A shift self-learning method and system based on angle mean

Abstract

The application discloses a kind of based on angle mean gear shift self-learning method and system, belong to automobile gear technology field, including: gear shift control unit accepts instruction and starts self-learning switching to P gear, and initial angle value is recorded by angle sensor.By low pressure drive control gear shift actuator to rotate to jammed position left and right in gear shift control unit, and corresponding angle value is recorded by angle sensor.Gear shift control unit is based on left and right rotation to jammed position angle value mean and initial angle value, target gear shift angle value is quickly calculated and stored, and P gear initial gear shift angle self-learning is completed;As above step is switched to R / N / D / S gear in turn and completes self-learning, after completion, exit self-learning process;The method is based on angle mean joint EOL equipment, and gear reasonable target position can be quickly determined, improves vehicle initial gear shift self-learning efficiency, reduces self-learning time length 20s or more, and uses low pressure drive self-learning method, avoid because driving force is too large, or driving time is too long, lead to drive excessive, jump gear phenomenon occurs and leads to self-learning failure, significantly improve vehicle self-learning pass rate, avoid affecting production rhythm.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile gear position, and particularly relates to a gear shifting self-learning method and system based on angle mean. BACKGROUND

[0002] With the rapid development of the automobile field, it is particularly important to accurately calibrate the gear position of a gearbox and ensure the accuracy of the gear position during the use of a vehicle.

[0003] The current vehicle gear shifting system self-learning is complex and time-consuming. The gear shifting position self-learning is mainly performed by reciprocating rotation of the gear position of the gear shifting mechanism, gradual rotation to the bottom of the gear slot, low learning efficiency, long learning time, and prone to self-learning failure, thereby affecting the vehicle self-learning pass rate and production rhythm. SUMMARY

[0004] In view of the above problems in the prior art, the application provides a gear shifting self-learning method and system based on angle mean. The method is based on angle mean combined with an EOL device, can quickly determine a reasonable target position of the gear position, improves the initial gear shifting self-learning efficiency of the vehicle, reduces the self-learning time by more than 20s, and adopts a low-voltage driven self-learning method. The self-learning method avoids the occurrence of gear skipping phenomenon due to excessive driving force or excessive driving time, thereby avoiding self-learning failure, significantly improving the vehicle self-learning pass rate, and avoiding affecting the production rhythm.

[0005] The application is implemented by the following technical solutions:

[0006] A gear shifting self-learning method based on angle mean, specifically comprising the following steps:

[0007] Step 1: The vehicle is powered on, the gear shifting control system is initialized, the current gear position information is recognized by an angle sensor and sent to a gear shifting control unit, and the vehicle EOL device recognizes whether there is a fault code in the current gear shifting control system. If there is no fault code, an initial gear shifting self-learning instruction is sent to the gear shifting control unit through a CAN line;

[0008] Step 2: After the gear shifting control unit receives the initial gear shifting self-learning instruction of the EOL, the initial gear shifting self-learning is started, the gear shifting actuator is controlled to switch to the P gear position based on the current gear position by controlling the output current, and the initial angle value of the position after switching is recorded by the angle sensor;

[0009] Step 3: The gear shifting control unit controls the gear shifting actuator to rotate to continue adjusting the gear position by low-voltage driving, the gear shifting actuator drives the gearbox shifting shaft to rotate to the left to a stop at the current low-voltage driving force sticking position, and the angle value of the corresponding left rotation sticking position is recorded by the angle sensor;

[0010] Step four, the shift control unit adopts low pressure driving to control the shift actuator to continue adjusting the gear position by rotating to the right, the shift actuator drives the transmission shift shaft to rotate to the right to the current low pressure driving force sticking position to stop, and the corresponding right rotation sticking position angle value is recorded by the angle sensor;

[0011] Step five, based on the angle values of the left and right rotation of the shift actuator to the sticking position by low pressure driving, the average angle value of the current gear is calculated, the calculation formula is (a+β) / 2, and then the shift angle value of the current gear is calculated according to the initial switching angle value θ, the calculation formula is [θ+(a+β) / 2], the target shift angle value is generated and stored in the shift control unit, and the initial shift angle self-learning of the P gear is completed;

[0012] Step six, the shift control unit controls the shift actuator to switch to R / N / D / S gears in turn, and steps two to five are repeated, based on the angle values of the left and right rotation of the shift actuator to the sticking position by low pressure driving, the average angle value of the current gear is calculated, and then the most reasonable shift angle value of the current gear is calculated according to the initial switching angle value, the target shift angle value of R / N / D / S gears is generated and stored in the shift control unit, and the initial shift self-learning of R / N / D / S gears is completed;

[0013] Step seven, the shift control unit completes the storage and learning of the target positions of P / R / N / D / S gears, feeds back the initial shift self-learning success code to the vehicle EOL device through the CAN line, and exits the initial shift self-learning process; after receiving the initial shift self-learning success result, the vehicle EOL device displays that the shift system self-learning is passed on the interface.

[0014] Further, in step one, the vehicle is powered on for initialization self-checking, which specifically includes the following contents:

[0015] The shift control unit identifies the gear position of the current shift actuator through the angle sensor, and completes self system fault detection, including working voltage, signal voltage, sensor power supply voltage, sensor signal voltage, motor drive open circuit, motor drive short circuit and whether there is a fault in the related controller signal; if there is a related fault, send the fault code to the EOL device, prompt to check the electronic shift system, at this time, the shift self-learning cannot be performed, and the shift system fault needs to be checked and handled first.

[0016] Further, in step two, the angle sensor converts the angle analog signal into a digital signal through an analog-to-digital converter and sends it to the shift control unit MCU for angle value judgment; the shift control unit controls the shift actuator to switch gears based on the supplier factory angle value through current control.

[0017] Further, in steps three and four, the shift control unit adopts a fixed 5V low voltage to drive the shift actuator to rotate the gear position, so as to avoid excessive driving due to excessive driving force or driving time, so as to avoid gear skipping and finally cause self-learning failure and affect the production rhythm of the vehicle.

[0018] Further, in step five, the angle value of the initial gear switching position is taken as a reference zero point; the angle value of the shift actuator rotating to the left to the stuck position is taken as a positive angle value, and the angle value of the shift actuator rotating to the left to the stuck position is taken as a negative angle value; the angle value derived from the left and right angle average is the final reasonable angle position based on the initial angle, that is, the target gear position.

[0019] Further, in step seven, the shift control unit feeds back the result after completing the self-learning of the shift system, and completes the closed loop of the self-learning process; if the learning is unsuccessful, the self-learning failure is fed back and displayed on the EOL device.

[0020] On the other hand, the present application also provides a shift self-learning system based on angle average, which is used to realize the above method, comprising:

[0021] The EOL device of the whole vehicle is used to send an initial shift self-learning instruction to the shift control system through a CAN line;

[0022] The shift control system is used to receive the initial shift self-learning instruction of the EOL device of the whole vehicle, and control the shift actuator to perform the shift operation;

[0023] The shift actuator is used to receive the instruction of the shift control system and perform the shift operation.

[0024] Further, the shift control system comprises a communication module, an MCU, a drive control module, a digital-analog converter and a clock monitoring module; the communication module is used to receive the initial shift self-learning instruction of the EOL device of the whole vehicle and send it to the MCU, the MCU sends a shift instruction to the drive control module, the drive control module is used to drive the shift actuator to perform the shift operation; the analog-digital converter is used to convert the angle analog signal sent by the angle sensor of the shift actuator into a digital signal and send it to the MCU for angle value judgment; the clock monitoring module is used to generate the internal clock of the shift control unit and monitor the external EOL input clock; the frequency of the external input clock is detected to see whether it meets the requirements, when the external input clock meets the requirements, the external input clock is taken as the reference clock for the operation of the shift control unit, otherwise, the internal clock of the shift control unit is switched, and the clock fault condition is recorded.

[0025] Compared with the prior art, the present application has the following advantages:

[0026] 1. The shift self-learning method based on the average of the gear clamping position can quickly determine the reasonable target position of the gear, improve the self-learning efficiency, and save the production line self-learning time.

[0027] 2. Compared with the repeated rotation of the position, the self-learning method gradually switches to the bottom of the gear slot. The low-voltage driven self-learning method based on the average can reduce the self-learning failure, improve the vehicle self-learning pass rate, and avoid affecting the production rhythm.

[0028] 3. The present application combines the whole vehicle EOL equipment to illustrate the specific process, implementation steps and detection method of the shift self-learning. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0030] Figure 1 A flowchart of a shift self-learning method based on angle average is provided for the present application;

[0031] Figure 2 A structural block diagram of a shift self-learning system based on angle average is provided for the present application;

[0032] Figure 3 A schematic diagram of the working principle of the shift control unit is provided;

[0033] Figure 4 A schematic diagram of the shift actuator rotation is provided;

[0034] Figure 5 A schematic diagram of the shift control unit for shift angle processing is provided;

[0035] Figure 6 A schematic diagram of the shift system fault self-detection process is provided;

[0036] Figure 7 A schematic diagram of the shift system self-learning process is provided. DETAILED DESCRIPTION

[0037] In order to clearly and completely describe the technical solutions and specific working processes of the present application, in combination with the drawings of the specification, the specific embodiments of the present application are as follows:

[0038] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements or interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0040] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0041] Embodiment 1

[0042] As Figure 1 The flowchart of the shift self-learning method based on the average angle of the present embodiment is shown. The method is that the shift control unit starts self-learning switching to P gear according to the instruction, and records the initial angle value through the angle sensor. The shift control unit controls the shift actuator to rotate to the jamming position through low voltage driving, and records the corresponding angle value through the angle sensor. The shift control unit calculates and stores the target shift angle value based on the average value of the left and right rotation to the jamming position angle value and the initial angle value, completes the P gear initial shift angle self-learning; Switch to R / N / D / S gear in turn according to the above steps to complete self-learning, and exit the self-learning process after completion;

[0043] Specifically includes the following steps:

[0044] Step 1: Power on the vehicle and initialize the shift control system, such as... Figure 2 As shown, the current gear information is identified by the angle sensor and sent to the shift control unit; the vehicle's EOL equipment identifies whether there is a fault code in the current shift control system. If there is no fault code, it sends an initial shift self-learning command to the shift control unit via the CAN line.

[0045] Step Two: After receiving the initial shift self-learning command from EOL, the gear control unit begins the initial shift self-learning process. It controls the shift actuator to switch to P gear based on the current gear by controlling the output current. Figure 3 As shown, the initial angle value of the position after switching is recorded by an angle sensor;

[0046] Step 3: As Figure 3 As shown, the shift control unit uses low-voltage drive to control the shift actuator to rotate in order to continue adjusting the gear position; as Figure 4 As shown, the shift actuator drives the transmission shift shaft to rotate to the left until it stops at the current low-pressure drive force jamming position, and records the corresponding left-turn jamming position angle value through the angle sensor;

[0047] Step 4, as follows Figure 3 As shown, the shift control unit uses low-voltage drive to control the shift actuator to rotate to the right to continue adjusting the gear position, as... Figure 4 As shown, the shift actuator drives the transmission shift shaft to rotate to the right until it stops at the current low-pressure drive force jamming position, and records the corresponding right-turn jamming position angle value through the angle sensor;

[0048] Step 5, as follows Figure 5 As shown, based on the angle values ​​of the left and right rotations of the low-pressure driven shift actuator to the stuck position, the calculation formula is (α+β) / 2; then, according to the initial switching angle value θ, the shift angle value of the current gear is calculated, and the calculation formula is [θ+(α+β) / 2]. The target shift angle value is generated and stored in the shift control unit, completing the self-learning of the initial shift angle of the P gear. This learning process does not require back-and-forth rotation to find the bottom position of the gear slot. The reasonable position can be quickly determined by the mean value method, reducing the self-learning process time by more than 20 seconds and effectively reducing the probability of self-learning failure, thus avoiding affecting the production line cycle time.

[0049] Step six, the shift control unit controls the shift actuator to switch to R / N / D / S gear in turn, and repeats steps two to five, calculates the average angle value of the current gear based on the angle value of the left and right rotation of the shift actuator to the stuck position under low-voltage driving, and then calculates the most reasonable shift angle value of the current gear based on the initial shift angle value, generates the target shift angle value of R / N / D / S gear and stores it in the shift control unit, and completes the initial shift self-learning of R / N / D / S gear;

[0050] Step seven, the shift control unit completes the storage and learning of the target position of each gear P / R / N / D / S, feeds back the initial shift self-learning success code to the vehicle EOL device through the CAN line, and exits the initial shift self-learning process; after receiving the initial shift self-learning success result, the vehicle EOL device displays that the shift system self-learning is successful on the interface.

[0051] In step one, Figure 6 The vehicle is powered on for initialization and self-checking. The shift control unit identifies the gear position of the current shift actuator through the angle sensor and completes self-system fault detection, including working voltage, signal voltage, sensor power supply voltage, sensor signal voltage, motor drive open circuit, motor drive short circuit, and whether the related controller signal is lost. If there is a related fault, send a fault code to the EOL device to prompt to check the electronic shift system. At this time, the shift self-learning cannot be performed, and the shift system fault needs to be checked and handled first.

[0052] In step two, the angle sensor converts the angle analog signal into a digital signal through an analog-to-digital converter and sends it to the shift control unit MCU for angle value judgment. The shift control unit controls the shift actuator to switch gears based on the supplier's factory angle value through current control.

[0053] In steps three and four, the shift control unit uses fixed 5V low-voltage driving to control the rotation of the shift actuator to the whole gear position, avoiding excessive driving due to excessive driving force or excessive driving time, which may cause the gear to jump out of the current gear and ultimately result in self-learning failure, affecting the vehicle production rhythm.

[0054] In step five, the angle value of the initial position of the gear switch is taken as the reference zero point. The angle value of the left rotation of the shift actuator to the stuck position is taken as the positive angle value, and the angle value of the left rotation of the shift actuator to the stuck position is taken as the negative angle value. The angle value derived from the average angle value of the left and right is the final reasonable angle based on the initial angle position, i.e. the target gear position.

[0055] In step seven, after the shift control unit completes the shift system self-learning, it Figure 7 feeds back the result and completes the self-learning process closed loop. If the learning is unsuccessful, feedback the self-learning failure and display it on the EOL device.

[0056] Example 2

[0057] like Figure 2 As shown, this embodiment provides a shift self-learning system based on the average angle, used to implement the method described in Embodiment 1, including:

[0058] The vehicle's EOL (Electronic Shift Online) device is used to send initial shift self-learning commands to the shift control system via the CAN bus.

[0059] The shift control system is used to receive the initial shift self-learning command from the vehicle's EOL equipment and control the shift actuator to perform shift operations;

[0060] A shift actuator is used to receive commands from the shift control system and perform shift operations.

[0061] The shift control system includes a communication module, an MCU, a drive control module, a digital-to-analog converter (DAC), and a clock monitoring module. The communication module receives the initial shift self-learning command from the vehicle's EOL (End-of-Life) device and sends it to the MCU. The MCU then sends a shift command to the drive control module, which drives the shift actuator to perform the shift operation. The DAC converts the analog angle signal from the shift actuator's angle sensor into a digital signal and sends it to the MCU for angle value determination. The clock monitoring module generates an internal clock for the shift control unit and monitors the external EOL input clock. It checks if the frequency of the external input clock meets the requirements. If the external input clock meets the requirements, it uses the external input clock as the reference clock for the shift control unit's operation; otherwise, it switches to the internal clock of the shift control unit and records clock faults.

[0062] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0063] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0064] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A shift self-learning method based on angle mean, characterized in that, Specifically includes the following steps: Step one: the whole vehicle is powered on, the shift control system is initialized, the current gear information is recognized through the angle sensor and sent to the shift control unit, and the whole vehicle EOL device recognizes whether there is a fault code in the current shift control system, if there is no fault code, the initial shift self-learning instruction is sent to the shift control unit through the CAN line; Step two: after receiving the initial shift self-learning instruction of the EOL, the shift control unit starts the initial shift self-learning, controls the output current to control the shift actuator to switch to P gear based on the current gear, and records the initial angle value of the position after switching through the angle sensor; Step three: the shift control unit uses low-voltage drive to control the shift actuator to continue to adjust the gear position; the shift actuator drives the transmission shift shaft to rotate to the left to the current low-voltage driving force sticking position and stops, and the corresponding left turning sticking position angle value is recorded through the angle sensor; Step four: the shift control unit uses low-voltage drive to control the shift actuator to continue to adjust the gear position, and the shift actuator drives the transmission shift shaft to rotate to the right to the current low-voltage driving force sticking position and stops, and the corresponding right turning sticking position angle value is recorded through the angle sensor; Step five: based on the angle values of the left and right turning of the shift actuator to the sticking position by low-voltage drive, the average angle value of the current gear is calculated, and the calculation formula is (a+β) / 2; Then, based on the initial switching angle value θ, the shift angle value of the current gear is calculated, and the calculation formula is [θ+(a+β) / 2], the target shift angle value is generated and stored in the shift control unit, and the P gear initial shift angle self-learning is completed; Step six: the shift control unit controls the shift actuator to switch to R / N / D / S gear in turn, and repeats steps two to five, based on the angle values of the left and right turning of the shift actuator to the sticking position by low-voltage drive, the average angle value of the current gear is calculated, and then based on the initial switching angle value, the most reasonable shift angle value of the current gear is calculated, the target shift angle value of R / N / D / S gear is generated and stored in the shift control unit, and the initial shift self-learning of R / N / D / S gear is completed; Step seven: the shift control unit completes the storage and learning of the target position of P / R / N / D / S gears, feeds back the initial shift self-learning success code to the whole vehicle EOL device through the CAN line, and exits the initial shift self-learning process; After receiving the initial shift self-learning success result, the whole vehicle EOL device displays the shift system self-learning passing on the interface.

2. The shift self-learning method based on average angle value according to claim 1, characterized in that, In step one, the whole vehicle is powered on and initialized for self-checking, which specifically includes the following contents: The shift control unit recognizes the gear position of the shift actuator through the angle sensor and completes the system fault detection, including working voltage, signal voltage, sensor power supply voltage, sensor signal voltage, motor drive open circuit, motor drive short circuit and whether there is a fault in the related controller signal; if there is a related fault, send the fault code to the EOL device and prompt to check the electronic shift system, at this time, the shift self-learning cannot be performed, and the shift system fault needs to be checked and handled first.

3. The shift self-learning method based on average angle value according to claim 1, characterized in that, In step two, the angle sensor converts the angle analog signal into a digital signal through an analog-to-digital converter and sends it to the shift control unit MCU for angle value judgment; the shift control unit switches the gear position through current control of the shift actuator based on the factory angle value of the supplier.

4. The shift self-learning method based on average angle value according to claim 1, characterized in that, In steps three and four, the shift control unit uses a fixed 5V low-voltage drive to control the shift actuator to rotate the gear position.

5. The shift self-learning method based on average angle value according to claim 1, characterized in that, In step five, the angle value of the initial position of the gear switch is taken as the reference zero point; the angle value of the shift actuator rotating to the left to the stuck position is taken as the positive angle value, and the angle value of the shift actuator rotating to the left to the stuck position is taken as the negative angle value; the angle value derived from the left and right angle values is the final reasonable angle based on the initial angle position, i.e. the target gear position.

6. The shift self-learning method based on average angle value according to claim 1, characterized in that, In step seven, after the shift control unit completes the self-learning of the shift system, it feeds back the results and completes the self-learning process closed loop; if the learning is unsuccessful, it feeds back the self-learning failure and displays it on the EOL device.

7. A shift self-learning system based on angle mean for implementing the method according to any one of claims 1 to 6, characterized in that, It comprises: The whole vehicle EOL device is used to send the initial shift self-learning instruction to the shift control system through the CAN line. The shift control system is used to receive the initial shift self-learning instruction of the whole vehicle EOL device and control the shift actuator to perform the shift operation. The shift actuator is used to receive the instruction of the shift control system and perform the shift operation.

8. The angle mean based shift self-learning system of claim 7, wherein, The shift control system comprises a communication module, an MCU, a drive control module, a digital-to-analog converter and a clock monitoring module; the communication module is used to receive the initial shift self-learning instruction of the whole vehicle EOL device and send it to the MCU, the MCU sends the shift instruction to the drive control module, the drive control module is used to drive the shift actuator to perform the shift operation; the analog-to-digital converter is used to convert the angle analog signal sent by the angle sensor of the shift actuator into a digital signal and send it to the MCU for angle value judgment; the clock monitoring module is used to generate the internal clock of the shift control unit and monitor the external EOL input clock; detect whether the frequency of the external input clock meets the requirements, when the external input clock meets the requirements, take the external input clock as the reference clock for the operation of the shift control unit, otherwise switch to the internal clock of the shift control unit, and record the clock fault condition.

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