CN112728069B - Method and system for selecting proper starting gear - Google Patents
Method and system for selecting proper starting gear Download PDFInfo
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- CN112728069B CN112728069B CN202011556826.8A CN202011556826A CN112728069B CN 112728069 B CN112728069 B CN 112728069B CN 202011556826 A CN202011556826 A CN 202011556826A CN 112728069 B CN112728069 B CN 112728069B
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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
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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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
- F16H59/36—Inputs being a function of speed
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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
- F16H59/50—Inputs being a function of the status of the machine, e.g. position of doors or safety belts
- F16H59/52—Inputs being a function of the status of the machine, e.g. position of doors or safety belts dependent on the weight of the machine, e.g. change in weight resulting from passengers boarding a bus
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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
- F16H59/36—Inputs being a function of speed
- F16H2059/366—Engine or motor speed
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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
- F16H2059/663—Road slope
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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
- F16H2061/009—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 using formulas or mathematic relations for calculating parameters
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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
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/0223—Generating of new shift maps, i.e. methods for determining shift points for a schedule by taking into account driveline and vehicle conditions
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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
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
- F16H2061/023—Drive-off gear selection, i.e. optimising gear ratio for drive off of a vehicle
Abstract
The invention discloses a method and a system for selecting a proper starting gear, and belongs to the field of application of AMT (automated mechanical transmission) of commercial vehicles. Firstly, the starting resistance M of the whole vehicle is establishedrAnd transmission chain speed ratio IwholeSelecting a corresponding transmission chain speed ratio I from the data table according to the current vehicle starting resistance M' of the whole vehiclewhole_request(ii) a Is calculated on the basis of Iwhole_requestIs required of the current transmissionGB_requestAccording to IGB_requestMatching a speed ratio greater than or equal to I in the speed ratio listGB_requestThe minimum starting gear is selected as the current starting gear. The invention provides a system for selecting a proper starting gear, which comprises a storage module, a selection module, a calculation module and a search module. The invention can automatically select a more proper starting gear for adjusting the transmission chain speed ratio of the whole vehicle aiming at different vehicle types so as to realize better starting performance.
Description
Technical Field
The invention relates to the field of AMT (automated mechanical transmission) application of commercial vehicles, in particular to a method and a system for selecting a proper starting gear.
Background
The application range of the commercial vehicle is extremely wide and complex, the configuration of the commercial vehicle is rich, the rear axle speed ratio of the tractor and the speed ratio of the matched speed changer are different, and the starting comfort of the automatic transmission vehicle can be greatly improved by selecting a proper starting gear.
At present, the application field of the AMT is basically focused on gear selection of a transmission, other factors which can influence the speed ratio of a transmission chain, such as the speed ratio of a rear axle, the radius of tires and the like are not considered, and the starting gear cannot be timely adjusted according to the speed ratio of the transmission chain except a gearbox, the weight of a vehicle, the gradient and the like.
Disclosure of Invention
The invention aims to provide a method and a system for selecting a proper starting gear, which can control a vehicle to start in a proper speed ratio interval according to different working conditions, provide better starting performance, have reasonable design, overcome the defects of the prior art and have good effect.
In order to achieve object 1 of the present invention, a method for selecting a suitable starting gear is proposed, comprising the steps of:
step 1: establishing starting resistance M of whole vehiclerAnd transmission chain speed ratio IwholeCorresponding data table, wherein the value of r is {1,2, …, N }, and different starting resistances M in the data tablerCorresponding to different transmission chain speed ratios Iwhole；
Step (ii) of2: detecting the current starting resistance of the whole vehicle as M', if Mr＜M'＜Mr+1Then according to the data table of step 1, selecting MrA corresponding drive chain speed ratio;
and step 3: to obtain a base based on Iwhole_requestIs required of the current transmissionGB_requestComprises the following steps:
wherein, GaRadHeb is the rolling radius of the tire;
and 4, step 4: i obtained according to step 3GB_requestMatching a speed ratio greater than or equal to I in the speed ratio listGB_requestThe minimum starting gear is selected as the current starting gear.
Preferably, in step 1:
starting resistance M of whole vehicler：
Mr＝M+M*Pin；
Wherein M is the vehicle weight, and Pin is the gradient;
speed ratio I of transmission chain of whole vehiclewhole：
Wherein Es is the engine speed, Rt is the rolling radius of the tire, and Sfa is the wheel speed signal of the ABS.
Preferably, a gradient sensor is arranged for detecting the current finished automobile gradient Pin in real time.
Preferably, in the speed ratio list in step 4, different speed ratios correspond to different starting gears.
In order to realize the aim 2 of the invention, a system for selecting a proper starting gear is provided, which comprises a storage module, a selection module, a calculation module and a search module;
preferably, the storage module stores the starting resistance M of different vehiclesrAnd corresponding transmission chain speed ratio Iwhole(ii) a In the selection module, according to the current vehicle starting resistance M', the corresponding transmission chain speed ratio I is selected in the storage modulewhole_request(ii) a In the calculation module, the calculation is based on Iwhole_requestIs required of the current transmissionGB_request(ii) a In the search module, according to I output by the calculation moduleGB_requestFinding a speed ratio greater than or equal to I in the speed ratio listGB_requestAnd taking the corresponding minimum starting gear as the current starting gear.
The system is preferably fitted in a controller system of a commercial vehicle.
The beneficial and technical effects brought by the invention are as follows:
aiming at different vehicle types, a more proper starting gear can be automatically selected for adjusting the transmission chain speed ratio of the whole vehicle so as to realize better starting performance.
Drawings
FIG. 1 is a schematic flow chart of a method and system for selecting a suitable starting gear according to the present invention;
Detailed Description
To facilitate understanding and practice of the invention by those of ordinary skill in the art, embodiments of the invention are further described below with reference to the accompanying drawings and specific examples:
a method of selecting a suitable starting gear comprising the steps of:
step 1: establishing starting resistance M of whole vehiclerAnd transmission chain speed ratio IwholeA corresponding data table, wherein the value of r is {1,2, …, N }; different starting resistances M in the data sheetrCorresponding to different transmission chain speed ratios Iwhole；
Starting resistance M of whole vehicler：
Mr＝M+M*Pin；
Wherein M is the vehicle weight, and Pin is the gradient;
speed ratio I of transmission chain of whole vehiclewhole：
Wherein Es is the engine speed, Rt is the rolling radius of the tire, and Sfa is the wheel speed signal of the ABS.
According to the calculated starting resistance M of the whole vehiclerAnd transmission chain speed ratio IwholeThe following data table was established:
| Mr | M1 | M2 | M3 | M4 | M5 | M6 | M7 | M8 |
| Iwhole_request | I1 | I2 | I3 | I4 | I5 | I6 | I7 | I8 |
M1-M8, I1-I8, all of which are calibratable.
Step 2: detecting the current starting resistance of the whole vehicle as M', if M1＜M'＜M2Then, according to the data table of step 1, M is selected1A corresponding drive chain speed ratio;
and step 3: to obtain a base based on Iwhole_requestIs required of the current transmissionGB_requestComprises the following steps:
wherein, GaRadHeb is the rolling radius of the tire;
and 4, step 4: according to step 3, obtainedGB_requestMatching a speed ratio greater than or equal to I in the speed ratio listGB_requestThe minimum starting gear is selected as the current starting gear.
For example, a vehicle equipped with a 16-speed transmission, and calculating IGB_requestAnd matching gears with the speed ratio of more than or equal to 8 in the following speed ratio list, obtaining that the gear 3 is the minimum speed ratio gear with the speed ratio of more than 8 through searching and comparing, and selecting the gear 3 as the current starting gear of the vehicle.
The list of speed ratios is as follows:
| gear position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | 11th | 12th | 13th | 14th | 15th | 16th |
| Speed ratio | 13.12 | 11.05 | 9.17 | 7.72 | 6.3 | 5.3 | 4.38 | 3.68 | 3 | 2.52 | 2.1 | 1.76 | 1.44 | 1.21 | 1 | 0.84 |
A system for selecting a proper starting gear is shown in figure 1 and comprises a storage module, a selection module, a calculation module and a searching module;
specifically, the storage module stores the starting resistance M of different vehiclesrAnd corresponding transmission chain speed ratio Iwhole(ii) a In the selection module, according to the current vehicle starting resistance M', the corresponding transmission chain speed ratio I is selected in the storage modulewhole_request(ii) a In the calculation module, the calculation is based on Iwhole_requestIs required of the current transmissionGB_request(ii) a In the search module, according to I output by the calculation moduleGB_requestFinding a speed ratio greater than or equal to I in the speed ratio listGB_requestAnd taking the corresponding minimum starting gear as the current starting gear.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (4)
1. A method of selecting a suitable starting gear comprising the steps of:
step 1: establishing starting resistance M of whole vehiclerAnd transmission chain speed ratio IwholeA corresponding data table, wherein the value of r is {1,2, …, N };
starting resistance M of whole vehiclerComprises the following steps:
Mr＝M+M*Pin；
wherein M is the vehicle weight, and Pin is the gradient;
speed ratio I of transmission chain of whole vehiclewholeComprises the following steps:
wherein Es is the engine speed, Rt is the rolling radius of the tire, and Sfa is the wheel speed signal of an ABS;
and 2, step: detecting the current starting resistance of the whole vehicle as M', and Mr＜M'＜Mr+1Then according to the data table of step 1, selecting MrCorresponding transmission chain speed ratio Iwhole_request；
And step 3: to obtain a base based on Iwhole_requestCurrent speed ratio of the transmissionGB_requestComprises the following steps:
wherein, GaRadHeb is the rolling radius of the tire;
and 4, step 4: i obtained according to step 3GB_requestMatching a speed ratio greater than or equal to I in the speed ratio listGB_requestSelecting the minimum starting gear as the current starting gear;
in the speed ratio list of step 4, different speed ratios correspond to different starting gears.
2. A method of selecting a suitable starting gear according to claim 1, characterised in that a gradient sensor is provided to detect the current vehicle gradient Pin in real time.
3. The system for selecting the appropriate starting gear according to claim 1 or 2, characterized by comprising a storage module, a selection module, a calculation module and a search module;
the storage module stores the starting resistance M of different vehiclesrAnd corresponding transmission chain speed ratio Iwhole(ii) a In the selection moduleAccording to the current vehicle starting resistance M', selecting the corresponding transmission chain speed ratio I in the storage modulewhole_request(ii) a In the calculation module, the calculation is based on Iwhole_requestIs required of the current transmissionGB_request(ii) a In the searching module, according to I output by the computing moduleGB_requestFinding a speed ratio greater than or equal to I in the speed ratio listGB_requestAnd taking the corresponding minimum starting gear as the current starting gear.
4. A system according to claim 3, characterised in that the system is fitted in a controller system of a commercial vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011556826.8A CN112728069B (en) | 2020-12-25 | 2020-12-25 | Method and system for selecting proper starting gear |
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| CN202011556826.8A CN112728069B (en) | 2020-12-25 | 2020-12-25 | Method and system for selecting proper starting gear |
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| CN112728069A CN112728069A (en) | 2021-04-30 |
| CN112728069B true CN112728069B (en) | 2022-07-08 |
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| CN113639035A (en) * | 2021-08-25 | 2021-11-12 | 安徽江淮汽车集团股份有限公司 | AMT gearbox gear control method for commercial vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6394931B1 (en) * | 1999-07-19 | 2002-05-28 | Eaton Corporation | Starting and driveline shock protection control method and system |
| GB0018184D0 (en) * | 2000-07-26 | 2000-09-13 | Eaton Corp | Automatic selection of start gear |
| DE102007031725A1 (en) * | 2007-07-06 | 2009-01-08 | Zf Friedrichshafen Ag | Method for controlling an automated stepped gearbox |
| JP5254366B2 (en) * | 2008-02-28 | 2013-08-07 | ボルボ ラストバグナー アーベー | Method and apparatus for automatic or semi-automatic selection of a good starting gear of a vehicle |
| DE102010028282A1 (en) * | 2010-04-28 | 2011-12-01 | Zf Friedrichshafen Ag | Method for determining a starting gear in a motor vehicle |
| DE102016215170A1 (en) * | 2016-08-15 | 2018-02-15 | Zf Friedrichshafen Ag | Method for starting a motor vehicle with a hybrid drive |
| CN109357003A (en) * | 2018-08-29 | 2019-02-19 | 汽解放汽车有限公司 | A kind of commercial vehicle automatic mechanical transmission starting gear output control method |
| CN110195780B (en) * | 2019-04-29 | 2020-11-13 | 东风商用车有限公司 | Ramp gear-shifting control method for automatic gearbox of heavy-duty vehicle |
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Address after: 266510 No. 917, Weihe Road, Huangdao District, Shandong, Qingdao Applicant after: ZF commercial vehicle systems (Qingdao) Co.,Ltd. Address before: 266510 No. 917, Weihe Road, Huangdao District, Shandong, Qingdao Applicant before: Wabco (China) Co.,Ltd. |
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