A method and system for controlling shifting of an automatic transmission of an automobile

Abstract

The present invention discloses a shift control method and system for an automatic transmission of an automobile. The method comprises: obtaining driving information, wherein the driving data includes driving comfort data, actual driving data, and driver habit information; determining the driver's state based on the driving comfort data; determining whether the shift time needs to be corrected based on the actual driving data, and correcting the target shift time in combination with the driver's state. The present invention corrects the shift time size under consideration of the accelerator pedal opening and its rate of change by integrating operating condition and driver state information, the distance to the preceding vehicle, and the driver's driving state, so as to provide differentiated automatic transmission shift quality, meet the intelligent and variable driver shifting habits, promptly remind the driver and be perceived, and reduce the driver's driving safety risks caused by driving fatigue. The method is low-cost, has strong versatility and portability, and can achieve accurate correction effects through reasonable and simplified judgments.

Description

Technical Field

[0001] The present invention relates to the field of automatic control technology, and in particular to a method and system for controlling the shifting of an automatic transmission of an automobile. Background Art

[0002] To improve motor efficiency and increase range, electric vehicle automatic transmissions are trending toward multi-speed transmissions. Two-speed automatic transmissions, in particular, offer greater explosive power during launch, while the tighter gear ratio of second gear ensures high efficiency and energy reserves, making them highly favored in new energy vehicles. Traditional automatic transmissions, on the other hand, shift gears by controlling the clutch engagement time based on the driver's accelerator pedal position and its rate of change, thereby achieving a balance between shift shock and clutch slippage to meet the driver's driving intent.

[0003] Relying on the accelerator pedal opening and its rate of change to identify the driver's driving intention can better ensure driving safety. However, the vehicle operating conditions and environment are complex, and the driver's driving status varies. It is also crucial to integrate more factors to more intelligently correct the automatic transmission shift quality and provide a variable driving experience. Summary of the Invention

[0004] The present invention is proposed in light of the aforementioned existing problems. It provides a method and system for controlling shifting in an automatic transmission, addressing the current issues of fixed driver shifting habits, a lack of differentiated automatic transmission shifting characteristics and quality, an inability to meet diverse driving experience requirements, and an inability to mitigate driver safety risks caused by driver fatigue.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] In a first aspect, the present invention provides a method for controlling shifting of an automatic transmission of an automobile, comprising:

[0007] Acquiring driving information, wherein the driving data includes driving comfort data, actual driving data, and driver habit information;

[0008] determining a driver's state based on the driving comfort data;

[0009] Whether the shift time needs to be corrected is determined based on the actual driving data and the driver's state, and the corrected target shift time is corrected in combination with the driver's state.

[0010] As a preferred embodiment of the automotive automatic transmission shift control method of the present invention, the driving comfort data includes a seat back pressure signal and a seat cushion temperature signal;

[0011] The driving actual situation data includes the distance from the vehicle ahead and the vehicle's real-time speed;

[0012] The driver's habit information includes the target shift time under different driver intentions.

[0013] As a preferred embodiment of the automatic transmission shift control method for an automobile according to the present invention, wherein: the pressure signal sampling method of the seat backrest is:

[0014] The pressure data p of the seat backrest at sampling time t is the average value of the previous three sampling times:

[0015]

[0016] where p t-1 is the pressure data of the seat backrest at the previous sampling time, p t-2 is the pressure data of the seat backrest at the previous two sampling times, p t-3 is the pressure data of the seat backrest at the previous three sampling times.

[0017] As a preferred embodiment of the automatic transmission shift control method for an automobile according to the present invention, wherein: judging the driver's state based on the driving comfort data includes,

[0018] When the driver is in a comfortable state, p≥p0 or T min <T≤T0;

[0019] When the driver is in a sporty state, p = 0 or T≥T1 or T≤T min ;

[0020] When the driver is in a standard state, 0<p<p0 or T0<T<T1;

[0021] where p is the pressure data of the seat backrest; T is the temperature data of the seat; p0 is the pressure threshold; T0 is the standard temperature threshold, a constant; T1 is the highest temperature threshold, a constant; T min is the lowest temperature threshold, a constant.

[0022] As a preferred embodiment of the automatic transmission shift control method for an automobile according to the present invention, wherein: the pressure threshold needs to be corrected in real time according to the pressure fluctuation frequency:

[0023]

[0024] where p1 is the standard pressure threshold, a constant; p t is the pressure value of the seat backrest at sampling time t; p t-1 is the pressure value of the seat backrest at sampling time t-1.

[0025] As a preferred solution of the automobile automatic transmission shift control method of the present invention, wherein: judging whether the shift time needs to be corrected based on the driver's state of the driving real-time data includes:

[0026] If the distance to the preceding vehicle is less than the safety threshold, the correction controller directly sends the target shift time to the shift controller;

[0027] If the distance to the preceding vehicle is greater than the safety threshold, the target shift time x is intercepted and the target shift time x is modified according to the driver's state. t ;

[0028] The corrected target shift time x t The rules are:

[0029]

[0030] Where α and β are adjustment coefficients and 0.8<β<α<1.

[0031] As a preferred embodiment of the automatic transmission shift control method of the present invention, the preceding vehicle distance safety threshold S0 is related to the vehicle speed V and the target shift time x, and is expressed as:

[0032]

[0033] Among them, a max is the maximum braking deceleration of the vehicle, a constant.

[0034] In a second aspect, the present invention provides a system for controlling a shifting method of an automatic transmission of an automobile, comprising:

[0035] An acquisition module, configured to acquire driving information, wherein the driving data includes driving comfort data, actual driving data, and driver habit information;

[0036] a judgment module, configured to judge a driver's state based on the driving comfort data;

[0037] The correction module is used to determine whether the shift time needs to be corrected based on the actual driving data, and the corrected target shift time is corrected in combination with the driver's state.

[0038] In a third aspect, the present invention provides a computing device, comprising:

[0039] memory and processor;

[0040] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the automobile automatic transmission shift control method are implemented.

[0041] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the automobile automatic transmission shift control method.

[0042] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention integrates working conditions and driver status information, uses radar to detect the distance to the vehicle in front and pressure sensors and the temperature inside the car to detect the driver's driving status, and corrects the shift time size considering the accelerator pedal opening and its change rate, so as to comprehensively improve the shift quality of the automatic transmission, meet the intelligent and variable driver shifting habits and differentiated automatic transmission shifting characteristics and quality, can timely remind the driver and be perceived, and at the same time reduce the driver's driving safety risks caused by driving fatigue and other problems; compared with the existing technology, the automobile automatic transmission shift control method proposed by the present invention has low cost, strong versatility and transplantability, and can achieve accurate correction effects through reasonable and simplified judgments. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0044] Figure 1 This is a schematic diagram of the overall process of a vehicle automatic transmission shift control method according to one embodiment of the present invention;

[0045] Figure 2 The figure is a system diagram of a vehicle automatic transmission shift control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of the specific embodiments of the present invention is given in conjunction with the accompanying drawings. It is obvious that the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in this field without creative work should fall within the scope of protection of the present invention.

[0047] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0048] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0049] The present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0050] Furthermore, in the description of the present invention, it should be noted that the terms "upper, lower, inner, and outer" and other references to orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the systems or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In this disclosure, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, removable, or integral connections. They may also refer to mechanical, electrical, or direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure.

[0052] Example 1

[0053] Reference Figure 1-2 , as one embodiment of the present invention, provides a vehicle automatic transmission shift control method, comprising:

[0054] S1: Acquire driving information, including driving comfort data, driving situation data, and driver habit information;

[0055] Furthermore, the driving comfort data includes the pressure signal of the seat back and the temperature signal of the seat cushion;

[0056] Real-time driving data includes the distance to the preceding vehicle and the real-time speed of the vehicle;

[0057] The driver habit information includes target shift times under different driver intentions.

[0058] It should be noted that the target shift times under different driver intentions are off-line calibrated records. The magnitude of the driver's throttle pedal opening determines the shift time, and the vehicle CAN bus can extract values from a look-up table in real time based on the throttle opening and vehicle speed; or the driver's shifting habits can be obtained from historical data.

[0059] Furthermore, the pressure signal sampling method for the seat backrest is as follows:

[0060] The pressure data p of the seat backrest sampled at time t is the average of the pressure data of the previous three sampling times:

[0061]

[0062] where p t-1 is the pressure data of the seat backrest at the previous sampling time, p t-2 is the pressure data of the seat backrest at the previous two sampling times, p t-3 is the pressure data of the seat backrest at the previous three sampling times. [[ID=二十]]

[0063] S2: Judge the driver's state based on driving comfort data;

[0064] Furthermore, judging the driver's state based on driving comfort data includes

[0065] When the driver is in a comfortable state, p ≥ p0 or T min < T ≤ T0; [[ID=三十]]

[0066] When the driver is in a sporty state, p = 0 or T ≥ T1 or T ≤ T min ;

[0067] When the driver is in a standard state, 0 < p < p0 or T0 < T < T1;

[0068] where p is the pressure data of the seat backrest; T is the temperature data of the seat; p0 is the pressure threshold; T0 is the standard temperature threshold, a constant; T1 is the highest temperature threshold, a constant; T min is the lowest temperature threshold, a constant.

[0069] It should be noted that the comfortable state is judged based on temperature and pressure; when the seat cushion temperature is too high or lower than the lowest temperature comfortable for the human body, or the driver is restless and separated from the backrest (pressure is 0), it is judged that the driver is in an uncomfortable state at this time, that is, a sporty state; when the seat cushion temperature is between the lowest temperature comfortable for the human body and the standard temperature, or the driver is紧靠椅背(施加附加力作用于靠背,压力大于正常靠背状态),判断此时驾驶员处于舒适性状态;当坐垫温度位于标准温度和最高温度之间,或者驾驶员正常靠背(未施加过大的附加力),判断此时驾驶员处于标准状态。 It should be noted that there seems to be some inaccuracies or unclear parts in the original Chinese text, especially in the description in the last sentence about "驾驶员紧靠椅背(施加附加力作用于靠背,压力大于正常靠背状态)" which is not very clear in its expression. The above translation tries to make the best sense of the overall text while maintaining the original meaning as much as possible.

[0070] At the same time, the driving status can be comprehensively evaluated through body pressure and temperature without increasing economic and space costs, using fewer and easily accessible parameters.

[0071] Furthermore, the pressure threshold needs to be modified in real time according to the frequency of pressure fluctuations:

[0072]

[0073] Among them, p1 is the standard pressure threshold, a constant; p t is the seat back pressure value at sampling time t; p t-1 is the seat back pressure value at sampling time t-1.

[0074] S3: Determine whether the shift time needs to be corrected based on the actual driving data, and correct the target shift time based on the driver's status.

[0075] Furthermore, whether the shift time needs to be corrected is determined based on the actual driving data, including:

[0076] If the distance to the preceding vehicle is less than the safety threshold, the correction controller directly sends the target shift time to the shift controller;

[0077] If the distance to the preceding vehicle is greater than the safety threshold, the target shift time x is intercepted and the target shift time x is modified according to the driver's state. t ;

[0078] Corrected target shift time x t The rules are:

[0079]

[0080] Where α and β are adjustment coefficients and 0.8<β<α<1.

[0081] It should be noted that the initial target shift time x is issued by the vehicle controller. Initially, it can be operated according to the traditional shift mode or the driver's shifting habits obtained through historical data, and the parameters of S2 can be used for judgment to select the size of the modified target shift time.

[0082] In addition, T0 is related to offline calibration, corresponding to the status standards of different drivers. The correction rule is to adjust the calibrated shift time of the original vehicle control to achieve controllable and adjustable shift quality of the automatic transmission, which can be adaptively and dynamically adjusted to meet the driving and shifting needs of different drivers.

[0083] Furthermore, the preceding vehicle distance safety threshold S0 is related to the vehicle speed V and the target shift time x, and is expressed as:

[0084]

[0085] Among them, a max is the maximum braking deceleration of the vehicle, a constant.

[0086] The automotive automatic transmission shift control method system in this embodiment includes:

[0087] An acquisition module is used to acquire driving information, including driving comfort data, driving data and driver habit information;

[0088] A judgment module, used to judge the driver's state based on the driving comfort data;

[0089] The correction module is used to determine whether the shift time needs to be corrected based on the actual driving data, and to correct the target shift time in combination with the driver's status.

[0090] Specifically, such as Figure 2 As shown, the acquisition module can be a pressure and temperature sensor to obtain the seat pressure signal and temperature signal; the signal is then sent to the judgment module through the CAN bus. The judgment module, i.e., the vehicle controller, performs correction based on the actual data after the judgment is completed, and then sends the correction result to the shift controller to execute the shift operation.

[0091] This embodiment further provides a computing device suitable for high-precision floating-point number calculation based on a fixed-point CPU, including:

[0092] Memory and processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement the automobile automatic transmission shift control method proposed in the above embodiment.

[0093] This embodiment further provides a storage medium on which a computer program is stored. When the program is executed by a processor, the method for controlling the shifting of an automatic transmission of an automobile as proposed in the above embodiment is implemented.

[0094] The storage medium proposed in this embodiment and the method for implementing automobile automatic transmission shift control proposed in the above embodiment belong to the same inventive concept. Technical details not fully described in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0095] Through the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented with the help of software and necessary general-purpose hardware, and of course it 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 is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a computer's floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various embodiments of the present invention.

[0096] Example 2

[0097] Referring to Table 1, which is an embodiment of the present invention, in order to verify the feasibility and beneficial effects thereof, scores of 12 people in actual applications of the automobile automatic transmission shift control method are provided.

[0098] Table 1 Comparison of subjective data

[0099]

[0100] As can be seen from Table 1, under the present invention, when the driving conditions of different drivers are comprehensively considered and compared with the traditional unchanging driver shifting habits, the automatic transmission shift time is corrected. By providing the driver with a different driving experience, not only is a good, differentiated, and perceptible automatic transmission shift quality achieved, but the driver is actively aware of it, which can effectively ensure driving safety and obtain a better driver's subjective evaluation score.

[0101] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for controlling shifting of an automatic transmission of an automobile, characterized in that: include: Acquiring driving information, wherein the driving information includes driving comfort data, actual driving data, and driver habit information; determining a driver's state based on the driving comfort data; Determining whether to revise the target shift time based on the actual driving data and the driver's state, wherein the revised target shift time is revised in combination with the driver's state, includes: If the distance to the preceding vehicle is less than the safety threshold, the correction controller directly sends the target shift time to the shift controller; If the distance to the vehicle ahead is greater than the safety threshold, the target shift time is intercepted , modify the target shift time according to the driver's state ; The corrected target shift time The rules are: ； in, The pressure data for the seat back; The temperature data of the seat; is the pressure threshold; is the standard temperature threshold, constant; is the maximum temperature threshold, a constant; is the minimum temperature threshold, a constant; is the adjustment coefficient and ; The preceding vehicle distance safety threshold and vehicle speed and target shift time Related, expressed as: ； in, is the maximum braking deceleration of the vehicle, a constant.

2. The automotive automatic transmission shift control method according to claim 1, wherein: The driving comfort data includes a seat back pressure signal and a seat cushion temperature signal; The real-time driving data includes the distance to the preceding vehicle and the real-time speed of the vehicle; The driver habit information includes target shift times under different driver intentions.

3. The automotive automatic transmission shift control method according to claim 2, wherein: The seat back pressure signal sampling method is: The seat back pressure data p at sampling time t is the average value of the previous three sampling times: ； in, is the seat back pressure data of the previous sampling time, is the seat back pressure data of the first two sampling times, The pressure data of the seat back at the first three sampling times.

4. The automotive automatic transmission shift control method according to claim 3, wherein: judging the driver's state according to the driving comfort data, include, When the driver is in a comfortable state, or ; When the driver is in a sporty state, or or ; When the driver is in standard condition, or .

5. The automotive automatic transmission shift control method according to claim 4, wherein: The pressure threshold needs to be modified in real time according to the pressure fluctuation frequency: ； in, is the standard pressure threshold, a constant; is the seat back pressure value at sampling time t; is the seat back pressure value at sampling time t-1.

6. A vehicle automatic transmission shift control system, applied to the method according to claim 1, characterized in that: include, An acquisition module, configured to acquire driving information, wherein the driving information includes driving comfort data, actual driving data, and driver habit information; a judgment module, configured to judge a driver's state based on the driving comfort data; The correction module is used to determine whether the target shift time needs to be corrected based on the actual driving data, and the corrected target shift time is corrected in combination with the driver status.

7. An electronic device comprising: memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the automobile automatic transmission shift control method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions, when executed by a processor, implement the steps of the automobile automatic transmission shift control method according to any one of claims 1 to 5.

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