A method, device, and electronic equipment for shifting gears in a vehicle.

Abstract

This invention discloses a vehicle gear shifting method, apparatus, and electronic device. The method includes: after the engine starts, determining that the vehicle is shifting in a low-temperature mode; finding a primary shifting influence factor corresponding to the current shifting influence parameter based on the correspondence between shifting influence parameters and shifting influence factors; then correcting the shifting point to be corrected based on the found primary shifting influence factor, secondary shifting influence factor, and shifting point to be corrected; and controlling the vehicle's gear shifting based on the corrected shifting point. The secondary influence factor is determined based on the vehicle's current state and / or the road on which the vehicle is traveling. Since the primary shifting influence factor is determined based on the shifting influence parameter, and the correction of the shifting point to be corrected is performed based on the primary shifting influence factor, secondary shifting influence factor, and shifting point to be corrected, compared to the prior art which uses a fixed shift line, this method reduces the shifting frequency, minimizes power interruption, and thus improves vehicle performance.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a method, apparatus and electronic device for shifting gears in a vehicle. Background Technology

[0002] Existing automated mechanical transmissions (AMTs) distinguish between a normal mode and a low-temperature mode during gear shifts based on engine coolant temperature and automatic transmission fluid temperature. In low-temperature mode, shifting is performed using the low-temperature shift line; in normal mode, the normal shift line is used. The low-temperature shifting patterns are similar for each gear, and the shifting mode distinction is coarse.

[0003] In related technologies, when using a low-temperature shift cable for shifting in low-temperature mode, the low-temperature shift cable remains fixed, resulting in a more severe power interruption phenomenon. Summary of the Invention

[0004] This invention provides a vehicle shifting method, device, and electronic device to solve the problem of severe power interruption when a vehicle uses a fixed low-temperature shift cable for shifting in low-temperature conditions, as described in the prior art.

[0005] In a first aspect, embodiments of the present invention provide a method for shifting gears in a vehicle, comprising:

[0006] After the engine starts, the vehicle is determined to use a low-temperature mode for gear shifting based on the engine's current oil temperature and / or engine's current coolant temperature.

[0007] Based on the correspondence between shift influence parameters and shift influence factors, find the main shift influence factor corresponding to the current shift influence parameter. The shift influence parameter includes the current oil temperature and the current coolant temperature of the engine, or the shift influence parameter includes the current oil temperature of the engine and the internal resistance of the vehicle.

[0008] Based on the main shift influence factor, the auxiliary shift influence factor, and the shift point to be corrected, the shift point to be corrected is corrected to obtain the corrected shift point. The auxiliary shift influence factor is determined based on the current state of the vehicle and / or the road conditions on which the vehicle is traveling, and the shift point to be corrected is the shift point corresponding to the current opening degree of the accelerator pedal.

[0009] The vehicle is shifted according to the corrected shift point.

[0010] The above method, through the correspondence between shift influence parameters and shift influence factors, finds the primary shift influence factor corresponding to the current shift influence parameter. Based on the found primary shift influence factor, secondary shift influence factor, and shift point to be corrected, the shift point to be corrected is corrected. The vehicle shifts are controlled based on the corrected shift point. Since this application can correct the shift point under low-temperature driving conditions, compared with the prior art which uses a fixed shift line, it can optimize the shift line under low-temperature driving conditions, reduce the shift frequency, minimize power interruption, and thus improve vehicle performance.

[0011] In one possible implementation, if the shift control is the first shift controlled by the automatic transmission after the engine starts, then the step of finding the main shift influence factor corresponding to the shift influence parameter based on the correspondence between the shift influence parameter and the shift influence factor includes:

[0012] Based on the correspondence between automatic transmission oil temperature, engine coolant temperature, and shift influence factors, find the main shift influence factor corresponding to the current oil temperature and the current coolant temperature of the engine.

[0013] If the shift control described above is the first shift controlled by the automatic transmission after the engine starts, then the shift influencing parameters include the current engine oil temperature and the current engine coolant temperature. Based on the correspondence between the automatic transmission oil temperature, the engine coolant temperature, and the shift influencing factors, the main shift influencing factor is found. During the first shift, the main shift influencing factor determined by the automatic transmission oil temperature and the engine coolant temperature is used as a correction parameter for the shift point to be corrected, thereby achieving reasonable correction of the first shift point under low-temperature driving conditions.

[0014] In one possible implementation, if the shift control refers to shifts other than the initial shift controlled by the automatic transmission after engine startup, then before finding the primary shift influence factor corresponding to the current shift influence parameter based on the correspondence between shift influence parameters and shift influence factors, the method further includes:

[0015] Calculate the internal resistance of the vehicle based on its mass, acceleration, gradient resistance, rolling resistance, and air resistance.

[0016] The step of finding the main shifting influence factor corresponding to the current shifting influence parameter based on the correspondence between shifting influence parameters and shifting influence factors includes:

[0017] Based on the correspondence between automatic transmission oil temperature, internal resistance, and shift influence factors, find the main shift influence factor corresponding to the current oil temperature and internal resistance of the engine.

[0018] If the shift control described above refers to shifts other than the initial shift controlled by the automatic transmission after engine startup, then the shift influencing parameters include the current engine oil temperature and the vehicle's internal resistance. Therefore, before finding the main shift influencing factor corresponding to the current shift influencing parameters, the vehicle's internal resistance can be calculated based on the vehicle's mass, acceleration, gradient resistance, rolling resistance, and air resistance. Then, the main shift influencing factor is found based on the correspondence between the automatic transmission oil temperature measured by the vehicle's internal sensors, the calculated vehicle internal resistance, and the shift influencing factors. During vehicle operation, the main shift influencing factor determined using the automatic transmission oil temperature and the vehicle's internal resistance is used as a correction parameter for the shift point to be corrected, achieving reasonable correction of the shift point during low-temperature driving.

[0019] In one possible implementation, the shift point to be corrected includes a base shift point, a maximum shift point, and a minimum shift point;

[0020] The step of correcting the shift point to be corrected based on the main shift influence factor, the auxiliary shift influence factor, and the shift point to be corrected includes:

[0021] If the sum of the main shift influence factor and the auxiliary shift influence factor is greater than or equal to zero, then the corrected shift point is calculated based on the basic shift point, the maximum shift point, and the sum.

[0022] If the sum of the main shift influence factor and the auxiliary shift influence factor is less than zero, then the corrected shift point is calculated based on the basic shift point, the minimum shift point, and the sum.

[0023] The above method calculates the corrected shift point based on the relationship between the sum of the main shift influence factor and the auxiliary shift influence factor and zero. When the sum is greater than or equal to zero, the corrected shift point is calculated based on the basic shift point, the maximum shift point, and the sum. When the sum is less than zero, the corrected shift point is calculated based on the basic shift point, the minimum shift point, and the sum. This method can improve the accuracy of the corrected shift point.

[0024] In one possible implementation, calculating the corrected shift point based on the base shift point, the maximum shift point, and the sum includes:

[0025] Calculate the first difference between the maximum shift point and the basic shift point, multiply the first difference by the sum, and use the sum of the product and the basic shift point as the corrected shift point.

[0026] In one possible implementation, calculating the corrected shift point based on the base shift point, the minimum shift point, and the sum includes:

[0027] Calculate the second difference between the base shift point and the minimum shift point, multiply the second difference by the sum, and use the sum of the product and the minimum shift point as the corrected shift point.

[0028] The above method discloses two different ways of calculating the corrected shift point under different conditions. By using different calculation methods to calculate the corrected shift point under different conditions, the accuracy of the calculated corrected shift point can be provided.

[0029] In one possible implementation, after performing shift control on the vehicle based on the corrected shift point, the method further includes:

[0030] Based on the current oil temperature and / or the current coolant temperature of the engine, determine that the vehicle is shifting gears in normal temperature mode;

[0031] The vehicle is shifted according to the shift point corresponding to the normal temperature mode.

[0032] The above method triggers the normal shift mode when the automatic transmission oil temperature and / or engine coolant temperature are higher than the reference value. That is, the normal shift line is used to control the vehicle to shift gears, thus completing the switch from the low temperature shift mode to the normal shift mode.

[0033] In one possible implementation, the auxiliary shift influence factor includes some or all of the following:

[0034] Factors affecting road slope;

[0035] Vehicle steering influencing factors;

[0036] Factors affecting road elevation;

[0037] Factors affecting vehicle acceleration;

[0038] Vehicle weight influencing factors.

[0039] Secondly, embodiments of the present invention provide a vehicle gear shifting device, comprising:

[0040] The determination module is used to determine, after the engine starts, whether the vehicle should use a low-temperature mode for gear shifting based on the engine's current oil temperature and / or engine's current coolant temperature.

[0041] The lookup module is used to find the main shift influencing factor corresponding to the current shift influencing parameter based on the correspondence between shift influencing parameters and shift influencing factors. The shift influencing parameter includes the current oil temperature and the current coolant temperature of the engine, or the shift influencing parameter includes the current oil temperature of the engine and the internal resistance of the vehicle.

[0042] The correction module is used to correct the shift point to be corrected based on the main shift influence factor, the auxiliary shift influence factor and the shift point to be corrected, so as to obtain the corrected shift point. The auxiliary shift influence factor is determined based on the current state of the vehicle and / or the road conditions on which the vehicle is traveling, and the shift point to be corrected is the shift point corresponding to the current opening degree of the accelerator pedal.

[0043] The control module is used to control the vehicle's gear shifting based on the corrected shift points.

[0044] In one possible implementation, if the shift control is the first shift controlled by the automatic transmission after the engine starts, then the lookup module is specifically used for:

[0045] Based on the correspondence between automatic transmission oil temperature, engine coolant temperature, and shift influence factors, find the main shift influence factor corresponding to the current oil temperature and the current coolant temperature of the engine.

[0046] In one possible implementation, if the shift control refers to shifts other than the initial shift controlled by the automatic transmission after engine startup, then before searching for the primary shift influence factor corresponding to the current shift influence parameter based on the correspondence between shift influence parameters and shift influence factors, the determining module is further configured to:

[0047] Calculate the internal resistance of the vehicle based on its mass, acceleration, gradient resistance, rolling resistance, and air resistance.

[0048] The search module is specifically used for:

[0049] Based on the correspondence between automatic transmission oil temperature, internal resistance, and shift influence factors, find the main shift influence factor corresponding to the current oil temperature and internal resistance of the engine.

[0050] In one possible implementation, the shift point to be corrected includes a base shift point, a maximum shift point, and a minimum shift point;

[0051] The correction module is specifically used for:

[0052] If the sum of the main shift influence factor and the auxiliary shift influence factor is greater than or equal to zero, then the corrected shift point is calculated based on the basic shift point, the maximum shift point, and the sum.

[0053] If the sum of the main shift influence factor and the auxiliary shift influence factor is less than zero, then the corrected shift point is calculated based on the basic shift point, the minimum shift point, and the sum.

[0054] In one possible implementation, the correction module is specifically used for:

[0055] Calculate the first difference between the maximum shift point and the basic shift point, multiply the first difference by the sum, and use the sum of the product and the basic shift point as the corrected shift point.

[0056] In one possible implementation, the correction module is specifically used for:

[0057] Calculate the second difference between the base shift point and the minimum shift point, multiply the second difference by the sum, and use the sum of the product and the minimum shift point as the corrected shift point.

[0058] In one possible implementation, after performing shift control on the vehicle based on the corrected shift point, the determining module is further configured to:

[0059] Based on the current oil temperature and / or the current coolant temperature of the engine, determine that the vehicle is shifting gears in normal temperature mode;

[0060] The control module is specifically used for:

[0061] The vehicle is shifted according to the shift point corresponding to the normal temperature mode.

[0062] In one possible implementation, the auxiliary shift influence factor includes some or all of the following:

[0063] Factors affecting road slope;

[0064] Vehicle steering influencing factors;

[0065] Factors affecting road elevation;

[0066] Factors affecting vehicle acceleration;

[0067] Vehicle weight influencing factors.

[0068] Thirdly, embodiments of the present invention provide an electronic device, comprising:

[0069] processor;

[0070] The memory, which is communicatively connected to the processor, is used to store the processor's executable instructions;

[0071] The processor is configured to execute the instructions to implement the vehicle shifting method as described in any of the first aspect embodiments.

[0072] Fourthly, this application also provides a storage medium that, when the instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to perform a vehicle shifting method as described in any of the first aspects.

[0073] Furthermore, the technical effects of any implementation of the steps of the vehicle shifting method described in the first aspect when executed by the processing unit in the second to fourth aspects can be found in the technical effects of different implementations in the first aspect, and will not be repeated here.

[0074] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0075] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0076] Figure 1 A schematic flowchart illustrating a vehicle gear shifting method provided in an embodiment of this application;

[0077] Figure 2 A complete flowchart illustrating a vehicle gear shifting method provided in this application embodiment;

[0078] Figure 3 A schematic diagram of the structure of a vehicle gear shifting device provided in an embodiment of this application;

[0079] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0080] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0081] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0082] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0083] During gear shifting, AMT vehicles experience power interruption due to clutch disengagement and engagement. This is especially true at temperatures as low as -25°C. When using a fixed low-temperature shift cable, the vehicle speed decreases after upshifting due to factors such as high air density, viscous automatic transmission fluid, and increased friction in the transmission system. This frequent gear shifting exacerbates the power interruption problem.

[0084] To address the aforementioned problems, this application provides a vehicle control method applied to an automatic transmission, such as... Figure 1 As shown, the method includes the following steps:

[0085] S101. After the engine starts, determine that the vehicle will use a low-temperature mode for gear shifting based on the current oil temperature of the automatic transmission and / or the current coolant temperature of the engine.

[0086] S102. Based on the correspondence between shift influence parameters and shift influence factors, find the main shift influence factor corresponding to the current shift influence parameter, wherein the shift influence parameter includes the current oil temperature of the automatic transmission and the current coolant temperature of the engine, or the shift influence parameter includes the current oil temperature of the engine and the internal resistance of the vehicle.

[0087] S103. Based on the main shift influence factor, the auxiliary shift influence factor, and the shift point to be corrected, the shift point to be corrected is corrected to obtain the corrected shift point. The auxiliary shift influence factor is determined based on the current state of the vehicle and / or the road conditions on which the vehicle is traveling, and the shift point to be corrected is the shift point corresponding to the current opening degree of the accelerator pedal.

[0088] S104. Perform shift control on the vehicle according to the corrected shift point.

[0089] In this embodiment, after the engine starts, it is determined that the vehicle is shifting in a low-temperature mode. Then, based on the correspondence between shifting influence parameters and shifting influence factors, the primary shifting influence factor corresponding to the current shifting influence parameters is found. Next, based on the found primary shifting influence factor, secondary shifting influence factor, and the shift point to be corrected, the shift point to be corrected is adjusted to obtain the corrected shift point. Finally, the vehicle's shifting is controlled based on the corrected shift point. The secondary influence factor is determined based on the vehicle's current state and / or the road it is traveling on, and the shift point to be corrected is the shift point corresponding to the current opening degree of the accelerator pedal. Since the primary shifting influence factor is determined based on the shifting influence parameters, and the correction of the shift point to be corrected is based on the primary shifting influence factor, secondary shifting influence factor, and the shift point to be corrected, compared to the prior art which uses a fixed shift line, this reduces the shifting frequency, minimizes power interruption, and thus improves vehicle performance.

[0090] The automatic transmission in this application embodiment can be an electromechanical automatic transmission.

[0091] In specific implementation, the shifting influence parameters may include the current oil temperature of the automatic transmission and the current coolant temperature of the engine, as well as the current oil temperature of the automatic transmission and the internal resistance of the vehicle. When the shifting control is the first shift controlled by the automatic transmission after the engine starts, the shifting influence parameters include the current oil temperature of the automatic transmission and the current coolant temperature of the engine. When the shifting control is any shift other than the first shift, that is, shifting during vehicle operation, the shifting influence parameters include the current oil temperature of the automatic transmission and the internal resistance of the vehicle. The following detailed description of this application is based on specific embodiments.

[0092] like Figure 2 The diagram shown is a complete flowchart of a vehicle gear shifting method provided in an embodiment of this application, which can be applied to an automatic transmission in a vehicle. The method includes the following steps:

[0093] Step 201: Start the engine and obtain the current oil temperature of the automatic transmission and / or the current coolant temperature of the engine through the sensors.

[0094] After the engine starts, the automatic transmission control unit determines the starting gear based on the vehicle weight m and the slope s. Specifically, the vehicle weight m can be estimated based on the CAN signal. The automatic transmission control unit receives the CAN signal that represents the airbag deformation, thereby obtaining the vehicle weight m.

[0095] After the automatic transmission control unit determines the starting gear, the driver manually moves the gear shift lever, and the automatic transmission controls the gear to switch from neutral to starting gear. After the driver presses the accelerator pedal, the automatic transmission obtains the current opening and closing degree of the accelerator pedal, and the automatic transmission control unit obtains the current oil temperature of the automatic transmission and the current coolant temperature of the engine through sensors.

[0096] Step 202: Determine whether the vehicle is shifting in low-temperature shift mode based on the current oil temperature of the automatic transmission and / or the current coolant temperature of the engine. If yes, proceed to step 203; otherwise, proceed to step 210.

[0097] In a specific embodiment, when the current oil temperature of the automatic transmission and / or the current coolant temperature of the engine are less than or equal to a reference value, the vehicle adopts a low-temperature shifting mode; when the current oil temperature of the engine and / or the current coolant temperature of the engine are greater than the reference value, the vehicle adopts a normal shifting mode.

[0098] For example, with a reference value of -25℃, when the engine's current oil temperature is less than or equal to -25℃, and / or the engine's current coolant temperature is less than or equal to -25℃, the vehicle adopts a low-temperature shifting mode; otherwise, the vehicle adopts a normal shifting mode.

[0099] Step 203: Based on the correspondence between the automatic transmission oil temperature, engine coolant temperature, and shift influence factor, find the main shift influence factor TemFac that corresponds to the current automatic transmission oil temperature and the current engine coolant temperature.

[0100] In a specific embodiment, the main shift influencing factor TemFac is found based on the correspondence between the automatic transmission oil temperature TTrsm, the engine coolant temperature TEngCoolt, and the shift influencing factor.

[0101] The correspondence between the automatic transmission oil temperature TTrsm, the engine coolant temperature TEngCoolt, and the shift influencing factor can be preset and can be displayed in tabular form, as shown in Table 1.

[0102] x: TTrsm(℃)y: TEngCoolt(℃)

[0103]

[0104] Table 1

[0105] For example, if the current oil temperature TTrsm of the automatic transmission is -30℃ and the current coolant temperature TEngCoolt of the engine is -20℃, then by referring to Table 1, the main shift influence factor TemFac is found to be 0.18.

[0106] Step 204: Based on the main shift influence factor, the auxiliary shift influence factor, and the shift point to be corrected, the shift point to be corrected is corrected to obtain the corrected shift point.

[0107] In a specific embodiment, the auxiliary shifting influence factor may include some or all of the following: road slope influence factor GrdtFac, vehicle steering influence factor CrvFac, road altitude influence factor AltFac, vehicle acceleration influence factor AccFac, and vehicle weight influence factor MFac.

[0108] Specifically, the road slope impact factor GrdtFac, vehicle steering impact factor CrvFac, road altitude impact factor AltFac, vehicle acceleration impact factor AccFac, and vehicle weight impact factor MFac can all be found in the corresponding relationship. Specifically, you can first use the road slope impact parameters, vehicle steering impact parameters, road altitude impact parameters, vehicle acceleration impact parameters, and vehicle weight impact parameters measured by sensors or calculated by the transmission control unit during vehicle operation, and then find the corresponding impact factor based on the measured impact parameters and their respective corresponding relationships.

[0109] For example, if the road slope influence parameter is measured to be 5% while the vehicle is in motion, and then the correspondence between the road slope influence parameter and the road slope influence factor is looked up, the road slope influence factor is found to be 0.05.

[0110] It should be noted that all the correspondences in the embodiments of this application are pre-set and can be obtained based on a large number of experiments.

[0111] In one embodiment, the shift point to be corrected may include a base shift point (Base), a maximum shift point (Max), and a minimum shift point (Min), wherein the base shift point (Base), the maximum shift point (Max), and the minimum shift point (Min) are shift points corresponding to the current opening degree of the accelerator pedal. Specifically, they can be obtained based on the correspondence between the current opening degree of the accelerator pedal, the base shift point (Base), the maximum shift point (Max), and the minimum shift point (Min).

[0112] For example, if the current opening degree of the accelerator pedal is 20%, by looking up the correspondence between the current opening degree of the accelerator pedal, the base shift point (Base), the maximum shift point (Max), and the minimum shift point (Min), we can obtain the base shift point (Base) as a, the maximum shift point (Max) as b, and the minimum shift point (Min) as c.

[0113] After obtaining the main shift influence factor TemFac, the auxiliary shift influence factor, the base shift point Base, the maximum shift point Max, and the minimum shift point Min, the sum of the main shift influence factor and the auxiliary shift influence factor is first calculated. Then, based on the obtained sum, the method to correct the shift point to be corrected is determined.

[0114] In one embodiment, the sum of the primary shift influence factor and the secondary shift influence factor, FacShup, is: GrdtFac + CrvFac + AltFac + AccFac + MFac + TemFac.

[0115] Specifically, if FacShup is greater than or equal to zero, the corrected shift point is calculated based on the base shift point (Base), the maximum shift point (Max), and the sum of the values ​​(FacShup). Shift point = Basc + FacShup * (Max - Basc).

[0116] If FacShup is less than zero, the corrected shift point is calculated based on the base shift point Base, the minimum shift point Min, and the sum FacShup. Shift point = Min + FacShup * (Basc - Min).

[0117] In step 204, the corrected shift point is the first shift point, which is the first upshift point.

[0118] Step 205: Perform gear shifting control on the vehicle based on the corrected shift points.

[0119] Step 206: Determine whether a gear shift is needed based on the current opening degree of the accelerator pedal;

[0120] Step 207: After disengaging the gear, calculate the vehicle's internal resistance based on the vehicle's mass, acceleration, gradient resistance, rolling resistance, and air resistance; then complete the gear shifting operation.

[0121] Specifically, based on the vehicle mass m, vehicle acceleration a, and gradient resistance F... i Rolling resistance F f and air resistance F w Calculate the internal resistance of the vehicle

[0122] The specific calculation method is as follows:

[0123]

[0124] Where t is the sampling time from disengaging the gear to engaging the gear;

[0125] F f =Gf*cosα

[0126] Where G is the vehicle's weight, f is the rolling resistance coefficient, and α is the slope;

[0127]

[0128] Among them, C D ρ is the air resistance coefficient, A is the frontal area, ρ is the air density when shifting gears at low temperatures, and u is the vehicle speed.

[0129]

[0130] Where T is the ambient temperature and ρ0 is the air density under standard conditions;

[0131] F i =G sinα

[0132] Where G is the vehicle's weight and α is the slope.

[0133] Step 208: Determine whether the vehicle is shifting in low-temperature shift mode based on the current oil temperature of the automatic transmission and / or the current coolant temperature of the engine. If yes, proceed to step 209; otherwise, proceed to step 210.

[0134] Step 209: Based on the correspondence between the automatic transmission oil temperature, internal resistance, and shift influencing factors, find the main shift influencing factor corresponding to the current transmission oil temperature and the vehicle's internal resistance, and return to step 204.

[0135] In a specific embodiment, the automatic transmission's oil temperature and internal resistance... The correspondence between the shifting influence factor and the shifting influence factor is preset and can be displayed in tabular form, as shown in Table 2.

[0136] x:F(N)y:TEngCoolt(℃)

[0137]

[0138] Table 2

[0139] For example, if the vehicle's internal resistance is -200,000 N and the current oil temperature of the automatic transmission is -20°C, then the main shift influence factor to be found is 0.18.

[0140] After obtaining the main shift influence factor in step 209, the subsequent steps are the same as steps 204 and 205, and will not be repeated here.

[0141] Step 210: Use the normal shift line to control the vehicle's shifting.

[0142] It should be noted that after each gear shift, steps 206, 207, 208, 209, 204, and 205 will be executed in a loop.

[0143] In this embodiment of the application, gear shifting includes upshifting and downshifting. Typically, the first gear shift is upshifting, and subsequent gear shifts can be either upshifting or downshifting.

[0144] In this embodiment of the application, during the first gear shift in low-temperature shift mode, the main shift influencing factor is determined based on the current oil temperature of the automatic transmission and the current coolant temperature of the engine. The shift point to be corrected is then adjusted based on this determined main shift influencing factor. During the driving process in low-temperature shift mode, when the vehicle needs to shift gears, the main shift influencing factor is determined based on the current oil temperature of the automatic transmission and the internal resistance of the vehicle. The shift point to be corrected is then adjusted based on this determined main shift influencing factor. This achieves the purpose of correcting the shift point in low-temperature shift mode, thereby reducing frequent gear shifting operations, minimizing power interruptions, and improving vehicle performance.

[0145] Based on the same inventive concept, this application also provides a vehicle shifting device. The principle of this shifting device in solving the problem is similar to that of the above-mentioned vehicle shifting method, and the repeated parts will not be described again.

[0146] like Figure 3 As shown in the embodiment of this application, a vehicle gear shifting device includes:

[0147] The determination module 301 is used to determine, after the engine is started, whether the vehicle is shifting gears in a low-temperature mode based on the current oil temperature and / or the current coolant temperature of the engine.

[0148] The lookup module 302 is used to look up the main shifting influence factor corresponding to the current shifting influence parameter according to the correspondence between the shifting influence parameter and the shifting influence factor. The shifting influence parameter includes the current oil temperature and the current coolant temperature of the engine, or the shifting influence parameter includes the current oil temperature of the engine and the internal resistance of the vehicle.

[0149] The correction module 303 is used to correct the shift point to be corrected according to the main shift influence factor, the auxiliary shift influence factor and the shift point to be corrected, so as to obtain the corrected shift point. The auxiliary shift influence factor is determined according to the current state of the vehicle and / or the road conditions on which the vehicle is driving, and the shift point to be corrected is the shift point corresponding to the current opening degree of the accelerator pedal.

[0150] The control module 304 is used to perform shift control on the vehicle according to the corrected shift point.

[0151] In one possible implementation, if the shift control is the first shift controlled by the automatic transmission after the engine starts, then the lookup module 302 is specifically used for:

[0152] Based on the correspondence between automatic transmission oil temperature, engine coolant temperature, and shift influence factors, find the main shift influence factor corresponding to the current oil temperature and the current coolant temperature of the engine.

[0153] In one possible implementation, if the shift control is any shift other than the first shift controlled by the automatic transmission after the engine starts, then before searching for the main shift influence factor corresponding to the current shift influence parameter based on the correspondence between the shift influence parameter and the shift influence factor, the determining module 301 is further configured to:

[0154] Calculate the internal resistance of the vehicle based on its mass, acceleration, gradient resistance, rolling resistance, and air resistance.

[0155] The lookup module 302 is specifically used for:

[0156] Based on the correspondence between automatic transmission oil temperature, internal resistance, and shift influence factors, find the main shift influence factor corresponding to the current oil temperature and internal resistance of the engine.

[0157] In one possible implementation, the shift point to be corrected includes a base shift point, a maximum shift point, and a minimum shift point;

[0158] The correction module 303 is specifically used for:

[0159] If the sum of the main shift influence factor and the auxiliary shift influence factor is greater than or equal to zero, then the corrected shift point is calculated based on the basic shift point, the maximum shift point, and the sum.

[0160] If the sum of the main shift influence factor and the auxiliary shift influence factor is less than zero, then the corrected shift point is calculated based on the basic shift point, the minimum shift point, and the sum.

[0161] In one possible implementation, the correction module 303 is specifically used for:

[0162] Calculate the first difference between the maximum shift point and the basic shift point, multiply the first difference by the sum, and use the sum of the product and the basic shift point as the corrected shift point.

[0163] In one possible implementation, the correction module 303 is specifically used for:

[0164] Calculate the second difference between the base shift point and the minimum shift point, multiply the second difference by the sum, and use the sum of the product and the minimum shift point as the corrected shift point.

[0165] In one possible implementation, after performing shift control on the vehicle based on the corrected shift point, the determining module 301 is further configured to:

[0166] Based on the current oil temperature and / or the current coolant temperature of the engine, determine that the vehicle is shifting gears in normal temperature mode;

[0167] Control module 304 is specifically used for:

[0168] The vehicle is shifted according to the shift point corresponding to the normal temperature mode.

[0169] In one possible implementation, the auxiliary shift influence factor includes some or all of the following:

[0170] Factors affecting road slope;

[0171] Vehicle steering influencing factors;

[0172] Factors affecting road elevation;

[0173] Factors affecting vehicle acceleration;

[0174] Vehicle weight influencing factors.

[0175] Based on the same inventive concept, this application also provides an electronic device. The principle of this electronic device in solving the problem is similar to that of the gear shifting method of the vehicle described above, and the repeated parts will not be described again.

[0176] like Figure 4 The diagram shown is a structural schematic of an electronic device provided in this application. The electronic device includes:

[0177] Processor 401;

[0178] The memory 402 is communicatively connected to the processor 401 and is used to store executable instructions of the processor.

[0179] The processor is configured to execute the instructions to achieve the following steps:

[0180] After the engine starts, the vehicle is determined to use a low-temperature mode for gear shifting based on the current oil temperature of the automatic transmission and / or the current coolant temperature of the engine.

[0181] Based on the correspondence between shift influence parameters and shift influence factors, find the main shift influence factor corresponding to the current shift influence parameter. The shift influence parameter includes the current oil temperature of the automatic transmission and the current coolant temperature of the engine, or the shift influence parameter includes the current oil temperature of the automatic transmission and the internal resistance of the vehicle.

[0182] Based on the main shift influence factor, the auxiliary shift influence factor, and the shift point to be corrected, the shift point to be corrected is corrected to obtain the corrected shift point. The auxiliary shift influence factor is determined based on the current state of the vehicle and / or the road conditions on which the vehicle is traveling, and the shift point to be corrected is the shift point corresponding to the current opening degree of the accelerator pedal.

[0183] The vehicle is shifted according to the corrected shift point.

[0184] In one possible implementation, if the shift control is the first shift controlled by the automatic transmission after the engine starts, then the processor 401 is specifically used for:

[0185] Based on the correspondence between automatic transmission oil temperature, engine coolant temperature, and shift influence factors, find the main shift influence factor corresponding to the current oil temperature and the current coolant temperature of the engine.

[0186] In one possible implementation, if the shift control is any shift other than the first shift controlled by the automatic transmission after the engine starts, then before searching for the main shift influence factor corresponding to the current shift influence parameter based on the correspondence between the shift influence parameter and the shift influence factor, the processor 401 is further configured to:

[0187] Calculate the internal resistance of the vehicle based on its mass, acceleration, gradient resistance, rolling resistance, and air resistance.

[0188] The step of finding the main shifting influence factor corresponding to the current shifting influence parameter based on the correspondence between shifting influence parameters and shifting influence factors includes:

[0189] Based on the correspondence between automatic transmission oil temperature, internal resistance, and shift influence factors, find the main shift influence factor corresponding to the current oil temperature and internal resistance of the engine.

[0190] In one possible implementation, the shift point to be corrected includes a base shift point, a maximum shift point, and a minimum shift point;

[0191] Processor 401 is specifically used for:

[0192] If the sum of the main shift influence factor and the auxiliary shift influence factor is greater than or equal to zero, then the corrected shift point is calculated based on the basic shift point, the maximum shift point, and the sum.

[0193] If the sum of the main shift influence factor and the auxiliary shift influence factor is less than zero, then the corrected shift point is calculated based on the basic shift point, the minimum shift point, and the sum.

[0194] In one possible implementation, processor 401 is specifically used for:

[0195] Calculate the first difference between the maximum shift point and the basic shift point, multiply the first difference by the sum, and use the sum of the product and the basic shift point as the corrected shift point.

[0196] In one possible implementation, processor 401 is specifically used for:

[0197] Calculate the second difference between the base shift point and the minimum shift point, multiply the second difference by the sum, and use the sum of the product and the minimum shift point as the corrected shift point.

[0198] In one possible implementation, after performing shift control on the vehicle based on the corrected shift point, the processor 401 is further configured to:

[0199] Based on the current oil temperature and / or the current coolant temperature of the engine, determine that the vehicle is shifting gears in normal temperature mode;

[0200] The vehicle is shifted according to the shift point corresponding to the normal temperature mode.

[0201] In one possible implementation, the auxiliary shift influence factor includes some or all of the following:

[0202] Factors affecting road slope;

[0203] Vehicle steering influencing factors;

[0204] Factors affecting road elevation;

[0205] Factors affecting vehicle acceleration;

[0206] Vehicle weight influencing factors.

[0207] This invention also provides a storage medium that, when the instructions in the storage medium are executed by the processor of an electronic device, enables the electronic device to perform the vehicle shifting method.

[0208] In an exemplary embodiment, the storage medium, such as a memory including instructions, can be executed by a processor of an electronic device to complete the aforementioned vehicle shifting method. Optionally, the storage medium can be a non-transitory computer-readable storage medium, such as a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device.

[0209] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention described herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not invented herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0210] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for shifting gears in a vehicle, characterized in that, An automatic transmission used in a vehicle, the method comprising: After the engine starts, based on the current oil temperature of the automatic transmission and the current coolant temperature of the engine, the vehicle is determined to use a low-temperature mode for gear shifting; Based on the correspondence between shift influence parameters and shift influence factors, the main shift influence factor corresponding to the current shift influence parameter is found. If the shift control is the first shift controlled by the automatic transmission after the engine starts, the shift influence parameter includes the current oil temperature of the automatic transmission and the current coolant temperature of the engine. If the shift control is any shift other than the first shift controlled by the automatic transmission after the engine starts, the shift influence parameter includes the current oil temperature of the automatic transmission and the internal resistance of the vehicle. Based on the main shift influence factor, the auxiliary shift influence factor, and the shift point to be corrected, the shift point to be corrected is corrected to obtain the corrected shift point. The auxiliary shift influence factor is determined based on the current state of the vehicle and the road conditions on which the vehicle is traveling, and the shift point to be corrected is the shift point corresponding to the current opening degree of the accelerator pedal. The vehicle is shifted according to the corrected shift point.

2. The method as described in claim 1, characterized in that, If the shift control is the first shift controlled by the automatic transmission after the engine starts, then the step of finding the main shift influence factor corresponding to the shift influence parameter based on the correspondence between the shift influence parameter and the shift influence factor includes: Based on the correspondence between automatic transmission oil temperature, engine coolant temperature, and shift influence factors, find the main shift influence factor corresponding to the current oil temperature and the current coolant temperature of the engine.

3. The method as described in claim 1, characterized in that, If the shift control refers to shifts other than the initial shift controlled by the automatic transmission after engine startup, then before finding the primary shift influence factor corresponding to the current shift influence parameter based on the correspondence between shift influence parameters and shift influence factors, the method further includes: Calculate the internal resistance of the vehicle based on its mass, acceleration, gradient resistance, rolling resistance, and air resistance. The step of finding the main shifting influence factor corresponding to the current shifting influence parameter based on the correspondence between shifting influence parameters and shifting influence factors includes: Based on the correspondence between automatic transmission oil temperature, internal resistance, and shift influence factors, find the main shift influence factor corresponding to the current oil temperature and internal resistance of the engine.

4. The method as described in claim 1, characterized in that, The shift points to be corrected include the basic shift point, the maximum shift point, and the minimum shift point; The step of correcting the shift point to be corrected based on the main shift influence factor, the auxiliary shift influence factor, and the shift point to be corrected includes: If the sum of the main shift influence factor and the auxiliary shift influence factor is greater than or equal to zero, then the corrected shift point is calculated based on the basic shift point, the maximum shift point, and the sum. If the sum of the main shift influence factor and the auxiliary shift influence factor is less than zero, then the corrected shift point is calculated based on the basic shift point, the minimum shift point, and the sum.

5. The method as described in claim 4, characterized in that, The process of calculating the corrected shift point based on the base shift point, the maximum shift point, and the sum includes: Calculate the first difference between the maximum shift point and the basic shift point, multiply the first difference by the sum, and use the sum of the product and the basic shift point as the corrected shift point.

6. The method as described in claim 4, characterized in that, The process of calculating the corrected shift point based on the base shift point, the minimum shift point, and the sum includes: Calculate the second difference between the base shift point and the minimum shift point, multiply the second difference by the sum, and use the sum of the product and the minimum shift point as the corrected shift point.

7. The method according to any one of claims 1-6, characterized in that, After controlling the vehicle's gear shifts based on the corrected shift point, the method further includes: Based on the current oil temperature and the current coolant temperature of the engine, it is determined that the vehicle is shifting gears in normal temperature mode; The vehicle is shifted according to the shift point corresponding to the normal temperature mode.

8. The method according to any one of claims 1-6, characterized in that, The auxiliary shifting influence factor includes some or all of the following: Factors affecting road slope; Vehicle steering influencing factors; Factors affecting road elevation; Factors affecting vehicle acceleration; Vehicle weight influencing factors.

9. A gear shifting device for a vehicle, characterized in that, include: The determination module is used to determine, after the engine starts, whether the vehicle should use a low-temperature mode for gear shifting based on the current oil temperature and the current coolant temperature of the engine. The lookup module is used to find the main shift influencing factor corresponding to the current shift influencing parameter based on the correspondence between shift influencing parameters and shift influencing factors. If the shift control is the first shift controlled by the automatic transmission after the engine starts, the shift influencing parameters include the current oil temperature and the current coolant temperature of the engine. If the shift control is any shift other than the first shift controlled by the automatic transmission after the engine starts, the shift influencing parameters include the current oil temperature of the engine and the internal resistance of the vehicle. The correction module is used to correct the shift point to be corrected based on the main shift influence factor, the auxiliary shift influence factor and the shift point to be corrected, so as to obtain the corrected shift point. The auxiliary shift influence factor is determined based on the current state of the vehicle and the road conditions on which the vehicle is driving, and the shift point to be corrected is the shift point corresponding to the current opening degree of the accelerator pedal. The control module is used to control the vehicle's gear shifting based on the corrected shift points.

10. An electronic device, characterized in that, include: processor; The memory, which is communicatively connected to the processor, is used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the gear shifting method of the vehicle as described in any one of claims 1 to 8.

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