CN108099895B - method and device for controlling gear shifting strategy of AMT - Google Patents
method and device for controlling gear shifting strategy of AMT Download PDFInfo
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- CN108099895B CN108099895B CN201711346062.8A CN201711346062A CN108099895B CN 108099895 B CN108099895 B CN 108099895B CN 201711346062 A CN201711346062 A CN 201711346062A CN 108099895 B CN108099895 B CN 108099895B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
- B60W10/11—Stepped gearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/19—Improvement of gear change, e.g. by synchronisation or smoothing gear shift
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
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Abstract
the invention discloses a method and a device for controlling a gear shifting strategy of an AMT (automated mechanical transmission), which are used for storing accelerator opening data, analyzing the running state of a vehicle according to the accelerator opening ratio, updating the existing gear shifting strategy according to the actual vehicle use condition, enabling an engine to work in a reasonable interval and fully meeting the actual driving condition of the vehicle and the power demand of a driver.
Description
Technical Field
the invention relates to the technical field of Automated Mechanical Transmission (AMT), in particular to a method and a device for controlling a gear shifting strategy of an AMT.
Background
AMT is short for electric control mechanical automatic gearbox, which is an automatic speed changing system with microcomputer control on the basis of dry clutch and gear speed changer.
At present, the gear shifting strategies of the AMT are dynamic type, economic type, comprehensive type and the like. The vehicle weight, the road environment and the driving intention can be identified, and different gear shifting strategies can be selected under the conditions of ramps, curves, braking and the like. However, these shift strategies are all fixed strategies that are set when the vehicle leaves the factory; the difference between the actual use working condition and the driving road condition of the vehicle is large, and the driving habit of the driver is large, so that the fixed gear shifting control strategy cannot meet the actual driving working condition of the vehicle and the power demand of the driver easily.
Disclosure of Invention
In view of this, the present invention provides a method and a device for controlling a shift strategy of an AMT, in order to achieve the purpose of fully satisfying the actual driving condition of a vehicle and the power demand of a driver.
in order to achieve the above object, the following solutions are proposed:
A method of controlling a shift strategy of an AMT, comprising:
when the engine is in an opening state and the accelerator opening is larger than zero, starting to read and store the accelerator opening value at preset time intervals;
Judging whether the number of the stored throttle opening values is equal to a preset number threshold value or not;
if the stored number of the accelerator opening values is equal to a preset number threshold value, counting whether the ratio of the number of the accelerator opening values in a preset first accelerator opening range to the number threshold value is larger than a preset first ratio or not, if so, reducing the speed of the gear downshift, and if not, counting whether the ratio of the number of the accelerator opening values in a preset second accelerator opening range to the number threshold value is larger than a preset second ratio or not;
and if the ratio of the number of the accelerator opening values in the preset second accelerator opening range to the number threshold value is larger than a preset second ratio, the gear upshift speed is increased, and the maximum value of the second accelerator opening range is smaller than the minimum value of the first accelerator opening range.
preferably, before the step of counting whether the ratio of the number of the accelerator opening values within the preset first accelerator opening range to the number threshold is greater than a preset first ratio, the method further includes:
Counting whether the ratio of the number of the accelerator opening values in the preset third opening range to the number threshold is larger than a preset third ratio, if so, executing the step of counting whether the ratio of the number of the accelerator opening values in the preset first accelerator opening range to the number threshold is larger than the preset first ratio, wherein the maximum value of the third opening range is smaller than the minimum value of the first accelerator opening range, and the minimum value of the third opening range is larger than the maximum value of the second accelerator opening range.
Preferably, the reducing the downshift vehicle speed specifically includes:
Calculating a new downshift strategy through a first formula and replacing the original downshift strategy, wherein the first formula is as follows:
Wherein V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, and P2 is the ratio of the number of accelerator opening values in the third opening range to the number threshold.
preferably, the increasing the gear upshift vehicle speed specifically includes:
and calculating a new gear-up strategy and replacing the original gear-up strategy by a second formula, wherein the second formula is as follows:
And V4 is a new upshift speed, V3 is an original upshift speed, V0 is a lowest shift speed, B3 is the third ratio, and P2 is the ratio of the number of throttle opening values in the third opening degree range to the number threshold.
A control arrangement for a gear shifting strategy of an AMT, comprising:
the data acquisition and storage unit is used for starting to read and store the opening degree value of the accelerator at preset time intervals when the engine is in an opening state and the opening degree of the accelerator is greater than zero;
The first judging unit is used for judging whether the number of the stored throttle opening values is equal to a preset number threshold value or not, and if so, the second judging unit is executed;
The second judging unit is used for counting whether the ratio of the number of the accelerator opening values in the preset first accelerator opening range to the number threshold is larger than a preset first ratio or not, if so, executing the first gear shifting strategy updating unit, and if not, executing the third judging unit;
the first gear shifting strategy updating unit is used for reducing the gear downshift vehicle speed;
The third judging unit is used for counting whether the ratio of the number of the accelerator opening values within a preset second accelerator opening range to the number threshold is larger than a preset second ratio or not, and if so, executing a second gear shifting strategy updating unit;
And the second gear shifting strategy updating unit is used for increasing the gear upshift vehicle speed, and the maximum value of the second accelerator opening range is smaller than the minimum value of the first accelerator opening range.
preferably, the apparatus further comprises:
a fourth judging unit, configured to count whether a ratio of the number of the accelerator opening values within a preset third opening range to the number threshold is greater than a preset third ratio before executing the second judging unit, if so, executing the second judging unit, where a maximum value of the third opening range is smaller than a minimum value of the first accelerator opening range, and a minimum value of the third opening range is greater than a maximum value of the second accelerator opening range.
Preferably, the first shift strategy updating unit is specifically configured to:
calculating a new downshift strategy through a first formula and replacing the original downshift strategy, wherein the first formula is as follows:
Wherein V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, and P2 is the ratio of the number of accelerator opening values in the third opening range to the number threshold.
Preferably, the second shift strategy updating unit is specifically configured to:
and calculating a new gear-up strategy and replacing the original gear-up strategy by a second formula, wherein the second formula is as follows:
Wherein V4 is a new upshift speed, V3 is an original upshift speed, V0 is a lowest shift speed, B3 is the third ratio, and P2 is a ratio of the number of throttle opening values in the third opening degree range to the number threshold value
compared with the prior art, the technical scheme of the invention has the following advantages:
according to the technical scheme, the method and the device for controlling the gear shifting strategy of the AMT store accelerator opening data, analyze the vehicle running state through the accelerator opening ratio, update the existing gear shifting strategy according to the actual vehicle use condition, further enable the engine to work in a reasonable interval, and fully meet the actual vehicle running condition and the power demand of a driver.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
fig. 1 is a flowchart of a method for controlling a shift strategy of an AMT according to an embodiment of the present invention;
FIG. 2 is a flowchart of another method for controlling a shift schedule of an AMT according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of an upshift schedule in a shift control schedule of an AMT;
fig. 4 is a schematic structural diagram of a control device of a gear shifting strategy of an AMT according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a control device for a gear shifting strategy of an AMT according to an embodiment of the present invention.
Detailed Description
The conventional fixed gear shifting control strategy is difficult to meet the actual running condition of a vehicle and the power requirement of a driver, and the control method of the AMT gear shifting strategy provided by the invention analyzes the running state of the vehicle in the recent period of time through historical accelerator opening data, calculates and optimizes the gear shifting control strategy more suitable for the vehicle, and updates the gear shifting control strategy in real time, thereby improving the satisfaction degree of a user on the power performance and the subsequent consumption.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
example one
The present embodiment provides a method for controlling a shift schedule of an AMT, referring to fig. 1, the method may include:
step S11: when the engine is in an opening state and the accelerator opening is larger than zero, the accelerator opening value is read and stored every preset time.
Specifically, when the engine is in an open state and the throttle opening is greater than zero, the throttle opening value is read once every second, counting is carried out, and the read throttle opening value is stored in a memory of the controller.
Step S12: and judging whether the number N1 of the stored throttle opening values is equal to a preset number threshold value N0, if so, executing a step S13.
When the number N1 of the stored throttle opening values is too small, there is no guiding meaning for updating the gear shifting strategy, so that the subsequent steps are only performed if the number N1 of the stored throttle opening values exceeds the preset number threshold N0.
Step S13: counting whether the ratio of the number N11 of the accelerator opening values in the preset first accelerator opening range to the number threshold N0 is larger than a preset first ratio B1, if so, executing a step S14, and if not, executing the step S15.
Step S14: and reducing the downshift vehicle speed of the gear.
the intention and the demand of the driver are judged according to the accelerator opening ratio. When the driver often needs strong power and the vehicle is lack of power, the large throttle opening ratio is high. A first throttle opening range, namely a large throttle opening range, is preset. The lower the gearbox gear, the stronger the power. Through reducing the downshift speed of a motor vehicle of each gear, can realize that the vehicle works more at lower gear, promote dynamic property, satisfy driver's stronger power demand, also enable the engine work at efficient throttle opening interval simultaneously, promote economical.
Step S15: counting whether the ratio of the number N12 of the accelerator opening values in the preset second accelerator opening range to the preset number threshold N0 is larger than a preset second ratio B2, and if so, executing a step S16.
Step S16: and increasing the gear upshift vehicle speed, wherein the maximum value of the second accelerator opening range is smaller than the minimum value of the first accelerator opening range.
due to the reasons of light load, low running speed, no need of rapid acceleration, no overtaking, low road gradient and the like, when the vehicle runs at low load frequently, the small accelerator opening ratio is higher, and the vehicle is represented as power excess. The vehicle can work at higher gears more by increasing the gear-up speed of each gear, so that the engine works in an efficient accelerator opening range, the higher the gear of the gearbox, the better the economical efficiency, and the economical efficiency of driving is improved.
Specifically, the preset number threshold N0 may be 130000 times, and if the accelerator opening is read once per second, it may be further determined whether the number N1 of the stored accelerator opening values is equal to the preset number threshold N0 by determining whether the time for storing the accelerator opening values reaches 130000 seconds, so as to avoid the need of counting data recorded each time.
Specifically, the first accelerator opening range may be 80% to 100%, and the second accelerator opening range may be 0% to 40%. The minimum value and the maximum value of the first accelerator opening range respectively refer to 80% and 100%; the minimum value and the maximum value of the second accelerator opening range mean 0% and 40%, respectively. The maximum value of the second accelerator opening range is smaller than the minimum value of the first accelerator opening range, namely that 40% of the maximum value of the second accelerator opening range is smaller than 80% of the minimum value of the first accelerator opening range.
the embodiment provides a control method of a gear shifting strategy of an AMT, which stores accelerator opening data, analyzes a vehicle running state through an accelerator opening ratio, and updates the existing gear shifting strategy according to the actual vehicle use condition, so that an engine works in a reasonable interval, and the actual driving condition of the vehicle and the power demand of a driver are fully met.
example two
the present embodiment provides another method for controlling a gear shifting strategy of an AMT, referring to fig. 2, the method may include:
Step S21: when the engine is in an opening state and the accelerator opening is larger than zero, the accelerator opening value is read and stored every preset time.
Specifically, when the engine is in an open state and the throttle opening is greater than zero, the throttle opening value is read once every second, counting is carried out, and the read throttle opening value is stored in a memory of the controller.
Step S22: and judging whether the number N1 of the stored throttle opening values is equal to a preset number threshold value N0, if so, executing a step S23.
when the number N1 of the stored throttle opening values is too small, there is no guiding meaning for updating the gear shifting strategy, so that the subsequent steps are only performed if the number N1 of the stored throttle opening values exceeds the preset number threshold N0.
Step S23: counting whether the ratio of the number N13 of the throttle opening values in the preset third opening range to the number threshold N0 is larger than a preset third ratio B3, and if so, executing a step S24.
the maximum value of the third opening range is smaller than the minimum value of the first accelerator opening range, and the minimum value of the third opening range is larger than the maximum value of the second accelerator opening range. Specifically, the first accelerator opening range may be 80% to 100%, the second accelerator opening range may be 0% to 40%, and the third accelerator opening range may be 40% to 80%. The third accelerator opening range is a common accelerator opening range, and if the statistical result is that the accelerator opening value is mainly in the common accelerator opening range, namely not in the large accelerator opening range and not in the small accelerator opening range, no strategy change is needed.
Step S24: counting whether the ratio of the number N11 of the accelerator opening values in the preset first accelerator opening range to the number threshold N0 is larger than a preset first ratio B1, if so, executing a step S25, and if not, executing the step S26.
Step S25: and reducing the downshift vehicle speed of the gear.
The intention and the demand of the driver are judged according to the accelerator opening ratio. When the driver often needs strong power and the vehicle is lack of power, the large throttle opening ratio is high. A first throttle opening range, namely a large throttle opening range, is preset. The lower the gearbox gear, the stronger the power. Through reducing the downshift speed of a motor vehicle of each gear, can realize that the vehicle works more at lower gear, promote dynamic property, satisfy driver's stronger power demand, also enable the engine work at efficient throttle opening interval simultaneously, promote economical.
step S26: counting whether the ratio of the number N12 of the accelerator opening values in the preset second accelerator opening range to the preset number threshold N0 is larger than a preset second ratio B2, and if so, executing a step S27.
Step S27: and increasing the gear upshift vehicle speed, wherein the maximum value of the second accelerator opening range is smaller than the minimum value of the first accelerator opening range.
Due to the reasons of light load, low running speed, no need of rapid acceleration, no overtaking, low road gradient and the like, when the vehicle runs at low load frequently, the small accelerator opening ratio is higher, and the vehicle is represented as power excess. The vehicle can work at higher gears more by increasing the gear-up speed of each gear, so that the engine works in an efficient accelerator opening range, the higher the gear of the gearbox, the better the economical efficiency, and the economical efficiency of driving is improved.
Referring to fig. 3, an upshift schedule among the shift control schedules for the AMT is illustrated. The vehicle controller determines whether to shift according to the number of vehicles and the opening degree of an accelerator, and different gear shifting curves exist at different gears. The vehicle controller collects information of vehicle speed (abscissa) and accelerator opening degree (ordinate), and if the coordinate point is on the right side of the current gear shift line, the gear is shifted to be changed into a higher gear. In delivering the vehicle to the customer, the vehicle controller has stored the shift control rules as shown in fig. 3, which were obtained by the vehicle manufacturer through computational analysis and induction. The invention modifies the gear upshift speed, namely, the gear shifting curve is moved left or right.
The step of increasing the gear upshift vehicle speed specifically comprises:
And calculating a new gear-up strategy and replacing the original gear-up strategy by a second formula, wherein the second formula is as follows:
And V4 is a new upshift speed, V3 is an original upshift speed, V0 is a lowest shift speed, B3 is the third ratio, and P2 is the ratio of the number of throttle opening values in the third opening degree range to the number threshold.
the shift curve corresponding to each gear comprises a minimum shift vehicle speed V0. When the V0 is low, the vehicle needs to be shifted to a higher gear just after starting, so that the engine speed is lower than the lowest running speed (idling speed), and flameout is caused; the higher the gear is, the worse the power is, if the lowest shift speed V0 is small, the whole vehicle can run at a high gear for most of time, and the power performance of the whole vehicle can not meet the requirement of a user; part of vehicle type emission regulations require that the whole vehicle runs for a section of typical working condition, and different gear shifting rules can cause the engine to run at different rotating speeds and torques, thereby influencing the emission test result. The requirements on emission, stability and minimum dynamic performance are all minimum target values during vehicle design, and the minimum gear shifting vehicle speed V0 reaching the minimum target values can be found out through vehicle simulation and test verification.
The downshift strategy and the upshift strategy in the gear shift control strategy of the AMT are similar to each other and are the prior art, and are not described in detail in this embodiment.
The step of reducing the gear downshift vehicle speed specifically includes:
calculating a new downshift strategy through a first formula and replacing the original downshift strategy, wherein the first formula is as follows:
Wherein V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, and P2 is the ratio of the number of accelerator opening values in the third opening range to the number threshold.
the shift curve for each gear comprises a highest gear shift vehicle V9. When the V9 is high, the engine is switched to a higher gear only when the engine is rotated at a high speed, and the vehicle is greatly frustrated due to the fact that the engine is rotated at a high speed; the lower the gear is, the worse the economy is, if the highest gear shifting vehicle V9 is very high, the whole vehicle can run at a low gear for most of time, and the economy of the whole vehicle can not meet the requirement of the whole vehicle; part of vehicle type emission regulations require that the whole vehicle runs for a section of typical working condition, and different gear shifting rules can cause the engine to run at different rotating speeds and torques, thereby influencing the emission test result. The above requirements for emission, stability and minimum economy all have minimum target values during the design of the whole vehicle, and the highest gear shifting vehicle V9 reaching the minimum target values can be found out through the simulation and test verification of the whole vehicle.
It should be noted that the number N1 of the accelerator opening values counted and stored each time is equal to the preset number threshold N0, and after subsequent determination, the stored accelerator opening value data need to be cleared, and storage and counting are restarted. For example, counting that the ratio of the number N13 of the throttle opening values in the third opening range to the number threshold N0 is not greater than a preset third ratio B3, emptying the stored throttle opening value data, and starting to store and count again; or counting the ratio of the number N11 of the throttle opening values in the preset first throttle opening range to the number threshold N0 is not more than a preset first ratio B1, counting the ratio of the number N12 of the throttle opening values in the preset second throttle opening range to the preset number threshold N0 is not more than a preset second ratio B2, emptying the stored throttle opening value data, and starting to store and count again.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention.
The following are embodiments of the apparatus of the present invention that may be used to perform embodiments of the method of the present invention. For details which are not disclosed in the embodiments of the apparatus of the present invention, reference is made to the embodiments of the method of the present invention.
EXAMPLE III
The present embodiment provides a control device of a gear shift strategy of an AMT, referring to fig. 4, the device includes: the gear shifting control system comprises a data acquisition and storage unit 11, a first judgment unit 12, a second judgment unit 13, a first gear shifting strategy updating unit 14, a third judgment unit 15 and a second gear shifting strategy updating unit 16.
The data acquisition and storage unit 11 is used for starting to read and store the opening degree value of the accelerator at preset time intervals when the engine is in an opening state and the opening degree of the accelerator is greater than zero;
The first judging unit 12 is configured to judge whether the number of the stored accelerator opening values is equal to a preset number threshold, and if yes, execute the second judging unit 13;
The second judging unit 13 is configured to count whether a ratio of the number of the accelerator opening values within a preset first accelerator opening range to the number threshold is greater than a preset first ratio, if so, execute the first gear shift strategy updating unit 14, and if not, execute the third judging unit 15;
The first gear shifting strategy updating unit 14 is used for reducing the gear downshift vehicle speed;
The third judging unit 15 is configured to count whether a ratio of the number of the accelerator opening values within a preset second accelerator opening range to the number threshold is greater than a preset second ratio, and if so, execute the second gear shift strategy updating unit 16;
and the second gear-shifting strategy updating unit 16 is configured to increase a gear upshift vehicle speed, and a maximum value of the second accelerator opening range is smaller than a minimum value of the first accelerator opening range.
the control device of the gear shifting strategy of the AMT stores accelerator opening data, analyzes the running state of a vehicle through the accelerator opening ratio, updates the existing gear shifting strategy according to the actual use condition of the vehicle, enables an engine to work in a reasonable interval, and fully meets the actual running condition of the vehicle and the power demand of a driver.
example four
The present embodiment provides another control device for a gear shifting strategy of an AMT, referring to fig. 5, the device includes: the system comprises a data acquisition and storage unit 11, a first judgment unit 12, a second judgment unit 13, an execution first gear shifting strategy updating unit 14, a third judgment unit 15, a second gear shifting strategy updating unit 16 and a fourth judgment unit 17.
A fourth determining unit 17, configured to count whether a ratio of the number of the accelerator opening values within a preset third opening range to the number threshold is greater than a preset third ratio before executing the second determining unit 13, if so, execute the second determining unit 13, where a maximum value of the third opening range is smaller than a minimum value of the first accelerator opening range, and a minimum value of the third opening range is greater than a maximum value of the second accelerator opening range.
specifically, the first accelerator opening range may be 80% to 100%, the second accelerator opening range may be 0% to 40%, and the third accelerator opening range may be 40% to 80%. The third accelerator opening range is a common accelerator opening range, and if the statistical result is that the accelerator opening value is mainly in the common accelerator opening range, namely not in the large accelerator opening range and not in the small accelerator opening range, no strategy change is needed.
preferably, the first shift strategy updating unit 14 is specifically configured to:
calculating a new downshift strategy through a first formula and replacing the original downshift strategy, wherein the first formula is as follows:
Wherein V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, and P2 is the ratio of the number of accelerator opening values in the third opening range to the number threshold.
preferably, the second shift strategy updating unit 16 is specifically configured to:
and calculating a new gear-up strategy and replacing the original gear-up strategy by a second formula, wherein the second formula is as follows:
And V4 is a new upshift speed, V3 is an original upshift speed, V0 is a lowest shift speed, B3 is the third ratio, and P2 is the ratio of the number of throttle opening values in the third opening degree range to the number threshold.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A control method of a gear shifting strategy of an AMT comprises the steps that when an engine is in an opening state and the throttle opening degree is larger than zero, the throttle opening degree value is read and stored every preset time; it is characterized by also comprising:
Judging whether the number of the stored throttle opening values is equal to a preset number threshold value or not;
if the stored number of the accelerator opening values is equal to a preset number threshold value, counting whether the ratio of the number of the accelerator opening values in a preset first accelerator opening range to the number threshold value is larger than a preset first ratio or not, if so, reducing the speed of the gear downshift, and if not, counting whether the ratio of the number of the accelerator opening values in a preset second accelerator opening range to the number threshold value is larger than a preset second ratio or not;
and if the ratio of the number of the accelerator opening values in the preset second accelerator opening range to the number threshold value is larger than a preset second ratio, the gear upshift speed is increased, and the maximum value of the second accelerator opening range is smaller than the minimum value of the first accelerator opening range.
2. the method according to claim 1, wherein before the step of counting whether the ratio of the number of throttle opening values within the preset first throttle opening range to the number threshold is greater than a preset first ratio, the method further comprises:
counting whether the ratio of the number of the accelerator opening values in the preset third opening range to the number threshold is larger than a preset third ratio, if so, executing the step of counting whether the ratio of the number of the accelerator opening values in the preset first accelerator opening range to the number threshold is larger than the preset first ratio, wherein the maximum value of the third opening range is smaller than the minimum value of the first accelerator opening range, and the minimum value of the third opening range is larger than the maximum value of the second accelerator opening range.
3. the method of claim 2, wherein reducing the gear downshift vehicle speed specifically comprises:
calculating a new downshift strategy through a first formula and replacing the original downshift strategy, wherein the first formula is as follows:
wherein V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, and P2 is the ratio of the number of accelerator opening values in the third opening range to the number threshold.
4. the method of claim 2, wherein increasing the gear upshift vehicle speed specifically comprises:
And calculating a new gear-up strategy and replacing the original gear-up strategy by a second formula, wherein the second formula is as follows:
And V4 is a new upshift speed, V3 is an original upshift speed, V0 is a lowest shift speed, B3 is the third ratio, and P2 is the ratio of the number of throttle opening values in the third opening degree range to the number threshold.
5. A control device of a gear shifting strategy of an AMT comprises a data acquisition and storage unit, a data acquisition and storage unit and a data processing unit, wherein the data acquisition and storage unit is used for starting to read and store an accelerator opening value every preset time when an engine is in an opening state and the accelerator opening is larger than zero; it is characterized by also comprising:
The first judging unit is used for judging whether the number of the stored throttle opening values is equal to a preset number threshold value or not, and if so, the second judging unit is executed;
The second judging unit is used for counting whether the ratio of the number of the accelerator opening values in the preset first accelerator opening range to the number threshold is larger than a preset first ratio or not, if so, executing the first gear shifting strategy updating unit, and if not, executing the third judging unit;
The first gear shifting strategy updating unit is used for reducing the gear downshift vehicle speed;
the third judging unit is used for counting whether the ratio of the number of the accelerator opening values within a preset second accelerator opening range to the number threshold is larger than a preset second ratio or not, and if so, executing a second gear shifting strategy updating unit;
and the second gear shifting strategy updating unit is used for increasing the gear upshift vehicle speed, and the maximum value of the second accelerator opening range is smaller than the minimum value of the first accelerator opening range.
6. The apparatus of claim 5, further comprising:
A fourth judging unit, configured to count whether a ratio of the number of the accelerator opening values within a preset third opening range to the number threshold is greater than a preset third ratio before executing the second judging unit, if so, executing the second judging unit, where a maximum value of the third opening range is smaller than a minimum value of the first accelerator opening range, and a minimum value of the third opening range is greater than a maximum value of the second accelerator opening range.
7. the arrangement according to claim 6, characterized in that the first shift strategy updating unit is specifically configured to:
Calculating a new downshift strategy through a first formula and replacing the original downshift strategy, wherein the first formula is as follows:
Wherein V2 is the new downshift vehicle speed, V1 is the original downshift vehicle speed, V9 is the highest shift vehicle speed, B3 is the third ratio, and P2 is the ratio of the number of accelerator opening values in the third opening range to the number threshold.
8. the arrangement according to claim 6, characterized in that the second shift strategy updating unit is specifically configured to:
And calculating a new gear-up strategy and replacing the original gear-up strategy by a second formula, wherein the second formula is as follows:
And V4 is a new upshift speed, V3 is an original upshift speed, V0 is a lowest shift speed, B3 is the third ratio, and P2 is the ratio of the number of throttle opening values in the third opening degree range to the number threshold.
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| CN109177977B (en) * | 2018-11-02 | 2021-04-30 | 盛瑞传动股份有限公司 | Gear shifting strategy correction method and system based on driving intention |
| CN111746536B (en) * | 2019-03-27 | 2021-05-11 | 广州汽车集团股份有限公司 | Control method and device in self-adaptive cruise acceleration process and computer equipment |
| CN111365451A (en) * | 2020-04-10 | 2020-07-03 | 中国北方车辆研究所 | Gear shifting strategy correction method for automatic transmission |
| CN113511207A (en) * | 2021-05-27 | 2021-10-19 | 潍柴动力股份有限公司 | Whole vehicle engine transient control method and vehicle |
| CN114491412B (en) * | 2022-01-24 | 2024-05-24 | 一汽解放汽车有限公司 | Gear shifting data statistics method |
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