment of the application determine the theoretical input torque of the gearbox according to the theoretical rotating speed of the engine when a driver steps on an accelerator, determine whether the theoretical input torque of the gearbox is larger than the limiting torque of the gearbox, if so, control the engine to operate at the target rotating speed, and if not, control the engine to operate at the theoretical rotating speed, wherein the target rotating speed is smaller than the theoretical rotating speed, so that the rotating speed of the engine is reduced only at the point that the input torque of the gearbox is larger than the limiting torque of the gearbox, the maximum value of the input torque of the gearbox is cut off, the input torque of the gearbox is ensured to be in an allowable value range, and the original rotating speed of the engine is kept unchanged at other points, thereby basically maintaining the service performance of the whole machine while protecting the gearbox, compared with the prior art, the technical scheme of the application is adopted, the output efficiency of the whole machine is improved.
Drawings
Fig. 1 is a schematic view of a power transmission control method according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart illustrating a power transmission control method according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of the output characteristics of the whole device according to the first embodiment of the present application;
fig. 4 is a schematic structural diagram of a power transmission control device according to a second embodiment of the present application;
fig. 5 is a schematic structural diagram of a vehicle according to a third embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.
The embodiment of the application provides a technical scheme for intelligently controlling a power transmission system, and the technical scheme is used for controlling equipment in the power transmission system by a controller so as to meet the power driving requirement of a vehicle. Exemplarily, fig. 1 is a schematic view of a power transmission control method according to an embodiment of the present application, and as shown in fig. 1, a power transmission system is composed of an engine, a torque converter, which is also called a torque converter, and mainly includes components such as a pump impeller, a turbine runner, and a guide wheel, the engine is connected to the pump impeller of the torque converter, the transmission is connected to the turbine runner of the torque converter, and the guide wheel is located between the pump impeller and the turbine runner. In order to realize the control of the power transmission system, the controller is respectively connected with the engine, the torque converter and the gearbox.
The main ideas of the technical scheme are as follows: when the torque of a gearbox in a power transmission system is limited in the prior art, the technical problem that the efficiency of the whole machine is reduced exists. Based on the technical problems in the prior art, the technical scheme for controlling the power transmission system reduces the rotating speed of the engine only at the point that the input torque of the gearbox is larger than the limit torque of the gearbox, so as to cut off the maximum value of the input torque and ensure that the input torque of the gearbox is within the allowable value range, and keeps the original output characteristic of the engine unchanged at other points, thereby basically maintaining the use performance of the whole machine while protecting the gearbox.
Example one
Fig. 2 is a schematic flow chart of a power transmission control method according to an embodiment of the present invention, where the method of the present embodiment may be executed by a power transmission control device according to an embodiment of the present invention, and the device may be implemented by software and/or hardware, such as a controller, and may be integrated in various vehicles, such as a loader, a car, and the like. Illustratively, as shown in fig. 2, the power transmission control method of the embodiment includes:
s101, determining theoretical input torque of the gearbox according to the theoretical rotating speed of the engine when a driver steps on an accelerator.
In the existing engine control strategy (first engine control strategy), according to the driving intention of a driver, an ECU directly controls the rotation speed of an engine to follow the opening degree of an accelerator, and in the step, the theoretical rotation speed of the engine is the rotation speed of the engine calculated by the existing engine control strategy.
In the step, in order to avoid the damage of the gearbox caused by the overlarge input torque of the gearbox, when the theoretical rotating speed of the engine is obtained by calculation according to the current throttle opening, a rotating speed control signal is not immediately sent to the engine, but the theoretical input torque of the gearbox is further determined by calculation according to the numerical value of the theoretical rotating speed.
As can be seen from fig. 1, in the present embodiment, the engine and the transmission are connected by a torque converter, the engine is connected to a pump impeller of the torque converter, and the transmission is connected to the torque converter and a turbine impeller of the torque converter. Under the condition that the type selection of the engine, the torque converter and the gearbox is known, in the step, the theoretical input torque of the gearbox can be determined according to the connection relation among the engine, the torque converter and the gearbox, and specifically:
first, the theoretical input torque of the torque converter may be determined according to the connection relationship of the engine and the torque converter. As can be seen from fig. 1, the theoretical input torque of the torque converter is the theoretical input torque of the pump impeller, and therefore, in this step, the theoretical input torque of the torque converter can be determined by the following formula:
TB＝ρgn2D5λ (1)
wherein, TBThe torque converter is characterized by showing theoretical input torque of the torque converter (namely theoretical input torque of a pump impeller), rho showing density of a liquid medium in the torque converter, g showing gravity acceleration, n showing theoretical rotating speed of an engine (because the pump impeller is rigidly connected with the engine, the rotating speed of the pump impeller is always equal to the rotating speed of the engine, so the theoretical input torque of the torque converter can be calculated through the theoretical rotating speed of the engine), D showing effective ring diameter of the torque converter, and lambda showing a torque coefficient of the pump impeller.
For a designed torque converter, the parameters ρ, g, D and λ in the formula (1) are all known and fixed values, so that when the theoretical rotation speed of the engine is calculated, the theoretical input torque of the torque converter can be determined.
And secondly, determining the theoretical input torque of the gearbox according to the internal structure of the torque converter and the connection relation between the torque converter and the gearbox. The theoretical input torque of the gearbox is the theoretical output torque of the turbine in the torque converter. Therefore, in this step, in the case where the theoretical input torque of the torque converter is known, the theoretical input torque of the transmission can be determined by the following formula:
TE＝KTB (2)
wherein, TERepresenting the theoretical input torque, T, of the gearboxBFor the theoretical input torque of the torque converter, K represents the torque ratio of the torque converter, i.e., the ratio of the turbine output torque to the pump input torque, which is a quantity related to the ratio of the turbine rotation speed to the pump rotation speed.
As can be seen from the above equations (1) and (2), in the case where the types of the engine, the torque converter, and the transmission are determined, the input torque of the transmission is only related to the rotational speed of the engine. Therefore, in this step, the theoretical input torque of the transmission can be determined according to the theoretical rotation speed of the engine through the above process.
And S102, determining whether the theoretical input torque of the gearbox is larger than the limit torque of the gearbox.
In this step, after S101, further, by determining whether the theoretical input torque of the transmission calculated in S101 is greater than the limit torque thereof, and determining a control strategy for the engine according to the determination result, specifically, if the determination result is that the theoretical input torque of the transmission is greater than the limit torque of the transmission, S103 is executed, and if the determination result is that the theoretical input torque of the transmission is less than or equal to the limit torque of the transmission, S104 is executed.
The limited torque is the maximum value of the allowable input torque, and the limited torque is determined by the characteristics of the transmission, that is, when the input torque is within the limited range of the limited torque, the transmission is safe, and if the transmission operates with the input torque exceeding the limited torque, the working performance, such as the service life and the reliability, of the transmission are irreversibly damaged.
And S103, controlling the engine to operate at the target rotating speed.
In the step, when the theoretical input torque of the gearbox is determined to be larger than the limiting torque of the gearbox, the controller controls the engine to operate at the target rotating speed, wherein the target rotating speed is the rotating speed of the engine determined by adopting the second control strategy, and the target rotating speed is smaller than the theoretical rotating speed of the engine at the current moment, so that the theoretical input torque of the gearbox is reduced, and the theoretical input torque of the gearbox is limited within the limiting range of the limiting torque of the gearbox.
In a possible implementation manner, the engine speed determined by the second control strategy may specifically be to determine a target speed of the engine according to a theoretical input torque of the transmission and a limiting torque of the transmission, and may, for example, determine the target speed of the engine by means of a reverse-deduction of formula (1) and formula (2), or may determine the target speed of the engine by using a stored table of correspondence between the target speed and the theoretical input torque, where the table of correspondence between the target speed and the theoretical input torque may be determined by calibration by a relevant person in advance. In this implementation, the specific implementation manner for determining the target engine speed may be determined by actual conditions, and is not limited herein.
After the target rotating speed of the engine is determined, in this step, the rotating speed of the engine can be controlled by sending a control message (a first control message) to the engine, wherein the first control message includes the target rotating speed.
And S104, controlling the engine to operate at the theoretical rotating speed.
In this step, when it is determined that the theoretical input torque of the transmission is less than or equal to the limit torque of the transmission, the engine is controlled to operate at the theoretical rotation speed, specifically, a second control message may be sent to the engine, where the second control message includes the theoretical rotation speed, and the engine is controlled to operate at the theoretical rotation speed by the second control message.
Optionally, before determining the theoretical input torque of the transmission according to the theoretical rotation speed of the engine, the method of the embodiment may further include: and acquiring the current opening value of the accelerator, and determining the theoretical rotating speed of the engine according to the opening value of the accelerator.
In a possible implementation mode, the controller calculates the fuel injection quantity according to the opening value of the accelerator, and further calculates and determines the theoretical rotating speed of the engine according to the calculated fuel injection quantity.
In another possible implementation manner, the controller determines the theoretical rotating speed of the engine in a table look-up manner according to the corresponding relation between the accelerator opening value and the rotating speed of the engine, which is stored in the controller. The corresponding relation between the accelerator opening value and the engine speed can be obtained by calibration of related workers.
As an example, the above embodiment only provides a technical solution of performing power transmission control by an engine controller, that is, S101-S104 are all performed by the engine controller alone, it can be understood that the technical solution of the embodiment of the present application can also be performed by the engine controller and a transmission controller in cooperation, except that in S101-S102, a transmission controller obtains a theoretical rotational speed of the engine from the engine controller, determines a theoretical input torque of the transmission according to the theoretical rotational speed of the engine and determines whether the theoretical input torque is greater than a limiting torque of the transmission, in S103-S104, when the transmission controller determines that the theoretical input torque of the transmission is greater than the limiting torque of the transmission, the transmission controller sends a control message (such as TSC1 message) to the engine controller, and carries the theoretical input torque of the transmission and the limiting torque of the transmission in the control message, the engine controller is triggered to acquire a target rotating speed and control the engine to operate at the target rotating speed; when the gearbox controller determines that the theoretical input torque of the gearbox is less than or equal to the limit torque of the gearbox, the gearbox controller does not perform any operation, and the engine controller controls the engine to operate at the theoretical rotating speed.
Fig. 3 is a schematic diagram of the output characteristic of the whole engine according to the first embodiment of the present invention, fig. 3 is a variation of the traction force of the whole engine with the vehicle speed at the first gear, as shown in fig. 3, a position where the traction force is 200kN corresponds to a torque limit position of the transmission, a broken line in the diagram indicates a case where the engine is not limited, as can be seen from the diagram, the input torque of the transmission at this time exceeds the torque limit thereof, a solid line in the diagram indicates a case where the engine is limited by the technical solution of the present application (except near a peak position, the remaining positions overlap with the output characteristic curve when the engine is not limited), and a chain line in the diagram indicates a case where the engine is limited by the conventional technical solution. As can be seen from fig. 3, the traction force is reduced only at the peak position by using the technical solution of the present application, and the original output characteristics are maintained at other positions, while the output characteristics at each position are reduced by using the technical solution of the prior art, so that the output efficiency of the whole machine is improved by using the technical solution of the present application compared with the prior art.
In the embodiment, when a driver steps on an accelerator, the theoretical input torque of the gearbox is determined according to the theoretical rotating speed of the engine, whether the theoretical input torque of the gearbox is larger than the limiting torque of the gearbox is determined, if yes, the engine is controlled to operate at the target rotating speed, if not, the engine is controlled to operate at the theoretical rotating speed, wherein the target rotating speed is smaller than the theoretical rotating speed, the rotating speed of the engine is reduced only at the point that the input torque of the gearbox is larger than the limiting torque of the gearbox, the maximum value of the input torque of the gearbox is cut off, the input torque of the gearbox is ensured to be within an allowable value range, and the original rotating speed of the engine is kept unchanged at other points, so that the service performance of the whole gearbox is basically maintained while the gearbox is protected.
Example two
Fig. 4 is a schematic structural diagram of a power transmission control device according to a second embodiment of the present application, and as shown in fig. 4, the power transmission control device 10 in this embodiment includes:
a first processing module 11 and a second processing module 12.
The first processing module 11 is used for determining theoretical input torque of the gearbox according to the theoretical rotating speed of the engine when a driver steps on an accelerator;
a second processing module 12 for determining whether a theoretical input torque of the gearbox is greater than a limit torque of the gearbox; if yes, controlling the engine to operate at a target rotating speed; if not, controlling the engine to run at the theoretical rotating speed; the target rotational speed is less than the theoretical rotational speed.
Optionally, the second processing module 12 is specifically configured to:
determining a target rotating speed of the engine according to the theoretical input torque of the gearbox and the limiting torque of the gearbox;
and sending a first control message to the engine, wherein the first control message comprises the target rotating speed.
Optionally, the first processing module 11 is specifically configured to:
determining theoretical input torque of the torque converter according to the theoretical rotating speed and characteristic parameters of the torque converter, wherein the characteristic parameters comprise effective ring diameter and torque coefficient;
and determining the theoretical input torque of the gearbox according to the theoretical input torque of the torque converter and the torque ratio of the torque converter.
Optionally, the first processing module 11 is specifically configured to:
calculating formula T according to input torque of torque converterB＝ρgn2D5λ, determining a theoretical input torque of said torque converter, wherein TBThe torque converter is characterized by representing theoretical input torque of the torque converter, rho represents density of a liquid medium in the torque converter, g represents gravity acceleration, n represents theoretical rotating speed of an engine, D represents effective annular diameter of the torque converter, and lambda represents torque coefficient of the torque converter.
Optionally, the first processing module 11 is specifically configured to:
calculating formula T according to input torque of gearboxE＝KTBDetermining a theoretical input torque of said gearbox, wherein TERepresenting the theoretical input torque of the gearbox, K representing the torque ratio of the torque converter, TBIs the theoretical input torque of the torque converter.
Optionally, the first processing module 11 is further configured to:
acquiring an opening value of the accelerator;
and determining the theoretical rotating speed of the engine according to the corresponding relation between the opening degree of the accelerator and the rotating speed of the engine.
Optionally, the second processing module 11 is specifically configured to:
and sending a second control message to the engine, wherein the second control message comprises the theoretical rotating speed.
The power transmission control device provided by the embodiment can execute the power transmission control method provided by the method embodiment, and has corresponding functional modules and beneficial effects of the execution method. The implementation principle and technical effect of this embodiment are similar to those of the above method embodiments, and are not described in detail here.
EXAMPLE III
Fig. 5 is a schematic structural diagram of a vehicle according to a third embodiment of the present application, and as shown in fig. 5, the vehicle 20 includes a memory 21, a processor 22, and a computer program stored in the memory and executable on the processor; the number of processors 22 of the vehicle 20 may be one or more, with one processor 22 being exemplified in fig. 5; the processor 22 and the memory 21 in the vehicle 20 may be connected by a bus or other means, and fig. 5 illustrates the bus connection as an example.
The memory 21 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the first processing module 11 and the second processing module 12 in the embodiment of the present application. The processor 22 executes various functional applications of the device/terminal/server and data processing by running software programs, instructions and modules stored in the memory 21, that is, implements the power transmission control method described above.
The memory 21 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 21 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 21 may further include memory located remotely from the processor 22, which may be connected to the device/terminal/server through a grid. Examples of such a mesh include, but are not limited to, the internet, an intranet, a local area network, a mobile communications network, and combinations thereof.
Example four
A fourth embodiment of the present application further provides a computer-readable storage medium having stored thereon a computer program for executing, when executed by a computer processor, a power transmission control method, the method including:
when a driver steps on an accelerator, determining theoretical input torque of a gearbox according to the theoretical rotating speed of an engine;
determining whether a theoretical input torque of the gearbox is greater than a limit torque of the gearbox; if yes, controlling the engine to operate at a target rotating speed; if not, controlling the engine to run at the theoretical rotating speed; the target rotational speed is less than the theoretical rotational speed.
Of course, the embodiments of the present application provide a package computer-readable storage medium, and the computer program thereof is not limited to the method operations described above, and can also execute the relevant operations in the power transmission control method provided in any embodiments of the present application.
From the above description of the embodiments, it is obvious for those skilled in the art that the present application can be implemented by software and necessary general hardware, and certainly can be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a grid device) to execute the methods described in the embodiments of the present application.
It should be noted that, in the embodiment of the power transmission control device, the included units and modules are merely divided according to the functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the application.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims (10)

1. A power transmission control method characterized by comprising:
when a driver steps on an accelerator, determining theoretical input torque of a gearbox according to the theoretical rotating speed of an engine;
determining whether a theoretical input torque of the gearbox is greater than a limit torque of the gearbox; if yes, controlling the engine to operate at a target rotating speed; if not, controlling the engine to run at the theoretical rotating speed; the target rotational speed is less than the theoretical rotational speed.
2. The method of claim 1, wherein said controlling said engine to operate at a target speed comprises:
determining a target rotating speed of the engine according to the theoretical input torque of the gearbox and the limiting torque of the gearbox;
and sending a first control message to the engine, wherein the first control message comprises the target rotating speed.
3. The method of claim 1, wherein determining a theoretical input torque of the gearbox based on the theoretical rotational speed comprises:
determining theoretical input torque of the torque converter according to the theoretical rotating speed and characteristic parameters of the torque converter, wherein the characteristic parameters comprise effective ring diameter and torque coefficient;
and determining the theoretical input torque of the gearbox according to the theoretical input torque of the torque converter and the torque ratio of the torque converter.
4. The method of claim 3, wherein determining a theoretical input torque of the torque converter based on the theoretical rotational speed and a characteristic parameter of the torque converter comprises:
calculating formula T according to input torque of torque converterB＝ρgn2D5λ, determining a theoretical input torque of said torque converter, wherein TBThe torque converter is characterized by representing theoretical input torque of the torque converter, rho represents density of a liquid medium in the torque converter, g represents gravity acceleration, n represents theoretical rotating speed of an engine, D represents effective annular diameter of the torque converter, and lambda represents torque coefficient of the torque converter.
5. The method of claim 3, wherein determining the theoretical input torque of the transmission based on the theoretical input torque of the torque converter and a torque ratio of the torque converter comprises:
calculating formula T according to input torque of gearboxE＝KTBDetermining a theoretical input torque of said gearbox, wherein TERepresenting the theoretical input torque of the gearbox, K representing the torque ratio of the torque converter, TBIs the theoretical input torque of the torque converter.
6. A method according to any of claims 1-5, characterised in that before determining the theoretical input torque of the gearbox on the basis of the theoretical rotational speed of the engine, the method further comprises:
acquiring an opening value of the accelerator;
and determining the theoretical rotating speed of the engine according to the corresponding relation between the opening degree of the accelerator and the rotating speed of the engine.
7. The method of any of claims 1-5, wherein said controlling said engine to operate at said theoretical rotational speed comprises:
and sending a second control message to the engine, wherein the second control message comprises the theoretical rotating speed.
8. A power transmission control device characterized by comprising:
the first processing module is used for determining theoretical input torque of the gearbox according to the theoretical rotating speed of the engine when a driver steps on an accelerator;
the second processing module is used for determining whether the theoretical input torque of the gearbox is larger than the limit torque of the gearbox; if yes, controlling the engine to operate at a target rotating speed; if not, controlling the engine to run at the theoretical rotating speed; the target rotational speed is less than the theoretical rotational speed.
9. A vehicle comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements a power transmission control method as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements a power transmission control method according to any one of claims 1-7.
CN202010915260.7A 2020-09-03 2020-09-03 Power transmission control method, device, vehicle and storage medium Pending CN112061109A (en)

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