Am t shift control method

Abstract

The application discloses an AMT gear shifting control method, and relates to the field of gear shifting control, and comprises the following steps: acquiring information of a vehicle working state; the information of the vehicle working state comprises information of engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode and accessory power consumption; performing power domain assembly cooperative control according to the information of the engine fuel consumption, the transmission efficiency, the drive axle efficiency, the engine thermal management mode and the accessory power consumption, so as to reduce fuel consumption; wherein, gear shifting strategies are generated based on different engine thermal management modes, and vehicle dynamic control is performed; wherein, the accessory power consumption comprises power consumption of an air conditioner and engine accessories; and the vehicle dynamic control comprises superimposing vehicle dynamic control under the power consumption state of the air conditioner and the engine accessories.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of shift control, in particular to an AMT shift control method, an AMT shift control device, an electronic device, a storage medium and a vehicle. BACKGROUND

[0002] The economic index is one of the most important performance indicators in the development process of heavy commercial vehicles, and the fuel consumption level of heavy commercial vehicles determines the user's reputation and market performance to some extent. The AMT (Automatic Mechanical Transmission) is widely used in the field of heavy commercial vehicles due to its high transmission efficiency, low cost, high cost performance and other characteristics. The shift strategy is one of the key technologies of AMT, and the advantages and disadvantages of the shift strategy will directly affect the performance of the vehicle. Major vehicle and transmission manufacturers are actively conducting optimization research on shift strategies.

[0003] Patent document 1 (determination method and device for automatic transmission shift strategy-CN201811615297.7) discloses a method for determining the shift strategy of an automatic transmission. By selecting the engine speed and throttle opening of the shift point, and the corresponding relationship between the predetermined engine speed, engine torque and throttle opening, the engine torque is determined. The vehicle driving state is transferred to the engine universal characteristic for gear decision, so that the engine can work in the low fuel consumption rate area as much as possible, and the fuel economy is improved. However, this method only improves the economy by considering the engine performance parameters, without considering the influence of other powertrain parameters;

[0004] Patent document 2 (control method and device for shift strategy of AMT-CN201711346062.8) discloses a method for analyzing the vehicle state according to the throttle opening ratio, and updating the shift strategy based on the actual use of the vehicle, so that the engine works in a reasonable range to meet the actual driving conditions and the power demand of the driver. However, this method will occupy a large amount of TCU resources in the actual execution process, and the effect of improving the power performance is limited;

[0005] Patent document 3 (transmission gear control method, system and vehicle-CN 109751405 A) discloses a transmission gear control method, which uses engine load rate as the main parameter considered in transmission shift, calculates the engine real-time load rate under the current gear and corresponding engine speed, compares the engine real-time load rate under the current gear and corresponding engine speed with the engine ideal load rate under the current gear and corresponding engine speed, and controls the transmission gear according to the comparison result. The method realizes precise control of vehicle energy-saving shift and ensures the economy of the vehicle. However, this method also does not consider the influence of the entire powertrain on fuel consumption.

[0006] In summary, the current AMT shift strategy of heavy commercial vehicle is relatively simple, only considering the influence of shift strategy on engine performance, without considering the collaborative control of the whole powertrain. Therefore, a kind of AMT shift control scheme is needed to reduce the limitation of TCU calculation ability and complex algorithms such as neural network and fuzzy control, and to fully tap the potential of vehicle fuel saving in the design stage. SUMMARY

[0007] The present application aims to provide an AMT shift control method, an AMT shift control device, an electronic device, a storage medium and a vehicle, which at least solve the problem of the influence of the whole powertrain on fuel consumption, and solve one of the technical problems of the influence of accessory power consumption on the whole powertrain control.

[0008] The present application provides the following solutions:

[0009] According to one aspect of the present application, an AMT shift control method is provided, comprising:

[0010] Obtaining information of vehicle working state;

[0011] The information of vehicle working state includes information of engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode and accessory power consumption;

[0012] According to the information of engine fuel consumption, transmission efficiency, drive axle efficiency and accessory power consumption, the powertrain collaborative control is performed to reduce fuel consumption;

[0013] Wherein, the shift strategy is generated based on different engine thermal management modes, and the vehicle dynamic control is performed.

[0014] Wherein, the accessory power consumption includes power consumption of air conditioner and engine accessories.

[0015] The vehicle dynamic control includes superimposing the vehicle dynamic control under the state of air conditioner and engine accessory power consumption.

[0016] Further, the power domain assembly cooperative control according to the information of engine fuel consumption, transmission efficiency, drive axle efficiency, accessory power consumption, comprising: a step of starting AMT shift control; a step of determining control target boundary; a step of confirming control boundary of each gear; a step of calculating transmission and drive axle speed of each gear; a step of interpolating drive axle efficiency of each gear; a step of calculating drive axle input torque of each gear; a step of interpolating transmission efficiency of each gear; a step of calculating transmission input torque of each gear; a step of calculating accessory and air conditioner power consumption; a step of calculating engine output torque of each gear; a step of confirming engine thermal management mode; a step of calculating engine fuel consumption; a step of calculating system fuel consumption loss of each gear; a step of solving system loss transfer of each gear; a step of calculating shift curve; and a step of ending AMT shift control.

[0017] Further, comprising:

[0018] In the step of determining control target boundary, the control target is set according to the information of current vehicle working state.

[0019] Based on the control target, the boundary condition is confirmed.

[0020] Further, comprising:

[0021] In the step of confirming control boundary of each gear, the assembly speed ratio relationship is obtained according to the information of current vehicle working state.

[0022] According to the assembly speed ratio relationship, the two-dimensional matrix conversion of vehicle speed-speed, torque of each gear is completed.

[0023] Further, comprising:

[0024] In the step of calculating transmission and drive axle speed of each gear, the transmission speed information and drive axle speed information are obtained based on the formula.

[0025] The formula comprises:

[0026] Gearbox_spd=v*60*gear_ratio*axle_ratio / (2*3.14*3.6*wheel_ratio);

[0027] Axle_spd=gearbox_spd / gear_ratio / axle_ratio;

[0028] Wherein,

[0029] Gearbox_spd is the transmission speed;

[0030] V is the vehicle speed of the control boundary;

[0031] gear_ratio is the current gear transmission ratio;

[0032] axle_ratio is the drive axle ratio;

[0033] wheel_ratio is the wheel rotation radius;

[0034] Axle_spd is the drive axle speed.

[0035] Further comprising:

[0036] In the step of each gear drive axle efficiency interpolation, the triangular partitioning algorithm is used to interpolate the efficiency and universal characteristic data;

[0037] The step of interpolation calculation includes obtaining the convex hull of the discrete points according to the discrete coordinates and referring to the convex hull algorithm;

[0038] Constructing a Delaunary triangular mesh;

[0039] According to the gridding method, the coordinates of the grid points are obtained, including gridding processing according to the control range of the discrete points and the node number of the longitudinal and transverse coordinates;

[0040] Traverse all the grid points in the interpolation area, and use a cubic equation to interpolate the value of the to-be-determined point coordinates according to the three points in the triangle where the interpolation point is located, so that the to-be-interpolated point is in the Delaunary triangle;

[0041] According to three points not on the same straight line, a plane is fitted, and the value of a point at any coordinate in the plane is calculated.

[0042] Further comprising:

[0043] In the step of calculating the input torque of each gear drive axle, the input torque of the drive axle is calculated based on the torque boundary and the drive axle efficiency.

[0044] Further comprising:

[0045] In the step of each gear transmission efficiency interpolation, the transmission output torque is calculated based on the drive axle input torque, and the transmission efficiency interpolation calculation is performed in combination with the transmission speed.

[0046] Further comprising:

[0047] In the step of calculating the input torque of each gear transmission, the input torque of the transmission is calculated from the results of each gear transmission efficiency interpolation and the transmission output torque.

[0048] Further comprising:

[0049] In the step of calculating the power consumption of the accessories and air conditioner, the consumed torques of each engine accessory and air conditioner are solved according to the engine speed and engine power.

[0050] Further, comprising:

[0051] In the step of calculating the engine output torque of each gear, the engine output torque result is generated by the transmission input torque and the accessory and air conditioner consumed torque conversion.

[0052] Further, comprising:

[0053] In the step of confirming the engine thermal management mode, different engine characteristic maps are determined based on the input engine thermal management mode state.

[0054] Further, comprising:

[0055] In the step of calculating the engine fuel consumption, the engine fuel consumption is calculated by interpolation based on the solved engine speed and engine output torque and the corresponding characteristic map of different engine thermal management modes.

[0056] Further, comprising:

[0057] In the step of calculating the system fuel consumption loss of each gear, the information of the system fuel consumption loss, system power loss, engine output power and drive axle output power of each gear is obtained based on the formula;

[0058] The formula includes:

[0059] System_loss = eng_fuel * power_loss / 1000;

[0060] power_loss = eng_power - axle_out_power;

[0061] eng_power = eng_spd * eng_torq / 9549;

[0062] axle_out_power = axle_spd * axle_out_torq / 9549;

[0063] wherein,

[0064] System_loss is the system fuel consumption loss of each gear;

[0065] eng_fuel is the engine fuel consumption;

[0066] power_loss is the system power loss of each gear;

[0067] eng_power is the engine output power of each gear;

[0068] axle_out_power is the drive axle output power of each gear;

[0069] eng_spd is the engine speed corresponding to each gear and vehicle speed;

[0070] eng_torq is the engine torque corresponding to each gear and torque;

[0071] axle_out_torq is the drive axle output torque corresponding to each gear and torque.

[0072] Further, comprising:

[0073] In the step of solving the system loss interface of each gear system, each adjacent gear system loss is plotted, and the system loss interface line is solved, which is the target curve of control.

[0074] Further, comprising:

[0075] In the step of calculating the shift curve, the system loss interface line solved in the step of solving the system loss interface of each gear system;

[0076] According to each speed ratio gear, the upshift and downshift lines are converted, and the vehicle control output is performed.

[0077] According to the two aspects of the present application, an AMT shift control device is provided, which comprises:

[0078] A state information module is configured to acquire information of a vehicle working state;

[0079] The information of the vehicle working state comprises information of engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption;

[0080] A cooperative control module is configured to perform power domain assembly cooperative control according to the information of engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption, so as to reduce fuel consumption;

[0081] A dynamic control module is configured to generate a shift strategy based on different engine thermal management modes, and perform vehicle dynamic control;

[0082] The accessory power consumption comprises power consumption of air conditioning and engine accessories.

[0083] The vehicle dynamic control comprises superimposed vehicle dynamic control under the state of air conditioning and engine accessory power consumption.

[0084] According to the three aspects of the present application, an electronic device is provided, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are in communication with each other through the communication bus.

[0085] The memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the AMT shift control method.

[0086] According to the four aspects of the present application, a computer readable storage medium is provided, comprising a computer program executable by an electronic device, and when the computer program is run on the electronic device, the electronic device executes the steps of the AMT shift control method.

[0087] According to the five aspects of the present application, a vehicle is provided, comprising:

[0088] An electronic device is used to implement the steps of the AMT shift control method.

[0089] A processor runs a program, and when the program is run, the data output from the electronic device executes the steps of the AMT shift control method.

[0090] A storage medium is used to store a program, and when the program is run, the data output from the electronic device executes the steps of the AMT shift control method.

[0091] Through the above-mentioned scheme, the following beneficial technical effects are obtained:

[0092] The present application realizes optimal energy consumption by comprehensively considering the power domain assembly cooperative control method of engine fuel consumption, transmission efficiency, drive axle efficiency and accessory power consumption.

[0093] The present application realizes whole vehicle dynamic control by generating different shift strategies based on different engine thermal management modes.

[0094] The present application realizes energy consumption control refinement by considering the influence of air conditioners and engine accessories, so that whole vehicle dynamic control is closer to the actual application scene of the vehicle.

[0095] The present application realizes shift rule optimization design of whole vehicle economy comprehensive performance by designing shift rules in the design stage, which is used to guide efficient and accurate product development and reduce the complexity of vehicle modification in the later stage. BRIEF DESCRIPTION OF DRAWINGS

[0096] Figure 1 is a flowchart of an AMT shift control method provided by one or more embodiments of the present application.

[0097] Figure 2It is a structural diagram of an AMT shift control device provided by one or more embodiments of the present application.

[0098] Figure 3 It is a schematic diagram of an optimization process of an AMT shift rule optimization design method for a commercial vehicle according to one specific embodiment of the present application.

[0099] Figure 4 It is a three-dimensional schematic diagram of a calculation result of a system loss boundary of adjacent gears according to one specific embodiment of the present application.

[0100] Figure 5 It is a two-dimensional schematic diagram of a calculation result of a system loss boundary of adjacent gears according to one specific embodiment of the present application.

[0101] Figure 6 It is an electronic device structural block diagram of an AMT shift control method provided by one or more embodiments of the present application. DETAILED DESCRIPTION

[0102] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. 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.

[0103] Figure 1 It is a flowchart of an AMT shift control method provided by one or more embodiments of the present application.

[0104] As shown in the AMT shift control method includes: Figure 1

[0105] Step A1, obtaining information of a vehicle working state;

[0106] The information of the vehicle working state includes information of engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption;

[0107] Step A2, based on the information of engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption, power domain assembly cooperative control is performed to reduce fuel consumption;

[0108] Step A3, generating a shift strategy based on different engine thermal management modes to perform vehicle dynamic control;

[0109] The accessory power consumption includes power consumption of air conditioning and engine accessories.

[0110] The vehicle dynamic control includes superimposing vehicle dynamic control under the state of air conditioning and engine accessory power consumption.

[0111] ​Specifically, by building a complete vehicle model and calculating the system's energy losses under different gear conditions, the system comprehensively considers engine fuel consumption, transmission and drive axle efficiency, engine thermal management mode, and accessory power consumption to achieve coordinated control of all powertrain components. By optimizing the shift strategy, the system achieves fuel savings for heavy-duty commercial vehicles under typical highway operating conditions.

[0112] In this embodiment, based on the information of engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption, the power domain assembly is collaboratively controlled, including: the steps of starting AMT shift control; determining the control target boundary; confirming the control boundary of each gear; calculating the transmission and drive axle speeds of each gear; interpolating the drive axle efficiency of each gear; calculating the drive axle input torque of each gear; interpolating the transmission efficiency of each gear; calculating the transmission input torque of each gear; calculating the power consumption of accessories and air conditioning; calculating the engine output torque of each gear; confirming the engine thermal management mode; calculating the engine fuel consumption; calculating the fuel consumption loss of each gear system; solving the loss handover of each gear system; calculating the shift curve; and ending AMT shift control.

[0113] Specifically, boundary conditions are identified based on the control objective. For example, dual-parameter shift control based on vehicle speed and throttle opening requires conversion to a two-dimensional distribution matrix with vehicle speed and engine torque as the boundaries. With torque as the boundary, the two-dimensional matrix of vehicle speed, speed, and torque for each gear is converted based on the assembly speed ratio, resulting in a three-dimensional graphical representation. When torque is input from the transmission, the consumption of accessories and air conditioning is converted into torque, and this portion of torque consumption is deducted to generate the engine output torque. Based on the input engine thermal management mode, different engine universal characteristics are determined. The universal characteristic curve is essentially a composite of all load and speed characteristic curves. It represents the relationship between the key engine parameters across the entire operating range and can be used to determine the most economical operating area of ​​the engine, as well as the minimum emission range for a particular pollutant. During the engine parameter matching process, these optimal performance areas are aligned to the most commonly used operating conditions. Furthermore, the universal characteristics corresponding to different engine thermal management modes are interpolated to calculate engine fuel consumption based on the calculated engine speed and output torque. A graph is drawn based on the system loss of each adjacent gear, and the system loss intersection line is solved, which is the target curve for control. Based on the system loss intersection line, the upshift and downshift lines are converted according to each speed ratio and gear, and the vehicle control output is performed to ensure that the vehicle runs in the most fuel-efficient state.

[0114] The step of starting the AMT shift control and the step of ending the AMT shift control can be used as an interface embedded in a certain large system. For example, in a system of a complete vehicle control method, a system of an AMT shift control method is embedded, when the system of the complete vehicle control method runs to the step of the AMT shift control method, an instruction of starting the AMT shift control is output, at the same time, the step of starting the AMT shift control acquires necessary operation data and promotes the flow of the AMT shift control method according to the received instruction of starting the AMT shift control, until the step of ending the AMT shift control is reached, the information of completing the flow of the AMT shift control method and the result data of the AMT shift control method are fed back to the system of the complete vehicle control method.

[0115] In the embodiment, the following steps are included:

[0116] In the step of determining the control target boundary, the control target is set according to the information of the current vehicle working state.

[0117] Based on the control target, the confirmation of the boundary condition is completed.

[0118] In the embodiment, the following steps are included:

[0119] In the step of confirming the control boundary of each gear, the assembly speed ratio relationship is acquired according to the information of the current vehicle working state.

[0120] According to the assembly speed ratio relationship, the two-dimensional matrix conversion of the vehicle speed-rotational speed-torque of each gear is completed.

[0121] In the embodiment, the following steps are included:

[0122] In the step of calculating the rotational speed of each gear transmission and drive axle, the transmission rotational speed information and the drive axle rotational speed information are acquired based on the formula.

[0123] The formula includes:

[0124] Gearbox_spd = v * 60 * gear_ratio * axle_ratio / (2 * 3.14 * 3.6 * wheel_ratio);

[0125] Axle_spd = gearbox_spd / gear_ratio / axle_ratio;

[0126] Wherein,

[0127] Gearbox_spd is the transmission rotational speed;

[0128] V is the vehicle speed of the control boundary;

[0129] gear_ratio is the current gear transmission speed ratio;

[0130] axle_ratio is the drive axle ratio;

[0131] wheel_ratio is the wheel radius of rotation;

[0132] Axle_spd is the drive axle speed.

[0133] In this embodiment, comprising:

[0134] In the step of each gear drive axle efficiency interpolation, the triangular subdivision algorithm is used to interpolate the efficiency and universal characteristic data;

[0135] The step of interpolation calculation includes obtaining the convex hull of the discrete points according to the discrete coordinates and referring to the convex hull algorithm;

[0136] Constructing a Delaunary triangular mesh;

[0137] According to the gridding method, the coordinates of the grid points are obtained, including gridding processing according to the control range of the discrete points and the node number of the longitudinal and transverse coordinates;

[0138] Traverse all the grid points in the interpolation area, and use a cubic equation to interpolate the value of the to-be-determined point coordinates according to the three points in the triangle where the interpolation point is located, so that the to-be-interpolated point is in the Delaunary triangle;

[0139] According to the three points not on the same straight line, a plane is fitted, and the value of the point at any coordinate in the plane is solved.

[0140] In this embodiment, comprising:

[0141] In the step of calculating the input torque of each gear drive axle, the drive axle input torque is calculated based on the torque boundary and the drive axle efficiency.

[0142] In this embodiment, comprising:

[0143] In the step of each gear transmission efficiency interpolation, the transmission output torque is calculated based on the drive axle input torque, and the transmission efficiency interpolation calculation is performed in combination with the transmission speed.

[0144] In this embodiment, comprising:

[0145] In the step of calculating the input torque of each gear transmission, the transmission input torque is calculated from the transmission efficiency interpolation result of each gear and the transmission output torque.

[0146] In this embodiment, comprising:

[0147] In the step of calculating the power consumption of accessories and air conditioner, the consumption torque of each engine accessory and air conditioner is solved according to the engine speed and engine power.

[0148] In the present embodiment, comprising:

[0149] In the step of calculating the engine output torque of each gear, the engine output torque result is generated by the transmission input torque, considering the accessory, air conditioning consumption torque conversion.

[0150] In the present embodiment, comprising:

[0151] In the step of confirming the engine thermal management mode, different engine characteristic maps are determined based on the input engine thermal management mode state.

[0152] In the present embodiment, comprising:

[0153] In the step of calculating the engine fuel consumption, the engine fuel consumption is calculated by interpolation based on the engine speed and the engine output torque solved from the different engine thermal management mode corresponding characteristic maps.

[0154] In the present embodiment, comprising:

[0155] In the step of calculating the system fuel consumption loss of each gear, the information of the system fuel consumption loss, the system power loss, the engine output power and the drive axle output power of each gear is obtained based on the formula;

[0156] The formula includes:

[0157] System_loss = eng_fuel * power_loss / 1000;

[0158] power_loss = eng_power - axle_out_power;

[0159] eng_power = eng_spd * eng_torq / 9549;

[0160] axle_out_power = axle_spd * axle_out_torq / 9549;

[0161] Wherein,

[0162] System_loss is the system fuel consumption loss of each gear;

[0163] eng_fuel is the engine fuel consumption;

[0164] power_loss is the system power loss of each gear;

[0165] eng_power is the engine output power of each gear;

[0166] axle_out_power is the output power of the drive axle of each gear;

[0167] eng_spd is the engine speed corresponding to each gear and vehicle speed;

[0168] eng_torq is the engine torque corresponding to each gear and torque;

[0169] axle_out_torq is the drive axle output torque corresponding to each gear and torque.

[0170] In the embodiment, the steps include:

[0171] In the step of solving the gear system loss interface, the system loss interface line is solved by drawing according to each adjacent gear system loss, which is the target curve of control.

[0172] In the embodiment, the steps include:

[0173] In the step of calculating the shift curve, the system loss interface line is solved based on the step of solving the gear system loss interface.

[0174] According to each speed ratio gear, the upshift and downshift lines are converted, and the vehicle control output is performed.

[0175] Figure 2 is a structural diagram of an AMT shift control device provided by one or more embodiments of the present application.

[0176] As shown in Figure 2 The AMT shift control device includes a state information module, a cooperative control module, and a dynamic control module.

[0177] The state information module is configured to obtain information of a vehicle working state.

[0178] The information of the vehicle working state includes information of engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption.

[0179] The cooperative control module is configured to perform power domain assembly cooperative control based on the information of engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption, so as to reduce fuel consumption.

[0180] The dynamic control module is configured to generate a shift strategy based on different engine thermal management modes, and perform vehicle dynamic control.

[0181] The accessory power consumption includes power consumption of an air conditioner and engine accessories.

[0182] The vehicle dynamic control includes superimposed vehicle dynamic control in the state of air conditioner and engine accessory power consumption.

[0183] It is worth noting that although the system only discloses the state information module, the cooperative control module and the dynamic control module, it does not mean that the device is limited to the above basic function modules, and relatively, the meaning expressed by the present application is that on the basis of the above basic function modules, the person skilled in the art can add one or more function modules to form infinite embodiments or technical solutions in combination with the prior art, that is, the system is open rather than closed, and the protection scope of the present application claimed cannot be limited to the above disclosed basic function modules because the present embodiment only discloses individual basic function modules.

[0184] Through the above scheme, the following beneficial technical effects are obtained:

[0185] The application realizes optimal energy consumption by comprehensively considering the power domain assembly cooperative control method of engine fuel consumption, transmission efficiency, drive axle efficiency and accessory power consumption.

[0186] The application realizes whole vehicle dynamic control by generating different shift strategies based on different engine thermal management modes.

[0187] The application realizes energy consumption control refinement by considering the influence of air conditioners and engine accessories, so that the whole vehicle dynamic control is closer to the actual application scene of the vehicle.

[0188] The application completes the shift rule optimization design of the comprehensive performance of the vehicle economy by designing the shift rule in the design stage, which is used to guide the efficient and accurate development of the product and reduce the complexity of the later vehicle modification.

[0189] Figure 3 It is a schematic diagram of the optimization process of the AMT shift rule optimization design method of the commercial vehicle of one specific embodiment of the present application.

[0190] Figure 4 It is a three-dimensional schematic diagram of the calculation results of the system loss boundary of adjacent gears of one specific embodiment of the present application.

[0191] Figure 5 It is a two-dimensional schematic diagram of the calculation results of the system loss boundary of adjacent gears of one specific embodiment of the present application.

[0192] Figure 6 It is a structure block diagram of an electronic device of the AMT shift control method provided by one or more embodiments of the present application.

[0193] In one specific embodiment, as shown in Figure 3 The optimization process of the AMT shift rule optimization design method of the commercial vehicle includes steps S1 to S16.

[0194] The embodiment is a shift strategy optimization method based on power domain assembly cooperative control. Based on comprehensive consideration of engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode and accessory power consumption, the vehicle fuel consumption performance is improved, and the fuel saving of 2% is realized in general road working condition. The steps S1 to S16 include:

[0195] S1, start.

[0196] S2, control target boundary determination: based on the control target, the boundary condition is determined, such as double-parameter shift control based on vehicle speed and throttle opening, which needs to be converted into a two-dimensional distribution matrix with vehicle speed and engine torque as boundaries.

[0197] S3, control boundary confirmation of each gear: according to the assembly speed ratio relationship, the two-dimensional matrix conversion of vehicle speed-speed and torque of each gear is completed.

[0198] S4, calculation of transmission and drive axle speed of each gear:

[0199] Gearbox_spd=v*60*gear_ratio*axle_ratio / (2*3.14*3.6*wheel_ratio);

[0200] Axle_spd=gearbox_spd / gear_ratio / axle_ratio;

[0201] Wherein,

[0202] Gearbox_spd is the transmission speed;

[0203] V is the vehicle speed of the control boundary;

[0204] gear_ratio is the current gear transmission ratio;

[0205] axle_ratio is the drive axle ratio;

[0206] wheel_ratio is the wheel radius;

[0207] Axle_spd is the drive axle speed.

[0208] S5, drive axle efficiency interpolation of each gear:

[0209] The triangular subdivision algorithm is used to interpolate the efficiency and universal characteristic data;

[0210] (1) According to the discrete coordinates, the convex hull of the discrete points is obtained by referring to the convex hull algorithm;

[0211] (2) Construct a Delaunary triangular net;

[0212] (3) According to the grid method, the coordinates of the grid points are obtained: according to the control range of the discrete points, and then the grid processing is carried out according to the node number of the longitudinal and transverse coordinates;

[0213] (4) Traverse all the grid points in the interpolation area, and use the cubic equation to interpolate the value on the undetermined point coordinate according to the three points in the triangle where the interpolation point is located, so that the interpolation point is in the Delaunary triangle;

[0214] (5) According to the three points not on the same straight line, a plane is fitted, and then the value of the point on the plane at any coordinate can be obtained.

[0215] S6, each gear driving axle input torque calculation:

[0216] Based on the torque boundary and the driving axle efficiency, the driving axle input torque is calculated.

[0217] S7, each gear transmission efficiency interpolation:

[0218] Based on the driving axle input torque, the transmission output torque is calculated, and the transmission efficiency interpolation calculation is carried out combined with the transmission speed.

[0219] S8, each gear transmission input torque calculation:

[0220] From the gear transmission efficiency interpolation result and the transmission output torque, the transmission input torque is calculated.

[0221] S9, accessory, air conditioning power consumption calculation:

[0222] According to the engine speed and the engine power, the consumption torque of each engine accessory and air conditioner is solved.

[0223] S10, each gear engine output torque calculation:

[0224] From the transmission input torque, considering the accessory and air conditioning consumption torque conversion, the engine output torque result is generated.

[0225] S11, engine thermal management mode confirmation:

[0226] Based on the input engine thermal management mode state, different engine universal characteristics are determined.

[0227] S12, engine fuel consumption calculation:

[0228] From the universal characteristics corresponding to different engine thermal management modes, based on the solved engine speed and engine output torque, the engine fuel consumption is calculated by interpolation.

[0229] S13, each gear system oil consumption loss calculation:

[0230] System_loss = eng_fuel * power_loss / 1000;

[0231] power_loss = eng_power - axle_out_power;

[0232] eng_power = eng_spd * eng_torq / 9549;

[0233] axle_out_power = axle_spd * axle_out_torq / 9549;

[0234] wherein,

[0235] System_loss is the system oil consumption loss of each gear;

[0236] eng_fuel is the engine oil consumption;

[0237] power_loss is the system power loss of each gear;

[0238] eng_power is the engine output power of each gear;

[0239] axle_out_power is the drive axle output power of each gear;

[0240] eng_spd is the engine speed corresponding to each gear and vehicle speed;

[0241] eng_torq is the engine torque corresponding to each gear and torque;

[0242] axle_out_torq is the drive axle output torque corresponding to each gear and torque;

[0243] S14, each gear system loss interface solution:

[0244] Each adjacent gear system loss is plotted, and the system loss interface line is solved, which is the target curve of control, as shown in Figure 4 、 Figure 5 .

[0245] Figure 4 is a three-dimensional schematic diagram of the adjacent gear system loss interface calculation result of the embodiment.

[0246] Figure 5 is a two-dimensional schematic diagram of the adjacent gear system loss interface calculation result of the embodiment.

[0247] wherein, Figure 4 、 Figure 5 the adjacent gears are gear 11 and gear 12, which are taken as an example of adjacent gears.Figure 4 、 Figure 5 In the figure, the light color is the system loss distribution of the 11th gear with the change of vehicle speed and engine torque, and the dark color is the system loss distribution of the 12th gear with the change of vehicle speed and engine torque. Figure 4 、 Figure 5 It can be seen that by gear switching, the part with the minimum system loss is applied as the selection of the control strategy during driving.

[0248] S15, shift curve calculation:

[0249] Based on the system loss intersection line solved in S14, the upshift and downshift lines are converted according to the speed ratio gears, and the vehicle control output is performed.

[0250] S16, end.

[0251] Figure 6 is a kind of electronic equipment structure block diagram provided by the AMT shift control method of one or more embodiments of the present application.

[0252] As Figure 6 Indicated, the present application provides an electronic device, comprising: processor, communication interface, memory and communication bus, wherein, processor, communication interface, memory are communicated with each other by communication bus;

[0253] Computer program is stored in memory, when computer program is executed by processor, make processor execute the steps of a kind of AMT shift control method.

[0254] The present application also provides a computer readable storage medium, which stores a computer program executable by an electronic device, when the computer program runs on the electronic device, so that the electronic device executes the steps of a kind of AMT shift control method.

[0255] The present application also provides a vehicle, comprising:

[0256] Electronic device, for realizing the steps of AMT shift control method;

[0257] Processor, processor runs program, when program runs from the data of electronic device output executes the steps of AMT shift control method;

[0258] Storage medium, for storing program, program runs for the data of electronic device output executes the steps of AMT shift control method.

[0259] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus can be divided into an address bus, a data bus, a control bus, and the like. For the convenience of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0260] The electronic device includes a hardware layer, an operating system layer running above the hardware layer, and an application layer running on the operating system. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory. The operating system can be any one or more computer operating systems that implement control of the electronic device through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. In embodiments of the present application, the electronic device can be a handheld device such as a smartphone or a tablet computer, or an electronic device such as a desktop computer or a portable computer, and is not particularly limited in embodiments of the present application.

[0261] The execution subject of the electronic device control in embodiments of the present application can be the electronic device, or a functional module capable of calling and executing a program in the electronic device. The electronic device can obtain a firmware corresponding to the storage medium, and the firmware corresponding to the storage medium is provided by a vendor. The firmware corresponding to different storage media can be the same or different, and is not limited herein. After the electronic device obtains the firmware corresponding to the storage medium, the electronic device can write the firmware corresponding to the storage medium into the storage medium, specifically, burn the firmware corresponding to the storage medium into the storage medium. The process of burning the firmware into the storage medium can be implemented by using existing technology, and is not described in detail in embodiments of the present application.

[0262] The electronic device can also obtain a reset command corresponding to the storage medium, and the reset command corresponding to the storage medium is provided by a vendor. The reset command corresponding to different storage media can be the same or different, and is not limited herein.

[0263] At this time, the storage medium of the electronic device is a storage medium into which the corresponding firmware is written, and the electronic device can respond to the reset command corresponding to the storage medium in the storage medium into which the corresponding firmware is written, so that the electronic device resets the storage medium into which the corresponding firmware is written according to the reset command corresponding to the storage medium. The process of resetting the storage medium according to the reset command can be implemented by using existing technology, and is not described in detail in embodiments of the present application.

[0264] For the convenience of description, the above apparatus is described in various units, modules, and the like in terms of functions. Of course, the functions of the units and modules can be implemented in one or more software and / or hardware in implementing the present application.

[0265] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless specifically so defined.

[0266] For the convenience of description, the above apparatus is described in various units, modules, and the like in terms of functions. Of course, the functions of the units and modules can be implemented in one or more software and / or hardware in implementing the present application.

[0267] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product can be stored in a storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, and the like, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments of the present application.

[0268] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An AMT shift control method, characterized in that: The AMT shift control method includes: Obtain information about the vehicle's working status; The vehicle operating status information includes information on engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption; Based on information on engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption, the powertrain assembly is coordinated and controlled to reduce fuel consumption. Among them, the shift strategy is generated based on different engine thermal management modes, and the vehicle is dynamically controlled; Among them, the power consumption of accessories includes the power consumption of air conditioners and engine accessories; The vehicle dynamic control includes superimposing the vehicle dynamic control under the power consumption state of the air conditioner and engine accessories; The powertrain coordinated control based on information on engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption includes: starting AMT shift control; determining control target boundaries; confirming control boundaries for each gear; calculating transmission and drive axle speeds for each gear; interpolating drive axle efficiency for each gear; calculating drive axle input torque for each gear; interpolating transmission efficiency for each gear; calculating transmission input torque for each gear; calculating accessory and air conditioning power consumption; calculating engine output torque for each gear; confirming an engine thermal management mode; calculating engine fuel consumption; calculating fuel consumption losses for each gear system; solving system loss handover for each gear system; calculating a shift curve; and ending AMT shift control. The method includes: in the step of determining the control target boundary, setting the control target according to the information of the current vehicle working state; Based on the control objectives, complete the confirmation of boundary conditions; The method includes: in the step of confirming the control boundary of each gear position, obtaining the assembly speed ratio relationship according to the information of the current vehicle working state; According to the assembly speed ratio relationship, complete the two-dimensional matrix conversion of vehicle speed, rotation speed and torque in each gear; The method includes: in the step of calculating the transmission speed and the drive axle speed of each gear, obtaining the transmission speed information and the drive axle speed information based on the formula; The method includes: in the step of interpolating the efficiency of the drive axle in each gear, using a triangulation algorithm to perform interpolation calculation on the efficiency and universal characteristic data.

2. The AMT shift control method according to claim 1, characterized in that: include: In the step of calculating the transmission and drive axle speeds at each gear, the transmission speed information and the drive axle speed information are obtained based on the formula; The formula includes: Gearbox_spd=v*60*gear_ratio*axle_ratio / (2*3.14*3.6*wheel_ratio); Axle_spd=gearbox_spd / gear_ratio / axle_ratio; in, Gearbox_spd is the transmission speed; V is the vehicle speed at the control boundary; gear_ratio is the current gear transmission ratio; axle_ratio is the drive axle speed ratio; wheel_ratio is the wheel rotation radius; Axle_spd is the drive axle speed.

3. The AMT shift control method according to claim 1, characterized in that: include: In the step of calculating the drive axle input torque at each gear, the drive axle input torque is calculated based on the torque limit and the drive axle efficiency.

4. The AMT shift control method according to claim 1, characterized in that: include: In the step of interpolating the transmission efficiency of each gear, the transmission output torque is calculated based on the drive axle input torque, and the transmission efficiency is interpolated and calculated in combination with the transmission speed.

5. The AMT shift control method according to claim 1, characterized in that: include: In the step of calculating the transmission input torque at each gear, the transmission input torque is calculated based on the transmission efficiency interpolation results at each gear and the transmission output torque.

6. The AMT shift control method according to claim 1, characterized in that: include: In the step of calculating the power consumption of accessories and air conditioners, the torque consumed by each engine accessory and air conditioner is calculated based on the engine speed and engine power.

7. The AMT shift control method according to claim 1, characterized in that: include: In the step of calculating the engine output torque for each gear, the transmission input torque is converted into the torque consumed by accessories and air conditioning to generate the engine output torque result.

8. The AMT shift control method according to claim 1, characterized in that: include: In the engine thermal management mode confirmation step, different engine universal characteristics are determined based on the input engine thermal management mode state.

9. The AMT shift control method according to claim 1, characterized in that: include: In the engine fuel consumption calculation step, the engine fuel consumption is calculated by interpolation based on the solved engine speed and engine output torque using the universal characteristics corresponding to different engine thermal management modes.

10. The AMT shift control method according to claim 1, characterized in that: include: In the step of calculating the fuel consumption loss of each gear system, information on the fuel consumption loss of each gear system, the power loss of each gear system, the engine output power of each gear, and the drive axle output power of each gear are obtained based on a formula; The formula includes: System_loss=eng_fuel*power_loss / 1000; power_loss=eng_power-axle_out_power; eng_power =eng_spd*eng_torq / 9549; axle_out_power=axle_spd*axle_out_torq / 9549; in, System_loss is the fuel consumption loss of each gear system; eng_fuel is the engine fuel consumption; power_loss is the system power loss at each gear; eng_power is the engine output power at each gear; axle_out_power is the output power of the drive axle in each gear; eng_spd is the engine speed corresponding to each gear and vehicle speed; eng_torq is the engine torque corresponding to each gear and torque; axle_out_torq is the output torque of the drive axle corresponding to each gear and torque.

11. The AMT shift control method according to claim 1, characterized in that: include: In the step of solving the handover of system losses in each gear, a graph is drawn according to the system losses of each adjacent gear, and the system loss handover line is solved, which is the target curve of control.

12. The AMT shift control method according to claim 1, characterized in that: include: In the step of calculating the gear shift curve, the system loss handover line is solved based on the step of solving the system loss handover of each gear; According to each speed ratio and gear position, the upshift and downshift lines are converted to control the output of the entire vehicle.

13. An AMT shift control device, characterized in that: The AMT shift control device includes: Status information module, used to obtain information about the vehicle's working status; The vehicle operating status information includes information on engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption; A collaborative control module is used to coordinate powertrain control based on information on engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption to reduce fuel consumption. Dynamic control module, used to generate shift strategies based on different engine thermal management modes and vehicle dynamic control; Among them, the power consumption of accessories includes the power consumption of air conditioners and engine accessories; The vehicle dynamic control includes superimposing the vehicle dynamic control under the power consumption state of the air conditioner and engine accessories; The powertrain coordinated control based on information on engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption includes: starting AMT shift control; determining control target boundaries; confirming control boundaries for each gear; calculating transmission and drive axle speeds for each gear; interpolating drive axle efficiency for each gear; calculating drive axle input torque for each gear; interpolating transmission efficiency for each gear; calculating transmission input torque for each gear; calculating accessory and air conditioning power consumption; calculating engine output torque for each gear; confirming an engine thermal management mode; calculating engine fuel consumption; calculating fuel consumption losses for each gear system; solving system loss handover for each gear system; calculating a shift curve; and ending AMT shift control. Among them, include: In the step of determining the control target boundary, the control target is set based on the information of the current vehicle working state; Based on the control objectives, complete the confirmation of boundary conditions; Among them, include: In the step of confirming the control boundary of each gear, the assembly speed ratio relationship is obtained based on the information of the current vehicle working state; According to the assembly speed ratio relationship, complete the two-dimensional matrix conversion of vehicle speed, rotation speed and torque in each gear; Among them, include: In the step of calculating the transmission and drive axle speeds at each gear, the transmission speed information and the drive axle speed information are obtained based on the formula; Among them, include: In the step of interpolating the efficiency of the drive axle in each gear, a triangulation algorithm is used to interpolate the efficiency and universal characteristic data.

14. An electronic device, characterized in that: include: A processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus; A computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the AMT shift control method according to any one of claims 1 to 12.

15. A computer-readable storage medium, characterized in that include: It stores a computer program that can be executed by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of the AMT shift control method according to any one of claims 1 to 12.

16. A vehicle, characterized in that: include: An electronic device for implementing the steps of the AMT shift control method according to any one of claims 1 to 12; a processor, the processor running a program, and executing the steps of the AMT shift control method according to any one of claims 1 to 12 based on data output from the electronic device when the program is running; A storage medium for storing a program, wherein when the program is run, the program executes the steps of the AMT shift control method according to any one of claims 1 to 12 for data output from an electronic device.

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