CN115013523A - Control method and system for improving plateau gear shifting torque precision and vehicle - Google Patents
Control method and system for improving plateau gear shifting torque precision and vehicle Download PDFInfo
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- CN115013523A CN115013523A CN202210804903.XA CN202210804903A CN115013523A CN 115013523 A CN115013523 A CN 115013523A CN 202210804903 A CN202210804903 A CN 202210804903A CN 115013523 A CN115013523 A CN 115013523A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012937 correction Methods 0.000 claims abstract description 21
- 238000005086 pumping Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- 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
- 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
- F16H59/16—Dynamometric measurement of torque
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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
-
- 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
- F16H2059/147—Transmission input torque, e.g. measured or estimated engine torque
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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
- F16H2061/0075—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by a particular control method
-
- 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
- F16H2061/0075—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by a particular control method
- F16H2061/0087—Adaptive control, e.g. the control parameters adapted by learning
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
Abstract
The invention provides a control method, a control system and a vehicle for improving plateau gear shifting torque accuracy, wherein the control method for improving the plateau gear shifting torque accuracy comprises the following steps: controlling the rotating speed of a hydraulic torque converter to be 0 under the conditions of different altitudes and different engine rotating speeds, and acquiring the display torque M of the engine under the conditions i And calculating the calculated torque M of the engine under the condition pi (ii) a Comparing the calculated torques M pi And the display torque M i Torque deviation Δ M of i Forming a torque deviation delta M correction table; and correcting the output torque of the vehicle under the conditions of the corresponding altitude and the corresponding engine speed by using the torque deviation Delta M correction table. According to the control method for improving the plateau gear shifting torque accuracy, the plateau gear shifting torque accuracy is improved through the torque deviation delta M i Modified plateau transfusionThe torque output precision can be improved, and the plateau gear shifting quality is improved.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a control method for improving plateau gear shifting torque accuracy.
Background
For a vehicle carrying an automatic transmission, the torque precision of an engine flywheel end has a great influence on the gear shifting quality, and if the difference between the actual output torque of an engine and the display torque sent to a TCU (electronic control unit) by an ECU (engine electronic control unit) is large (more than 7%), the control and calibration strategies of the TCU are influenced, gear shifting frustration is caused, and the drivability of the vehicle is reduced.
The torque accuracy of the flywheel end of the engine depends on calibration, accessory torque and calculation of engine body motion resistance torque, the motion resistance of the engine comprises pumping resistance and frictional resistance, and the frictional resistance and the pumping resistance are usually measured on a stand by using a dynamometer for dragging. When the altitude rises, the atmospheric pressure also decreases, and the decrease of the environmental pressure can affect the pumping resistance of the engine, so that the torque precision of the flywheel end of the engine is affected. At present, most electric control systems of engines do not have a plateau correction function for the pumping resistance of the engines. Only a few electric control systems can consider constant correction based on the altitude, and difference processing is carried out between the two points.
For an engine electric control system with pumping resistance, because cost and test resource problems are difficult to realize dynamometer back-dragging tests at various altitude points, plateau correction is mainly calibrated by experience, and certain difference exists between the plateau correction and actual pumping resistance.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to improve the plateau gear shifting torque precision.
In view of this, the present invention provides a control method for improving the precision of the plateau shifting torque.
The invention also provides a control system for improving the plateau gear shifting torque precision.
The invention also provides a vehicle with the control system for improving the plateau gear shifting torque precision.
In order to solve the technical problems, the invention adopts the following technical scheme:
the control method for improving the accuracy of the plateau shifting torque according to the embodiment of the first aspect of the invention comprises the following steps:
at different altitudes and different engine revolutionsControlling the rotating speed of the hydraulic torque converter to be 0 under the speed condition, and collecting the display torque M of the engine under the condition i And calculating the calculated torque M of the engine under the condition pi ；
Comparing the calculated torques M pi And the display torque M i Torque deviation Δ M of i Forming a torque deviation delta M correction table;
correcting the output torque of the vehicle under the conditions of corresponding altitude and corresponding engine speed by using the torque deviation delta M correction table;
wherein i is a natural number of 1, 2, 3 … n.
The control method for improving the plateau shifting torque accuracy according to the embodiment of the invention can also have the following technical characteristics.
Further, the performance parameter of the hydraulic torque converter is MP 2000.
Further, the calculated torque M pi The calculation formula of (c) is as follows: m pi ＝(Neng/2000) 2 MP2000, wherein Neng is engine speed.
Further, the Δ M i The calculation formula of (a) is as follows: delta M i ＝M pi -M i 。
Further, the display torque M of the engine under the condition is collected i The method comprises the following steps:
braking the vehicle and stepping on an accelerator pedal;
the engine was stabilized at different speeds for 5 seconds.
Further, braking the vehicle includes braking the vehicle in D range via electric braking or a handbrake and a brake pedal.
Further, the torque deviation Δ M correction table is called by an engine electronic control unit software program.
The control system for improving the accuracy of the plateau shift torque according to the embodiment of the second aspect of the present invention includes:
an engine electronic control unit capable of invoking a Δ M correction table to compensate for the calculated output torque.
A vehicle according to an embodiment of a third aspect of the invention includes the control system for improving accuracy of the altitude shift torque described in the above embodiment.
The technical scheme of the invention at least has the following technical effects:
according to the control method for improving the plateau gear shifting torque accuracy, the plateau gear shifting torque accuracy is improved through the torque deviation delta M i The plateau output torque is corrected, the torque output precision can be improved, and the plateau gear shifting quality is improved.
Drawings
FIG. 1 is a flowchart of a control method for improving plateau shift torque accuracy according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a torque deviation calculation process in the control method for improving the accuracy of the plateau shift torque according to the embodiment of the present invention;
fig. 3 is a schematic diagram of a process of output torque correction in the control method for improving the accuracy of the plateau shift torque according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the description of the embodiments of the invention given above, are within the scope of protection of the invention.
The following first describes a control method for improving the accuracy of the plateau shift torque according to an embodiment of the present invention in detail with reference to the accompanying drawings.
As shown in fig. 1, the control method for improving the accuracy of the plateau shift torque according to the embodiment of the present invention includes the following steps:
s1, controlling the rotation speed of the hydraulic torque converter to be 0 under the conditions of different altitudes and different engine rotation speeds, and collecting the display torque M of the engine under the conditions i And calculating the calculated torque M of the engine under the condition pi ；
S2, comparing and calculating the torque M pi And display torque M i Torque deviation Δ M of i Forming a torque deviation delta M correction table;
s3, correcting the output torque of the vehicle under the conditions of corresponding altitude and corresponding engine speed by using a torque deviation delta M correction table;
wherein i is a natural number of 1, 2, 3 … n.
That is, as shown in fig. 2, the torque of the vehicle at different engine speeds is measured at a certain altitude. Controlling the rotating speed of the hydraulic torque converter to be 0, and acquiring the display torque M of the engine i Obtaining a calculated torque M based on the torque converter characteristics pi Displaying the torque M of the collected engine i And calculating the torque M pi Obtaining torque deviation Delta M through comparison i Sequentially measuring and calculating torque deviation delta M under different altitudes and different engine rotating speeds i And a torque deviation Δ M correction table as shown in table 1 below is formed. As shown in FIG. 3, the torque deviation Δ M i The torque compensation is added to the existing torque calculation of the engine as plateau torque compensation, so that the torque of the vehicle during running on plateau can be corrected, and the torque output precision is improved.
TABLE 1 Torque deviation Δ M correction Table
| Altitude m/rpm | 1000 | 1200 | 1400 | 1600 | 1800 | 2000 | 2200 | 2400 | 2600 | 2800 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1000 | ||||||||||
| 1500 | ||||||||||
| 2000 | ||||||||||
| 2500 | ||||||||||
| 3000 | ||||||||||
| 3500 | ||||||||||
| 4000 | ||||||||||
| 4500 |
Therefore, according to the control method for improving the plateau shifting torque accuracy, provided by the embodiment of the invention, through the torque deviation delta M i The plateau output torque is corrected, the torque output precision can be improved, and the plateau gear shifting quality is improved.
Preferably, the performance parameter of the torque converter is MP 2000. Specifically, the performance parameters of torque converters are commonly MP1000 and MP 2000. The MP 2000-based value is a torque value at the output end at a specific transmission ratio when the input rotation speed of the pump impeller of the torque converter is 2000 rpm.
According to one embodiment of the invention, the torque M is calculated pi The calculation formula of (a) is as follows: m pi ＝(Neng/2000) 2 MP2000, wherein Neng is engine speed.
Further, Δ M i The calculation formula of (a) is as follows: delta M i ＝M pi -M i 。
In one embodiment of the invention, the display torque M of the engine under the condition is collected 1 The method comprises the following steps: braking the vehicle and stepping on an accelerator pedal; the engine was stabilized at different speeds for 5 seconds. Acquired display torque M i The data is more accurate.
Optionally, braking the vehicle comprises braking the vehicle in D range by electric braking or by hand brake and brake pedal.
According to one embodiment of the invention, the torque deviation Δ M correction table is called by a vehicle engine electronic control unit software program.
In other words, the method can be realized only by developing related programs for the electronic control unit of the vehicle engine, does not need to increase hardware facilities, and is easy to realize and low in cost.
In summary, according to the control method for improving the plateau shifting torque accuracy of the embodiment of the invention, the plateau shifting torque accuracy is improved through the torque deviation Δ M i The plateau output torque is corrected, the torque output precision can be improved, and the plateau gear shifting quality is improved.
The control system for improving the accuracy of the plateau shift torque according to the embodiment of the second aspect of the invention includes an engine electronic control unit capable of calling a Δ M correction table to compensate for the calculated output torque. The control system for improving the plateau gear shifting torque precision only needs to carry out program development on the existing electronic control unit of the engine, does not need to change hardware accessories, and is easy to implement.
Other structures and operations of the control system for improving accuracy of plateau shift torque according to the embodiment of the present invention will be understood and readily implemented by those skilled in the art, and thus will not be described in detail.
In an embodiment of the third aspect provided by the invention, a vehicle comprising the control system for improving the precision of the plateau shifting torque of the embodiment is further provided, and because the control system for improving the precision of the plateau shifting torque of the embodiment of the invention has the technical effects, the vehicle according to the embodiment of the invention also has the corresponding technical effects, namely the operability of the gear shifting of the transfer case can be ensured to the greatest extent, and unnecessary troubles caused by frequent false alarm faults are avoided.
Other structures and operations of the vehicle according to the embodiment of the present invention will be understood and readily implemented by those skilled in the art, and thus will not be described in detail.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the principles of the invention as set forth in the appended claims.
Claims (9)
1. A control method for improving plateau gear shifting torque accuracy is characterized by comprising the following steps:
controlling the rotating speed of a hydraulic torque converter to be 0 under the conditions of different altitudes and different engine rotating speeds, and acquiring the display torque M of the engine under the conditions i And calculating the calculated torque M of the engine under the condition pi ；
Comparing the calculated torques M pi And the display torque M i Torque deviation Δ M of i Forming a torque deviation delta M correction table;
correcting the output torque of the vehicle under the conditions of corresponding altitude and corresponding engine speed by using the torque deviation delta M correction table;
wherein i is a natural number of 1, 2, 3 … n.
2. The control method for improving plateau shift torque accuracy according to claim 1, wherein the performance parameter of the torque converter is MP 2000.
3. The control method for improving accuracy of plateau shift torque according to claim 1, wherein the calculated torque M is pi The calculation formula of (a) is as follows: m pi ＝(Neng/2000) 2 MP2000, wherein Neng is engine speed.
4. The control method for improving plateau shift torque accuracy of claim 1, wherein said Δ M is i The calculation formula of (c) is as follows: delta M i ＝M pi -M i 。
5. The control method for improving the accuracy of plateau shift torque according to claim 1, wherein the display torque M of the engine under the condition is collected i The method comprises the following steps:
braking the vehicle and stepping on an accelerator pedal;
the engine was stabilized at different speeds for 5 seconds.
6. The control method for improving plateau shift torque accuracy of claim 5, wherein braking the vehicle comprises braking the vehicle in D gear by electric braking or handbrake and brake pedal.
7. The control method for improving plateau shift torque accuracy of claim 1, wherein the torque deviation Δ M correction table is invoked by an engine electronic control unit software program.
8. A control system for improving plateau shift torque accuracy, comprising:
an engine electronic control unit capable of invoking a Δ M correction table to compensate for the calculated output torque.
9. A vehicle characterized by comprising the control system for improving accuracy of plateau shift torque as recited in claim 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210804903.XA CN115013523A (en) | 2022-07-08 | 2022-07-08 | Control method and system for improving plateau gear shifting torque precision and vehicle |
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| CN202210804903.XA CN115013523A (en) | 2022-07-08 | 2022-07-08 | Control method and system for improving plateau gear shifting torque precision and vehicle |
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| CN202210804903.XA Pending CN115013523A (en) | 2022-07-08 | 2022-07-08 | Control method and system for improving plateau gear shifting torque precision and vehicle |
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| CN111721547A (en) * | 2020-06-28 | 2020-09-29 | 安徽江淮汽车集团股份有限公司 | Plateau hill start analysis input data acquisition method, device, equipment and storage medium |
-
2022
- 2022-07-08 CN CN202210804903.XA patent/CN115013523A/en active Pending
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|---|---|---|---|---|
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| JP2006322588A (en) * | 2005-05-20 | 2006-11-30 | Honda Motor Co Ltd | Controller of vehicle |
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| CN111721547A (en) * | 2020-06-28 | 2020-09-29 | 安徽江淮汽车集团股份有限公司 | Plateau hill start analysis input data acquisition method, device, equipment and storage medium |
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