CN116538289A - AMT gear shift off control method and device, vehicle and storage medium - Google Patents
AMT gear shift off control method and device, vehicle and storage medium Download PDFInfo
- Publication number
- CN116538289A CN116538289A CN202310820108.4A CN202310820108A CN116538289A CN 116538289 A CN116538289 A CN 116538289A CN 202310820108 A CN202310820108 A CN 202310820108A CN 116538289 A CN116538289 A CN 116538289A
- Authority
- CN
- China
- Prior art keywords
- gear
- vehicle
- transmission chain
- gradient
- torque
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 74
- 238000003860 storage Methods 0.000 title claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 93
- 230000008569 process Effects 0.000 claims abstract description 30
- 230000007935 neutral effect Effects 0.000 claims abstract description 18
- 238000004590 computer program Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/42—Ratio indicator devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention relates to the technical field of vehicles, and particularly discloses an AMT gear-shifting control method, an AMT gear-shifting control device, a vehicle and a storage medium, wherein the AMT gear-shifting control method acquires the gradient of a road where the vehicle is located after receiving a gear-shifting instruction, and when the gradient exceeds a set gradient, a motor starts to perform torque-clearing operation; acquiring the current speed and the transmission chain clearance; determining the required time for eliminating the transmission chain gap in the torque clearing process based on the current speed and the transmission chain gap; the gear is shifted to a set position in the required time, and the motor continues to clear torque until the torque is zero; and executing a second gear shifting operation until the current gear shifting position is shifted to the neutral gear position. The gear is picked to the set position in the required time for eliminating the transmission chain gap in the torque clearing process, the reliable adjustment of the gear position can be ensured, and when the second gear picking operation is executed subsequently, the gear position is relatively close to the neutral gear position, so that the acting force of the combining sleeve and the gear ring is relatively reduced, and the success rate of the gear picking is improved.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an AMT gear shift off control method and device, a vehicle and a storage medium.
Background
An electronic control mechanical automatic transmission (AMT) is an electromechanical-hydraulic integrated automatic transmission which integrates the advantages of an AT (automatic) gearbox and an MT (manual) gearbox, and the AMT not only has the advantages of automatic speed change of a hydraulic automatic transmission, but also maintains the advantages of high efficiency, low cost, simple structure and easy manufacture of the gear transmission of the original manual transmission.
In the existing AMT gear shifting process, if the speed of the vehicle is changed greatly, the acting force between the input shaft and the output shaft (the acting force is embodied between the combination sleeve and the gear ring and is called gear shifting resistance) is too large, so that gear shifting can be influenced, and the gear shifting success rate is further influenced. In this regard, a gear shift control method for an electric vehicle is disclosed in the earlier patent with the application number CN202211178894.4, when shifting gears, the motor is controlled to torque to a first target torque, and then the gearbox is controlled to shift gears, wherein the first target torque is determined according to the gradient of the road surface on which the vehicle is located, the rotation speed of the motor and the mass of the vehicle, so that the torque of the motor can be better adapted to the working conditions of the vehicle, and the gear shift resistance between the combination sleeve and the gear caused by the working condition change can be offset to a greater extent, thereby realizing automatic gear shift and avoiding gear shift failure. However, in the vehicle gear shift control method, the influence factor of the first target torque is too much, and the influence factor is related to the gradient and the load of the vehicle and the road surface condition, so that the situation that the gear is out of control easily occurs in the actual operation process.
Disclosure of Invention
The invention aims at: an AMT gear-shifting control method is provided to improve the success rate of gear shifting.
In a first aspect, the present invention provides an AMT shift-off control method, including:
determining that a gear shifting instruction is received;
acquiring the gradient of a road on which a vehicle is positioned;
judging whether the gradient exceeds a set gradient;
if yes, the motor starts to perform torque clearing operation;
acquiring the current speed of a vehicle and a transmission chain gap between a combination sleeve and a gear ring, wherein the transmission chain gap is the maximum gap between a tooth part of the combination sleeve and a tooth groove of the gear ring after the tooth part of the combination sleeve and the tooth groove of the gear ring are meshed with each other;
determining the required time for eliminating the transmission chain gap in the torque clearing process based on the current vehicle speed and the transmission chain gap;
executing a first gear shifting operation in the required time of the transmission chain clearance until the gear shifting is shifted to a set position, wherein the combination sleeve is meshed with the gear ring when the gear shifting is shifted to the set position;
the motor continues to clear torque until the torque is zero;
and executing a second gear shifting operation until the current gear shifting position is shifted to the neutral gear position.
As a preferred technical solution of the AMT shift-out control method, the AMT shift-out control method further comprises the following steps, before the gear shift instruction is determined to be received:
when the vehicle is stopped for the first time in the driving cycle, the motor rotates in a first direction and stops until the vehicle has signs of starting;
the motor rotates in a second direction opposite to the first direction and stops until the vehicle has a sign of starting, and the rotating speed of the motor at each time point is recorded in real time in the process;
the drive train gap is determined based on the rotational speed of the motor at each point in time.
As a preferred embodiment of the AMT upshift control method, determining that the vehicle has a start sign includes:
the vehicle is determined to have signs of start when the vehicle speed of the vehicle exceeds zero, and is determined to have no signs of start when the vehicle speed of the vehicle is equal to zero.
As a preferred technical solution of the AMT gear shift control method, executing a first gear shift operation in a required time of the transmission chain gap, and until the gear shift is shifted to a set position, including:
executing a first gear shifting operation;
acquiring the position of the current gear;
judging whether the current gear position is positioned at the set position or not;
if yes, determining gear shifting to the set position; and if not, repeatedly acquiring the position of the current gear.
As a preferable technical solution of the AMT shift-off control method, when judging whether the gradient exceeds a set gradient, if the gradient does not exceed the set gradient, the AMT shift-off control method further includes:
the motor starts to carry out torque clearing operation until the torque is cleared;
and executing a third gear-off operation until the current gear is in the neutral gear.
As an optimal technical scheme of the AMT gear shift control method, determining the required time for eliminating the transmission chain gap in the torque clearing process based on the current vehicle speed and the transmission chain gap comprises the following steps:
acquiring the association relation between the current vehicle speed and the transmission chain gap and the required time;
and inquiring corresponding demand time from the association relation based on the acquired current vehicle speed and the transmission chain gap.
In a second aspect, the present invention provides an AMT shift-off control device, including:
the gear shifting instruction determining module is used for determining that a gear shifting instruction is received;
the gradient acquisition module is used for acquiring the gradient of the road where the vehicle is located;
the gradient judging module is used for judging whether the gradient exceeds a set gradient;
the first torque clearing execution power module is used for enabling the motor to start torque clearing operation when the gradient exceeds a set gradient;
the parameter acquisition module is used for acquiring the current speed of the vehicle and a transmission chain gap between the combination sleeve and the gear ring, wherein the transmission chain gap is the maximum gap between the tooth part of the combination sleeve and the tooth groove of the gear ring after the tooth part of the combination sleeve and the tooth groove of the gear ring are meshed with each other;
the transmission chain clearance determining module is used for determining the required time for eliminating the transmission chain clearance in the torque clearing process based on the current vehicle speed and the transmission chain clearance;
the first gear-shifting operation executing module is used for executing a first gear-shifting operation until the gear is shifted to a set position, wherein the combining sleeve is meshed with the gear ring when the gear is shifted to the set position;
the second torque clearing execution power module is used for enabling the motor to continue torque clearing until the torque is zero;
and the second gear shifting operation executing module is used for executing the second gear shifting operation until the current gear shifting position is shifted to the neutral gear position.
As a preferred technical solution of the AMT shift control device, the AMT shift control device further includes:
the parking determining module is used for determining first parking in a driving cycle;
the first motor execution module is used for enabling the motor to rotate along a first direction when the vehicle is stopped for the first time in a driving cycle and stopping until the vehicle has a starting sign;
the second motor execution module is used for enabling the motor to rotate in a second direction opposite to the first direction, stopping until the vehicle has a starting sign, and recording the rotating speed of the motor at each time point in real time in the process;
and the transmission chain clearance determining module is used for determining the transmission chain clearance based on the rotating speed of the motor at each time point.
In a third aspect, the present invention provides a vehicle comprising an AMT, the vehicle further comprising:
a driving controller;
the gyroscope is used for collecting the gradient of the road where the vehicle is located and sending the collected gradient to the driving controller;
the gear sensor is used for collecting the position of the current gear of the vehicle and sending the collected position of the current gear to the driving controller;
the speed sensor is used for collecting the speed of the vehicle and sending the collected speed to the driving controller;
a memory for storing one or more programs;
and when the one or more programs are executed by the driving controller, the driving controller controls the vehicle to realize the AMT off-shift control method in any scheme.
In a fourth aspect, the present invention further provides a storage medium having stored thereon a computer program which, when executed by a driving controller, causes a vehicle to implement the AMT off-hook control method described in any one of the above aspects.
The beneficial effects of the invention are as follows:
the invention provides an AMT gear shift off control method, an AMT gear shift off control device, a vehicle and a storage medium, wherein the AMT gear shift off control method is used for determining that a gear shift instruction is received; acquiring the gradient of a road on which a vehicle is positioned; when the gradient exceeds the set gradient, the motor starts to perform torque clearing operation; acquiring the current speed of the vehicle and a transmission chain gap between the combining sleeve and the gear ring; determining the required time for eliminating the transmission chain gap in the torque clearing process based on the current speed and the transmission chain gap; executing a first gear shifting operation in the required time of the transmission chain clearance until the gear shifting is shifted to a set position, and continuing to clear the torque until the torque is zero; and executing a second gear shifting operation until the current gear shifting position is shifted to the neutral gear position. The gear is picked to the set position in the required time for eliminating the transmission chain gap in the torque clearing process, the reliable adjustment of the gear position can be ensured, and when the second gear picking operation is executed subsequently, the gear position is relatively close to the neutral gear position, so that the acting force of the combining sleeve and the gear ring is relatively reduced, and the success rate of the gear picking is improved.
Drawings
FIG. 1 is a flowchart of an AMT shift-off control method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an AMT shift-off control device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.
In the figure:
100. a shift instruction determination module; 110. a gradient acquisition module; 120. a gradient judging module; 130. the first torque clearing execution power module; 140. a parameter acquisition module; 150. a drive train gap determination module; 160. a first shift-off operation execution module; 170. the second torque clearing execution power module; 180. the second gear-shifting operation executing module;
200. AMT; 210. a driving controller; 220. a gyroscope; 230. a gear sensor; 240. a speed sensor; 250. a memory.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
Noun interpretation
P2 mixing system: the P2 hybrid system is a parallel hybrid system, where P represents the Position of the drive motor in the hybrid system and "2" represents after the internal combustion engine and before the transmission.
AMT: the AMT is an automatic control mechanism additionally provided with an electronic unit under the condition that the basic structure of the original mechanical manual transmission is unchanged, replaces the operations of clutch separation and engagement, gear removal and gear engagement, adjustment of the rotational speeds and torques of an engine and a motor and the like which are manually completed by a driver, and realizes control automation of a gear shifting process. The AMT comprises an input shaft, an output shaft, a combination sleeve connected with the input shaft and a gear ring connected with the output shaft, wherein the input shaft is connected with a motor, the combination sleeve can be meshed with or separated from the gear ring through a cylinder drive, the combination sleeve is provided with a plurality of tooth parts, the gear ring is provided with a plurality of tooth grooves, when the combination sleeve is meshed with the gear ring, the plurality of tooth parts can be spliced with the plurality of tooth grooves in a one-to-one correspondence manner, and at the moment, the input shaft and the output shaft establish a transmission relation.
Examples
The present embodiment provides an AMT shift-off control method, which may be executed by an AMT shift-off control device, and the AMT shift-off control device may be implemented in a software and/or hardware manner and integrated in a vehicle. Wherein, this vehicle specifically adopts P2 hybrid system.
FIG. 1 is a flowchart of an AMT shift-off control method in an embodiment of the invention; specifically, referring to fig. 1, the AMT shift-off control method includes the following steps:
s100: a shift command is determined to be received.
The driving controller can interact with the whole vehicle controller of the vehicle to acquire a gear shifting instruction and a target gear to be hung in. Specifically, when the speed of the vehicle changes greatly, the whole vehicle controller adapts to the gear according to the speed of the vehicle and the corresponding relation of the gear, and at the moment, a gear shifting requirement is generated, a gear shifting instruction is sent out, and the gear to be shifted is the target gear.
S200: the gradient of the road on which the vehicle is located is obtained.
The gradient of the road on which the vehicle is currently located can be obtained through a gyroscope or a GPS.
S300: and judging whether the gradient exceeds the set gradient.
In this embodiment, the set gradient is set to 5 ° by way of example.
If yes, then S400 is performed.
S400: the motor starts to perform the torque clearing operation.
In the whole gear shifting process, the prior art is generally divided into four steps of torque clearing operation, gear shifting operation, speed regulating operation and gear shifting operation, or three steps of torque clearing and gear shifting operation, speed regulating operation and gear shifting operation. The torque clearing operation is the prior art, specifically, the torque of the motor is gradually reduced until zero.
S500: the current speed of the vehicle is obtained, and a transmission chain gap between the combining sleeve and the gear ring is obtained.
The vehicle speed of the vehicle may be detected by a vehicle speed sensor.
The transmission chain gap is the maximum gap between the tooth part of the combining sleeve and the tooth groove of the gear ring after the tooth part of the combining sleeve and the tooth groove of the gear ring are meshed with each other. It will be appreciated that there is some play between the teeth of the coupling sleeve and the teeth slots of the ring gear, the play being such that the coupling sleeve can be engaged with or disengaged from the ring gear. Specifically, for the tooth slot of the gear ring, two opposite groove walls are arranged along the rotation direction of the tooth slot, and for the tooth part of the combining sleeve, two opposite contact surfaces are arranged along the rotation direction of the tooth part, and when one contact surface of the tooth part is contacted with one groove wall of the tooth slot, the gap is zero; at the same time, the other contact surface of the tooth part and the other groove wall of the tooth groove are separated, and the gap reaches the maximum, which is equal to the maximum gap. The transmission chain gap can be set manually according to the specific model of the AMT and pre-stored in the driving controller, and can be detected practically and stored in the driving controller.
S600: and determining the required time for eliminating the transmission chain gap in the torque clearing process based on the current speed and the transmission chain gap.
Specifically, determining the required time to eliminate the drive train gap in the torque purge process based on the current vehicle speed and the drive train gap includes: acquiring the association relation between the current vehicle speed and the transmission chain gap and the demand time; and inquiring corresponding demand time from the association relation based on the acquired current vehicle speed and the transmission chain clearance. The association relation between the current vehicle speed and the transmission chain clearance and the demand time is pre-stored in the driving controller and can be obtained through a large number of tests in the earlier stage.
The P2 hybrid system can provide power in the forward process of the vehicle, but in the gear shifting process of the vehicle, the power can be gradually interrupted in the torque clearing process, and the power can not be continued until the gear is engaged. When the traction torque provided by the P2 hybrid system is larger than the load torque of the vehicle, one contact surface of the tooth part is contacted with one groove wall of the tooth groove, when the traction torque provided by the P2 hybrid system is smaller than the load torque of the vehicle, the reverse dragging phenomenon occurs, the tooth part can rotate relative to the gear ring, the other contact surface of the tooth part is contacted with the other groove wall of the tooth groove, the rotating stroke is the transmission chain gap, and the friction force of the tooth part and the tooth groove is relatively smaller in the process of relative rotation of the tooth part and the tooth groove, so that the successful gear picking can be ensured. In this embodiment, the time starting point of the required time for eliminating the transmission chain gap is the time point when a contact surface of the tooth part and a groove wall of the tooth groove start to separate from contact; the time end of the demand time for eliminating the transmission chain gap is the time point when the other contact surface of the tooth portion and the other groove wall of the tooth groove are in contact. The time starting point of the demand time for eliminating the transmission chain clearance can be determined according to the current gear and the current speed of the vehicle. For example, the corresponding relation between the current gear and the set vehicle speed is stored in the driving controller in advance, the corresponding set vehicle speed can be queried from the corresponding relation between the current gear and the set vehicle speed according to the current gear, and when the current vehicle speed is reduced to be consistent with the set vehicle speed, the time starting point of the required time for eliminating the transmission chain gap is considered.
S700: and executing a first gear shifting operation in the required time of the transmission chain clearance until the gear shifting is shifted to a set position.
Wherein, when the gear is shifted to the setting position, the combining sleeve is meshed with the gear ring.
In this embodiment, when the first gear shift operation, and the second gear shift operation and the third gear shift operation mentioned below are performed, the sliding sleeve is driven by the gear shift cylinder to gradually separate from the ring gear. The set position can be stored in the driving controller in advance, and the position of the current gear can be detected by the gear sensor and compared with the set position to determine whether the current gear is located at the set position.
The time starting point of the first gear shifting operation is consistent with the time starting point of the demand time for eliminating the transmission chain gap in the demand time of the transmission chain gap, but the time ending point of the first gear shifting operation is advanced in advance of the time ending point of the demand time for eliminating the transmission chain gap in the demand time of the transmission chain gap. Because it is an objective reality that the time required to shift to the set position is relatively short compared to the time required for the transmission chain clearance during torque clearing.
If the time end of the first gear shifting operation is executed within the required time of the transmission chain gap, whether the time end of the required time for eliminating the transmission chain gap is advanced or not cannot be determined, the required time can be used as a limit, and if the gear shifting operation is shifted to a set position within the required time, the gear shifting operation is stopped to continue; if the set position is not reached, the continuous gear taking is stopped after the gear taking duration is equal to the required time, so that the position of the current gear has certain uncertainty, but the implementation of the scheme is not influenced.
The setting position may be set as needed, and in this embodiment, the setting position is set as being in the belt.
Specifically, the first gear-off operation is executed within the required time of the transmission chain gap, and the steps until the gear-off is to be at the set position include the following steps:
s701: and executing a first gear-off operation.
S702: the duration is accumulated.
S703: and acquiring the position of the current gear.
S704: and judging whether the position of the current gear is positioned at the set position.
If yes, executing S705; if not, S703 is repeated.
S705: and determining the gear to be shifted to the set position.
S800: the motor continues to torque until the torque is zero.
It should be noted that the total time required for torque removal of the motor is much longer than the above-described time required for eliminating the transmission chain gap.
S900: and executing a second gear shifting operation until the current gear shifting position is shifted to the neutral gear position.
When the first gear-shifting operation is performed, the gear position (specifically, the position of the combining sleeve) moves from the gear position to the neutral gear position, at the moment, the tooth part of the combining sleeve gradually withdraws from the tooth groove of the gear ring, the relative contact area between the tooth part and the gear ring gradually decreases, and when the gear position is set, the tooth part is still partially positioned in the tooth groove. Thus, the force required for the shift-out is also reduced at the time of the second shift-out operation.
The AMT gear-off control method provided by the embodiment determines that a gear shifting instruction is received; acquiring the gradient of a road on which a vehicle is positioned; when the gradient exceeds the set gradient, the motor starts to perform torque clearing operation; acquiring the current speed of the vehicle and a transmission chain gap between the combining sleeve and the gear ring; determining the required time for eliminating the transmission chain gap in the torque clearing process based on the current speed and the transmission chain gap; executing a first gear shifting operation in the required time of the transmission chain clearance until the gear shifting is shifted to a set position, and continuing to clear the torque until the torque is zero; and executing a second gear shifting operation until the current gear shifting position is shifted to the neutral gear position. The gear is picked to the set position in the required time for eliminating the transmission chain gap in the torque clearing process, the reliable adjustment of the gear position can be ensured, and when the second gear picking operation is executed subsequently, the gear position is relatively close to the neutral gear position, so that the acting force of the combining sleeve and the gear ring is relatively reduced, and the success rate of the gear picking is improved.
Optionally, in S300, when it is determined whether the gradient exceeds the set gradient, if the gradient does not exceed the set gradient, S1000 is executed.
S1000: the motor starts to carry out torque clearing operation until the torque is cleared.
S1100: and executing a third gear-off operation until the current gear is in the neutral gear.
When the gradient is not more than the set gradient, the conventional torque clearing and shift removing operations as shown in steps S1000 and S1100 may be performed.
After step S1110 and step S900, a speed adjusting operation and a gear shifting operation are sequentially performed.
Optionally, the AMT shift-off control method further comprises the following steps, at S100, before the shift instruction is determined to be received:
s10: the motor rotates in a first direction when first parked in a drive cycle and stops until the vehicle has evidence of starting.
In S10, it may be indicated that one of the contact surfaces of the tooth portions of the coupling sleeve is in contact with one of the groove walls of the tooth grooves of the ring gear when the vehicle has signs of starting. In this embodiment, determining that the vehicle has signs of launch includes: the vehicle is determined to have signs of start when the vehicle speed of the vehicle exceeds zero, and is determined to have no signs of start when the vehicle speed of the vehicle is equal to zero.
In other embodiments, whether the vehicle has a launch event may also be determined based on whether the vehicle's jerk exceeds a set magnitude.
S20: the motor rotates in a second direction opposite to the first direction and stops until the vehicle has signs of starting, and the rotational speed of the motor at each time point is recorded in real time during the process.
In S20, it may be indicated that the other contact surface of the tooth portion of the coupling sleeve is in contact with the other groove wall of the tooth groove of the ring gear when the vehicle has a sign of starting.
S30: the drive train clearance is determined based on the rotational speed of the motor at each point in time.
The rotating stroke of the motor can be calculated in an integral mode according to the rotating speed of the motor at each time point, and the rotating stroke is used as a transmission chain gap. It should be noted that there is no need to translate the drive train gap into a specific distance of movement of the coupling sleeve. Because only one amount of time is required to be obtained in step S600, which is consistent with the stroke through which the motor rotates.
It should be noted that S10 to S30 may be executed when the vehicle is stopped for the first time in the present driving cycle, and the determined transmission chain gap may be stored in the driving controller, or S10 to S30 may be executed when the vehicle is stopped for the first time in any of the previous driving cycles, and the original transmission chain gap in the driving controller may be replaced with the newly determined transmission chain gap.
Examples
Fig. 2 is a block diagram of an AMT shift-off control device according to a second embodiment of the invention, which is configured to execute the AMT shift-off control method described in the first embodiment.
Specifically, as shown in fig. 3, the AMT shift control device includes a shift instruction determining module 100, a gradient acquiring module 110, a gradient judging module 120, a first torque clearing executing function module 130, a parameter acquiring module 140, a transmission chain clearance determining module 150, a first shift operation executing module 160, a second torque clearing executing function module 170, and a second shift operation executing module 180.
Wherein, the gear shift instruction determining module 100 is configured to determine that a gear shift instruction is received; the gradient acquisition module 110 is used for acquiring the gradient of a road on which the vehicle is located; the gradient determination module 120 is configured to determine whether the gradient exceeds a set gradient; the first torque clearing execution power module 130 is used for enabling the motor to start torque clearing operation when the gradient exceeds a set gradient; the parameter obtaining module 140 is configured to obtain a current vehicle speed and a transmission chain gap between the coupling sleeve and the gear ring, where the transmission chain gap is a maximum gap between the tooth portion of the coupling sleeve and the tooth slot of the gear ring after the tooth portion of the coupling sleeve and the tooth slot of the gear ring are meshed with each other; the transmission chain clearance determining module 150 is used for determining the required time for eliminating the transmission chain clearance in the torque clearing process based on the current vehicle speed and the transmission chain clearance; the first shift operation executing module 160 is configured to execute a first shift operation until a shift is shifted to a set position; the second torque-clearing power module 170 is configured to enable the motor to continue torque clearing until the torque is zero; the second shift operation execution module 180 is configured to execute a second shift operation until the current shift position is shifted to the neutral position.
The AMT shift-out control device provided in this embodiment determines that a shift instruction is received through the shift instruction determining module 100; acquiring the gradient of the road on which the vehicle is located through the gradient acquisition module 110; judging whether the gradient exceeds the set gradient by the gradient judging module 120; when the gradient exceeds the set gradient. The motor starts to perform torque clearing operation through the first torque clearing execution power module 130; the current speed of the vehicle and the transmission chain gap between the combining sleeve and the gear ring are acquired through the parameter acquisition module 140, wherein the transmission chain gap is the maximum gap between the tooth part of the combining sleeve and the tooth groove of the gear ring after the tooth part of the combining sleeve and the tooth groove of the gear ring are meshed with each other; determining, by the drive train gap determination module 150, a required time to eliminate drive train gaps during torque purging based on the current vehicle speed and the drive train gaps; executing a first gear shifting operation by the first gear shifting operation executing module 160 until the gear shifting is shifted to a set position; continuing to torque the motor through the second torque-clearing work-performing module 170 until the torque is zero; the second shift operation is performed by the second shift operation performing module 180 until the current shift position shifts to the neutral position. The gear is picked to the set position in the required time for eliminating the transmission chain gap in the torque clearing process, the reliable adjustment of the gear position can be ensured, and when the second gear picking operation is executed subsequently, the gear position is relatively close to the neutral gear position, so that the acting force of the combining sleeve and the gear ring is relatively reduced, and the success rate of the second gear picking operation is reduced.
Optionally, the AMT shift-off control device further comprises: the device comprises a parking determining module, a first motor executing module, a second motor executing module and a transmission chain clearance determining module. The parking determining module is used for determining first parking in the driving cycle; the first motor execution module is used for enabling the motor to rotate along a first direction when the vehicle is stopped for the first time in the driving cycle, and stopping until the vehicle has a starting sign; the second motor execution module is used for enabling the motor to rotate in a second direction opposite to the first direction until the vehicle has a starting sign, and recording the rotating speed of the motor at each time point in real time in the process; the drive train gap determination module is configured to determine a drive train gap based on a rotational speed of the motor at each point in time.
Examples
Fig. 3 is a structural diagram of a vehicle according to a third embodiment of the present invention. Specifically, referring to fig. 3, the vehicle includes: AMT200, drive controller 210, gyroscope 220, gear sensor 230, speed sensor 240, and memory 250. Among them, the AMT200, the driving controller 210, the gyroscope 220, the gear sensor 230, the speed sensor 240, and the memory 250 may be connected through a bus. The gyroscope 220 is used for acquiring the gradient of the road on which the vehicle is located and sending the acquired gradient to the driving controller 210; the gear sensor 230 is configured to collect a current gear position of the vehicle and send the collected current gear position to the driving controller 210; the speed sensor 240 is used to collect the speed of the vehicle and transmit the collected speed to the driving controller 210.
The memory 250 is used as a computer readable storage medium for storing a software program, a computer executable program, and modules, such as program instructions/modules corresponding to the AMT shift control method in the embodiment of the invention. The driving controller 210 executes various functional applications of the vehicle and data processing by running software programs, instructions and modules stored in the memory 250, that is, implements the AMT off-hook control method of the above embodiment.
The memory 250 mainly includes a memory program area and a memory data area, wherein the memory program area can store an operating system, at least one application program required for functions; the storage data area may store data created according to the use of the terminal, etc. In addition, memory 250 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, the memory 250 may further include memory remotely located with respect to the ride control 210, which may be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The vehicle provided in the third embodiment of the present invention belongs to the same inventive concept as the AMT shift control method provided in the above embodiment, and technical details not described in detail in this embodiment can be seen in the above embodiment, and this embodiment has the same beneficial effects of executing the AMT shift control method.
Examples
The fourth embodiment of the present invention further provides a storage medium having a computer program stored thereon, wherein the vehicle implements the AMT shift off control method according to the above embodiment of the present invention when the program is executed by the driving controller.
Of course, the storage medium containing the computer executable instructions provided by the embodiment of the invention is not limited to the operations in the AMT shift control method, but can also execute the related operations in the AMT shift control method provided by the embodiment of the invention, and has corresponding functions and beneficial effects.
From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, etc., and include several instructions for causing a computer device (which may be a robot, a personal computer, a server, or a network device, etc.) to execute the AMT shift control method according to the embodiments of the present invention.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. An AMT shift-off control method, comprising:
determining that a gear shifting instruction is received;
acquiring the gradient of a road on which a vehicle is positioned;
judging whether the gradient exceeds a set gradient;
if yes, the motor starts to perform torque clearing operation;
acquiring the current speed of a vehicle and a transmission chain gap between a combination sleeve and a gear ring, wherein the transmission chain gap is the maximum gap between a tooth part of the combination sleeve and a tooth groove of the gear ring after the tooth part of the combination sleeve and the tooth groove of the gear ring are meshed with each other;
determining the required time for eliminating the transmission chain gap in the torque clearing process based on the current vehicle speed and the transmission chain gap;
executing a first gear shifting operation in the required time of the transmission chain clearance until the gear shifting is shifted to a set position, wherein the combination sleeve is meshed with the gear ring when the gear shifting is shifted to the set position;
the motor continues to clear torque until the torque is zero;
and executing a second gear shifting operation until the current gear shifting position is shifted to the neutral gear position.
2. The AMT shift control method as defined in claim 1, further comprising the step of, before determining that the shift command is received:
when the vehicle is stopped for the first time in the driving cycle, the motor rotates in a first direction and stops until the vehicle has signs of starting;
the motor rotates in a second direction opposite to the first direction and stops until the vehicle has a sign of starting, and the rotating speed of the motor at each time point is recorded in real time in the process;
the drive train gap is determined based on the rotational speed of the motor at each point in time.
3. The AMT upshift control method according to claim 2, wherein determining that the vehicle has a start sign comprises:
the vehicle is determined to have signs of start when the vehicle speed of the vehicle exceeds zero, and is determined to have no signs of start when the vehicle speed of the vehicle is equal to zero.
4. The AMT shift control method according to claim 1, characterized in that executing a first shift operation in a required time of said transmission chain gap until shift to a set position comprises:
executing a first gear shifting operation;
acquiring the position of the current gear;
judging whether the current gear position is positioned at the set position or not;
if yes, determining gear shifting to the set position; and if not, repeatedly acquiring the position of the current gear.
5. The AMT shift-off control method according to claim 1, characterized in that, when judging whether said gradient exceeds a set gradient, if said gradient does not exceed a set gradient, the AMT shift-off control method further comprises:
the motor starts to carry out torque clearing operation until the torque is cleared;
and executing a third gear-off operation until the current gear is in the neutral gear.
6. The AMT shift-off control method according to claim 1, characterized in that determining a required time to eliminate the transmission chain gap in the torque-clearing process based on the current vehicle speed and the transmission chain gap comprises:
acquiring the association relation between the current vehicle speed and the transmission chain gap and the required time;
and inquiring corresponding demand time from the association relation based on the acquired current vehicle speed and the transmission chain gap.
7. An AMT shift-off control device, comprising:
the gear shifting instruction determining module is used for determining that a gear shifting instruction is received;
the gradient acquisition module is used for acquiring the gradient of the road where the vehicle is located;
the gradient judging module is used for judging whether the gradient exceeds a set gradient;
the first torque clearing execution power module is used for enabling the motor to start torque clearing operation when the gradient exceeds a set gradient;
the parameter acquisition module is used for acquiring the current speed of the vehicle and a transmission chain gap between the combination sleeve and the gear ring, wherein the transmission chain gap is the maximum gap between the tooth part of the combination sleeve and the tooth groove of the gear ring after the tooth part of the combination sleeve and the tooth groove of the gear ring are meshed with each other;
the transmission chain clearance determining module is used for determining the required time for eliminating the transmission chain clearance in the torque clearing process based on the current vehicle speed and the transmission chain clearance;
the first gear-shifting operation executing module is used for executing a first gear-shifting operation until the gear is shifted to a set position, wherein the combining sleeve is meshed with the gear ring when the gear is shifted to the set position;
the second torque clearing execution power module is used for enabling the motor to continue torque clearing until the torque is zero;
and the second gear shifting operation executing module is used for executing the second gear shifting operation until the current gear shifting position is shifted to the neutral gear position.
8. The AMT shift-out control device according to claim 7, further comprising:
the parking determining module is used for determining first parking in a driving cycle;
the first motor execution module is used for enabling the motor to rotate along a first direction when the vehicle is stopped for the first time in a driving cycle and stopping until the vehicle has a starting sign;
the second motor execution module is used for enabling the motor to rotate in a second direction opposite to the first direction, stopping until the vehicle has a starting sign, and recording the rotating speed of the motor at each time point in real time in the process;
and the transmission chain clearance determining module is used for determining the transmission chain clearance based on the rotating speed of the motor at each time point.
9. A vehicle comprising an AMT, the vehicle further comprising:
a driving controller;
the gyroscope is used for collecting the gradient of the road where the vehicle is located and sending the collected gradient to the driving controller;
the gear sensor is used for collecting the position of the current gear of the vehicle and sending the collected position of the current gear to the driving controller;
the speed sensor is used for collecting the speed of the vehicle and sending the collected speed to the driving controller;
a memory for storing one or more programs;
the one or more programs, when executed by the drive controller, cause the drive controller to control a vehicle to implement the AMT off-hook control method of any one of claims 1-6.
10. A storage medium having a computer program stored thereon, wherein the program, when executed by a drive controller, causes a vehicle to implement the AMT off-hook control method as defined in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310820108.4A CN116538289B (en) | 2023-07-06 | 2023-07-06 | AMT gear shift off control method and device, vehicle and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310820108.4A CN116538289B (en) | 2023-07-06 | 2023-07-06 | AMT gear shift off control method and device, vehicle and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116538289A true CN116538289A (en) | 2023-08-04 |
| CN116538289B CN116538289B (en) | 2023-10-20 |
Family
ID=87458233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310820108.4A Active CN116538289B (en) | 2023-07-06 | 2023-07-06 | AMT gear shift off control method and device, vehicle and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116538289B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007100786A (en) * | 2005-10-03 | 2007-04-19 | Jatco Ltd | Control device for automatic transmission |
| JP2014020382A (en) * | 2012-07-12 | 2014-02-03 | Honda Motor Co Ltd | Control device of transmission |
| CN104514878A (en) * | 2014-12-24 | 2015-04-15 | 潍柴动力股份有限公司 | Vehicle gear-shifting control method and TCU (transmission control unit) |
| CN106246902A (en) * | 2016-08-09 | 2016-12-21 | 王大方 | Short distance pure electric automobile no-clutch is without lock unit AMT shift control method |
| CN111677856A (en) * | 2020-06-22 | 2020-09-18 | 潍柴动力股份有限公司 | Method and system for processing gear-off abnormity of vehicle and electronic equipment |
-
2023
- 2023-07-06 CN CN202310820108.4A patent/CN116538289B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007100786A (en) * | 2005-10-03 | 2007-04-19 | Jatco Ltd | Control device for automatic transmission |
| JP2014020382A (en) * | 2012-07-12 | 2014-02-03 | Honda Motor Co Ltd | Control device of transmission |
| CN104514878A (en) * | 2014-12-24 | 2015-04-15 | 潍柴动力股份有限公司 | Vehicle gear-shifting control method and TCU (transmission control unit) |
| CN106246902A (en) * | 2016-08-09 | 2016-12-21 | 王大方 | Short distance pure electric automobile no-clutch is without lock unit AMT shift control method |
| CN111677856A (en) * | 2020-06-22 | 2020-09-18 | 潍柴动力股份有限公司 | Method and system for processing gear-off abnormity of vehicle and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116538289B (en) | 2023-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1273338C (en) | Control of transmission system uisng centrifugal clutch | |
| US7329205B2 (en) | Drive train having a twin-clutch transmission and a method for controlling the same | |
| EP1475266B1 (en) | Control method and system for vehicle | |
| CN110696831B (en) | Gear shifting control method and device for pure electric mode of hybrid electric vehicle | |
| EP2894316B1 (en) | Vehicle travel control device | |
| CN104728424B (en) | Gear-shifting control method in DCT vehicles | |
| EP1429049B1 (en) | Automatic transmission system and automobile using the system | |
| EP2379389B1 (en) | A method and device for controlling disengagement of an automated vehicle master clutch | |
| EP1270301A2 (en) | Power transmission apparatus for automobile | |
| CN103380037B (en) | The speed-change control device of motor vehicle driven by mixed power | |
| CN102192312B (en) | Control device of vehicle drive system | |
| CN106740826A (en) | A kind of engine starting method and device of single-axle parallel hybrid automobile | |
| CN104254469A (en) | Method for operating a drive train of a motor vehicle having a freewheeling engine-off function, control device and motor vehicle | |
| CN102030004B (en) | Control method for realizing hill-start of automatic transmission by utilizing pulse catching | |
| CN103863326B (en) | For the method and system for the knock-on for controlling hybrid electric vehicle | |
| CN1782472A (en) | Controller of composite power vehicle | |
| CN102597565B (en) | Power transmission control device for vehicle | |
| CN105209798A (en) | Shift control device for vehicle | |
| CN110645349B (en) | Double-clutch gear shifting control method, device and equipment for hybrid vehicle | |
| CN110067853B (en) | Vehicle gear shifting method, device and equipment | |
| CN1479837A (en) | Transmission system utilizing centrifugal clutch | |
| KR20120087060A (en) | Method for controlling an automated manual transmission | |
| CN103282254A (en) | Electric vehicle control apparatus | |
| CN105134942A (en) | Gear-shifting control method for driving intention change during kick-down process | |
| CN113291163A (en) | Torque control method and system of automatic transmission automobile and automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |