CN113007341B - Sliding gear sleeve gear shifting control method based on electric gear shifting actuator and vehicle - Google Patents
Sliding gear sleeve gear shifting control method based on electric gear shifting actuator and vehicle Download PDFInfo
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- CN113007341B CN113007341B CN202110470502.0A CN202110470502A CN113007341B CN 113007341 B CN113007341 B CN 113007341B CN 202110470502 A CN202110470502 A CN 202110470502A CN 113007341 B CN113007341 B CN 113007341B
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- 230000005540 biological transmission Effects 0.000 claims description 119
- 230000003139 buffering effect Effects 0.000 claims description 32
- 239000000872 buffer Substances 0.000 claims description 7
- 101150064138 MAP1 gene Proteins 0.000 claims description 6
- 101100075995 Schizosaccharomyces pombe (strain 972 / ATCC 24843) fma2 gene Proteins 0.000 claims description 4
- 101100456045 Schizosaccharomyces pombe (strain 972 / ATCC 24843) map3 gene Proteins 0.000 claims description 4
- 101100400452 Caenorhabditis elegans map-2 gene Proteins 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 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
- F16H61/04—Smoothing ratio shift
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- 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
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
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- 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
- F16H61/68—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 specially adapted for stepped gearings
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- 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
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- 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
- F16H61/04—Smoothing ratio shift
- F16H2061/0462—Smoothing ratio shift by controlling slip rate during gear shift transition
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- 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
- F16H2306/00—Shifting
- F16H2306/40—Shifting activities
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention discloses a sliding gear sleeve gear shifting control method based on an electric gear shifting actuator and a vehicle, and belongs to the technical field of vehicles.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a sliding gear sleeve gear shifting control method based on an electric gear shifting actuator and a vehicle.
Background
In the automobile gear shifting process, the sliding gear sleeve gear shifting mode is taken as an important gear shifting mode and is widely applied to an AMT (automated mechanical transmission). At present, the main box of heavy commercial car AMT mainly adopts the slip tooth cover mode of shifting, but the impact of shifting that matches electronic shift executor and slip tooth cover derailleur is big, and the time of shifting is long, and user experience is relatively poor.
Disclosure of Invention
The invention aims to provide a sliding gear sleeve gear shifting control method based on an electric gear shifting actuator and a vehicle, and aims to solve the problems that in the prior art, the gear shifting impact of matching the electric gear shifting actuator and a sliding gear sleeve transmission is large, the gear shifting time is long, and the user experience is poor.
As the conception, the technical scheme adopted by the invention is as follows:
a sliding gear sleeve gear shifting control method based on an electric gear shifting actuator comprises the following steps:
s1, starting gear shifting, adjusting the gear shifting force to a starting gear shifting force, wherein the starting gear shifting force direction is a positive direction, and the positive direction is a gear entering direction;
s2, judging whether the sliding gear sleeve starts to move from the neutral position, if so, executing S3; if not, keeping the shifting force as the starting shifting force;
s3, adjusting the gear shifting force to a top tooth gear shifting force, wherein the top tooth gear shifting force is in a positive direction, and the top tooth gear shifting force is smaller than the starting gear shifting force;
s4, judging whether the sliding gear sleeve moves to the top gear position, if so, executing S5; if not, keeping the gear shifting force as the top tooth gear shifting force; when the sliding gear sleeve moves to the top tooth position, the top tooth of the sliding gear sleeve is abutted to the spline;
s5, judging whether the sliding gear sleeve starts to move, if so, executing S6; if not, keeping the gear shifting force as the top tooth gear shifting force;
S6, adjusting the gear shifting force to a first gear advancing gear shifting force, wherein the first gear advancing gear shifting force is positive, and the first gear advancing gear shifting force is larger than the top gear shifting force and smaller than the starting gear shifting force;
s7, acquiring and judging whether the movement speed of the sliding gear sleeve starts to be reduced, if so, executing S8; if not, keeping the gear shifting force as the first gear-in gear shifting force;
s8, increasing the gear shifting force at a preset speed on the basis of the first gear advancing and gear shifting force, acquiring and judging whether the movement speed of the sliding gear sleeve starts to increase or not, and if so, executing S9; if not, keeping the gear shifting force to be increased continuously at a preset speed;
s9, adjusting the gear shifting force to a second gear advancing gear shifting force, wherein the direction of the second gear advancing gear shifting force is positive, and the second gear advancing gear shifting force is larger than the first gear advancing gear shifting force;
s10, judging whether the sliding gear sleeve moves to the buffering position or not, if so, executing S11; if not, keeping the gear shifting force as a second gear advancing gear shifting force;
the controller is internally pre-stored with a map1 of the relationship among the moving speed of the sliding gear sleeve, the current oil temperature of the transmission, the target gear and the current input shaft rotating speed and the buffer position after the gear shifting force is adjusted to the second gear-entering gear shifting force, and inquires the buffer position corresponding to the current moving speed, the current oil temperature of the transmission, the target gear and the current input shaft rotating speed of the sliding gear sleeve according to the map 1;
S11, adjusting the gear shifting force to a buffering gear shifting force, wherein the buffering gear shifting force is smaller than the top tooth gear shifting force, and the direction of the buffering gear shifting force is reverse;
s12, judging whether the sliding gear sleeve moves to a gear shifting in-place position or not, if so, adjusting the gear shifting force to a locking gear shifting force, keeping the preset time and then reducing the force to zero, wherein the locking gear shifting force is smaller than the gear shifting force of the top gear, and the direction of the locking gear shifting force is positive; if not, the gear shifting force is kept as the buffering gear shifting force.
Further, in S1, before adjusting the shift force to the starting shift force, the method further includes: determining a magnitude of a starting shift force, the determining a magnitude of a starting shift force comprising
Acquiring the current oil temperature of the transmission;
the controller is prestored with a map2 of the relation between the oil temperature of the transmission and the starting gear shifting force, and inquires the starting gear shifting force corresponding to the current oil temperature of the transmission according to the map 2.
Further, in S3, before adjusting the shifting force to the top-tooth shifting force, the method further comprises: determining a magnitude of a top-tooth shifting force, the determining a magnitude of a top-tooth shifting force comprising:
acquiring the current transmission oil temperature;
the controller is pre-stored with a map3 of the relationship between the oil temperature of the transmission and the gear shifting force of the top teeth, and inquires the gear shifting force of the top teeth corresponding to the current oil temperature of the transmission according to the map 3.
Further, at S6, before adjusting the shifting force to the first advancing gear shifting force, the method further includes: determining a magnitude of a first in-gear shifting force, the determining the magnitude of the first in-gear shifting force comprising:
acquiring a current oil temperature of a transmission, a current rotation speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a map4 of the relationship between the transmission oil temperature, the transmission input shaft rotating speed and the target gear and the first gear-entering shifting force, and inquires the first gear-entering shifting force corresponding to the current transmission oil temperature, the current transmission input shaft rotating speed and the target gear according to the map 4.
Further, in S8, before the shift force is increased at the preset rate on the basis of the first advancing gear shift force, the method further includes: determining a preset rate, wherein the determining the preset rate comprises:
acquiring the current oil temperature of the transmission, the current rotating speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a map5 of the relationship among the oil temperature of the transmission, the rotating speed of the input shaft of the transmission, the target gear and the preset speed, and inquires the preset speed corresponding to the current oil temperature of the transmission, the rotating speed of the input shaft of the transmission and the target gear according to the map 5.
Further, in S9, before adjusting the shift force to the second advancing gear shift force, the method further includes: determining a magnitude of a second advancing shift force, the determining the magnitude of the second advancing shift force comprising:
Acquiring a current oil temperature of a transmission, a current rotation speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a map6 of the relationship between the transmission oil temperature, the transmission input shaft rotating speed and the target gear and the second gear-entering shifting force, and inquires the second gear-entering shifting force corresponding to the current transmission oil temperature, the current transmission input shaft rotating speed and the target gear according to the map 6.
Further, at S11, before adjusting the shift force to the buff shift force at S11, the method further comprises: determining a magnitude of a cushioned shift force, the determining a magnitude of a cushioned shift force comprising:
acquiring the current oil temperature of the transmission, the current rotating speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a relation map7 of the transmission oil temperature, the transmission input shaft rotating speed, the moving speed of the sliding gear sleeve at the buffering position and the target gear and the buffering gear-shifting force, and inquires the buffering gear-shifting force corresponding to the current transmission oil temperature, the current transmission input shaft rotating speed, the moving speed of the sliding gear sleeve at the buffering position and the target gear according to the map 7.
Further, in S12, before adjusting the shift force to the lock-up shift force, the method further includes: determining a magnitude of a lock-up shift force, the determining a magnitude of a lock-up shift force comprising:
Acquiring the current oil temperature and the target gear of the transmission;
the controller is prestored with a map8 of the relation between the oil temperature of the transmission and the target gear and the lock-up shifting force, and inquires the lock-up shifting force corresponding to the current oil temperature of the transmission and the target gear according to the map 8.
Further, in S7, the acquiring and judging whether the sliding sleeve movement speed starts to decrease includes:
acquiring speeds V1 and V2 of the sliding gear sleeve before and after a preset time interval;
comparing V1 with V2, if V1 is larger than V2, determining that the movement speed of the sliding gear sleeve starts to be reduced; if V1 is equal to or less than V2, it is determined that the speed of movement of the sliding sleeve does not start to decrease.
In order to achieve the purpose, the invention further provides a vehicle, and the sliding gear sleeve gear shifting control method based on the electric gear shifting actuator in any scheme is adopted to carry out gear shifting control.
The beneficial effects of the invention are as follows:
according to the sliding gear sleeve gear shifting control method based on the electric gear shifting actuator and the vehicle, the gear shifting force is controlled in a segmented mode, gear shifting can be completed quickly, buffering is performed before gear shifting is finished, the movement speed of the sliding gear sleeve is reduced when gear shifting is finished, buffering impact is reduced, and gear shifting time is shortened.
Drawings
FIG. 1 is a flow chart of a sliding sleeve gear shifting control method based on an electric shift actuator according to the present invention;
FIG. 2 is a timing diagram of a shift control in a sliding sleeve gear shift control method based on an electric shift actuator according to the present invention.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element 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" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1, the present embodiment provides a sliding sleeve gear shifting control method based on an electric gear shifting actuator, which includes:
and S1, starting gear shifting, adjusting the gear shifting force to the starting gear shifting force, wherein the starting gear shifting force direction is a positive direction, and the positive direction is a gear shifting direction.
In S1, before adjusting the shift force to the starting shift force, the method further includes: the magnitude of the starting shift force is determined. In the present embodiment, the start-shift force is determined by the transmission oil temperature, and specifically, determining the magnitude of the start-shift force includes:
acquiring the current oil temperature of the transmission;
the controller is prestored with a map2 of the relation between the oil temperature of the transmission and the starting gear shifting force, and inquires the starting gear shifting force corresponding to the current oil temperature of the transmission according to the map 2.
The current transmission oil temperature can be obtained by a temperature detection element such as a temperature sensor arranged on the transmission. The map2 can be obtained through a large number of experiments in the previous period.
S2, judging whether the sliding gear sleeve starts to move from the neutral position or not, if so, executing S3; if not, keeping the shifting force as the starting shifting force;
and S3, adjusting the gear shifting force to the top tooth gear shifting force, wherein the top tooth gear shifting force direction is positive, and the top tooth gear shifting force is smaller than the starting gear shifting force.
At S3, before adjusting the shifting force to the top-tooth shifting force, the method further comprises: and determining the magnitude of the gear shifting force of the top gear. It should be noted that, in the present embodiment, the top-tooth shifting force is determined by the transmission oil temperature, specifically, determining the size of the top-tooth shifting force includes:
acquiring the current transmission oil temperature;
the controller is pre-stored with a map3 of the relationship between the transmission oil temperature and the top tooth shifting force, and inquires the top tooth shifting force corresponding to the current transmission oil temperature according to the map 3. map3 can be obtained at a previous stage through a large number of experiments.
S4, judging whether the sliding gear sleeve moves to the top gear position, if so, executing S5; if not, the gear shifting force is kept to be the gear shifting force of the top teeth.
When the sliding gear sleeve moves to the top tooth position, the top tooth of the sliding gear sleeve abuts against the spline, and the sliding gear sleeve stops moving axially.
S5, judging whether the sliding gear sleeve starts to move, if so, executing S6; if not, the gear shifting force is kept to be the gear shifting force of the top teeth.
Specifically, whether the sliding gear sleeve starts to move or not can be judged by detecting the speed of the sliding gear sleeve in real time, when the speed of the sliding gear sleeve is zero, the sliding gear sleeve is indicated to be not moved, and if the speed of the sliding gear sleeve is not zero, the sliding gear sleeve starts to move.
And S6, adjusting the gear shifting force to a first gear advancing gear shifting force, wherein the first gear advancing gear shifting force is positive, and the first gear advancing gear shifting force is larger than the top gear shifting force and smaller than the starting gear shifting force.
It should be noted that, in the present embodiment, the first inching shift force is determined by the transmission oil temperature, the transmission input shaft rotation speed and the target gear, and specifically, the determination of the first inching shift force includes:
acquiring the current oil temperature of the transmission, the current rotating speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a map4 of the relationship between the transmission oil temperature, the transmission input shaft rotating speed and the target gear and the first gear-entering shifting force, and inquires the first gear-entering shifting force corresponding to the current transmission oil temperature, the current transmission input shaft rotating speed and the target gear according to the map 4.
S7, acquiring and judging whether the movement speed of the sliding gear sleeve starts to be reduced, if so, executing S8; if not, the gear shifting force is kept to be the first gear shifting force.
Specifically, the determination as to whether the moving speed of the sliding sleeve starts to decrease may be made by the speeds V1 and V2 before and after a preset time interval, which may be set according to actual needs. Specifically, the method comprises the following steps:
acquiring speeds V1 and V2 of the sliding gear sleeve before and after a preset time interval;
Comparing the V1 with the V2, if the V1 is larger than the V2, determining that the movement speed of the sliding gear sleeve starts to be reduced; if V1 is equal to or less than V2, it is determined that the speed of movement of the sliding sleeve does not start to decrease.
S8, increasing the gear shifting force at a preset speed on the basis of the first gear advancing and gear shifting force, acquiring and judging whether the movement speed of the sliding gear sleeve starts to increase or not, and if so, executing S9; if not, the shift force is kept increasing at the preset rate.
At S8, before the shift force is increased at the preset rate based on the first in-gear shift force, the method further includes: the magnitude of the preset rate is determined. It should be noted that, in the present embodiment, the preset speed is determined by the transmission oil temperature, the transmission input shaft rotation speed, and the target gear. Specifically, determining the magnitude of the preset rate includes:
acquiring the current oil temperature of the transmission, the current rotating speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a map5 of the relationship among the oil temperature of the transmission, the rotating speed of the input shaft of the transmission, the target gear and the preset speed, and inquires the preset speed corresponding to the current oil temperature of the transmission, the rotating speed of the input shaft of the transmission and the target gear according to the map 5. map5 can be obtained by a large number of experiments in the early days.
Further, whether or not the moving speed of the sliding sleeve starts to increase may be determined by the speeds V3 and V4 before and after a preset time interval, and if V3 is smaller than V4, it indicates that the moving speed of the sliding sleeve starts to increase, and if V3 is equal to or larger than V4, it indicates that the moving speed of the sliding sleeve does not start to increase.
And S9, adjusting the gear shifting force to a second gear advancing gear shifting force, wherein the direction of the second gear advancing gear shifting force is positive, and the second gear advancing gear shifting force is larger than the first gear advancing gear shifting force.
At S9, before adjusting the shift force to the second advancing shift force, the method further includes: and determining the magnitude of the second gear-in shifting force. It should be noted that the second entering gear shifting force is determined by the transmission oil temperature, the transmission input shaft rotating speed and the target gear, and specifically, determining the magnitude of the second entering gear shifting force includes:
acquiring the current oil temperature of the transmission, the current rotating speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a map6 of the relationship between the transmission oil temperature, the transmission input shaft rotating speed and the target gear and the second gear-entering shifting force, and inquires the second gear-entering shifting force corresponding to the current transmission oil temperature, the current transmission input shaft rotating speed and the target gear according to the map 6. map6 can be obtained by a large number of experiments in the early days.
Further, it is noted that in S8, the shift force is increased at the preset rate based on the first advancing shift force to finally reach the third advancing shift force, which is larger than the second advancing shift force, before executing S9.
S10, judging whether the sliding gear sleeve moves to the buffering position, if so, executing S11; if not, keeping the gear shifting force as a second gear advancing gear shifting force;
the controller is internally pre-stored with a map1 of the relationship between the moving speed of the sliding gear sleeve, the current oil temperature of the transmission, the target gear and the current input shaft rotating speed and the buffer position after the gear shifting force is adjusted to the second gear-entering gear shifting force, and inquires the buffer position corresponding to the current moving speed of the sliding gear sleeve, the current oil temperature of the transmission, the target gear and the current input shaft rotating speed according to the map 1.
And S11, adjusting the gear shifting force to a buffering gear shifting force, wherein the buffering gear shifting force is smaller than the top tooth gear shifting force, and the direction of the buffering gear shifting force is opposite.
At S11, before adjusting the shift force to the cushion shift force, the method further includes: the magnitude of the buff shift force is determined. It should be noted that, in the present embodiment, the buffering shift force is determined by the transmission oil temperature, the transmission input shaft and the target gear, and specifically, determining the magnitude of the buffering shift force includes:
Acquiring the current oil temperature of the transmission, the current rotating speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a relation map7 of the transmission oil temperature, the transmission input shaft rotating speed, the moving speed of the sliding gear sleeve at the buffering position and the target gear and the buffering gear-shifting force, and inquires the buffering gear-shifting force corresponding to the current transmission oil temperature, the current transmission input shaft rotating speed, the moving speed of the sliding gear sleeve at the buffering position and the target gear according to the map 7. The map7 can be obtained by a large number of experiments in the early period.
S12, judging whether the sliding gear sleeve moves to a gear shifting in-place position or not, if so, adjusting the gear shifting force to a locking gear shifting force, keeping the preset time and then reducing the force to zero, wherein the locking gear shifting force is smaller than the gear shifting force of the top gear, and the direction of the locking gear shifting force is positive; if not, the gear shifting force is kept as the buffering gear shifting force.
At S12, before adjusting the shift force to the lock-up shift force, the method further includes: the magnitude of the lockup shifting force is determined. It should be noted that, in the present embodiment, the lockup shift force is determined by the transmission oil temperature and the target gear, and specifically, determining the magnitude of the lockup shift force includes:
acquiring the current oil temperature and the target gear of the transmission;
The controller is prestored with a map8 of the relation between the oil temperature of the transmission and the target gear and the lock-up shifting force, and inquires the lock-up shifting force corresponding to the current oil temperature of the transmission and the target gear according to the map 8. The map8 can be obtained by a large number of previous experiments.
In addition, it should be noted that the shift-to-position is a mechanical limit position of the sliding gear sleeve. In particular, the shift-into-position is determined by the target gear, that is to say the shift-into-position is different for different target gears.
Referring again to fig. 2, the sliding sleeve gear shift process is divided into a start phase (a-B), an idle stroke elimination phase (B-C), a top tooth phase (C-D), a first fast forward tooth phase (D-E), a slow forward tooth phase (E-F), a second fast forward tooth phase (F-G), a cushion phase (G-H), and a lock-up phase (H-I).
Specifically, the start phase (a-B) is a process from the start of shifting to the start of movement of the sliding sleeve, during which the shifting force is maintained as the starting shifting force. The idle stroke elimination stage (B-C) is a process from the beginning of the movement of the sliding gear sleeve to the top gear position, and in the process, the gear shifting force is kept to be the top gear shifting force. And the top tooth stage (C-D) is a process from the sliding gear sleeve moving to the top tooth position to the sliding gear sleeve starting to move again, the sliding gear sleeve position is kept unchanged at the top tooth position in the top tooth stage (C-D), and the gear shifting force is kept as the top tooth gear shifting force. The first fast-forward gear stage (D-E) is a process in which the sliding gear sleeve starts to move from the top gear position to the movement speed of the sliding gear sleeve starts to decrease, and in the process, the gear shifting force is kept as the first fast-forward gear shifting force. Specifically, the sliding gear sleeve is fixed at the top tooth holding position, the top tooth of the sliding gear sleeve is abutted to the spline at the moment, the sliding gear sleeve cannot move axially, and after the spline of the sliding gear sleeve rotates a certain angle relatively, the sliding gear sleeve starts to move, but after the sliding gear sleeve moves for a period of time, the moving speed of the sliding gear sleeve is reduced. The slow advancing stage (E-F) is a process in which the moving speed of the sliding sleeve starts to decrease until the moving speed of the sliding sleeve starts to increase, and in this process, the shifting force is gradually increased at a preset speed on the basis of the first advancing shifting force. The second fast-forward stage (F-G) refers to a process in which the moving speed of the sliding sleeve gear starts to increase until the sliding sleeve gear moves to the damping position, during which the shifting force is maintained at the second fast-forward shifting force. The damping phase (G-H) refers to the movement of the sliding sleeve gear into the damping position to the movement of the sliding sleeve gear into the shift-into-position, during which the shifting force remains as a damping shifting force. The locking phase (H-I) refers to a process in which the shifting force remains the locking shifting force for a preset time after the sliding sleeve has moved to the shift-to-position.
In summary, the sliding gear sleeve gear shifting control method based on the electric gear shifting actuator provided by the embodiment controls the gear shifting force in a segmented manner, can quickly complete gear shifting work, and buffers before gear shifting is finished, so that the movement speed of the sliding gear sleeve at the end of gear shifting is reduced, the buffering impact is reduced, and the gear shifting time is reduced.
The embodiment also provides a vehicle, and the sliding gear sleeve gear shifting control method based on the electric gear shifting actuator is adopted for gear shifting control.
The foregoing embodiments are merely illustrative of the principles and features of this invention, and the invention is not limited to the embodiments described above, but rather, is susceptible to various changes and modifications without departing from the spirit and scope of the invention, as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A sliding gear sleeve gear shifting control method based on an electric gear shifting actuator is characterized by comprising the following steps:
s1, starting gear shifting, adjusting the gear shifting force to the starting gear shifting force, wherein the starting gear shifting force direction is a positive direction, and the positive direction is a gear shifting direction;
s2, judging whether the sliding gear sleeve starts to move from the neutral position or not, if so, executing S3; if not, keeping the shifting force as the starting shifting force;
S3, adjusting the gear shifting force to a top tooth gear shifting force, wherein the top tooth gear shifting force is in a positive direction, and the top tooth gear shifting force is smaller than the starting gear shifting force;
s4, judging whether the sliding gear sleeve moves to the top gear position, if so, executing S5; if not, keeping the gear shifting force as the top gear shifting force; when the sliding gear sleeve moves to the top tooth position, the top tooth of the sliding gear sleeve is abutted to the spline;
s5, judging whether the sliding gear sleeve starts to move, if so, executing S6; if not, keeping the gear shifting force as the top tooth gear shifting force;
s6, adjusting the gear shifting force to a first gear advancing gear shifting force, wherein the first gear advancing gear shifting force is positive, and the first gear advancing gear shifting force is larger than the top gear shifting force and smaller than the starting gear shifting force;
s7, acquiring and judging whether the movement speed of the sliding gear sleeve starts to be reduced or not, if so, executing S8; if not, keeping the gear shifting force as the first gear entering gear shifting force;
s8, increasing the gear shifting force at a preset speed on the basis of the first gear advancing and gear shifting force, acquiring and judging whether the movement speed of the sliding gear sleeve starts to increase or not, and if so, executing S9; if not, keeping the gear shifting force to be continuously increased at a preset speed;
s9, adjusting the gear shifting force to a second gear advancing gear shifting force, wherein the direction of the second gear advancing gear shifting force is positive, and the second gear advancing gear shifting force is larger than the first gear advancing gear shifting force;
S10, judging whether the sliding gear sleeve moves to the buffering position, if so, executing S11; if not, keeping the gear shifting force as a second gear advancing gear shifting force;
the controller is internally pre-stored with a map1 of the relationship among the moving speed of the sliding gear sleeve, the current oil temperature of the transmission, the target gear and the current input shaft rotating speed and the buffer position after the gear shifting force is adjusted to the second gear-entering gear shifting force, and inquires the buffer position corresponding to the current moving speed, the current oil temperature of the transmission, the target gear and the current input shaft rotating speed of the sliding gear sleeve according to the map 1;
s11, adjusting the gear shifting force to a buffering gear shifting force, wherein the buffering gear shifting force is smaller than the top tooth gear shifting force, and the direction of the buffering gear shifting force is opposite;
s12, judging whether the sliding gear sleeve moves to a gear shifting in-place position, if so, adjusting the gear shifting force to a locking gear shifting force, keeping the preset time and then reducing the force to zero, wherein the locking gear shifting force is smaller than the top gear shifting force, and the direction of the locking gear shifting force is positive; if not, the gear shifting force is kept as the buffering gear shifting force.
2. The electric shift actuator based sliding sleeve gear shift control method of claim 1 further including, at S1, prior to adjusting the shift force to the starting shift force: determining a magnitude of a startup shift force, the determining a magnitude of a startup shift force comprising:
Acquiring the current oil temperature of the transmission;
the controller is prestored with a map2 of the relation between the oil temperature of the transmission and the starting gear shifting force, and the controller inquires the starting gear shifting force corresponding to the current oil temperature of the transmission according to the map 2.
3. The electric shift actuator based sliding sleeve gear shift control method of claim 1 further including, at S3, prior to adjusting the shift force to the top tooth shift force: determining a magnitude of a top tooth shifting force, the determining a magnitude of a top tooth shifting force comprising:
acquiring the current oil temperature of the transmission;
the controller is pre-stored with a map3 of the relationship between the oil temperature of the transmission and the gear shifting force of the top teeth, and inquires the gear shifting force of the top teeth corresponding to the current oil temperature of the transmission according to the map 3.
4. The electric shift actuator based sliding sleeve gear control method of claim 1 further including, at S6, prior to adjusting the shift force to the first entering gear shift force: determining a magnitude of a first in-gear shifting force, the determining the magnitude of the first in-gear shifting force comprising:
acquiring the current oil temperature of the transmission, the current rotating speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a map4 of the relationship between the transmission oil temperature, the transmission input shaft rotating speed and the target gear and the first gear-entering shifting force, and inquires the first gear-entering shifting force corresponding to the current transmission oil temperature, the current transmission input shaft rotating speed and the target gear according to the map 4.
5. The electric shift actuator based sliding sleeve gear shift control method of claim 1, further comprising, at S8, before the shift force is increased at a preset rate based on the first entering gear shift force: determining a preset rate, wherein the determining the preset rate comprises:
acquiring a current oil temperature of a transmission, a current rotation speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a map5 of the relationship between the oil temperature of the transmission, the rotating speed of the input shaft of the transmission, the target gear and the preset speed, and inquires the preset speed corresponding to the current oil temperature of the transmission, the rotating speed of the input shaft of the transmission and the target gear according to the map 5.
6. The electric shift actuator based sliding sleeve gear shift control method of claim 1 further including, prior to adjusting the shift force to the second entering gear shift force at S9: determining a magnitude of a second in-gear shifting force, the determining the magnitude of the second in-gear shifting force comprising:
acquiring a current oil temperature of a transmission, a current rotation speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a map6 of the relationship between the transmission oil temperature, the transmission input shaft rotating speed and the target gear and the second gear-entering shifting force, and inquires the second gear-entering shifting force corresponding to the current transmission oil temperature, the current transmission input shaft rotating speed and the target gear according to the map 6.
7. The electric shift actuator based sliding sleeve gear shift control method of claim 1, further comprising, at S11, prior to adjusting the shift force to the buff shift force: determining a magnitude of a buff shift force, the determining a magnitude of a buff shift force comprising:
acquiring a current oil temperature of a transmission, a current rotation speed of an input shaft of the transmission and a target gear;
the controller is pre-stored with a relation map7 of the transmission oil temperature, the transmission input shaft rotating speed, the moving speed of the sliding gear sleeve at the buffering position and the target gear and the buffering gear-shifting force, and inquires the buffering gear-shifting force corresponding to the current transmission oil temperature, the current transmission input shaft rotating speed, the moving speed of the sliding gear sleeve at the buffering position and the target gear according to the map 7.
8. The electric shift actuator based sliding sleeve gear shift control method of claim 1, further comprising, prior to adjusting the shift force to the lockup shift force at S12: determining a magnitude of a lock-up shift force, the determining a magnitude of a lock-up shift force comprising:
acquiring the current oil temperature and the target gear of the transmission;
the controller is prestored with a map8 of the relation between the oil temperature of the transmission and the target gear and the lock-up shifting force, and inquires the lock-up shifting force corresponding to the current oil temperature of the transmission and the target gear according to the map 8.
9. The electric shift actuator-based sliding sleeve shift control method of claim 1, wherein acquiring and determining whether the sliding sleeve movement speed begins to decrease at S7 includes:
acquiring speeds V1 and V2 of the sliding gear sleeve before and after a preset time interval;
comparing the V1 with the V2, if the V1 is larger than the V2, determining that the movement speed of the sliding gear sleeve starts to be reduced; if V1 is equal to or less than V2, it is determined that the moving speed of the sliding sleeve does not start to decrease.
10. A vehicle characterized by a shift control using the sliding sleeve gear shift control method based on an electric shift actuator according to any one of claims 1 to 9.
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| CN114412987B (en) * | 2022-01-24 | 2023-03-17 | 一汽解放汽车有限公司 | Sliding gear sleeve gear-in control method and transmission |
| CN114439927B (en) * | 2022-02-17 | 2023-05-30 | 一汽解放汽车有限公司 | Synchronizer gear shifting control method based on electric actuator |
| CN114483945B (en) * | 2022-02-17 | 2023-06-09 | 一汽解放汽车有限公司 | AMT dynamic gear shifting control method for pure electric vehicle |
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