CN110067853A - A kind of vehicle shift method, device and equipment - Google Patents
A kind of vehicle shift method, device and equipment Download PDFInfo
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- CN110067853A CN110067853A CN201910312588.7A CN201910312588A CN110067853A CN 110067853 A CN110067853 A CN 110067853A CN 201910312588 A CN201910312588 A CN 201910312588A CN 110067853 A CN110067853 A CN 110067853A
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H59/46—Inputs being a function of speed dependent on a comparison between speeds
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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
- F16H59/36—Inputs being a function of speed
- F16H2059/366—Engine or motor speed
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
Abstract
The present invention relates to a kind of vehicle shift method, device and equipments, including when receiving shift request, obtain the rotating speed difference of output shaft of gear-box and the relative speed variation of output shaft of gear-box；According to the rotating speed difference and the relative speed variation, the estimated time is determined；Judge whether the estimated time is greater than preset lag time；If the estimated time is not more than the lag time, shifted gears according to shift request；If the estimated time is greater than the lag time, the current speed of vehicle is obtained；Judge whether the speed is less than preset shifting points speed；If the speed is less than the shifting points speed, current gear is maintained；If the speed is not less than the shifting points speed, the wheel end torque of vehicle is obtained, judges whether to request to shift gears according to the shift based on wheel end torque.Present invention introduces lag times to require as decision condition and wheel end torque as upshift limitation, can fulfil shift process ahead of schedule, improve smooth gear shifting.
Description
Technical field
The present invention relates to automotive power technical field, in particular to a kind of vehicle shift method, device and equipment.
Background technique
With the exhaustion of traditional energy, new energy application is universal, especially in automobile industry, perhaps great automaker
Hybrid power is selected to replace traditional fuel system, technical ability saves fuel, reduces the consumption of the energy, and can guarantee the continuous of automobile
Boat ability.
Existing hybrid power system can be main propelling machinery by internal combustion engine and motor is auxiliary propulsion plant driving.Root
The mixed dynamic scheme of single motor can be divided into five major class by the position according to motor relative to conventional power system, respectively with P0, P1, P2,
P3 and P4.
Wherein, motor is equipped at least one accumulator, for example, the electrochemical energy accumulator and control for storing electric energy are single
Member is to control flowing of the electric energy between accumulator and motor.Motor therefore can the operating conditions based on vehicle alternately as
Motor and generator operation.When vehicle braking, motor generates the electric energy being stored in accumulator.The electric energy stored can be with
It being later used to promote vehicle, self shifter process is usually directed to control dynamical system, so that internal combustion engine keeps optimal engine speed,
That is target engine speed.If engine speed is too high, executes upshift and therefore engine speed reduces.Similarly,
If engine speed is too low, executes downshift and engine speed increases.Optimal engine speed can be based on expectations
Fuel consumption, performance or similar situation determine.Engine speed influences fuel consumption, and therefore, it is desirable to keep engine speed to the greatest extent may be used
Can be low, while keeping driver requested driving torque.
Common hybrid power system is P2 and P3 system, but in P2 system when motor-driven vehicle, and can not be same
Shi Huishou electric energy, there are bottlenecks in efficiency；Motor must be connected with axle in P3 system, therefore motor is not used to starting hair
Motivation, motor can not be integrated with gearbox or engine, need to occupy additional volume.Therefore a kind of P2.5 system is developed
System, can be in conjunction with P2 system and P3 system the advantages of, the shortcomings that avoiding P2 system and P3 system.
Motor-car is mixed in P2.5 system and uses 7DCTH speed changer, and motor is integrated on two axis of speed changer, passes through motor band
Dynamic vehicle traveling.When upshifing in the pure electrician's condition driving process of vehicle, have the following problems: (1) motor speed is too high, and maximum can
To reach 11000rpm or more, two axis of gearbox in connection and clutch rotational speed are too high, and the maximum allowable input of clutch
Revolving speed is in 6500rpm or so, then needing to consider the hardware protection to motor, clutch, by way of upshifing in advance, reduces
Motor and clutch rotational speed；(2) it steps on the gas under accelerating mode continuously, motor speed responds quickly, and coaxial by hardware limitation
Shift needs certain shift time, and shifting up operation has been easy shift shock.
In order to solve problem above, it needs to research and develop a kind of new process for gear in P2.5 system, can guarantee that automobile exists
Under pure electricity driving cycle, the hardware such as clutch or motor are protected, while improving the ride comfort of automobile gear shift.
Summary of the invention
In view of the above problems in the prior art, the purpose of the present invention is to provide a kind of hybrid electric vehicle process for gear, dress
It sets and equipment, the requirement that introducing lag time limits upshift as decision condition and introducing wheel end torque can be realized in advance
Upshift completes shift process, improves the ride comfort of shift.
To solve the above-mentioned problems, the present invention provides a kind of vehicle shift method, comprising:
When receiving shift request, the rotating speed difference of output shaft of gear-box and the rotation speed change of output shaft of gear-box are obtained
Rate；
According to the rotating speed difference and the relative speed variation, the estimated time is determined；
Judge whether the estimated time is greater than preset lag time；
If the estimated time is not more than the lag time, shifted gears according to shift request；
If the estimated time is greater than the lag time, the current speed of vehicle is obtained；
Judge whether the speed is less than preset shifting points speed；
If the speed is less than the shifting points speed, current gear is maintained；
If the speed is not less than the shifting points speed, the wheel end torque of vehicle is obtained, is based on wheel end torque
Judge whether to request to shift gears according to the shift.
Further, the rotating speed difference includes:
Obtain the overdriven rev limit value of output shaft of gear-box and the current revolving speed of output shaft of gear-box；
According to the rev limit value and the revolving speed, the rotating speed difference of output shaft of gear-box is determined.
Further, the rev limit value includes:
Obtain current motor speed；
According to the transmission ratio of gearbox and the motor speed, the maximum (top) speed of output shaft of gear-box is determined；
It is defeated as gearbox to choose the slow-speed of revolution value of maximum (top) speed that the maximum (top) speed and clutch allow between the two
The overdriven rev limit value of shaft.
Further, the revolving speed includes:
Obtain the speed；
According to the transmission ratio of the speed and transmission system, the current revolving speed of output shaft of gear-box is determined.
Further, the relative speed variation includes:
It obtains the revolving speed and is spaced the revolving speed of preset time；
According to the revolving speed of the revolving speed and the interval preset time, the relative speed variation of output shaft of gear-box is determined.
Further, the estimated time is calculated by the rotating speed difference and the relative speed variation and is obtained, described pre-
Estimate the time to estimate for characterizing when front gear box executes the time of shift request.
Further, wheel end torque judgement includes:
Judge to take turns whether end torque is greater than the peak torque that setting allows to shift gears；
If the wheel end torque is not more than the peak torque, shifted gears according to shift request；
If the wheel end torque is greater than the peak torque, current gear is maintained.
Another aspect of the present invention also protects a kind of vehicle shift device, comprising:
Information acquisition unit, for obtaining the rotating speed difference and speed change of output shaft of gear-box when receiving shift request
The relative speed variation of case output shaft；
Time determination unit, for determining the estimated time according to the rotating speed difference and the relative speed variation；
First judging unit, for judging whether the estimated time is greater than preset lag time；
First execution unit, for the estimated time be not more than the lag time, according to it is described shift request into
Row shift；
Second execution unit then obtains the current speed of vehicle for being greater than the lag time in the estimated time；
Second judgment unit, for judging whether the speed is less than preset shifting points speed；
Third execution unit maintains current gear for being less than the shifting points speed in the speed；
4th execution unit obtains the wheel end torque of vehicle, base for being not less than the shifting points speed in the speed
In the wheel end, torque judges whether to request to shift gears according to the shift.
Another aspect of the present invention also protects a kind of vehicle shift equipment, comprising: data acquisition device, electric machine controller,
Gearbox control and clutch controller；
The data acquisition device, for acquiring current vehicle speed and current motor revolving speed；
The gearbox control, for determining the rotating speed difference of output shaft of gear-box and the revolving speed change of output shaft of gear-box
Rate；
The gearbox control, for being become according to the rotating speed difference of output shaft of gear-box and the revolving speed of output shaft of gear-box
Rate determines the estimated time；
The gearbox control, for judging whether the estimated time is greater than preset lag time；If described pre-
The time is estimated no more than the lag time, is shifted gears according to shift request；If the estimated time is greater than the sluggishness
Time then obtains the current speed of vehicle；
The gearbox control, for judging whether the speed is less than preset shifting points speed；
If the speed is less than the shifting points speed, current gear is maintained；If the speed is not less than the shifting points
Speed then obtains the wheel end torque of vehicle, judges whether to request to shift gears according to the shift based on wheel end torque.
Due to above-mentioned technical proposal, the invention has the following advantages:
1) a kind of vehicle shift method, device and equipment of the invention introduces lag time as decision condition, Neng Gouti
Preceding realization upshift, is fulfiled ahead of schedule the response time of the execution of hardware, realizes shift process, protection power train hardware (clutch or
Motor).
2) a kind of vehicle shift method, device and equipment of the invention introduces requirement of the wheel end torque to upshift limitation, when
Wheel end torque does not allow upshift when being more than a threshold value, improves the ride comfort of shift.
Detailed description of the invention
It, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of technical solution of the present invention
The attached drawing used is briefly described.It should be evident that drawings in the following description are only some embodiments of the invention, it is right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Its attached drawing.
Fig. 1 is the flow chart of vehicle shift method provided in an embodiment of the present invention；
Fig. 2 is the flow chart provided in an embodiment of the present invention for obtaining wheel end torque；
Fig. 3 is the structure chart of vehicle shift device provided in an embodiment of the present invention；
Fig. 4 is the structure chart of the information acquisition unit provided in an embodiment of the present invention；
Fig. 5 is the structure chart of the 4th execution unit provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without making creative work it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
" one embodiment " or " embodiment " referred to herein, which refers to, may be included at least one implementation of the invention
A particular feature, structure, or characteristic.In the description of the present invention, it is to be understood that, term " on ", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "top", "bottom" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of retouching
It states the present invention and simplifies description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for retouching
Purpose is stated, relative importance is not understood to indicate or imply or implicitly indicates the quantity of indicated technical characteristic.By
This defines " first ", the feature of " second " can be expressed or what is implied includes one or more of the features.Moreover,
Term " first ", " second " etc. are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It answers
The data that the understanding uses in this way are interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein can be to remove
Sequence other than those of illustrating or describe herein is implemented.
Embodiment one
The present embodiment one provides a kind of vehicle shift method, referring to figs. 1 and 2, comprising:
S101. when receiving shift request, the rotating speed difference of output shaft of gear-box and turning for output shaft of gear-box are obtained
Fast change rate.
Specifically, the rotating speed difference includes:
Obtain the overdriven rev limit value of output shaft of gear-box and the current revolving speed of output shaft of gear-box；
According to the rev limit value and the revolving speed, the rotating speed difference of output shaft of gear-box is determined.
Further, the overdriven rev limit value of the output shaft of gear-box and the output shaft of gear-box is current
The difference of revolving speed is the rotating speed difference of output shaft of gear-box.
Further, the rev limit value includes:
Obtain current motor speed；
According to the transmission ratio of gearbox and the motor speed, the maximum (top) speed of output shaft of gear-box is determined；
It is defeated as gearbox to choose the slow-speed of revolution value of maximum (top) speed that the maximum (top) speed and clutch allow between the two
The overdriven rev limit value of shaft.
Further, the current revolving speed of the output shaft of gear-box includes:
Obtain the current speed of vehicle；
According to the transmission ratio of the running speed and transmission system, the current revolving speed of output shaft of gear-box is determined.
Specifically, the relative speed variation includes:
Obtain the current rotating speed of output shaft of gear-box and the revolving speed of interval preset time；
According to the revolving speed of the current rotating speed of the output shaft of gear-box and the interval preset time, determine that gearbox exports
The relative speed variation of axis.
Further, the interval preset time is 1s.
S102. according to the rotating speed difference and the relative speed variation, the estimated time is determined；
Further, the estimated time is calculated by the rotating speed difference and the relative speed variation and is obtained, described pre-
Estimate the time to estimate for characterizing when front gear box executes the time of shift request.
S103. judge whether the estimated time is greater than preset lag time；
If the estimated time is not more than the lag time, shifted gears according to shift request；
If the estimated time is greater than the lag time, the current vehicle speed of vehicle is obtained；
Further, the lag time is used to characterize the response time that gearbox executes shift request, when described sluggish
Between be 2s-4s.
S104. judge whether the speed is less than preset shifting points speed；
If the speed is less than the shifting points speed, current gear is maintained；
If the speed is not less than the shifting points speed, the wheel end torque of vehicle is obtained, is based on wheel end torque
Judge whether to request to shift gears according to the shift.
As shown in Fig. 2, wheel end torque includes:
S201. the speed and gas pedal opening degree are obtained；
S202. according to the speed and the opening degree, driving force is determined；
S203. according to the driving force and rolling radius, wheel end torque is determined.
Further, wheel end torque judgement includes:
S204. judge to take turns whether end torque is greater than the default peak torque for allowing to shift gears；
If the wheel end torque is not more than the peak torque, shifted gears according to shift request；
If the wheel end torque is greater than the peak torque, current gear is maintained.
Further, the peak torque that the gearbox allows is 300Nm.
The present embodiment one provides a kind of vehicle shift method, introduces lag time as decision condition and introduces wheel end torque
Requirement to upshift limitation can realize upshift in advance, complete shift process, protect power train hardware (clutch or motor).
Embodiment two
The present embodiment two provides a kind of vehicle shift device, as shown in Figure 3, comprising:
Information acquisition unit 300, for obtaining the rotating speed difference and change of output shaft of gear-box when receiving shift request
The relative speed variation of fast case output shaft；
Time determination unit 400, for determining the estimated time according to the rotating speed difference and the relative speed variation；
First judging unit 500, for judging whether the estimated time is greater than preset lag time；
First execution unit 600, for being asked according to the shift when the estimated time being not more than the lag time
It asks and shifts gears；
Second execution unit 700 then obtains the current vehicle of vehicle for being greater than the lag time in the estimated time
Speed；
Second judgment unit 800, for judging whether the speed is less than preset shifting points speed；
Third execution unit 900 maintains current gear for being less than the shifting points speed in the speed；
4th execution unit 1000, for being not less than the shifting points speed in the speed, the wheel end for obtaining vehicle is turned round
Square judges whether to request to shift gears according to the shift based on wheel end torque.
As shown in figure 4, the information acquisition unit 300 includes:
Rev limit value determining module 301, for determining the rev limit value of output shaft of gear-box；
Output shaft revolving speed obtains module 302, when for obtaining the current revolving speed of output shaft of gear-box and/or default interval
Between；
Motor speed obtains module 303, for obtaining current motor revolving speed；
Running speed obtains module 304, for obtaining current driving speed；
Module 305 is chosen, both maximum (top) speeds that the maximum (top) speed and clutch for choosing output shaft of gear-box allow
Between slow-speed of revolution value as the overdriven rev limit value of output shaft of gear-box.
As shown in figure 5, the 4th execution unit 1000 includes:
Opening degree obtains module 1001, for obtaining the opening degree of gas pedal；
End torque determination module 1002 is taken turns, for determining the wheel end torque of current driving speed；
Third judgment module 1003, for taking turns whether end torque is greater than torque limit；
5th execution module 1004, for being not more than the torque limit in the wheel end torque, according to the shift
Request is shifted gears；
6th execution module 1005 maintains current gear for being greater than the torque limit in the wheel end torque.
Further, the motor speed obtains module 303 and obtains current motor revolving speed, according to the transmission ratio of gearbox and
The current motor revolving speed, determines the maximum (top) speed of output shaft of gear-box；The module 305 of choosing chooses output shaft of gear-box
The slow-speed of revolution value of the maximum (top) speed that maximum (top) speed and clutch allow between the two is as overdriven turn of output shaft of gear-box
Fast limiting value.
Further, the running speed obtains module 304 and obtains current driving speed, according to the running speed and biography
Dynamic drive system ratio, is divided by by the running speed and the transmission system transmission ratio, determines current output shaft of gear-box
Current rotating speed.
Further, the rev limit value determining module 301 obtains the rev limit value of output shaft of gear-box, according to institute
Rev limit value and the current rotating speed are stated, by the difference of the rev limit value and the current rotating speed, determines gearbox
The rotating speed difference of output shaft.
Further, the output shaft revolving speed obtains the current rotating speed and/or regulation that 302 modules obtain output shaft of gear-box
The revolving speed in period determines the relative speed variation of output shaft of gear-box according to the revolving speed of the current rotating speed and the specified period.
Further, the information acquisition unit 300 obtains the rotating speed difference and output shaft of gear-box of output shaft of gear-box
Relative speed variation；The time determination unit 400 passes through the revolving speed according to the rotating speed difference and the relative speed variation
Difference and the relative speed variation are divided by, and determine the estimated time；First judging unit 500 judges whether the estimated time is greater than
Preset lag time, first execution unit 600 is when the estimated time being not more than the lag time, according to described
Shift request is shifted gears；Second execution unit 700 is greater than the lag time in the estimated time, then it is current to obtain vehicle
Speed；The second judgment unit 800, for judging whether the speed is less than preset shifting points speed；The third
Execution unit 900 maintains current gear for being less than the shifting points speed in the speed；4th execution unit
1000 are not less than the shifting points speed in the speed, obtain the wheel end torque of vehicle, are based on wheel end torque judgement
It is no to be shifted gears according to shift request.
Further, the third judgment module 1003 takes turns whether end torque is greater than torque limit, and the described 5th executes
Module 1004 is greater than torque limit in wheel end torque, is shifted gears according to shift request；6th execution module
1005 are not more than torque limit in wheel end torque, maintain current gear.
Further, the opening degree obtains the opening degree that module 1001 obtains gas pedal, and the running speed obtains
Module 304 obtains current driving speed and determines driving force according to the opening degree and the running speed；Wheel end torque
Determining module 1002 is used to determine the wheel end torque of current driving speed according to the driving force and rolling radius.
The present embodiment two provides a kind of vehicle shift device, introduces lag time as decision condition and introduces wheel end torque
Requirement to upshift limitation can realize upshift in advance, complete shift process, protect power train hardware (clutch or motor).
Embodiment three
The present embodiment three provides a kind of equipment of vehicle shift, comprising: data acquisition device, electric machine controller, gearbox
Controller and clutch controller；
The data acquisition device works as the current speed of vehicle and current motor speed for acquiring；
The gearbox control, for determining the rotating speed difference of output shaft of gear-box and the revolving speed change of output shaft of gear-box
Rate；
The gearbox control, for being become according to the rotating speed difference of output shaft of gear-box and the revolving speed of output shaft of gear-box
Rate determines the estimated time；
The gearbox control, for judging whether the estimated time is greater than preset lag time；If described pre-
The time is estimated no more than the lag time, is shifted gears according to shift request；If the estimated time is greater than the sluggishness
Time then obtains the wheel end torque of vehicle, judges whether to request to shift gears according to the shift based on wheel end torque.
Specifically, the electric machine controller, for controlling current motor revolving speed；The clutch controller, for control from
The maximum (top) speed that clutch allows.
Specifically, the equipment of the vehicle shift is based on above-mentioned vehicle shift device, is changed according to shift request
Gear.
The present embodiment three provides a kind of equipment of vehicle shift, introduces lag time as decision condition and introduces the torsion of wheel end
Requirement of the square to upshift limitation, can realize upshift in advance, complete shift process, improve the ride comfort of shift.
It should be noted that for the various method embodiments described above, describing for simplicity, it is all expressed as to two series
Combination of actions, but those skilled in the art should understand that, the present invention is not limited by the sequence of acts described, because according to
According to the present invention, certain steps can use other sequences or carry out simultaneously.Similarly, each module in above-mentioned device processed refers to
Computer program or program segment, for executing certain one or more specific function, in addition, the differentiation of above-mentioned each module is not
It must be separated for representing actual program code also.In addition, also any combination can be carried out to above-described embodiment, others are obtained
Embodiment.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the part being described in detail in certain each embodiment,
It may refer to the associated description of other embodiments.Those skilled in the art will also be appreciated that the embodiment of the present invention is listed various
Illustrative components, blocks (illustrative logical block), unit and step can be soft by electronic hardware, computer
Part, or both combination realized.For the replaceability (interchangeability) for clearly showing that hardware and software, on
The various illustrative components (illustrative components) stated, unit and step universally describe theirs
Function.Such function is that the design requirement for depending on specific application and whole system is realized by hardware or software.
Those skilled in the art can be used various methods and realize the function, but this reality for every kind of specific application
Now it is understood not to the range beyond protection of the embodiment of the present invention.
Above description sufficiently discloses a specific embodiment of the invention.It should be pointed out that being familiar with the field
Range of any change that technical staff does a specific embodiment of the invention all without departing from claims of the present invention.
Correspondingly, the scope of the claims of the invention is also not limited only to previous embodiment.
Claims (10)
1. a kind of vehicle shift method characterized by comprising
When receiving shift request, the rotating speed difference of output shaft of gear-box and the relative speed variation of output shaft of gear-box are obtained；
According to the rotating speed difference and the relative speed variation, the estimated time is determined；
Judge whether the estimated time is greater than preset lag time；
If the estimated time is not more than the lag time, shifted gears according to shift request；
If the estimated time is greater than the lag time, the current speed of vehicle is obtained；
Judge whether the speed is less than preset shifting points speed；
If the speed is less than the shifting points speed, current gear is maintained；
If the speed is not less than the shifting points speed, the wheel end torque of vehicle is obtained, is judged based on the wheel end torque
Whether shifted gears according to shift request.
2. a kind of vehicle shift method according to claim 1, the rotating speed difference include:
Obtain the overdriven rev limit value of output shaft of gear-box and the current revolving speed of output shaft of gear-box；
According to the rev limit value and the revolving speed, the rotating speed difference of output shaft of gear-box is determined.
3. a kind of vehicle shift method according to claim 2, which is characterized in that the rev limit value includes:
Obtain current motor speed；
According to the transmission ratio of gearbox and the motor speed, the maximum (top) speed of output shaft of gear-box is determined；
The slow-speed of revolution value of maximum (top) speed that the maximum (top) speed and clutch allow between the two is chosen as output shaft of gear-box
Overdriven rev limit value.
4. a kind of vehicle shift method according to claim 2, which is characterized in that the revolving speed includes:
Obtain the speed；
According to the transmission ratio of the speed and transmission system, the current revolving speed of output shaft of gear-box is determined.
5. a kind of vehicle shift method according to claim 1, which is characterized in that the relative speed variation includes:
It obtains the revolving speed and is spaced the revolving speed of preset time；
According to the revolving speed of the revolving speed and the interval preset time, the relative speed variation of output shaft of gear-box is determined.
6. a kind of vehicle shift method according to claim 1, which is characterized in that the estimated time passes through the revolving speed
Difference and the relative speed variation, which calculate, to be obtained, and the estimated time needs for characterizing when front gear box executes the shift request
The time of consumption.
7. a kind of vehicle shift method according to claim 1, which is characterized in that wheel end torque judgement includes:
Judge to take turns whether end torque is greater than the peak torque that setting allows to shift gears；
If the wheel end torque is not more than the peak torque, shifted gears according to shift request；
If the wheel end torque is greater than the peak torque, current gear is maintained.
8. a kind of vehicle shift method according to claim 1, which is characterized in that the lag time is for characterizing speed change
Case executes the response time of shift request.
9. a kind of vehicle shift device characterized by comprising
Information acquisition unit, for when receiving shift request, rotating speed difference and the gearbox for obtaining output shaft of gear-box to be defeated
The relative speed variation of shaft；
Time determination unit, for determining the estimated time according to the rotating speed difference and the relative speed variation；
First judging unit, for judging whether the estimated time is greater than preset lag time；
First execution unit is changed for being not more than the lag time in the estimated time according to shift request
Gear；
Second execution unit then obtains the current speed of vehicle for being greater than the lag time in the estimated time；
Second judgment unit, for judging whether the speed is less than preset shifting points speed；
Third execution unit maintains current gear for being less than the shifting points speed in the speed；
4th execution unit obtains the wheel end torque of vehicle, is based on institute for being not less than the shifting points speed in the speed
Wheel end torque is stated to judge whether to request to shift gears according to the shift.
10. a kind of vehicle shift equipment characterized by comprising data acquisition device, electric machine controller, gearbox control
And clutch controller；
The data acquisition device, for acquiring current vehicle speed and current motor revolving speed；
The gearbox control, for determining the rotating speed difference of output shaft of gear-box and the rotation speed change of output shaft of gear-box
Rate；
The gearbox control, for according to the rotating speed difference of output shaft of gear-box and the rotation speed change of output shaft of gear-box
Rate determines the estimated time；
The gearbox control, for judging whether the estimated time is greater than preset lag time；If described when estimating
Between be not more than the lag time, according to the shift request shift gears；If the estimated time is greater than the lag time,
Then obtain the current speed of vehicle；
The gearbox control, for judging whether the current vehicle speed is less than preset shifting points speed；If the speed
Less than the shifting points speed, current gear is maintained；If the speed is not less than the shifting points speed, the wheel of vehicle is obtained
Torque is held, judges whether to request to shift gears according to the shift based on wheel end torque.
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| CN201910312588.7A CN110067853B (en) | 2019-04-18 | 2019-04-18 | Vehicle gear shifting method, device and equipment |
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| CN201910312588.7A CN110067853B (en) | 2019-04-18 | 2019-04-18 | Vehicle gear shifting method, device and equipment |
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