Hydraulic gear shift control method, device, equipment and storage medium

Abstract

The present application belongs to the gearbox control technical field, disclose a kind of hydraulic gear switching control method, device, equipment and storage medium.The present application obtains the working condition of vehicle-mounted air conditioner and the oil temperature of gearbox by detecting when needing to carry out gear switching;According to the working condition of vehicle-mounted air conditioner and the oil temperature of gearbox, determine target speed, and adjust the speed of engine based on the target speed;After the speed of engine reaches the target speed and completes gear switching, the output of gearbox oil pump is controlled based on target pressure, the speed of engine is adjusted by the above-mentioned mode in combination with the working condition of vehicle-mounted air conditioner and the oil temperature of gearbox, can guarantee the reserve of oil pressure, and after completing gear switching, impact caused by gear shifting can also be avoided by target pressure.

Description

Technical Field

[0001] This invention relates to the field of gearbox control technology, and in particular to a hydraulic gear shifting control method, device, equipment, and storage medium. Background Technology

[0002] When a continuously variable transmission (CVT) shifts from P to R, the shift is achieved by opening the R clutch oil circuit and building up pressure. When the vehicle is idling in P, the following process occurs when shifting from P to R: 1. The gear clutch oil circuit suddenly opens, causing the PL oil pressure to drop; 2. The system oil pressure recovers; 3. The gear clutch pressure suddenly increases, ultimately causing a shock. To address this situation, the current method is based on past experience and sets the engine speed according to whether the air conditioning is on. However, this method cannot effectively deal with the insufficient oil pressure caused by shifting and the shock caused by the subsequent sudden pressure.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a hydraulic gear shifting control method, device, equipment, and storage medium, aiming to solve the technical problem that the existing methods cannot effectively address the insufficient oil pressure caused by gear shifting and the impact caused by subsequent sudden pressure.

[0005] To achieve the above objectives, the present invention provides a hydraulic gear shifting control method, which includes the following steps:

[0006] When a gear shift is detected, the operating status of the vehicle's air conditioner and the transmission oil temperature are obtained.

[0007] The target speed is determined based on the operating status of the vehicle air conditioner and the oil temperature of the transmission, and the engine speed is adjusted based on the target speed.

[0008] After the engine reaches the target speed and the gear shift is completed, the output of the transmission oil pump is controlled based on the target pressure.

[0009] Optionally, the hydraulic gear switching control method further includes:

[0010] Detect the current gear and the current pedal status of the brake pedal;

[0011] When the current gear is in a preset gear and the current pedal state is a preset state, it is determined that a gear shift is required.

[0012] Optionally, determining the target speed based on the operating status of the vehicle air conditioner and the oil temperature of the transmission includes:

[0013] The first rotation speed is determined based on the operating status of the vehicle air conditioner;

[0014] The second speed is determined based on the oil temperature of the transmission;

[0015] The target rotational speed is determined based on the first rotational speed and the second rotational speed.

[0016] Optionally, adjusting the engine speed based on the target speed includes:

[0017] The speed increase is determined based on the target speed.

[0018] The speed rise time corresponding to the speed rise amount is determined based on the correspondence between the speed rise amount and the speed rise time.

[0019] The engine speed is adjusted based on the target speed and the speed rise time.

[0020] Optionally, before determining the speed rise time corresponding to the speed rise based on the correspondence between the speed rise amount and the speed rise time, the method further includes:

[0021] A graph showing the change in noise level over time was constructed based on the relationship between rotational speed and time.

[0022] The lower limit of noise change time and the upper limit of noise change amount are determined based on the set scoring area in the noise change amount and noise change time graph.

[0023] Based on the lower limit of noise change time and the upper limit of noise change amount, and combining the relationship between speed and time change and the relationship between noise change amount and time change, the lower limit of engine speed change time and the upper limit of engine speed change amount are obtained;

[0024] The correspondence between brake pedal depressing and gear shifting time is determined based on the driver's historical driving behavior, and the upper limit of the speed time increase is determined based on the correspondence between brake pedal depressing and gear shifting time.

[0025] Based on the lower limit of the change time, the upper limit of the engine speed change, and the upper limit of the speed time increase, a correspondence between the speed increase and the speed increase time is constructed.

[0026] Optionally, the hydraulic gear switching control method further includes:

[0027] After the current gear is switched from a preset gear to another gear, record the duration for which the current gear remains in the other gear.

[0028] When the duration reaches the preset duration, the gear shift is determined to be complete.

[0029] Optionally, before controlling the output of the transmission oil pump based on the target pressure, the following further step is included:

[0030] Obtain the current pressure drop in the engine oil circuit after gear shifting;

[0031] The target pressure is determined based on the current pressure drop in the engine oil circuit, using a preset scoring curve.

[0032] Furthermore, to achieve the above objectives, the present invention also proposes a hydraulic gear shifting control device, the hydraulic gear shifting control device comprising:

[0033] The acquisition module is used to acquire the operating status of the vehicle air conditioner and the oil temperature of the transmission when a gear shift is detected.

[0034] The control module is used to determine the target speed based on the operating status of the vehicle air conditioner and the oil temperature of the transmission, and to adjust the engine speed based on the target speed;

[0035] The control module is also used to control the output of the transmission oil pump based on the target pressure after the engine speed reaches the target speed and the gear shift is completed.

[0036] Furthermore, to achieve the above objectives, the present invention also proposes a hydraulic gear shifting control device, which includes: a memory, a processor, and a hydraulic gear shifting control program stored in the memory and executable on the processor. The hydraulic gear shifting control program is configured to implement the steps of the hydraulic gear shifting control method described above.

[0037] Furthermore, to achieve the above objectives, the present invention also proposes a storage medium storing a hydraulic gear shifting control program, wherein when the hydraulic gear shifting control program is executed by a processor, it implements the steps of the hydraulic gear shifting control method described above.

[0038] This invention obtains the operating status of the vehicle's air conditioner and the transmission oil temperature when a gear shift is detected; determines a target engine speed based on the operating status of the vehicle's air conditioner and the transmission oil temperature, and adjusts the engine speed based on the target engine speed; after the engine speed reaches the target speed and the gear shift is completed, controls the output of the transmission oil pump based on the target pressure. By adjusting the engine speed in this way, combined with the operating status of the vehicle's air conditioner and the transmission oil temperature, oil pressure reserves can be guaranteed. At the same time, after the gear shift is completed, the target pressure can also avoid the shock caused by shifting. Attached Figure Description

[0039] Figure 1This is a schematic diagram of the structure of the hydraulic gear switching control device in the hardware operating environment involved in the embodiments of the present invention;

[0040] Figure 2 This is a flowchart illustrating the first embodiment of the hydraulic gear switching control method of the present invention;

[0041] Figure 3 This is a flowchart illustrating the second embodiment of the hydraulic gear switching control method of the present invention;

[0042] Figure 4 This is a schematic diagram illustrating the correspondence between the speed increase and the speed increase time in one embodiment of the hydraulic gear switching control method of the present invention.

[0043] Figure 5 This is a schematic diagram showing the correspondence between engine oil circuit pressure, peak vibration acceleration, and vibration duration in one embodiment of the hydraulic gear shifting control method of the present invention.

[0044] Figure 6 This is a structural block diagram of the first embodiment of the hydraulic gear switching control device of the present invention.

[0045] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0047] Reference Figure 1 , Figure 1 This is a schematic diagram of the hydraulic gear switching control device structure in the hardware operating environment involved in the embodiments of the present invention.

[0048] like Figure 1As shown, the hydraulic gear shifting control device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk storage device. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0049] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the hydraulic gear shifting control device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0050] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a hydraulic gear shifting control program.

[0051] exist Figure 1 In the hydraulic gear shifting control device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and memory 1005 in the hydraulic gear shifting control device of the present invention can be set in the hydraulic gear shifting control device, and the hydraulic gear shifting control device calls the hydraulic gear shifting control program stored in the memory 1005 through the processor 1001 and executes the hydraulic gear shifting control method provided in the embodiment of the present invention.

[0052] This invention provides a hydraulic gear switching control method, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of a hydraulic gear switching control method according to the present invention.

[0053] In this embodiment, the hydraulic gear switching control method includes the following steps:

[0054] Step S10: When a gear shift is detected, obtain the operating status of the vehicle air conditioner and the oil temperature of the transmission.

[0055] It should be noted that the execution subject of this embodiment is a hydraulic gear shifting control device, which has functions such as data processing, data communication and program execution. The hydraulic gear shifting control device can be an integrated controller, a control computer or other devices with similar functions. This embodiment does not limit the scope of the invention.

[0056] It should be noted that when a continuously variable transmission (CVT) shifts from P to R, the shift is achieved by opening the R clutch oil circuit and building up pressure. When the vehicle is idling in P, the following process occurs when shifting from P to R: 1. The gear clutch oil circuit suddenly opens, causing the PL oil pressure to drop; 2. The system oil pressure recovers; 3. The gear clutch pressure suddenly increases, ultimately causing a shock. To address this situation, the current system is based on past experience and sets the engine speed according to whether the air conditioning is on. However, this method cannot effectively cope with the insufficient oil pressure caused by shifting and the shock caused by the subsequent sudden pressure.

[0057] To address the aforementioned technical issues, this embodiment obtains the operating status of the vehicle's air conditioner and the transmission oil temperature when a gear shift is detected. A target engine speed is determined based on these two parameters, and the engine speed is adjusted accordingly. After the engine speed reaches the target speed and the gear shift is completed, the output of the transmission oil pump is controlled based on the target pressure. By adjusting the engine speed using the above method, combined with the operating status of the vehicle's air conditioner and the transmission oil temperature, sufficient oil pressure can be maintained. Furthermore, after the gear shift is completed, the target pressure can prevent shocks caused by gear changes.

[0058] In specific implementation, the solution proposed in this embodiment targets the control of the transmission oil pump output pressure and the engine speed during the gear shifting process. Therefore, before executing the control strategy, it is necessary to detect whether gear shifting is required. If gear shifting is not required, no subsequent control operation will be performed. Conversely, if gear shifting is required, this embodiment further obtains the working status of the vehicle air conditioner and the transmission oil temperature.

[0059] In this embodiment, before determining whether a gear shift is needed, a prediction can be made based on the driver's operating behavior and the current gear. Specifically, the current gear is first obtained. If the current gear is a preset gear, the driver's operating behavior, specifically the current state of the brake pedal, is further considered. If the current pedal state meets the preset state, a gear shift is determined. The preset gear can be set to P (Park), meaning that when the current gear is P, the current state of the brake pedal is further determined. The preset state can be set to the depressed state, which in practice means the brake pedal is ON, indicating a gear shift is needed. The above settings are merely illustrative and can be adjusted according to requirements in actual applications. Other methods can be used for gear shift prediction, and this embodiment does not impose any limitations on them.

[0060] Step S20: Determine the target speed based on the operating status of the vehicle air conditioner and the oil temperature of the transmission, and adjust the engine speed based on the target speed.

[0061] In practice, after anticipating the need for gear shifting, this embodiment first adjusts the engine speed to ensure sufficient oil pressure. Furthermore, only after the engine speed is adjusted to the target speed can the output of the transmission oil pump be better controlled at the target pressure. Specifically, in this embodiment, the target speed can be determined first based on the operating status of the vehicle's air conditioner and the transmission oil temperature, and then the engine speed is adjusted based on the target speed.

[0062] Step S30: After the engine speed reaches the target speed and the gear shift is completed, control the output of the transmission oil pump based on the target pressure.

[0063] In specific implementation, after adjusting the engine speed in this embodiment, it is necessary to further determine whether the gear shift has actually been completed in actual situation. If the gear shift has been completed, in order to prevent shock, this embodiment controls the output of the transmission oil pump based on the target pressure.

[0064] In this embodiment, the completion of a gear shift can be determined by the shifted gear and its duration. Specifically, after the current gear shifts from a preset gear to another gear, the duration of the current gear in the other gear is recorded. A successful gear shift is determined when the duration reaches the preset duration. The preset gear can be P (Park). After the current gear shifts from P to another gear, such as R (Reverse), the duration of the current gear remaining in R is recorded. If the duration reaches the preset duration, subsequent output control of the transmission oil pump is initiated. The preset duration can be set according to actual needs; this embodiment does not impose any restrictions on it.

[0065] This embodiment obtains the operating status of the vehicle air conditioner and the transmission oil temperature when a gear shift is detected; determines the target speed based on the operating status of the vehicle air conditioner and the transmission oil temperature, and adjusts the engine speed based on the target speed; after the engine speed reaches the target speed and the gear shift is completed, controls the output of the transmission oil pump based on the target pressure. By adjusting the engine speed in this way, combined with the operating status of the vehicle air conditioner and the transmission oil temperature, oil pressure reserves can be guaranteed. At the same time, after the gear shift is completed, the target pressure can also avoid the shock caused by shifting.

[0066] refer to Figure 3 , Figure 3 This is a flowchart illustrating a second embodiment of a hydraulic gear switching control method according to the present invention.

[0067] Based on the first embodiment described above, in the hydraulic gear switching control method of this embodiment, step S20 specifically includes:

[0068] Step S201: Determine the first rotation speed based on the operating status of the vehicle air conditioner.

[0069] In specific implementation, the working state of the vehicle air conditioner in this embodiment includes on and off states. Based on the different states, the first rotation speed can be determined in this embodiment, as shown in Table 1.

[0070] Table 1

[0071] Operating status of vehicle air conditioner First speed ON 800rpm OFF 750rpm

[0072] Referring to Table 1, when the vehicle air conditioner is in the on state, the corresponding first speed can be 800 rpm, and when the vehicle air conditioner is in the off state, the corresponding first speed can be 750 rpm.

[0073] Step S202: Determine the second speed based on the oil temperature of the transmission.

[0074] In a specific implementation, the second speed can be determined based on the range of the transmission oil temperature, as shown in Table 2.

[0075] Table 2

[0076]

[0077]

[0078] Referring to Table 2, for example, when the transmission oil temperature is between 100 and 120°C, the second speed can be 1000 rpm; and when the transmission oil temperature is between 80 and 100°C, the second speed can be 900 rpm. The speeds set in Tables 1 and 2 are only illustrative examples. In actual situations, adjustments can be made accordingly, and this embodiment does not impose any limitations on this.

[0079] Step S203: Determine the target rotational speed based on the first rotational speed and the second rotational speed.

[0080] In practice, after obtaining the first speed and the second speed, the target speed can be determined based on the first speed and the second speed. Specifically, in this embodiment, the target speed can be the maximum value between the first speed and the second speed.

[0081] Furthermore, after determining the target speed, in this embodiment, when adjusting the engine speed, it is also necessary to adjust it at a certain rate, that is, the speed rise time.

[0082] In a specific implementation, this embodiment can determine the speed increase based on the target speed, then determine the speed increase time corresponding to the speed increase based on the correspondence between the speed increase and the speed increase time, and finally adjust the engine speed according to the speed increase time based on the target speed, as shown in Table 3.

[0083]

[0084] Referring to Table 3, when the speed increase is between 0 and 100 rpm, the corresponding speed increase time can be a(s). Of course, the set range and the corresponding increase time can also be adjusted accordingly, but this embodiment does not impose any restrictions on this.

[0085] Furthermore, the correspondence between the aforementioned increase in engine speed and the time of increase in engine speed needs to be constructed in advance. Specifically, this involves constructing a noise change and noise change time graph based on the relationship between engine speed and time; determining the lower limit of noise change time and the upper limit of noise change amount based on the set scoring area in the noise change and noise change time graph; obtaining the lower limit of engine speed change time and the upper limit of engine speed change amount based on the lower limit of noise change time and the upper limit of noise change amount combined with the relationship between engine speed and time, as well as the relationship between noise change amount and time; determining the correspondence between brake pedal depressing and gear shifting time based on the driver's historical driving behavior; and determining the upper limit of engine speed increase time based on the correspondence between brake pedal depressing and gear shifting time. Finally, a correspondence between the increase in engine speed and the time of increase in engine speed is constructed based on the lower limit of change time, the upper limit of engine speed change amount, and the upper limit of engine speed increase time. The process of constructing this correspondence is as follows: Figure 4As shown, the relationship between engine speed and time is plotted as a noise change / noise change time graph. Region A with a score ≥3 is selected in the graph to obtain the lower limit of noise change time (tnoise-l) and the upper limit of noise change (NoiseU). The lower limit of ENG speed change time (trev-l) and the upper limit of ENG speed change (NE-U) are obtained through the noise / time and engine speed / time relationship. Based on the actual distribution of the customer's braking-shifting time, the mean -3σ is selected to obtain the upper limit of the rise time (trev-u), resulting in an acceptable time / engine speed range B. Region B is divided, and rise times a to f are set every 100 rpm. For example, a score of 5 indicates that all customers recognize the advantage, 4 indicates that even discerning customers recognize the advantage, 3 indicates that the expected goal is achieved and it is acceptable, 2 indicates that ordinary customers cannot accept it, and 1 indicates that all customers cannot accept it.

[0086] Furthermore, in this embodiment, before controlling the output of the transmission oil pump, the current pressure drop of the engine oil circuit after gear shifting can be obtained, and then the target pressure can be determined based on the current pressure drop of the engine oil circuit in combination with a preset scoring curve.

[0087] In practice, different target pressures result in different vibration durations / peak values. By evaluating the vibration / peak value using a 5-point scale (the specific strategy is as described above and will not be repeated here), a score of 3.00 or higher is considered acceptable. The process for determining the target pressure can be as follows: Figure 5 As shown, for example, the actual pressure drop, vibration duration, and peak acceleration of the engine oil circuit are measured in a real vehicle. A point graph of pressure drop-peak acceleration G and vibration duration-peak acceleration G is plotted. According to the scoring criteria, a scoring curve is plotted in the vibration duration-peak acceleration G coordinate system. The actual pressure drop is deduced from the 3.00 score of the scoring curve, and the target pressure is deduced from the curve of actual pressure drop and target pressure.

[0088] This embodiment determines a first speed based on the operating state of the vehicle air conditioner; a second speed based on the oil temperature of the transmission; a target speed based on the first and second speeds; a speed increase based on the target speed; a speed increase time corresponding to the speed increase based on the correspondence between the speed increase and the speed increase time; adjusts the engine speed according to the speed increase time based on the target speed; and finally obtains the current pressure drop of the engine oil circuit after gear shifting. A target pressure is determined based on the current pressure drop of the engine oil circuit using a preset scoring curve. This ensures sufficient oil pressure and avoids shocks caused by gear shifting through the target pressure.

[0089] Furthermore, this embodiment of the invention also proposes a storage medium storing a hydraulic gear shifting control program, which, when executed by a processor, implements the steps of the hydraulic gear shifting control method described above.

[0090] Reference Figure 6 , Figure 6 This is a structural block diagram of the first embodiment of the hydraulic gear switching control device of the present invention.

[0091] like Figure 6 As shown, the hydraulic gear switching control device proposed in this embodiment of the invention includes:

[0092] The acquisition module 10 is used to acquire the operating status of the vehicle air conditioner and the oil temperature of the transmission when a gear shift is detected.

[0093] The control module 20 is used to determine the target speed based on the operating status of the vehicle air conditioner and the oil temperature of the transmission, and to adjust the engine speed based on the target speed.

[0094] The control module 20 is also used to control the output of the transmission oil pump based on the target pressure after the engine speed reaches the target speed and the gear shift is completed.

[0095] This embodiment obtains the operating status of the vehicle air conditioner and the transmission oil temperature when a gear shift is detected; determines the target speed based on the operating status of the vehicle air conditioner and the transmission oil temperature, and adjusts the engine speed based on the target speed; after the engine speed reaches the target speed and the gear shift is completed, controls the output of the transmission oil pump based on the target pressure. By adjusting the engine speed in this way, combined with the operating status of the vehicle air conditioner and the transmission oil temperature, oil pressure reserves can be guaranteed. At the same time, after the gear shift is completed, the target pressure can also avoid the shock caused by shifting.

[0096] In one embodiment, the control module 20 is further configured to detect the current gear and the current pedal state of the brake pedal; when the current gear is in a preset gear and the current pedal state is a preset state, it is determined that a gear shift is required.

[0097] In one embodiment, the control module 20 is further configured to determine a first speed based on the operating state of the vehicle air conditioner; determine a second speed based on the oil temperature of the transmission; and determine a target speed based on the first speed and the second speed.

[0098] In one embodiment, the control module 20 is further configured to determine the speed increase based on the target speed; determine the speed increase time corresponding to the speed increase based on the correspondence between the speed increase and the speed increase time; and adjust the engine speed according to the speed increase time based on the target speed.

[0099] In one embodiment, the control module 20 is further configured to: construct a noise change quantity versus noise change time graph based on the relationship between engine speed and time; determine a lower limit for noise change time and an upper limit for noise change quantity based on a set scoring area in the noise change quantity versus noise change time graph; obtain a lower limit for engine speed change time and an upper limit for engine speed change quantity based on the lower limit for noise change time and the upper limit for noise change quantity, combined with the relationship between engine speed and time and the relationship between noise change quantity and time; determine the correspondence between brake pedal depressing and gear shifting time based on the driver's historical driving behavior, and determine an upper limit for engine speed time increase based on the correspondence between brake pedal depressing and gear shifting time; and construct a correspondence between engine speed increase quantity and engine speed increase time based on the lower limit for change time, the upper limit for engine speed change quantity, and the upper limit for engine speed time increase.

[0100] In one embodiment, the control module 20 is further configured to record the duration of the current gear being in another gear after the current gear is switched from a preset gear to another gear; and determine that the gear switching is completed when the duration reaches the preset duration.

[0101] In one embodiment, the control module 20 is further configured to acquire the current pressure drop of the engine oil circuit after gear shifting; and determine the target pressure based on the current pressure drop of the engine oil circuit in conjunction with a preset scoring curve.

[0102] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solution of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0103] It should be understood that although the steps in the flowcharts of this application's embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least a portion of the sub-steps or stages of other steps.

[0104] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0105] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0106] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0107] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0108] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A hydraulic gear shifting control method, characterized in that, The hydraulic gear switching control method includes: When a gear shift is detected, the operating status of the vehicle's air conditioner and the transmission oil temperature are obtained. The target speed is determined based on the operating status of the vehicle air conditioner and the oil temperature of the transmission, and the engine speed is adjusted based on the target speed. After the engine speed reaches the target speed and the gear shift is completed, the output of the transmission oil pump is controlled based on the target pressure. The adjustment of engine speed based on the target speed includes: The speed increase is determined based on the target speed. A graph showing the change in noise level over time was constructed based on the relationship between rotational speed and time. The lower limit of noise change time and the upper limit of noise change amount are determined based on the set scoring area in the noise change amount and noise change time graph. Based on the lower limit of noise change time and the upper limit of noise change amount, and combining the relationship between speed and time change and the relationship between noise change amount and time change, the lower limit of engine speed change time and the upper limit of engine speed change amount are obtained; The correspondence between brake pedal depressing and gear shifting time is determined based on the driver's historical driving behavior, and the upper limit of the speed time increase is determined based on the correspondence between brake pedal depressing and gear shifting time. Based on the lower limit of engine speed change time, the upper limit of engine speed change amount, and the upper limit of speed time rise, a correspondence between speed rise amount and speed rise time is constructed. The speed rise time corresponding to the speed rise amount is determined based on the correspondence between the speed rise amount and the speed rise time. The engine speed is adjusted based on the target speed and the speed rise time.

2. The hydraulic gear switching control method as described in claim 1, characterized in that, The hydraulic gear switching control method further includes: Detect the current gear and the current pedal status of the brake pedal; When the current gear is in a preset gear and the current pedal state is a preset state, it is determined that a gear shift is required.

3. The hydraulic gear switching control method as described in claim 1, characterized in that, Determining the target speed based on the operating status of the vehicle air conditioner and the oil temperature of the transmission includes: The first rotation speed is determined based on the operating status of the vehicle air conditioner; The second speed is determined based on the oil temperature of the transmission; The target rotational speed is determined based on the first rotational speed and the second rotational speed.

4. The hydraulic gear switching control method as described in claim 1, characterized in that, The hydraulic gear switching control method further includes: After the current gear is switched from a preset gear to another gear, record the duration for which the current gear remains in the other gear. When the duration reaches the preset duration, the gear shift is determined to be complete.

5. The hydraulic gear switching control method as described in claim 1, characterized in that, Before controlling the output of the transmission oil pump based on the target pressure, the following also applies: Obtain the current pressure drop in the engine oil circuit after gear shifting; The target pressure is determined based on the current pressure drop in the engine oil circuit, using a preset scoring curve.

6. A hydraulic gear shifting control device, characterized in that, The hydraulic gear shifting control device includes: The acquisition module is used to acquire the operating status of the vehicle air conditioner and the oil temperature of the transmission when a gear shift is detected. The control module is used to determine the target speed based on the operating status of the vehicle air conditioner and the oil temperature of the transmission, and to adjust the engine speed based on the target speed; The control module is also used to control the output of the transmission oil pump based on the target pressure after the engine speed reaches the target speed and the gear shift is completed; The control module is also used to determine the speed increase based on the target speed; A graph showing the change in noise level over time was constructed based on the relationship between rotational speed and time. The lower limit of noise change time and the upper limit of noise change amount are determined based on the set scoring area in the noise change amount and noise change time graph. Based on the lower limit of noise change time and the upper limit of noise change amount, and combining the relationship between speed and time change and the relationship between noise change amount and time change, the lower limit of engine speed change time and the upper limit of engine speed change amount are obtained; The correspondence between brake pedal depressing and gear shifting time is determined based on the driver's historical driving behavior, and the upper limit of the speed time increase is determined based on the correspondence between brake pedal depressing and gear shifting time. Based on the lower limit of engine speed change time, the upper limit of engine speed change amount, and the upper limit of speed time rise, a correspondence between speed rise amount and speed rise time is constructed. The speed rise time corresponding to the speed rise amount is determined based on the correspondence between the speed rise amount and the speed rise time. The engine speed is adjusted based on the target speed and the speed rise time.

7. A hydraulic gear shifting control device, characterized in that, The device includes: a memory, a processor, and a hydraulic gear shifting control program stored in the memory and executable on the processor, the hydraulic gear shifting control program being configured to implement the steps of the hydraulic gear shifting control method as described in any one of claims 1 to 5.

8. A storage medium, characterized in that, The storage medium stores a hydraulic gear shifting control program, which, when executed by a processor, implements the steps of the hydraulic gear shifting control method as described in any one of claims 1 to 5.

Images