Gear shifting control method and device, equipment and medium

Abstract

The embodiment of the invention relates to a gear shifting control method and device, equipment and a medium, and the method comprises the steps that under the condition that an exhaust braking unit of a target vehicle is in an activated state, whether associated working condition information of the target vehicle meets gear shifting control conditions or not is judged; wherein the associated working condition information is working condition information having an association relationship with the exhaust braking unit; if the associated working condition information meets the gear shifting control condition, the clutch pressure value of the target vehicle is determined according to the engine rotating speed of the target vehicle; and gear shifting control is conducted on the target vehicle according to the clutch pressure value. According to the scheme, fine control over the clutch pressure value based on the engine rotating speed is achieved under the actual action of the exhaust brake unit, clutch control is more accurate during gear shifting, gear shifting impact is avoided, the reliability of the hydraulic automatic transmission is improved, power output is more stable, and the gear shifting experience of a user is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a shift control method, device, equipment, and medium. Background Art

[0002] In order to reduce the risk of brake failure caused by prolonged braking when driving on a heavy load or long downhill slope, some vehicles have added an engine exhaust braking function to ensure safety. The engine exhaust braking function can assist the entire vehicle in braking and improve the braking safety of the entire vehicle.

[0003] In related technologies, during exhaust braking, the torque sent by the engine to the hydraulic automatic transmission is the negative maximum torque, which will cause the clutch control pressure calculated by the hydraulic automatic transmission based on the torque to be too large, resulting in gear shift shock, damage to the hardware of the hydraulic automatic transmission, and a poor gear shifting experience for the user. Summary of the Invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a shift control method, device, equipment and medium.

[0005] An embodiment of the present disclosure provides a shift control method, including: When the exhaust brake unit of the target vehicle is in an activated state, determining whether the associated operating condition information of the target vehicle meets the shift control condition; wherein the associated operating condition information is operating condition information having an associated relationship with the exhaust brake unit; If the associated operating condition information satisfies the shift control condition, determining a clutch pressure value of the target vehicle according to the engine speed of the target vehicle; Gear shifting is controlled on the target vehicle according to the clutch pressure value.

[0006] The present disclosure also provides a shift control device, comprising: a judgment module, configured to judge whether the associated operating condition information of the target vehicle satisfies the shift control condition when the exhaust brake unit of the target vehicle is in an activated state; wherein the associated operating condition information is operating condition information having an associated relationship with the exhaust brake unit; a first determining module, configured to determine a clutch pressure value of the target vehicle according to an engine speed of the target vehicle if the associated operating condition information satisfies the shift control condition; A gear shifting module is used to control the gear shifting of the target vehicle according to the clutch pressure value.

[0007] An embodiment of the present disclosure also provides an electronic device, which includes: a processor; a memory for storing executable instructions of the processor; the processor is used to read the executable instructions from the memory and execute the instructions to implement the gear shift control method provided in the embodiment of the present disclosure.

[0008] An embodiment of the present disclosure further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program is used to execute the shift control method provided by the embodiment of the present disclosure.

[0009] The technical solution provided by the embodiments of the present disclosure has the following advantages over the prior art: the shift control solution provided by the embodiments of the present disclosure includes: when the exhaust brake unit of a target vehicle is in an activated state, determining whether the associated operating condition information of the target vehicle meets the shift control condition; wherein the associated operating condition information is operating condition information associated with the exhaust brake unit; if the associated operating condition information meets the shift control condition, determining the clutch pressure value of the target vehicle based on the engine speed of the target vehicle; and performing shift control on the target vehicle based on the clutch pressure value. Using the above technical solution, when the exhaust brake unit of the vehicle is in an activated state and the operating condition information related to the exhaust brake unit of the vehicle meets the shift control condition, the clutch pressure value is determined based on the engine speed and the vehicle is shifted based on the clutch pressure value; whether the exhaust brake is actually applied is determined based on the state setting of the exhaust brake unit and the actual operating condition of the vehicle related to the exhaust brake; and when the exhaust brake is actually applied, refined control of the clutch pressure value based on the engine speed is achieved, thereby making clutch control more precise during shifting, avoiding shift shock, improving the reliability of the hydraulic automatic transmission, making power output smoother, and improving the shifting experience of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0011] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0012] Figure 1 A schematic flow chart of a shift control method provided in an embodiment of the present disclosure; Figure 2 A schematic flow chart of another shift control method provided in an embodiment of the present disclosure; Figure 3 A schematic diagram of a gear shift control method provided by an embodiment of the present disclosure; Figure 4 A schematic structural diagram of a gear shift control device provided in an embodiment of the present disclosure; Figure 5 A schematic structural diagram of an electronic device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0013] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0014] As automatic transmission technology matures, the proportion of cars equipped with automatic transmissions in the market is gradually increasing, and the usage rate of automatic transmission cars in daily use is also relatively high. As users' requirements for comfort become increasingly higher, the requirements for the quality and reliability of automatic transmission shifting are also becoming higher and higher.

[0015] In the related art, in order to improve safety and reduce the risk of brake failure caused by prolonged braking in the case of high loads and long downhill slopes, some vehicles have an engine exhaust braking function. The engine exhaust braking function can assist the braking of the entire vehicle and improve the braking safety of the entire vehicle. However, the torque accuracy of the diesel engine of the vehicle in the related art is poor. During exhaust braking, the torque sent by the engine to the hydraulic automatic transmission is the negative maximum torque during reverse drag. However, this negative maximum torque is not the torque actually output by the engine, which causes the clutch control pressure calculated by the hydraulic automatic transmission based on this torque to be too large, resulting in gear shift shock, damage to the hardware of the hydraulic automatic transmission, and a poor gear shifting experience for the user. It can be seen that in the related art, the control strategy for automatic transmission vehicles has the problem of unrealistic torque sent by the engine during exhaust braking and poor torque accuracy.

[0016] In order to solve the above problems, an embodiment of the present disclosure provides a shift control method, which is introduced below in conjunction with specific embodiments.

[0017] Figure 1 This is a flow chart of a shift control method provided by an embodiment of the present disclosure. The shift control method can be applied to a shift control device. The shift control device can be implemented using software and / or hardware. The shift control device can generally be integrated into an electronic device, which can be an automatic transmission control unit (TCU). Figure 1 As shown, the shift control method includes: Step 101 : When the exhaust brake unit of the target vehicle is in an activated state, determine whether the associated operating condition information of the target vehicle meets the shift control condition; wherein the associated operating condition information is operating condition information associated with the exhaust brake unit.

[0018] The target vehicle may be a vehicle equipped with an automatic transmission control unit that utilizes the shift control method. The target vehicle may be an automatic transmission automobile with a diesel engine. This embodiment does not impose any restrictions on the use of the target vehicle; for example, the target vehicle may be a commercial vehicle. The exhaust brake unit may be a unit in the target vehicle that implements the exhaust brake function, also known as in-cylinder braking or reverse braking. This exhaust brake function adjusts the engine's exhaust passage to increase the pressure during the exhaust stroke, thereby generating a braking force using the generated negative pressure. The activation state indicates that the corresponding function has been enabled, but does not indicate that the function has actually been activated. Actual activation can be understood as the generation of a corresponding braking force by the exhaust brake function. The associated operating condition information may be operating condition information associated with the activation of the exhaust brake function, and this associated operating condition information can be used to determine whether the exhaust brake function has actually been activated. The shift control condition may be a pre-set condition for determining whether shift control is to be performed based on the engine speed. This shift control condition can be used to indicate that the exhaust brake function of the target vehicle has been activated, as determined based on the associated operating condition information.

[0019] In the disclosed embodiment, while the target vehicle is in motion, the user can activate the exhaust brake unit using the exhaust brake switch as needed. The shift control device can detect the exhaust brake unit's status indicator in real time. If the status indicator indicates an activated state, the device obtains associated operating condition information of the target vehicle and determines whether the associated operating condition information satisfies the shift control conditions.

[0020] Step 102 : If the associated operating condition information satisfies the shift control condition, a clutch pressure value of the target vehicle is determined according to the engine speed of the target vehicle.

[0021] The engine speed may be the number of revolutions of the engine crankshaft per unit time. The clutch pressure value, also known as the clutch control pressure value, may be the pressure acting on the clutch plate in the clutch. This embodiment does not limit the type of clutch.

[0022] In the disclosed embodiment, if the shift control device determines that the associated operating condition information satisfies the shift control conditions, this indicates that the exhaust brake unit of the target vehicle is in an activated state and has been effectively engaged, necessitating subsequent shift control during the exhaust brake period. The shift control device may obtain the target vehicle's engine speed and directly determine the clutch pressure value based on the engine speed and a pre-calibrated relationship between speed and pressure. Alternatively, the clutch pressure value may be indirectly determined by determining torque based on the engine speed and the pre-calibrated relationship between torque and pressure using torque as a bridge.

[0023] In some embodiments of the present disclosure, the associated operating condition information includes user operation information and vehicle operation information, and the shift control condition includes a first shift control condition in the user operation dimension and a second shift control condition in the vehicle operation dimension.

[0024] The user operation information may be operating condition information adjusted through user operation. The vehicle operation information may be operating condition information representing the vehicle's operating conditions, and the vehicle operation information may be operating condition information that cannot be directly adjusted through user operation. The first shift control condition may be a condition for determining whether to perform shift control based on engine speed in the user operation dimension, and the first shift control condition may have a one-to-one correspondence with the user operation information. The second shift control condition may be a condition for determining whether to perform shift control based on engine speed in the vehicle operation dimension, and the second shift control condition may have a one-to-one correspondence with the vehicle operation information.

[0025] In some embodiments of the present disclosure, the associated operating condition information satisfies the shift control condition, including: the user operation information satisfies the first shift control condition, and the vehicle operation information satisfies the second shift control condition.

[0026] In this embodiment, the shift control device can obtain first user operation information and determine whether the first user operation information satisfies the first shift control condition. If so, it means that the situation of the target vehicle in the user operation dimension matches the user operation situation when the exhaust brake unit is actually in effect. The shift control device can obtain second user operation information and determine whether the second user operation information satisfies the second shift control condition. If so, it means that the situation of the target vehicle in the vehicle operation dimension matches the vehicle operation situation when the exhaust brake unit is actually in effect. When both the first shift control condition and the second shift control condition are met, the shift control device can send an instruction to activate the subsequent shift control function through the instruction.

[0027] In the above scheme, whether the exhaust braking function of the target vehicle is actually effective is determined from two dimensions: user operation and vehicle operation. Subsequent gear shifting control is performed when it is actually effective, so that the timing of gear shifting control is more adapted to the current situation of the vehicle.

[0028] In some embodiments of the present disclosure, user operation information includes accelerator pedal opening and / or driving mode, and the user operation information satisfies the first gear shift control condition, including: the accelerator pedal opening is not greater than a preset opening threshold; and / or the driving mode does not belong to a preset terrain mode; wherein the preset terrain mode includes at least one of a multi-drive mode, a sand mode, and an off-road mode.

[0029] The accelerator pedal opening can be used to indicate the degree to which the user is currently depressing the accelerator pedal. The preset opening threshold can be a pre-set threshold for determining whether the user is not depressing the accelerator or has only slightly depressed the accelerator. This preset opening threshold can be set based on, for example, the accelerator sensitivity of the target vehicle. The lower the accelerator sensitivity, the higher the preset opening value can be. This allows for continued processing even when the engine is not responding significantly but the accelerator pedal opening is not zero. For example, the preset opening threshold can be 0 or 5.

[0030] A driving mode can be a mode that adjusts the vehicle for specific road conditions or specific driving requirements. The driving mode can include a shifting pattern corresponding to the specific road conditions or specific driving requirements. A preset terrain mode can be a driving mode set for terrain without long downhill slopes. A multi-wheel drive mode can be a mode that distributes engine power to two or more wheels. This multi-wheel drive mode can include a four-wheel drive mode, etc., and is commonly used in terrain with continuous uphill and downhill rotation. A sand mode can be a driving mode set for sandy terrain. An off-road mode can be a driving mode set for off-road terrain.

[0031] Optionally, the user operation information includes accelerator pedal opening, and the user operation information satisfies the first shift control condition, including: the accelerator pedal opening is not greater than a preset opening threshold. Alternatively, the user operation information includes a driving mode, and the user operation information satisfies the first shift control condition, including: the driving mode does not fall within a preset terrain mode. Alternatively, the user operation information includes accelerator pedal opening and a driving mode, and the user operation information satisfies the first shift control condition, including: the accelerator pedal opening is not greater than a preset opening threshold, and the driving mode does not fall within a preset terrain mode.

[0032] In this embodiment, the engine control system transmits the accelerator pedal opening to the shift control device. Upon receiving this information, the shift control device determines whether it is less than a preset opening threshold. If so, this indicates that the driver has not triggered throttle opening or a powertrain response, and the target vehicle satisfies the shift control conditions based on the accelerator pedal opening dimension. Generally, the driver does not need to brake or engage exhaust braking when triggering a powertrain response. This determination process determines whether the target vehicle's exhaust braking function is currently engaged based on the accelerator pedal opening dimension.

[0033] In this embodiment, the shift control system can obtain a mode signal representing the target vehicle's current driving mode and analyze the mode signal. If the driving mode is determined to be normal mode or a customized long downhill mode, i.e., if the driving mode does not belong to the preset terrain mode, this indicates that the target vehicle is not currently in terrain without continuous downhill sections, such as off-road or sandy terrain, and may be driving continuously downhill. Therefore, the target vehicle meets the shift control conditions in the driving mode dimension. Since exhaust braking is not required in terrains such as continuous uphill and downhill sections, sandy terrain, and off-road, which do not have long downhill sections, this determination determines whether the exhaust braking function is actually activated in the driving mode dimension.

[0034] In some embodiments of the present disclosure, the vehicle operating information includes a target gear value and / or an engine speed, and the vehicle operating information satisfies the second gear shift control, including: the target gear value is not less than a preset gear value; and / or the exhaust braking torque determined according to the engine speed is not greater than a preset torque threshold.

[0035] Among them, the target gear value can represent the gear that the target vehicle is currently adapted to, and the target gear value can be used to represent the gear that the target vehicle is currently in, or the gear that needs to be switched to at present. The preset gear value can be the minimum gear value when the preset exhaust braking function actually takes effect. This embodiment does not limit the preset gear value. For example, the preset gear value can be 2nd gear. The exhaust braking torque can be understood as the actual torque output by the engine. The preset torque threshold can be used to determine whether the exhaust braking function is effective on the actual torque output by the engine. This embodiment does not limit the preset torque threshold. For example, the preset torque threshold can be 0 or a smaller value approximately 0.

[0036] Optionally, the vehicle operating information includes a target gear value, and the vehicle operating information satisfies the second shift control, including: the target gear value is not less than a preset gear value. Alternatively, the vehicle operating information includes engine speed, and the vehicle operating information satisfies the second shift control, including: the exhaust brake torque determined based on the engine speed is not greater than a preset torque threshold. Alternatively, the vehicle operating information includes the target gear value and engine speed, and the vehicle operating information satisfies the second shift control, including: the target gear value is not less than the preset gear value, and the exhaust brake torque determined based on the engine speed is not greater than the preset torque threshold.

[0037] In this embodiment, an automatic transmission control system, which may be a hydraulic automatic transmission control system, sends a target gear value to a shift control device. The shift control device receives the target gear value and determines whether it is within a preset gear index. If so, the target gear value is no less than the preset gear value, and the target vehicle satisfies the gear-related shift control conditions. The preset gear index may be a list of gear values available to the vehicle that are no less than the preset gear value. Because the exhaust brake function is less likely to actually function in lower gears with a greater speed ratio, the target gear value is used to determine whether the target vehicle's gear matches the exhaust brake function.

[0038] In this embodiment, the engine can transmit its exhaust brake torque to the shift control device. The shift control device receives the exhaust brake torque and determines whether it is less than or equal to a preset torque threshold. If so, the exhaust brake function is considered to be in effect. Therefore, whether the exhaust brake function is actually applied is determined based on whether the exhaust brake function is actually applied to the torque output by the engine.

[0039] Figure 2 This is a flow chart of another shift control method provided in an embodiment of the present disclosure, such as Figure 2 As shown, determining the clutch pressure value of the target vehicle according to the engine speed of the target vehicle includes: Step 201 : Determine input torque based on exhaust brake torque; wherein the exhaust brake torque is determined according to engine speed.

[0040] The input torque may be the torque input to the pressure calculation unit to determine the clutch pressure value. The input torque may be understood as a direct basis for determining the clutch pressure value.

[0041] In this embodiment, the shift control device may determine the exhaust brake torque as the input torque. Alternatively, the shift control device may use the maximum negative torque as the starting value of the input torque and gradually reach the exhaust brake torque.

[0042] In some embodiments of the present disclosure, the input torque is determined based on the exhaust brake torque, including: determining the calculated torque corresponding to the current moment according to the current moment and the torque change function; wherein the torque change function is determined according to the initial moment when the gear shift control condition is met, the negative maximum torque and a pre-set function parameter value; if the calculated torque is not greater than the exhaust brake torque, the calculated torque is determined as the input torque; if the calculated torque is greater than the exhaust brake torque, the exhaust brake torque is determined as the input torque.

[0043] Among them, the initial moment can be the moment when the shift control conditions are determined to be met. The torque change function can be used to determine the torque value in the process of gradually changing from the negative maximum torque to the exhaust braking torque. The negative maximum torque can be the maximum torque output in the negative direction of the engine of the target vehicle. The negative direction can be the torque direction when braking the target vehicle. The negative maximum torque can be understood as the minimum torque of the target vehicle. The function parameter value can be a specific value pre-set for the parameter in the function. This embodiment does not limit the function parameter value. Taking the torque change function as a linear function as an example, the function parameter value can be the slope. The calculated torque can be the intermediate torque in the process of gradually changing from the negative maximum torque to the exhaust torque value.

[0044] In this embodiment, the initial moment when the shift control conditions are met is determined. To avoid a sudden change in torque from negative maximum torque to exhaust brake torque, the shift control device may determine the torque corresponding to the initial moment in the torque variation function as the negative maximum torque. The torque variation function is then determined based on pre-set function parameter values, combined with the initial moment and the negative maximum torque, to determine the calculated torque corresponding to the current moment in the torque variation function. A determination is then made as to whether the calculated torque is greater than the exhaust brake torque. If the calculated torque is less than or equal to the exhaust brake torque, this indicates that the torque direction is both negative and the calculated torque value is greater than or equal to the exhaust brake torque, indicating that the torque is still in the gradual change phase. Therefore, the calculated torque is determined as the input torque. If the calculated torque is greater than the exhaust brake torque, this indicates that the torque direction is both negative and the calculated torque value is less than the exhaust brake torque, indicating that the gradual change phase has been completed. Therefore, the exhaust brake torque is determined as the input torque.

[0045] In the above scheme, the input torque is gradually changed from the negative maximum torque to the exhaust brake torque. The gradual change of the input torque is realized by the gradual change of the clutch pressure determined subsequently, and the smooth control of the clutch pressure is realized, thereby further improving the smoothness of the gear shift.

[0046] In step 202 , the input torque is input to a pressure calculation unit of the target vehicle, so that the pressure calculation unit determines a clutch pressure value according to the input torque.

[0047] The pressure calculation unit may be a functional unit for determining the clutch pressure according to the torque, and the pressure calculation unit may be an existing unit in the vehicle.

[0048] In this embodiment, the shift control device may input the input torque to the pressure calculation unit of the target vehicle, and the pressure calculation unit receives the input torque and calculates the clutch pressure value according to the input torque.

[0049] In the above scheme, the clutch pressure value is determined based on the engine speed with torque as the intermediate quantity, so that the gear shift control method can be implemented with the help of the existing pressure calculation unit that calculates the clutch pressure value based on torque, thereby improving the adaptability of the gear shift control method to existing vehicles and reducing the cost of applying the gear shift control method.

[0050] Step 103 : performing gear shifting control on the target vehicle according to the clutch pressure value.

[0051] In the disclosed embodiment, during the gear shifting process, the gear shift control device may apply pressure to the clutch plate according to the clutch pressure value, thereby achieving gear shifting control of the target vehicle.

[0052] The shift control method provided by the disclosed embodiment includes: determining whether the target vehicle's associated operating condition information satisfies a shift control condition when the exhaust brake unit of the target vehicle is activated; wherein the associated operating condition information is operating condition information associated with the exhaust brake unit; if the associated operating condition information satisfies the shift control condition, determining a clutch pressure value of the target vehicle based on the engine speed of the target vehicle; and performing shift control on the target vehicle based on the clutch pressure value. Using the above technical solution, when the vehicle's exhaust brake unit is activated and the vehicle's operating condition information associated with the exhaust brake unit satisfies the shift control condition, the clutch pressure value is determined based on the engine speed and the vehicle is shifted based on the clutch pressure value. Whether the exhaust brake is actually engaged is determined based on the exhaust brake unit status setting and the vehicle's actual operating condition associated with the exhaust brake. When the exhaust brake is actually engaged, refined control of the clutch pressure value based on the engine speed is achieved, thereby achieving more precise clutch control during shifting, avoiding shift shock, improving the reliability of the hydraulic automatic transmission, making power output smoother, and enhancing the user's shifting experience.

[0053] In some embodiments of the present disclosure, the shift control method further includes: determining the exhaust brake torque based on the engine speed and a pre-calibrated speed-torque model; wherein the speed-torque model is determined by adjusting the pedal characteristic model corresponding to the target vehicle based on the driver's torque feedback information.

[0054] The speed-torque model may be a mathematical model representing the relationship between engine speed and exhaust brake torque. Torque feedback information may be used to represent the driver's perceived torque at a specific engine speed. This torque feedback information may include information indicating that the perceived torque is greater than the torque determined based on the pedal characteristic model, information indicating that the perceived torque is less than the torque determined based on the pedal characteristic model, information indicating that the perceived torque is consistent with the torque determined based on the pedal characteristic model, and so on. The pedal characteristic model may be a mathematical model representing the relationship between engine speed and exhaust brake torque determined based on a pedal characteristic map (Pedal Map).

[0055] In this embodiment, a pedal characteristic map is pre-calibrated for the target vehicle. Based on this map, a pedal characteristic model representing the relationship between the target vehicle's engine speed and exhaust brake torque can be determined. To further improve the accuracy of the exhaust brake torque determined by this model, subjective driver feedback on torque at specific engine speeds during vehicle operation can be collected to generate torque feedback information. Based on this torque feedback information, a speed-torque model is fitted and adjusted to obtain a speed-torque model. After determining the engine speed, the shift control device can substitute this engine speed into the speed-torque model to obtain the exhaust brake torque corresponding to that engine speed.

[0056] In the above scheme, the existing pedal characteristic model is adjusted to obtain a speed-torque model, which makes the relationship between the target vehicle engine speed and the exhaust brake torque more accurate. The exhaust brake torque determined based on the speed-torque model is also more accurate, creating a basis for smooth gear shifting control.

[0057] Next, a specific example is used to further illustrate the shift control method in an embodiment of the present disclosure. In this embodiment, during normal vehicle driving, the exhaust brake function switch is on, the accelerator is released and the vehicle coasts, or the brake is applied after the accelerator is released, and the shift clutch pressure is controlled based on the exhaust brake torque, thereby improving shift comfort and reliability. The method specifically includes the following steps: first, detecting the vehicle state; if the exhaust brake function switch is on while the vehicle is driving, determining whether the accelerator pedal opening is not greater than a preset opening threshold; if so, determining whether the target gear value belongs to a preset gear index; if so, determining whether the driving mode belongs to a preset terrain mode; if so, determining whether the exhaust brake torque is not greater than a preset torque threshold; if so, turning on the clutch control function, and causing the torque from the function activation timer to reach the calculated exhaust brake torque according to a certain slope, and performing shift clutch pressure control based on the preset exhaust brake torque.

[0058] Figure 3 A schematic diagram of a shift control method provided by an embodiment of the present disclosure is shown in FIG. Figure 3 As shown, the target vehicle can be a commercial automatic transmission vehicle. While the target vehicle is driving, the exhaust brake unit is activated via the exhaust brake switch. The hydraulic automatic transmission control system receives the accelerator pedal opening from the engine control system. If the accelerator pedal opening is less than or equal to the preset opening threshold, the subsequent target gear value is determined. If the accelerator pedal opening is greater than the preset opening threshold, the accelerator pedal opening is continuously monitored. If the target gear value sent by the hydraulic automatic transmission control system is within the preset gear index, the subsequent driving mode is determined. If the target gear value is not within the preset gear index, the target gear value is continuously monitored. If the driving mode sent by the hydraulic automatic transmission control system does not fall within the preset terrain mode, the subsequent exhaust brake torque is determined. If the driving mode falls within the preset terrain mode, the driving mode is continuously monitored. If the exhaust brake torque sent by the engine is greater than the preset torque threshold, the exhaust brake torque is continuously monitored. If the exhaust brake torque sent by the engine is not greater than the preset torque threshold, indicating that the shift control conditions for the aforementioned different dimensional restrictions are met, the hydraulic automatic transmission control system issues a command to activate the exhaust brake shift clutch control. The torque used by the shifting clutch needs to determine the exhaust brake torque corresponding to different engine speeds based on the engine's torque constant. When the exhaust brake switch is activated, the hydraulic automatic transmission control system receives the required torque value sent by the engine. The required torque value can be the negative maximum torque. The calculated torque of the input pressure calculation unit changes from the negative maximum torque to the corresponding exhaust brake torque according to a preset slope. The shifting clutch controls the clutch pressure based on the input torque, so that the clutch control pressure is accurate and stable, and the gear shifting is smooth.

[0059] The gear shift control method provided by the embodiment of the present disclosure is that the exhaust brake unit of the target vehicle is activated. When the exhaust brake torque, accelerator pedal opening, target gear value and driving mode meet the corresponding conditions at the same time, the gear shift clutch controls the gear shift clutch pressure based on the exhaust brake torque. By adding a corresponding judgment strategy in the automatic transmission control unit software, the exhaust brake torque is determined according to the engine speed and then the clutch pressure is controlled. The negative maximum torque sent by the engine is no longer used, so that the clutch control during gear shifting is more precise and smooth, the power output is more stable, the gear shifting is more comfortable, and the reliability of the hydraulic automatic transmission is guaranteed.

[0060] Figure 4 This is a schematic diagram of the structure of a shift control device provided by an embodiment of the present disclosure. The device can be implemented by software and / or hardware, and the device can also be integrated into an electronic device. Figure 4 As shown, the shift control device includes: The judgment module 401 is configured to judge whether the associated operating condition information of the target vehicle satisfies the shift control condition when the exhaust brake unit of the target vehicle is activated; wherein the associated operating condition information is operating condition information associated with the exhaust brake unit; a first determining module 402 configured to determine a clutch pressure value of the target vehicle according to an engine speed of the target vehicle if the associated operating condition information satisfies the shift control condition; The gear shift module 403 is configured to control the gear shifting of the target vehicle according to the clutch pressure value.

[0061] Optionally, the associated operating condition information includes user operation information and vehicle operation information, and the shift control condition includes a first shift control condition in the user operation dimension and a second shift control condition in the vehicle operation dimension. The associated operating condition information satisfies the shift control condition, including: The user operation information satisfies the first shift control condition, and the vehicle operation information satisfies the second shift control condition.

[0062] Optionally, the user operation information includes an accelerator pedal opening and / or a driving mode, and the user operation information satisfies the first shift control condition, including: The accelerator pedal opening is not greater than a preset opening threshold; and / or the driving mode does not belong to a preset terrain mode; wherein the preset terrain mode includes at least one of a multi-drive mode, a sand mode, and an off-road mode.

[0063] Optionally, the vehicle operation information includes a target gear value and / or the engine speed, and the vehicle operation information satisfies the second shift control, including: The target gear value is not less than a preset gear value; and / or the exhaust brake torque determined according to the engine speed is not greater than a preset torque threshold.

[0064] Optionally, determining the clutch pressure value of the target vehicle according to the engine speed of the target vehicle includes: Determining an input torque based on an exhaust brake torque; wherein the exhaust brake torque is determined according to the engine speed; The input torque is input to a pressure calculation unit of the target vehicle, so that the pressure calculation unit determines the clutch pressure value according to the input torque.

[0065] Optionally, determining the input torque based on the exhaust brake torque includes: Determining a calculated torque corresponding to the current moment according to the current moment and a torque change function; wherein the torque change function is determined according to an initial moment when the shift control condition is satisfied, a negative maximum torque, and a preset function parameter value; If the calculated torque is not greater than the exhaust brake torque, determining the calculated torque as the input torque; If the calculated torque is greater than the exhaust brake torque, the exhaust brake torque is determined as the input torque.

[0066] Optionally, the shift control device further includes: The second determination module is used to determine the exhaust brake torque according to the engine speed and a pre-calibrated speed-torque model; wherein the speed-torque model is determined by adjusting the pedal characteristic model corresponding to the target vehicle according to the driver's torque feedback information.

[0067] It should be noted that Figure 4 The shift control device shown can execute the various steps in the above-mentioned shift control method embodiment and realize the various processes and effects in the above-mentioned shift control method embodiment, which will not be described in detail here.

[0068] Figure 5 This is a schematic diagram of the structure of an electronic device provided by an embodiment of the present disclosure. Figure 5 As shown, the electronic device 500 includes one or more processors 501 and a memory 502 .

[0069] The processor 501 may be a central processing unit (CPU) or other forms of processing units having a gear shift control capability and / or an instruction execution capability, and may control other components in the electronic device 500 to perform desired functions.

[0070] The memory 502 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), a hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 501 may execute the program instructions to implement the shift control method of the embodiment of the present disclosure described above and / or other desired functions. The computer-readable storage medium may also store various contents such as input signals, signal components, noise components, etc.

[0071] In one example, the electronic device 500 may further include an input device 503 and an output device 504 , and these components are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0072] In addition, the input device 503 may also include, for example, a keyboard, a mouse, and the like.

[0073] The output device 504 can output various information to the outside, including determined distance information, direction information, etc. The output device 504 can include, for example, a display, a speaker, a printer, a communication network and its connected remote output device, etc.

[0074] Of course, to simplify, Figure 5 Only some of the components related to the present disclosure in the electronic device 500 are shown, and components such as buses, input / output interfaces, etc. are omitted. In addition, the electronic device 500 may further include any other appropriate components according to specific application scenarios.

[0075] In addition to the above-mentioned method and apparatus, the embodiments of the present disclosure may also be a computer program product, which includes computer program instructions. When the computer program instructions are executed by a processor, the processor executes the shift control method provided by the embodiments of the present disclosure.

[0076] The computer program product may be written in any combination of one or more programming languages to implement the operations of the disclosed embodiments, including object-oriented programming languages such as Java, C++, and conventional procedural programming languages such as C or similar programming languages. The program code may be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0077] In addition, the embodiment of the present disclosure may also be a computer-readable storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, the processor executes the shift control method provided by the embodiment of the present disclosure.

[0078] The computer-readable storage medium may be any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0079] An embodiment of the present disclosure may also be a vehicle equipped with the above-mentioned shift control device.

[0080] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0081] The foregoing description is intended only to provide specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments described herein, but rather to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A shift control method, characterized in that: include: When the exhaust brake unit of the target vehicle is in an activated state, determining whether the associated operating condition information of the target vehicle meets the shift control condition; wherein the associated operating condition information is operating condition information having an associated relationship with the exhaust brake unit; If the associated operating condition information satisfies the shift control condition, determining a clutch pressure value of the target vehicle according to the engine speed of the target vehicle; Gear shifting is controlled on the target vehicle according to the clutch pressure value.

2. The method according to claim 1, characterized in that The associated working condition information includes user operation information and vehicle operation information, and the shift control condition includes a first shift control condition in the user operation dimension and a second shift control condition in the vehicle operation dimension. The associated operating condition information satisfies the shift control condition, including: The user operation information satisfies the first shift control condition, and the vehicle operation information satisfies the second shift control condition.

3. The method according to claim 2, characterized in that The user operation information includes an accelerator pedal opening and / or a driving mode. The user operation information satisfies the first shift control condition, including: The accelerator pedal opening is not greater than a preset opening threshold; and / or the driving mode does not belong to a preset terrain mode; wherein the preset terrain mode includes at least one of a multi-drive mode, a sand mode, and an off-road mode.

4. The method according to claim 2, characterized in that The vehicle operation information includes a target gear value and / or the engine speed, and the vehicle operation information satisfies the second shift control, including: The target gear value is not less than a preset gear value; and / or the exhaust brake torque determined according to the engine speed is not greater than a preset torque threshold.

5. The method according to claim 1, wherein Determining the clutch pressure value of the target vehicle according to the engine speed of the target vehicle includes: Determining an input torque based on an exhaust brake torque; wherein the exhaust brake torque is determined according to the engine speed; The input torque is input to a pressure calculation unit of the target vehicle, so that the pressure calculation unit determines the clutch pressure value according to the input torque.

6. The method according to claim 5, characterized in that The determining of the input torque based on the exhaust brake torque includes: Determining a calculated torque corresponding to the current moment according to the current moment and a torque change function; wherein the torque change function is determined according to an initial moment when the shift control condition is satisfied, a negative maximum torque, and a preset function parameter value; If the calculated torque is not greater than the exhaust brake torque, determining the calculated torque as the input torque; If the calculated torque is greater than the exhaust brake torque, the exhaust brake torque is determined as the input torque.

7. The method according to claim 4 or 5, characterized in that The method further comprises: The exhaust brake torque is determined according to the engine speed and a pre-calibrated speed-torque model; wherein the speed-torque model is determined by adjusting a pedal characteristic model corresponding to the target vehicle according to torque feedback information from the driver.

8. A gear shift control device, characterized in that: include: a judgment module, configured to judge whether the associated operating condition information of the target vehicle satisfies the shift control condition when the exhaust brake unit of the target vehicle is in an activated state; wherein the associated operating condition information is operating condition information having an associated relationship with the exhaust brake unit; a first determining module, configured to determine a clutch pressure value of the target vehicle according to an engine speed of the target vehicle if the associated operating condition information satisfies the shift control condition; A gear shifting module is used to control the gear shifting of the target vehicle according to the clutch pressure value.

9. An electronic device, characterized in that: The electronic device comprises: processor; a memory for storing instructions executable by the processor; The processor is configured to read the executable instructions from the memory and execute the instructions to implement the gear shift control method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The storage medium stores a computer program, and the computer program is used to execute the shift control method according to any one of claims 1 to 7.

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