Method, apparatus, and device for calculating upshift point of AMT hybrid gearbox

Abstract

A method, an apparatus, and a device for calculating an upshift point of an AMT hybrid gearbox. The method comprises: obtaining oil-driven fuel consumption rate curves related to torque and rotational speed when an AMT hybrid gearbox performs gear shift operations in a fuel drive mode; obtaining power-generation fuel consumption rate curves related to torque and rotational speed during gear shift operations in a power-generation drive mode; obtaining a target shift gear, a power-generation power of an engine, a total power, a current rotational speed, and a current torque in a hybrid mode; and on the basis of the proportion of the power-generation power of the engine in the total power, the rotational speed, and the torque, performing interpolation between the oil-driven fuel consumption rate curve and the power-generation fuel consumption rate curve corresponding to the target shift gear, and determining a gear shift rotational speed. For the driving condition of the hybrid mode, the optimal shift point position for the hybrid mode at this time can be determined between the two extreme cases on the basis of the proportion of the power-generation power of the engine in the total power under the hybrid mode; that is, the optimal shift rotational speed can be determined.

Description

AMT hybrid transmission upshift point calculation method, device and equipment TECHNICAL FIELD

[0001] The present application relates to the field of AMT hybrid transmission shifting technology, in particular to an AMT hybrid transmission upshift point calculation method, device and equipment. BACKGROUND

[0002] With the increasing popularity of hybrid vehicles, the popularity rate is gradually increasing, and the requirements for hybrid vehicles are gradually increasing. Among them, how to ensure that the hybrid vehicle runs at the current vehicle speed with a lower energy consumption is one of the technologies that production enterprises are concerned about.

[0003] In related technologies, there is a method for determining a shift rule: taking the upshift pedal opening as the basis, fitting the engine speed curve, calculating the speed of each pedal opening to obtain the upshift speed curve; according to the fixed time length and the upshift line speed, the downshift speed point is calculated, and the downshift speed line is obtained, and the upshift speed line and the downshift speed line form a shift rule.

[0004] However, the above-mentioned technology needs to collect multiple sets of test data for calculation, and under different upshift speed determination principles, multiple sets of accelerator pedal opening, different gear speed points and specific fuel consumption test are needed, so as to obtain the upshift speed point and further obtain the upshift engine speed; in order to avoid accidental factors or errors, multiple sets of test data are needed to obtain the average value; the huge workload, high cost and lagging work development will bring great difficulties to the calibration and development work. SUMMARY

[0005] The present application provides an AMT hybrid transmission upshift point calculation method, device and equipment, which can solve the problems existing in the above-mentioned prior art.

[0006] In a first aspect, the present application provides an AMT hybrid transmission upshift point calculation method, which adopts the following technical scheme:

[0007] An AMT hybrid transmission upshift point calculation method, the AMT hybrid transmission upshift point calculation method comprising:

[0008] Obtaining the fuel consumption rate curve of torque and speed of the AMT hybrid transmission when each gear switching operation is performed in the fuel driving mode;

[0009] Obtaining the fuel consumption rate curve of torque and speed of the AMT hybrid transmission when each gear switching operation is performed in the fuel driving mode;

[0010] Obtaining the target switching gear of the AMT hybrid transmission, the power generation power of the engine, the total power, the current speed and the current torque in the hybrid mode.

[0011] According to the proportion of the power generation of the engine in the total power, the rotating speed and the torque, the shift rotating speed when shifting to the target shift gear is determined by interpolation between the oil-driven fuel consumption rate curve corresponding to the target shift gear and the power generation fuel consumption rate curve.

[0012] In combination with the first aspect, in an implementation, the oil-driven fuel consumption rate curve of the AMT hybrid transmission with respect to the torque and the rotating speed when performing each gear shift operation in the fuel-driven mode comprises the following steps:

[0013] The fuel consumption rate of the engine at different torques in the fuel mode is obtained to form a constant-torque oil-driven fuel consumption map, wherein the constant-torque oil consumption map comprises a plurality of fuel consumption rate curves of the engine at different gears at the torque.

[0014] The fuel consumption rate and the shift rotating speed of each shift point at the corresponding torque are obtained according to the intersection of the fuel consumption rate curves in the constant-torque oil consumption map.

[0015] The fuel consumption rate curve of the AMT hybrid transmission with respect to the torque and the rotating speed when performing each gear shift operation in the fuel mode is obtained according to the fuel consumption rate and the rotating speed of each shift point at different torques.

[0016] In combination with the first aspect, in an implementation, the power generation fuel consumption rate curve of the AMT hybrid transmission with respect to the torque and the rotating speed when performing each gear shift operation in the power generation mode comprises the following steps:

[0017] The thermal efficiency of the engine at different torques in the fuel mode is obtained according to the fuel consumption rate of the engine at different torques in the fuel mode.

[0018] The power generation efficiency of the engine at different torques in the power generation mode is obtained.

[0019] The equivalent fuel consumption rate of the engine at different torques in the power generation mode is determined according to the power generation efficiency of the engine at different torques in the power generation mode, and a constant-torque power generation equivalent fuel consumption map corresponding to the torque is formed, wherein the constant-torque power generation equivalent fuel consumption map comprises a plurality of equivalent fuel consumption rate curves of the engine at different gears at the torque.

[0020] The equivalent fuel consumption rate and the shift rotating speed of each shift point at the corresponding torque are obtained according to the intersection of the equivalent fuel consumption rate curves in the constant-torque power generation equivalent fuel consumption map.

[0021] According to the equivalent fuel consumption rates and the rotation speeds of each shift point under different torques, the fuel consumption rate curves about torque and rotation speed respectively when the AMT hybrid transmission performs each gear shift operation in the power generation mode are obtained.

[0022] In combination with the first aspect, in an implementation manner, the equivalent fuel consumption rates of the engine under different torques in the power generation mode are determined according to the power generation efficiencies of the engine under different torques in the power generation mode, and the following formula is adopted: η=(1000*3600) / (Q*be) be1=η1 / η*be

[0023] In the formula, η is the thermal efficiency of the engine in the driving working condition, η1 is the power generation efficiency of the engine, be is the fuel consumption rate of the engine, be1 is the equivalent fuel consumption rate, and Q is the heat value of the oil used by the engine.

[0024] In combination with the first aspect, in an implementation manner, the shift rotation speed when shifting to the target shift gear is determined by interpolation between the oil-driven fuel consumption rate curve and the power generation fuel consumption rate curve according to the proportion of the power generation power of the engine in the total power, the rotation speed and the torque, and the following steps are included:

[0025] According to the target shift gear, the corresponding oil-driven fuel consumption rate curve and the power generation fuel consumption rate curve are determined;

[0026] According to the torque, the oil-driven shift rotation speed corresponding to the oil-driven fuel consumption rate curve and the power generation shift rotation speed corresponding to the power generation fuel consumption rate curve are determined;

[0027] The shift rotation speed when shifting to the target shift gear in the hybrid mode is obtained according to the proportion of the power generation power of the engine in the total power, the oil-driven shift rotation speed and the power generation shift rotation speed.

[0028] In combination with the first aspect, in an implementation manner, the shift rotation speed when shifting to the target shift gear in the hybrid mode is obtained according to the proportion of the power generation power of the engine in the total power, the oil-driven shift rotation speed and the power generation shift rotation speed, and the following formula is adopted: s=Pc / Pt N=s*Nc+(1-s)*Nt

[0029] In the formula, N is the shift rotation speed when shifting to the target shift gear in the hybrid mode, Pc is the power generation power, Pt is the total power, Nc is the power generation shift rotation speed, and Nt is the oil-driven shift rotation speed.

[0030] The second aspect provides an AMT hybrid transmission upshift point calculation device, which adopts the following technical scheme:

[0031] An AMT hybrid transmission upshift point calculation device, comprising:

[0032] An acquisition module configured to acquire oil consumption rate curves about torque and speed respectively when the AMT hybrid transmission performs each gear shifting operation in fuel drive mode; and to acquire power generation oil consumption rate curves about torque and speed respectively when the AMT hybrid transmission performs each gear shifting operation in power generation drive mode.

[0033] A collection module configured to acquire a target switching gear of the AMT hybrid transmission, power generation power of the engine, total power, current speed and current torque in hybrid mode.

[0034] A shift calculation module configured to determine a shift speed when switching to the target switching gear by interpolation between the oil drive oil consumption rate curve and the power generation oil consumption rate curve corresponding to the target switching gear according to a proportion of the power generation power of the engine in the total power, the speed and the torque.

[0035] In combination with the second aspect, in an embodiment, the acquisition module comprises:

[0036] A first processing unit configured to acquire oil consumption rates of the engine respectively corresponding to a plurality of different torques in fuel mode, forming a constant torque oil consumption map; wherein the constant torque oil consumption map comprises a plurality of oil consumption rate curves when the engine runs at different gears at the torque; obtaining oil consumption rates and shift speeds of each shift point corresponding to the torque according to intersection points of the oil consumption rate curves in the constant torque oil consumption map; and obtaining oil consumption rate curves about torque and speed respectively when the AMT hybrid transmission performs each gear shifting operation in fuel mode according to the oil consumption rates and shift speeds of each shift point corresponding to different torques.

[0037] In combination with the second aspect, in an embodiment, the acquisition module comprises:

[0038] The second processing unit is configured to obtain the thermal efficiency of the engine in the fuel mode corresponding to a plurality of different torques respectively according to the fuel consumption rate of the engine in the fuel mode corresponding to the plurality of different torques respectively, obtain the power generation efficiency of the engine in the power generation mode corresponding to the plurality of different torques respectively, determine the equivalent fuel consumption rate of the engine in the power generation mode corresponding to the plurality of different torques respectively according to the power generation efficiency of the engine in the power generation mode corresponding to the plurality of different torques respectively, and form a constant-torque power generation equivalent fuel consumption map corresponding to the torque; wherein the constant-torque power generation equivalent fuel consumption map includes a plurality of equivalent fuel consumption rate curves of the engine running at different gears at the torque; the equivalent fuel consumption rate and the gear shifting speed of each gear shifting point at the torque are obtained according to the intersection of the equivalent fuel consumption rate curves in the constant-torque power generation equivalent fuel consumption map; and the fuel consumption rate curve about the torque and the speed of each gear shifting operation of the AMT hybrid transmission in the power generation mode is obtained according to the equivalent fuel consumption rate and the speed of each gear shifting point at different torques.

[0039] In a third aspect, an AMT hybrid transmission upshift point calculation device is provided, and the technical scheme is as follows:

[0040] An AMT hybrid transmission upshift point calculation device, comprising a processor, a memory, and an AMT hybrid transmission upshift point calculation program stored in the memory and executable by the processor, wherein when the AMT hybrid transmission upshift point calculation program is executed by the processor, the steps of the AMT hybrid transmission upshift point calculation method are implemented.

[0041] In a fourth aspect, a computer readable storage medium is provided, and the technical scheme is as follows:

[0042] A computer readable storage medium, wherein the AMT hybrid transmission upshift point calculation program is stored in the computer readable storage medium, and when the AMT hybrid transmission upshift point calculation program is executed by a processor, the steps of the AMT hybrid transmission upshift point calculation method are implemented.

[0043] The technical scheme provided by the embodiments of the present application has the following beneficial effects:

[0044] By acquiring the oil-driven fuel consumption rate curves about torque and speed when the engine switches between gears in the pure oil fuel driving mode, and the power generation fuel consumption rate curves about torque and speed when the engine switches between gears in the power generation driving mode, the fuel consumption rate of the two extreme cases in various driving conditions is obtained. Then, for a certain hybrid driving mode, only the proportion of the engine power generation power in the total power in the hybrid mode is needed to determine the optimal shift point position in the two extreme cases, that is, to determine the optimal shift speed. Compared with the prior art, the calculation efficiency of the shift point in the hybrid mode is greatly improved without complex calculation. BRIEF DESCRIPTION OF DRAWINGS

[0045] Fig. 1 is a flowchart of an embodiment of the AMT hybrid transmission upshift point calculation method of the present application;

[0046] Fig. 2 is a schematic diagram of the oil-driven fuel consumption rate curve and the power generation fuel consumption rate curve when the gear switches in the AMT hybrid transmission upshift point calculation method of the present application;

[0047] Fig. 3 is a functional module diagram of an embodiment of the AMT hybrid transmission upshift point calculation device of the present application;

[0048] Fig. 4 is a schematic diagram of the hardware structure of the AMT hybrid transmission upshift point calculation device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0050] First, some technical terms in the present application are explained and described to facilitate understanding of the present application by those skilled in the art.

[0051] With the increasing popularity of hybrid vehicles, the demand for hybrid vehicles is gradually increasing. One of the current concerns of manufacturers is how to ensure that the hybrid vehicle drives at a lower energy consumption at the current speed.

[0052] In the related art, there is a shift schedule determination method: taking the upshift vehicle speed pedal opening as the reference, fitting the engine speed curve, calculating the speed of each pedal opening to obtain the upshift vehicle speed curve; calculating the downshift speed point according to the fixed time length and the upshift line vehicle speed, and obtaining the downshift speed line, to form the shift schedule with the upshift speed line and the downshift speed line.

[0053] However, the above-mentioned technology needs to collect multiple sets of test data for calculation, and under different upshift vehicle speed determination principles, multiple sets of acceleration pedal opening, different speed points under each gear, and specific fuel consumption test are needed to obtain the upshift speed point and then the upshift engine speed; in order to avoid accidental factors or errors, multiple sets of test data are needed to obtain the average value; the huge workload, high cost, and lagging work development will bring great difficulties to the calibration development work.

[0054] Based on the above problems, the AMT hybrid transmission upshift point calculation method, device and equipment provided by the present application have the following invention points: by obtaining the oil-driven fuel consumption rate curve about torque and speed when the engine switches between each gear in the pure oil fuel driving mode and the power generation fuel consumption rate curve about torque and speed when the engine switches between each gear in the power generation driving mode, the fuel consumption rate of the two extreme cases under various driving conditions is obtained first, then for a certain driving condition under a hybrid mode, only the proportion of the engine power generation power in the total power under the hybrid mode is needed to determine the optimal shift point position of the hybrid mode between the two extreme cases, that is, to determine the optimal shift speed, which is more efficient and faster than the prior art, and greatly improves the calculation efficiency of the upshift point under the hybrid mode.

[0055] To make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in detail below with reference to the drawings.

[0056] In a first aspect, the embodiments of the present application provide an AMT hybrid transmission upshift point calculation method.

[0057] In an embodiment, referring to FIG. 1, FIG. 1 is a flowchart of the first embodiment of the AMT hybrid transmission upshift point calculation method of the present application. As shown in FIG. 1, the AMT hybrid transmission upshift point calculation method comprises:

[0058] S100, obtaining the oil-driven fuel consumption rate curve about torque and speed when the AMT hybrid transmission switches between each gear in the oil-driven mode;

[0059] S200, obtaining the power generation fuel consumption rate curve about torque and speed when the AMT hybrid transmission switches between each gear in the power generation mode;

[0060] S300, obtaining a target switching gear of an AMT hybrid transmission in a hybrid mode, a power generation of an engine, a total power, a current speed and a current torque;

[0061] S400, according to a proportion of the power generation of the engine in the total power, a speed and a torque, interpolating between the oil-driven fuel consumption rate curve corresponding to the target switching gear and the power generation fuel consumption rate curve to determine a gear shifting speed when switching to the target switching gear.

[0062] In the embodiment, by obtaining the oil-driven fuel consumption rate curve about torque and speed when each gear of the engine is switched in the pure oil fuel-driven mode and the power generation fuel consumption rate curve about torque and speed when each gear of the engine is switched in the power generation-driven mode, the fuel consumption rate of the two extreme cases in various driving conditions is obtained first, then for the driving condition in a certain hybrid mode, only according to the proportion of the power generation of the engine in the total power, the optimal gear shifting point position in the hybrid mode can be determined between the two extreme cases, that is, the optimal gear shifting speed is determined, which is more efficient and faster than the prior art, and the calculation efficiency of the gear shifting point in the hybrid mode is greatly improved.

[0063] Further, in an embodiment, the step S200 of obtaining the oil-driven fuel consumption rate curve about torque and speed when each gear of the AMT hybrid transmission is switched in the fuel-driven mode comprises the following steps:

[0064] S210, obtaining the fuel consumption rate of the engine corresponding to a plurality of different torques in the fuel mode to form a fixed-torque oil consumption map; wherein the fixed-torque oil consumption map includes a plurality of fuel consumption rate curves when the engine runs at different gears at the torque;

[0065] S220, obtaining the fuel consumption rate and the gear shifting speed of each gear shifting point at the corresponding torque according to the intersection of the fuel consumption rate curve in the fixed-torque oil consumption map;

[0066] S230, obtaining the fuel consumption rate curve about torque and speed when each gear of the AMT hybrid transmission is switched in the fuel-driven mode according to the fuel consumption rate and the speed of each gear shifting point at different torques.

[0067] Specifically, the torque of the engine in the fuel mode is divided into multiple levels in step S210, and the fuel consumption rates of different gears running at different speeds are collected at each torque. Then, multiple fixed-torque fuel consumption maps corresponding to the number of torque levels can be obtained. For example, the fixed-torque fuel consumption map at 700 torque includes the fuel consumption rate curves of the engine running at different speeds in each gear. The intersection of the curves corresponding to two adjacent gears is the shift point at the torque. Then, in step S230, the fuel consumption rates and speeds of each shift point at different torques are combined to obtain the fuel consumption rate curves of the AMT hybrid transmission with respect to torque and speed when each gear is switched, for example, referring to FIG. 2, when gear 1 is switched to gear 2, the intersection data of gear 1 switched to gear 2 in step S220 is connected as a coordinate point in the new coordinate system (torque and speed as horizontal and vertical coordinates) established in step S230 to obtain a fuel consumption rate curve (shown as a yellow curve in FIG. 2) corresponding to different fuel consumption rates (ring value in FIG. 2) at different torques and speeds when gear 1 is switched to gear 2. Finally, the fuel consumption rate curves at different driving conditions when each gear is switched are completed in step S230.

[0068] Further, in an embodiment, the step S300 of obtaining the power generation fuel consumption rate curves of the AMT hybrid transmission with respect to torque and speed when each gear is switched in the power generation mode includes the following steps:

[0069] S310, obtaining the thermal efficiency of the engine at multiple different torques in the fuel mode according to the fuel consumption rates corresponding to the engine at the multiple different torques in the fuel mode;

[0070] S320, obtaining the power generation efficiency of the engine at multiple different torques in the power generation mode;

[0071] S330, determining the equivalent fuel consumption rate of the engine at multiple different torques in the power generation mode according to the power generation efficiency of the engine at the multiple different torques in the power generation mode, and forming a fixed-torque power generation equivalent fuel consumption map corresponding to the torque; wherein the fixed-torque power generation equivalent fuel consumption map includes multiple equivalent fuel consumption rate curves of the engine running at different gears at the torque;

[0072] S340, obtaining the equivalent fuel consumption rate and shift speed of each shift point at the corresponding torque according to the intersection of the equivalent fuel consumption rate curves in the fixed-torque power generation equivalent fuel consumption map;

[0073] S350, obtaining the fuel consumption rate curve about torque and speed respectively when the AMT hybrid transmission performs gear shifting operation in the power generation mode according to the equivalent fuel consumption rate and speed of each shift point under different torques.

[0074] In this embodiment, in order to compare the fuel consumption rate in the power generation mode with the fuel consumption rate in the oil drive mode, the power provided by the two modes, i.e. the thermal efficiency, needs to be aligned, that is, steps S310-S330. After alignment, the fuel consumption rate curve about torque and speed respectively when the AMT hybrid transmission performs gear shifting operation in the power generation mode can be obtained according to the same principle as steps S210-S230 (as shown by the black curve in FIG. 2).

[0075] Specifically, step S330, determining the equivalent fuel consumption rate of the engine under multiple different torques in the power generation mode according to the power generation efficiency of the engine under multiple different torques in the power generation mode, uses the following formula: η = (1000 * 3600) / (Q * be) be1 = η1 / η * be

[0076] In the formula, η is the thermal efficiency of the engine in the driving mode, η1 is the power generation efficiency of the engine, be is the fuel consumption rate of the engine, be1 is the equivalent fuel consumption rate, and Q is the heat value of the oil used by the engine.

[0077] Further, in some embodiments, step S400, according to the proportion of the power generation power of the engine in the total power, the speed and the torque, interpolating between the oil drive fuel consumption rate curve and the power generation fuel consumption rate curve corresponding to the target shift gear, determines the shift speed when shifting to the target shift gear, including the following steps:

[0078] S410, determining the oil drive fuel consumption rate curve and the power generation fuel consumption rate curve corresponding to the target shift gear; for example, when the target shift gear is from 1st gear to 2nd gear, first find the oil drive fuel consumption rate curve and the power generation fuel consumption rate curve corresponding to the two extreme working conditions, at this time, the fuel consumption rate of each driving mode when shifting from 1st gear to 2nd gear in the hybrid mode falls between the two.

[0079] S420, determining the oil drive shift speed in the oil drive fuel consumption rate curve and the power generation shift speed in the power generation fuel consumption rate curve according to the torque;

[0080] S430, according to the proportion of the power generation power of the engine in the total power, the oil drive shift speed and the power generation shift speed, the shift speed when shifting to the target shift gear in the hybrid mode can be obtained.

[0081] Specifically, step S430 takes the following formula: s=Pc / Pt N=s*Nc+(1-s)*Nt

[0082] In the formula, N is the shift speed when switching to the target switching gear in the hybrid mode, Pc is the power generation, Pt is the total power, Nc is the power generation shift speed, and Nt is the oil drive shift speed.

[0083] In a second aspect, the embodiments of the present application also provide an AMT hybrid transmission upshift point calculation device.

[0084] In an embodiment, referring to FIG. 2, which is a functional module schematic diagram of an embodiment of the AMT hybrid transmission upshift point calculation device, the AMT hybrid transmission upshift point calculation device includes:

[0085] The acquisition module is configured to acquire oil consumption rate curves about torque and speed respectively when the AMT hybrid transmission performs gear switching operations in the fuel drive mode, and to acquire power generation oil consumption rate curves about torque and speed respectively when the AMT hybrid transmission performs gear switching operations in the power generation drive mode.

[0086] The collection module is configured to acquire the target switching gear of the AMT hybrid transmission, the power generation of the engine, the total power, the current speed, and the current torque in the hybrid mode.

[0087] The shift calculation module is configured to determine the shift speed when switching to the target switching gear by interpolation between the oil consumption rate curve and the power generation oil consumption rate curve corresponding to the target switching gear according to the proportion of the power generation of the engine in the total power, the speed, and the torque.

[0088] Further, in an embodiment, the acquisition module includes:

[0089] The first processing unit is configured to acquire the oil consumption rate corresponding to the engine at different torques in the fuel mode to form a constant torque oil consumption rate map, wherein the constant torque oil consumption rate map includes a plurality of oil consumption rate curves when the engine runs at different gears at the torque; the intersection of the oil consumption rate curves in the constant torque oil consumption rate map is used to obtain the oil consumption rate and the shift speed of each shift point at the corresponding torque; and the oil consumption rate and the speed of each shift point at different torques are used to obtain the oil consumption rate curves about torque and speed respectively when the AMT hybrid transmission performs gear switching operations in the fuel mode.

[0090] The second processing unit is configured to obtain the thermal efficiency of the engine in the fuel mode corresponding to a plurality of different torques respectively according to the fuel consumption rate of the engine in the fuel mode corresponding to the plurality of different torques respectively, obtain the power generation efficiency of the engine in the power generation mode corresponding to the plurality of different torques respectively, determine the equivalent fuel consumption rate of the engine in the power generation mode corresponding to the plurality of different torques respectively according to the power generation efficiency of the engine in the power generation mode corresponding to the plurality of different torques respectively, and form a constant-torque power generation equivalent fuel consumption map corresponding to the torque; wherein the constant-torque power generation equivalent fuel consumption map includes a plurality of equivalent fuel consumption rate curves of the engine running at different gears at the torque; the equivalent fuel consumption rate and the gear shifting speed of each gear shifting point at the torque are obtained according to the intersection of the equivalent fuel consumption rate curves in the constant-torque power generation equivalent fuel consumption map; and the fuel consumption rate curves about the torque and the speed respectively when the AMT hybrid transmission performs gear shifting operations at different gears in the power generation mode are obtained according to the equivalent fuel consumption rate and the speed of each gear shifting point at different torques.

[0091] The functions of the modules in the AMT hybrid transmission upshift point calculation device correspond to the steps in the AMT hybrid transmission upshift point calculation method, and the functions and implementation processes are not repeated here.

[0092] In a third aspect, an AMT hybrid transmission upshift point calculation device is provided. The AMT hybrid transmission upshift point calculation device can be a personal computer (PC), a notebook computer, a server, or other device with data processing function.

[0093] Referring to FIG. 4, FIG. 4 is a schematic diagram of the hardware structure of the AMT hybrid transmission upshift point calculation device. In the present application, the AMT hybrid transmission upshift point calculation device can include a processor, a memory, a communication interface, and a communication bus.

[0094] The communication bus can be of any type, used to interconnect the processor, the memory, and the communication interface.

[0095] The communication interface includes an input / output (I / O) interface, a physical interface, and a logical interface, and other interfaces used to interconnect the devices inside the AMT hybrid transmission upshift point calculation device, and interfaces used to interconnect the AMT hybrid transmission upshift point calculation device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber interface, an ATM interface, etc.; the user device can be a display (Display), a keyboard (Keyboard), etc.

[0096] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), and the like.

[0097] The processor can be a general-purpose processor, which can invoke the AMT hybrid transmission upshift point calculation program stored in the memory and execute the AMT hybrid transmission upshift point calculation method provided by the embodiments of the present application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the AMT hybrid transmission upshift point calculation program is invoked can refer to the embodiments of the AMT hybrid transmission upshift point calculation method of the present application, which will not be described here.

[0098] Those skilled in the art can understand that the hardware structure shown in FIG. 4 does not constitute a limitation on the present application, and can include more or fewer components than those shown, or combine certain components, or different component arrangements.

[0099] In a fourth aspect, the embodiments of the present application also provide a computer readable storage medium.

[0100] The computer readable storage medium of the present application stores the AMT hybrid transmission upshift point calculation program, wherein when the AMT hybrid transmission upshift point calculation program is executed by the processor, the steps of the AMT hybrid transmission upshift point calculation method as described above are implemented.

[0101] The method implemented when the AMT hybrid transmission upshift point calculation program is executed can refer to the embodiments of the AMT hybrid transmission upshift point calculation method of the present application, which will not be described here.

[0102] It should be noted that the above-mentioned sequence numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0103] The terms “include,” “comprise,” “have,” and any variations thereof, in the Specification and in the Claims of the present application, and the above-mentioned drawings, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that includes a list of steps or units is not limited to the listed steps or units, but can optionally further include steps or units not listed, or can optionally further include other steps or units inherent to such processes, methods, products, or devices. The terms “first”, “second”, and “third” and the like descriptions are used to distinguish different objects, and do not represent the order or limit the types of “first”, “second”, and “third”.

[0104] In the description of the embodiments of the present application, “exemplary”, “for example”, or “for instance” is used to represent an example, illustration, or description. Any embodiment or design scheme described as “exemplary”, “for example”, or “for instance” in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words “exemplary”, “for example”, or “for instance” are intended to present the relevant concept in a specific manner.

[0105] In the description of the embodiments of the present application, unless otherwise specified, “ / ” represents the meaning of or, for example, A / B can represent A or B; “and / or” in the text only represents a description of the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. In addition, in the description of the embodiments of the present application, “multiple” means two or more than two.

[0106] In some of the processes described in the embodiments of the present application, a plurality of operations or steps are included in a specific order, but it should be understood that these operations or steps can be executed or performed in parallel or in an order different from that in which they appear in the embodiments of the present application. The serial number of the operation is only used to distinguish different operations, and the serial number itself does not represent any execution order. In addition, these processes can include more or fewer operations, and these operations or steps can be executed in sequence or in parallel, and these operations or steps can be combined.

[0107] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by means of software and a general hardware platform as required, of course, it can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, an optical disk) as described above, and includes a plurality of instructions for causing a terminal device to execute the methods described in the embodiments of the present application.

[0108] The preferred embodiments of the present application have been described above with the illustrated embodiments, and are not intended to limit the scope of patent protection for the present application. Any equivalent structure or equivalent process variations, which directly or indirectly incorporate the contents of the specification and drawings of the present application, are also intended to be included within the scope of patent protection for the present application.

Claims

1. An AMT hybrid transmission upshift point calculation method, characterized in that, The AMT hybrid transmission upshift point calculation method comprises: Obtain the oil drive fuel consumption rate curves about torque and speed when the AMT hybrid transmission performs each gear switching operation in the fuel drive mode; Obtain the power generation fuel consumption rate curves about torque and speed when the AMT hybrid transmission performs each gear switching operation in the power generation drive mode; Obtain the target switching gear of the AMT hybrid transmission, the power generation power of the engine, the total power, the current speed and the current torque in the hybrid mode; According to the proportion of the power generation power of the engine in the total power, the speed and the torque, the oil drive fuel consumption rate curve and the power generation fuel consumption rate curve corresponding to the target switching gear, the switching speed when switching to the target switching gear is determined by interpolation.

2. The AMT hybrid transmission upshift point calculation method of claim 1, wherein, The method for obtaining the oil drive fuel consumption rate curves about torque and speed when the AMT hybrid transmission performs each gear switching operation in the fuel drive mode comprises the following steps: Obtain the fuel consumption rate of the engine corresponding to a plurality of different torques in the fuel mode to form a constant torque oil consumption rate map; wherein the constant torque oil consumption rate map comprises a plurality of fuel consumption rate curves when the engine runs at different gears at the torque. According to the intersection of the fuel consumption rate curves in the constant torque oil consumption rate map, obtain the fuel consumption rate and the switching speed of each switching point corresponding to the torque. According to the fuel consumption rate and the speed of each switching point at different torques, obtain the fuel consumption rate curves about torque and speed when the AMT hybrid transmission performs each gear switching operation in the fuel mode.

3. The AMT hybrid transmission upshift point calculation method of claim 2, wherein, The method for obtaining the power generation fuel consumption rate curves about torque and speed when the AMT hybrid transmission performs each gear switching operation in the power generation drive mode comprises the following steps: According to the fuel consumption rate of the engine corresponding to a plurality of different torques in the fuel mode, obtain the thermal efficiency of the engine corresponding to a plurality of different torques in the fuel mode. Obtain the power generation efficiency of the engine corresponding to a plurality of different torques in the power generation mode. According to the power generation efficiency of the engine corresponding to a plurality of different torques in the power generation mode, determine the equivalent fuel consumption rate of the engine corresponding to a plurality of different torques in the power generation mode, and form a constant torque power generation equivalent oil consumption map corresponding to the torque; wherein the constant torque power generation equivalent oil consumption map comprises a plurality of equivalent fuel consumption rate curves when the engine runs at different gears at the torque. According to the intersection of the equivalent fuel consumption rate curves in the constant torque power generation equivalent oil consumption map, obtain the equivalent fuel consumption rate and the switching speed of each switching point corresponding to the torque. According to the equivalent fuel consumption rate and the speed of each switching point at different torques, obtain the fuel consumption rate curves about torque and speed when the AMT hybrid transmission performs each gear switching operation in the power generation mode.

4. The AMT hybrid transmission upshift point calculation method of claim 3, wherein, The formula for determining the equivalent fuel consumption rate of the engine corresponding to a plurality of different torques in the power generation mode according to the power generation efficiency of the engine corresponding to a plurality of different torques in the power generation mode is as follows: In the formula, η is the engine thermal efficiency under the driving condition, η1 is the engine power generation efficiency, be is the engine fuel consumption rate, be1 is the equivalent fuel consumption rate, and Q is the heat value of the engine driving oil.

5. The AMT hybrid transmission upshift point calculation method of claim 1, wherein, The shift speed of the AMT hybrid transmission when switching to the target switching gear is determined by interpolation between the oil-driven fuel consumption rate curve and the power generation fuel consumption rate curve corresponding to the target switching gear according to the proportion of the engine power generation in the total power, the speed and the torque. According to the target switching gear, the corresponding oil-driven fuel consumption rate curve and the power generation fuel consumption rate curve are determined. According to the torque, the oil-driven shift speed in the oil-driven fuel consumption rate curve and the power generation shift speed in the power generation fuel consumption rate curve are determined. The shift speed of the AMT hybrid transmission when switching to the target switching gear in the hybrid mode is obtained according to the proportion of the engine power generation in the total power, the oil-driven shift speed and the power generation shift speed.

6. The AMT hybrid transmission upshift point calculation method of claim 5, wherein, The shift speed of the AMT hybrid transmission when switching to the target switching gear in the hybrid mode is obtained according to the proportion of the engine power generation in the total power, the oil-driven shift speed and the power generation shift speed, and the following formula is adopted: s=Pc / Pt N=s*Nc+(1-s)*Nt In the formula, N is the shift speed of the AMT hybrid transmission when switching to the target switching gear in the hybrid mode, Pc is the power generation, Pt is the total power, Nc is the power generation shift speed, and Nt is the oil-driven shift speed.

7. An AMT hybrid transmission upshift point calculation device, characterized in that, The AMT hybrid transmission upshift point calculation device comprises: An acquisition module configured to acquire oil-driven fuel consumption rate curves about torque and speed when the AMT hybrid transmission performs gear switching operations in a fuel-driven mode, and to acquire power generation fuel consumption rate curves about torque and speed when the AMT hybrid transmission performs gear switching operations in a power generation-driven mode; A collection module configured to acquire a target switching gear of the AMT hybrid transmission, an engine power generation, a total power, a current speed and a current torque in a hybrid mode; A shift calculation module configured to determine the shift speed when switching to the target switching gear by interpolation between the oil-driven fuel consumption rate curve and the power generation fuel consumption rate curve corresponding to the target switching gear according to the proportion of the engine power generation in the total power, the speed and the torque.

8. The AMT hybrid transmission upshift point calculation apparatus of claim 7, wherein, The acquisition module comprises: A first processing unit configured to acquire fuel consumption rates corresponding to different torques of the engine in a fuel mode to form a constant-torque oil consumption map, wherein the constant-torque oil consumption map comprises a plurality of fuel consumption rate curves when the engine operates at different gears at the torque; the fuel consumption rate and the shift speed of each shift point at the corresponding torque are obtained according to the intersection of the fuel consumption rate curves in the constant-torque oil consumption map; and the fuel consumption rate curves about torque and speed when the AMT hybrid transmission performs gear switching operations in the fuel mode are obtained according to the fuel consumption rate and the speed of each shift point at different torques.

9. The AMT hybrid transmission upshift point calculation apparatus of claim 8, wherein, The acquisition module comprises: The second processing unit is configured to obtain the thermal efficiency of the engine in the fuel mode corresponding to a plurality of different torques respectively according to the fuel consumption rate of the engine in the fuel mode corresponding to the plurality of different torques respectively, obtain the power generation efficiency of the engine in the power generation mode corresponding to a plurality of different torques respectively, determine the equivalent fuel consumption rate of the engine in the power generation mode corresponding to a plurality of different torques respectively according to the power generation efficiency of the engine in the power generation mode corresponding to the plurality of different torques respectively, and form a constant-torque power generation equivalent fuel consumption map corresponding to the torque; wherein the constant-torque power generation equivalent fuel consumption map comprises a plurality of equivalent fuel consumption rate curves of the engine running at different gears at the torque; the equivalent fuel consumption rate and the gear shifting speed of each gear shifting point at the corresponding torque are obtained according to the intersection of the equivalent fuel consumption rate curves in the constant-torque power generation equivalent fuel consumption map; and the fuel consumption rate curves about torque and speed respectively when the AMT hybrid transmission performs gear shifting operations of each gear in the power generation mode are obtained according to the equivalent fuel consumption rate and the speed of each gear shifting point at different torques.

10. An AMT hybrid transmission upshift point calculation device, characterized in that, The AMT hybrid transmission upshift point calculation device comprises a processor, a memory, and an AMT hybrid transmission upshift point calculation program stored on the memory and executable by the processor, wherein when the AMT hybrid transmission upshift point calculation program is executed by the processor, the steps of the AMT hybrid transmission upshift point calculation method according to any one of claims 1 to 7 are implemented.

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