AMT gear shifting control method

Abstract

The invention discloses an AMT gear-shifting control method, and relates to the field of gear-shifting control. The AMT gear-shifting control method comprises the steps that information of the working state of a vehicle is obtained; the information of the vehicle working state comprises information of engine oil consumption, transmission efficiency, drive axle efficiency, an engine thermal management mode and accessory power consumption; according to information of engine oil consumption, transmission efficiency, drive axle efficiency and accessory power consumption, a power domain assembly performs cooperative control, and oil consumption is reduced; wherein a gear shifting strategy is generated based on different engine thermal management modes, and the whole vehicle is dynamically controlled; wherein the accessory consumption power comprises power consumption of air conditioner and engine accessories; and the whole vehicle dynamic control comprises whole vehicle dynamic control in a state of superposing the power consumption of the air conditioner and the engine accessories.

Description

Technical Field

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

[0002] Economic performance is one of the most important performance indicators in the development of heavy-duty commercial vehicles. The fuel consumption level of heavy-duty commercial vehicles determines its user reputation and market performance to a certain extent. Electronically controlled mechanical automatic transmission (AMT) is widely used in the field of heavy-duty commercial vehicles due to its high transmission efficiency, low cost, and high cost performance. Shift strategy is one of the key technologies of AMT, and the quality of the shift strategy will directly affect the performance of the vehicle. All major vehicle and transmission manufacturers are actively carrying out research on the optimization of shift strategies.

[0003] Patent document 1 (Method and device for determining automatic transmission shifting strategy - CN201811615297.7) discloses a method for formulating an automatic transmission shifting strategy, which determines the engine torque through the engine speed and throttle opening of the selected shift point, and the correspondence between the predetermined engine speed, engine torque and throttle opening. The vehicle driving state is transferred to the engine universal characteristics for gear decision making, so that the engine can work in an area with low fuel consumption rate as much as possible, thereby improving fuel economy. However, this method only improves the economy of engine performance parameters, and does not consider the influence of other powertrain parameters;

[0004] Patent document 2 (A control method and device for AMT shift strategy - CN201711346062.8) discloses a method of 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 requirements of the driver. However, this method will occupy a large amount of TCU resources during actual implementation, and it is foreseeable that the effect of improving power performance will be limited;

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

[0006] In summary, the current method for formulating AMT shift strategies for heavy-duty commercial vehicles is relatively simple, and only considers the impact of shift strategies on engine performance, without considering the coordinated control of the entire powertrain; therefore, an AMT shift control solution is needed to reduce the limitations on TCU computing power and complex algorithms such as neural networks and fuzzy control, and fully tap the fuel-saving potential of the entire vehicle during the design stage. Summary of the invention

[0007] The object of the present invention is 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 above-mentioned problem of the influence of the entire powertrain on fuel consumption and solve a technical problem of the influence of accessory power consumption on the entire powertrain control.

[0008] The present invention provides the following scheme:

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

[0010] Obtain information about the vehicle's working status;

[0011] The vehicle operating status information includes information on engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption;

[0012] Based on information on engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption, the power domain assembly is coordinated and controlled to reduce fuel consumption;

[0013] Among them, the shift strategy is generated based on different engine thermal management modes, and the vehicle is dynamically controlled;

[0014] Among them, the accessory power consumption includes the power consumption of the air conditioner and engine accessories;

[0015] The whole vehicle dynamic control includes superimposing the whole vehicle dynamic control under the power consumption state of air conditioning and engine accessories.

[0016] Furthermore, the power domain assembly collaborative control based on the information of engine fuel consumption, transmission efficiency, drive axle efficiency and accessory power consumption includes: the step of starting AMT shift control; the step of determining the control target boundary; the step of confirming the control boundary of each gear; the step of calculating the transmission and drive axle speed of each gear; the step of interpolating the drive axle efficiency of each gear; the step of calculating the drive axle input torque of each gear; the step of interpolating the transmission efficiency of each gear; the step of calculating the transmission input torque of each gear; the step of calculating the power consumption of accessories and air conditioning; the step of calculating the engine output torque of each gear; the step of confirming the engine thermal management mode; the step of calculating the engine fuel consumption; the step of calculating the fuel consumption loss of each gear system; the step of solving the loss handover of each gear system; the step of calculating the shift curve; and the step of ending AMT shift control.

[0017] Further, including:

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

[0019] Based on the control objectives, complete the confirmation of boundary conditions.

[0020] Further, including:

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

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

[0023] Further, including:

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

[0025] The formula includes:

[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] in,

[0029] Gearbox_spd is the transmission speed;

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

[0031] gear_ratio is the current gear transmission ratio;

[0032] axle_ratio is the drive axle speed ratio;

[0033] wheel_ratio is the wheel rotation radius;

[0034] Axle_spd is the drive axle speed.

[0035] Further, including:

[0036] In the step of interpolating the efficiency of the drive axle at each gear, a triangulation algorithm is used to interpolate the efficiency and universal characteristic data;

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

[0038] Construct Delaunary triangulation;

[0039] According to the gridding method, the coordinates of the grid points are obtained, including the control range of the discrete points and then the number of nodes of the vertical and horizontal coordinates are gridded;

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

[0041] Fit a plane based on three points that are not on the same straight line and find the value of any point on the plane.

[0042] Further, including:

[0043] 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.

[0044] Further, including:

[0045] 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 interpolation calculation is performed in combination with the transmission speed.

[0046] Further, including:

[0047] 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.

[0048] Further, including:

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

[0050] Further, including:

[0051] In the step of calculating the engine output torque of each gear, the transmission input torque is converted into the torque consumed by accessories and air conditioning to generate the engine output torque result.

[0052] Further, including:

[0053] In the engine thermal management mode confirmation step, different engine universal characteristics are determined based on the input engine thermal management mode state.

[0054] Further, including:

[0055] In the step of calculating the engine fuel consumption, the universal characteristics corresponding to different engine thermal management modes are used to interpolate the engine fuel consumption based on the solved engine speed and engine output torque.

[0056] Further, including:

[0057] 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;

[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] in,

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

[0065] eng_fuel is the engine fuel consumption;

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

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

[0068] axle_out_power is the output power of the drive axle in 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 output torque of the drive axle corresponding to each gear and torque.

[0072] Further, including:

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

[0074] Further, including:

[0075] In the step of calculating the gear shift curve, a system loss handover line is solved based on the step of solving the system loss handover of each gear;

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

[0077] According to two aspects of the present invention, an AMT shift control device is provided, the AMT shift control device comprising:

[0078] A status information module is used to obtain information about the working status of the vehicle;

[0079] The vehicle operating status information includes information on engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption;

[0080] The collaborative control module is used to coordinate the powertrain assembly to reduce fuel consumption based on information on engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption;

[0081] Dynamic control module, used to generate shift strategies based on different engine thermal management modes and vehicle dynamic control;

[0082] Among them, the accessory power consumption includes the power consumption of the air conditioner and engine accessories;

[0083] The whole vehicle dynamic control includes superimposing the whole vehicle dynamic control under the power consumption state of air conditioning and engine accessories.

[0084] According to three aspects of the present invention, there is provided an electronic device, comprising: 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;

[0085] 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.

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

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

[0088] An electronic device for implementing the steps of the AMT shift control method;

[0089] a processor, the processor running a program, and executing the steps of the AMT shift control method from data output from the electronic device when the program is running;

[0090] The storage medium is used to store a program, and when the program is running, the steps of the AMT shift control method are executed for the data output from the electronic device.

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

[0092] This application achieves optimal energy consumption through a power domain assembly collaborative control method that comprehensively considers engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption.

[0093] This application achieves dynamic control of the entire vehicle by generating different shifting strategies based on different engine thermal management modes.

[0094] This application refines the energy consumption control by taking into account the influence of air conditioning and engine accessories, making the dynamic control of the whole vehicle closer to the actual application scenarios of the vehicle.

[0095] This application completes the optimized design of the shifting rules for the comprehensive economic performance of the whole vehicle by designing the shifting rules in the design stage, which is used to guide the efficient and accurate development of products and reduce the complexity of later vehicle modifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0096] Figure 1 It is a flow chart of an AMT shift control method provided by one or more embodiments of the present invention.

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

[0098] Figure 3 It is a schematic diagram of the optimization process of the AMT shift schedule optimization design method for commercial vehicles according to a specific embodiment of the present invention.

[0099] Figure 4 It is a three-dimensional schematic diagram of the calculation results of the loss boundary of adjacent gear systems according to a specific embodiment of the present invention.

[0100] Figure 5 It is a two-dimensional schematic diagram of the calculation results of the loss boundary of adjacent gear systems according to a specific embodiment of the present invention.

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

[0102] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0104] like Figure 1 The AMT shift control method shown includes:

[0105] Step A1, obtaining information on the working status of the vehicle;

[0106] The information on the vehicle's operating status includes information on engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption;

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

[0108] Step A3, generating a shift strategy based on different engine thermal management modes and dynamic control of the entire vehicle;

[0109] Among them, the accessory power consumption includes the power consumption of the air conditioner and engine accessories;

[0110] The whole vehicle dynamic control includes the whole vehicle dynamic control under the power consumption state of superimposed air conditioning and engine accessories.

[0111] Specifically, by building a vehicle model, calculating the energy loss of the system under different gear conditions, and comprehensively considering the engine fuel consumption, transmission, drive axle efficiency, engine thermal management mode, and accessory power consumption, the coordinated control of the full power domain assembly conditions is achieved. After optimizing the shift strategy, fuel saving can be achieved for heavy-duty commercial vehicles under general highway 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 step of starting AMT shift control; the step of determining the control target boundary; the step of confirming the control boundary of each gear; the step of calculating the transmission and drive axle speed of each gear; the step of interpolating the drive axle efficiency of each gear; the step of calculating the drive axle input torque of each gear; the step of interpolating the transmission efficiency of each gear; the step of calculating the transmission input torque of each gear; the step of calculating the power consumption of accessories and air conditioning; the step of calculating the engine output torque of each gear; the step of confirming the engine thermal management mode; the step of calculating the engine fuel consumption; the step of calculating the fuel consumption loss of each gear system; the step of solving the loss handover of each gear system; the step of calculating the shift curve; and the step of ending AMT shift control.

[0113] Specifically, based on the control target, the boundary conditions are confirmed. For example, if dual-parameter shift control is performed based on vehicle speed and throttle opening, it needs to be converted into a two-dimensional distribution matrix with vehicle speed and engine torque as the boundaries. According to the confirmation of torque as the boundary, according to the speed ratio relationship of the assembly, the two-dimensional matrix conversion of vehicle speed-speed and torque of each gear is completed to generate a three-dimensional diagram. When the torque is input by the transmission, the consumption of accessories and air conditioners is converted into torque, and this part of the torque consumption is removed to generate the engine output torque result. Based on the input engine thermal management mode state, different engine universal characteristics are determined. The universal characteristic curve is essentially a synthesis of all load characteristics and speed characteristic curves. It can represent the change relationship of the main parameters of the engine in the entire working range, and it can be used to determine the most economical working area of ​​the engine, and of course, it can also determine the minimum value area of ​​a certain emission pollutant. In the process of engine parameter matching, these optimal performance areas are made to fall within the most commonly used working conditions through parameter matching. Further, based on the solved engine speed and engine output torque, the engine fuel consumption is interpolated and calculated by the universal characteristics corresponding to different engine thermal management modes. Draw a graph based on the system loss of each adjacent gear and solve the system loss handover line, which is the target curve for control. Based on the system loss handover line, the upshift and downshift lines are converted according to each speed ratio and gear, and the whole vehicle control output is performed to ensure that the vehicle runs in the most fuel-efficient state.

[0114] The steps of starting the AMT shift control and ending the AMT shift control can be used for an interface embedded in a large system. For example, in a system of a complete vehicle control method, a system of an AMT shift control method is embedded, and when the system of the complete vehicle control method runs to the step of the AMT shift control method, an instruction to start the AMT shift control is output, and at the same time, the step of starting the AMT shift control is started, and according to the instruction to start the AMT shift control, necessary operation data is obtained and the process of the AMT shift control method is advanced until the step of ending the AMT shift control is reached, and information on the completion of the process 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 this embodiment, it includes:

[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 objectives, complete the confirmation of boundary conditions.

[0118] In this embodiment, it includes:

[0119] In the step of confirming the control boundary of each gear position, the overall speed ratio relationship is obtained according to the information of the current vehicle working state;

[0120] According to the relationship between the assembly speed ratios, the two-dimensional matrix conversion of vehicle speed, rotation speed and torque of each gear is completed.

[0121] In this embodiment, it includes:

[0122] In the step of calculating the transmission and drive axle speeds in each gear, the transmission speed information and the drive axle speed information are obtained 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] in,

[0127] Gearbox_spd is the transmission speed;

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

[0129] gear_ratio is the current gear transmission ratio;

[0130] axle_ratio is the drive axle speed ratio;

[0131] wheel_ratio is the wheel rotation radius;

[0132] Axle_spd is the drive axle speed.

[0133] In this embodiment, it includes:

[0134] In the step of interpolating the efficiency of the drive axle at each gear, a triangulation algorithm is used to interpolate the efficiency and universal characteristic data;

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

[0136] Construct Delaunary triangulation;

[0137] According to the gridding method, the coordinates of the grid points are obtained, including the control range of the discrete points and then the number of nodes of the vertical and horizontal coordinates are gridded;

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

[0139] Fit a plane based on three points that are not on the same straight line and find the value of any point on the plane.

[0140] In this embodiment, it includes:

[0141] 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.

[0142] In this embodiment, it includes:

[0143] 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 interpolation calculation is performed in combination with the transmission speed.

[0144] In this embodiment, it includes:

[0145] 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.

[0146] In this embodiment, it includes:

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

[0148] In this embodiment, it includes:

[0149] In the step of calculating the engine output torque of each gear, the transmission input torque is converted into the torque consumed by accessories and air conditioning to generate the engine output torque result.

[0150] In this embodiment, it includes:

[0151] In the engine thermal management mode confirmation step, different engine universal characteristics are determined based on the input engine thermal management mode state.

[0152] In this embodiment, it includes:

[0153] In the step of calculating the engine fuel consumption, the universal characteristics corresponding to different engine thermal management modes are used to interpolate the engine fuel consumption based on the solved engine speed and engine output torque.

[0154] In this embodiment, it includes:

[0155] 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;

[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] in,

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

[0163] eng_fuel is the engine fuel consumption;

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

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

[0166] axle_out_power is the output power of the drive axle in 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 output torque of the drive axle corresponding to each gear and torque.

[0170] In this embodiment, it includes:

[0171] 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.

[0172] In this embodiment, it includes:

[0173] In the step of calculating the gear shift curve, a system loss handover line is solved based on the step of solving the system loss handover of each gear;

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

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

[0176] like Figure 2 The AMT shift control device shown includes: a state information module, a cooperative control module, and a dynamic control module;

[0177] A status information module is used to obtain information about the working status of the vehicle;

[0178] The information on the vehicle's operating status includes information on engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption;

[0179] The collaborative control module is used to coordinate the powertrain assembly to reduce fuel consumption based on information on engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption;

[0180] Dynamic control module, used to generate shift strategies based on different engine thermal management modes and vehicle dynamic control;

[0181] Among them, the accessory power consumption includes the power consumption of the air conditioner and engine accessories;

[0182] The whole vehicle dynamic control includes the whole vehicle dynamic control under the power consumption state of superimposed air conditioning and engine accessories.

[0183] It is worth noting that although the system only discloses the status information module, the collaborative control module, and the dynamic control module, it does not mean that the device is limited to the above-mentioned basic functional modules. Rather, what the present invention wants to express is that, based on the above-mentioned basic functional modules, those skilled in the art can arbitrarily add one or more functional modules in combination with the prior art to form an infinite number of embodiments or technical solutions. In other words, the system is open rather than closed. Just because the present embodiment only discloses individual basic functional modules, it cannot be considered that the scope of protection of the claims of the present invention is limited to the above-mentioned basic functional modules.

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

[0185] This application achieves optimal energy consumption through a power domain assembly collaborative control method that comprehensively considers engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power consumption.

[0186] This application achieves dynamic control of the entire vehicle by generating different shifting strategies based on different engine thermal management modes.

[0187] This application refines the energy consumption control by taking into account the influence of air conditioning and engine accessories, making the dynamic control of the whole vehicle closer to the actual application scenarios of the vehicle.

[0188] This application completes the optimized design of the shifting rules for the comprehensive economic performance of the whole vehicle by designing the shifting rules in the design stage, which is used to guide the efficient and accurate development of products and reduce the complexity of later vehicle modifications.

[0189] Figure 3 It is a schematic diagram of the optimization process of the AMT shift schedule optimization design method for commercial vehicles according to a specific embodiment of the present invention.

[0190] Figure 4 It is a three-dimensional schematic diagram of the calculation results of the loss boundary of adjacent gear systems according to a specific embodiment of the present invention.

[0191] Figure 5 It is a two-dimensional schematic diagram of the calculation results of the loss boundary of adjacent gear systems according to a specific embodiment of the present invention.

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

[0193] In a specific embodiment, if Figure 3 The optimization process of the commercial vehicle AMT shift schedule optimization design method shown includes: steps S1 to S16.

[0194] This embodiment is a shift strategy optimization method based on powertrain assembly coordinated control, which improves vehicle fuel consumption performance and achieves 2% fuel saving in general highway conditions by comprehensively considering engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption. Steps S1 to S16 include:

[0195] S1. Start.

[0196] S2. Determine the boundary of the control target: Based on the control target, complete the boundary condition determination. For example, if dual-parameter shift control is performed based on vehicle speed and throttle opening, it needs to be converted into a two-dimensional distribution matrix with vehicle speed and engine torque as boundaries.

[0197] S3. Confirmation of the control boundary of each gear: According to the relationship of the assembly speed ratio, complete the two-dimensional matrix conversion of vehicle speed, rotation speed and torque of each gear.

[0198] S4, calculation of transmission and drive axle speed in 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] in,

[0202] Gearbox_spd is the transmission speed;

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

[0204] gear_ratio is the current gear transmission ratio;

[0205] axle_ratio is the drive axle speed ratio;

[0206] wheel_ratio is the wheel rotation radius;

[0207] Axle_spd is the drive axle speed.

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

[0209] The efficiency and universal characteristic data are interpolated using triangulation algorithm;

[0210] (1) According to the discrete coordinates, refer to the convex hull algorithm to obtain the convex hull of the discrete points;

[0211] (2) Construct Delaunary triangulation;

[0212] (3) According to the gridding method, the coordinates of the grid points are obtained: according to the control range of the discrete points, the number of nodes of the vertical and horizontal coordinates are gridded;

[0213] (4) Traverse all grid points in the interpolation area, and use the cubic equation to interpolate the coordinates of the point to be determined based on the three points in the triangle where the interpolation point is located, so that the point to be interpolated is within the Delaunary triangle;

[0214] (5) A plane is fitted based on three points that are not on the same straight line, and then the value of any point on the coordinates in the plane can be calculated.

[0215] S6. Calculation of input torque of drive axle in each gear:

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

[0217] S7, interpolation of transmission efficiency at each gear:

[0218] The transmission output torque is calculated based on the drive axle input torque, and the transmission efficiency is interpolated based on the transmission speed.

[0219] S8. Calculation of transmission input torque at each gear:

[0220] The transmission input torque is calculated based on the transmission efficiency interpolation results of each gear and the transmission output torque.

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

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

[0223] S10. Calculation of engine output torque at each gear:

[0224] The engine output torque is generated by the transmission input torque, taking into account the torque conversion consumed by accessories and air conditioning.

[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. Calculation of engine fuel consumption:

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

[0229] S13. Calculation of fuel consumption loss of each gear system:

[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] in,

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

[0236] eng_fuel is the engine fuel consumption;

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

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

[0239] axle_out_power is the output power of the drive axle in 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 output torque of the drive axle corresponding to each gear and torque;

[0243] S14, loss transfer solution for each gear system:

[0244] Draw a graph of the system loss for each adjacent gear, and solve the intersection line of the system loss, which is the target curve of the control, such as Figure 4 , Figure 5 shown.

[0245] Figure 4 It is a three-dimensional schematic diagram of the calculation results of the loss boundary of adjacent gear systems in this embodiment.

[0246] Figure 5 It is a two-dimensional schematic diagram of the calculation results of the loss boundary of the adjacent gear system in this embodiment.

[0247] in, Figure 4 , Figure 5 The adjacent gears shown refer to 11th gear and 12th gear as an example of adjacent gears. Figure 4 , Figure 5 In the figure, the light color is the distribution of the system loss of the 11th gear as the vehicle speed and engine torque change, and the dark color is the distribution of the system loss of the 12th gear as the vehicle speed and engine torque change. Figure 4 , Figure 5 It can be seen that by shifting gears, the part with the smallest system loss is selected as the control strategy during driving.

[0248] S15, shift curve calculation:

[0249] Based on the system loss handover line solved by S14, the upshift and downshift lines are converted according to each speed ratio and gear position to perform vehicle control output.

[0250] S16, end.

[0251] Figure 6 It is a structural block diagram of an electronic device of an AMT shift control method provided by one or more embodiments of the present invention.

[0252] like Figure 6 As shown, the present application provides an electronic device, including: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus;

[0253] A computer program is stored in the memory. When the computer program is executed by the processor, the processor executes the steps of an 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, the electronic device executes the steps of an AMT shift control method.

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

[0256] An electronic device for implementing the steps of an AMT shift control method;

[0257] A processor, the processor runs a program, and when the program runs, the steps of the AMT shift control method are executed from the data output by the electronic device;

[0258] The storage medium is used to store a program, and when the program is running, the program executes the steps of the AMT shift control method for the data output from the electronic device.

[0259] The communication bus mentioned in the above electronic device can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease 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 on 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 electronic device control 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 addition, in an embodiment of the present invention, the electronic device can be a handheld device such as a smart phone or a tablet computer, or can be an electronic device such as a desktop computer or a portable computer, which is not particularly limited in the embodiment of the present invention.

[0261] The execution subject of the electronic device control in the embodiment of the present invention may be an electronic device, or a functional module in the electronic device that can call and execute a program. The electronic device may obtain the firmware corresponding to the storage medium. The firmware corresponding to the storage medium is provided by the supplier. The firmware corresponding to different storage media may be the same or different, which is not limited here. After the electronic device obtains the firmware corresponding to the storage medium, the firmware corresponding to the storage medium may be written into the storage medium, specifically, the firmware corresponding to the storage medium may be burned into the storage medium. The process of burning the firmware into the storage medium may be implemented using existing technology, which will not be described in detail in the embodiment of the present invention.

[0262] The electronic device may also obtain a reset command corresponding to the storage medium. The reset command corresponding to the storage medium is provided by the supplier. The reset commands corresponding to different storage media may be the same or different, and are not limited here.

[0263] At this time, the storage medium of the electronic device is a storage medium in 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 in which the corresponding firmware is written, so that the electronic device resets the storage medium in 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 the existing technology and will not be described in detail in the embodiments of the present invention.

[0264] For the convenience of description, the above devices are described in terms of functions and are divided into various units and modules. Of course, when implementing the present application, the functions of each unit and module can be implemented in the same or multiple software and / or hardware.

[0265] Those skilled in the art will appreciate that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined.

[0266] For the method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0267] It can be known from the description of the above implementation modes that 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 solution of the present application can be essentially or partly contributed to the prior art in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server or a network device, etc.) to execute the methods described in the various implementation modes of the present application or certain parts of the implementation modes.

[0268] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An AMT shift control method, characterized in that: The AMT shift control method comprises: 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 power domain 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 whole vehicle dynamic control includes superimposing the whole vehicle dynamic control under the power consumption state of the air conditioner and the engine accessories.

2. The AMT shift control method according to claim 1, characterized in that: The power domain assembly collaborative control based on the information of engine fuel consumption, transmission efficiency, drive axle efficiency and accessory power consumption includes: the step of starting AMT shift control; the step of determining the control target boundary; the step of confirming the control boundary of each gear; the step of calculating the transmission and drive axle speed of each gear; the step of interpolating the drive axle efficiency of each gear; the step of calculating the drive axle input torque of each gear; the step of interpolating the transmission efficiency of each gear; the step of calculating the transmission input torque of each gear; the step of calculating the power consumption of accessories and air conditioning; the step of calculating the engine output torque of each gear; the step of confirming the engine thermal management mode; the step of calculating the engine fuel consumption; the step of calculating the fuel consumption loss of each gear system; the step of solving the loss handover of each gear system; the step of calculating the shift curve; and the step of ending AMT shift control.

3. The AMT shift control method according to claim 2, characterized in that: include: In the step of determining the control target boundary, the control target is set according to the information of the current vehicle working state; Based on the control objectives, complete the confirmation of boundary conditions.

4. The AMT shift control method according to claim 3, characterized in that: include: In the step of confirming the control boundary of each gear position, the overall speed ratio relationship is obtained according to the information of the current vehicle working state; According to the relationship between the assembly speed ratios, the two-dimensional matrix conversion of vehicle speed, rotation speed and torque of each gear is completed.

5. The AMT shift control method according to claim 4, characterized in that: include: In the step of calculating the transmission and drive axle speeds at each gear, transmission speed information and drive axle speed information are obtained based on a calculation formula.

6. The AMT shift control method according to claim 5, characterized in that: 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.

7. An AMT shift control device, characterized in that: The AMT shift control device comprises: A status information module is used to obtain information about the working status of the vehicle; The vehicle operating status information includes information on engine fuel consumption, transmission efficiency, drive axle efficiency, engine thermal management mode, and accessory power consumption; The collaborative control module is used to coordinate the powertrain assembly to reduce fuel consumption based on information on engine fuel consumption, transmission efficiency, drive axle efficiency, and accessory power 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 whole vehicle dynamic control includes superimposing the whole vehicle dynamic control under the power consumption state of air conditioning and engine accessories.

8. 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 6.

9. 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 6.

10. 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 6; A processor, the processor runs a program, and when the program runs, the data output from the electronic device executes the steps of the AMT shift control method according to any one of claims 1 to 6; 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 6 for data output from an electronic device.

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