CN106151493A - Automatic catch automobile dynamical system control method - Google Patents
Automatic catch automobile dynamical system control method Download PDFInfo
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- CN106151493A CN106151493A CN201510146429.6A CN201510146429A CN106151493A CN 106151493 A CN106151493 A CN 106151493A CN 201510146429 A CN201510146429 A CN 201510146429A CN 106151493 A CN106151493 A CN 106151493A
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- 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
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Abstract
The invention provides a kind of automatic catch automobile dynamical system control method, it controls the engine speed during upshift by the pressure of control engine output torque and lockup clutch of converter in shift process.By controlling the engine output torque in shift process and the pressure of lockup clutch of converter, the control method of the present invention can make engine speed be maintained in a constant scope, thus driver will not perceive shift process by the change of engine speed, the inertia torque impact on gearshift can be effectively reduced, be also not result in the negative interactions such as insufficient, reduction fuel oil service efficiency that burn simultaneously.
Description
Technical field
The present invention relates to technical field of automobile control；Specifically, the present invention relates to a kind of automatic catch automobile dynamical system control method.
Background technology
It is known that do not have clutch between the electromotor of automatic catch automobile and change speed gear box, the connection between them is realized by fluid torque-converter.The effect of fluid torque-converter include transmitting rotating speed and moment of torsion and make between electromotor and automatic gear-box be connected to become nonrigid to facilitate self shifter.
Fig. 1 is the traditional shift process schematic diagram according to prior art.In FIG, reference 1 represents engine speed graph, and 2 represent turbine speed curves, and 3 represent engine torque curve.Automatic catch automobile is during upshift, and due to the difference of gear ratio between different gears, the secondary speed of fluid torque-converter can decline during upshift, and engine speed can decline along with the decline of transformer turbine rotating speed.So, driver can perceive occurent gearshift by the reduction of engine speed on instrumental panel, simultaneously because engine speed reduces the inertia torque impact brought, gearshift needs during controlling that electromotor carries out fall and turns round control, perfect cooperation engine speed can not decline if fall turns round control, be just very easy to begin to decline at rotating speed and decline the stage generation shift shock of end.
During the dynamical system of traditional automatic catch automobile upshift process controls, will not deliberately control engine speed, so engine speed can reduce along with the reduction of transformer turbine rotating speed, the shift shock caused for inertia torque during overcoming engine speed to reduce, Transmission Control Module can ask engine control module to reduce output moment of torsion, the impact of balancing inertia moment of torsion of electromotor by postponing the methods such as ignition advance angle.But, to postpone ignition advance angle and can cause insufficient, reduction fuel oil service efficiency of burning, the most insufficient burning also can bring more carbon monoxide and nitrogen oxides, increase ternary catalyzing unit burden and increase exhaust emissions amount.
Summary of the invention
It is an object of the invention to provide a kind of automobile dynamic system control method that can overcome aforementioned prior art problem.
The present invention has been achieved through the following technical solutions the object defined above of the present invention, wherein, the present solution provides a kind of automatic catch automobile dynamical system control method, described automobile dynamic system includes electromotor, fluid torque-converter and change speed gear box and engine control module and Transmission Control Module, in shift process:
According to engine rotational speed signal and accelerator pedal signal, described engine control module determines that driver expects moment of torsion, and described driver expecting, engine rotational speed signal when moment of torsion and gearshift start is sent to described Transmission Control Module；
According to described driver, described Transmission Control Module expects that moment of torsion, the GES of automobile, current shift speed ratio, target gear speed ratio, design gearshift opportunity and shift duration calculate the satisfied engine target moment of torsion required of shifting gears in real time and be sent to described engine control module, described engine control module meets the engine torque of requirement of shifting gears according to the engine target torque request output that described Transmission Control Module sends；
Described Transmission Control Module calculates the lock-up clutch of described fluid torque-converter in real time and controls pressure signal, and lock-up clutch pressure-control valve exports lock-up clutch pressure according to described lock-up clutch pressure controling signal.
Alternatively, in foregoing control method, when speed reaches upshift shifting points, engine rotational speed signal time being shifted gears by engine speed sensor record by described engine control module, is recorded described current shift speed ratio, described target gear speed ratio and described design by described Transmission Control Module and shifts gears opportunity.
Alternatively, in foregoing control method, calculate described engine target torquing step and include:
Respectively keep off speed ratio according to speed, change speed gear box, target turbine rotating speed that shift time determines in shift process；
Respectively keep off speed ratio, shift time and driver according to change speed gear box and expect that engine output torque determines change speed gear box target output torque；
Vehicle target acceleration is calculated, according to vehicle target acceleration calculation engine target rotating speed according to change speed gear box target output torque；
Target slippage is determined according to engine target rotating speed and target turbine rotating speed；
Fluid torque-converter rotating speed of target ratio and target torque ratio is determined according to target slippage；And
Target engine torque is determined than with change speed gear box target output torque according to fluid torque-converter target torque.
Alternatively, in foregoing control method, the computing formula of described target turbine rotating speed is:
WhereinRepresent target turbine rotating speed, representSpeed,Represent that vehicle travels the number of turns that one kilometer of wheel turns over,Represent when front speed ratio,Represent targeted gear speed ratio,Represent the most lasting shift time,Represent design shift time.
Alternatively, in foregoing control method, the computing formula of described change speed gear box target output torque is:
WhereinRepresent change speed gear box target output torque, representThe desired engine output torque of driver.
Alternatively, in foregoing control method, the computing formula of described engine target rotating speed is:
WhereinRepresent engine target rotating speed,Represent engine speed when gearshift starts,Represent vehicle target acceleration.
Alternatively, in foregoing control method, the computing formula of described target slippage is:
WhereinRepresent target slippage.
Alternatively, in foregoing control method, the computing formula of described rotating speed of target ratio is:
WhereinRepresent fluid torque-converter rotating speed of target ratio, fluid torque-converter target torque ratioDetermined than with fluid torque-converter characteristic curve by fluid torque-converter rotating speed of target.
Alternatively, in foregoing control method, the computing formula of described target engine torque is:
WhereinTarget engine torque for satisfied gearshift needs.
By it will be seen that above, during automobile dynamic system control method according to the present invention can keep upshift, engine speed does not declines, by controlling the engine output torque in shift process and the pressure of lockup clutch of converter, make engine speed be maintained in a constant scope, thus driver will not perceive shift process by the change of engine speed；Simultaneously because engine speed does not reduces in shift process, the inertia torque impact on gearshift can be effectively reduced, reduce the fall in shift process to turn round demand, farthest reduce shift shock, be not result in the negative interactions such as insufficient, reduction fuel oil service efficiency that burn simultaneously.
Accompanying drawing explanation
Referring to the drawings, the disclosure will become more obvious.It is to be appreciated that these accompanying drawings are intended solely for illustrative purposes, and it is not intended to limit protection scope of the present invention.In figure:
Fig. 1 is the traditional shift process schematic diagram according to prior art；
Fig. 2 is the schematic diagram that the automobile dynamic system according to an embodiment of the invention controls process；And
Fig. 3 is the shift process schematic diagram controlling automobile dynamic system according to previously described embodiment of the invention.
Detailed description of the invention
Describe the detailed description of the invention of the present invention below in conjunction with the accompanying drawings in detail.
Fig. 2 is the schematic diagram that the automobile dynamic system according to an embodiment of the invention controls process.From figure 2 it can be seen that automobile dynamic system control method is that the pressure of the engine output torque by controlling in shift process and lockup clutch of converter controls engine speed during upshift in the present invention.Specifically, it is illustrated that the method in embodiment may comprise steps of:
1) by engine speed and the accelerator pedal signal input engine control module of gearshift start time, engine control module, according to the relation between engine speed, accelerator pedal signal and the engine torque of design, exports the desired engine output torque of driver.
2) respectively keep off speed ratio according to speed, change speed gear box, target turbine rotating speed that shift time determines in shift process, the computing formula of secondary speed is:
WhereinRepresent secondary speed, representSpeed,Represent that vehicle travels the number of turns that one kilometer of wheel turns over,Represent when front speed ratio,Represent targeted gear speed ratio,Represent the most lasting shift time,Represent design shift time.
3) respectively keep off speed ratio, shift time and driver according to change speed gear box and expect that engine output torque determines that change speed gear box target output torque, the computing formula of change speed gear box target output torque are:
WhereinRepresent change speed gear box target output torque, representThe desired engine output torque of driver.
4) vehicle target acceleration is calculated according to change speed gear box target output torque
5) according to vehicle target acceleration calculation engine target rotating speed, the computing formula of engine target rotating speed is:
WhereinRepresent engine target rotating speed,Represent engine speed when gearshift starts.
6) determine that target slippage, the computing formula of target slippage are according to engine target rotating speed and target turbine rotating speed:
WhereinRepresent target slippage.
7) determining fluid torque-converter rotating speed of target ratio and target torque ratio according to target slippage, the computing formula of rotating speed of target ratio is:
Represent fluid torque-converter rotating speed of target ratio, fluid torque-converter target torque ratioDetermined than with fluid torque-converter characteristic curve by fluid torque-converter rotating speed of target.
8) determining target engine torque according to fluid torque-converter target torque than with change speed gear box target output torque, the computing formula of target engine torque is:
WhereinTarget engine torque for satisfied gearshift needs.
9) Transmission Control Module sends moment of torsion control request according to target engine torque obtained above to engine control module, and engine control module controls the moment of torsion needed in request output shift process according to the moment of torsion of change speed gear box module.
10) Transmission Control Module controls electromagnetic valve according to target slip control lockup clutch of converter, the oil pressure on lock-up clutch is controlled by lockup clutch of converter electromagnetic valve, at speed ratio transformation process, secondary speed declines, target slippage increases, and reduces the oil pressure on lock-up clutch；After speed ratio converts, secondary speed rises, and target slippage reduces the oil pressure increased on lock-up clutch, makes the speed discrepancy between turbine and electromotor meet target slippage requirement, so that engine speed meets the requirement of target engine speed.
According to it will be seen that above, when speed reaches upshift shifting points, engine speed when engine control module is started by the gearshift of engine speed sensor signal record, Transmission Control Module records current shift speed ratio and target gear speed ratio and design gearshift opportunity.In shift process, according to engine rotational speed signal and accelerator pedal signal, engine control module determines that driver expects moment of torsion, driver is expected, and engine rotational speed signal when moment of torsion and gearshift start is sent to Transmission Control Module, Transmission Control Module expects moment of torsion according to driver, GES, current shift speed ratio, target gear speed ratio, design gearshift opportunity and shift duration, the engine target moment of torsion calculating satisfied gearshift requirement in real time is sent to engine control module, the engine target torque request output that engine control module sends according to Transmission Control Module meets the engine torque that gearshift requires；Transmission Control Module calculates target engine speed, target turbine rotating speed, target slippage and lock-up clutch control pressure signal in real time simultaneously, and lock-up clutch pressure-control valve exports lock-up clutch pressure according to lock-up clutch pressure controling signal.
Fig. 3 is the shift process schematic diagram controlling automobile dynamic system according to previously described embodiment of the invention.In figure 3, reference 1' represents that engine speed graph, 2' represent that turbine speed curves, 3' represent engine torque curve.It will be seen that from figure, during the automobile dynamic system control method of the present invention can keep upshift effectively, engine speed does not declines, by controlling the engine output torque in shift process and the pressure of lockup clutch of converter, make engine speed be maintained in a constant scope, thus driver will not perceive shift process by the change of engine speed；Simultaneously because engine speed does not reduces in shift process, it is possible to be effectively reduced the inertia torque impact on gearshift, reduce the fall in shift process and turn round demand, farthest reduce shift shock.
If the front description carried out the preferred embodiment of the present invention with reference to the accompanying drawings is only exemplary and explanat；Those skilled in the art also is able to be equal to the preferred embodiment of the present invention or the accommodation of similar type or remodeling under teaching herein, and these are flexible or remodeling also will fall in the protection domain covered by claims of the present invention.
Claims (9)
1. an automatic catch automobile dynamical system control method, described automobile dynamic system includes electromotor, fluid torque-converter and change speed gear box and engine control module and Transmission Control Module, it is characterised in that in shift process:
According to engine rotational speed signal and accelerator pedal signal, described engine control module determines that driver expects moment of torsion, and described driver expecting, engine rotational speed signal when moment of torsion and gearshift start is sent to described Transmission Control Module；
According to described driver, described Transmission Control Module expects that moment of torsion, the GES of automobile, current shift speed ratio, target gear speed ratio, design gearshift opportunity and shift duration calculate the satisfied engine target moment of torsion required of shifting gears in real time and be sent to described engine control module, described engine control module meets the engine torque of requirement of shifting gears according to the engine target torque request output that described Transmission Control Module sends；
Described Transmission Control Module calculates the lock-up clutch of described fluid torque-converter in real time and controls pressure signal, and lock-up clutch pressure-control valve exports lock-up clutch pressure according to described lock-up clutch pressure controling signal.
2. control method as claimed in claim 1, wherein, when speed reaches upshift shifting points, engine rotational speed signal time being shifted gears by engine speed sensor record by described engine control module, is recorded described current shift speed ratio, described target gear speed ratio and described design by described Transmission Control Module and shifts gears opportunity.
3. control method as claimed in claim 1, wherein, calculates described engine target torquing step and includes:
Respectively keep off speed ratio according to speed, change speed gear box, target turbine rotating speed that shift time determines in shift process；
Respectively keep off speed ratio, shift time and driver according to change speed gear box and expect that engine output torque determines change speed gear box target output torque；
Vehicle target acceleration is calculated, according to vehicle target acceleration calculation engine target rotating speed according to change speed gear box target output torque；
Target slippage is determined according to engine target rotating speed and target turbine rotating speed；
Fluid torque-converter rotating speed of target ratio and target torque ratio is determined according to target slippage；And
Target engine torque is determined than with change speed gear box target output torque according to fluid torque-converter target torque.
4. control method as claimed in claim 3, wherein, the computing formula of described target turbine rotating speed is:
WhereinRepresent target turbine rotating speed, representSpeed,Represent that vehicle travels the number of turns that one kilometer of wheel turns over,Represent when front speed ratio,Represent targeted gear speed ratio,Represent the most lasting shift time,Represent design shift time.
5. control method as claimed in claim 3, wherein, the computing formula of described change speed gear box target output torque is:
WhereinRepresent change speed gear box target output torque, representThe desired engine output torque of driver.
6. control method as claimed in claim 3, wherein, the computing formula of described engine target rotating speed is:
WhereinRepresent engine target rotating speed,Represent engine speed when gearshift starts,Represent vehicle target acceleration.
7. control method as claimed in claim 3, wherein, the computing formula of described target slippage is:
WhereinRepresent target slippage.
8. control method as claimed in claim 3, wherein, the computing formula of described rotating speed of target ratio is:
WhereinRepresent fluid torque-converter rotating speed of target ratio, fluid torque-converter target torque ratioDetermined than with fluid torque-converter characteristic curve by fluid torque-converter rotating speed of target.
9. control method as claimed in claim 3, wherein, the computing formula of described target engine torque is:
WhereinTarget engine torque for satisfied gearshift needs.
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| CN107762644A (en) * | 2017-09-04 | 2018-03-06 | 宝沃汽车（中国）有限公司 | The control method of vehicle, device and there is its vehicle |
| CN109268489A (en) * | 2018-09-25 | 2019-01-25 | 浙江吉利变速器有限公司 | A kind of D grades of shift Learning Control Method |
| CN112061109A (en) * | 2020-09-03 | 2020-12-11 | 广西柳工机械股份有限公司 | Power transmission control method, device, vehicle and storage medium |
| CN112303225A (en) * | 2020-11-02 | 2021-02-02 | 东风汽车集团有限公司 | Method for improving gear-up comfort of small and medium accelerator opening degree of double-clutch automatic gearbox |
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| CN113602277A (en) * | 2021-08-20 | 2021-11-05 | 北京理工大学 | A Coordinated Control Method Based on Speed Control to Reduce Shift Impact |
| CN114684168A (en) * | 2022-05-06 | 2022-07-01 | 北京汽车集团越野车有限公司 | Wheel end driving torque determination method and device and vehicle |
| CN114738479A (en) * | 2022-04-26 | 2022-07-12 | 中国北方车辆研究所 | Safety control method for transmission device with ultra-wide transmission ratio range |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107762644A (en) * | 2017-09-04 | 2018-03-06 | 宝沃汽车（中国）有限公司 | The control method of vehicle, device and there is its vehicle |
| CN109268489A (en) * | 2018-09-25 | 2019-01-25 | 浙江吉利变速器有限公司 | A kind of D grades of shift Learning Control Method |
| CN109268489B (en) * | 2018-09-25 | 2020-09-15 | 浙江吉利变速器有限公司 | Self-learning control method for D-gear shifting |
| CN112061109A (en) * | 2020-09-03 | 2020-12-11 | 广西柳工机械股份有限公司 | Power transmission control method, device, vehicle and storage medium |
| CN112303225A (en) * | 2020-11-02 | 2021-02-02 | 东风汽车集团有限公司 | Method for improving gear-up comfort of small and medium accelerator opening degree of double-clutch automatic gearbox |
| CN112356842A (en) * | 2020-11-20 | 2021-02-12 | 苏州智加科技有限公司 | Gear adjusting method, gear adjusting device, gear adjusting equipment and storage medium of automatic driving vehicle |
| CN112356842B (en) * | 2020-11-20 | 2022-03-18 | 苏州智加科技有限公司 | Gear adjusting method, gear adjusting device, gear adjusting equipment and storage medium of automatic driving vehicle |
| CN113602277A (en) * | 2021-08-20 | 2021-11-05 | 北京理工大学 | A Coordinated Control Method Based on Speed Control to Reduce Shift Impact |
| CN113602277B (en) * | 2021-08-20 | 2023-11-03 | 北京理工大学 | A coordinated control method based on speed control to reduce shift shock |
| CN114738479A (en) * | 2022-04-26 | 2022-07-12 | 中国北方车辆研究所 | Safety control method for transmission device with ultra-wide transmission ratio range |
| CN114738479B (en) * | 2022-04-26 | 2023-12-22 | 中国北方车辆研究所 | Safety control method for transmission device with ultra-wide transmission ratio range |
| CN114684168A (en) * | 2022-05-06 | 2022-07-01 | 北京汽车集团越野车有限公司 | Wheel end driving torque determination method and device and vehicle |
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