CN109357003A - A kind of commercial vehicle automatic mechanical transmission starting gear output control method - Google Patents
A kind of commercial vehicle automatic mechanical transmission starting gear output control method Download PDFInfo
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- CN109357003A CN109357003A CN201810991316.XA CN201810991316A CN109357003A CN 109357003 A CN109357003 A CN 109357003A CN 201810991316 A CN201810991316 A CN 201810991316A CN 109357003 A CN109357003 A CN 109357003A
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- vehicle
- gear
- speed
- starting gear
- walk
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Classifications
-
- 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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H2306/00—Shifting
- F16H2306/40—Shifting activities
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The present invention relates to a kind of commercial vehicle automatic mechanical transmission starting gear output control methods, comprising the following steps: the fully loaded starting gear of system electrification default；Current hill grade value is calculated according to ramp sensor；The load of vehicle is calculated by one or more periods of shifting gears；According to ramp, load establishes starting gear MAP；Calculate maximum starting gear；The present invention is filtered by calculating acceleration after shift, and to acceleration, by the comparison of target gear and maximum starting gear, so as to which accurately starting gear progress is reasonably selected and exported in real time.The present invention is avoided heavy duty and is started to walk using high tap position according to current ramp, load comprehensive selection one reasonable starting gear, reduce the abrasion of clutch, it avoids starting to walk using low-grade location at light load simultaneously, enhances the comfort level of vehicle start, also reduce oil consumption to a certain extent.
Description
Technical field
The invention belongs to commercial vehicle automatic mechanical type automatic transmission technical fields, and in particular to a kind of starting gear output
Control method, in particular to a kind of commercial vehicle automatic mechanical transmission starting gear output control method.
Background technique
In automatic commercial-vehicle gearbox field, especially in heavy truck automatic transmission field, commercial vehicle is mechanically automatic
Speed changer (AMT speed changer) is increasingly becoming the principal mode of automatic commercial-vehicle gearbox.At abroad, commercial machine AMT speed-changer skill
Art is mature, and major automobile vendor is successively proposed the AMT production transmissions of oneself.At home, each automobile vendor is also numerous and confused
Accelerate AMT production transmissions and research and develop paces, strives breaking through commercial vehicle AMT research and development of products key technology.AMT speed changer has tradition
The transmission efficiency of manual transmission is high, manufacturing cost is low, is easy the characteristics of repairing.Since AMT speed changer is in shift process
The advantages that being automatically performed, shift shock can be reduced, shifting comfort is improved, further decrease driver's labor intensity, AMT speed change
Device has preferable development prospect in automatic commercial-vehicle gearbox field.
As AMT technology develops rapidly, driver focuses more on comfort level and oil consumption etc., for different loads and
The suitable starting gear of gradient selection is particularly important.Such as under complete vehicle curb condition, high-grade starting is selected, can be greatly improved easypro
Appropriateness, heavy-duty vehicle do not select deep low gear to start to walk, i.e. raising comfort level, and save oil consumption.Meanwhile according to the gradient, load etc.
The most reasonable starting gear of factor selection, and export, also there is very important meaning for the control of starting, shift and engine
Justice.
Summary of the invention
The object of the invention is that in view of the above shortcomings of the prior art, providing a kind of commercial vehicle mechanical automatic speed changing
Device starting gear output control method, commercial vehicle automatic mechanical transmission starting gear is carried out based on existing information of vehicles
Position output control.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of commercial vehicle automatic mechanical transmission starting gear output control method, comprising the following steps:
A, after vehicle first powers on, default vehicle be it is fully loaded, in the driving process of vehicle, the time based on setting
The revolving speed of interval acquiring clutch position, engine output shaft and transmission input shaft, and judge to become based on the result of acquisition
Whether fast device is in gearshift condition, when being determined as in gearshift condition, enters step B；
B, after shift, vehicle acceleration is determined using the speed after the speed and shift before shift, and determine current
Driving force F on wheelt, the air drag F that is subject to of vehiclewWith value of slope α locating for vehicle；
C, complete vehicle quality m is calculated based on determining acceleration, driving force, air drag and value of slope；
D, it establishes according to the target gear MAP of the signals such as complete vehicle quality, the gradient, obtains target gear, wherein coordinate system
Horizontal axis is complete vehicle quality, and the longitudinal axis of coordinate system is the current gradient；
E, according to vehicle parameter, the corresponding speed ratio i1 of highest starting gear is calculated, and according to actual vehicle speed ratio to deserved
To highest starting gear；
If F, target gear is less than highest starting gear, target gear is stored, otherwise stores highest starting gear；
G, judge that vehicle is under static or starting state according to speed, output starting gear.
Further, step B, the acceleration a are determined by following formula (1):
Wherein, VBefFor the speed before shift, VAftFor the speed after shift, t is shift time, unit s.
Further, step B, the driving force FtIt is determined based on following formula (2):
Wherein, TtqFor engine torque, iAFor power train transmission ratio, η is power train gross efficiency, and r is tire radius.
Further, step B, the driving force FwIt is determined based on following formula (3):
Wherein, CDFor coefficient of air resistance, A is the front face area of vehicle, and ρ is atmospheric density, and V is the current driving of vehicle
Speed.
Further, step C, the complete vehicle quality are determined based on following formula (4):
Wherein, m is complete vehicle quality, FtFor the driving force on wheel, FwFor the air drag that wheel is subject to, α is value of slope, λ
For rotatory inertia coefficient, fRFor coefficient of rolling resistance, a is acceleration.
Further, step E, the highest starting gear ratios i1It is determined based on following formula (5):
Wherein, WDFor work of slipping, r is Rolling radius of driving wheel, and G is automobile gross mass, and sin θ is gradient sine value, and f is
Coefficient of rolling resistance, McFor clutch input torque, η is power train gross efficiency, i0For driver speed ratio, n is the torsion of engine maximum
Square point revolving speed.
Compared with prior art, the invention has the benefit that
(1), the present invention judges that speed changer is using clutch position and engine output shaft and transmission input shaft revolving speed
No to be in gearshift condition, when being determined as gearshift condition, the speed that shift front and back is accurately obtained by gearbox control system is used for
Acceleration, and be filtered, avoid influence of the acceleration calculation inaccuracy to calculated result；
(2) the target gear MAP according to signals such as complete vehicle quality, the gradients is established, target gear is obtained；
(3) according to vehicle parameter, calculate highest and start to walk gear ratios, and according to actual vehicle speed ratio it is corresponding obtain it is most raised
Walk gear.
Detailed description of the invention
Fig. 1 is commercial vehicle automatic mechanical transmission of the present invention starting gear output control method flow chart；
Fig. 2 is the force analysis figure of vehicle of the invention on ramp.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
Commercial vehicle automatic mechanical transmission load identification of the invention calculates the shift control by placement in the car
Device is calculated, which can be used the control chip with stronger operational capability, such as auspicious Sa M12386, the shift
Controller carries out data interaction by CAN communication with control unit of engine, ABS control unit.It is deposited in advance in gearshift controller
Whole-car parameters relevant to vehicle are contained, the power train transmission ratio i including vehicleA, tire radius r, power train gross efficiency η are empty
Vapour lock force coefficient CD, atmospheric density ρ, front face area A, coefficient of rolling resistance fR, rotatory inertia coefficient lambda etc..The gearshift controller period
Property obtain clutch position information, such as with 10ms be control the period come periodically acquire engine input shaft rotary speed information, become
Fast case input shaft rotating speed information and shift front and back vehicle speed information etc., and according to the clutch position information of acquisition, engine is defeated
Enter axis rotary speed information, transmission input shaft rotary speed information judges whether speed changer is in gearshift condition, be determined as gearshift condition
Afterwards, it executes complete vehicle quality to calculate, target gear MAP is then obtained according to quality, the gradient, specific calculating process is as shown in Figure 1.
The gear output control method as shown in Figure 1, a kind of commercial vehicle automatic mechanical transmission is started to walk, including following step
It is rapid:
A, judge gearshift condition；
B, acceleration, driving force, air drag and value of slope after shift are determined；
C, complete vehicle quality is calculated；
D, the target gear MAP according to signals such as complete vehicle quality, the gradients is established, target gear is obtained；
E: according to vehicle parameter, calculating highest and start to walk gear ratios, and according to actual vehicle speed ratio it is corresponding obtain it is most raised
Walk gear；
If F, target gear is less than highest starting gear, target gear is stored, otherwise stores highest starting gear；
G, judge that vehicle is under static or starting state, output starting gear.
Specifically, above steps specifically:
A, judge gearshift condition:
In the driving process of vehicle, time interval of the gearshift controller based on setting, such as 10ms obtain clutch position
It sets, the revolving speed of engine output shaft and transmission input shaft, and judge whether speed changer is in shift based on the result of acquisition
State enters step S200, when being judged to being not at gearshift condition, then continues to acquire when being determined as in gearshift condition
Data are judged.
B, acceleration, driving force, air drag and value of slope after shift are determined:
Specifically, after shift, gearshift controller determines that vehicle adds using the speed after the speed and shift before shift
Speed is determined as the driving force F on front vehicle wheelt, the air drag F that is subject to of vehiclewWith value of slope α locating for vehicle.
Wherein, the acceleration a can be determined by following formula (1):
Wherein, VBefFor the speed before shift, the speed at that moment when specially shift starts, VAft is after shifting gears
Speed, the speed at that moment when speed is stablized after specially shifting gears, t is shift time, unit s, shift time t
The shift time of the accumulation stored in gear shift transmission, i.e., from start to shift to speed stablizes experienced after shift when
Between.
The driving force FtIt can be determined based on following formula (2):
Wherein, TtqFor the current engine torque that gearshift controller is obtained from control unit of engine, iAFor power train biography
Dynamic ratio, η is power train gross efficiency, and r is tire radius.
The driving force FwIt can be determined based on following formula (3):
Wherein, CDFor coefficient of air resistance, A is the front face area of vehicle, and ρ is atmospheric density, and V is gearshift controller acquisition
Current Vehicle Speed, in an application of the invention, for shift after speed.
C, complete vehicle quality is calculated:
Complete vehicle quality is calculated based on acceleration, driving force, air drag and the value of slope that step S200 is determined.
As shown in Fig. 2, complete vehicle quality can be determined based on following formula (4):
Wherein, m is complete vehicle quality, FtFor the driving force on wheel, FwFor the air drag that wheel is subject to, α is to be passed by the gradient
The vehicle current hill grade value that sensor obtains, λ are rotatory inertia coefficient, fRFor coefficient of rolling resistance, a is acceleration, to avoid counting
Result inaccuracy is calculated, in calculating process, acceleration is filtered, such as is filtered using Kalman filtering function
Processing.
D, the target gear MAP according to signals such as complete vehicle quality, the gradients is established, target gear is obtained:
Specifically, establish using horizontal axis as complete vehicle quality, the longitudinal axis be current hill grade value MAP chart, final output target gear.
Wherein the maximum value of complete vehicle quality is fully loaded quality, and minimum value is empty mass, and value of slope threshold limit value is Slope Transducer institute
It is capable of measuring the maximum value reached, value of slope minimum limit value is capable of measuring the minimum value reached by Slope Transducer.Therefore, when knowing
When the complete vehicle quality of vehicle, grade information, target gear can be determined by looking into MAP table method.
E: according to vehicle parameter, calculating highest and start to walk gear ratios, and according to actual vehicle speed ratio it is corresponding obtain it is most raised
Walk gear:
It brings vehicle parameter into corresponding formula, highest starting gear ratios can be obtained, compare the speed ratio of actual vehicle,
It can be obtained by highest starting gear.The highest starting gear ratios i1It is determined based on following formula (5):
Wherein, WDFor work of slipping, r is Rolling radius of driving wheel, and G is automobile gross mass, and sin θ is gradient sine value, and f is
Coefficient of rolling resistance, McFor clutch input torque, η is power train gross efficiency, i0For driver speed ratio, n is the torsion of engine maximum
Square point revolving speed.
If F, target gear is less than highest starting gear, target gear is stored, otherwise stores highest starting gear:
The gear if highest that target gear is less than starts to walk, illustrates that the target gear inquired by MAP table is reasonable, and carry out
Storage illustrates that the target gear inquired by MAP table is unreasonable, is given up if target gear is higher than highest starting gear
It abandons, only stores highest starting gear.
G, judge that vehicle is under static or starting state, output starting gear:
When vehicle is in static or starting state, stored starting gear can be carried out normally outputing, and supply
System call and other control modules use.
To sum up, the present invention is filtered by calculating acceleration after shift, and to acceleration, and utilizes slope
The value of slope that road sensor obtains calculates gradient resistance, to ensure that the accuracy that complete vehicle quality calculates, according to vehicle matter
The target gear MAP of the signals such as amount, the gradient, obtains target gear, is started to walk the contrast judgement of gear by target gear and highest,
So as to accurately export starting gear.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (6)
- The gear output control method 1. a kind of commercial vehicle automatic mechanical transmission is started to walk, which comprises the following steps:A, after vehicle first powers on, default vehicle be it is fully loaded, in the driving process of vehicle, the time interval based on setting The revolving speed of clutch position, engine output shaft and transmission input shaft is obtained, and speed changer is judged based on the result of acquisition Whether it is in gearshift condition, when being determined as in gearshift condition, enters step B；B, after shift, vehicle acceleration is determined using the speed after the speed and shift before shift, and front vehicle wheel is worked as in determination On driving force Ft, the air drag F that is subject to of vehiclewWith value of slope α locating for vehicle；C, complete vehicle quality m is calculated based on determining acceleration, driving force, air drag and value of slope；D, the target gear MAP according to signals such as complete vehicle quality, the gradients is established, obtains target gear, wherein the horizontal axis of coordinate system For complete vehicle quality, the longitudinal axis of coordinate system is the current gradient；E, according to vehicle parameter, the corresponding speed ratio i of highest starting gear is calculated1, and highest is obtained according to actual vehicle speed ratio correspondence Starting gear；If F, target gear is less than highest starting gear, target gear is stored, otherwise stores highest starting gear；G, judge that vehicle is under static or starting state according to speed, output starting gear.
- The gear output control method 2. a kind of commercial vehicle automatic mechanical transmission according to claim 1 is started to walk, it is special Sign is that the acceleration a is determined by following formula (1):Wherein, VBefFor the speed before shift, VAftFor the speed after shift, t is shift time, unit s.
- The gear output control method 3. a kind of commercial vehicle automatic mechanical transmission according to claim 1 is started to walk, it is special Sign is, step B, the driving force FtIt is determined based on following formula (2):Wherein, TtqFor engine torque, iAFor power train transmission ratio, η is power train gross efficiency, and r is tire radius.
- The gear output control method 4. a kind of commercial vehicle automatic mechanical transmission according to claim 1 is started to walk, it is special Sign is, step B, the driving force FwIt is determined based on following formula (3):Wherein, CDFor coefficient of air resistance, A is the front face area of vehicle, and ρ is atmospheric density, and V is the current driving speed of vehicle.
- The gear output control method 5. a kind of commercial vehicle automatic mechanical transmission according to claim 1 is started to walk, it is special Sign is that step C, the complete vehicle quality is determined based on following formula (4):Wherein, m is complete vehicle quality, FtFor the driving force on wheel, FwFor the air drag that wheel is subject to, α is value of slope, and λ is rotation Turn inertia coeffeicent, fRFor coefficient of rolling resistance, a is acceleration.
- The gear output control method 6. a kind of commercial vehicle automatic mechanical transmission according to claim 1 is started to walk, it is special Sign is, step E, and the highest starts to walk gear ratios i1It is determined based on following formula (5):Wherein, WDFor work of slipping, r is Rolling radius of driving wheel, and G is automobile gross mass, and sin θ is gradient sine value, and f is to roll resistance Force coefficient, McFor clutch input torque, η is power train gross efficiency, i0For driver speed ratio, n turns for maximum engine torque point Speed.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110925331A (en) * | 2020-01-21 | 2020-03-27 | 雷沃重工股份有限公司 | Mechanical clutch control method and device and vehicle |
| CN111140651A (en) * | 2020-01-21 | 2020-05-12 | 厦门金龙联合汽车工业有限公司 | Climbing gear shifting strategy of two-gear automatic transmission vehicle |
| CN111619368A (en) * | 2020-05-29 | 2020-09-04 | 三一专用汽车有限责任公司 | Vehicle starting control method and cargo vehicle |
| CN112081912A (en) * | 2020-09-25 | 2020-12-15 | 一汽解放汽车有限公司 | Static gear shifting control method and static gear shifting control system |
| CN112096852A (en) * | 2020-09-27 | 2020-12-18 | 吉林大学 | Method for designing gear shifting rule of automatic transmission with super-multi-gear |
| CN112594079A (en) * | 2020-12-07 | 2021-04-02 | 一汽解放汽车有限公司 | Method and device for determining rotational speed economic region of engine, vehicle and storage medium |
| CN112728069A (en) * | 2020-12-25 | 2021-04-30 | 威伯科汽车控制系统（中国）有限公司 | Method and system for selecting proper starting gear |
| CN112924064A (en) * | 2021-01-27 | 2021-06-08 | 东风汽车股份有限公司 | Method for testing transmission efficiency of automobile transmission system |
| CN112924186A (en) * | 2021-01-27 | 2021-06-08 | 东风汽车股份有限公司 | Method for testing dynamic property of automobile transmission system |
| CN114312806A (en) * | 2020-09-30 | 2022-04-12 | 陕西汽车集团有限责任公司 | Method for judging vehicle load state |
| CN114423975A (en) * | 2019-09-26 | 2022-04-29 | 五十铃自动车株式会社 | Gear shifting device, vehicle and gear shifting method |
| CN114450509A (en) * | 2019-09-26 | 2022-05-06 | 五十铃自动车株式会社 | Gear control device, vehicle and gear control method |
| CN114658838A (en) * | 2022-03-22 | 2022-06-24 | 陕西法士特齿轮有限责任公司 | Automatic transmission gear control method and computer program product |
| CN116101291A (en) * | 2022-12-30 | 2023-05-12 | 瑞修得信息科技(无锡)有限公司 | Method and device for reminding vehicle climbing oil consumption |
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| CN114423975B (en) * | 2019-09-26 | 2023-09-15 | 五十铃自动车株式会社 | Gear switching device, vehicle and gear switching method |
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| CN114423975A (en) * | 2019-09-26 | 2022-04-29 | 五十铃自动车株式会社 | Gear shifting device, vehicle and gear shifting method |
| CN114450509B (en) * | 2019-09-26 | 2023-08-15 | 五十铃自动车株式会社 | Gear control device, vehicle and gear control method |
| CN111140651A (en) * | 2020-01-21 | 2020-05-12 | 厦门金龙联合汽车工业有限公司 | Climbing gear shifting strategy of two-gear automatic transmission vehicle |
| CN110925331A (en) * | 2020-01-21 | 2020-03-27 | 雷沃重工股份有限公司 | Mechanical clutch control method and device and vehicle |
| CN111619368A (en) * | 2020-05-29 | 2020-09-04 | 三一专用汽车有限责任公司 | Vehicle starting control method and cargo vehicle |
| CN111619368B (en) * | 2020-05-29 | 2021-10-08 | 三一专用汽车有限责任公司 | Vehicle starting control method and cargo vehicle |
| CN112081912A (en) * | 2020-09-25 | 2020-12-15 | 一汽解放汽车有限公司 | Static gear shifting control method and static gear shifting control system |
| CN112081912B (en) * | 2020-09-25 | 2021-09-28 | 一汽解放汽车有限公司 | Static gear shifting control method and static gear shifting control system |
| CN112096852B (en) * | 2020-09-27 | 2021-05-25 | 吉林大学 | Method for designing gear shifting rule of automatic transmission with super-multi-gear |
| CN112096852A (en) * | 2020-09-27 | 2020-12-18 | 吉林大学 | Method for designing gear shifting rule of automatic transmission with super-multi-gear |
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| CN112594079A (en) * | 2020-12-07 | 2021-04-02 | 一汽解放汽车有限公司 | Method and device for determining rotational speed economic region of engine, vehicle and storage medium |
| CN112728069A (en) * | 2020-12-25 | 2021-04-30 | 威伯科汽车控制系统（中国）有限公司 | Method and system for selecting proper starting gear |
| CN112924186A (en) * | 2021-01-27 | 2021-06-08 | 东风汽车股份有限公司 | Method for testing dynamic property of automobile transmission system |
| CN112924064A (en) * | 2021-01-27 | 2021-06-08 | 东风汽车股份有限公司 | Method for testing transmission efficiency of automobile transmission system |
| CN114658838A (en) * | 2022-03-22 | 2022-06-24 | 陕西法士特齿轮有限责任公司 | Automatic transmission gear control method and computer program product |
| CN114658838B (en) * | 2022-03-22 | 2023-12-08 | 陕西法士特齿轮有限责任公司 | Automatic transmission gear control method and computer storage medium |
| CN116101291A (en) * | 2022-12-30 | 2023-05-12 | 瑞修得信息科技(无锡)有限公司 | Method and device for reminding vehicle climbing oil consumption |
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