CN111006009B - Gear shifting strategy suitable for climbing of automatic transmission vehicle - Google Patents
Gear shifting strategy suitable for climbing of automatic transmission vehicle Download PDFInfo
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- CN111006009B CN111006009B CN202010070364.2A CN202010070364A CN111006009B CN 111006009 B CN111006009 B CN 111006009B CN 202010070364 A CN202010070364 A CN 202010070364A CN 111006009 B CN111006009 B CN 111006009B
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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
- F16H59/18—Inputs being a function of torque or torque demand dependent on the position of the accelerator pedal
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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
-
- 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
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
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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
- F16H59/48—Inputs being a function of acceleration
-
- 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
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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
- F16H2312/00—Driving activities
- F16H2312/06—Creeping
Abstract
The invention provides a gear shifting strategy suitable for climbing of an automatic transmission vehicle, which judges the current speed of the vehicle when the opening degree of an accelerator pedal is larger than a target set value and the longitudinal acceleration of the vehicle is smaller than the target set value: when the actual speed is less than the gear shifting speed, the vehicle is in a climbing state, and the original gear shifting strategy is kept; when the actual speed is between the gear shifting speed and the first-gear maximum speed, the vehicle is in a climbing state, the gear of the vehicle is controlled to be in the first gear, and the maximum speed of the vehicle is limited; and when the actual speed is greater than the first-gear maximum speed, the vehicle keeps the original gear shifting strategy. According to the invention, under the condition of not additionally using other instruments and equipment, the gear shifting strategy in the vehicle climbing process is corrected according to the change condition of the accelerator pedal signal and the longitudinal acceleration value of the vehicle, and under the condition of not additionally increasing the cost of parts of the whole vehicle, frequent gear shifting in the vehicle climbing process is avoided, so that the driving comfort of the vehicle is improved.
Description
Technical Field
The invention relates to a gear shifting strategy of an electric vehicle, in particular to a gear shifting strategy suitable for climbing of an automatic transmission vehicle.
Background
With the rapid development of new energy vehicles, people have higher requirements on the riding comfort and reliability of the vehicles, and the gear shifting speed point of the electric vehicle matched with the automatic transmission is usually optimized and calculated according to the external characteristics of a driving motor and the speed ratio of each gear to obtain the optimal gear shifting speed, so that the pause and frustration in the gear shifting process are reduced. However, during the vehicle hill-climbing, the vehicle speed is changed due to the change of the slope and the load, which causes the vehicle to have frequent gear shifting, affects the riding comfort of passengers, and has certain damage to the actuating mechanism of the automatic transmission in the past.
Therefore, the optimization of the gear shifting strategy in the vehicle climbing process is significant. However, most of the existing correction methods for the vehicle hill-shift strategy need to judge the current state of the vehicle by means of additional instruments and calculate the vehicle requirements, although the current state of the vehicle can be calculated more accurately by using the instruments and devices, the cost of parts of the whole vehicle is increased, and the total production cost is increased in the process of mass production of the vehicle. If a low-cost and reasonable method for correcting the gear shifting strategy in the vehicle climbing process can be provided, the production cost can be greatly reduced.
Disclosure of Invention
The invention provides a climbing gear shifting strategy of an automatic transmission vehicle, which aims to overcome the defects that the cost of parts of the whole vehicle is increased and the like due to the fact that the current state of the vehicle is judged and the vehicle demand is calculated by means of auxiliary equipment in the conventional gear shifting strategy correcting method.
The invention adopts the following technical scheme:
a gear shift strategy for uphill climbing of an automatic transmission vehicle, comprising the steps of: s1, in the running process of the vehicle, calculating the longitudinal acceleration value of the vehicle at the current time point in a certain calculation period, judging whether to correct the current gear shifting strategy of the vehicle or not by combining the opening degree of an accelerator pedal, if so, entering S2, and if not, keeping the original gear shifting strategy; s2, correcting the current gear shifting strategy of the vehicle by combining the current driving speed of the vehicle; and S3, in a certain calculation period, monitoring the opening of an accelerator pedal, the speed of the vehicle and the output torque of a motor, and enabling the vehicle to exit the current gear shifting mode after the gear shifting strategy is modified and the set conditions are met.
The step S1 is specifically performed as follows: (1) judging the driving intention of the driver by utilizing the change trend and the opening degree of the accelerator pedal, and judging the current driving state of the vehicle by combining with real-time vehicle speed information; (2) calculating the longitudinal acceleration value of the vehicle at the current time point by utilizing the vehicle speed; (3) entering a next judgment condition when the opening degree of the accelerator pedal reaches a target set value and the longitudinal acceleration of the vehicle is continuously smaller than the target set value in a fixed period; if the conditions are not met, the gear shifting strategy of the vehicle is not corrected, namely the vehicle keeps the original gear shifting strategy.
Further, the target value of the accelerator opening is set with reference to the external characteristic of the drive motor matched to the vehicle and the vehicle full load mass setting.
Further, the above-described target setting value of the vehicle longitudinal acceleration is set with reference to the external characteristic of the drive motor to which the vehicle is matched and the 65% load mass of the vehicle.
Preferably, the time during which the longitudinal acceleration of the vehicle continues to be less than the target set value is set to 5 s.
When the opening degree of an accelerator pedal, the longitudinal acceleration of the vehicle and the duration time do not accord with any set conditions, the gear shifting strategy of the vehicle is not corrected, namely the vehicle keeps the original gear shifting state.
The step S2 is specifically performed as follows: (1) if the current speed of the vehicle is less than the optimal gear shifting speed of the vehicle, the gear shifting strategy of the vehicle is not corrected, namely the vehicle keeps the original gear shifting strategy; (2) if the current vehicle speed of the vehicle is between the optimal gear shifting vehicle speed and the first-gear peak vehicle speed, modifying the gear shifting strategy of the vehicle to enable the gear of the automatic transmission of the vehicle to be always controlled to be in the first gear, namely, not shifting gears, and simultaneously limiting the highest vehicle speed of the vehicle; (3) and if the current vehicle speed of the vehicle is greater than the peak vehicle speed of the first gear, the gear shifting strategy of the vehicle is not corrected, namely the vehicle keeps the original gear shifting strategy.
Specifically, the optimal gear shifting speed point of the vehicle refers to a drive Map of the drive motor, and is combined with the transmission ratio of each gear of the automatic transmission, so that the gear shifting speed point of the drive motor is determined under the condition that the vehicle dynamic property and the economical efficiency are comprehensively considered, the output torque of the assembly end does not have large difference before and after gear shifting, and the jerk in the gear shifting process is reduced, and the optimal gear shifting speed is determined.
The step S2 is specifically performed as follows: (1) when the output torque amplitude of the motor end exceeds a set target value in the running process of the vehicle, exiting the current gear shifting mode, namely executing an original gear shifting strategy; (2) and when the vehicle speed is reduced to 0, exiting the current gear shifting mode, namely executing the original gear shifting strategy.
Specifically, the motor-side output torque reduction amplitude needs to calculate a difference percentage between a maximum torque value corresponding to the external characteristic of the driving motor at the motor rotation speed corresponding to the optimal gear shifting speed and a minimum torque value corresponding to the external characteristic of the driving motor, and the calculated difference percentage is subjected to a method by combining with test experience to obtain a target reduction amplitude.
As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following advantages:
according to the invention, under the condition of not additionally using other instruments, the gear shifting strategy of the current vehicle is corrected by utilizing the opening degree of an accelerator pedal and the longitudinal acceleration value of the current vehicle and combining the vehicle speed. The gear shifting strategy is simpler, the gear selection strategy is optimized, frequent gear shifting in the vehicle ramp driving process can be avoided under the condition that the vehicle manufacturing cost is not additionally increased, and the driving comfort is improved.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings. Numerous details are set forth below in order to provide a thorough understanding of the present invention, but it will be apparent to those skilled in the art that the present invention may be practiced without these details. Well-known components, methods and processes are not described in detail below.
The present invention corrects the gear shift strategy of the current vehicle based on the opening of the accelerator pedal and the longitudinal acceleration value of the current vehicle in combination with the vehicle speed, and the present invention will be described with reference to fig. 1, specifically, the present invention is performed as follows:
step 1: in the running process of the vehicle, calculating a longitudinal acceleration value of the vehicle at the current time point in a certain calculation period, judging whether to modify the current gear shifting strategy of the vehicle or not by combining the opening degree of an accelerator pedal, if so, entering the step 2, and if not, keeping the original gear shifting strategy;
step 2: correcting the current gear shifting strategy of the vehicle by combining the current driving speed of the vehicle;
and step 3: in a certain calculation period, the vehicle is enabled to exit from the current gear shifting mode after gear shifting strategy modification is completed through monitoring of the opening degree of an accelerator pedal, the vehicle speed and the output torque of a motor under the condition that set conditions are met.
The step 1 is specifically carried out according to the following method: and 1.1, judging the driving intention of the driver by utilizing the change trend and the opening degree of the accelerator pedal, and judging the current driving state of the vehicle by combining real-time vehicle speed information. And 1.2, calculating the longitudinal acceleration value of the vehicle at the current time point by using the vehicle speed. 1.3, entering a next judgment condition when the opening degree of an accelerator pedal reaches a target set value and the longitudinal acceleration of the vehicle is continuously smaller than the target set value in a fixed period; if the conditions are not met, the gear shifting strategy of the vehicle is not corrected, namely the vehicle keeps the original gear shifting strategy.
The target value of the accelerator opening is set with reference to the external characteristics of the drive motor matched with the vehicle and the design mass of the full load of the vehicle, and in the embodiment, the target value of the accelerator opening is set to 80%.
The above-mentioned target setting value of the vehicle longitudinal acceleration is set with reference to the external characteristics of the drive motor matched to the vehicle and the 65% load mass of the vehicle, and in the present embodiment, the target value of the vehicle longitudinal acceleration is set to 0.3m/s2。
The time during which the vehicle longitudinal acceleration is less than the target set value is set to 5s in this embodiment. When the opening degree of an accelerator pedal is more than 80 percent and the longitudinal acceleration of the vehicle lasts for 5s and is less than 0.3m/s2And entering the next judgment link.
When the opening degree of an accelerator pedal, the longitudinal acceleration of the vehicle and the duration time do not accord with any set conditions, the gear shifting strategy of the vehicle is not corrected, namely the vehicle keeps the original gear shifting state.
The step 2 is specifically carried out according to the following method:
and 2.1, if the current speed of the vehicle is less than the optimal gear shifting speed of the vehicle, not correcting the gear shifting strategy of the vehicle, namely, keeping the original gear shifting strategy of the vehicle.
The optimal gear shifting speed point of the vehicle refers to a driving Map of a driving motor, and is combined with the transmission ratio of each gear of the automatic transmission, under the condition that the dynamic property and the economical efficiency of the vehicle are comprehensively considered, the output torque of the assembly end before and after gear shifting is not greatly different, and the jerk in the gear shifting process is reduced, the gear shifting speed point of the driving motor is determined, so that the optimal gear shifting speed is determined, and the optimal gear shifting speed point is set to be V1 in the embodiment.
2.2, if the current vehicle speed of the vehicle is between the optimal gear shifting vehicle speed V1 and the first gear peak vehicle speed VmaxIn the meantime, the gear shifting strategy of the vehicle is corrected, so that the gear of the automatic transmission of the vehicle is always controlled to be in the first gear, namely, the gear shifting is not carried out, and meanwhile, the highest speed of the vehicle is limited.
In this state, the maximum driving speed of the vehicle is limited by considering the protection of the driving motor, and the vehicle speed value at the maximum safe continuous working rotating speed of the motor is obtained by calculating the first gear transmission ratio of the automatic transmission and the transmission ratio of the main reducer, wherein the maximum vehicle speed is limited to V in the embodimentmax-2。
2.3, if the current speed of the vehicle is greater than the peak speed V of the first gearmaxAnd if so, not correcting the gear shifting strategy of the vehicle, namely, keeping the original gear shifting strategy of the vehicle.
Step 3 is to exit the current shift mode when the vehicle needs to meet the relevant conditions after the vehicle is modified in the step 2.2, and specifically performed according to the following method:
and 3.1, in the running process of the vehicle, when the output torque amplitude of the motor end exceeds a set target value, exiting the current gear shifting mode, namely executing the original gear shifting strategy.
The output torque amplitude reduction at the motor end needs to calculate the difference percentage between the maximum torque value corresponding to the external characteristic of the driving motor and the minimum torque value corresponding to the external characteristic of the driving motor according to the motor rotating speed corresponding to the optimal gear shifting speed, and the calculated difference percentage is processed by a method according to test experience to obtain a target amplitude reduction value, wherein the target value of the output torque amplitude reduction at the motor end is set to be 25% in the embodiment.
And 3.2, when the vehicle speed is reduced to 0, exiting the current gear shifting mode, namely executing the original gear shifting strategy.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.
Claims (9)
1. A gear shift strategy adapted for uphill climbing of an automatic transmission vehicle, comprising the steps of:
s1, in the running process of the vehicle, calculating the longitudinal acceleration value of the vehicle at the current time point in a certain calculation period, judging whether to correct the current gear shifting strategy of the vehicle or not by combining the opening degree of an accelerator pedal, if so, entering S2, and if not, keeping the original gear shifting strategy; the method comprises the following steps: (1) judging the driving intention of the driver by utilizing the accelerator opening degree variation trend and the accelerator opening degree, and judging the current driving state of the vehicle by combining with real-time vehicle speed information; (2) calculating the longitudinal acceleration of the vehicle at the current time point by using the vehicle speed; (3) entering a next judgment condition when the opening of the accelerator pedal reaches a target set value and the longitudinal acceleration of the vehicle is continuously smaller than the target set value in a fixed period; if the condition is not met, the gear shifting strategy of the vehicle is not corrected, namely the vehicle keeps the original gear shifting strategy;
s2, correcting the current gear shifting strategy of the vehicle by combining the current driving speed of the vehicle;
and S3, in a certain calculation period, monitoring the opening of an accelerator pedal, the speed of the vehicle and the output torque of a motor end, and enabling the vehicle to exit the current gear shifting mode after the gear shifting strategy is modified and the set conditions are met.
2. A gear shift strategy adapted for uphill grade climbing of an automatic transmission vehicle as claimed in claim 1, wherein: the target set value of the opening degree of the accelerator pedal is set with reference to the external characteristics of the drive motor matched with the vehicle and the full-load mass of the vehicle.
3. A gear shift strategy adapted for uphill grade climbing of an automatic transmission vehicle as claimed in claim 1, wherein: the target set value of the vehicle longitudinal acceleration is set with reference to the driving motor external characteristics matched with the vehicle and the 65% load mass of the vehicle.
4. A gear shift strategy adapted for uphill grade climbing of an automatic transmission vehicle as claimed in claim 1, wherein: the duration for which the vehicle longitudinal acceleration continues to be less than the target set value is set to 5 s.
5. A gear shifting strategy adapted for uphill climbing of an automatic transmission vehicle as defined in claim 4, wherein: and when any one of the opening degree of the accelerator pedal, the longitudinal acceleration of the vehicle and the duration time does not meet the condition, the gear shifting strategy of the vehicle is not corrected, namely the vehicle keeps the original gear shifting strategy.
6. A gear shifting strategy adapted for uphill grades in automatic transmission vehicles according to claim 1, characterized in that said step S2 is carried out in particular as follows: (1) if the current speed of the vehicle is less than the optimal gear shifting speed of the vehicle, the gear shifting strategy of the vehicle is not corrected, namely the vehicle keeps the original gear shifting strategy; (2) if the current vehicle speed of the vehicle is between the optimal gear shifting vehicle speed and the first-gear peak vehicle speed, modifying the gear shifting strategy of the vehicle to enable the gear of the automatic transmission of the vehicle to be always controlled to be in the first gear, namely, not shifting gears, and simultaneously limiting the highest vehicle speed of the vehicle; (3) and if the current vehicle speed of the vehicle is greater than the peak vehicle speed of the first gear, the gear shifting strategy of the vehicle is not corrected, namely the vehicle keeps the original gear shifting strategy.
7. A gear shift strategy adapted for uphill climbing of an automatic transmission vehicle as defined in claim 6, wherein: the optimal gear shifting speed of the vehicle refers to a driving Map of a driving motor, is combined with the transmission ratio of each gear of an automatic transmission, comprehensively considers the dynamic property and the economical efficiency of the vehicle, enables the output torque of an assembly end to have no large difference before and after gear shifting, and determines the gear shifting rotating speed point of the driving motor under the condition of reducing the pause and frustration in the gear shifting process, so that the optimal gear shifting speed is determined.
8. A gear shifting strategy adapted for uphill grades in automatic transmission vehicles according to claim 1, characterized in that said step S3 is carried out in particular as follows: (1) when the output torque amplitude of the motor end exceeds a set target value in the running process of the vehicle, exiting the current gear shifting mode, namely executing an original gear shifting strategy; (2) and when the vehicle speed is reduced to 0, exiting the current gear shifting mode, namely executing the original gear shifting strategy.
9. A gear shift strategy adapted for uphill climbing of an automatic transmission vehicle as defined in claim 8, wherein: the output torque amplitude reduction at the motor end needs to calculate the difference percentage between the maximum torque value corresponding to the external characteristic of the driving motor at the motor rotating speed corresponding to the optimal gear shifting speed and the minimum torque value corresponding to the external characteristic of the driving motor, and optimize the calculated difference percentage by combining with test experience to obtain the output torque at the motor end.
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| CN202010070364.2A CN111006009B (en) | 2020-01-21 | 2020-01-21 | Gear shifting strategy suitable for climbing of automatic transmission vehicle |
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| CN111006009B true CN111006009B (en) | 2021-05-14 |
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| CN113389890B (en) * | 2021-07-28 | 2022-10-28 | 潍柴动力股份有限公司 | Method for determining climbing gear and related device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996784A (en) * | 2012-11-29 | 2013-03-27 | 浙江吉利汽车研究院有限公司杭州分公司 | Urgent speed reducing and gear shifting control method and system of automatic transmission |
| CN103438203A (en) * | 2013-08-28 | 2013-12-11 | 长城汽车股份有限公司 | Method for controlling automatic gearbox in downhill working condition |
| CN103527768A (en) * | 2013-11-01 | 2014-01-22 | 北京理工大学 | Gear determining method based on heavy AMT vehicle road load estimation |
| CN103982643A (en) * | 2014-05-27 | 2014-08-13 | 盛瑞传动股份有限公司 | Automobile, ramp gear-shifting control method and system of automatic transmission of automobile |
| CN105889492A (en) * | 2016-05-25 | 2016-08-24 | 宁波吉利汽车研究开发有限公司 | Control method for restraining gear shifting circulation of gearbox |
| CN106931156A (en) * | 2015-09-18 | 2017-07-07 | 福特全球技术公司 | Terrain self-adaptive gearshift plan |
| CN107100993A (en) * | 2017-05-08 | 2017-08-29 | 合肥工业大学 | The fluid drive gearshift modification method that a kind of vehicle mass is recognized with hill gradient |
| CN109163086A (en) * | 2018-11-02 | 2019-01-08 | 盛瑞传动股份有限公司 | The modification method and system of Shifting |
| CN109882587A (en) * | 2019-01-31 | 2019-06-14 | 中国北方车辆研究所 | Special vehicle self shifter control system and method based on equivalent drag coefficient |
| CN110195780A (en) * | 2019-04-29 | 2019-09-03 | 东风商用车有限公司 | A kind of heavy goods vehicles automatic gear-box ramp shift control method |
-
2020
- 2020-01-21 CN CN202010070364.2A patent/CN111006009B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996784A (en) * | 2012-11-29 | 2013-03-27 | 浙江吉利汽车研究院有限公司杭州分公司 | Urgent speed reducing and gear shifting control method and system of automatic transmission |
| CN103438203A (en) * | 2013-08-28 | 2013-12-11 | 长城汽车股份有限公司 | Method for controlling automatic gearbox in downhill working condition |
| CN103527768A (en) * | 2013-11-01 | 2014-01-22 | 北京理工大学 | Gear determining method based on heavy AMT vehicle road load estimation |
| CN103982643A (en) * | 2014-05-27 | 2014-08-13 | 盛瑞传动股份有限公司 | Automobile, ramp gear-shifting control method and system of automatic transmission of automobile |
| CN106931156A (en) * | 2015-09-18 | 2017-07-07 | 福特全球技术公司 | Terrain self-adaptive gearshift plan |
| CN105889492A (en) * | 2016-05-25 | 2016-08-24 | 宁波吉利汽车研究开发有限公司 | Control method for restraining gear shifting circulation of gearbox |
| CN107100993A (en) * | 2017-05-08 | 2017-08-29 | 合肥工业大学 | The fluid drive gearshift modification method that a kind of vehicle mass is recognized with hill gradient |
| CN109163086A (en) * | 2018-11-02 | 2019-01-08 | 盛瑞传动股份有限公司 | The modification method and system of Shifting |
| CN109882587A (en) * | 2019-01-31 | 2019-06-14 | 中国北方车辆研究所 | Special vehicle self shifter control system and method based on equivalent drag coefficient |
| CN110195780A (en) * | 2019-04-29 | 2019-09-03 | 东风商用车有限公司 | A kind of heavy goods vehicles automatic gear-box ramp shift control method |
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