AMT shift control method and vehicle

Abstract

The present invention relates to the field of vehicle technology and discloses an automated manual transmission (AMT) shift control method and a vehicle. The AMT shift control method specifically includes: determining in real time whether a shift position sensor is abnormal; if the shift position sensor is abnormal, determining whether a shift request exists; and if a shift request exists, controlling the vehicle to shift from its current gear to its starting gear. Thus, when the shift position sensor is abnormal, the vehicle is forcibly controlled to shift from its current gear to its starting gear, allowing the vehicle to limp to a safe area in its starting gear and then park. This effectively avoids the safety hazard of the prior art of directly shifting the vehicle's current gear to neutral, resulting in an inability to move the vehicle. This method effectively ensures the safety of the vehicle and driver, improves the vehicle's ability to handle faults, and thus enhances the vehicle's usability.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to an AMT shift control method and a vehicle. Background Art

[0002] As demand for driving comfort increases, commercial vehicles are increasingly adopting automated manual transmissions (AMTs) instead of manual transmissions (MTs) to reduce driver workload. AMTs are developed based on manual transmissions. AMTs use an automatic shift actuator to replace manual operation for shifting gears. The AMT includes a shift position sensor. The Transmission Control Unit (TCU) determines the vehicle's current gear position by identifying the shift fork position based on the AMT's shift position sensor. However, if the shift position sensor is exposed to electromagnetic interference or the wiring harness becomes loose or even disconnected, the output value of the AMT can exceed the normal range.

[0003] There are two existing solutions to this problem: one is to verify the shift position sensor's measurement value to prevent misreading. The other is to directly control the vehicle's current gear to neutral when the shift position sensor's output value exceeds the normal range, causing the vehicle to lose power and become unable to move. Directly controlling the vehicle's current gear to neutral when the shift position sensor's output value exceeds the normal range, if the vehicle is at an intersection or traveling at high speed, it is impossible to move to the side of the road to resolve the problem, which is detrimental to the safety of both the driver and the vehicle. Summary of the Invention

[0004] The purpose of the present invention is to provide an AMT shift control method and vehicle to solve the problem in the prior art that after the output value of the shift position sensor exceeds the normal range, the current gear position of the vehicle is directly controlled to be adjusted to neutral, and the vehicle cannot be moved to the roadside to solve the fault, which is not conducive to the safety of the driver and the vehicle.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The AMT shift control method includes:

[0007] Real-time judgment of whether the shift position sensor is abnormal;

[0008] If the shift position sensor is abnormal, determining whether there is a shift demand;

[0009] If there is a gear shift requirement, the vehicle is controlled to shift from the current gear to the starting gear.

[0010] As a preferred solution of the above-mentioned AMT shift control method, the specific steps of determining in real time whether the shift position sensor is abnormal include:

[0011] determining whether an output value of the shift position sensor is within a shift limit setting value range;

[0012] If the output value of the shift position sensor is within the shift limit setting value range, the shift position sensor is normal; re-determine whether the shift position sensor is abnormal;

[0013] If the output value of the shift position sensor is not within the shift limit setting value range, the shift position sensor is abnormal.

[0014] As a preferred solution of the above-mentioned AMT shift control method, the specific steps of determining whether there is a shift demand include:

[0015] Determine whether the vehicle's current real-time speed is greater than zero;

[0016] If the current real-time speed of the vehicle is equal to zero, it is determined whether the driver operates a gear shift;

[0017] If the driver operates the gear shift, it is determined that there is a gear shift demand;

[0018] If the driver does not operate the gear shift, it is determined that there is no gear shift demand;

[0019] If the vehicle's current real-time speed is greater than zero, then determine whether the vehicle's power meets the vehicle's driving requirements in the current gear;

[0020] If the vehicle's power does not meet the vehicle's driving requirements in the current gear, it is determined that there is a need to shift gears;

[0021] If the power of the entire vehicle meets the driving requirements of the vehicle in the current gear, it is determined that there is no need to shift gears.

[0022] As a preferred solution of the above-mentioned AMT shift control method, the specific steps of determining whether the power performance of the vehicle meets the driving requirements of the vehicle in the current gear include:

[0023] Determine whether the vehicle's current acceleration is less than the set acceleration value; determine whether the vehicle's current throttle opening is greater than the set throttle opening;

[0024] If the current acceleration of the vehicle is less than the set acceleration value, and the current throttle opening of the vehicle is greater than the set throttle opening, then the power of the vehicle does not meet the driving requirements of the vehicle in the current gear;

[0025] If the current acceleration of the vehicle is greater than or equal to the set acceleration value, and / or the current throttle opening of the vehicle is less than or equal to the set throttle opening, the power of the entire vehicle meets the driving requirements of the vehicle in the current gear.

[0026] As a preferred solution of the above-mentioned AMT shift control method, after controlling the vehicle to shift from the current gear to the starting gear, the following steps are further included:

[0027] Determining whether the current gear of the vehicle has been converted to the starting gear;

[0028] If the current gear of the vehicle has been converted to the starting gear, determining whether the output torque of the vehicle is normal;

[0029] If the output torque of the vehicle is normal, the output torque is controlled to continue to be output so that the vehicle travels in the starting gear, and a "shift position sensor failure" is reported;

[0030] If the output torque of the vehicle is abnormal, the control will clear the output torque of the vehicle and report "shift position sensor failure".

[0031] As a preferred solution of the above-mentioned AMT shift control method, when the vehicle is controlled to shift from the current gear to the starting gear, a timer is started and recorded as the shift duration;

[0032] The specific steps of determining whether the current gear of the vehicle has been converted to the starting gear include:

[0033] Determining whether the shifting time is greater than or equal to a set shifting time;

[0034] If the gear shifting time is greater than or equal to the set gear shifting time, it is determined that the current gear of the vehicle has been converted to the starting gear.

[0035] As a preferred solution of the above-mentioned AMT shift control method, the specific steps of determining whether the output torque of the vehicle is normal include:

[0036] Calculate the ratio of the current real-time input shaft speed of the AMT to the current real-time output shaft speed;

[0037] Whether the output torque of the vehicle is normal is determined based on the ratio and a first set ratio.

[0038] As a preferred solution of the above-mentioned AMT shift control method, the specific steps of determining whether the output torque of the vehicle is normal based on the ratio and the first set ratio include:

[0039] determining whether a difference between the ratio and a first set ratio is within a first set difference range;

[0040] If the difference is within the first set difference range, the output torque of the vehicle is normal;

[0041] If the difference is not within the first set difference range, the output torque of the vehicle is abnormal.

[0042] As a preferred solution of the above-mentioned AMT shift control method, if there is no shift demand, it is determined whether the current real-time speed of the vehicle is greater than zero;

[0043] If the vehicle's current real-time speed is equal to zero, the work ends;

[0044] If the current real-time speed of the vehicle is greater than zero, then determining whether the output torque of the vehicle is normal;

[0045] If the output torque of the vehicle is normal, the output torque is controlled to continue to be output so that the vehicle travels in the current gear and a "shift position sensor failure" is reported;

[0046] If the output torque of the vehicle is abnormal, the control will clear the output torque of the vehicle and report "shift position sensor failure".

[0047] A vehicle includes an AMT actuator and a shift position sensor provided on the AMT actuator, and the vehicle is used to implement the above-mentioned AMT shift control method.

[0048] Beneficial effects of the present invention:

[0049] The purpose of the present invention is to provide an AMT shift control method, which specifically includes: real-time judgment on whether a shift position sensor is abnormal; if the shift position sensor is abnormal, judgment on whether there is a shift demand; if there is a shift demand, control the vehicle's current gear to be converted to a starting gear. With this arrangement, when the shift position sensor is abnormal, the vehicle is forcibly controlled to be converted from the current gear to the starting gear, so that the vehicle can limp to a safe area in the starting gear and then park, thereby effectively avoiding the safety hazard caused by the inability to move the vehicle due to the current gear of the vehicle being directly adjusted to neutral in the prior art, effectively ensuring the safety of the vehicle and the driver, improving the vehicle's fault handling capability, and thus improving the vehicle's performance.

[0050] The present invention also provides a vehicle. When the shift position sensor is abnormal, the vehicle operation is controlled by the above-mentioned AMT shift control method, which can effectively avoid the safety hazard caused by the inability to move the vehicle due to the current gear of the vehicle being directly adjusted to neutral in the prior art. It can effectively ensure the safety of the vehicle and the driver, improve the vehicle's fault handling ability, and improve the vehicle's performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 The process of the AMT shift control method provided by the specific embodiment of the present invention is Figure 1 ;

[0052] Figure 2 The process of the AMT shift control method provided by the specific embodiment of the present invention is Figure 2 ;

[0053] Figure 3 The process of the AMT shift control method provided by the specific embodiment of the present invention is Figure 3 ;

[0054] Figure 4 It is a gear selection-shifting coordinate diagram of a certain model of a six-speed AMT provided by a specific embodiment of the present invention. DETAILED DESCRIPTION

[0055] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0056] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0057] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0058] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0059] The present invention provides a vehicle comprising an automated manual transmission (AMT) actuator and a shift position sensor disposed on the AMT actuator. Specifically, the vehicle further comprises a transmission control unit (TCU), which is electrically connected to the shift position sensor. After detecting a shift signal, the shift position sensor feeds the signal back to the TCU, which then controls the operation of the corresponding actuator.

[0060] It should be noted that the AMT actuator used in the present invention is a pneumatic AMT actuator commonly used in the art. Specifically, the pneumatic AMT actuator includes an air source, a solenoid valve, and a shift cylinder. The air source, solenoid valve, and shift cylinder are connected in sequence. The solenoid valve is electrically connected to the transmission control unit (TCU), and a shift knob is provided on the output rod of the shift cylinder. When shifting, the TCU controls the solenoid valve to connect the air source and the shift cylinder. The air source supplies air to the shift cylinder, driving the output rod of the shift cylinder to move, thereby driving the shift knob provided on the output rod of the shift cylinder to move synchronously to perform the shifting action. During this process, the shift position sensor synchronously detects the position signal of the output rod of the shift cylinder and feeds the position signal of the output rod of the shift cylinder back to the TCU. When the gear is shifted, the TCU controls the solenoid valve to stop working, exhausting the gas in the shift cylinder through the solenoid valve, and the shifting action ends.

[0061] The shift position sensor's output value may exceed the normal range due to electromagnetic interference or a loose or even detached wiring harness. There are two existing solutions to this problem: one is to verify the shift position sensor's measurement value to prevent mismeasurement, and the other is to directly control the vehicle's current gear position to neutral when the shift position sensor's output value exceeds the normal range. Directly controlling the vehicle's current gear position to neutral when the shift position sensor's output value exceeds the normal range, if the vehicle is at an intersection or traveling at high speed, it is impossible to move to the side of the road to resolve the problem, which is detrimental to the safety of the driver and vehicle.

[0062] Therefore, the present invention also provides an AMT shift control method, which is used to control the above-mentioned vehicle. When the shift position sensor is abnormal, the vehicle is controlled by the AMT shift control method, which can effectively avoid the safety hazard caused by the inability to move the vehicle due to the current gear of the vehicle being directly adjusted to neutral in the prior art. It can effectively ensure the safety of the vehicle and the driver, improve the vehicle's fault handling ability, and improve the vehicle's performance.

[0063] Specifically, if Figure 1-3 As shown, the AMT shift control method includes:

[0064] S100: Determine in real time whether the shift position sensor is abnormal.

[0065] If the shift position sensor is abnormal, proceed to step S200.

[0066] If the shift position sensor is normal, the process returns to S100 and re-determines whether the shift position sensor is abnormal.

[0067] Specifically, the specific steps of determining in real time whether the shift position sensor is abnormal include:

[0068] Determine whether the output value of the shift position sensor is within the shift limit setting value range.

[0069] If the output value of the shift position sensor is within the shift limit setting value range, the shift position sensor is normal. The process returns to S100 and re-determines whether the shift position sensor is abnormal.

[0070] If the output value of the shift position sensor is not within the shift limit setting value range, the shift position sensor is abnormal.

[0071] The shift limit setting value range is obtained based on the limit movement range of the shift knob.

[0072] Specifically, if Figure 4 As shown in the diagram, using a six-speed automatic transmission (AMT) gear selection and shifting diagram as an example, the shift limit setting range is 8 mm to 28 mm. If the shift position sensor output value is outside this range, that is, if the shift position sensor output value is less than 8 mm or greater than 28 mm, the shift position sensor output value exceeds the normal range, indicating a shift position sensor failure.

[0073] It is understandable that the range of shift limit setting values ​​corresponding to AMTs of different models and different numbers of gears is different.

[0074] S200: Determine whether there is a gear shift requirement.

[0075] Specifically, the steps of determining whether there is a gear shift requirement include:

[0076] S210: Determine whether the current real-time speed of the vehicle is greater than zero.

[0077] If the current real-time speed of the vehicle is equal to zero, then step S220 is performed. At this time, the vehicle is in neutral.

[0078] If the current real-time speed of the vehicle is greater than zero, proceed to step S230.

[0079] S220: Determine whether the driver has performed a gear shift operation.

[0080] If the driver shifts gears, it is determined that there is a shift requirement. Step S300 is performed. Specifically, in this case, the driver shifts gears from neutral to D / R / M, where D is a forward gear, R is a reverse gear, and M is an up / down gear.

[0081] If the driver does not perform a gear shift operation, it is determined that there is no gear shift requirement, and the process proceeds to step S400.

[0082] S230: Determine whether the power of the vehicle meets the driving requirements of the vehicle in the current gear.

[0083] Specifically, determining whether the power of the vehicle meets the driving requirements of the vehicle in the current gear includes the following steps:

[0084] The factors affecting whether the power of the vehicle meets the driving requirements of the vehicle in the current gear include at least acceleration and throttle opening.

[0085] Determine whether the vehicle's current acceleration is less than the set acceleration value; determine whether the vehicle's current throttle opening is greater than the set throttle opening.

[0086] If the vehicle's current acceleration is less than the set acceleration value and the vehicle's current throttle opening is greater than the set throttle opening, the vehicle's power does not meet the vehicle's driving requirements in the current gear. A gear shift requirement is determined, and the process proceeds to step S300.

[0087] If the current acceleration of the vehicle is greater than or equal to the set acceleration value, and / or the current throttle opening of the vehicle is less than or equal to the set throttle opening, the vehicle's power meets the driving requirements of the vehicle in the current gear, and it is determined that there is no gear shift requirement. Step S400 is performed.

[0088] S300: Control the vehicle to switch from the current gear to the starting gear.

[0089] Specifically, at this time, when the current gear of the vehicle is not neutral, the current gear of the vehicle is converted to the starting gear by disengaging, selecting and engaging gears. When the current gear of the vehicle is neutral, the current gear of the vehicle is converted to the starting gear by selecting and engaging gears.

[0090] This arrangement allows the vehicle to limp to a safe area in the starting gear and then stop, which can effectively avoid the safety hazard caused by the inability to move the vehicle due to the prior art of directly adjusting the current gear of the vehicle to neutral.

[0091] The term "starting gear" refers to a specific gear position determined by the TCU after the driver engages D gear based on some or all of the vehicle's current load, road slope, braking status, and throttle position. For example, assuming a vehicle with a six-speed automatic transmission (AMT) is engaged, the TCU determines the vehicle's starting gear position based on the vehicle's current load and road slope. For example, the starting gear position is higher when the vehicle is unloaded than when it is fully loaded. It is understood that the starting gear position may also vary depending on the vehicle's load and road slope. The specific steps for determining the vehicle's starting gear position based on factors such as the vehicle's current load, road slope, braking status, and throttle position are known in the art and will not be elaborated upon here. Of course, for vehicles with simpler performance requirements, a fixed gear position may be used as the starting gear.

[0092] Since the shift position sensor has been determined to be abnormal, it is necessary to confirm whether the vehicle has shifted from the current gear to the starting gear through other means, such as Figure 2 As shown, it also includes steps S310 to S340.

[0093] S310: Determine whether the current gear of the vehicle has been converted to a starting gear.

[0094] Specifically, the specific steps of determining whether the current gear of the vehicle has been converted to the starting gear include:

[0095] When the current gear of the vehicle is controlled to be converted into the starting gear, the timing is started and recorded as the gear shifting duration. That is, when step S300 is performed, the timing is started and recorded as the gear shifting duration.

[0096] Determine whether the current gear of the vehicle has been converted to the starting gear based on the gear shifting time.

[0097] More specifically, the specific steps of determining whether the current gear of the vehicle has been converted to the starting gear according to the gear shifting time include:

[0098] Determine whether the gear shifting time is greater than or equal to the set gear shifting time.

[0099] If the shifting time is greater than or equal to the set shifting time, it is determined that the current gear of the vehicle has been converted to the starting gear, and the process proceeds to step S320.

[0100] If the shift time is less than the set shift time, the shift time is re-determined to see if it is greater than or equal to the set shift time. If the shift time is greater than or equal to the set shift time, the vehicle's current gear is determined to have been switched to the starting gear. The process proceeds to step S320.

[0101] Specifically, since an abnormality has been detected in the shift position sensor, the shift duration is used to determine whether the vehicle's current gear has been switched to the starting gear. The shift duration is set to an empirical value obtained through extensive prior testing. It is understood that the shift duration is related to the amount of air charged to the shift cylinder, so the amount of air charged to the shift cylinder can also be used to determine whether the vehicle's current gear has been switched to the starting gear.

[0102] More specifically, when the vehicle's current gear needs to be shifted to a starting gear, the solenoid valve is controlled to connect the air source and the shift cylinder, thereby inflating the shift cylinder and shifting the vehicle from the current gear to the starting gear. Specifically, when the vehicle's current gear is not neutral, the shift duration from the current gear to the starting gear through gear disengagement, selection, and shifting is a first shift duration, which is also the first inflation duration. When the vehicle's current gear is neutral, the shift duration from the current gear to the starting gear through gear selection and shifting is a second shift duration, which is also the second inflation duration. It will be understood that the first shift duration and the second shift duration are different values.

[0103] S320: Determine whether the output torque of the vehicle is normal.

[0104] The method of determining whether the vehicle's output torque is normal based on the current real-time input shaft speed and the current real-time output shaft speed of the AMT comprises the following steps:

[0105] Calculate the ratio of the current real-time input shaft speed of the AMT to the current real-time output shaft speed.

[0106] Whether the output torque of the vehicle is normal is determined based on the ratio and a first set ratio.

[0107] Specifically, it is determined whether the difference between the ratio and the first set ratio is within the first set difference range.

[0108] If the difference is within the first set difference range, the vehicle output torque is normal, and the process proceeds to step S330.

[0109] If the difference is not within the first set difference range, the vehicle output torque is abnormal, and the process proceeds to step S340.

[0110] After the vehicle's current gear is converted to the starting gear, whether the vehicle's output torque is normal is determined based on the AMT's current real-time input shaft speed and the current real-time output shaft speed. It can be further verified whether the vehicle's current gear is successfully converted to the starting gear. If the vehicle's current gear is successfully converted to the starting gear, step S330 can be performed to make the vehicle travel in the starting gear.

[0111] Specifically, the first set ratio is determined during design based on the input shaft set speed and output shaft set speed matching the starting gear. Specifically, the first set ratio = the input shaft set speed for the starting gear / the output shaft set speed for the starting gear. Specifically, the first set difference range is an empirical value obtained through extensive early testing.

[0112] S330: Control the output torque to continue outputting so that the vehicle moves in the starting gear, and report a "shift position sensor failure."

[0113] This arrangement allows the vehicle to effectively limp to a safe area in the starting gear and then stop, thereby effectively avoiding the safety hazard caused by the inability to move the vehicle due to the prior art of directly adjusting the current gear of the vehicle to neutral.

[0114] S340: The control clears the output torque of the vehicle to zero and reports a "shift position sensor fault".

[0115] Specifically, if the vehicle's output torque is abnormal, the vehicle's output torque in the starting gear will be uncontrolled, and the vehicle may have faults such as motor runaway. Therefore, the control will reset the vehicle's output torque to zero, and the vehicle will glide and stop by inertia, which can further effectively ensure the safety of the vehicle and the driver.

[0116] If there is no shifting requirement, the AMT shifting control method further includes steps S400 to S430, specifically as follows: Figure 3 shown.

[0117] S400: Determine whether the current real-time speed of the vehicle is greater than zero.

[0118] If the vehicle's current real-time speed is equal to zero, the operation is terminated. At this point, the vehicle is in a parked state.

[0119] If the current real-time speed of the vehicle is greater than zero, proceed to step S410.

[0120] S410: Determine whether the output torque of the vehicle is normal.

[0121] The method of determining whether the vehicle's output torque is normal based on the current input shaft speed and the current output shaft speed is as follows:

[0122] Calculate the ratio of the current real-time input shaft speed of the AMT to the current real-time output shaft speed.

[0123] Whether the output torque of the vehicle is normal is determined based on the ratio and a second set ratio.

[0124] Specifically, it is determined whether the difference between the ratio and the second set ratio is within a set difference range.

[0125] If the difference is within the second set difference range, the vehicle output torque is normal, and the process proceeds to step S420.

[0126] If the difference is not within the second set difference range, the output torque of the vehicle is abnormal, and the process proceeds to step S430.

[0127] Specifically, the second set ratio is determined during AMT design based on the input shaft speed setting and output shaft speed setting that match the current gear. Specifically, the second set ratio = input shaft speed setting for the current gear / output shaft speed setting for the current gear. The second set difference range is empirically determined based on extensive prior testing.

[0128] It is understandable that when there is no gear shifting demand in the vehicle and the current gear of the vehicle is the starting gear, the first set ratio and the second set ratio are the same, and the first set difference range and the second set difference range are the same.

[0129] S420: Control the output torque to continue outputting, allowing the vehicle to travel in the current gear, and report a "Shift Position Sensor Fault" message. It is understood that at this point, the vehicle's output torque matches the vehicle's current gear. This allows the vehicle to continue driving in the current gear until it reaches a safe area and then stops. This effectively avoids the safety hazard associated with prior art techniques where the vehicle's current gear is directly shifted to neutral, resulting in an inability to move the vehicle.

[0130] S430: The control clears the output torque of the vehicle to zero and reports a "shift position sensor fault".

[0131] Specifically, if the vehicle's output torque is abnormal, the vehicle's output torque in the current gear will be uncontrolled, and the vehicle may have faults such as motor runaway. Therefore, the control will reset the vehicle's output torque to zero, and the vehicle will glide and stop by inertia, which can effectively ensure the safety of the vehicle and the driver.

[0132] Therefore, when the shift position sensor is abnormal, the vehicle is controlled by the AMT shift control method, and the vehicle is forcibly controlled to shift from the current gear to the starting gear, so that the vehicle can limp to a safe area in the starting gear and then park. This can effectively avoid the safety hazard caused by the inability to move the vehicle by directly adjusting the current gear of the vehicle to neutral in the prior art, and can effectively protect the safety of the vehicle and the driver, improve the vehicle's ability to handle faults, and improve the vehicle's performance.

[0133] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. AMT shift control method, characterized in that: include: Real-time judgment of whether the shift position sensor is abnormal; If the shift position sensor is abnormal, determining whether there is a shift demand; If there is a gear shift requirement, the vehicle is controlled to shift from the current gear to the starting gear; Determining whether the current gear of the vehicle has been converted to the starting gear; If the current gear of the vehicle has been converted to the starting gear, determining whether the output torque of the vehicle is normal; If the output torque of the vehicle is normal, the output torque is controlled to continue to be output so that the vehicle travels in the starting gear and a "shift position sensor fault" is reported; If the vehicle's output torque is abnormal, the control will reset the vehicle's output torque to zero and report "shift position sensor failure"; If there is no gear shifting requirement, determine whether the vehicle's current real-time speed is greater than zero; If the vehicle's current real-time speed is equal to zero, the work ends; If the current real-time speed of the vehicle is greater than zero, then determining whether the output torque of the vehicle is normal; If the output torque of the vehicle is normal, the output torque is controlled to continue to be output so that the vehicle travels in the current gear and a "shift position sensor fault" is reported; If the vehicle's output torque is abnormal, the control will reset the vehicle's output torque to zero and report "shift position sensor failure"; The specific steps of determining whether there is a gear shift requirement include: Determine whether the vehicle's current real-time speed is greater than zero; If the current real-time speed of the vehicle is equal to zero, it is determined whether the driver operates a gear shift; If the driver operates the gear shift, it is determined that there is a gear shift demand; If the driver does not operate the gear shift, it is determined that there is no gear shift demand; If the vehicle's current real-time speed is greater than zero, then determine whether the vehicle's power meets the vehicle's driving requirements in the current gear; If the vehicle's power does not meet the vehicle's driving requirements in the current gear, it is determined that there is a need to shift gears; If the power of the entire vehicle meets the driving requirements of the vehicle in the current gear, it is determined that there is no need to shift gears.

2. The AMT shift control method according to claim 1, characterized in that: The specific steps for determining whether the shift position sensor is abnormal in real time include: determining whether an output value of the shift position sensor is within a shift limit setting value range; If the output value of the shift position sensor is within the shift limit setting value range, the shift position sensor is normal; re-determine whether the shift position sensor is abnormal; If the output value of the shift position sensor is not within the shift limit setting value range, the shift position sensor is abnormal.

3. The AMT shift control method according to claim 1, characterized in that: The specific steps for determining whether the vehicle's power meets the vehicle's driving requirements in the current gear include: Determine whether the vehicle's current acceleration is less than the set acceleration value; determine whether the vehicle's current throttle opening is greater than the set throttle opening; If the current acceleration of the vehicle is less than the set acceleration value, and the current throttle opening of the vehicle is greater than the set throttle opening, then the power of the vehicle does not meet the driving requirements of the vehicle in the current gear; If the current acceleration of the vehicle is greater than or equal to the set acceleration value, and / or the current throttle opening of the vehicle is less than or equal to the set throttle opening, the power of the entire vehicle meets the driving requirements of the vehicle in the current gear.

4. The AMT shift control method according to claim 1, characterized in that: When the vehicle is controlled to shift from the current gear to the starting gear, the timing starts and is recorded as the shifting time; The specific steps of determining whether the current gear of the vehicle has been converted to the starting gear include: Determining whether the shifting time is greater than or equal to a set shifting time; If the gear shifting time is greater than or equal to the set gear shifting time, it is determined that the current gear of the vehicle has been converted to the starting gear.

5. The AMT shift control method according to claim 1, characterized in that: The specific steps to determine whether the vehicle's output torque is normal include: Calculate the ratio of the current real-time input shaft speed of the AMT to the current real-time output shaft speed; Whether the output torque of the vehicle is normal is determined based on the ratio and a first set ratio.

6. The AMT shift control method according to claim 5, characterized in that: The specific steps of determining whether the output torque of the vehicle is normal based on the ratio and the first set ratio include: determining whether a difference between the ratio and a first set ratio is within a first set difference range; If the difference is within the first set difference range, the output torque of the vehicle is normal; If the difference is not within the first set difference range, the output torque of the vehicle is abnormal.

7. A vehicle comprising an AMT actuator and a shift position sensor provided on the AMT actuator, characterized in that: The vehicle is used to implement the AMT shift control method according to any one of claims 1 to 6.

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