CN113734137A - Upshift control method, device, equipment and storage medium - Google Patents
Upshift control method, device, equipment and storage medium Download PDFInfo
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- CN113734137A CN113734137A CN202111035513.2A CN202111035513A CN113734137A CN 113734137 A CN113734137 A CN 113734137A CN 202111035513 A CN202111035513 A CN 202111035513A CN 113734137 A CN113734137 A CN 113734137A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/19—Improvement of gear change, e.g. by synchronisation or smoothing gear shift
Abstract
The invention relates to the technical field of automobiles, and discloses a gear-up control method, a gear-up control device, gear-up control equipment and a storage medium. According to the method, the current running condition of the whole vehicle is obtained, the target gear is determined according to the current running condition of the whole vehicle, the gear-up operation is executed according to the target gear, the torque compensation is carried out when the torque exchange is started so as to increase the wheel end torque, the torque compensation is stopped when the torque exchange is finished, the rotating speed of the engine is adjusted, and whether the gear-up of the vehicle is successful or not is judged according to the adjusted rotating speed of the engine and the rotating speed of the target gear corresponding to the target gear. The invention carries out torque compensation when the torque exchange is started so as to increase the wheel end torque, stops the torque compensation when the torque exchange is finished, can effectively compensate the wheel end torque, and judges whether the vehicle successfully upshifts according to the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear, thereby effectively compensating the gear-shifting frustration in the upshifting process caused by different gear speed ratio differences and energy loss.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an upshift control method, device, equipment and storage medium.
Background
At present, the upshift process of the dual clutch transmission is a process in which a dual clutch transmission control module (TCU) recognizes the intention of a driver and controls a transmission actuator to realize a low gear shift to a high gear according to input signals such as the speed of a whole vehicle and an accelerator pedal. The conventional dual clutch transmission has the following problems during the upshift: 1. the torque transmitted to the wheel end of the whole vehicle is reduced due to the fact that the speed ratio is reduced in the gear-up process, and the whole vehicle has obvious pause and frustration in the gear-up process; 2. the gear shifting process of the double-clutch transmission is not refined, so that the problem of gear shifting pause and frustration of the whole vehicle caused by the fact that the speed ratio is reduced after the gear is shifted can not be fundamentally solved; 3. mutual information of the transmission control module and the engine control module in the gear shifting process is incomplete, so that the gear shifting process cannot be accurately controlled, and the whole vehicle is stopped; 4. the torque compensation mode of the transmission control module in the gear-up process is single, and the torque loss in the gear-saving process cannot be optimized according to requirements. Therefore, in a general dual clutch transmission, due to a speed ratio difference between different gears during an upshift process, in a torque exchange stage of the upshift process, torque transmitted to a wheel end of a vehicle is obviously reduced due to a smaller speed ratio after the upshift, and further, a smaller longitudinal acceleration of the whole vehicle is caused, and a frustration feeling is accompanied.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a storage medium for controlling gear-up, and aims to solve the technical problem that in the prior art, the whole vehicle is easy to be suspended in the gear-up process.
To achieve the above object, the present invention provides an upshift control method including:
acquiring a current whole vehicle running condition, and determining a target gear according to the current whole vehicle running condition;
performing an upshift operation according to the target gear, and performing torque compensation at the start of torque exchange to increase wheel-end torque;
stopping torque compensation when the torque exchange is finished, and adjusting the rotating speed of the engine;
and judging whether the vehicle successfully upshifts according to the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear.
Optionally, the step of obtaining a current vehicle running condition and determining a target gear according to the current vehicle running condition specifically includes:
determining the current running condition of the whole vehicle according to the vehicle speed signal and the accelerator pedal signal on the CAN bus;
and determining a target gear according to the current running condition of the whole vehicle, the current gear, the state of a brake pedal and the gradient signal.
Optionally, the step of performing an upshift operation according to the target gear and performing torque compensation at the beginning of the torque exchange to increase the wheel-end torque specifically includes:
controlling the vehicle to pre-shift according to the target gear;
when the vehicle pre-shifting is finished, controlling the vehicle to pre-charge oil;
and when the vehicle pre-charging is finished, controlling the vehicle to perform torque exchange, and performing torque compensation at the beginning of the torque exchange so as to increase the wheel end torque.
Optionally, the step of controlling the vehicle to perform torque exchange when the vehicle prefill is completed, and performing torque compensation when the torque exchange is started to increase the wheel-end torque specifically includes:
when the vehicle pre-charging is finished, controlling the vehicle to carry out torque exchange;
when torque exchange starts, judging whether an effective torque increasing request zone bit is received or not;
and when the effective torque increasing request zone bit is received, performing torque compensation to increase the wheel end torque.
Optionally, the step of performing torque compensation to increase the wheel-end torque when the effective torque increase request flag is received specifically includes:
when the effective torque-increasing request zone bit is received, acquiring a torque-increasing request value;
and carrying out torque compensation on the vehicle according to the torque increasing request value so as to increase the wheel end torque.
Optionally, the step of stopping torque compensation at the end of the torque exchange and adjusting the engine speed specifically includes:
when the torque exchange is finished, judging whether an invalid torque increasing request zone bit is received or not;
stopping torque compensation when the invalid torque increasing request zone bit is received, and adjusting the rotating speed of the engine to enable the adjusted rotating speed of the engine to be the same as the rotating speed of the target gear corresponding to the target gear.
Optionally, the step of determining whether the vehicle successfully upshifts according to the adjusted engine speed and the target gear speed corresponding to the target gear specifically includes:
and when the difference value between the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear is smaller than a preset threshold value, judging that the vehicle is successfully shifted up.
In order to achieve the above object, the present invention also provides an upshift control device including:
the working condition identification module is used for acquiring the current whole vehicle running working condition and determining a target gear according to the current whole vehicle running working condition;
the torque compensation module is used for executing an upshift operation according to the target gear and performing torque compensation at the beginning of torque exchange so as to increase wheel-end torque;
the rotating speed adjusting module is used for stopping torque compensation when torque exchange is finished and adjusting the rotating speed of the engine;
and the gear-up judging module is used for judging whether the vehicle is successfully shifted up according to the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear.
Further, to achieve the above object, the present invention also proposes an upshift control device including: a memory, a processor and an upshift control program stored on said memory and executable on said processor, said upshift control program being configured to implement an upshift control method as described above.
Furthermore, to achieve the above object, the present invention also proposes a storage medium having stored thereon an upshift control program which, when executed by a processor, implements the upshift control method as described above.
According to the method, the current running condition of the whole vehicle is obtained, the target gear is determined according to the current running condition of the whole vehicle, the gear-up operation is executed according to the target gear, the torque compensation is carried out when the torque exchange is started so as to increase the wheel end torque, the torque compensation is stopped when the torque exchange is finished, the rotating speed of the engine is adjusted, and whether the gear-up of the vehicle is successful or not is judged according to the adjusted rotating speed of the engine and the rotating speed of the target gear corresponding to the target gear. According to the invention, the torque compensation is carried out when the torque exchange is started so as to increase the wheel end torque, the torque compensation is stopped when the torque exchange is finished, the wheel end torque can be effectively compensated, and then whether the vehicle successfully upshifts is judged according to the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear, so that the gear shifting frustration in the upshifting process caused by different gear speed ratio differences and energy loss can be effectively compensated, the upshifting smoothness of the double-clutch transmission is effectively improved, and the driving quality of the whole vehicle is further improved.
Drawings
Fig. 1 is a schematic structural diagram of an upshift control device of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a first exemplary embodiment of an upshift control method according to the present invention;
FIG. 3 is a logic diagram of an upshift control method according to the present invention;
FIG. 4 is a flowchart illustrating a second embodiment of an upshift control method according to the present invention;
FIG. 5 is a schematic diagram of the upshift control method for 1 gear and 2 gear
FIG. 6 is a torque compensation schematic for upshift 2 and 1 according to the upshift control method of the present invention
FIG. 7 is a flowchart illustrating a third exemplary embodiment of an upshift control method according to the present invention;
FIG. 8 is a graph of acceleration without torque compensation for the upshift control method of the present invention;
FIG. 9 is a graph of acceleration curves for torque compensation by the upshift control method of the present invention;
fig. 10 is a block diagram showing the configuration of the upshift control device according to the first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an upshift control device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the upshift control device may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the upshift control device, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and an upshift control program.
In the upshift control device shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the upshift control device of the present invention may be provided in the upshift control device, which calls the upshift control program stored in the memory 1005 through the processor 1001 and executes the upshift control method provided by the embodiment of the present invention.
An embodiment of the present invention provides a method for controlling upshift, referring to fig. 2, and fig. 2 is a schematic flowchart of a first embodiment of the method for controlling upshift according to the present invention.
In this embodiment, the upshift control method includes the steps of:
step S10: acquiring a current whole vehicle running condition, and determining a target gear according to the current whole vehicle running condition;
it should be noted that the execution main body of this embodiment may be an upshift control device having network communication and program running functions, or may be another device capable of implementing the same or similar functions, and this embodiment is not particularly limited thereto.
It can be understood that the current vehicle running condition refers to a condition of the vehicle in the running process, and mainly comprises the following components according to the motion form of the vehicle: starting, accelerating, constant speed, decelerating, turning, ascending and descending, parking and other running conditions; the method mainly comprises the following steps of: the working conditions of gear shifting, speed changing, sliding (out-of-gear sliding, neutral sliding, accelerating sliding and parking sliding), braking (emergency braking, speed control braking and brake braking), accelerator speed control, steering, backing and the like; according to the load condition, the method mainly comprises the following steps: no-load, full load (equal to rated load), overload (exceeding rated load) and other operation conditions. In this embodiment, the current driving condition of the entire vehicle may be a driving condition distinguished according to a movement pattern of the vehicle.
It should be understood that the target gear refers to the gear the driver wants to change, for example: gear 2, gear 3, etc.
Further, in order to accurately determine the target gear, in this embodiment, the step S10 includes: determining the current running condition of the whole vehicle according to the vehicle speed signal and the accelerator pedal signal on the CAN bus; and determining a target gear according to the current running condition of the whole vehicle, the current gear, the state of a brake pedal and the gradient signal.
Referring to fig. 3, fig. 3 is a logic diagram of the upshift control method according to the present invention.
As shown in fig. 3, the ordinate in fig. 3 represents the accelerator opening degree, i.e., the accelerator pedal signal, and the abscissa represents the vehicle speed, i.e., the vehicle speed signal, each of the broken lines corresponding to a different intention of an upshift. For example, when the whole vehicle is at a standstill and the vehicle speed is 0km/h, the driver puts the shift lever into the forward gear (D gear) and starts to step on the accelerator, so that the accelerator opening is increased from 0% to a certain value, for example, to 20% and keeps the opening unchanged, the transmission is in the 1 gear and controls the engagement degree of the clutch according to the engine speed and the engine torque, and the starting control of the whole vehicle is completed. Along with the increase of the vehicle speed, when the vehicle speed is greater than 12km/h (namely, the vehicle speed value corresponding to the intersection of a broken line corresponding to 1-liter-2-shift and 30% of accelerator opening degree in fig. 3), the transmission control module judges that the driver needs to execute the upshift, and sends out a target gear equal to 2-gear on the CAN bus for displaying by an instrument to remind the driver of the upcoming upshift.
According to the method and the device, the target gear is determined according to the current running condition of the whole vehicle, the current gear, the state of a brake pedal and a gradient signal, and the target gear can be accurately determined according to a logic schematic diagram.
Step S20: performing an upshift operation according to the target gear, and performing torque compensation at the start of torque exchange to increase wheel-end torque;
it should be understood that torque exchange refers to the process of transferring engine torque from one clutch to another.
In the concrete implementation, because the speed ratio becomes small after the upshift, energy loss exists in the clutch slip in the gear shifting process and other factors, the torque at the wheel end is obviously smaller in the upshift process and causes the jerk, and therefore the problem of the jerk can be effectively solved by increasing the torque at the wheel end in the upshift process.
Step S30: stopping torque compensation when the torque exchange is finished, and adjusting the rotating speed of the engine;
in particular implementations, a transmission control module may adjust engine speed by sending a torque down request to control a shift mechanism.
Step S40: and judging whether the vehicle successfully upshifts according to the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear.
Further, in order to determine whether the vehicle upshifts successfully, in the present embodiment, the step S40 includes: and when the difference value between the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear is smaller than a preset threshold value, judging that the vehicle is successfully shifted up.
It should be noted that the preset threshold refers to a preset threshold, which can be set according to actual situations, and this embodiment does not specifically limit this.
It is understood that the target gear speed corresponding to the target gear refers to the input shaft speed corresponding to the target gear, for example, the vehicle is upshifted from 1 gear to 2 gear, and the target gear speed is the input shaft speed of 2 gear.
In the specific implementation, when the difference value between the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear is smaller than a preset threshold value, it is determined that the vehicle is successfully upshifted; and when the difference value between the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear is larger than or equal to a preset threshold value, judging that the vehicle is failed to upshift.
In the embodiment, when the difference value between the adjusted engine speed and the target gear speed corresponding to the target gear is smaller than the preset threshold value, it is determined that the vehicle is successfully upshifted, and whether the vehicle is successfully upshifted can be accurately determined, so that the vehicle is upshifted.
In the embodiment, the current running condition of the whole vehicle is obtained, the target gear is determined according to the current running condition of the whole vehicle, the gear-up operation is executed according to the target gear, the torque compensation is performed when the torque exchange is started to increase the wheel end torque, the torque compensation is stopped when the torque exchange is finished, the rotating speed of the engine is adjusted, and whether the vehicle is successfully subjected to the gear-up is judged according to the adjusted rotating speed of the engine and the rotating speed of the target gear corresponding to the target gear. The torque compensation is carried out when the torque exchange is started so as to increase the wheel end torque, the torque compensation is stopped when the torque exchange is finished, the wheel end torque can be effectively compensated, whether the vehicle is successfully shifted or not is judged according to the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear, and therefore gear shifting frustration in the shifting process caused by different gear speed ratio differences and energy loss can be effectively compensated, the gear shifting smoothness of the double-clutch transmission is effectively improved, and the driving quality of the whole vehicle is improved.
Referring to fig. 4, fig. 4 is a flowchart illustrating an upshift control method according to a second embodiment of the present invention.
Based on the first embodiment described above, in the present embodiment, the step S20 includes:
step S201: controlling the vehicle to pre-shift according to the target gear;
in the present embodiment, a process of upshifting by 1 gear and 2 gear is explained, and referring to fig. 5, fig. 5 is a schematic diagram of the process of upshifting by 2 gear by 1 gear according to the upshift control method of the present invention.
As shown in fig. 5, phase 1 in fig. 5 represents a pre-shift phase, phase 2 represents a pre-charge phase, phase 3 represents a torque exchange phase, and phase 4 represents a speed synchronization phase. The clutches 1 and 2 refer to two clutches in a dual clutch transmission, the 1-shaft rotating speed refers to the rotating speed corresponding to the odd gears, namely the rotating speed corresponding to the 1, 3, 5 and 7 gears, and the 2-shaft rotating speed refers to the rotating speed corresponding to the even gears, namely the rotating speed corresponding to the 2, 4 and 6 gears.
It can be understood that pre-shifting means that when the vehicle speed reaches the moment of 1 gear up to 2 gears, the target gear is triggered to change from 1 gear to 2 gears, the transmission control module drives the gear shifting mechanism, the 2 gear synchronizer is combined, 2 gear pre-engagement is completed, and the rotating speed of the 2 shaft is the same as the rotating speed of the 2 gear.
Step S202: when the vehicle pre-shifting is finished, controlling the vehicle to pre-charge oil;
it will be appreciated that after completing the pre-engagement, the transmission control module begins controlling the hydraulic system to pre-charge the clutch 2 and gradually brings the clutch 2 to a semi-engagement point. During the pre-fill phase, the engine torque is still completely transmitted by the clutch 1.
Step S203: and when the vehicle pre-charging is finished, controlling the vehicle to perform torque exchange, and performing torque compensation at the beginning of the torque exchange so as to increase the wheel end torque.
It can be understood that when the pre-charging is completed, the transmission control module controls the transmission to start torque exchange, the pressure of the clutch 1 is gradually reduced, the pressure of the clutch 2 is gradually increased, the process belongs to a dynamic coupling process, and the engine torque is completely transmitted by the clutch 1 from the beginning, gradually changed into the common transmission of the clutch 1 and the clutch 2, and finally completely transmitted by the clutch 2.
Further, in order to determine the timing of performing the torque compensation, in the present embodiment, the step S203 includes: when the vehicle pre-charging is finished, controlling the vehicle to carry out torque exchange; when torque exchange starts, judging whether an effective torque increasing request zone bit is received or not; and when the effective torque increasing request zone bit is received, performing torque compensation to increase the wheel end torque.
It should be noted that, in this embodiment, the valid torque-up request flag bit may be predefined to be 1, and the invalid request flag bit may be predefined to be 0.
In a specific implementation, the transmission control module may send a torque compensation request to the engine control module over the CAN bus, where the torque compensation request may include a torque increase request flag, and the engine control module may perform torque compensation to increase the wheel-end torque when receiving an active torque increase request flag.
Further, the step of performing torque compensation to increase the wheel-end torque when the effective torque increase request flag is received specifically includes: when the effective torque-increasing request zone bit is received, acquiring a torque-increasing request value; and carrying out torque compensation on the vehicle according to the torque increasing request value so as to increase the wheel end torque.
In the present embodiment, the process of the 1 st gear up-shift and 2 nd gear is explained, and referring to fig. 6, fig. 6 is a torque compensation schematic diagram of the 1 st gear up-shift and 2 nd gear of the upshift control method of the present invention.
As shown in fig. 6, the torque increase request flag in fig. 6 indicates an invalid torque increase request flag when it is 0, and indicates an effective torque increase request flag when it is 1, and the TCU torque increase request value has the same meaning as the torque increase request value.
It can be understood that the torque increase request flag is 1 at the beginning of torque exchange, and the torque increase request value gradually increases, and the absolute value of the torque increase request value, the rising slope and the falling slope can be adjusted according to different gears, which is the change situation of the torque increase request value during the 1-gear and 2-gear upshifts in fig. 6.
In a specific implementation, the request value for increasing the torque is generally increased and then decreased, and the specific request value for increasing the torque may be calibrated according to an actual situation, which is not specifically limited in this embodiment.
According to the embodiment, torque compensation is carried out on the vehicle according to the torque increasing request value so as to increase the wheel end torque, and the wheel end torque can be compensated, so that gear shifting pause and frustration in the gear-up process caused by different gear speed ratio differences and energy loss can be effectively compensated.
The method comprises the steps of controlling a vehicle to perform pre-shifting according to a target gear, controlling the vehicle to perform pre-charging when the pre-shifting of the vehicle is completed, controlling the vehicle to perform torque exchange when the pre-charging of the vehicle is completed, and performing torque compensation when the torque exchange is started so as to increase wheel-end torque. This embodiment shifts in advance, pre-charge oil, moment of torsion exchange and torque compensation through the control wheel, can control the vehicle and carry out the moment of torsion compensation at the in-process that shifts to effective compensation shifts and pause because of the process that shifts that different gear speed ratio difference, energy loss lead to, effectively improves the ride comfort that shifts that rises of double clutch transmission, promotes whole car and drives the quality then.
Referring to fig. 7, fig. 7 is a flowchart illustrating a third embodiment of the upshift control method according to the present invention.
Based on the above embodiments, in the present embodiment, the step S30 includes:
step S301: when the torque exchange is finished, judging whether an invalid torque increasing request zone bit is received or not;
it can be understood that, as can be seen in connection with fig. 6, at the end of the torque exchange, the torque-up request flag is 0, i.e., the torque-up request flag is invalid.
Step S302: stopping torque compensation when the invalid torque increasing request zone bit is received, and adjusting the rotating speed of the engine to enable the adjusted rotating speed of the engine to be the same as the rotating speed of the target gear corresponding to the target gear.
It is to be understood that when the torque increase request flag is 0, the torque increase request value is also 0, which corresponds to the time at which the torque compensation has been stopped.
It can be understood that the transmission control module controls the gear shifting mechanism by sending a torque reduction request, and can adjust the engine speed so that the adjusted engine speed is the same as the target gear speed corresponding to the target gear, and in the process of adjusting the engine speed, the adjusted engine speed is basically the same as the target gear speed corresponding to the target gear.
Further, referring to fig. 8 and 9, fig. 8 is a graph of acceleration without torque compensation according to the upshift control method of the present invention, and fig. 9 is a graph of acceleration with torque compensation according to the upshift control method of the present invention.
As shown in fig. 8, during the 1 st gear up and 2 nd gear up and the 2 nd gear up and 3 rd gear up, the acceleration curve has a significant drop pit, and the whole vehicle has a significant jerk feeling. After torque compensation is carried out, as shown in fig. 9, the acceleration smoothness of the whole vehicle is obviously improved, and the whole vehicle has no obvious pause in the gear-up process.
In this embodiment, when the torque exchange is finished, it is determined whether an invalid torque increase request flag is received, torque compensation is stopped when the invalid torque increase request flag is received, and the engine speed is adjusted so that the adjusted engine speed is the same as the target gear speed corresponding to the target gear. The embodiment stops torque compensation when torque exchange is finished, adjusts the rotating speed of the engine, can effectively compensate gear shifting pause and frustration in the gear-up process caused by different gear speed ratio differences and energy loss, effectively improves gear-up smoothness of the double-clutch transmission, and then improves the driving quality of the whole vehicle.
Furthermore, an embodiment of the present invention further provides a storage medium, on which an upshift control program is stored, where the upshift control program, when executed by a processor, implements the upshift control method as described above.
Referring to fig. 10, fig. 10 is a block diagram illustrating a first embodiment of the upshift control device according to the present invention.
As shown in fig. 10, an upshift control device according to an embodiment of the present invention includes:
the working condition identification module 10 is used for acquiring the current whole vehicle running working condition and determining a target gear according to the current whole vehicle running working condition;
a torque compensation module 20, configured to perform an upshift operation according to the target gear and perform torque compensation at the beginning of a torque exchange to increase wheel-end torque;
a rotation speed adjusting module 30, configured to stop torque compensation when torque exchange is finished, and adjust the rotation speed of the engine;
and the gear-up judging module 40 is used for judging whether the vehicle is successfully gear-up according to the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear.
A second embodiment of the upshift control device according to the present invention is proposed based on the above first embodiment of the upshift control device according to the present invention.
In this embodiment, the working condition identifying module 10 is further configured to determine a current driving working condition of the entire vehicle according to a vehicle speed signal and an accelerator pedal signal on the CAN bus; and determining a target gear according to the current running condition of the whole vehicle, the current gear, the state of a brake pedal and the gradient signal.
Further, the torque compensation module 20 is further configured to control the vehicle to perform pre-shifting according to the target gear; when the vehicle pre-shifting is finished, controlling the vehicle to pre-charge oil; and when the vehicle pre-charging is finished, controlling the vehicle to perform torque exchange, and performing torque compensation at the beginning of the torque exchange so as to increase the wheel end torque.
Further, the torque compensation module 20 is further configured to control the vehicle to perform torque exchange when the vehicle prefill is completed; when torque exchange starts, judging whether an effective torque increasing request zone bit is received or not; and when the effective torque increasing request zone bit is received, performing torque compensation to increase the wheel end torque.
Further, the torque compensation module 20 is further configured to obtain a torque increase request value when the effective torque increase request flag is received; and carrying out torque compensation on the vehicle according to the torque increasing request value so as to increase the wheel end torque.
Further, the rotation speed adjusting module 30 is further configured to determine whether an invalid torque increase request flag is received when the torque exchange is finished; stopping torque compensation when the invalid torque increasing request zone bit is received, and adjusting the rotating speed of the engine to enable the adjusted rotating speed of the engine to be the same as the rotating speed of the target gear corresponding to the target gear.
Further, the upshift judging module 40 is further configured to determine that the vehicle upshifts successfully when a difference between the adjusted engine speed and a target gear speed corresponding to the target gear is smaller than a preset threshold.
Other embodiments or specific implementation manners of the upshift control device of the present invention may refer to the above method embodiments, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., a rom/ram, a magnetic disk, an optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An upshift control method, characterized by comprising:
acquiring a current whole vehicle running condition, and determining a target gear according to the current whole vehicle running condition;
performing an upshift operation according to the target gear, and performing torque compensation at the start of torque exchange to increase wheel-end torque;
stopping torque compensation when the torque exchange is finished, and adjusting the rotating speed of the engine;
and judging whether the vehicle successfully upshifts according to the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear.
2. The upshift control method according to claim 1, wherein the step of obtaining a current vehicle running condition and determining a target gear according to the current vehicle running condition specifically comprises:
determining the current running condition of the whole vehicle according to the vehicle speed signal and the accelerator pedal signal on the CAN bus;
and determining a target gear according to the current running condition of the whole vehicle, the current gear, the state of a brake pedal and the gradient signal.
3. The upshift control method according to claim 1, wherein the step of performing an upshift operation according to the target gear and performing torque compensation at the start of a torque interchange to increase wheel-end torque specifically comprises:
controlling the vehicle to pre-shift according to the target gear;
when the vehicle pre-shifting is finished, controlling the vehicle to pre-charge oil;
and when the vehicle pre-charging is finished, controlling the vehicle to perform torque exchange, and performing torque compensation at the beginning of the torque exchange so as to increase the wheel end torque.
4. The upshift control method of claim 3, wherein said step of controlling the vehicle to perform a torque interchange when the vehicle prefill is completed and to perform a torque compensation at the start of the torque interchange to increase the wheel-end torque comprises:
when the vehicle pre-charging is finished, controlling the vehicle to carry out torque exchange;
when torque exchange starts, judging whether an effective torque increasing request zone bit is received or not;
and when the effective torque increasing request zone bit is received, performing torque compensation to increase the wheel end torque.
5. The upshift control method of claim 4, wherein said step of performing torque compensation to increase wheel-end torque upon receiving said active torque-increase request flag specifically comprises:
when the effective torque-increasing request zone bit is received, acquiring a torque-increasing request value;
and carrying out torque compensation on the vehicle according to the torque increasing request value so as to increase the wheel end torque.
6. The upshift control method according to claim 1, wherein said step of stopping torque compensation at the end of the torque interchange and adjusting the engine speed specifically comprises:
when the torque exchange is finished, judging whether an invalid torque increasing request zone bit is received or not;
stopping torque compensation when the invalid torque increasing request zone bit is received, and adjusting the rotating speed of the engine to enable the adjusted rotating speed of the engine to be the same as the rotating speed of the target gear corresponding to the target gear.
7. The upshift control method according to claim 5, wherein the step of determining whether the vehicle has successfully upshifted according to the adjusted engine speed and the target gear speed corresponding to the target gear specifically comprises:
and when the difference value between the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear is smaller than a preset threshold value, judging that the vehicle is successfully shifted up.
8. An upshift control device, characterized by comprising:
the working condition identification module is used for acquiring the current whole vehicle running working condition and determining a target gear according to the current whole vehicle running working condition;
the torque compensation module is used for executing an upshift operation according to the target gear and performing torque compensation at the beginning of torque exchange so as to increase wheel-end torque;
the rotating speed adjusting module is used for stopping torque compensation when torque exchange is finished and adjusting the rotating speed of the engine;
and the gear-up judging module is used for judging whether the vehicle is successfully shifted up according to the adjusted engine rotating speed and the target gear rotating speed corresponding to the target gear.
9. An upshift control device, characterized by comprising: a memory, a processor and an upshift control program stored on said memory and executable on said processor, said upshift control program being configured to implement an upshift control method according to any one of claims 1 to 7.
10. A storage medium having stored thereon an upshift control program which, when executed by a processor, implements an upshift control method according to any one of claims 1 to 7.
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| CN202111035513.2A CN113734137A (en) | 2021-09-03 | 2021-09-03 | Upshift control method, device, equipment and storage medium |
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| CN202111035513.2A CN113734137A (en) | 2021-09-03 | 2021-09-03 | Upshift control method, device, equipment and storage medium |
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