CN114877066B - Automatic gearbox operation control method, automatic gearbox and vehicle - Google Patents
Automatic gearbox operation control method, automatic gearbox and vehicle Download PDFInfo
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- CN114877066B CN114877066B CN202210504152.XA CN202210504152A CN114877066B CN 114877066 B CN114877066 B CN 114877066B CN 202210504152 A CN202210504152 A CN 202210504152A CN 114877066 B CN114877066 B CN 114877066B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000007935 neutral effect Effects 0.000 claims abstract description 102
- 230000005540 biological transmission Effects 0.000 claims description 54
- 238000001514 detection method Methods 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 208000028659 discharge Diseases 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
- F16H59/24—Inputs being a function of torque or torque demand dependent on the throttle opening
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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
- 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
- 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
- F16H61/20—Preventing gear creeping ; Transmission control during standstill, e.g. hill hold control
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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
- F16H2061/0015—Transmission control for optimising fuel consumptions
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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
- F16H61/20—Preventing gear creeping ; Transmission control during standstill, e.g. hill hold control
- F16H2061/207—Preventing gear creeping ; Transmission control during standstill, e.g. hill hold control by neutral control
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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
- F16H2312/10—Inching
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The invention relates to a control method for the operation of an automatic gearbox, the automatic gearbox and a vehicle, wherein the control method comprises the following steps: acquiring a first running state parameter of a vehicle; judging whether the first running state parameter meets a first preset condition or not; according to the first running state parameter, the automatic gearbox is controlled to enter a neutral sliding state under the condition that a first preset condition is met; acquiring opening parameters of an accelerator pedal; judging whether the opening parameter meets a second preset condition or not; and controlling the automatic gearbox to exit the neutral sliding state according to the opening parameter meeting a second preset condition. The control method provided by the invention reduces the frequency of entering and exiting the neutral sliding mode, increases the time duty ratio of neutral sliding, reduces the oil consumption of the whole vehicle and improves the heat management performance.
Description
Technical Field
The invention relates to the technical field of vehicle gearboxes, in particular to a control method for operation of an automatic gearbox, the automatic gearbox and a vehicle.
Background
This section provides merely background information related to the present disclosure and is not necessarily prior art.
The electric control mechanical automatic gearbox (Automated Mechanical Transmission, AMT) does not need a driver to shift gears, so that the labor intensity is greatly reduced, the oil consumption can be saved, and the matching of vehicles with the AMT is more and more common. Neutral sliding is used as an optional control strategy of the AMT automatic gearbox, when a driver releases an accelerator pedal, the gearbox is placed in neutral gear through a control clutch, the resistance transmitted by a transmission system is reduced, the sliding distance of the whole vehicle is further, the purpose of saving oil is achieved, the engine returns to idling and maintains idle oil injection during neutral, the running speed and the exhaust gas flow of the engine are reduced, the reduction rate of the exhaust temperature of the engine is greatly reduced, the exhaust temperature level of the whole vehicle under the deceleration or fuel cut sliding working condition is ensured, and the thermal management difficulty and the exceeding discharge risk of the exhaust engine in six stages of China are reduced.
When the driver steps on the accelerator, the gearbox can quickly combine the clutch to change into corresponding gears. However, the driving habit of the driver often enables the gearbox to exit the neutral sliding mode for maintaining the speed point to step on the accelerator or stepping on the small accelerator opening, so that the entering and exiting times of the neutral sliding mode are more frequent, and the oil saving effect of the neutral sliding mode is not obvious.
Disclosure of Invention
The invention aims to at least solve the problem that the times of entering and exiting the neutral sliding mode are more frequent only because a driver frequently points to step on an accelerator.
The aim is achieved by the following technical scheme:
According to a first aspect of the present invention, there is provided a control method for operation of an automatic gearbox, the control method comprising: acquiring a first running state parameter of a vehicle; judging whether the first running state parameter meets a first preset condition or not; controlling the automatic gearbox to enter a neutral sliding state according to the first running state parameter meeting the first preset condition; acquiring opening parameters of an accelerator pedal; judging whether the opening parameter meets a second preset condition or not; and controlling the automatic gearbox to leave the neutral sliding state according to the opening parameter meeting the second preset condition.
According to the control method for the operation of the automatic gearbox, provided by the invention, by setting the second preset condition, when the opening parameter of the accelerator pedal meets the second preset condition, the automatic gearbox is controlled to exit the neutral sliding mode, so that the situation that a driver exits the neutral sliding mode only by stepping on the accelerator is avoided, the frequency of entering and exiting the neutral sliding mode is reduced, the time occupation ratio of the neutral sliding is increased, the fuel consumption of the whole vehicle is reduced, and the heat management performance is improved.
In addition, the control method for the operation of the automatic gearbox according to the invention can also have the following additional technical characteristics:
in some embodiments of the present invention, the opening degree parameter of the accelerator pedal includes: the percentage opening of the accelerator pedal; the meeting the second preset condition includes: the percentage opening of the accelerator pedal is larger than the first limit value and smaller than the second limit value and lasts for a first time period; or the percentage opening of the accelerator pedal is larger than a second limit value and lasts for a second time period; wherein the second limit is greater than the first limit and the first period of time is greater than the second period of time.
In some embodiments of the present invention, the opening degree parameter of the accelerator pedal includes: the change rate of the percentage opening of the accelerator pedal; the meeting the second preset condition includes: the change rate of the percentage opening of the accelerator pedal is larger than a third limit value and smaller than a fourth limit value and lasts for a third time period; or the change rate of the percentage opening of the accelerator pedal is larger than a fourth limit value and lasts for a fourth time period; wherein the fourth limit is greater than the third limit and the third time period is greater than the fourth time period.
In some embodiments of the invention, the first operating state parameter comprises: a travel speed, a gradient, an opening of the accelerator pedal, a rotational speed of an engine of the vehicle, a braking state of the vehicle, and a transmission operating mode of the vehicle;
The first operation state parameter meeting a first preset condition includes: the running speed is in a first preset speed range, the gradient is in a first preset gradient range, the opening of the accelerator pedal is smaller than a calibrated opening value, the rotating speed of an engine of the vehicle is smaller than a first calibrated rotating speed value, the vehicle is in an unbraked state, and a gearbox of the vehicle is in an automatic mode; wherein the calibrated opening value is smaller than the first limit value.
In some embodiments of the present invention, after the first operating state parameter satisfies a first preset condition, controlling the automatic gearbox to enter the neutral coasting state further includes: acquiring the running speed of the vehicle; judging whether the running speed is in a second preset speed range or not; if not, controlling the automatic gearbox to exit the neutral sliding state; the first preset speed range is within the second preset speed range.
In some embodiments of the present invention, after the first operating state parameter satisfies a first preset condition, controlling the automatic gearbox to enter the neutral coasting state further includes: acquiring the gradient of the vehicle; judging whether the gradient is in a second preset gradient range or not; if not, controlling the automatic gearbox to exit the neutral sliding state; the first preset gradient range is within the second preset gradient range.
In some embodiments of the present invention, after the first operating state parameter satisfies a first preset condition, controlling the automatic gearbox to enter the neutral coasting state further includes: acquiring the rotating speed of an engine of the vehicle; judging whether the rotating speed is larger than a second calibrated rotating speed value or not; if yes, controlling the automatic gearbox to exit from a neutral sliding state; wherein the second calibrated speed value is greater than the first calibrated speed value.
In some embodiments of the present invention, after the first operating state parameter satisfies a first preset condition, controlling the automatic gearbox to enter the neutral coasting state further includes: acquiring a brake shape of the vehicle or an operation mode of an automatic gearbox; and controlling the automatic gearbox to exit the neutral sliding state when the vehicle is in a braking state or the automatic gearbox of the vehicle is in a manual mode.
A second aspect of the present invention proposes an automatic transmission that operates according to the control method of the automatic transmission operation in the first aspect, the automatic transmission including: a clutch actuator; a transmission controller including a transmission control device and a computer readable storage medium, the transmission control device for reading and executing control instructions in the computer readable storage medium, the transmission control device comprising: the acquisition unit is used for acquiring the first running state parameter and the opening parameter of the accelerator pedal; the judging unit is used for judging whether the first running state parameter meets a first preset condition or not and judging whether the opening degree parameter meets a second preset condition or not; the control unit controls the clutch executing mechanism to execute a separation action according to the first running state parameter meeting the first preset condition so that the automatic gearbox enters a neutral sliding state, and controls the clutch executing mechanism to execute a connection action according to the opening degree parameter meeting the second preset condition so that the automatic gearbox exits the neutral sliding state.
According to the automatic gearbox provided by the invention, the second preset condition is set, so that when the opening parameter of the accelerator pedal meets the second preset condition, the control unit controls the clutch actuating mechanism to execute the engagement action again, so that the automatic gearbox is led to exit the neutral sliding mode, the situation that a driver only steps on the accelerator to exit the neutral sliding mode is avoided, the frequency of entering and exiting the neutral sliding mode is reduced, the time occupation ratio of the neutral sliding is increased, and the fuel consumption of the whole vehicle is reduced, and the thermal management performance is improved.
A third aspect of the present invention proposes a vehicle comprising:
An automatic transmission according to the second aspect; a vehicle speed sensor for detecting a vehicle running speed; the gradient sensor is used for detecting the gradient of a road on which the vehicle is positioned; the accelerator opening detection device is used for detecting opening parameters of an accelerator pedal of the vehicle; a rotation speed detecting device for detecting a rotation speed of an engine of the vehicle; the brake detection device is used for detecting the brake state of the vehicle; the speed sensor, the gradient sensor, the accelerator opening detection device, the rotation speed detection device and the brake detection device are all electrically connected with a gearbox controller of the automatic gearbox.
According to the vehicle provided by the third aspect of the invention, the control method for the operation of the automatic gearbox in the first aspect controls the operation of the automatic gearbox, so that the situation that the neutral sliding mode is exited only by the driver stepping on the accelerator is avoided, the frequency of entering and exiting the neutral sliding mode is reduced, the time duty ratio of the neutral sliding is increased, the fuel consumption of the whole vehicle is reduced, and the heat management performance is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
Fig. 1 schematically shows a flow chart of a control method of an automatic transmission operation according to a first embodiment of the present invention;
FIG. 2 schematically illustrates a flow chart of a method of controlling operation of an automatic transmission according to one embodiment of the present invention;
FIG. 3 schematically illustrates a flow chart of a method of controlling operation of an automatic transmission according to one embodiment of the present invention;
FIG. 4 schematically illustrates a flow chart of a method of controlling operation of an automatic transmission according to one embodiment of the present invention;
FIG. 5 schematically illustrates a schematic view of an automatic transmission according to one embodiment of the present invention;
fig. 6 schematically shows a schematic view of a vehicle according to an embodiment of the invention.
The reference numerals are as follows:
100-automatic gearbox, 110-clutch actuator, 120-gearbox controller, 121-acquisition unit, 122-determination unit, 123-control unit,
200-Vehicle, 201-vehicle speed sensor, 202-gradient sensor, 203-accelerator opening detection device, 204-rotation speed detection device and 205-brake detection device.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Accordingly, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.
As shown in fig. 1, according to an embodiment of the present invention, there is provided a control method for an automatic transmission operation, the control method including:
Step S101: acquiring a first running state parameter of a vehicle;
Step S102: judging whether the first running state parameter meets a first preset condition, if so, executing step S103, and if not, executing step S101:
Step S103: controlling the automatic gearbox to enter a neutral sliding state;
Step S104: acquiring opening parameters of an accelerator pedal;
Step S105: judging whether the opening parameter meets a second preset condition, if so, executing the step S106, and if not, executing the step S104;
step S106: and controlling the automatic gearbox to exit the neutral sliding state.
In steps S101 to S103, when the first running state parameter satisfies the first preset condition, it is indicated that the vehicle is running in the safe range, so that the automatic gearbox is controlled to enter the neutral sliding state to achieve the purpose of saving fuel. In detail, the first operating state parameters include the running speed V, the gradient a, the opening rAPP of the accelerator pedal, the rotational speed nEng of the engine of the vehicle, the braking state of the vehicle, and the transmission operating mode of the vehicle. Meeting the first preset condition includes: the driving speed is in a first preset speed range (V1, V2), the gradient of the road on which the vehicle is positioned is in a first preset gradient range (a 1, a 2), the opening degree of the accelerator pedal is smaller than a calibrated opening degree value rAPP1, the rotating speed of the engine of the vehicle is smaller than a first calibrated rotating speed value nEng1, the vehicle is in an unbraked state, and the gearbox of the vehicle is in an automatic mode.
The vehicle braking potential safety hazard exists in neutral gear sliding, so that the running speed of the vehicle is controlled within a first preset speed range (V1, V2), the running speed of the vehicle is prevented from being too high, and the vehicle is always in a braking safety range. The lowest speed V1 and the highest speed V2 in the first preset speed range obtain specific speed values according to neutral sliding tests of different types of vehicles so as to ensure the braking safety of the vehicles.
Similarly, the first predetermined gradient range (a 1, a 2) is a gradient value that is obtained based on a neutral coast test of a different type of vehicle to ensure safe braking of the vehicle.
The condition that the opening of the accelerator pedal is smaller than the calibrated opening value rAPP1 is used for judging that the opening of the actual accelerator is 0, namely, when the opening of the accelerator pedal is smaller than the calibrated opening value rAPP1, the actual opening of the accelerator is judged to be 0, and at the moment, the fact that a driver does not have an acceleration intention is indicated, and the automatic gearbox can be controlled to enter a neutral sliding state. The purpose of setting the calibration opening value rAPP1 is to keep a certain range for judging that the accelerator opening is 0 and prevent erroneous judgment caused by accelerator signal burrs. For example, in one particular embodiment, rAPP1 is set to 1%, i.e., when the throttle opening is less than 1%, then the neutral coasting condition is satisfied. In another exemplary embodiment, the opening of the accelerator pedal is smaller than the calibrated opening value rAPP1 and smaller than the continuous calibration time T, which can be set according to the specific situation.
The first calibrated speed nEng is a limit value for determining whether the engine is overspeed, and when the engine speed is greater than the first calibrated speed nEng1, the engine speed is too fast, and the vehicle braking potential safety hazard exists in the state. When the engine speed is less than the first calibrated speed value nEng, the engine speed is within the safety range, and the vehicle braking safety is higher in the state. Specifically, in one exemplary embodiment, the first calibrated speed value nEng may be set to the rated speed of the engine.
When the vehicle is in a braking state, the driver is informed of the willingness to brake and slow down, so that the driver can timely exit the neutral sliding mode, the transmission case clutch executes the combination action, the transmission system is tightly combined with the engine, the engine speed is slowed down, and a braking force is generated for the vehicle by inertia run fast, namely the engine is braked. On one hand, the brake drum can be prevented from being bitten by the instant brake pressure, so that the brake effect is reduced; on the other hand, the braking action of the left wheel and the right wheel can be balanced, so that the vehicle can be stopped steadily and slowly.
In step S104 to step S106, by acquiring the opening parameter of the accelerator pedal, when the opening parameter of the accelerator pedal meets the second preset condition, the automatic gearbox is controlled to exit the neutral sliding mode, so that the situation that the driver exits the neutral sliding mode only by stepping on the accelerator is avoided, and the frequency of entering and exiting the neutral sliding mode is reduced.
In one exemplary embodiment, the opening parameter includes a percentage opening rAPP of the accelerator pedal, and satisfying the second preset condition includes: the percentage opening of the accelerator pedal is larger than the first limit value rAPP2 and smaller than the second limit value rAPP3 and lasts for a first time period T1; or the percentage opening of the accelerator pedal is greater than a second limit rAPP3 for a second period of time T2, and rAPP2< rAPP3, T2< T1. In this embodiment, when the percentage opening rAPP of the accelerator pedal is between the first limit rAPP2 and the second limit rAPP3 (i.e., rAPP2< rAPP < rAPP 3) and lasts for a time T1, the driver is considered to have a certain power demand, and the automatic gearbox is controlled to exit the neutral sliding state in order to meet the power demand of the driver. And when the percentage opening rAPP of the accelerator pedal is larger than the second limit value rAPP3 and lasts for T2, the driver is indicated to have stronger power demand, so that the automatic gearbox is controlled to leave the neutral sliding state. It should be noted that, the purpose of setting the time periods T1 and T2 is to determine whether the driver has a situation of stepping on the small accelerator by mistake or stepping on the small accelerator by a point, so as to eliminate the interference of stepping on the accelerator by mistake or stepping on the small accelerator by a point frequently by the driver, if the percentage opening of the accelerator is between the rAPP2 and the rAPP3, but the duration is less than T1, then the automatic gearbox continues to slide in neutral, if the percentage opening of the accelerator is greater than the rAPP3, but the duration is less than T2, then the automatic gearbox continues to slide in neutral, so as to avoid the interference of stepping on the small accelerator by mistake by the driver, and thus the purpose of reducing the exit frequency of the neutral sliding is achieved. It should be further noted that when the percentage opening rAPP of the accelerator pedal is greater than the second limit rAPP3, the power demand of the driver is strong, so the duration of T2 is set to a short period of time, for example, 0.5s, so as to immediately exit the neutral coast to quickly respond to the power demand of the driver. When rAPP2< rAPP < rAPP3, it is indicated that there is a certain power demand for the driver, and to further avoid confusion with the driver's misstep behavior, the duration of T1 may be set to a longer period of time, for example, 1s, 1.5s or 2s. Wherein, the first limit value rAPP2 is larger than the calibrated opening value rAPP1.
In one exemplary embodiment, the opening parameter further includes a rate of change grd of a percentage opening of the accelerator pedal, and satisfying the second preset condition includes: the change rate grd of the percentage opening degree of the accelerator pedal is larger than the third limit value grd1 and smaller than the fourth limit value grd2 and lasts for a third time period T3; or the change rate of the percentage opening of the accelerator pedal is larger than the fourth limit value grd2 for a fourth period of time T4, and grd1< grd2, T4< T3. In this embodiment, when the change rate grd of the percentage opening of the accelerator pedal is between the third limit grd1 and the fourth limit grd2 (i.e., grd1< grd < grd 2) and lasts for a time T3, the driver is considered to have a certain power demand, and the automatic gearbox is controlled to exit the neutral sliding state in order to meet the power demand of the driver. And when the change rate grd of the percentage opening of the accelerator pedal is larger than the fourth limit grd2 and lasts for the time T4, the driver is provided with stronger power demand, so that the automatic gearbox is controlled to leave the neutral sliding state. It should be noted that, the purpose of setting up time period T3 and T4 respectively is to distinguish the driver to step on the condition of accelerator by mistake or some, eliminates the driver and steps on the interference of accelerator by mistake or often some, reduces the exit frequency of neutral gear coasting. It should be further noted that, when the percentage opening rate grd of the accelerator pedal is greater than the fourth limit grd2, the power demand of the driver is strong, so the duration of T4 is set to a short period of time, for example, 0.4s, 0.5s, or 0.6s, so as to immediately exit the neutral coast to quickly respond to the power demand of the driver. When grd1< grd2 indicates that there is a certain power demand for the driver, the duration of T3 may be set to a longer period of time, for example, 1s, 1.5s or 2s, in order to further avoid confusion with the driver's misstep behavior. The third limit value grd1 and the fourth limit value grd2 are adjusted according to specific test results of different types of vehicles because the change rate of the percentage opening of the accelerator pedal has different effects on the acceleration of the vehicles due to the differences of the power, the load and the like of different vehicles.
In one embodiment, as shown in fig. 2, after the first operation state parameter satisfies the first preset condition, the automatic transmission is controlled to enter the neutral coasting state, further comprising the following steps:
Step S201: acquiring the running speed of the vehicle;
Step S202: judging whether the running speed is in a second preset speed range, if so, executing the step S201, otherwise, executing the step S203;
Step S203: and controlling the automatic gearbox to exit the neutral sliding state.
In the present embodiment, the first preset speed range (V1, V2) is within the second preset speed range (V3, V4), that is, V3< V1< V2< V4, and when the running speed is within the second preset speed range (V3, V4), it is indicated that the vehicle is in a safe state in the neutral coasting state. When the driving speed is not in the second preset speed range (V3, V4), i.e. the driving speed is less than V3 or the driving speed is greater than V4. When the running speed is less than V3, it means that the vehicle speed is low, and the neutral coast is not provided for the action value of saving the oil amount. When the running speed is greater than V4, the running speed of the vehicle is too high, and if the vehicle is still in the neutral sliding state, the potential safety hazard of braking can exist, so that the automatic gearbox is controlled to exit the neutral sliding mode to ensure the running safety. It should be emphasized that the second preset speed range is set to ensure that the entering condition (i.e. V1< V2) and the exiting condition (V < V3 or V > V4) of the running speed V related parameter have a certain interval, so as to avoid the running speed parameter V running near the boundary (e.g. V1 or V2) to cause repeated jump of the judging state.
In one embodiment, as shown in fig. 3, after the first operation state parameter satisfies the first preset condition, the automatic transmission is controlled to enter the neutral coasting state, further comprising the following steps:
Step S301: acquiring the gradient of the vehicle;
step S302: judging whether the gradient is in a second preset gradient range, if so, executing the step S301, otherwise, executing the step S303;
step S303: and controlling the automatic gearbox to exit the neutral sliding state.
In the present embodiment, the first preset gradient range (a 1, a 2) is within the second preset speed range (a 3, a 4), that is, a3< a1< a2< a4, and when the gradient is within the second preset gradient range (a 3, a 4), it is indicated that the vehicle is in a safe state in the neutral coasting state. When the gradient is not in the second preset gradient range (a 3, a 4), i.e., the gradient is less than a3, or the gradient is greater than a4. When the degree of the sloping field is smaller than a3, the vehicle is in a downhill state with a larger gradient, and at the moment, the neutral sliding can have potential safety hazards of braking. When the gradient is greater than a4, the vehicle is in an ascending state with a larger gradient, and if the vehicle is still in a neutral sliding state, a potential braking safety hazard possibly exists, so that the automatic gearbox is controlled to exit the neutral sliding mode to ensure driving safety. It should be emphasized that the purpose of setting the second preset gradient range is to ensure that the entry condition (i.e. a1< a < a 2) and the exit condition (a < a3 or a > a 4) of the gradient a-related parameter have a certain interval, and avoid that the gradient parameter a runs near the boundary (e.g. a1 or a 2) to cause repeated jump of the judging state.
In one embodiment, as shown in fig. 4, after the first operation state parameter satisfies the first preset condition, the automatic transmission is controlled to enter the neutral coasting state, further comprising the steps of:
step S401: acquiring the rotating speed of an engine of a vehicle;
step S402: judging whether the rotating speed is larger than a second calibrated rotating speed value, if so, executing the step S402, otherwise, executing the step S401;
step S403: and controlling the automatic gearbox to exit the neutral sliding state.
In this embodiment, when the rotational speed of the engine is greater than the second calibrated rotational speed nEng, it is indicated that the rotational speed of the engine is too fast, and there is a braking hidden danger, so that the automatic gearbox is controlled to exit the neutral sliding state. The second calibration rotation speed nEng is greater than the first calibration rotation speed nEng1, so that a certain interval exists between the judging condition nEng for entering neutral sliding and the judging condition nEng for exiting neutral sliding, and repeated jump of the judging state caused by running of the rotation speed parameter nEng to the vicinity of the boundary of the first calibration rotation speed nEng1 is avoided.
In one embodiment, after the automatic transmission enters the neutral coast state, the automatic transmission is controlled to exit the neutral coast state if the driver steps on the vehicle or transitions the operating mode of the transmission to a non-automatic mode.
One specific embodiment of the invention provides a control method for the operation of an automatic gearbox, and the judging method comprises the following steps:
Step S501: acquiring a running speed, a gradient, an opening degree of an accelerator pedal, a rotating speed of an engine of a vehicle, a braking state of the vehicle and a gearbox running mode of the vehicle;
Step S502: judging whether the running speed is within a first preset speed range (V1, V2) and the gradient is within a first preset gradient range (a 1, a 2), wherein the opening degree of an accelerator pedal is smaller than a calibrated opening degree value (rAPP 1) and the rotating speed of an engine of the vehicle is smaller than a first calibrated rotating speed value (nEng 1) and the vehicle is in an unbraked state and the gearbox of the vehicle is in an automatic mode, if yes, executing a step S503, otherwise, executing a step S501;
step S503: controlling the automatic gearbox to enter a neutral sliding state;
Step S504: acquiring the percentage opening of an accelerator pedal;
step S505: judging whether the percentage opening rAPP of the pedal is larger than a second limit value rAPP3 for a second time T2, if yes, executing a step S518, otherwise executing a step S506:
Step S506: judging whether the percentage opening of the pedal is larger than a first limit value rAPP2 and lasts for a first time T1, if yes, executing a step S518, otherwise executing a step S503:
step S507: acquiring a change rate grd of the percentage opening of an accelerator pedal;
Step S508: judging whether the change rate grd is greater than the fourth limit grd2 for a fourth time T5, if yes, executing step S518, otherwise executing step S509:
step S509: judging whether the change rate grd of the percentage opening of the accelerator pedal is greater than a third limit grd1 and lasts for a third time T3, if yes, executing step S518, otherwise executing step S503:
step S510: acquiring the running speed V of the vehicle;
step S511: judging whether the running speed V is in a second preset speed range (V3, V4), if so, executing step S503, otherwise, executing step S518:
Step S512: acquiring a gradient a of a vehicle;
Step S513: judging whether the gradient a is in a second preset gradient range (a 3, a 4), if so, executing step S503, otherwise, executing step S518:
Step S514: acquiring the rotating speed nEng of an engine of the vehicle;
Step S515: judging whether the rotation speed nEng is greater than the second calibration rotation speed value nEng, if yes, executing step S518, otherwise executing step S503:
step S516: acquiring a brake shape of a vehicle or an operation mode of an automatic gearbox;
Step S517: judging whether the vehicle is in a braking state or the automatic gearbox is in a manual operation mode, if so, executing a step S518, otherwise, executing a step S503:
Step S518, control the automatic transmission to exit the neutral coasting state.
According to an embodiment of the present invention, there is provided an automatic transmission, as shown in fig. 5, an automatic transmission 100 including: a clutch actuator 110 and a transmission controller 120. Specifically, the transmission controller 120 includes a transmission control device for reading and executing control instructions in a computer-readable storage medium, and a computer-readable storage medium. The clutch actuator 110 brings the automatic transmission 100 into neutral coasting or out of neutral coasting by performing a disengaging or engaging action. The transmission control device includes an acquisition unit 121, a judgment unit 122, and a control unit 123. The acquisition unit 121 is configured to acquire a first operation state parameter and an opening degree parameter of an accelerator pedal. The judging unit 122 is configured to judge whether the first operation state parameter meets a first preset condition and judge whether the opening parameter meets a second preset condition. The control unit 123 controls the clutch actuator 110 to perform a disengaging action according to the first operation state parameter satisfying the first preset condition to bring the automatic transmission 100 into the neutral sliding state, and controls the clutch actuator 110 to perform an engaging action according to the opening degree parameter satisfying the second preset condition to bring the automatic transmission 100 out of the neutral sliding state. When the opening parameter of the accelerator pedal meets the second preset condition, the control unit 123 controls the clutch executing mechanism 110 to execute the engaging action, so that the automatic gearbox 100 can exit the neutral sliding mode, the situation that the neutral sliding mode is exited only by the driver stepping on the accelerator is avoided, the frequency of entering and exiting the neutral sliding mode is reduced, the time occupation ratio of the neutral sliding is increased, the fuel consumption of the whole vehicle is reduced, and the heat management performance is improved. In one exemplary embodiment, the determination unit 122 includes an RS flip-flop through which the maintenance or determination of the state is performed.
According to an embodiment of the present invention, there is provided a vehicle, as shown in fig. 6, a vehicle 200 including: the automatic gearbox 100, the vehicle speed sensor 201, the gradient sensor 202, the accelerator opening degree detection device 203, the rotation speed detection device 204 and the brake detection device 205 are electrically connected with a gearbox controller of the automatic gearbox 100, wherein the vehicle speed sensor 201, the gradient sensor 202, the accelerator opening degree detection device 203, the rotation speed detection device 204 and the brake detection device 205 are electrically connected with the gearbox controller. In detail, the vehicle speed sensor 201 is configured to detect a traveling speed of the vehicle 200 and transmit the traveling speed data to the acquisition unit 121 of the automatic transmission 100; the gradient sensor 202 is configured to detect a gradient at which the vehicle 200 is located and transmit the gradient data to an acquisition unit of the automatic transmission 100; the accelerator opening detecting device 203 is configured to detect an opening parameter of an accelerator pedal of the vehicle 200 and transmit the opening parameter to an acquisition unit of the automatic gearbox 100; the rotation speed detecting device 204 is configured to detect a rotation speed of an engine of the vehicle 200 and transmit the rotation speed data to an acquisition unit of the automatic transmission 100; the brake detecting device 205 is configured to detect a brake state of the vehicle 200 and transmit the brake state data to an acquisition unit of the automatic transmission 100. The vehicle 200 provided by the invention can control the operation of the automatic gearbox 100 according to the control method of the operation of the automatic gearbox 100, and through detecting a plurality of variables, the safe working conditions of the vehicle 200 and the engine are identified, meanwhile, the driving scene and the intention of a driver of the vehicle 200 are accurately identified, the reasonable entering and exiting conditions of the idle gear sliding of the AMT automatic gearbox are ensured, the situation that the idle gear sliding mode is exited only when the driver steps on an accelerator is avoided, thereby reducing the frequency of entering and exiting the idle gear sliding mode, increasing the time occupation ratio of the idle gear sliding, reducing the oil consumption of the whole vehicle and improving the heat management performance.
According to the control method for the running of the automatic gearbox, which is provided by the invention, the actual vehicle verification is carried out on a 49-ton tractor, the preset value of the small accelerator can be 30% without influencing the power requirement of a driver and the safety of the vehicle, the time occupied by neutral sliding is increased by 28.3%, the entering and exiting times of the neutral sliding are reduced, and the fuel consumption, the hot pipeline and the driving experience of the whole vehicle are all improved.
The invention has the advantages that: on the premise of not changing hardware and increasing cost, the safety working conditions of the vehicle and the engine are analyzed by utilizing the electric control signals, the driving scene of the vehicle and the intention of the driver are accurately identified, the neutral sliding proportion of the commercial vehicle is improved, and the dual performance improvement of the fuel consumption and the thermal management of the whole vehicle is realized.
In the long-distance transport sliding process, a driver can not exit the neutral sliding mode in order to maintain the whole vehicle scenes such as the speed point stepping on the accelerator or the small stepping on the accelerator opening, so that the neutral sliding strategy is further optimized, and the dual performance improvement of the whole vehicle oil consumption and the thermal management is realized.
It will be understood by those skilled in the art that the sequence of each step in the embodiment of the present application is only a preferred embodiment of the present application, and is only for convenience in describing the technical solution and the technical effect of the present application, and not limiting the sequence of each step, in other embodiments of the present application, the sequence of each step may be adjusted without collision between each other, where the adjustment belongs to the protection scope of the present application, and is not described in detail herein.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (9)
1. A control method of an automatic transmission operation, characterized by comprising:
Acquiring a first running state parameter of a vehicle;
judging whether the first running state parameter meets a first preset condition or not;
according to the first running state parameter meeting the first preset condition, controlling the automatic gearbox to enter a neutral sliding state;
acquiring opening parameters of an accelerator pedal;
judging whether the opening parameter meets a second preset condition or not;
controlling the automatic gearbox to exit a neutral sliding state according to the opening parameter meeting the second preset condition;
The opening parameters of the accelerator pedal comprise: the change rate of the percentage opening of the accelerator pedal;
the meeting the second preset condition includes:
the change rate of the percentage opening of the accelerator pedal is larger than a third limit value and smaller than a fourth limit value and lasts for a third time period; or (b)
The change rate of the percentage opening of the accelerator pedal is larger than a fourth limit value and lasts for a fourth time period;
Wherein the fourth limit is greater than the third limit and the third time period is greater than the fourth time period.
2. The method for controlling the operation of an automatic transmission according to claim 1, wherein,
The opening parameters of the accelerator pedal comprise: the percentage opening of the accelerator pedal;
the meeting the second preset condition includes:
the percentage opening of the accelerator pedal is larger than the first limit value and smaller than the second limit value and lasts for a first time period; or (b)
The percentage opening of the accelerator pedal is larger than a second limit value and lasts for a second time period;
Wherein the second limit is greater than the first limit and the first period of time is greater than the second period of time.
3. The method for controlling the operation of an automatic transmission according to claim 1, wherein,
The first operating state parameter includes:
a travel speed, a gradient, an opening of the accelerator pedal, a rotational speed of an engine of the vehicle, a braking state of the vehicle, and a transmission operating mode of the vehicle;
The first operation state parameter meeting a first preset condition includes:
the running speed is in a first preset speed range, the gradient is in a first preset gradient range, the opening of the accelerator pedal is smaller than a calibrated opening value, the rotating speed of an engine of the vehicle is smaller than a first calibrated rotating speed value, the vehicle is in an unbraked state, and a gearbox of the vehicle is in an automatic mode;
Wherein the calibrated opening value is smaller than a first limit value.
4. A control method for an automatic transmission operation according to claim 3, wherein,
According to the first running state parameter meeting a first preset condition, the automatic gearbox is controlled to enter a neutral sliding state, and then the automatic gearbox further comprises:
acquiring the running speed of the vehicle;
judging whether the running speed is in a second preset speed range or not;
if not, controlling the automatic gearbox to exit the neutral sliding state;
the first preset speed range is within the second preset speed range.
5. A control method for an automatic transmission operation according to claim 3, wherein,
And after the first running state parameter meets a first preset condition, controlling the automatic gearbox to enter a neutral sliding state, further comprising:
acquiring the gradient of the vehicle;
judging whether the gradient is in a second preset gradient range or not;
if not, controlling the automatic gearbox to exit the neutral sliding state;
the first preset gradient range is within the second preset gradient range.
6. A control method for an automatic transmission operation according to claim 3, wherein,
And after the first running state parameter meets a first preset condition, controlling the automatic gearbox to enter a neutral sliding state, further comprising:
Acquiring the rotating speed of an engine of the vehicle;
Judging whether the rotating speed is larger than a second calibrated rotating speed value or not;
if yes, controlling the automatic gearbox to exit from a neutral sliding state;
wherein the second calibrated speed value is greater than the first calibrated speed value.
7. A control method for an automatic transmission operation according to claim 3, wherein,
And after the first running state parameter meets a first preset condition, controlling the automatic gearbox to enter a neutral sliding state, further comprising:
acquiring a braking state of the vehicle or an operation mode of an automatic gearbox;
and controlling the automatic gearbox to exit the neutral sliding state when the vehicle is in a braking state or the automatic gearbox of the vehicle is in a manual mode.
8. An automatic transmission for executing the control method of the automatic transmission operation according to any one of claims 1 to 7, characterized by comprising:
A clutch actuator;
A transmission controller including a transmission control device and a computer readable storage medium, the transmission control device for reading and executing control instructions in the computer readable storage medium, the transmission control device comprising:
The acquisition unit is used for acquiring the first running state parameter and the opening parameter of the accelerator pedal;
the judging unit is used for judging whether the first running state parameter meets a first preset condition or not and judging whether the opening degree parameter meets a second preset condition or not;
The control unit controls the clutch executing mechanism to execute a separation action to enable the automatic gearbox to enter a neutral sliding state according to the first running state parameter meeting the first preset condition, and controls the clutch executing mechanism to execute a connection action to enable the automatic gearbox to exit the neutral sliding state according to the opening degree parameter meeting the second preset condition.
9. A vehicle, characterized in that the vehicle comprises:
The automatic transmission of claim 8;
a vehicle speed sensor for detecting a vehicle running speed;
the gradient sensor is used for detecting the gradient of a road on which the vehicle is positioned;
The accelerator opening detection device is used for detecting opening parameters of an accelerator pedal of the vehicle;
A rotation speed detecting device for detecting a rotation speed of an engine of the vehicle;
The brake detection device is used for detecting the brake state of the vehicle;
The speed sensor, the gradient sensor, the accelerator opening detection device, the rotation speed detection device and the brake detection device are all electrically connected with a gearbox controller of the automatic gearbox.
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| CN114857254B (en) * | 2022-05-11 | 2024-05-17 | 潍柴动力股份有限公司 | Control method for neutral coasting of vehicle, automatic gearbox and vehicle |
| CN116006678B (en) * | 2023-03-27 | 2023-08-11 | 潍柴动力股份有限公司 | AMT gearbox neutral gear coasting control method and device, vehicle and storage medium |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020022994A (en) * | 2000-09-22 | 2002-03-28 | 모리 하루오 | Control Apparatus For Automatic Transmission |
| JP2009058112A (en) * | 2007-09-04 | 2009-03-19 | Toyota Motor Corp | Controller for vehicular automatic transmission |
| EP2426377A2 (en) * | 2010-09-03 | 2012-03-07 | JATCO Ltd | Engine auto-stop vehicle and control method therefor |
| EP2457791A2 (en) * | 2010-11-25 | 2012-05-30 | JATCO Ltd | Coast stop vehicle and control method for coast stop vehicle |
| CN104822558A (en) * | 2012-11-28 | 2015-08-05 | 丰田自动车株式会社 | Travel control device |
| CN105292110A (en) * | 2015-10-12 | 2016-02-03 | 北京汽车股份有限公司 | Vehicle energy saving control method |
| CN105752083A (en) * | 2016-03-28 | 2016-07-13 | 上汽通用汽车有限公司 | Vehicle gear shifting control method and system |
| CN106143474A (en) * | 2015-03-25 | 2016-11-23 | 比亚迪股份有限公司 | Hybrid vehicle and drive control method and apparatus thereof |
| CN106195259A (en) * | 2016-07-25 | 2016-12-07 | 广州汽车集团股份有限公司 | A kind of automatic transmission neutral control method |
| CN106314435A (en) * | 2016-08-29 | 2017-01-11 | 中国第汽车股份有限公司 | Energy-saving driving control method matched with a mechanical automatic transmission vehicle |
| CN110081160A (en) * | 2019-04-17 | 2019-08-02 | 中国第一汽车股份有限公司 | A kind of automatic transmission emergency hand shift control method for slope road operating condition |
| CN112524231A (en) * | 2020-11-27 | 2021-03-19 | 浙江吉利控股集团有限公司 | Control method and control system for vehicle gearbox |
| CN113879310A (en) * | 2021-11-15 | 2022-01-04 | 潍柴动力股份有限公司 | Downshift skip control method |
| CN114179808A (en) * | 2022-01-17 | 2022-03-15 | 潍柴动力股份有限公司 | Active regeneration cooperative control method, system, vehicle and medium |
| CN114278726A (en) * | 2021-12-24 | 2022-04-05 | 联合汽车电子有限公司 | Method and device for reducing fuel consumption of vehicle in sliding process |
-
2022
- 2022-05-10 CN CN202210504152.XA patent/CN114877066B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020022994A (en) * | 2000-09-22 | 2002-03-28 | 모리 하루오 | Control Apparatus For Automatic Transmission |
| JP2009058112A (en) * | 2007-09-04 | 2009-03-19 | Toyota Motor Corp | Controller for vehicular automatic transmission |
| EP2426377A2 (en) * | 2010-09-03 | 2012-03-07 | JATCO Ltd | Engine auto-stop vehicle and control method therefor |
| EP2457791A2 (en) * | 2010-11-25 | 2012-05-30 | JATCO Ltd | Coast stop vehicle and control method for coast stop vehicle |
| CN104822558A (en) * | 2012-11-28 | 2015-08-05 | 丰田自动车株式会社 | Travel control device |
| CN106143474A (en) * | 2015-03-25 | 2016-11-23 | 比亚迪股份有限公司 | Hybrid vehicle and drive control method and apparatus thereof |
| CN105292110A (en) * | 2015-10-12 | 2016-02-03 | 北京汽车股份有限公司 | Vehicle energy saving control method |
| CN105752083A (en) * | 2016-03-28 | 2016-07-13 | 上汽通用汽车有限公司 | Vehicle gear shifting control method and system |
| CN106195259A (en) * | 2016-07-25 | 2016-12-07 | 广州汽车集团股份有限公司 | A kind of automatic transmission neutral control method |
| CN106314435A (en) * | 2016-08-29 | 2017-01-11 | 中国第汽车股份有限公司 | Energy-saving driving control method matched with a mechanical automatic transmission vehicle |
| CN110081160A (en) * | 2019-04-17 | 2019-08-02 | 中国第一汽车股份有限公司 | A kind of automatic transmission emergency hand shift control method for slope road operating condition |
| CN112524231A (en) * | 2020-11-27 | 2021-03-19 | 浙江吉利控股集团有限公司 | Control method and control system for vehicle gearbox |
| CN113879310A (en) * | 2021-11-15 | 2022-01-04 | 潍柴动力股份有限公司 | Downshift skip control method |
| CN114278726A (en) * | 2021-12-24 | 2022-04-05 | 联合汽车电子有限公司 | Method and device for reducing fuel consumption of vehicle in sliding process |
| CN114179808A (en) * | 2022-01-17 | 2022-03-15 | 潍柴动力股份有限公司 | Active regeneration cooperative control method, system, vehicle and medium |
Non-Patent Citations (4)
| Title |
|---|
| 2001款蒙迪欧行驶中空档灭车;李朝珍;汽车维修技师;20040401(第04期);全文 * |
| 基于人-车-路环境下汽车无级自动变速传动的智能控制;孙冬野, 秦大同;中国机械工程;20050415(第04期);全文 * |
| 履带车辆行驶环境与驾驶意图的模糊特征分析;易军;许忠保;邓援超;刘小鹏;;湖北工业大学学报;20080415(第02期);全文 * |
| 考虑油门开度快速变化的自动变速器换挡控制策略;刘文光;何仁;;农业机械学报;20090925(第09期);全文 * |
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