CN115059757A - Control method, computing device and medium for coaxial downshift - Google Patents
Control method, computing device and medium for coaxial downshift Download PDFInfo
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- CN115059757A CN115059757A CN202210660657.5A CN202210660657A CN115059757A CN 115059757 A CN115059757 A CN 115059757A CN 202210660657 A CN202210660657 A CN 202210660657A CN 115059757 A CN115059757 A CN 115059757A
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- 238000004590 computer program Methods 0.000 claims description 4
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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
- F16H61/0437—Smoothing ratio shift by using electrical signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
- F16H63/50—Signals to an engine or motor
- F16H63/502—Signals to an engine or motor for smoothing gear shifts
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Abstract
The embodiment of the invention discloses a control method for coaxial downshift, computer equipment and a medium, wherein the control method for coaxial downshift is applied to an automobile with double clutches and comprises the following steps: acquiring a current gear and a target gear; when the power transmission system in which the current gear is located and the power transmission system in which the target gear is located are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under the first clutch; controlling the rotating speed of the engine to be continuously increased to a target rotating speed, and simultaneously controlling the current gear to downshift to the target gear; and the target rotating speed is the rotating speed of the engine under the target gear. Under the condition of meeting the coaxial downshift, the increasing of the rotating speed of the engine and the adjustment of the gears are controlled simultaneously, the rotating speed of the engine is directly increased to the rotating speed of the target gear, the continuous output of power in the downshift process is guaranteed, the time required by downshift is shortened, the downshift efficiency is improved, and the use feeling of a user is improved.
Description
Technical Field
The invention relates to the technical field of transmissions, in particular to a control method, computing equipment and a medium for coaxial downshift.
Background
The existing double-clutch automatic transmission comprises two sets of gear transmission systems, wherein an odd clutch controls power transmission of odd gears, such as 1 gear, 3 gears, 5 gears and 7 gears; the even-numbered clutches control power transmission of even-numbered gears, such as 2 gears, 4 gears, 6 gears and R gears. And after the gears are meshed, the control program in the transmission control unit respectively controls the combination and the separation of the odd-numbered clutch and the even-numbered clutch to realize gear switching.
For a dual clutch automatic transmission, when a target gear and a current gear are in the same gear transmission system, the prior art mainly has two control methods: firstly, the clutch is cut off, the target gear is engaged again after the gear is taken off, and then the clutch is engaged again, so that the power is interrupted in the gear shifting process by the control method; by means of intermediate gear transition, two gear shifting operations are continuously carried out, and the control method can lead to overlong gear shifting time and poor dynamic performance.
Disclosure of Invention
The embodiment of the invention provides a control method, a computing device and a medium for coaxial downshift, which are used for ensuring the continuous output of power in the downshift process, shortening the time required by downshift, improving the downshift efficiency and improving the use experience of a user.
In a first aspect, an embodiment of the present invention provides a method for controlling a coaxial downshift, which is applied to an automobile with dual clutches, and includes:
acquiring a current gear and a target gear;
when the power transmission system in which the current gear is located and the power transmission system in which the target gear is located are both first power transmission systems, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under the first clutch;
controlling the rotating speed of an engine to be continuously increased to a target rotating speed, and simultaneously controlling the current gear to downshift to the target gear; wherein the target rotational speed is a rotational speed of the engine in the target gear.
In a second aspect, an embodiment of the present invention provides a computing device, including:
one or more processors;
a storage device for storing one or more programs,
when executed by the one or more processors, cause the one or more processors to implement the method of controlling a coaxial downshift according to any one of the first aspects.
In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, implements the method for controlling a coaxial downshift according to any one of the first aspect.
The coaxial downshift control method provided by the embodiment of the invention comprises the steps of firstly obtaining a current gear and a target gear; secondly, when the power transmission system in which the current gear is located and the power transmission system in which the target gear is located are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under the first clutch; finally, controlling the rotating speed of the engine to continuously increase to a target rotating speed, and simultaneously controlling the current gear to downshift to the target gear; and the target rotating speed is the rotating speed of the engine under the target gear. According to the embodiment of the invention, under the condition of meeting the coaxial downshift, the increase of the rotating speed of the engine and the adjustment of the gears are simultaneously controlled, and the rotating speed of the engine is directly increased to the rotating speed of the target gear, so that the continuous output of power in the downshift process is ensured, the time required by the downshift is shortened, the downshift efficiency is improved, and the use experience of a user is improved.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, a brief description is given below of the drawings used in describing the embodiments. It should be clear that the described figures are only views of some of the embodiments of the invention to be described, not all, and that for a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 is a schematic flowchart of a method for controlling a coaxial downshift according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a control method for a coaxial downshift according to a second embodiment of the present invention;
FIG. 3 is a graph illustrating the variation of the engine speed according to a second embodiment of the present invention;
fig. 4 is a schematic flowchart of a control method for a coaxial downshift according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a control device for a coaxial downshift according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a computer arrangement according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below by way of specific embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, not all embodiments, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts fall within the scope of the present invention.
Example one
Fig. 1 is a schematic flow chart of a method for controlling a coaxial downshift according to an embodiment of the present invention, and referring to fig. 1, the embodiment is applicable to downshift adjustment of an automobile with a dual clutch, and the method may be implemented by a control device for coaxial downshift according to an embodiment of the present invention, where the device may be implemented by software and/or hardware, and the method specifically includes the following steps:
and S110, acquiring a current gear and a target gear.
Different gears can obtain different transmission ratios by matching a series of large gears and small gears, and the engine can work in the optimal power performance state by adjusting the gear of the automobile. The gears include, for example, 1 st gear, 2 nd gear, 3 rd gear, 4 th gear, and the like, and the embodiment of the present invention is not particularly limited thereto. Further, the current gear is a current gear state of the vehicle, the target gear is a gear state to be achieved by the vehicle, and illustratively, the current gear is 4 gears and the target gear is 2 gears.
And S120, when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode.
The double clutches of the automobile refer to odd clutches with one part transmitting odd gears and even clutches with the other part transmitting even gears, and the power transmission system of the automobile is transmitted through two different clutches, namely the power transmission system with the odd gears is different from the power transmission system with the even gears.
Optionally, the first clutch is an odd clutch, and the second clutch is an even clutch; alternatively, the first clutch is an even clutch and the second clutch is an odd clutch.
Specifically, if the odd clutch may be the first clutch, the even clutch may be the second clutch on this basis. If the odd clutch is the second clutch and the even clutch is the first clutch on the basis, the odd clutch and the even clutch are not specifically named and are distinguished only by the difference in naming according to the embodiment of the present invention.
Specifically, the power transmission system may include a first power transmission system and a second power transmission system, the first power transmission system is a power transmission system under the first clutch, and the second power transmission system is a power transmission system under the second clutch, that is, the power transmission systems are different under different clutches. When the current gear is in the first power transmission system and the target gear is also in the first power transmission system, it indicates that the current gear and the target gear are different gears controlled by the same clutch, and for example, when the first clutch is an even-numbered clutch, the current gear is 4 and is in the first power transmission system, and the target gear is 2 and is also in the first power transmission system, and then the power coaxial downshift mode can be started.
And S130, controlling the rotation speed of the engine to be continuously increased to the target rotation speed.
Specifically, the rotating speed of the engine is a physical parameter, and the rotating speed of the engine is related to the number of times of doing work in unit time or the effective power of the engine, that is, the effective power of the engine changes with different rotating speeds.
Further, the kinetic energy provided by the engine is transmitted to different gears corresponding to different gears through the clutch, namely, the engine has different rotating speeds matched with the different gears. The target rotation speed is the rotation speed of the engine in the target gear, and for example, the target gear is gear 2, and the target rotation speed is the rotation speed of the engine in gear 2.
And S140, controlling the current gear to downshift to the target gear.
Specifically, while the rotating speed of the transmitter is continuously increased from the current rotating speed to the target rotating speed, the gears are controlled to be synchronously adjusted, namely, the current gear is downshifted to the target gear. For example, when the current gear is 4 th gear and the target gear is 2 nd gear, the gear will be 2 nd gear from 4 th gear while the engine speed continues to increase to the 2 nd lower speed.
The coaxial downshift control method provided by the embodiment of the invention comprises the steps of firstly obtaining a current gear and a target gear; secondly, when the power transmission system in which the current gear is located and the power transmission system in which the target gear is located are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under the first clutch; finally, controlling the rotating speed of the engine to continuously increase to a target rotating speed, and simultaneously controlling the current gear to downshift to the target gear; and the target rotating speed is the rotating speed of the engine under the target gear. According to the embodiment of the invention, under the condition of meeting the coaxial downshift, the increase of the rotating speed of the engine and the adjustment of the gears are simultaneously controlled, and the rotating speed of the engine is directly increased to the rotating speed of the target gear, so that the continuous output of power in the downshift process is ensured, the time required by the downshift is shortened, the downshift efficiency is improved, and the use experience of a user is improved.
Example two
Fig. 2 is a schematic flow chart of a control method of a coaxial downshift according to a second embodiment of the present invention, fig. 3 is a graph of a history of a change in engine speed according to the second embodiment of the present invention, and reference is made to fig. 2 and fig. 3, which illustrate details of the second embodiment based on the above-described embodiments, and how to initiate the power coaxial downshift mode is detailed. In this embodiment, the method specifically includes the following steps:
and S210, acquiring a current gear and a target gear.
And S220, when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode.
And S230, acquiring the target rotating speed according to the target rotating speed calculation formula.
Wherein, the target rotating speed calculation formula is as follows: the target rotation speed is the rotation speed of the output shaft, the target gear speed ratio and the friction speed difference. The engine transmits kinetic energy to the clutch through the input shaft, the clutch is connected with the gear through the output shaft, the kinetic energy provided by the engine is transmitted to the gear, the motion of an automobile is guaranteed, namely, the output shaft is a driving shaft connected with the clutch and the gear, and the rotating speed of the output shaft can be acquired through the set rotating speed sensor. Further, the gear speed ratio refers to a transmission ratio of a gear connected to the clutch, which is equal to a ratio of a rotational angular velocity of the output shaft to a rotational angular velocity of the input shaft at a certain gear, that is, a target gear speed ratio is a ratio of the rotational angular velocity at a target gear. Further, the friction speed difference is obtained by calibration, that is, the control unit of the vehicle performs adaptive adjustment in different gears, and for example, the friction speed difference is generally between 10rpm and 50rpm, which is not specifically limited in the embodiment of the present invention.
And S240, acquiring the real-time target rotating speed of the engine according to the real-time target rotating speed calculation formula.
The real-time target rotating speed calculation formula is as follows: the real-time target speed is the engine shift starting speed + (target speed-engine shift starting speed) shift coefficient. The engine gear shifting starting rotating speed is the rotating speed of the engine during gear adjustment.
Further, referring to fig. 3, the shift coefficient is obtained by looking up a transition curve according to the ratio of the shift timing to the total shift time, wherein the transition curve is data pre-stored in the control unit of the vehicle. Specifically, the shift timing is that the shift starting time is 0, and 1 is accumulated in each calculation period in the shift process; the total gear shifting time is the expected gear shifting time and is obtained by calibration and generally ranges from 1 s to 2 s; furthermore, the transition curve is a history curve of the change of the engine speed, and is obtained by calibration, and the transition curve is generally gradually and smoothly transited from 0 to 1.
And S250, controlling the real-time target rotating speed of the engine to be continuously increased to the target rotating speed.
Specifically, the real-time target rotating speed of the engine is the real-time rotating speed when the engine performs rotating speed adjustment, and the real-time rotating speed of the engine continuously approaches the target rotating speed after the target rotating speed of the engine is obtained by the control method provided by the embodiment of the invention, namely the real-time target rotating speed is continuously increased until the target rotating speed is reached.
And S260, controlling the downshift of the current gear to the intermediate transition gear.
Specifically, the intermediate gear is located between the current gear and the target gear, for example, the intermediate transition gear is the target gear plus one gear, and for example, the current gear is 4 gears, the target gear is 2 gears, and then the intermediate transition gear is 3 gears. Further, the current gear and the target gear are both located in the first power transmission system, that is, the current gear and the target gear are different gears controlled by the same clutch, but the intermediate transition gear is located in the second power transmission system, that is, the intermediate transition gear is different from the power transmission system in which the current gear and the target gear are located. By providing an intermediate transition gear between the target gear and the current gear, a transient transition in engine power can be ensured, which in turn ensures a reduction in the time required for the reduction.
And S270, controlling the intermediate transition gear to downshift to the target gear.
Specifically, while the rotating speed of the transmitter is continuously increased from the current rotating speed to the target rotating speed, the gears are controlled to be synchronously adjusted, namely, the intermediate transition gear is downshifted to the target gear. For example, when the current gear is 4 th gear, the intermediate transition gear is 3 rd gear, and the target gear is 2 nd gear, the gear will be 2 nd gear from 3 rd gear while the engine speed is continuously increased to the speed in 2 nd gear.
In conclusion, the continuous increase of the rotating speed of the engine is realized by calculating the target rotating speed and the real-time target rotating speed of the engine, meanwhile, the intermediate transition gear is arranged, the transient transition of the power of the engine is ensured, the power output is kept in the downshift process, the time required by downshift is shortened, the downshift efficiency is improved, and the use experience of a user is improved.
EXAMPLE III
Fig. 4 is a schematic flow chart of a control method of a coaxial downshift according to a third embodiment of the present invention, and referring to fig. 4, the third embodiment of the present invention is detailed based on the above-mentioned embodiments, and how to specifically detail how to initiate the power coaxial downshift mode. In this embodiment, the method specifically includes the following steps:
and S310, acquiring a current gear and a target gear.
And S320, when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode.
And S330, acquiring the target rotating speed according to the target rotating speed calculation formula.
And S340, acquiring the real-time target rotating speed of the engine according to a real-time target rotating speed calculation formula.
And S350, controlling the real-time target rotating speed of the engine to be continuously increased to the target rotating speed.
And S360, controlling the real-time gear to be adjusted to the intermediate transition gear.
The real-time gears are gears in different stages when the current gear is adjusted to the target gear. And controlling the current gear to be shifted, namely, separating from the current gear, and then controlling the intermediate transition gear to be shifted to realize the adjustment of the shift. For example, the intermediate transition gear is 3 th gear, and when the current gear is 4 th gear, 4 th gear is disengaged and the shift to 3 rd gear is performed. By providing an intermediate transition gear between the target gear and the current gear, a transient transition in engine power can be ensured, which in turn ensures a reduction in the time required for the reduction.
And S370, controlling the oil charge of the second clutch corresponding to the intermediate transition gear.
The kinetic energy of the engine is transmitted to the gear through the combination of the clutch, the pressure oil enters one side of the clutch oil cylinder through the oil duct, the piston is pushed to move towards the other side to press the friction plate, and the driving side/the driven side of the clutch realize synchronous motion, namely the process is the oil filling process of the clutch. The embodiment of the invention does not specifically limit the material and the type of the oil charge. And controlling oil charge of the second clutch under the intermediate transition gear, namely realizing operation of a second power transmission system under the second clutch, illustratively, the intermediate transition gear is 3 gears, and when the second clutch is an odd-numbered clutch, after oil charge of the odd-numbered clutch is finished, the engine can be adjusted by 3 gears through the clutch, namely, conversion of the intermediate transition gear is finished.
And S380, judging whether the second clutch is filled with oil or not.
Furthermore, in order to ensure that the downshift process is accurately and stably carried out, the oil filling process of the second clutch is judged in the oil filling stage of the second clutch, and the successful adjustment of the intermediate transition gear is ensured. Specifically, by the judgment, if the second clutch is not filled with oil, S370 is executed, and oil filling is continued to be performed on the second clutch until oil filling of the second clutch is completed; and if the oil filling of the second clutch is finished, the gear is successfully adjusted to the intermediate transition gear, S390 is executed, and whether the real-time target rotating speed exceeds the intermediate transition rotating speed is judged.
And S390, judging whether the real-time target rotating speed exceeds the intermediate transition rotating speed.
Further, when the rotating speed of the transmitter is continuously increased from the current rotating speed to the target rotating speed, the gears are controlled to be synchronously adjusted, namely, the continuous output of power in the downshifting process is ensured, the time required by downshifting is shortened, and the downshifting efficiency is improved. In order to ensure that the increase of the rotating speed of the engine is matched with the gear adjustment, a judgment process is added in the process of increasing the rotating speed of the engine to judge whether the real-time target rotating speed exceeds the intermediate transition rotating speed. The intermediate transition gear is a gear controlled under the second clutch, that is, the intermediate transition rotation speed is the rotation speed of the second clutch under the intermediate transition gear. Further, when the gear is successfully adjusted to the intermediate transition gear, judging whether the raised rotating speed of the engine is matched with the intermediate transition gear, namely if the real-time target rotating speed exceeds the intermediate transition rotating speed, executing S3100 and controlling the current power transmission system to be adjusted to a second power transmission system; and if the real-time target rotating speed does not exceed the intermediate transition rotating speed, executing S3110 and controlling the real-time target rotating speed to continuously increase the rotating speed until the real-time target rotating speed exceeds the intermediate transition rotating speed.
And S3100, controlling the current power transmission system to be adjusted to be a second power transmission system.
When the real-time target rotating speed exceeds the intermediate transition rotating speed, namely the gear is successfully adjusted to the intermediate transition gear, the rotating speed of the engine is increased to the matched real-time target rotating speed. And further controlling the current power transmission system to adjust, namely when the current gear is positioned in the first power transmission system and the gear is adjusted to the intermediate transition gear, adjusting the power transmission system from the first power transmission system to the second power transmission system, wherein the corresponding clutches of the second power transmission system and the first power transmission system are different.
And S3120, controlling the real-time gear to be adjusted to the target gear.
The real-time gears are gears in different stages when the current gear is adjusted to the target gear, the real-time gears are intermediate transition gears at the moment, the intermediate transition gears are controlled to be shifted, namely, the intermediate transition gears are separated, and then the target gears are controlled to be shifted, so that the shifting is adjusted. For example, when the intermediate transition gear is 3 th gear and the target gear is 2 nd gear, 3 rd gear is disengaged and a shift to 2 nd gear is performed. By providing an intermediate transition gear between the target gear and the current gear, a transient transition in engine power can be ensured, which in turn ensures a reduction in the time required for the reduction.
S3130, filling oil to the first clutch corresponding to the control target gear.
The kinetic energy of the engine is transmitted to the gear through the combination of the clutch, the pressure oil enters one side of the clutch oil cylinder through the oil duct, the piston is pushed to move towards the other side to press the friction plate, and the driving side/the driven side of the clutch realize synchronous motion, namely the process is the oil filling process of the clutch. The embodiment of the invention does not specifically limit the material and the type of the oil charge. The oil charge of the first clutch under the target gear is controlled, namely, the operation of the first power transmission system under the first clutch is realized, for example, the target gear is 2 gears, and when the first clutch is an even number clutch, after the oil charge of the even number clutch is finished, the adjustment of the engine for 2 gears through the clutch can be completed, namely, the conversion of the target gear is completed.
S3140, judging whether the first clutch is filled with oil or not.
Furthermore, in order to ensure the accurate and stable downshift process, the oil filling process of the first clutch is judged in the oil filling stage of the first clutch, and the successful adjustment to the target gear is ensured. Specifically, by the judgment, if the first clutch is not filled with oil, S3130 is executed, and oil is continuously filled into the first clutch until the oil filling of the first clutch is completed; and if the first clutch is filled with oil, indicating that the gear is successfully adjusted to the target gear, executing S3150, and judging whether the real-time target rotating speed exceeds the final rotating speed.
S3150, judging whether the real-time target rotating speed exceeds the final rotating speed.
Further, when the rotating speed of the transmitter is continuously increased from the current rotating speed to the target rotating speed, the gears are controlled to be synchronously adjusted, namely, the continuous output of power in the downshifting process is ensured, the time required by downshifting is shortened, and the downshifting efficiency is improved. In order to ensure that the increase of the rotating speed of the engine is matched with the gear adjustment, a judgment process is added in the process of increasing the rotating speed of the engine to judge whether the real-time target rotating speed exceeds the final rotating speed. The target gear is a gear controlled under the first clutch, that is, the final rotation speed is the rotation speed of the first clutch under the target gear.
Further, when the gear is successfully adjusted to the target gear, whether the rotating speed increased by the engine is matched with the target gear is judged, namely if the real-time target rotating speed exceeds the final rotating speed, S3160 is executed, the current power transmission system is controlled to be adjusted to be the first power transmission system, and the downshift of the current gear to the target gear is completed; and if the real-time target rotating speed does not exceed the final rotating speed, executing S3170 and controlling the real-time target rotating speed to continuously increase the rotating speed until the real-time target rotating speed exceeds the final rotating speed.
S3160, controlling the current power transmission system to be adjusted to be the first power transmission system, and finishing the downshift from the current gear to the target gear.
When the real-time target rotating speed exceeds the final rotating speed, namely the gear is successfully adjusted to the target gear, the rotating speed of the engine is increased to the matched real-time target rotating speed, namely the target rotating speed. And further controlling the current power transmission system to adjust, namely when the intermediate transition gear is positioned in the second power transmission system and the gear is adjusted to the target gear, adjusting the power transmission system from the second power transmission system back to the first power transmission system, namely completing the downshift of the current gear to the target gear.
In conclusion, a plurality of judgment processes are additionally arranged in the processes of increasing the rotating speed of the engine and adjusting the gears, so that the accuracy and the stability of the downshift process are ensured, the transient transition of the power of the engine is further ensured, the power output is kept in the overall downshift process, the time required by downshift is shortened, the downshift efficiency is improved, and the use experience of a user is improved
Example four
Fig. 5 is a schematic structural diagram of a coaxial downshift control device according to a fourth embodiment of the present invention, which may be applied to an automobile with dual clutches, wherein the device may be implemented by software and/or hardware.
Referring to fig. 5, the control device 10 for on-axis downshift includes a gear acquisition module 100, an on-axis downshift initiation module 200 and a control module 300.
The acquiring module 100 is configured to acquire a current gear and a target gear.
A coaxial downshift starting module 200, configured to start a power coaxial downshift mode when both the power transmission system in which the current gear is located and the power transmission system in which the target gear is located are the first power transmission systems; the first power transmission system is a power transmission system under the first clutch.
The control module 300 is used for controlling the rotating speed of the engine to be continuously increased to a target rotating speed and controlling the current gear to downshift to the target gear; and the target rotating speed is the rotating speed of the engine under the target gear.
The coaxial downshift control device provided by the embodiment of the invention is firstly used for acquiring a current gear and a target gear through an acquisition module; the coaxial downshift starting module is used for starting a power coaxial downshift mode when the power transmission system in which the current gear is located and the power transmission system in which the target gear is located are both the first power transmission system; and finally, the control module is used for controlling the rotating speed of the engine to be continuously increased to the target rotating speed and controlling the current gear to downshift to the target gear. Under the condition of meeting the coaxial downshift, the increase of the rotating speed of the engine and the adjustment of the gears are simultaneously controlled, the rotating speed of the engine is directly increased to the rotating speed of the target gear, the continuous output of power in the downshift process is ensured, the time required by downshift is shortened, the downshift efficiency is improved, and the use feeling of a user is improved.
EXAMPLE five
Fig. 6 is a schematic structural diagram of a computer arrangement provided in the fifth embodiment of the present invention, and as shown in fig. 6, a computing device provided in the fifth embodiment of the present invention includes: one or more processors 41 and storage 42; the processor 41 in the device may be one or more, and one processor 41 is taken as an example in fig. 6; storage 42 is used to store one or more programs; the one or more programs are executed by the one or more processors 41 to cause the one or more processors 41 to implement a method of controlling a coaxial downshift according to any one of the embodiments of the present invention.
The processor 41, the storage means 42, the input means 43 and the output means 44 in the device may be connected by a bus or other means, as exemplified by the bus connection in fig. 6.
The storage device 42 in the apparatus is used as a computer-readable storage medium for storing one or more programs, which may be software programs, computer-executable programs, and modules, and the program instructions/modules correspond to a control method for a coaxial downshift according to an embodiment of the present invention (for example, the modules in the apparatus shown in fig. 5 include a gear acquiring module 100, a coaxial downshift starting module 200, and a control module 300). The processor 41 executes various functional applications and data processing of the terminal device by executing software programs, instructions and modules stored in the storage device 42, that is, implements the control method of the coaxial downshift in the above-described method embodiment.
The storage device 42 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the device, and the like. Further, the storage 42 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, storage 42 may further include memory located remotely from processor 41, which may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 43 may be used to receive input numeric or character information and to generate key signal inputs relating to user settings and function controls of the apparatus. The output device 44 may include a display device such as a display screen.
And, when the one or more programs included in the above-described apparatus are executed by the one or more processors 41, the programs perform the following operations: acquiring a current gear and a target gear; when the power transmission system with the current gear and the power transmission system with the target gear are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under the first clutch; controlling the rotating speed of the engine to be continuously increased to a target rotating speed, and simultaneously controlling the current gear to downshift to the target gear; and the target rotating speed is the rotating speed of the engine under the target gear.
EXAMPLE six
An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, the program being executed by a processor to perform a method for controlling a coaxial downshift, the method including: acquiring a current gear and a target gear; when the power transmission system in which the current gear is located and the power transmission system in which the target gear is located are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under the first clutch; controlling the rotating speed of the engine to be continuously increased to a target rotating speed, and simultaneously controlling the current gear to downshift to the target gear; and the target rotating speed is the rotating speed of the engine under the target gear.
Optionally, the program may be further configured to perform a method for controlling a coaxial downshift according to any of the embodiments of the present invention when executed by the processor.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a flash Memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. A computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take a variety of forms, including, but not limited to: an electromagnetic signal, an optical signal, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, Radio Frequency (RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, or the like, as well as conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A control method of coaxial downshift is applied to an automobile with double clutches, and is characterized by comprising the following steps:
acquiring a current gear and a target gear;
when the power transmission system in which the current gear is located and the power transmission system in which the target gear is located are both the first power transmission system, starting a power coaxial downshift mode; the first power transmission system is a power transmission system under the first clutch;
controlling the rotating speed of an engine to be continuously increased to a target rotating speed, and simultaneously controlling the current gear to downshift to the target gear; wherein the target rotational speed is a rotational speed of the engine in the target gear.
2. The control method according to claim 1, wherein controlling the engine speed to continue to be raised to the target speed includes:
obtaining the target rotating speed according to a target rotating speed calculation formula; the target rotating speed is equal to the rotating speed of the output shaft, the target gear speed ratio and the friction speed difference; the rotating speed of the output shaft is acquired through a rotating speed sensor;
acquiring a real-time target rotating speed of the engine according to a real-time target rotating speed calculation formula; wherein the real-time target rotation speed is the engine shift starting rotation speed + (target rotation speed-engine shift starting rotation speed) shift coefficient;
and controlling the real-time target rotating speed of the engine to be continuously increased to the target rotating speed.
3. The control method according to claim 2, wherein controlling the downshift to the target gear includes:
controlling the current gear to downshift to an intermediate transition gear; the intermediate gear is located between the current gear and the target gear;
and controlling the intermediate transition gear to downshift to the target gear.
4. The control method according to claim 3, wherein controlling the downshift of the current gear to the intermediate transition gear includes:
controlling the real-time gear to be adjusted to the intermediate transition gear;
controlling the second clutch corresponding to the intermediate transition gear to charge oil;
judging whether the real-time target rotating speed exceeds an intermediate transition rotating speed; wherein the intermediate transition speed is a speed of the second clutch in the intermediate transition gear;
if so, controlling the current power transmission system to be adjusted to a second power transmission system, wherein the second power transmission system is a power transmission system under the second clutch;
if not, controlling the real-time target rotating speed to continuously increase the rotating speed.
5. The control method according to claim 3, wherein controlling the downshift to the target gear in the intermediate transition gear includes:
controlling the real-time gear to be adjusted to the target gear;
controlling the first clutch corresponding to the target gear to charge oil;
judging whether the real-time target rotating speed exceeds the final rotating speed or not; wherein the final rotational speed is a rotational speed of the first clutch in the target gear;
if so, controlling the current power transmission system to be adjusted to be the first power transmission system, and finishing downshifting the current gear to the target gear;
if not, controlling the real-time target rotating speed to continuously increase the rotating speed.
6. The control method according to claim 4, wherein after controlling the second clutch fill corresponding to the intermediate transition gear, further comprising:
judging whether the second clutch is filled with oil or not;
if yes, judging whether the real-time target rotating speed exceeds the intermediate transition rotating speed;
if not, the second clutch continues to charge oil.
7. The control system of claim 5, wherein after controlling the first clutch fill corresponding to the target gear, further comprising:
judging whether the first clutch is filled with oil or not;
if so, judging whether the real-time target rotating speed exceeds the final rotating speed;
if not, the first clutch continues to charge oil.
8. The control system of claim 7,
the first clutch is an odd clutch, and the second clutch is an even clutch;
or, the first clutch is an even clutch, and the second clutch is an odd clutch.
9. A computing device, wherein the computing device comprises:
one or more processors;
a storage device to store one or more programs,
when executed by the one or more processors, cause the one or more processors to implement a method of controlling a coaxial downshift according to any one of claims 1-7.
10. A computer-readable storage medium on which a computer program is stored, which program, when executed by a processor, implements the method of controlling a coaxial downshift according to any one of claims 1 to 7.
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