CN114542699B - Automatic transmission ramp lifting gear optimization method, controller and motor vehicle - Google Patents
Automatic transmission ramp lifting gear optimization method, controller and motor vehicle Download PDFInfo
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- CN114542699B CN114542699B CN202210270723.8A CN202210270723A CN114542699B CN 114542699 B CN114542699 B CN 114542699B CN 202210270723 A CN202210270723 A CN 202210270723A CN 114542699 B CN114542699 B CN 114542699B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005457 optimization Methods 0.000 title claims description 10
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/60—Inputs being a function of ambient conditions
- F16H59/66—Road conditions, e.g. slope, slippery
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/24—Inputs being a function of torque or torque demand dependent on the throttle opening
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H2059/142—Inputs being a function of torque or torque demand of driving resistance calculated from weight, slope, or the like
-
- 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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/60—Inputs being a function of ambient conditions
- F16H59/66—Road conditions, e.g. slope, slippery
- F16H2059/663—Road slope
Abstract
The invention relates to an automatic transmission ramp up-down gear optimizing method, a controller and a motor vehicle, which comprise the following steps: acquiring the duration time T1 of the vehicle running on a road section with the gradient larger than zero and the duration time T2 of the accelerator opening lower than the accelerator opening of a gear shift line when the vehicle runs on the road section; if T1> calibration value a and T2> calibration value b, downshifting; if T1> the calibrated value a and T2 is less than or equal to the calibrated value b, the current gear is maintained. The gear selection is carried out by judging the time when the gradient is larger than zero and the duration time when the accelerator opening is smaller than the accelerator opening of the gear shifting line, so that the stability of the gear of the vehicle during the running of the ramp road section is improved, invalid upshift during the running of the whole vehicle is avoided, and the economy and the running comfort of the vehicle are improved.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an automatic transmission ramp up-down gear optimization method, a controller and a motor vehicle.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
When the vehicle with the automatic transmission runs on a slope road section, a driver can unconsciously loose the throttle or decelerate in a long loose way, and the operation way can lead the speed of the vehicle to cross a gear shifting line, so that the automatic transmission frequently executes upshift or downshift, and downshift can occur due to insufficient power after upshift.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides an automatic transmission ramp lifting gear optimizing method, a controller and a motor vehicle, gear selection is performed by judging the time when the gradient is larger than zero and the duration time of the throttle release, and the gear running stability is improved.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a first aspect of the present invention provides a method for optimizing a hill lift of an automatic transmission, comprising the steps of:
acquiring the duration time T1 of the vehicle running on a road section with the gradient larger than zero and the duration time T2 of the accelerator opening lower than the accelerator opening of a gear shift line when the vehicle runs on the road section;
if T1 is less than or equal to the calibration value a, maintaining the current gear;
if T1> calibration value a and T2> calibration value b, downshifting;
if T1> the calibrated value a and T2 is less than or equal to the calibrated value b, the current gear is maintained.
If the accelerator is not released and T1 is less than or equal to the calibration value a and T2 is less than or equal to the calibration value b during running of the vehicle, the vehicle keeps running in the current gear.
The automatic transmission is an AMT transmission.
A second aspect of the present invention provides a controller implementing the above-described upshift optimization method, the controller being configured to:
acquiring the duration time T1 of the vehicle running on a road section with the gradient larger than zero and the duration time T2 of the accelerator opening of the road section being lower than the accelerator opening of a gear shift line;
if T1 is less than or equal to the calibration value a, maintaining the current gear;
if T1> calibration value a and T2> calibration value b, downshifting;
if T1> the calibrated value a and T2 is less than or equal to the calibrated value b, the current gear is maintained.
The controller is further configured to: if the accelerator is not released and T1 is less than or equal to the calibration value a and T2 is less than or equal to the calibration value b during running of the vehicle, the vehicle keeps running in the current gear.
A third aspect of the invention provides a motor vehicle comprising an on-board computer configured to:
if T1 is less than or equal to the calibration value a, maintaining the current gear;
if T1> calibration value a and T2> calibration value b, downshifting;
if T1> the calibrated value a and T2 is less than or equal to the calibrated value b, the current gear is maintained.
The vehicle-mounted computer is further configured to: if the accelerator is not released and T1 is less than or equal to the calibration value a and T2 is less than or equal to the calibration value b during running of the vehicle, the vehicle keeps running in the current gear.
Compared with the prior art, the above technical scheme has the following beneficial effects:
the gear selection is carried out by judging the time when the gradient is larger than zero and the duration time when the accelerator opening is smaller than the accelerator opening of the gear shifting line, so that the stability of the gear of the vehicle during the running of the ramp road section is improved, invalid upshift during the running of the whole vehicle is avoided, and the economy and the running comfort of the vehicle are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a flow diagram of a method for optimizing a hill upshift of an automatic transmission according to one or more embodiments of the present invention;
FIG. 2 is a graphical representation of pre-optimization vehicle gear, vehicle speed and altitude provided by one or more embodiments of the present invention;
FIG. 3 is a graphical representation of optimized vehicle gear, speed and altitude provided by one or more embodiments of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As described in the background art, when a vehicle equipped with an automatic transmission runs on a slope road section, a driver may unconsciously loose a throttle short or slow down by a long loose throttle, and this operation manner may cause the vehicle speed to cross a shift line, which results in frequent upshifts or downshifts of the automatic transmission, and downshifts may occur due to insufficient power after upshifts.
The following embodiments provide a method for optimizing a hill lift gear of an automatic transmission, a controller, and a motor vehicle, which improve gear driving stability by determining a time when a gradient is greater than zero and a duration time when an accelerator opening is lower than an accelerator opening of a shift line.
Embodiment one:
as shown in fig. 1, a method for optimizing a hill upshift and downshift of an automatic transmission includes the steps of:
acquiring the duration time T1 of the vehicle running on a road section with the gradient larger than zero and the duration time T2 of the accelerator opening of the road section being lower than the accelerator opening of a gear shift line;
if T1 is less than or equal to the calibration value a, maintaining the current gear;
if T1> calibration value a and T2> calibration value b, downshifting;
if T1> the calibrated value a and T2 is less than or equal to the calibrated value b, the current gear is maintained.
When the vehicle runs on a slope, if the accelerator is loosened, the following strategies are executed:
if the duration time T1 of the vehicle running on the road section with the gradient larger than zero is smaller than or equal to the calibration value a, maintaining the current gear;
if the duration time T1> of the vehicle running on the road section with the gradient larger than zero is equal to a calibration value a, and the throttle opening on the road section is lower than the duration time T2> of the throttle opening of the gear shift line is equal to a calibration value b, the gear is shifted down;
if the duration time T1 of the vehicle running on the road section with the gradient larger than zero is larger than the calibration value a and the duration time T2 of the accelerator opening of the gear shift line on the road section is smaller than or equal to the calibration value b, the current gear is maintained.
If the accelerator is not released and T1 is less than or equal to the calibration value a and T2 is less than or equal to the calibration value b during running of the vehicle, the vehicle keeps running in the current gear.
The automatic transmission involved in the above process is an AMT transmission.
A grade greater than zero refers to a vehicle entering a hill section, which can be achieved by pre-installed sensors (e.g., angle sensors, gyroscopes, etc.) on the vehicle.
The gear selection is carried out by judging the time when the gradient is larger than zero and the duration time when the accelerator opening is smaller than the accelerator opening of the gear shifting line, so that the stability of the gear of the vehicle during the running of the ramp road section is improved, invalid upshift during the running of the whole vehicle is avoided, and the economy and the running comfort of the vehicle are improved.
The vehicle speed change before and after optimization is shown in fig. 2-3 under the same altitude change.
As shown in fig. 2, before optimization, when the vehicle runs on a slope, the operation of a driver causes the accelerator to loosen, so that the accelerator passes through an upshift line, invalid upshift occurs, and the economy and the travelling comfort of the whole vehicle are affected.
As shown in fig. 3, after optimization, when the vehicle enters a slope, the time when the gradient of the whole vehicle is larger than zero after the accelerator is loosened and the duration time when the accelerator opening is lower than the accelerator opening of a gear shifting line are judged to select gears, so that the problems that the accelerator is loosened to cross the gear shifting line and an ineffective upshift occurs are solved, the vehicle can stably drive in the gear, and the economy and the driving comfort of the whole vehicle are greatly improved.
Embodiment two:
the present embodiment provides a controller for implementing the above gear shift optimization method, where the controller is configured to:
acquiring the duration time T1 of the vehicle running on a road section with the gradient larger than zero and the duration time T2 of the accelerator opening of the road section being lower than the accelerator opening of a gear shift line;
if T1 is less than or equal to the calibration value a, maintaining the current gear;
if T1> calibration value a and T2> calibration value b, downshifting;
if T1> the calibrated value a and T2 is less than or equal to the calibrated value b, the current gear is maintained.
The controller selects the gear by judging the time when the gradient is larger than zero and the duration time when the accelerator opening is smaller than the accelerator opening of the gear shifting line, so that the stability of the gear of the vehicle during the running of the ramp road section is improved, invalid upshift during the running of the whole vehicle is avoided, and the economy and the running comfort of the vehicle are improved.
Embodiment III:
the present embodiment provides a motor vehicle having an on-board computer that performs the method of the first embodiment.
The vehicle-mounted computer carries out gear selection by judging the time when the gradient is larger than zero and the duration time when the accelerator opening is lower than the accelerator opening of the gear shifting line, so that the stability of the gear of the vehicle during the running of a ramp section is improved, invalid upshift during the running of the whole vehicle is avoided, and the economy and the running comfort of the vehicle are improved.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. An automatic transmission ramp up-down gear optimization method is characterized by comprising the following steps of: comprising the following steps:
acquiring the duration time T1 of the vehicle running on a road section with the gradient larger than zero and the duration time T2 of the accelerator opening lower than the accelerator opening of a gear shift line when the vehicle runs on the road section;
if T1> calibration value a and T2> calibration value b, downshifting;
if T1> the calibration value a and T2 is less than or equal to the calibration value b, maintaining the current gear; if the throttle is not loosened during running of the vehicle, the duration time T1 of the running of the vehicle on a road section with the gradient larger than zero is smaller than or equal to a calibration value a, and meanwhile, the duration time T2 of the accelerator opening of the gear shifting line is smaller than or equal to a calibration value b, and the vehicle maintains the running of the current gear.
2. A method for optimizing a hill hold of an automatic transmission according to claim 1, wherein: if the duration time T1 of the vehicle running on the road section with the gradient larger than zero is smaller than or equal to the calibration value a, the current gear is maintained.
3. A method for optimizing a hill hold of an automatic transmission according to claim 1, wherein: the automatic transmission is an AMT transmission.
4. An automatic transmission ramp up-down gear optimizing controller is characterized in that: is configured to:
acquiring the duration time T1 of the vehicle running on a road section with the gradient larger than zero and the duration time T2 of the accelerator opening lower than the accelerator opening of a gear shift line when the vehicle runs on the road section;
if T1> calibration value a and T2> calibration value b, downshifting;
if T1> the calibration value a and T2 is less than or equal to the calibration value b, maintaining the current gear; if the throttle is not loosened during running of the vehicle, the duration time T1 of the running of the vehicle on a road section with the gradient larger than zero is smaller than or equal to a calibration value a, and meanwhile, the duration time T2 of the accelerator opening of the gear shifting line is smaller than or equal to a calibration value b, and the vehicle maintains the running of the current gear.
5. An automatic transmission hill hold down optimizing controller as defined in claim 4 wherein: is also configured to: if the duration time T1 of the vehicle running on the road section with the gradient larger than zero is smaller than or equal to the calibration value a, the current gear is maintained.
6. A motor vehicle characterized by: the system comprises a vehicle-mounted computer, wherein the vehicle-mounted computer is configured to:
acquiring the duration time T1 of the vehicle running on a road section with the gradient larger than zero and the duration time T2 of the accelerator opening lower than the accelerator opening of a gear shift line when the vehicle runs on the road section;
if T1> calibration value a and T2> calibration value b, downshifting;
if T1> the calibration value a and T2 is less than or equal to the calibration value b, maintaining the current gear; if the throttle is not loosened during running of the vehicle, the duration time T1 of the running of the vehicle on a road section with the gradient larger than zero is smaller than or equal to a calibration value a, and meanwhile, the duration time T2 of the accelerator opening of the gear shifting line is smaller than or equal to a calibration value b, and the vehicle maintains the running of the current gear.
7. A motor vehicle as claimed in claim 6, wherein: the vehicle-mounted computer is further configured to: if the duration time T1 of the vehicle running on the road section with the gradient larger than zero is smaller than or equal to the calibration value a, the current gear is maintained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210270723.8A CN114542699B (en) | 2022-03-18 | 2022-03-18 | Automatic transmission ramp lifting gear optimization method, controller and motor vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210270723.8A CN114542699B (en) | 2022-03-18 | 2022-03-18 | Automatic transmission ramp lifting gear optimization method, controller and motor vehicle |
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| CN114542699A CN114542699A (en) | 2022-05-27 |
| CN114542699B true CN114542699B (en) | 2024-01-12 |
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