CN113266673A - Gearbox pre-gear-shifting method, automobile and readable storage medium - Google Patents
Gearbox pre-gear-shifting method, automobile and readable storage medium Download PDFInfo
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- CN113266673A CN113266673A CN202110683247.8A CN202110683247A CN113266673A CN 113266673 A CN113266673 A CN 113266673A CN 202110683247 A CN202110683247 A CN 202110683247A CN 113266673 A CN113266673 A CN 113266673A
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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
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift 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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/24—Inputs being a function of torque or torque demand dependent on the throttle opening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
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Abstract
The invention discloses a gearbox pre-gear-shifting method, an automobile and a readable storage medium, wherein the method comprises the following steps: when a vehicle is started, acquiring a reverse gear engaging signal, and executing a pre-engaging strategy according to the reverse gear engaging signal; detecting the opening degree of an accelerator pedal of the vehicle, and judging whether the opening degree of the accelerator pedal is larger than a preset opening degree of the accelerator; and when the opening degree of the accelerator pedal is larger than the preset opening degree of the accelerator, quitting the pre-gear-engaging strategy and controlling the vehicle to run in a starting mode. According to the invention, by acquiring the reverse gear engaging signal, a pre-engaging strategy can be executed when the vehicle engages in the reverse gear, so that the phenomenon of shaking and pause in static gear shifting is effectively avoided; and the pre-engagement strategy can be selected to be exited according to the opening degree of the accelerator pedal by detecting the opening degree of the accelerator pedal of the vehicle so as to control the vehicle to run in a starting mode, so that the problem of slow power response during reverse gear starting is solved.
Description
Technical Field
The invention relates to the field of automobile application, in particular to a gearbox pre-gear-shifting method, an automobile and a readable storage medium.
Background
With the development of the technical level of automobiles, the requirements of people on the driving performance and the comfort are higher and higher, the driving comfort of the whole automobile is improved, on one hand, the requirements of customers are met, complaints are reduced, and meanwhile, the product strength and the competitiveness of the whole automobile can be better embodied.
The whole vehicle matched with DCT at present has the defects in the reverse gear use process: the shaking and jerking phenomena exist during static gear shifting (P gear, R gear, N gear and D gear are switched back and forth), and the shaking and jerking phenomena are obvious particularly when the R gear (reverse gear) and the D gear (forward gear) are entered.
Therefore, the prior art has yet to be improved.
Disclosure of Invention
The invention provides a transmission pre-gear method, an automobile and a readable storage medium to solve the technical problem of the prior art, and aims to solve the problem of the pause and the frustration when the reverse gear is engaged in the prior transmission.
The technical scheme adopted by the invention for solving the technical problem is as follows:
in a first aspect, the present invention provides a method of pre-engaging a transmission, the method comprising the steps of:
when a vehicle is started, acquiring a reverse gear engaging signal, and executing a pre-engaging strategy according to the reverse gear engaging signal;
detecting the opening degree of an accelerator pedal of the vehicle, and judging whether the opening degree of the accelerator pedal is larger than a preset opening degree of the accelerator;
and when the opening degree of the accelerator pedal is larger than the preset opening degree of the accelerator, quitting the pre-gear-engaging strategy and controlling the vehicle to run in a starting mode.
In one implementation, when a vehicle is started, acquiring a reverse gear engaging signal and executing a pre-engagement strategy according to the reverse gear engaging signal, previously include:
monitoring a start state of the vehicle.
In one implementation, the obtaining a reverse gear engagement signal and executing a pre-engagement strategy according to the reverse gear engagement signal when a vehicle is started includes:
when the vehicle is started, acquiring a gear engaging signal of a gearbox control unit in the vehicle;
judging whether the vehicle is in a reverse gear according to the gear engaging signal;
when the vehicle is engaged in a reverse gear, sending a pre-gear-engagement instruction through the gearbox control unit;
pre-engaging a shift fork of a first gear of the vehicle according to the pre-engaging command to implement the pre-engaging strategy.
In one implementation, the detecting an accelerator pedal opening degree of the vehicle and determining whether the accelerator pedal opening degree is greater than a preset accelerator opening degree includes:
detecting an accelerator pedal signal of the vehicle;
when an accelerator pedal signal of the vehicle is detected, determining the opening degree of an accelerator pedal according to the accelerator pedal signal;
and acquiring the preset accelerator opening, and judging whether the accelerator pedal opening is larger than the preset accelerator opening.
In one implementation, the detecting an accelerator pedal signal of the vehicle further includes:
when an accelerator pedal signal of the vehicle is not detected, controlling a brake pedal of the vehicle to enter a release state;
the method comprises the steps of obtaining a first output torque, and controlling an engine of the vehicle to output a corresponding torque according to the first output torque so as to enable the vehicle to enter a creeping state.
In one implementation, the exiting the pre-shift strategy and controlling the vehicle to run in a starting mode when the accelerator pedal opening is greater than a preset accelerator opening includes:
when the opening degree of the accelerator pedal is larger than the preset opening degree of the accelerator, controlling a brake pedal of the vehicle to enter a release state;
acquiring the real-time rotating speed of the vehicle, and judging whether the real-time rotating speed meets the condition of exiting the pre-gear strategy or not;
and when the real-time rotating speed meets the condition of exiting the pre-gear strategy, exiting the pre-gear strategy and controlling the vehicle to run in a starting mode.
In one implementation, the obtaining a real-time rotation speed of the vehicle and determining whether the real-time rotation speed meets a condition for exiting the pre-shift strategy includes:
acquiring the real-time rotating speed of the vehicle through a rotating speed sensor;
judging whether the real-time rotating speed is greater than a preset rotating speed or not;
and when the real-time rotating speed is greater than the preset rotating speed, judging that the real-time rotating speed meets the condition of exiting the pre-gear-shifting strategy.
In one implementation, the exiting the pre-engagement strategy and controlling the vehicle to run in a starting mode when the real-time rotation speed meets a condition for exiting the pre-engagement strategy comprises:
sending a pre-gear-out instruction through the gearbox control unit;
according to the pre-gear withdrawing command, a shifting fork of a first gear of the vehicle is withdrawn, and the pre-gear withdrawing strategy is carried out;
and acquiring a second output torque, and controlling an engine of the vehicle to output a corresponding torque according to the second output torque so as to control the vehicle to run in a starting mode.
In a second aspect, the present invention provides an automobile comprising: a processor and a memory, said memory storing a gearbox pre-engagement program, said gearbox pre-engagement program being executable by said processor for implementing the gearbox pre-engagement method according to the first aspect.
In a third aspect, the present invention provides a readable storage medium storing a gearbox pre-shift procedure which, when executed by a processor, is adapted to carrying out the gearbox pre-shift method according to the first aspect.
The invention adopts the technical scheme and has the following effects:
according to the invention, by acquiring the reverse gear engaging signal, a pre-engaging strategy can be executed when the vehicle engages in the reverse gear, so that the phenomenon of shaking and pause in static gear shifting is effectively avoided; and the pre-engagement strategy can be selected to be exited according to the opening degree of the accelerator pedal by detecting the opening degree of the accelerator pedal of the vehicle so as to control the vehicle to run in a starting mode, so that the problem of slow power response during reverse gear starting is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a flow chart of a transmission pre-shift method in one implementation of the invention.
Fig. 2 is a schematic diagram of a gearbox in one implementation of the present invention.
FIG. 3 is a functional schematic of an automobile in one implementation of the 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
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Exemplary method
As shown in fig. 1, an embodiment of the present invention provides a transmission pre-shift method, including the following steps:
and S100, when the vehicle is started, acquiring a reverse gear engaging signal, and executing a pre-engaging strategy according to the reverse gear engaging signal.
In the embodiment, the transmission pre-gear shifting method is applied to an onboard control terminal in an automobile, wherein the onboard control terminal comprises but is not limited to: intelligent equipment such as vehicle-mounted computers, computers and mobile terminals.
In this embodiment, the transmission controlled by the transmission control unit is a dual clutch transmission (i.e. a DCT transmission), and the structure of the transmission is shown in fig. 2; the DCT transmission is structurally arranged and consists of a structure with double input shafts and double output shafts, and a plurality of gear pairs, synchronizers and shifting forks are arranged inside the DCT transmission; for example, when the first gear is in the gear running, other gear pairs are in a pre-engaged or idle state, and if a torque sudden change phenomenon occurs, vibration of the pre-engaged gear is easily caused, so that a phenomenon of impact or abnormal sound is generated; if the pre-engagement is not carried out, the characteristic of no power interruption of the double-clutch transmission is lost.
The drivability of the automobile is a comprehensive performance expression, the related parts are many, and the optimization application in the gear shifting strategy is a good mode aiming at the problem of the R gear (reverse gear), so that the target requirements can be met, and the cost of optimizing hardware can be saved. Some host plants address the above problems from the NVH perspective (Noise, Vibration, Harshness), such as: the adoption of the means of optimizing the suspension, adding soundproof cotton and the like can achieve acceptable effects, but the cost is high, and the time and the labor are wasted.
In the embodiment, a pre-gear-shifting strategy is implemented based on a gearbox control unit, and when a vehicle is shifted into a reverse gear, a corresponding gear-shifting instruction is sent out to pre-shift a first-gear shifting fork of the vehicle; the pre-gear-shifting strategy is that when one gear is operated (for example, R gear), a gear set of the next gear (for example, 1 gear) is engaged, and a clutch corresponding to the gear is in a disengaged state; when a gear shift is required, the current gear (e.g., R gear) is disengaged and the clutch of the next gear (e.g., 1 gear) is engaged.
When the pre-gear-shifting strategy is executed, if the accelerator pedal signal is not detected at the moment, the vehicle is controlled to run in a creeping state after the brake pedal is released, so that the shaking phenomenon generated in the static gear shifting process can be effectively avoided or the frequency of the shaking and pause phenomenon is reduced; if the accelerator pedal signal is detected, after the brake pedal is released, the pre-gear-engagement strategy is exited according to the rotating speed of the vehicle, so that the vehicle is controlled to run in a starting mode, the impact phenomenon during R gear starting can be solved, and the problem of slow response during entering the R gear is avoided.
When the pre-gear-shifting strategy of the embodiment is implemented in real time, the starting state of the vehicle needs to be monitored first, and then the pre-gear-shifting strategy is executed according to the starting state of the vehicle and the gear-shifting information. Specifically, the determination may be made based on ignition information of the vehicle while monitoring a starting state of the vehicle; by acquiring the ignition information of the vehicle, whether the vehicle is in an ignition state or not can be judged according to the ignition information; when the vehicle is in an ignition state, it is determined that the vehicle is in a starting state.
That is, in one implementation manner of the present embodiment, step 100 includes the following steps before:
step 001, monitoring the starting state of the vehicle.
In this embodiment, when the vehicle is started, a reverse gear engaging signal of the vehicle may be acquired, and then a pre-engagement strategy is executed according to the reverse gear engaging signal; when the pre-gear-shifting strategy is executed, the transmission control unit of the vehicle can send out a corresponding control instruction and pre-shift a shifting fork of a first gear of the transmission of the vehicle, so that the subsequent power needed after gear shifting can be quickly and sufficiently responded when a handle of the vehicle is shifted into a D gear.
Specifically, when the vehicle is started, a gear engaging signal of a gearbox control unit in the vehicle can be acquired, and then whether the vehicle is engaged in a reverse gear or not is judged according to the gear engaging signal; each gear corresponds to a gear engaging signal in a gearbox of the vehicle; as shown in fig. 2, the gear engaging signal corresponding to the R gear is an output signal of a fourth sensor of the transmission output shaft 1.
Further, when the vehicle is in a reverse gear, a pre-gear command is sent through the gearbox control unit, and then a shifting fork of a first gear of the vehicle is pre-engaged according to the pre-gear command so as to execute the pre-gear strategy; it can be understood that when the gearbox control unit detects that the gear shifting handle is in the R gear, the gearbox control unit sends the pre-gear-shifting instruction to the internal electromagnetic valve, and controls the gear-shifting fork through the electromagnetic valve inside the gearbox, so that the 1 gear is pre-shifted.
That is, in an implementation manner of this embodiment, step S100 specifically includes the following steps:
step S110, when the vehicle is started, acquiring a gear engaging signal of a gearbox control unit in the vehicle;
step S120, judging whether the vehicle is in reverse gear according to the gear engaging signal;
step S130, when the vehicle is in reverse gear, a pre-gear-shifting instruction is sent through the gearbox control unit;
and step S140, pre-engaging a shifting fork of a first gear of the vehicle according to the pre-engaging command so as to execute the pre-engaging strategy.
In the embodiment, when the vehicle is started, the gear engaging signal of the gearbox control unit is obtained, and when the vehicle is engaged into a reverse gear, the shifting fork of the first gear of the vehicle can be pre-engaged to execute a pre-engaging strategy, so that when the handle of a subsequent vehicle is engaged into the D gear, the power required after the D gear is engaged can be quickly and sufficiently responded.
In one implementation of the embodiment of the invention, as shown in fig. 1, the method for pre-engaging a transmission further comprises the steps of:
and step S200, detecting the opening degree of an accelerator pedal of the vehicle, and judging whether the opening degree of the accelerator pedal is larger than a preset opening degree of the accelerator.
In this embodiment, after the vehicle executes the pre-shift strategy, it is further required to detect an accelerator pedal opening of the vehicle, and determine whether the accelerator pedal opening is greater than a preset accelerator opening; the purpose of detecting the opening degree of the accelerator pedal of the vehicle is to determine whether the vehicle needs to be controlled to enter a creeping mode or a starting mode according to a detected accelerator pedal signal.
Specifically, when the opening degree of an accelerator pedal of the vehicle is detected, the opening degree of the accelerator pedal can be monitored through an accelerator pedal signal of the vehicle; when an accelerator pedal signal of the vehicle is detected, the accelerator pedal opening degree can be further determined according to the accelerator pedal signal; the accelerator pedal signal is a signal corresponding to an accelerator pedal sensor, and the accelerator pedal opening is the opening degree of an air inlet valve detected by the accelerator pedal sensor.
After the accelerator pedal opening degree is obtained, acquiring the preset accelerator opening degree, and judging whether the accelerator pedal opening degree is larger than the preset accelerator opening degree; the preset accelerator opening is the accelerator opening of the vehicle in a starting mode, and the power generated by the accelerator opening in the starting mode is sufficient, so that the phenomenon of response delay is avoided; and when the opening degree of the accelerator pedal is larger than the preset opening degree of the accelerator, the vehicle can exit the pre-gear strategy at the moment, and the vehicle is controlled to run according to the set starting mode.
That is, in an implementation manner of this embodiment, the step S200 specifically includes the following steps:
step S210, detecting an accelerator pedal signal of the vehicle;
step S220, when an accelerator pedal signal of the vehicle is detected, determining the opening degree of the accelerator pedal according to the accelerator pedal signal;
and step S230, acquiring the preset accelerator opening, and judging whether the accelerator pedal opening is larger than the preset accelerator opening.
In this embodiment, when the accelerator pedal signal of the vehicle is detected, if the accelerator pedal signal of the vehicle is not detected, it indicates that the driver does not step on the accelerator pedal; at the moment, a brake pedal of the vehicle can be controlled to enter a release state, and first output torque is obtained; the first output torque may be an output torque set by the vehicle when the vehicle leaves a factory, or may be a torque set by a user to meet a requirement for a reverse gear.
After the first output torque is obtained, the engine of the vehicle can be controlled to output corresponding torque according to the first output torque so as to enable the vehicle to enter a creeping state; the creep state refers to a state that the vehicle runs at a constant speed according to a set speed or at a constant speed according to a set torque under a good working condition; it should be noted that, in the creep state, the vehicle runs smoothly, and by controlling the vehicle to enter the creep state, the shaking and jerking phenomenon occurring during static gear shifting can be effectively avoided, or the frequency of the shaking and jerking phenomenon occurring in the vehicle can be reduced.
In this embodiment, that is, in an implementation manner of this embodiment, after the step S210, the following steps are further included:
step S211, when an accelerator pedal signal of the vehicle is not detected, controlling a brake pedal of the vehicle to enter a release state;
step S212, acquiring a first output torque, and controlling an engine of the vehicle to output a corresponding torque according to the first output torque so as to enable the vehicle to enter a creeping state.
In the embodiment, the opening degree of an accelerator pedal can be determined according to the signal of the accelerator pedal by detecting the signal of the accelerator pedal of the vehicle, and then whether the pre-gear-engagement strategy needs to be exited or not is determined according to the opening degree of the accelerator pedal; and when the accelerator pedal signal is not detected, the vehicle is controlled to enter a creeping state, so that the shaking and pause phenomena during static gear shifting can be effectively avoided.
In one implementation of the embodiment of the invention, as shown in fig. 1, the method for pre-engaging a transmission further comprises the steps of:
and step S300, when the opening degree of the accelerator pedal is larger than a preset opening degree of the accelerator, quitting the pre-gear strategy, and controlling the vehicle to run in a starting mode.
In the embodiment, when an accelerator pedal signal is detected, whether the pre-gear strategy needs to be exited is determined according to the opening degree of the accelerator pedal; when the opening degree of the accelerator pedal is larger than a preset accelerator opening degree, quitting the pre-gear-engaging strategy; the preset accelerator opening degree can be an accelerator opening degree set by a factory or a self-defined accelerator opening degree; for example, the preset accelerator opening is one fourth of the accelerator opening in a full-open state; after the pre-gear strategy is quitted, the vehicle is controlled to run in a starting mode, and power required by starting can be responded quickly.
Specifically, when the brake pedal is controlled, whether the brake pedal is in a braking state is detected; if the brake pedal is in the braking state, controlling the brake pedal of the vehicle to enter a release state; and if the brake pedal is in a released state, the current rotating speed information of the vehicle can be directly acquired.
Further, when the current rotating speed information of the vehicle is obtained, the real-time rotating speed of the vehicle can be obtained through a rotating speed sensor, and then whether the real-time rotating speed meets the condition of exiting the pre-gear strategy or not is judged; wherein the condition for exiting the pre-gear strategy is as follows: the real-time rotating speed of the vehicle is greater than the preset rotating speed; and when the real-time rotating speed meets the condition of exiting the pre-gear strategy (namely the real-time rotating speed is greater than the preset rotating speed), exiting the pre-gear strategy and controlling the vehicle to run in a starting mode.
When the vehicle is controlled to run in a starting mode, the torque required by a driver is determined according to the real-time rotating speed, and then the engine of the vehicle is controlled to output the corresponding real-time torque according to the torque required by the driver, so that the vehicle is controlled to reach the speed required by the starting mode.
That is, in an implementation manner of this embodiment, the step S300 specifically includes the following steps:
step S310, when the opening degree of the accelerator pedal is larger than the preset opening degree of the accelerator, controlling a brake pedal of the vehicle to enter a release state;
step S320, acquiring the real-time rotating speed of the vehicle, and judging whether the real-time rotating speed meets the condition of exiting the pre-gear strategy;
and S330, when the real-time rotating speed meets the condition of exiting the pre-gear strategy, exiting the pre-gear strategy and controlling the vehicle to run in a starting mode.
In this embodiment, when determining whether the real-time rotation speed is greater than a preset rotation speed, the real-time rotation speed of the vehicle may be obtained by a rotation speed sensor, and then it is determined whether the real-time rotation speed is greater than the preset rotation speed; and when the real-time rotating speed is greater than the preset rotating speed, judging that the real-time rotating speed meets the condition of exiting the pre-gear strategy.
That is, in an implementation manner of this embodiment, step S320 specifically includes the following steps:
step S321, acquiring the real-time rotating speed of the vehicle through a rotating speed sensor;
step S322, judging whether the real-time rotating speed is greater than a preset rotating speed;
and step S323, when the real-time rotating speed is greater than the preset rotating speed, judging that the real-time rotating speed meets the condition of exiting the pre-gear strategy.
In this embodiment, when exiting the pre-shift strategy, the transmission control unit may first send an exit pre-shift instruction, and then, according to the exit pre-shift instruction, the shift fork of the first gear of the vehicle is shifted out to exit the pre-shift strategy; and finally, controlling the engine of the vehicle to output corresponding torque according to the second output torque by acquiring the second output torque, so that the vehicle can be controlled to run in a starting mode.
Step S331, sending an instruction of quitting pre-gear engagement through the gearbox control unit;
step S332, according to the pre-gear withdrawing command, a shifting fork of a first gear of the vehicle is withdrawn, and the pre-gear withdrawing strategy is carried out;
and step S333, acquiring a second output torque, and controlling the engine of the vehicle to output a corresponding torque according to the second output torque so as to control the vehicle to run in a starting mode.
For example, if the driver directly releases the brake pedal when the accelerator pedal signal is detected, the vehicle will be driven in a take-off mode. At this time, the torque input by the engine of the vehicle to the input end of the gearbox depends on the opening degree of the accelerator, namely the real-time torque of the engine of the vehicle corresponds to the opening degree of the accelerator pedal.
For engine specific operating conditions of the vehicle, for example: under tip in (immediate release after the accelerator pedal is stepped on) working condition, the engine of the vehicle has sudden change torque, and the sudden change torque can cause impact or abnormal sound of a pre-engaged gear after being input into the transmission. After the brake pedal is released, the input shaft of the gearbox has a certain rotating speed under the action of the clutch, and when the input shaft rotating speed sensor detects that the real-time rotating speed of the input shaft is greater than n (n is a standard quantity, and n can be 100rpm or 150rpm according to a specific vehicle type), the gearbox control unit controls the corresponding electromagnetic valve, so that the original pre-engaged 1-gear shifting fork is removed.
By removing the 1 st gear shifting fork which is pre-engaged originally, corresponding impact or abnormal sound can not be caused even if sudden change torque exists. When the input shaft rotating speed sensor detects that the rotating speed of the input shaft is less than n, the gearbox control unit controls the electromagnetic valve again to pre-engage the 1-gear shifting fork, and even if sudden change torque exists, the rear end of the gearbox cannot rotate due to low rotating speed, namely, the rear end of the gearbox cannot drive a vehicle to generate impact or abnormal sound.
According to the embodiment, the reverse gear engaging signal is obtained, so that a pre-engaging strategy can be executed when the vehicle is engaged in the reverse gear, and the phenomenon of shaking and pause in static gear shifting is effectively avoided; and the pre-engagement strategy can be selected to be exited according to the opening degree of the accelerator pedal by detecting the opening degree of the accelerator pedal of the vehicle so as to control the vehicle to run in a starting mode, so that the problem of slow power response during reverse gear starting is solved.
Exemplary device
Based on the above embodiments, the present invention further provides an automobile, and a schematic block diagram thereof may be as shown in fig. 3.
This car includes: a vehicle-mounted control terminal;
the vehicle-mounted control terminal includes: the system comprises a processor, a memory, an interface, a display screen and a communication module which are connected through a system bus; wherein the processor of the vehicle is configured to provide computing and control capabilities; the memory of the automobile comprises a readable storage medium and an internal memory; the readable storage medium stores an operating system and a computer program; the internal memory provides an environment for the operation of an operating system and a computer program in the readable storage medium; the interface is used for connecting external terminal equipment, such as mobile terminals and computers; the display screen is used for displaying corresponding vehicle control information; the communication module is used for communicating with a cloud server or a mobile terminal.
The computer program is adapted to be executed by a processor to implement a method of pre-engaging a gearbox.
It will be understood by those skilled in the art that the schematic block diagram shown in fig. 3 is only a block diagram of a portion of the structure associated with the inventive arrangements and is not intended to limit the vehicles to which the inventive arrangements may be applied, and that a particular vehicle may include more or less components than those shown, or may have some components combined, or a different arrangement of components.
In one embodiment, an automobile is provided, comprising: the transmission pre-shift program is executed by the processor to implement the transmission pre-shift method.
In one embodiment, a storage medium is provided, wherein the storage medium stores a gearbox pre-shift program, which when executed by a processor is used to implement the gearbox pre-shift method as above.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, the computer program can include the processes of the embodiments of the methods described above. Any reference to memory, storage, databases, or other media used in embodiments provided herein may include non-volatile and/or volatile memory.
In summary, the present invention provides a method for pre-engaging a transmission, a vehicle and a readable storage medium, wherein the method comprises: when a vehicle is started, acquiring a reverse gear engaging signal, and executing a pre-engaging strategy according to the reverse gear engaging signal; detecting the opening degree of an accelerator pedal of the vehicle, and judging whether the opening degree of the accelerator pedal is larger than a preset opening degree of the accelerator; and when the opening degree of the accelerator pedal is larger than the preset opening degree of the accelerator, quitting the pre-gear-engaging strategy and controlling the vehicle to run in a starting mode. According to the invention, by acquiring the reverse gear engaging signal, a pre-engaging strategy can be executed when the vehicle engages in the reverse gear, so that the phenomenon of shaking and pause in static gear shifting is effectively avoided; and the pre-engagement strategy can be selected to be exited according to the opening degree of the accelerator pedal by detecting the opening degree of the accelerator pedal of the vehicle so as to control the vehicle to run in a starting mode, so that the problem of slow power response during reverse gear starting is solved.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A method of pre-engaging a transmission, comprising the steps of:
when a vehicle is started, acquiring a reverse gear engaging signal, and executing a pre-engaging strategy according to the reverse gear engaging signal;
detecting the opening degree of an accelerator pedal of the vehicle, and judging whether the opening degree of the accelerator pedal is larger than a preset opening degree of the accelerator;
and when the opening degree of the accelerator pedal is larger than the preset opening degree of the accelerator, quitting the pre-gear-engaging strategy and controlling the vehicle to run in a starting mode.
2. A method of pre-engaging a gearbox according to claim 1, wherein said obtaining a reverse gear engagement signal when the vehicle is started and executing a pre-engagement strategy based on said reverse gear engagement signal, previously comprises:
monitoring a start state of the vehicle.
3. A method of pre-engaging a gearbox according to claim 1, wherein said obtaining a reverse gear engagement signal and implementing a pre-engagement strategy based on said reverse gear engagement signal when the vehicle is started comprises:
when the vehicle is started, acquiring a gear engaging signal of a gearbox control unit in the vehicle;
judging whether the vehicle is in a reverse gear according to the gear engaging signal;
when the vehicle is engaged in a reverse gear, sending a pre-gear-engagement instruction through the gearbox control unit;
pre-engaging a shift fork of a first gear of the vehicle according to the pre-engaging command to implement the pre-engaging strategy.
4. The gearbox pre-engagement method according to claim 1, wherein the detecting an accelerator pedal opening of the vehicle and determining whether the accelerator pedal opening is greater than a preset accelerator opening comprises:
detecting an accelerator pedal signal of the vehicle;
when an accelerator pedal signal of the vehicle is detected, determining the opening degree of an accelerator pedal according to the accelerator pedal signal;
and acquiring the preset accelerator opening, and judging whether the accelerator pedal opening is larger than the preset accelerator opening.
5. The method of pre-engaging a transmission of claim 4, wherein said detecting an accelerator pedal signal of said vehicle further comprises:
when an accelerator pedal signal of the vehicle is not detected, controlling a brake pedal of the vehicle to enter a release state;
the method comprises the steps of obtaining a first output torque, and controlling an engine of the vehicle to output a corresponding torque according to the first output torque so as to enable the vehicle to enter a creeping state.
6. The transmission pre-engagement method according to claim 1, wherein the exiting the pre-engagement strategy and controlling the vehicle to travel in a launch mode when the accelerator pedal opening is greater than a preset accelerator opening comprises:
when the opening degree of the accelerator pedal is larger than the preset opening degree of the accelerator, controlling a brake pedal of the vehicle to enter a release state;
acquiring the real-time rotating speed of the vehicle, and judging whether the real-time rotating speed meets the condition of exiting the pre-gear strategy or not;
and when the real-time rotating speed meets the condition of exiting the pre-gear strategy, exiting the pre-gear strategy and controlling the vehicle to run in a starting mode.
7. The transmission pre-engagement method according to claim 6, wherein the obtaining a real-time speed of the vehicle and determining whether the real-time speed meets a condition for exiting the pre-engagement strategy comprises:
acquiring the real-time rotating speed of the vehicle through a rotating speed sensor;
judging whether the real-time rotating speed is greater than a preset rotating speed or not;
and when the real-time rotating speed is greater than the preset rotating speed, judging that the real-time rotating speed meets the condition of exiting the pre-gear-shifting strategy.
8. The transmission pre-engagement method according to claim 6, wherein the exiting the pre-engagement strategy and controlling the vehicle to travel in a launch mode when the real-time rotation speed meets a condition for exiting the pre-engagement strategy comprises:
sending a pre-gear-out instruction through the gearbox control unit;
according to the pre-gear withdrawing command, a shifting fork of a first gear of the vehicle is withdrawn, and the pre-gear withdrawing strategy is carried out;
and acquiring a second output torque, and controlling an engine of the vehicle to output a corresponding torque according to the second output torque so as to control the vehicle to run in a starting mode.
9. An automobile, comprising: a processor and a memory storing a gearbox pre-engagement program, which, when executed by the processor, is adapted to carrying out the gearbox pre-engagement method according to any of claims 1-8.
10. A readable storage medium, characterized in that it stores a gearbox pre-shift program, which when executed by a processor is adapted to carrying out a gearbox pre-shift method according to any one of claims 1-8.
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