CN109896471A - A kind of fluid drive method and system - Google Patents
A kind of fluid drive method and system Download PDFInfo
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- CN109896471A CN109896471A CN201910271254.XA CN201910271254A CN109896471A CN 109896471 A CN109896471 A CN 109896471A CN 201910271254 A CN201910271254 A CN 201910271254A CN 109896471 A CN109896471 A CN 109896471A
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Abstract
The invention discloses a kind of fluid drive methods, applied in the vehicle control device for carrying electrichydraulic control gearbox, comprising: obtain car speed and acceleration；When vehicle meets fluid drive condition, fluid drive process is executed；When being greater than 0 in the first moment vehicle acceleration, and car speed is all larger than gear shift high speed value Vmax in the first duration of the first moment before this, and automobile gear level is in when non-most high-grade in gear may be selected, and vehicle upshifts at the first moment；When in the second moment vehicle acceleration, less than 0, and the second moment, car speed was respectively less than gear shift low speed value Vmin in the second duration before this, and automobile gear level is in the not least shelves that gear may be selected, vehicle is downshifted at the second moment.Using the scheme of the application, frequent lifting shelves are avoided, the usage experience of driver is improved, are conducive to protect gearbox, is also conducive to vehicle stabilization and runs.Present invention also provides a kind of automatic gear-shifting systems, have corresponding effect.
Description
Technical field
The present invention relates to technical field of vehicle control, more particularly to a kind of fluid drive method and system.
Background technique
What internal combustion Counterbalanced forklift usually carried is electrichydraulic control gearbox, and when carrying out speed change, there are two types of modes, a kind of
It is to realize speed change by hand shift, i.e., is changed by the gear-shifting solenoid valve that gearbox gear-shift handle directly controls gearbox
Shelves, another kind are to realize speed change by fluid drive, and staff can rule of thumb set fluid drive point on the controller, control
Device processed realizes the automatic control of lifting shelves by the way that the real-time speed of vehicle to be compared with the fluid drive point.
Since hand shift mode is complicated for operation, and safety is poor, and driver is easy to appear maloperation, such as does not make
Dynamic parking causes Gearbox Fault with regard to reversed gear shift, thus it is usually used be fluid drive mode.But due to existing
The real-time speed of vehicle is only simply compared by scheme with the fluid drive of setting point, so that intelligence degree is low, is held
The case where easily causing meaningless buty shifting.For example, can cause when speed is just near fluid drive point frequent
Shelves are gone up and down, the usage experience of driver is reduced, is also unfavorable for the stable operation of vehicle, furthermore frequent gear shift is also easily damaged change
Fast case.For another example, although speed is higher than fluid drive point, speed is in the process constantly reduced, that is to say, that carries out upshifing it
The time for maintaining the gear afterwards is not grown, and can downshift again.
In conclusion the case where how designing a kind of fluid drive method, avoiding the occurrence of frequently lifting shelves, is current ability
Field technique personnel technical problem urgently to be solved.
Summary of the invention
The object of the present invention is to provide a kind of fluid drive method and systems, to avoid the feelings for being frequent lifting shelves
Condition.
In order to solve the above technical problems, the invention provides the following technical scheme:
A kind of fluid drive method, applied to carry electrichydraulic control gearbox vehicle controller in, comprising:
Obtain car speed and vehicle acceleration；
When judging that vehicle meets the condition of fluid drive, fluid drive process is executed；
When executing the fluid drive process, when the vehicle acceleration described in the first moment be greater than 0, and it is described first when
It carves the car speed in default first duration before this and is all larger than gear shift high speed value Vmax, and automobile gear level is in and shelves may be selected
Position in it is non-most high-grade when, then vehicle is upshiftd at first moment；
When the vehicle acceleration described in the second moment is less than 0, and institute in default second duration of second moment before this
It states car speed and is respectively less than gear shift low speed value Vmin, and when not least shelves of the automobile gear level in optional gear, then described
Second moment downshifted vehicle；
Wherein, first moment and second moment be execute the fluid drive process when it is any when
It carves.
Preferably, after the execution fluid drive process, further includes:
When receiving demarcation signal, in section [V0-a,V0+ b] in select n data；V0For preset initial value, a
It is parameter preset with b, n is positive integer and n >=2；
For each data selected, using the data as gear shift high speed value Vmax, and performed once in vehicle
When upshift, acceleration average value when this time upshift is calculated, and switch to next data selected after calculating finishes
As gear shift high speed value Vmax；
After calculating n acceleration average value, by corresponding to the minimum value of n acceleration average value from section
[V0-a,V0+ b] in the data that select, as the gear shift high speed value Vmax finally determined.
Preferably, it is described by corresponding to the minimum value of n acceleration average value from section [V0-a,V0+ b] in choose
Data out, after the gear shift high speed value Vmax finally determined, further includes:
Gear shift low speed value Vmin is determined according to the gear shift high speed value Vmax finally determined.
Preferably, the gear shift high speed value Vmax that the basis finally determines determines gear shift low speed value Vmin, comprising:
The half for the gear shift high speed value Vmax that will eventually determine out is determined as gear shift low speed value Vmin.
Preferably, described in section [V0-a,V0+ b] in select n data, comprising:
In section [V0-a,V0+ b] in select n data；Wherein, the value of i-th of data is1≤i≤n。
Preferably, the condition judged vehicle and meet fluid drive, comprising:
Parking brake signals are not being received, and are receiving automatic mode signal, and gear selection information is not least shelves
When position, judge that vehicle meets the condition of fluid drive.
Preferably, further includes:
Obtain the working connection pressure of the vehicle；
When the working connection pressure is not in preset working connection pressure limit, pressure controls the vehicle and is in low or first gear
Position.
Preferably, further includes:
Obtain one grade of solenoid valve pressure of advance of the vehicle and two grades of solenoid valve pressure of advance of the vehicle；
When the automobile gear level is to advance one grade, and detect one grade of solenoid valve pressure of the advance not preset first
When pressure limit, force to control the vehicle and be in advance one grade；
When the automobile gear level is to advance two grades, and detect two grades of solenoid valve pressure of the advance not preset second
When pressure limit, force to control the vehicle and be in advance one grade.
Preferably, further includes:
Obtain one grade of solenoid valve pressure of retrogressing of the vehicle；
When the automobile gear level is to retreat one grade, and detect one grade of solenoid valve pressure of the retrogressing not in preset third
When pressure limit, force to control the vehicle in one grade of retrogressing.
A kind of automatic shift system, applied to carry electrichydraulic control gearbox vehicle controller in, comprising:
Parameter acquisition module, for obtaining car speed and vehicle acceleration；
Fluid drive process triggers module, for executing and moving certainly when judging that vehicle meets the condition of fluid drive
Shelves process；
Upshift module, for being greater than 0 when the vehicle acceleration described in the first moment, and first moment before this default
The car speed is all larger than gear shift high speed value Vmax in first duration, and automobile gear level is in the non-highest that may be selected in gear
When shelves, then vehicle is upshiftd at first moment；
Downshift module, for when the vehicle acceleration described in the second moment is less than 0, and second moment before this default
The car speed is respectively less than gear shift low speed value Vmin in second duration, and automobile gear level is in the not least shelves that gear may be selected
When, then vehicle is downshifted at second moment；
Wherein, first moment and second moment be execute the fluid drive process when it is any when
It carves.
Controller using the provided technical solution of the embodiment of the present invention, applied to the vehicle for carrying electrichydraulic control gearbox
In, the available car speed of controller and vehicle acceleration, and when judging that vehicle meets the condition of fluid drive,
Execute fluid drive process.When carrying out fluid drive, the application is provided with gear shift high speed value Vmax and gear shift low speed value
Vmin, avoid be arranged in the prior art it is frequent when speed caused by single fluid drive point is near fluid drive point
The case where going up and down shelves.Further, the application has also combined vehicle acceleration and judges, specifically, the first moment vehicle adds
Speed is greater than 0, and when car speed is all larger than gear shift high speed value Vmax in default first duration of the first moment before this, and vehicle
Gear be in may be selected gear in it is non-most high-grade when, vehicle can just be upshiftd at the first moment.Even if can be seen that speed compared with
Height, but if vehicle is slowing down at this time, it is assumed that the also maximum probability that upshiftd can be needed due to the reduction of speed in a short time
It downshifts, meaning also is had no with regard to this time upshift and downshift operation, be also easy to damage gearbox.Therefore the application in this case
Without upshift.And the first moment vehicle acceleration is greater than 0, illustrates that speed is on the rise, after being upshiftd, usually will not
Appearance needs the case where downshifting immediately.The trigger condition of downshift is referred to upshift.Since the scheme of the application avoids frequently
Lifting shelves, improve the usage experience of driver, be conducive to protect gearbox, be also beneficial to the stable operation of vehicle.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of implementation flow chart of fluid drive method in the present invention；
Fig. 2 is the circuit diagram in a kind of specific embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of automatic shift system in the present invention.
Specific embodiment
Core of the invention is to provide a kind of fluid drive method, avoids frequent lifting shelves, improves driver's
Usage experience is conducive to protect gearbox, is also beneficial to the stable operation of vehicle.
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiments are only a part of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of implementation flow chart of fluid drive method in the present invention, this method is applied to carry
In the controller of the vehicle of electrichydraulic control gearbox, comprising:
Step S101: car speed and vehicle acceleration are obtained.
Controller can obtain car speed by vehicle speed sensor, obtain vehicle acceleration by acceleration transducer.
It is also possible to after controller obtains car speed, calculates vehicle acceleration.But usually, it is contemplated that calculate acceleration
It will increase the burden of controller, therefore acceleration transducer would generally be used to examine according to the setting period to vehicle acceleration
It surveys, and is sent to controller.
Fig. 2 is the circuit diagram in a kind of specific embodiment, the signal end of vehicle speed sensor G1 and the vehicle of controller
Fast signal pins connection, the power end of vehicle speed sensor G1 and the probe power pin of controller connect, and controller is to speed
When sensor G1 is powered, voltage can also can according to need in other occasions certainly for 5V and be set and be adjusted.
The signal end of acceleration transducer G2 and the acceleration signal pin of controller connect, to send the vehicle detected to controller
Acceleration, the power end of acceleration transducer G2 connects with the anode of battery B, i.e., are acceleration transducer by battery B
G2 is powered.
Step S102: when judging that vehicle meets the condition of fluid drive, fluid drive process is executed.
Controller can judge whether vehicle meets the condition of fluid drive by the level state of relevant pins, if symbol
It closes, then controller can execute fluid drive process.
The trigger condition of fluid drive process can be set and be adjusted according to the actual situation, usually can be according to actually answering
In, the priority of vehicle different mode is set.Such as in a specific embodiment, vehicle is judged in step S102
Meet the condition of fluid drive, it can be with specifically: parking brake signals are not being received, and receive automatic mode signal,
And gear selection information be not least gear when, judge that vehicle meets the condition of fluid drive.
Controller can periodically judge whether to receive parking brake signals, if receiving parking brake signals,
The driving of gearbox gear-shift control solenoid valve can be then cut off, and if a determination be made that not receiving parking brake signals, then
Subsequent judgement can be executed.Parking brake signals can be in electric signal, such as the embodiment of Fig. 2, as key switch S1
And after parking braking pressure switch S4 is closed, this pin of the parking braking mode of controller can receive high electricity
Ordinary mail number, i.e., controller at this time have received parking brake signals.
Controller is judged not receive after parking brake signals, it can be determined that automatic mode signal whether is received,
If it is judged that not receiving automatic mode signal, then controller can enter hand shift program, and if it is judged that receiving
Automatic mode signal is arrived, controller can continue to judge whether gear selection information is lowest gear.Such as the embodiment party of Fig. 2
In formula, when key switch S1 be closed, when parking braking pressure switch S4 and automatic mode switch S3 are disconnected, controller oneself
This pin of dynamic model formula can receive low level signal, i.e., the judging result of controller at this time is not receive automatic mold
Formula signal, correspondingly, key switch S1 is closed, parking braking pressure switch S4 is disconnected, when automatic mode switch S3 is closed, control
The judging result of device is to have received automatic mode signal.
Controller judging not receive parking brake signals, and after receiving automatic mode signal, when continuing to sentence
It is disconnected go out gear selection information when being lowest gear, then controller can enter hand shift program, and when judging gear selection
When information is not least gear, controller can determine that vehicle meets the condition of fluid drive, and then can execute and move certainly
Shelves process.
Such as vehicle has one grade of advance, advances two grades, advance third gear, retreats one grade and retreats two grades of this 5 gears, when
Gear selection information is one grade of advance or is when retreating one grade, then controller can determine that gear selection information is deep low gear
Position, correspondingly, when gear selection information be advance two grades, advance third gear and retreat two grades of threes in any one when, can
To determine gear selection information for not least gear.For another example, 3 gears are shared in the embodiment of Fig. 2, as gear shifting handle S5
In F2 closure, when F1 and R1 are disconnected, this pin of the drive shift of controller is high level, and controller determines that gear selection is believed
Breath is one grade of advance.When F1 is closed, and F2 and R1 are disconnected, the drive shift pin of controller and to switch at high speed pin be height
Level, controller determines that gear selection information is to advance two grades, when R1 is closed, and F2 and F1 are disconnected, the reverse drive gear of controller
Pin is high level, and controller determines gear selection information to retreat one grade.
In automatic mode, what gear selection information determined is the optional gear of vehicle, such as when the gear of vehicle selects
Selecting information is when advancing two grades, and in automatic mode, controller can be according to gear shift trigger condition, to automobile gear level in advance one
It is switched over automatically between two grades of shelves and advance, i.e., gear selection information is when advancing two grades, and automobile gear level can be advance
One grade or two grades of advance.And when the gear selection information of vehicle is to advance one grade, due to being lowest gear, it is not present
Ascending, descending stall space would not also enter fluid drive process.Therefore, in this kind of embodiment, gear selection information be it is non-most
When low-grade location, it just can determine whether that vehicle meets the condition of fluid drive.
Step S103: when executing fluid drive process, when being greater than 0 in the first moment vehicle acceleration, and the first moment
Car speed is all larger than gear shift high speed value Vmax in default first duration before this, and automobile gear level is in and may be selected in gear
When non-most high-grade, then vehicle is upshiftd at the first moment.
First moment can be any time when executing fluid drive process.It is greater than 0 in the first moment vehicle acceleration,
And first car speed in moment default first duration before this be all larger than gear shift high speed value Vmax, illustrate at this time car speed compared with
Height, and the higher speed at least maintains the first duration, meanwhile, the trend that speed also continues growing, as long as then vehicle
Gear be in may be selected gear in it is non-most high-grade when, controller will upshift vehicle at the first moment.
Automobile gear level, which is in, may be selected non-most high-grade in gear, and showing the gear of vehicle, there are also rooms for promotion.Such as vehicle
There is one grade of advance, advance two grades, advance third gear retreats one grade and retreats two grades of this 5 gears.When gear selection information is
Advance third gear, and after performing fluid drive process, controller, which can control, to advance one grade, advances two grades and preceding
Into the switching for carrying out automobile gear level between third gear.If the gear at the first moment is to advance two grades, right and wrong are most high-grade, then controller
Vehicle can be upshiftd at the first moment.If the gear at the first moment be advance third gear, even if speed and acceleration compared with
Height, but automobile gear level has been highest gear, naturally also can not just carry out upshifing again.
Since the application combines trigger condition of the acceleration as upshift, that is, there are also increase for and speed higher in speed
Trend under just upshift so that being usually not in the case where downshift immediately, that is to say, that reduce after upshift
In existing scheme in a short time frequently meaningless ascending, descending shelves the occurrence of probability.
First duration and the value of gear shift high speed value Vmax can according to need and set, such as by the first duration
It is set as 0.5 second.Controller can control the state of associated solenoid valve to realize that ascending, descending shelves operate, such as the embodiment of Fig. 2
In, controller can control high low-speed solenoid valve Y1, advance solenoid valve Y2 and retrogressing solenoid valve Y3, to control vehicle
Gear.
Step S104: when in the second moment vehicle acceleration less than 0, and vehicle in default second duration of the second moment before this
Speed is respectively less than gear shift low speed value Vmin, and when automobile gear level is in the not least shelves that gear may be selected, then at the second moment
Vehicle is downshifted；Wherein, the first moment and the second moment are any time when executing fluid drive process.
When automobile gear level is in the not least shelves that gear may be selected, illustrate that gear also declines space.At the second moment
In default second duration before this, car speed is respectively less than gear shift low speed value Vmin, illustrates that speed is lower, and be in lower shape
The duration of state has been at least up to the second duration, and vehicle acceleration is less than 0, illustrate speed there are also downward trend, then the application
Scheme can downshift vehicle at the second moment.Due to combining trigger condition of the acceleration as downshift, reduce short after downshifting
The probability of happening for the case where time upshifts immediately reduces the frequency of meaningless downshift operation, be conducive to the stabilization of vehicle
Operation.
Using fluid drive method provided by the embodiment of the present invention, applied to the vehicle for carrying electrichydraulic control gearbox
In controller, the available car speed of controller and vehicle acceleration, and work as and judge that vehicle meets fluid drive
When condition, fluid drive process is executed.When carrying out fluid drive, the application is provided with gear shift high speed value Vmax and gear shift is low
Fast value Vmin, avoids and is arranged when speed caused by single fluid drive point is near fluid drive point in the prior art
Frequently the case where lifting shelves.Further, the application has also combined vehicle acceleration and judges, specifically, the first moment vehicle
Acceleration is greater than 0, and when car speed is all larger than gear shift high speed value Vmax in default first duration of the first moment before this, and
Automobile gear level be in may be selected gear in it is non-most high-grade when, vehicle can just be upshiftd at the first moment.Even if can be seen that speed
Degree is higher, but if vehicle is slowing down at this time, it is assumed that the also maximum probability that upshiftd can be in a short time due to the reduction of speed
And need to downshift, meaning also is had no with regard to this time upshift and downshift operation, is also easy to damage gearbox.Therefore in this case originally
Application is without upshift.And the first moment vehicle acceleration is greater than 0, illustrates that speed is on the rise, after being upshiftd, usually
It is not in need the case where downshifting immediately.The trigger condition of downshift is referred to upshift.Since the scheme of the application avoids
Frequent lifting shelves, improve the usage experience of driver, are conducive to protect gearbox, are also beneficial to the stable operation of vehicle.
In a kind of specific embodiment of the invention, after step s 102, can with the following steps are included:
Step 1: when receiving demarcation signal, in section [V0-a,V0+ b] in select n data；V0It is preset
Initial value, a and b are parameter preset, and n is positive integer and n >=2；
Step 2: it for each data selected, using the data as gear shift high speed value Vmax, and is executed in vehicle
When primary upshift, acceleration average value when this time upshift is calculated, and switch to next select after calculating finishes
Data as gear shift high speed value Vmax；
Step 3:, will be corresponding to the minimum value of n acceleration average value after calculating n acceleration average value
From section [V0-a,V0+ b] in the data that select, as the gear shift high speed value Vmax finally determined.
In view of vehicle can encounter various road conditions in motion, preset gear shift high speed value Vmax is likely to be suited for certain
Kind of road conditions, but when road conditions change, if not adjusting the value of Vmax, degree of jolting when may will increase gear shift is reduced
The usage experience of driver.Therefore, in this kind of embodiment, controller can enter calibration mode, to gear shift high speed value Vmax
Value be adjusted.
Specifically, when controller receives demarcation signal, in section [V0-a,V0+ b] in select n data；V0It is pre-
If initial value, a and b are parameter preset, and n is positive integer and n >=2.
In the embodiment of Fig. 2, after calibration switch S2 closure, controller, which can determine, receives demarcation signal, into
Enter calibration mode.Certainly, it should be pointed out that the premise that controller enters calibration mode is that controller is in fluid drive always
Process in, namely when executing above three step, key switch S1 closure, parking braking pressure switch S4 is disconnected, automatically
Mode switch S3 closure.
V0It can be according to the comfort level of driver when engine test bench characteristic curve, gearbox torque-converters performance curve and gear shift
Etc. being set, the value of parameter preset a and parameter preset b can also be set and be adjusted according to actual needs, such as one
In kind of concrete scene, a and b are 2.5, namely from section [V0-2.5,V0+ 2.5] n data are selected in.
From section [V0-a,V0+ b] in select n data, specific selection mode, which can according to need, to be set and adjusts
It is whole, such as can be set to uniformly choose, it is simple and convenient, it is also beneficial to subsequent determine most suitable numerical value as gear shift high speed
Value Vmax.I.e., it is possible in section [V0-a,V0+ b] in select n data；Wherein, the value of i-th of data is1≤i≤n。
For each data selected, using the data as gear shift high speed value Vmax, driver needs to control vehicle
Operation in general, driver is once accelerated, then slow down so that controller triggers primary upshift under fluid drive process
It stops and is taken turns as one, controller has just carried out primary upshift and primary downshift in the wheel.It is performed in vehicle and once upshifts it
Afterwards, controller can calculate acceleration average value when this time upshifts, i.e., the acceleration average value of i-th dataWherein, α (t) is instantaneous acceleration, t1For the time started that upshifts, t2For the end time that upshifts.And consider
To for same vehicle, time-consuming when executing upshift every time is relatively fixed, therefore usually can be by t2-t1Value setting
For fixed value, such as it is set as 2 seconds.
Calculated acceleration average value kiIt is smaller, illustrate that the degree of jolting when gear shift is lower, is more conducive to improve driving
The driving experience of member.Therefore, n data are successively regard as gear shift high speed value Vmax, calculates n corresponding to this n data
After acceleration average value, by corresponding to the minimum value of n acceleration average value from section [V0-a,V0+ b] in select
Data, as the gear shift high speed value Vmax finally determined.
That is to say, in this kind of embodiment, from section [V0-a,V0+ b] in select n data, and determine one most
Suitable data are as gear shift high speed value Vmax, so that the degree of jolting when being upshiftd is minimum.
It may also be noted that under normal circumstances, driver controls vehicle and carries out n times upshift, to obtain n acceleration
Average value is spent, but in the occasion of part, if not carrying out n times upshift, such as n is 10, but driver only controls vehicle and carries out
The operation of three-wheel acceleration, deceleration, i.e., only carried out 3 upshifts, and driver just has turned off calibration switch S2, exits calibration mode.Then
Controller can judge this 3 acceleration average values, after determining minimum value, by corresponding to the minimum value from area
Between [V0-a,V0+ b] in the data that select as gear shift high speed value Vmax.
Further, it for gear shift low speed value Vmin, can also be adjusted under calibration mode, adjustment mode can
Referring to the hereinbefore associated description about gear shift high speed value Vmax.Multiple data can also be chosen, respectively by the number of selection
According to as gear shift low speed value Vmin, and when each data is as gear shift low speed value Vmin, control vehicle executes primary drop
Shelves.Finally by the corresponding acceleration average value of more each data, determine most suitable data as gear shift low speed value Vmin.
Further, it is contemplated that gear shift low speed value Vmin and gear shift high speed value Vmax have certain relevance, can also be with
Gear shift low speed value Vmin is not determined by way of test, but it is directly high according to the gear shift finally determined in above-mentioned steps three
Speed value Vmax determines gear shift low speed value Vmin, is conducive to time-consuming needed for saving determining gear shift low speed value Vmin.For example, can be with
The half for the gear shift high speed value Vmax that will eventually determine out is determined as gear shift low speed value Vmin.
In a kind of specific embodiment of the invention, further includes:
Obtain the working connection pressure of vehicle；
When working connection pressure is not in preset working connection pressure limit, pressure control vehicle is in low gear.
Working connection pressure sensor can detecte out the working connection pressure of vehicle, and then be sent to controller.In Fig. 2,
The connection of the working connection pressure pin of working connection pressure sensor G3 and controller.When controller judges working connection pressure not pre-
If working connection pressure limit when, can force control vehicle be in low gear, advantageously reduce risk.
Further, can also include:
Obtain one grade of solenoid valve pressure of advance of vehicle and two grades of solenoid valve pressure of advance of vehicle；
When automobile gear level is to advance one grade, and the one grade of solenoid valve pressure that detects to advance is not in preset first pressure range
When, it forces control vehicle to be in and advances one grade；
When automobile gear level is to advance two grades, and the two grades of solenoid valve pressure that detect to advance are not in preset second pressure range
When, it forces control vehicle to be in and advances one grade.
In this kind of embodiment, controller sentences two grades of solenoid valve pressure of one grade of solenoid valve pressure and advance of advancing
It is disconnected.When automobile gear level be advance one grade, and detect advance one grade of solenoid valve pressure not in preset first pressure range, by force
System control vehicle, which is in, to advance one grade, to reduce risk.Correspondingly, when automobile gear level is to advance two grades, and detect to advance
Two grades of solenoid valve pressure force control vehicle to be in and advance one grade not in preset second pressure range.
For retreating gear, the protection can also be executed.
Such as in a specific embodiment, further includes:
Obtain one grade of solenoid valve pressure of retrogressing of vehicle；
When automobile gear level is to retreat one grade, and detect to retreat one grade of solenoid valve pressure not in preset third pressure limit
When, it forces control vehicle to be in and retreats one grade.
First pressure range, second pressure range and third pressure limit can carry out according to actual needs setting and
Adjustment.In the embodiment of Fig. 2, controller is obtained by this pin of F1 pressure advances what one grade of pressure sensor G4 was sent
Advance one grade of solenoid valve pressure, passes through this pin of F2 pressure and obtain two grades of electricity of advance that the two grades of pressure sensor G5 that advance are sent
Magnet valve pressure obtains the one grade of solenoid valve pressure of retrogressing for retreating one grade of pressure sensor G6 and sending by this pin of R1 pressure.
In addition, f1, f2, f3 are fuse, the anode of the power supply termination battery B of controller in Fig. 2.
Corresponding to above method embodiment, the embodiment of the invention also provides a kind of automatic shift system, applied to taking
In the controller for carrying the vehicle of electrichydraulic control gearbox, shown in Figure 3, which is comprised the following modules:
Parameter acquisition module 301, for obtaining car speed and vehicle acceleration；
Fluid drive process triggers module 302, it is automatic for executing when judging that vehicle meets the condition of fluid drive
Gear shift process；
Upshift module 303, and for being greater than 0 when the vehicle acceleration described in the first moment, and first moment is before this
The car speed is all larger than gear shift high speed value Vmax in default first duration, and automobile gear level is in non-in optional gear
When most high-grade, then vehicle is upshiftd at first moment；
Downshift module 304, and for when the vehicle acceleration described in the second moment is less than 0, and second moment is before this
The car speed is respectively less than gear shift low speed value Vmin in default second duration, and automobile gear level be in may be selected gear it is non-most
When low-grade, then vehicle is downshifted at second moment；Wherein, first moment and second moment are to execute institute
State any time when fluid drive process.
Further, it can also include gear shift high speed value demarcating module, be used for:
When receiving demarcation signal, in section [V0-a,V0+ b] in select n data；V0For preset initial value, a
WithbIt is parameter preset, n is positive integer and n >=2；
For each data selected, using the data as gear shift high speed value Vmax, and performed once in vehicle
When upshift, acceleration average value when this time upshift is calculated, and switch to next data selected after calculating finishes
As gear shift high speed value Vmax；
After calculating n acceleration average value, by corresponding to the minimum value of n acceleration average value from section
[V0-a,V0+ b] in the data that select, as the gear shift high speed value Vmax finally determined.
In a kind of specific embodiment of the invention, can also include that gear shift low speed value determining module is used for: according to
The gear shift high speed value Vmax finally determined determines gear shift low speed value Vmin.
In a kind of specific embodiment of the invention, gear shift low speed value determining module can be specifically used for:
The half for the gear shift high speed value Vmax that will eventually determine out is determined as gear shift low speed value Vmin.
In a kind of specific embodiment of the invention, fluid drive process triggers module 302 is specifically used for:
Parking brake signals are not being received, and are receiving automatic mode signal, and gear selection information is not least shelves
When position, judges that vehicle meets the condition of fluid drive, execute fluid drive process.
In a kind of specific embodiment of the invention, further includes working connection pressure protection module, is used for:
Obtain the working connection pressure of the vehicle；
When the working connection pressure is not in preset working connection pressure limit, pressure controls the vehicle and is in low or first gear
Position.
In a kind of specific embodiment of the invention, further includes drive shift solenoid valve pressure protection module, is used for:
Obtain one grade of solenoid valve pressure of advance of the vehicle and two grades of solenoid valve pressure of advance of the vehicle；
When the automobile gear level is to advance one grade, and detect one grade of solenoid valve pressure of the advance not preset first
When pressure limit, force to control the vehicle and be in advance one grade；
When the automobile gear level is to advance two grades, and detect two grades of solenoid valve pressure of the advance not preset second
When pressure limit, force to control the vehicle and be in advance one grade.
In a kind of specific embodiment of the invention, further includes reverse drive gear solenoid valve pressure protection module, is used for:
Obtain one grade of solenoid valve pressure of retrogressing of the vehicle；
When the automobile gear level is to retreat one grade, and detect one grade of solenoid valve pressure of the retrogressing not in preset third
When pressure limit, force to control the vehicle in one grade of retrogressing.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand technical solution of the present invention and its core concept.It should be pointed out that for the common of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for technical staff, these
Improvement and modification are also fallen within the protection scope of the claims of the present invention.
Claims (10)
1. a kind of fluid drive method, which is characterized in that in the controller applied to the vehicle for carrying electrichydraulic control gearbox, packet
It includes:
Obtain car speed and vehicle acceleration；
When judging that vehicle meets the condition of fluid drive, fluid drive process is executed；
When executing the fluid drive process, when the vehicle acceleration described in the first moment be greater than 0, and first moment this
The car speed is all larger than gear shift high speed value Vmax in preceding default first duration, and automobile gear level is in and may be selected in gear
It is non-most high-grade when, then vehicle is upshiftd at first moment；
When the vehicle acceleration described in the second moment is less than 0, and the vehicle in default second duration of second moment before this
Speed is respectively less than gear shift low speed value Vmin, and when automobile gear level is in the not least shelves that gear may be selected, then described second
Moment downshifts vehicle；
Wherein, first moment and second moment are any time when executing the fluid drive process.
2. fluid drive method according to claim 1, which is characterized in that after the execution fluid drive process,
Further include:
When receiving demarcation signal, in section [V0-a,V0+ b] in select n data；V0For preset initial value, a and b
It is parameter preset, n is positive integer and n >=2；
For each data selected, using the data as gear shift high speed value Vmax, and primary upshift is performed in vehicle
When, acceleration average value when this time upshift is calculated, and switch to next data conduct selected after calculating finishes
Gear shift high speed value Vmax；
After calculating n acceleration average value, by corresponding to the minimum value of n acceleration average value from section [V0-a,
V0+ b] in the data that select, as the gear shift high speed value Vmax finally determined.
3. fluid drive method according to claim 2, which is characterized in that it is described by n acceleration average value most
From section [V corresponding to small value0-a,V0+ b] in the data that select, as the gear shift high speed value Vmax finally determined it
Afterwards, further includes:
Gear shift low speed value Vmin is determined according to the gear shift high speed value Vmax finally determined.
4. fluid drive method according to claim 3, which is characterized in that the gear shift high speed that the basis finally determines
Value Vmax determines gear shift low speed value Vmin, comprising:
The half for the gear shift high speed value Vmax that will eventually determine out is determined as gear shift low speed value Vmin.
5. fluid drive method according to claim 2, which is characterized in that described in section [V0-a,V0+ b] in select
N data, comprising:
In section [V0-a,V0+ b] in select n data；Wherein, the value of i-th of data is
6. fluid drive method according to claim 1, which is characterized in that described to judge that vehicle meets fluid drive
Condition, comprising:
Do not receiving parking brake signals, and receiving automatic mode signal, and gear selection information be not least gear when,
Judge that vehicle meets the condition of fluid drive.
7. fluid drive method according to any one of claims 1 to 6, which is characterized in that further include:
Obtain the working connection pressure of the vehicle；
When the working connection pressure is not in preset working connection pressure limit, pressure controls the vehicle and is in low gear.
8. fluid drive method according to claim 7, which is characterized in that further include:
Obtain one grade of solenoid valve pressure of advance of the vehicle and two grades of solenoid valve pressure of advance of the vehicle；
When the automobile gear level is to advance one grade, and detect one grade of solenoid valve pressure of the advance not in preset first pressure
When range, force to control the vehicle and be in advance one grade；
When the automobile gear level is to advance two grades, and detect two grades of solenoid valve pressure of the advance not in preset second pressure
When range, force to control the vehicle and be in advance one grade.
9. fluid drive method according to claim 7, which is characterized in that further include:
Obtain one grade of solenoid valve pressure of retrogressing of the vehicle；
When the automobile gear level is to retreat one grade, and detect one grade of solenoid valve pressure of the retrogressing not in preset third pressure
When range, force to control the vehicle in one grade of retrogressing.
10. a kind of automatic shift system, which is characterized in that in the controller applied to the vehicle for carrying electrichydraulic control gearbox,
Include:
Parameter acquisition module, for obtaining car speed and vehicle acceleration；
Fluid drive process triggers module, for when judging that vehicle meets the condition of fluid drive, execute fluid drive into
Journey；
Upshift module, for being greater than 0 when the vehicle acceleration described in the first moment, and first moment before this default first
The car speed is all larger than gear shift high speed value Vmax in duration, and automobile gear level is in non-most high-grade in optional gear
When, then vehicle is upshiftd at first moment；
Downshift module, for when the vehicle acceleration described in the second moment is less than 0, and second moment before this default second
The car speed is respectively less than gear shift low speed value Vmin in duration, and when not least shelves of the automobile gear level in optional gear,
Then vehicle is downshifted at second moment；
Wherein, first moment and second moment are any time when executing the fluid drive process.
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| CN201910271254.XA CN109896471B (en) | 2019-04-04 | 2019-04-04 | Automatic gear shifting method and system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110758416A (en) * | 2019-10-31 | 2020-02-07 | 北京易控智驾科技有限公司 | Control system and control method for gear limit of unmanned mine car |
| CN112065982A (en) * | 2020-08-20 | 2020-12-11 | 北汽福田汽车股份有限公司 | Vehicle gear shifting control method and device, vehicle and medium |
| CN112356842A (en) * | 2020-11-20 | 2021-02-12 | 苏州智加科技有限公司 | Gear adjusting method, gear adjusting device, gear adjusting equipment and storage medium of automatic driving vehicle |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2385844A (en) * | 2002-03-01 | 2003-09-03 | Nippon Yusoki Co Ltd | Control apparatus and control method for a forklift |
| EP1655211B1 (en) * | 2004-10-26 | 2011-03-09 | The Raymond Corporation | Pallet truck tiller arm with acceleration control |
| CN102829173A (en) * | 2012-09-18 | 2012-12-19 | 浙江吉利汽车研究院有限公司杭州分公司 | Gear shifting control method of mechanical automatic transmission |
| CN103758995A (en) * | 2014-01-26 | 2014-04-30 | 安徽江淮汽车股份有限公司 | Braking kick-down control method of double clutch automatic transmission |
| CN103982643A (en) * | 2014-05-27 | 2014-08-13 | 盛瑞传动股份有限公司 | Automobile, ramp gear-shifting control method and system of automatic transmission of automobile |
| CN104260640A (en) * | 2014-07-09 | 2015-01-07 | 杭州杭叉电器有限公司 | Engineering special vehicle intelligent instrument and application method thereof |
| CN105276156A (en) * | 2014-07-09 | 2016-01-27 | 上海汽车集团股份有限公司 | Method and device for controlling automatic gear shifting of automobile |
| CN109139891A (en) * | 2017-06-28 | 2019-01-04 | 天津市松正电动汽车技术股份有限公司 | A kind of bus upward slope Shifting |
-
2019
- 2019-04-04 CN CN201910271254.XA patent/CN109896471B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2385844A (en) * | 2002-03-01 | 2003-09-03 | Nippon Yusoki Co Ltd | Control apparatus and control method for a forklift |
| EP1655211B1 (en) * | 2004-10-26 | 2011-03-09 | The Raymond Corporation | Pallet truck tiller arm with acceleration control |
| CN102829173A (en) * | 2012-09-18 | 2012-12-19 | 浙江吉利汽车研究院有限公司杭州分公司 | Gear shifting control method of mechanical automatic transmission |
| CN103758995A (en) * | 2014-01-26 | 2014-04-30 | 安徽江淮汽车股份有限公司 | Braking kick-down control method of double clutch automatic transmission |
| CN103982643A (en) * | 2014-05-27 | 2014-08-13 | 盛瑞传动股份有限公司 | Automobile, ramp gear-shifting control method and system of automatic transmission of automobile |
| CN104260640A (en) * | 2014-07-09 | 2015-01-07 | 杭州杭叉电器有限公司 | Engineering special vehicle intelligent instrument and application method thereof |
| CN105276156A (en) * | 2014-07-09 | 2016-01-27 | 上海汽车集团股份有限公司 | Method and device for controlling automatic gear shifting of automobile |
| CN109139891A (en) * | 2017-06-28 | 2019-01-04 | 天津市松正电动汽车技术股份有限公司 | A kind of bus upward slope Shifting |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110758416A (en) * | 2019-10-31 | 2020-02-07 | 北京易控智驾科技有限公司 | Control system and control method for gear limit of unmanned mine car |
| CN110758416B (en) * | 2019-10-31 | 2020-11-10 | 北京易控智驾科技有限公司 | Control system and control method for gear limit of unmanned mine car |
| CN112065982A (en) * | 2020-08-20 | 2020-12-11 | 北汽福田汽车股份有限公司 | Vehicle gear shifting control method and device, vehicle and medium |
| CN112065982B (en) * | 2020-08-20 | 2022-03-08 | 北汽福田汽车股份有限公司 | Vehicle gear shifting control method and device, vehicle and medium |
| CN112356842A (en) * | 2020-11-20 | 2021-02-12 | 苏州智加科技有限公司 | Gear adjusting method, gear adjusting device, gear adjusting equipment and storage medium of automatic driving vehicle |
| CN112356842B (en) * | 2020-11-20 | 2022-03-18 | 苏州智加科技有限公司 | Gear adjusting method, gear adjusting device, gear adjusting equipment and storage medium of automatic driving vehicle |
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|---|---|
| CN109896471B (en) | 2020-09-01 |
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