Gear sensor adaptive calibration control method

Abstract

The application discloses a gear sensor self-adapting calibration control method, comprising the following steps: detecting the function of the gear sensor; if the function of the gear sensor is detected to be abnormal, prompting the electronic gear shifting actuator control unit to perform gear sensor self-adapting calibration; and performing self-adapting calibration on the gear sensor by the electronic gear shifting control unit. The gear sensor self-adapting calibration control method reminds the driver to stop the vehicle and starts self-adapting calibration when the sensor calibration data is abnormal, so that the gear positions are recalibrated, the driver does not need to drive the vehicle to the after-sales site for initialization calibration, and the calibration result is the same as that of the initialization calibration after the self-adapting calibration.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, and more particularly to a gear sensor adaptive calibration control method. BACKGROUND

[0002] The gear sensor inside the electronic gear shifting actuator is initialized and calibrated after it is offline from the supplier's production line. The calibration is mainly for the sensor signal corresponding to each gear position when the gear sensor is matched with the gear shifting mechanism.

[0003] Due to the mechanical matching between the electronic gear shifting actuator and the gearbox and the manufacturing process, there is a certain gap between the shifting shaft of the actuator and the shifting shaft of the gearbox. After the vehicle has traveled a certain distance (30,000 or 50,000 kilometers), the amount of shaking will increase, which may cause the matching accuracy of the gear sensor position to be wrong. The phenomenon is that the gearbox cannot shift even if the vehicle control system functions normally. To avoid the above problem, the existing solution is as follows: find the related parameters when the matching accuracy is wrong through component durability test. If the above problem may occur after 50,000 kilometers of driving, note on the after-sales manual that the initialization calibration should be performed by the after-sales staff after 50,000 kilometers. This solution requires the driver to drive the vehicle to the after-sales site, and the driver cannot operate it himself. It is relatively troublesome to perform, and if the driver has traveled a certain distance but has not gone to the store for initialization calibration, the vehicle will be at risk of shifting failure at any time.

[0004] Therefore, there is an urgent need for a gear sensor adaptive calibration control method. SUMMARY

[0005] The purpose of the present application is to provide a gear sensor adaptive calibration control method to solve the above-mentioned problems in the prior art and to realize the adaptive calibration of the gear sensor.

[0006] The present application provides a gear sensor adaptive calibration control method, which comprises the following steps:

[0007] abnormality detection of the function of the gear sensor;

[0008] If the function of the gear sensor is detected to be abnormal, the electronic gear shifting actuator control unit prompts the adaptive calibration of the gear sensor;

[0009] The electronic gear shifting control unit is used to perform adaptive calibration on the gear sensor.

[0010] The gear sensor adaptive calibration control method described above, wherein preferably, the abnormality detection of the function of the gear sensor comprises the following steps:

[0011] If the shift lever is operated by the driver into a target position, and if the shift execution completion and target gear signal feedback from the electronic shift execution mechanism is not received by the transmission control unit within a preset time threshold, a gear sensor abnormality is recorded and accumulated;

[0012] If the number of gear sensor abnormalities exceeds an abnormality threshold, a functional abnormality of the gear sensor is determined.

[0013] The gear sensor adaptive calibration control method as described above, wherein preferably, the preset time threshold is 300 ms, and the abnormality threshold is 3 times.

[0014] The gear sensor adaptive calibration control method as described above, wherein preferably, in the case of a gear sensor functional detection abnormality, the electronic shift actuator control unit prompts the gear sensor adaptive calibration, specifically including:

[0015] The electronic shift actuator control unit prompts the driver to park in P gear through the instrument panel, and performs the gear sensor adaptive calibration.

[0016] The gear sensor adaptive calibration control method as described above, wherein preferably, the adaptive calibration of the gear sensor by the electronic shift control unit specifically includes:

[0017] The electronic shift actuator control unit sends a self-learning instruction to the gear sensor;

[0018] The electronic shift actuator control unit drives the shift actuator to rotate clockwise until it cannot rotate;

[0019] The electronic shift actuator control unit sends a P gear exit instruction to drive the electronic shift actuator to rotate counterclockwise;

[0020] The first driven force valley point position is recorded as the P gear position;

[0021] The second driven force valley point position is recorded as the R gear position;

[0022] The third driven force valley point position is recorded as the N gear position;

[0023] The fourth driven force valley point position is recorded as the D gear position.

[0024] The gear sensor adaptive calibration control method as described above, wherein preferably, the gear sensor adaptive calibration control method further includes:

[0025] After the gear sensor adaptive calibration is completed, it is determined whether the calibration is successful.

[0026] The gear sensor adaptive calibration control method as described above, wherein preferably, after the gear sensor adaptive calibration is completed, whether the calibration is successful is determined, and specifically includes:

[0027] The electronic gear shifting actuator controller calculates the angle difference between P, R, N and D gears;

[0028] If the angle difference meets the design requirement, the calibration is determined to be successful;

[0029] If the angle difference exceeds the corresponding angle difference design threshold, the calibration is determined to be failed, and needs to be re-performed adaptive calibration;

[0030] If the calibration is still unsuccessful after exceeding the preset calibration times threshold, the gear sensor calibration state is determined to be abnormal, and the driver is prompted to go to the after-sales service store for maintenance.

[0031] The gear sensor adaptive calibration control method as described above, wherein preferably, the gear sensor determination principle in the middle of each gear is:

[0032] In the case of slow operation, the gear sensor can detect the gear signal, if the current gear is P, before the driver operates to enter R, the gear signal is all P; if the current gear is R, before the driver operates to enter N, the gear signal is all R; if the current gear is N, before the driver operates to enter D, the gear signal is all N; if the current gear is D, before the driver operates to enter N, the gear signal is all D; if the current gear is N, before the driver operates to enter R, the gear signal is all N; if the current gear is R, before the driver operates to enter P, the gear signal is all R;

[0033] In the case of fast operation, the gear sensor may have signal loss; if the current gear is P, when the driver quickly operates from P to the middle position of R→N, the sensor may have R signal loss, and the gear signal output is R; when the driver continuously and quickly operates from P to D, the gear signal must output P, R, N, D signals in turn.

[0034] The present application provides a gear sensor adaptive calibration control method, when the sensor calibration data is abnormal, the driver is reminded to stop and start adaptive calibration, and each gear position is recalibrated, the driver does not need to drive the vehicle to the after-sales site for initialization calibration, and the calibration result after adaptive calibration is the same as that of initialization calibration. BRIEF DESCRIPTION OF DRAWINGS

[0035] To make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described below with reference to the drawings, wherein:

[0036] Figure 1 The flow chart of the gear sensor adaptive calibration control method embodiment provided by the present application;

[0037] Figure 2 The timing chart of the gear shifting process of the present application;

[0038] Figure 3 The gear sensor adaptive calibration flow chart;

[0039] Figure 4 The schematic diagram of the intermediate position signal processing strategy of each gear. DETAILED DESCRIPTION

[0040] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative in nature and is in no way intended to limit the disclosure, its application or uses. The present disclosure can be implemented in numerous different forms, not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the relative arrangement of the components and steps set forth in these embodiments, the components of the materials, numerical expressions, and numerical values, unless otherwise specifically stated, should be interpreted as merely illustrative, and not as a limitation.

[0041] The "first", "second", and similar words used in the present disclosure do not represent any order, number or importance, but are only used to distinguish different parts. "Include" or "contain" and similar words mean that the elements before the word cover the elements listed after the word, and do not exclude the possibility of also covering other elements. "Up", "down" and the like are only used to represent the relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] In the present disclosure, when it is described that a specific component is located between a first component and a second component, there can be an intervening component between the specific component and the first component or the second component, or there can be no intervening component. When it is described that a specific component is connected to other components, the specific component can be directly connected to the other components without an intervening component, or it can not be directly connected to the other components with an intervening component.

[0043] All terms used in the present disclosure, including technical terms or scientific terms, have the same meaning as understood by those skilled in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or excessively formalized sense, unless specifically defined herein.

[0044] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art(s) can not be discussed in any detail since the techniques, methods, and apparatus should be considered part of the specification.

[0045] As shown in Figure 1 the embodiment provided by the gear sensor adaptive calibration control method in actual execution process, specifically includes the following steps:

[0046] Step S1, detecting the function of the gear sensor for abnormality.

[0047] In one embodiment of the gear sensor adaptive calibration control method of the application, the step S1 can specifically include:

[0048] Step S11, after the driver operates the shift lever into the target position, if the shift execution completion and the target gear signal feedback by the electronic shift execution mechanism are not received by the transmission control unit after exceeding the preset time threshold, record once gear sensor abnormality and accumulate.

[0049] Exemplarily, in one embodiment of the application, the preset time threshold is 300 ms. As shown in Figure 2 from the driver operating the shift lever into the target position, through signal detection and filtering (16 s), interrupt processing and shift logic detection (10 s), and then sending the shift request through CAN signal (10 s), a total of 36 ms is needed. The electronic shift execution mechanism needs at least 215 ms from receiving the shift lever gear request signal (10 s), interrupt processing (5 s), and driving the shift shaft into the corresponding gear (normal working condition is 200 ms, full load 35 o slope is 500 ms). Therefore, after 251 ms (36 ms + 215 ms) in normal working condition, the target gear signal can be detected by the gear sensor, and then the sensor position feedback and filtering (16 ms) are performed, and finally the CAN signal is sent out (10 ms). The total process needs 277 ms (251 ms + 16 ms + 10 ms), so the application designs the control logic to record once gear sensor abnormality if the transmission control unit TCU still does not receive the shift execution completion and the target gear signal feedback by the electronic shift execution mechanism after 300 ms.

[0050] Step S12, if the number of gear sensor abnormality exceeds the abnormality number threshold, the function of the gear sensor is judged to be abnormal.

[0051] Exemplarily, in one embodiment of the application, the abnormality number threshold is 3 times.

[0052] Step S2, if the gear sensor function detection is abnormal, the electronic gear actuator control unit prompts the gear sensor self-adapting calibration.

[0053] Specifically, in the case of gear sensor function detection abnormal, the electronic gear actuator control unit prompts the driver to park in P gear through the instrument, and performs gear sensor self-adapting calibration.

[0054] Specifically, if the gear sensor abnormality lasts for 3 times, the electronic gear control unit sends an adaptive calibration request prompt information to the instrument, prompting the driver to park and change the gear to P gear, and wait for the gear sensor to be recalibrated. As mentioned earlier, after the driver operates the gear lever to the target position, the electronic gear actuator control unit needs to send the target gear signal and the gear completion state signal after 277ms (under normal conditions), so the control algorithm sets the sensor abnormal value +1 if the target gear signal is not normally fed back after 300ms, and the abnormal value is more than 3 times, indicating that the sensor needs to be recalibrated.

[0055] Step S3, self-adapting calibration of the gear sensor by the electronic gear control unit.

[0056] As shown in the gear sensor self-adapting calibration control method of the present application, one embodiment of the present application, the step S3 can specifically include: Figure 3

[0057] Step S31, the electronic gear actuator control unit sends a self-learning instruction to the gear sensor.

[0058] Step S32, the electronic gear actuator control unit drives the gear actuator to rotate clockwise until it cannot rotate.

[0059] Step S33, the electronic gear actuator control unit sends a P gear exit instruction to drive the electronic gear actuator to rotate counterclockwise.

[0060] Step S34, record the first driving force valley point position as the P gear position.

[0061] Step S35, record the second driving force valley point position as the R gear position.

[0062] Step S36, record the third driving force valley point position as the N gear position.

[0063] Step S37, record the fourth driving force valley point position as the D gear position.

[0064] Further, in some embodiments of the present application, the gear sensor self-adapting calibration control method further includes:

[0065] ​Step S4: After the gear position sensor adaptive calibration is completed, determine whether the calibration is successful.

[0066] In one embodiment of the gear position sensor adaptive calibration control method of the present invention, step S4 may specifically include:

[0067] Step S41: The electronic shift actuator controller calculates the angle difference between the P gear, the R gear, the N gear, and the D gear.

[0068] Step S42: If the angle difference meets the design requirements, the calibration is determined to be successful.

[0069] Step S43: If the angle difference exceeds the corresponding angle difference design threshold, it is determined that the calibration has failed and adaptive calibration needs to be performed again.

[0070] Step S44: If the calibration times exceed the preset threshold and the calibration is still unsuccessful, it is determined that the calibration state of the gear position sensor is abnormal, and the driver is prompted to go to an after-sales service store for repair.

[0071] For example, the preset calibration number threshold is 5. In a specific implementation, the electronic shift control unit prompts the driver through the instrument panel that the vehicle needs to go to an after-sales service shop for repair.

[0072] Furthermore, if Figure 4 As shown in the figure, during the process of adaptive calibration and determining whether the calibration is successful, the gear position judgment principle of the gear sensor in the middle of each gear is as follows:

[0073] In the case of slow operation, the gear sensor can detect the gear signal. If the current gear is P gear, the gear signal is P gear before the driver enters R gear; if the current gear is R gear, the gear signal is R gear before the driver enters N gear; if the current gear is N gear, the gear signal is N gear before the driver enters D gear; if the current gear is D gear, the gear signal is D gear before the driver enters N gear; if the current gear is N gear, the gear signal is N gear before the driver enters R gear; if the current gear is R gear, the gear signal is R gear before the driver enters P gear;

[0074] In the case of rapid operation, the gear sensor may lose signal; if the current gear is P, when the driver quickly operates from P to the middle position of R→N, the sensor may lose the R gear signal, and the gear signal output is R; when the driver operates continuously and quickly from P to D, the gear signal must output P, ​​R, N, and D gear signals in sequence, and so on.

[0075] The gear sensor adaptive calibration control method provided by the embodiment of the application reminds the driver to stop the vehicle and starts adaptive calibration to recalibrate the positions of each gear when abnormal sensor calibration data occurs, so that the driver does not need to drive the vehicle to the after-sales site for initial calibration, and the calibration result after adaptive calibration is the same as that of initial calibration.

[0076] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0077] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A gear sensor adaptive calibration control method, characterized by, The application relates to a gear sensor function abnormality detection method and device. The gear sensor function is detected for abnormality; If the gear sensor function is detected for abnormality, the electronic gear shifting actuator control unit prompts gear sensor self-adapting calibration; The gear sensor is self-adapting calibrated by the electronic gear shifting control unit; After the gear sensor self-adapting calibration is completed, it is judged whether the calibration is successful; The gear sensor in-gear judgment principle is as follows: In the case of slow operation, the gear sensor can detect the gear signal, if the current gear is P gear, before the driver operates into R gear, the gear signal is P gear; if the current gear is R gear, before the driver operates into N gear, the gear signal is R gear; if the current gear is N gear, before the driver operates into D gear, the gear signal is N gear; if the current gear is D gear, before the driver operates into N gear, the gear signal is D gear; If the current gear is N gear, before the driver operates into R gear, the gear signal is N gear; if the current gear is R gear, before the driver operates into P gear, the gear signal is R gear; In the case of fast operation, the gear sensor may have signal loss; if the current gear is P gear, when the driver fast operates from P gear into the intermediate position of R-N, the sensor may have R gear signal loss, and the gear signal output is R gear; when the driver continuously fast operates from P gear into D gear, the gear signal must be output in sequence as P gear, R gear, N gear and D gear signals.

2. The gear sensor adaptive calibration control method according to claim 1, characterized in that, The gear sensor function is detected for abnormality, and the detection specifically comprises the following steps: After the driver operates the gear lever into a target position, if a preset time threshold is exceeded, the gearbox control unit has not received the gear shifting completion feedback and target gear signal of the electronic gear shifting actuator, once the gear sensor abnormality is recorded, and accumulation is carried out; If the number of gear sensor abnormalities exceeds an abnormality number threshold, the gear sensor function is judged to be abnormal.

3. The gear sensor adaptive calibration control method of claim 2, wherein, The preset time threshold is 300 ms, and the abnormality number threshold is 3 times.

4. The gear sensor adaptive calibration control method of claim 1, wherein In the case of gear sensor function abnormality, the electronic gear shifting actuator control unit prompts gear sensor self-adapting calibration, and the calibration specifically comprises the following steps: The electronic gear shifting actuator control unit prompts the driver to park in P gear through an instrument, and carries out gear sensor self-adapting calibration.

5. The gear sensor adaptive calibration control method of claim 1, wherein, The gear sensor is self-adapting calibrated by the electronic gear shifting control unit, and the calibration specifically comprises the following steps: The electronic gear shifting actuator control unit sends a self-learning instruction to the gear sensor; The electronic gear shifting actuator control unit drives the gear shifting actuator to rotate clockwise until it cannot rotate; The electronic gear shifting actuator control unit sends a P gear exit instruction to drive the electronic gear shifting actuator to rotate counterclockwise; A first driving force valley point position is recorded as a P gear position; A second driving force valley point position is recorded as an R gear position; A third driving force valley point position is recorded as an N gear position; A fourth driving force valley point position is recorded as a D gear position.

6. The gear sensor adaptive calibration control method of claim 1, wherein After the gear sensor self-adapting calibration is completed, it is judged whether the calibration is successful, and the judgment specifically comprises the following steps: The electronic gear shifting actuator control unit calculates the angle difference between P gear, R gear, N gear and D gear. If the angle difference meets the design requirement, it is determined that the calibration is successful; If the angle difference exceeds the corresponding angle difference design threshold, it is determined that the calibration fails, and adaptive calibration needs to be performed again; If it is still unsuccessful after exceeding the preset calibration number threshold, it is determined that the gear sensor calibration state is abnormal, and the driver is prompted to go to the after-sales service store for maintenance.

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