CN106931157A - A kind of double-clutch speed changer shift control method for avoiding dual-clutch gear-shifting power cycle - Google Patents

A kind of double-clutch speed changer shift control method for avoiding dual-clutch gear-shifting power cycle Download PDF

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Publication number
CN106931157A
CN106931157A CN201710146896.8A CN201710146896A CN106931157A CN 106931157 A CN106931157 A CN 106931157A CN 201710146896 A CN201710146896 A CN 201710146896A CN 106931157 A CN106931157 A CN 106931157A
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China
Prior art keywords
clutch
engagement
double
normal pressure
driving disc
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CN201710146896.8A
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CN106931157B (en
Inventor
夏光
郭东云
常佳男
郑友
谢海
闫瑞琦
滑杨莹
杜克
邹斌
施信信
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Hefei University of Technology
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Hefei University of Technology
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/04—Smoothing ratio shift
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/50—Signals to an engine or motor
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/50—Problem to be solved by the control system
    • F16D2500/502—Relating the clutch
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70402—Actuator parameters
    • F16D2500/70406—Pressure
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70452—Engine parameters
    • F16D2500/70454—Engine speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Operated Clutches (AREA)
  • Control Of Transmission Device (AREA)

Abstract

The invention discloses a kind of double-clutch speed changer shift control method for avoiding dual-clutch gear-shifting power cycle, it is characterised in that：When double-clutch automatic gearbox is shifted gears, adjustment of rotational speed with engine is controlled by the Detaching and Lapping of double clutch, so as to avoid double clutch from producing gearshift power cycle, the gearshift power consumption of double clutch is reduced, reduce shift shock simultaneously, improve the smooth gear shifting of double-clutch speed changer.

Description

A kind of double-clutch speed changer gearshift for avoiding dual-clutch gear-shifting power cycle is controlled Method
Technical field
The present invention relates to a kind of automobile automatic gear shift control method, specifically one kind avoids dual-clutch gear-shifting The double-clutch speed changer shift control method of power cycle.
Background technology
Double-clutch automatic gearbox (Dual Clutch Transmission, DCT) is the basis based on manual transmission On a kind of new automatic transmission that develops, transmitted by entering action edge using two clutches, first clutch During transmission current gear, the gear that second clutch can carry out changing to gear is preset, when needing to complete current gear and change When entering the switching of gear, first clutch releases current gear, while second clutch engagement changes to gear, therefore DCT Not only possess the flexibility of manual transmission, but also the comfortableness with automatic transmission, without bright in whole gearshift procedure Aobvious power interruption phenomenon, while response of shifting gears is fast, DCT is got the favour of people with its outstanding performance, rapid popularization and application.
Power loss is reduced when DCT special architectural characteristic causes gearshift, but due to existing during power cycle, clutch Shift time is more long, impacts smaller, but clutch abrasion is bigger, conversely, the shift time of clutch is shorter, beneficial to improvement clutch Device wear condition, impacts bigger, and smooth gear shifting is poorer, thus shift time and shift shock turn into power when there is power cycle The conflict for reconciling is difficult to during handing-over.Therefore, power cycle phenomenon is also easy to produce in DCT shift processes, causes power loss, changes Gear ride comfort declines and shift clutch parts damages.
The content of the invention
The present invention proposes that one kind avoids dual-clutch gear-shifting power to avoid the weak point existing for above-mentioned prior art The double-clutch speed changer shift control method of circulation, to can pass through when double-clutch speed changer automatic transmission is shifted gears The Detaching and Lapping control of double clutch and the adjustment of rotational speed of engine, it is to avoid clutch produces gearshift power cycle, reduce it is double from The gearshift power consumption of clutch, while reducing shift shock, improves the smooth gear shifting of double-clutch speed changer.
The present invention to achieve the above object of the invention, is adopted the following technical scheme that：
The present invention is a kind of to be the characteristics of avoid the double-clutch speed changer shift control method of dual-clutch gear-shifting power cycle Carry out as follows：
Step 1, the normal pressure for reducing separation clutch, make the driving disc spacing pressing of the separation clutch be in clutch plate and separate Critical condition, while increasing the normal pressure of engagement clutch, makes the driving disc spacing pressing of the engagement clutch be in clutch plate and engages Critical condition；
Step 2, progressively adjust it is described separation clutch and the normal pressure for engage clutch, while progressively adjust start The rotating speed of machine, make driving disc spacing pressing and the clutch plate of the separation clutch incrementally increase slide rub, the driving disc spacing pressing for engaging clutch Incrementally increased with clutch plate and engaged；
Step 3, when it is described separation clutch normal pressure drop to zero when, the driving disc spacing pressing of the separation clutch with it is driven Disk is kept completely separate, and the driving disc spacing pressing for separating clutch is in completely sliding state of rubbing, the correspondence engagement clutch with clutch plate Normal pressure be it is described engagement clutch maintenance pressure, keep it is described engagement clutch maintenance pressure it is constant, until described The driving disc spacing pressing for engaging clutch is completely combined with clutch plate；
Step 4, when it is described engagement clutch driving disc spacing pressing rotating speed be equal to it is described engagement clutch clutch plate rotating speed when, institute The driving disc spacing pressing for stating engagement clutch is completely combined with clutch plate, while continuing to increase the normal pressure for engaging clutch to described Untill engaging the rated value of clutch engagement force.
The characteristics of automatic transmission shift control method for correcting of the present invention, lies also in,
Clutch is separated described in the step 2 to enter in accordance with the following methods with the regulation of the normal pressure for engaging clutch OK：
According to the requirement of gearshift response time, progressively reduce the normal pressure of the separation clutch, while incrementally increasing institute The normal pressure of engagement clutch is stated, and makes to engage the friction torque T of clutch described in shift processc2Meet formula (1)：
In formula (1)：i1It is current gear gearratio；i2To change to gear gearratio；Tcut1For the transmission for separating clutch turns Square；R is tire radius；M is tire quality；jBIt is clutch driven plate rear end thereof inertia summation；jRIt is vehicle wheel rotation inertia.
The regulation of engine speed described in the step 2 is carried out in accordance with the following methods：
Adjust the engine speed, make the engine speed more than it is described separation clutch driven plate rotating speed with it is described Maximum between engagement clutch driven plate rotating speed.
Transmission design when the rated value of clutch engagement force is engaged described in the step 4 for engagement clutch normal work Normal pressure needed for torque.
Compared with the prior art, the present invention has the beneficial effect that：
1st, the present invention carries out separation and the Engagement Control of double clutch by adjusting the normal pressure of double clutch, effectively reduces Shift shock, improves the smooth gear shifting of double-clutch speed changer.
2nd, the present invention separate in double clutch, in cohesive process, by the adjustment of rotational speed to engine, it is to avoid clutch Gearshift power cycle is produced during gearshift, the gearshift power consumption of double clutch is reduced, while avoiding double clutch shifting parts Damage, extend the service life of double clutch shifting parts.
3rd, Detaching and Lapping control and the adjustment of rotational speed of engine of the present invention by double clutch, improve double clutch and change Gear performance, without changing vehicle hardware system, it is only necessary to increase this control method pair in automatic transmission electronic control unit The software program answered, it is workable, and be applicable to equip different type double-clutch automatic gearbox vehicle, the scope of application Extensively.
Brief description of the drawings
Fig. 1 is the dual clutch transmission structure sketch of the embodiment of the present invention；
Fig. 2 is two clutch normal pressures adjustment schematic diagram in double-clutch speed changer shift process of the invention；
Fig. 3 is engine speed adjustment schematic diagram in double-clutch speed changer shift process of the invention.
Specific embodiment
In the present embodiment, a kind of double-clutch speed changer shift control method for avoiding dual-clutch gear-shifting power cycle is When double-clutch automatic gearbox is shifted gears, the adjustment of rotational speed with engine is controlled by the Detaching and Lapping of double clutch, kept away Exempt from double clutch and produce gearshift power cycle, reduce the gearshift power consumption of double clutch, while reducing shift shock, improve double The smooth gear shifting of clutch speed changer.It is to carry out as follows specifically refering to Fig. 1-Fig. 3：
Step 1, double-clutch speed changer complete power and transmit and gearratio change by two clutches, define current gear Under enter action edge transmission clutch be separate clutch, it is necessary to change to gear enter action edge transmission clutch for engagement clutch Device, before transforming gear is carried out, it is necessary first to eliminate and separate clutch and the idle stroke for engaging clutch, i.e.,：Reduce separate from The normal pressure of clutch, is in driving disc spacing pressing and the clutch plate of the separation clutch and separates critical condition, at the same increase engage from The normal pressure of clutch, makes the driving disc spacing pressing of the engagement clutch be in clutch plate and engages critical condition, eliminates and separates clutch With the idle stroke for engaging clutch, separation clutch is set to reach the critical condition that power joins with clutch is engaged, to shorten The shift time of dual-clutch transmission；
Step 2, when transforming gear is carried out, in order to shorten shift time, improve smooth gear shifting, avoid power interruption, Transmitting the separation clutch of current gear power needs to gradually reduce power transmission, and transmission changes to the engagement clutch of gear power Need to incrementally increase power transmission, separate clutch needs to join into action edge, it is necessary to progressively regulation is separated with engagement clutch Clutch and the normal pressure for engaging clutch, the driving disc spacing pressing and clutch plate for making separation clutch incrementally increase cunning and rub, engage clutch The driving disc spacing pressing of device is incrementally increased with clutch plate and engaged；Meanwhile, produce work(between clutch with engaging in order to avoid separating clutch Rate is circulated, it is necessary to progressively adjust the rotating speed of engine；
Specifically, separate clutch is carried out in accordance with the following methods with the regulation of the normal pressure for engaging clutch：
The shock extent that smooth gear shifting is evaluated during gearshift is illustrated first：
Shock extent in Vehicle Shifting is often represented with the first derivative of vehicle acceleration, because shift process is shorter, Speed change not substantially, therefore during rolling resistance moment and air drag square can be considered constant, can obtain separate clutch Progressively cunning rub, engage clutch progressively under engagement state shock extent expression formula, wherein, j1For under regulation engine speed conditions Shock extent when the equal inactivity of two clutches is circulated, j2There is shock extent during power cycle for separation clutch.
In formula (1), formula (2)：i1It is current gear gearratio；i2To change to gear gearratio；Tc1To separate clutch Moment of friction；Tc2To engage the moment of friction of clutch；R is tire radius；M is tire quality；jBAfter clutch driven plate End rotary inertia summation；jRIt is vehicle wheel rotation inertia.
From above-mentioned shock extent expression formula, the smooth gear shifting of double-clutch speed changer is mainly turned by clutch friction is separated Square rate of changeEngagement clutch friction torque rate of changeAnd with the presence or absence of the influence of the factors such as power cycle.
Separate clutch friction torque rate of change Tc1, engagement clutch friction torque rate of change Tc2Expression formula it is as follows：
In formula (3), formula (4)：To separate the rate of change of clutch, engagement clutch engagement force；Rc、rcRespectively It is the big path of clutch disk；μ is the coefficient of friction of clutch disk.
From formula (3), formula (4),TogetherIt is proportional relationship, and due to separating clutch in shift process Device engaging force is gradually reduced, and engagement clutch engagement force gradually rises, thereforeIt is negative value,Be on the occasion of.
(1) when two clutches all do not exist power cycle, from the expression formula of formula (1) first, by adjusting two clutches The rate of change of device engaging force can in theory realize that shock extent is 0.
(2) when separation clutch has power cycle, during engagement clutch forward direction transmission torque, from formula (2)Two term system numerical symbols are opposite；From gearshift real process, reduce because the side of two clutch normal pressure one increases a side,Itself there is opposite positive-negative relationship, therefore cannot be engaged by adjusting two clutches according to formula (1) expression formula in theory Power size is realized Two are cancelled out each other, and shift shock is reduced to 0 in theory.Meanwhile,Two is derivative term, Itself reflect the rate of change of physical quantity, transformation period is more long, it is smaller to change gentler its value, transformation period is shorter, change more Fierce its value is bigger.Due to there is power cycle, it is impossible to by adjusting clutch engagement force by this two eliminations, therefore there is power The clutch gear-shift time is more long during circulation, impacts smaller, but clutch abrasion is bigger；Conversely, shift time is shorter, impact is got over Greatly, but be conducive to improve clutch abrasion situation.
Turn into contradiction amount accordingly, there exist shift shock degree during power cycle and shift time (clutch abrasion), be The contradiction reconciled between shift time and shift shock, need to set up the system optimization Controlling model based on principle of minimum, but control Process processed is extremely complex.And during inactivity circulation gearshift, due toTwo can mutually offset and remove, therefore in the absence of shift time Contradiction between shift shock, is shifted gears under any shift time and can realize shock extent for 0, therefore double-clutch speed changer is shifted gears When should avoid the generation of power cycle.
According to gearshift the response time requirement, progressively reduce separate clutch normal pressure, while incrementally increase engagement from The normal pressure of clutch, and make the friction torque T of engagement clutch in shift processc2Meet formula (5), you can ensure that two clutches are changed Shock extent is 0 during gear power handing-over cunning is rubbed.
Wherein, the transmission torque T of clutch is separatedcut1Expression formula it is as follows：
In formula (6)：It is motor torque rate of change；jAIt is clutch driving plate and its anterior member rotary inertia summation； TrIt is the running resistance square comprising rolling resistance moment and air drag square.
Analyzed more than, when double-clutch speed changer has power cycle in shift process, it is difficult to it is flat to solve gearshift Pliable problem, therefore, gearshift power cycle must be eliminated in shift process in double-clutch speed changer, turned by adjusting engine Inactivity circulation during achievable two clutch gear-shifts of speed.
During clutch forward direction transmission moment of friction, clutch driving plate rotating speed have to be larger than clutch plate rotating speed；If clutch Clutch plate rotating speed is higher than driving disc spacing pressing rotating speed, then moment of friction direction of transfer becomes as by clutch plate to driving disc spacing pressing.Moment of friction it is anti- Power cycle can be caused to produce to transmission.In shift process, if clutch driving plate rotating speed is less than separation clutch or engagement The clutch plate rotating speed of clutch, then double clutch in the presence of gearshift power cycle, dislike by consumption of engine power, the stress of part of shifting gears Change, and smooth gear shifting is difficult to solve, in order to avoid the gearshift power cycle of double-clutch speed changer is, it is necessary to make clutch driving plate Rotating speed is more than the clutch plate rotating speed for separating clutch or engagement clutch, because clutch driving plate is straight with engine output shaft Even, then clutch driving plate rotating speed is identical with engine speed, therefore, the regulation of engine speed is carried out in accordance with the following methods：
Regulation engine speed, makes engine speed more than separation clutch driven plate rotating speed and engages clutch driven plate Maximum between rotating speed.
Step 3, when separate clutch normal pressure drop to zero when, separate clutch driving disc spacing pressing it is handed down from the older generations of the family with clutch plate The moment of friction passed is zero, separate clutch driving disc spacing pressing be kept completely separate with clutch plate, separation clutch driving disc spacing pressing with it is driven Disk is in completely sliding state of rubbing, and the normal pressure of correspondence engagement clutch is the maintenance pressure for engaging clutch, now engages clutch The driving disc spacing pressing of device is not fully engaged also with clutch plate, in order to reduce shift shock, improves smooth gear shifting, remains engaged with clutch Maintenance pressure it is constant, until engagement clutch driving disc spacing pressing be completely combined with clutch plate；
Step 4, when engage clutch driving disc spacing pressing rotating speed be equal to engagement clutch clutch plate rotating speed when, engage clutch Driving disc spacing pressing be completely combined with clutch plate, now, engage clutch maintenance pressure be only ensure transmission changed to gear torque Minimum normal pressure, if engine output torque fluctuation, vehicle meet running resistance torque change, engagement clutch occur Skidding, it is impossible to adapt to the change of transmission torque, in order to improve adaptability of the engagement clutch to transmission torque change, while Needs continue to increase the normal pressure of engagement clutch to the rated value of engagement clutch engagement force.
When transmission for vehicles is designed, it is necessary to carry out speed changer according to engine parameter, transmission ratio, whole-car parameterses Each gear transmits torque calculation, and according to needed for each gear transmits torque calculation speed changer different drive ratios clutch malleation Power, designs certain redundancy to the normal pressure of clutch on this basis, it is ensured that in vehicle parameter, driving cycle, drive behaviour The malleation of clutch clutch needed for energy reliable delivery motor torque, therefore speed changer different drive ratios during vertical working conditions change Normal pressure needed for transmission design torque when the calculated value of power adds pressure design redundancy value, as clutch normal work, therefore, Normal pressure needed for transmission design torque when engaging the rated value of clutch engagement force for engagement clutch normal work.
Embodiment：The present embodiment is changed the fast double-clutch automatic gearbox of certain model 7 using control method of the invention Gear control, specific control process is as follows：
Fig. 1 is the fast dual clutch transmission structure sketch of certain model 7, and choosing a gear and two grades carries out gearshift control, to other Gear does not do expression in detail.C1, C2 represent clutch 1 and clutch 2 respectively in Fig. 1, then changed to during two grades at one grade, To separate clutch, clutch 2 is engagement clutch to clutch 1；G1~G7 represents gears at different levels, and specifies gearratio iabIt is tooth Gearratio (a=1~7 of the wheel between Ga, Gb；B=1~7), then one keep off gearratio i1It is i12×i37, two gear gearratio i2It is i45 ×i67。
If the original state of double-clutch speed changer is combined for clutch C1, clutch C2 is separated, and with a gear job.Now by One gear changes to two gears, then two gear synchronizers combine (synchronizer is not represented in Fig. 1, shown state is one or two gear synchronizers in advance The state for combining), now clutch C2 is still separated；Shift process continues, and clutch C2 thrusts gradually increase, clutch C1 Thrust is gradually reduced, and when clutch C1 is kept completely separate, clutch C2 separates a gear synchronizer after being completely combined, shifted gears Into.
In the shift process of double-clutch speed changer, there are three kinds of states in each shift clutch, i.e.,：Separate, cunning is rubbed (conjunction) and engagement.Separated from from the point of view of mathematical notation and the sliding two states that rub can describe its torque with same expression formula, difference Place is only that under released state that clutch engagement force is 0, can be considered that the cunning for being not loaded with engaging force is rubbed state.It can be considered that every Individual shift clutch only exists two states：Cunning is rubbed, separates, therefore the shift process of double-clutch speed changer has following four shape State, i.e.,：
A () C1 engagements C2 is slided and rubbed；B () C1 is slided C2 cunnings of rubbing and is rubbed；C () C1 slides the C2 engagements that rub；D () C1 engagement C2 engagements are obvious, D () state is untenable, therefore (a), (b), (c) three kinds of states are only existed in the shift process of double-clutch speed changer.
Refering to Fig. 2, curve ordinate is the normal pressure F of clutch, and wherein solid line is C1 normal pressures, and dotted line is C2 malleations Power, then the adjustment of two clutch normal pressures is divided into following several stages in double-clutch speed changer shift process：
1st, 0~t0 stages
Double-clutch speed changer is in (a) state, due to i1More than i2, then clutch C1 clutch plates rotating speed is more than clutch C2 Clutch plate rotating speed, therefore C2 does not exist power cycle phenomenon.If there is power cycle, the transmission torque T of clutch C2 in C1cut1For Negative value, but its initial equilibrium state is for just, period must be by 0 point, if the condition lance always remained engaged with C1 under this state if it is by 0 point Shield, therefore C1, C2 do not exist power cycle phenomenon under current state.
2nd, t0~t3 stages
This stage is the critical stage of double-clutch speed changer gearshift control, and following several stages can be divided into again：
(1) t0~t1 stages
Double-clutch speed changer is in (a) state, and clutch C1 normal pressures rapidly drop to critical value, and clutch C1 is in and divides From critical condition, the friction torque that now C1 is transmitted is equal to Tcut1, clutch C2 normal pressures are climbed to critical value, clutch Device C2 is in engagement critical condition.
(2) t1~t2 stages
Double-clutch speed changer is in (b) state, and C1 driving disc spacing pressings rotating speed, C2 driving disc spacing pressing rotating speeds are all equal to when current state is initial C1 clutch plates rotating speed and more than C2 clutch plate rotating speeds.There are C1 driving disc spacing pressings rotating speed, C2 driving disc spacing pressings rotating speed at the end of current state all etc. In C2 clutch plates rotating speed and less than C1 clutch plate rotating speeds.
Clutch driven plate rotating speed moment of friction direction of transfer if higher than clutch driving plate rotating speed becomes as by driven end To drive end, then power cycle can occur, because C2 clutch plate rotating speeds are consistently less than C1 clutch plate rotating speeds, thus it is idle in the absence of C1 Rate circulates the operating mode of C2 power cycles；If C1, C2 all have the operating mode of power cycle, make in real time equivalent to regulation engine speed Speed is counter to drag engine rotation, it is clear that be unreasonable；Therefore at t1~t2 sections, if the adjustment of rotational speed control without engine, Must there is power cycle operating mode in C1, therefore, the gearshift that the method for taking engine speed to adjust carries out clutch C1 and C2 is controlled, C1 can be prevented effectively from and produce power cycle, concrete measure refers to Fig. 3, and curve ordinate is rotating speed n, and wherein solid line is C1 clutch plates Rotating speed, dotted line long is C2 clutch plate rotating speeds, and short dash line is engine speed, and specific adjusting method is as follows：
Clutch C1 normal pressures can need to be according to C1 normal pressures regulation and control side according to set sliding friction time linear decline, clutch C2 Formula is acted, i.e., in the friction torque T of t2 time point clutches C2c2Meet formula (5) constraint, remaining linearly increases, and Ensure the maximum between t1~t2 sections of intrinsic motivation rotating speed is all higher than clutch C1 and C2 clutch plate rotating speed.
(3) t2~t3 stages
Double-clutch speed changer is in (b) state, and clutch C1 normal pressures have dropped to 0, control clutch C2 normal pressure dimensions Hold constant, until C2 is fully engaged, maintenance clutch C2 normal pressures are constant in t2~t3 sections, and shock extent connects during can making this 0 is bordering on, almost without shift shock.
3rd, t3~t4 stages
Double-clutch speed changer is in (c) state, and clutch C2 is fully engaged, and its normal pressure to clutch is raised rapidly and is engaged The rated value of power.
So far, 7 fast double-clutch speed changers are completed controlled by the gearshift of one grade of double clutch for changing to two grades, it is to avoid Double clutch produces power cycle in shift process, improves smooth gear shifting, reduces the damage of gearshift part.
Therefore, using dual-clutch gear-shifting control method of the invention, separation and the Engagement Control of double clutch are carried out, can Shift shock is effectively reduced, the smooth gear shifting of double-clutch speed changer is improved, it is to avoid produces gearshift power to follow during clutch gear-shift Ring, reduces the gearshift power consumption of double clutch, while the damage of double clutch shifting parts is avoided, the double clutch shifting parts of extension Service life.

Claims (4)

1. it is a kind of to avoid the double-clutch speed changer shift control method of dual-clutch gear-shifting power cycle, it is characterized in that being walked by following Suddenly carry out：
Step 1, the normal pressure for reducing separation clutch, make the driving disc spacing pressing of the separation clutch critical in separating with clutch plate State, while increasing the normal pressure of engagement clutch, makes the driving disc spacing pressing of the engagement clutch critical in engaging with clutch plate State；
Step 2, separation clutch and the normal pressure for engage clutch are progressively adjusted, while progressively adjusting engine Rotating speed, make the separation clutch driving disc spacing pressing and clutch plate incrementally increase cunning rub, the driving disc spacing pressing for engaging clutch and from Moving plate incrementally increases engagement；
Step 3, when it is described separation clutch normal pressure drop to zero when, the driving disc spacing pressing of the separation clutch is complete with clutch plate Fully separating, the driving disc spacing pressing for separating clutch is in completely sliding state of rubbing with clutch plate, and the correspondence engagement clutch is just Pressure is the maintenance pressure of the engagement clutch, keeps the maintenance pressure of the engagement clutch constant, until the engagement The driving disc spacing pressing of clutch is completely combined with clutch plate；
Step 4, when it is described engagement clutch driving disc spacing pressing rotating speed be equal to it is described engagement clutch clutch plate rotating speed when, it is described to connect The driving disc spacing pressing for closing clutch is completely combined with clutch plate, while continuing to increase the normal pressure for engaging clutch to the engagement Untill the rated value of clutch engagement force.
2. automatic transmission shift control method for correcting according to claim 1, it is characterised in that described in the step 2 Separate clutch is carried out in accordance with the following methods with the regulation of the normal pressure for engaging clutch：
According to the requirement of gearshift response time, progressively reduce the normal pressure of the separation clutch, while incrementally increasing described connecing The normal pressure of clutch is closed, and makes to engage the friction torque T of clutch described in shift processc2Meet formula (1)：
i 2 j B + mR 2 + j R × T c 2 = i 1 j B + mR 2 + j R × T c u t 1 - - - ( 1 )
In formula (1)：i1It is current gear gearratio；i2To change to gear gearratio；Tcut1To separate the transmission torque of clutch；R It is tire radius；M is tire quality；jBIt is clutch driven plate rear end thereof inertia summation；jRIt is vehicle wheel rotation inertia.
3. automatic transmission shift control method for correcting according to claim 1, it is characterised in that described in the step 2 The regulation of engine speed is carried out in accordance with the following methods：
The engine speed is adjusted, makes the engine speed more than separation clutch driven plate rotating speed and the engagement Maximum between clutch driven plate rotating speed.
4. automatic transmission shift control method for correcting according to claim 1, it is characterised in that：
Design torque is transmitted when the rated value of clutch engagement force is engaged described in the step 4 for engagement clutch normal work Required normal pressure.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110375011A (en) * 2019-07-24 2019-10-25 合肥工业大学 A kind of control method avoiding power-shift transmission upshift power cycle
CN111572525A (en) * 2020-05-28 2020-08-25 合肥工业大学 Gear-shifting quality optimization-based power gear-shifting transmission downshift control method
CN114198430A (en) * 2021-12-20 2022-03-18 潍柴动力股份有限公司 Clutch engaging method, device, equipment and medium
CN114922971A (en) * 2022-04-22 2022-08-19 一汽奔腾轿车有限公司 Optimization method and device for DCT (discrete cosine transformation) gear shifting impact at low temperature

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012241888A (en) * 2011-05-24 2012-12-10 Suzuki Motor Corp Control apparatus for twin-clutch automatic transmission
CN104049650A (en) * 2014-05-27 2014-09-17 合肥工业大学 Wet-type DCT clutch temperature control system based on fuzzy control and control method thereof
CN105840808A (en) * 2016-04-26 2016-08-10 中国第汽车股份有限公司 Gear-shifting coordination control method for wet double-clutch automatic speed changer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012241888A (en) * 2011-05-24 2012-12-10 Suzuki Motor Corp Control apparatus for twin-clutch automatic transmission
CN104049650A (en) * 2014-05-27 2014-09-17 合肥工业大学 Wet-type DCT clutch temperature control system based on fuzzy control and control method thereof
CN105840808A (en) * 2016-04-26 2016-08-10 中国第汽车股份有限公司 Gear-shifting coordination control method for wet double-clutch automatic speed changer

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
曲思宇等: "双湿式离合变速箱升挡过程循环功率抑制方法探究", 《机械传动》 *
陈伟等: "双离合自动变速器顺序换挡控制过程研究", 《合肥工业大学学报(自然科学版)》 *
马彪等: "联合油压控制的DCT升挡控制策略研究", 《重庆大学学报》 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110375011A (en) * 2019-07-24 2019-10-25 合肥工业大学 A kind of control method avoiding power-shift transmission upshift power cycle
CN111572525A (en) * 2020-05-28 2020-08-25 合肥工业大学 Gear-shifting quality optimization-based power gear-shifting transmission downshift control method
CN114198430A (en) * 2021-12-20 2022-03-18 潍柴动力股份有限公司 Clutch engaging method, device, equipment and medium
CN114198430B (en) * 2021-12-20 2024-02-20 潍柴动力股份有限公司 Clutch engagement method, device, equipment and medium
CN114922971A (en) * 2022-04-22 2022-08-19 一汽奔腾轿车有限公司 Optimization method and device for DCT (discrete cosine transformation) gear shifting impact at low temperature
CN114922971B (en) * 2022-04-22 2024-05-14 一汽奔腾轿车有限公司 Method and device for optimizing DCT gear shifting impact at low temperature

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