CN108302193A - A kind of positive torque downshift method - Google Patents
A kind of positive torque downshift method Download PDFInfo
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- CN108302193A CN108302193A CN201710411447.1A CN201710411447A CN108302193A CN 108302193 A CN108302193 A CN 108302193A CN 201710411447 A CN201710411447 A CN 201710411447A CN 108302193 A CN108302193 A CN 108302193A
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- preset value
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- positive torque
- torque
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Classifications
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/24—Inputs being a function of torque or torque demand dependent on the throttle opening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- 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
- F16H2061/0474—Smoothing ratio shift by smoothing engagement or release of positive clutches; Methods or means for shock free engagement of dog clutches
Abstract
The present invention provides a kind of positive torque downshift method, this method is suitable for the electric vehicle Pneumatic shift system of at least two clutches of control unit control, including step, enter positive torque downshift pattern in zero moment, it is closed the access that reversal valve is connected to the second cylinder, the access of the first cylinder of connection is opened, then straight-through valve is set low into level, is gas pedal value by driving motor constant torque；Straight-through valve is set into high level in the first predetermined time, driving motor torque is risen into the first preset value, control unit reception judges that gearbox output tach signal reaches the second preset value, then enters next stage, otherwise do not enter；Solve the problems, such as electric automobile gearshift.
Description
Technical field
The present invention relates to electric vehicle field more particularly to a kind of positive torque downshifts of pure electric vehicle Pneumatic shift system
Method.
Background technology
Relative to hybrid vehicle and fuel cell car, pure electric automobile replaces oil-burning machine with motor, low noise,
Pollution-free, space and weight that motor, fuel tank and transmission system account for less can be used to the demand of balancing battery；And it is single because using
Electric energy, electric-control system compared to hybrid electric vehicle it is greatly simplified, electric vehicle is simple in structure compared with internal-combustion engines vehicle, operating, pass
Dynamic component is few, and maintenance amount is small；Pure electric vehicle eliminates fuel tank, engine, cooling system and exhaust system, compared to biography
The internal combustion gasoline engine dynamical system of system automobile, pure electric vehicle energy conversion efficiency higher, pure electric automobile should be pushed greatly
Wide developing direction.
Major part electric vehicle running part only assembles single-stage speed reducing case at present, this makes motor be chronically at critical point fortune
Turn, reduces the efficiency of the output of power；Single-stage speed reducing case is unfavorable for the economy and comfort of vehicle, and single-stage speed reducing case
Big retarding ratio is generally used, causes vehicle to be chronically at higher rotating speed critical point, economy is not high；More gear gearboxes are compared
Fixed gear can significantly promote the power output efficiency of motor, if one can be matched to the loss smaller of power output
The rational multi-gear gear-case of ratio coverage, to optimize motor power output characteristics, it will economy and dynamic property is substantially improved,
Battery loss is reduced, the course continuation mileage of battery is increased.And the shift shock and power interruption of more gear automatic gear-box are just certainly
The technological difficulties of dynamic gearbox.
Invention content
The technical problem to be solved in the present invention is to solve the problems, such as electric automobile gearshift.
The present invention provides a kind of positive torque downshift method, and this method is suitable at least two clutches of control unit control
Electric vehicle Pneumatic shift system, including step enters positive torque downshift pattern in zero moment, is closed reversal valve and is connected to the second gas
The access of cylinder, opens the access of the first cylinder of connection, then straight-through valve is set low level, and driving motor constant torque is stepped on for throttle
Plate value；Straight-through valve is set into high level in the first predetermined time, driving motor torque is risen into the first preset value, control unit connects
Receipts judge that gearbox output tach signal reaches the second preset value, then enter next stage, otherwise do not enter；Second it is default when
It carves, is third preset value by driving motor constant torque to straight-through valve pwm pulse width modulated；Third predetermined time will be led directly to
Valve sets low level, reduces driving motor torque to the 4th preset value, control unit reception judges whether tach signal reaches the 5th
Preset value is then to enter next stage；4th predetermined time carries out pulse width modulation, driving motor torque to straight-through valve PWM
Rise to the 6th preset value；Straight-through valve is set high level by the 5th predetermined time, and shift terminates.
Specifically, first preset value is 80-120Nm.
Specifically, second preset value is 1600r/min-200r/min, preferably 1800r/min.
Specifically, the third preset value is 300Nm-500Nm.
Preferably, the 4th preset value is 80Nm-120Nm.
Further, the 5th preset value is set as 2200r/min-2600r/min.
Specifically, the 6th preset value is gas pedal value.
Specifically, duty ratio when carrying out pulse width modulation to straight-through valve is set as 20%.
Preferably, the zero moment, the first predetermined time, the second predetermined time, third predetermined time, the 4th it is default when
It carves, the time interval between the 5th predetermined time is 3:1:3:6:4.
The invention has the advantages that：In time carry out the sequence of operations such as torque transfer, the follow-up of straight-through valve pressure so that
The power output that user experiences both will not escape, will not have strong impact sense, reach promoted occupant comfort it is same
When again have enough power outputs, have good practical function.
Description of the drawings
Fig. 1 is pure electric vehicle amount shifting system schematic diagram of the present invention；
Fig. 2 is that positive torque upshift method parameter of the present invention converts schematic diagram；
Fig. 3 is positive torque upshift method flow diagram of the present invention；
Fig. 4 is that the negative torque downshift method parameter of the present invention converts schematic diagram；
Fig. 5 is the negative torque downshift method flow diagram of the present invention；
Fig. 6 is that positive torque downshift method parameter of the present invention converts schematic diagram；
Fig. 7 is positive torque downshift method flow diagram of the present invention.
Reference sign：
1, air source；
2, filter；
3, straight-through valve；
4, muffler；
5, muffler；
6, reversal valve；
7, the first cylinder；
8, the second cylinder.
Specific implementation mode
In order to describe the technical content, the structural feature, the achieved object and the effect of this invention in detail, below in conjunction with embodiment
And attached drawing is coordinated to be explained in detail.
Referring to Fig. 1, a kind of 2 speed automatic gearbox shifting system of pure electric vehicle of the present invention, a kind of pure electric vehicle changes
Gear system, including control unit, driving motor, pressure control loop；The pressure control loop includes straight-through valve, reversal valve,
The straight-through valve is connect with reversal valve, and the reversal valve is connect with several cylinders；Each cylinder is connect with a clutch respectively；
The driving motor is connect by gearbox with vehicle drive system；
The controller unit is for receiving vehicle input instruction, being additionally operable to driving motor, straight-through valve, reversal valve output
Control instruction.In some preferred embodiments, shifting system includes that TCU (automatic gear-box control unit) one keeps off clutch,
Two gear clutches.It also selects 3 position-5 way valve as block selecting solenoid valve, executes gear selection instruction, also select 2/2-way
Straight-through valve is combined as shift process control valve, control clutch.System TCU receives throttle, brake opening amount signal, output turn
Fast signal judges shift opportunity, and shift control signal is sent to driving motor, pressure control loop.Driving motor receives TCU
Signal executes shift operating mode, and pressure control loop receives TCU signals, executes shift logic instruction, pusher cylinder locking clutch
Device completes shift.Through the above scheme, enable to electric vehicle that the when of switching torque is being needed there are enough power outputs, and
And when switching torque will not dynamic output shakiness cause terminal or impact sense the problem of.Wherein：1, driving motor demand turns
Square is calculated by each gear clutch friction plate torque capacity and is obtained, final to determine after Laboratory Calibration amendment；2, clutch control
Pressing pressure C1, C2, shift delay time t (t0~t5), PWM solenoid valve pulse width control parameters are by solenoid valve CV values (stream
Coefficient of discharge), clutch friction plate free clearance, clutch friction plate torque capacity, the parameters such as cylinder bearing area calculate and obtain,
It is final to determine after Laboratory Calibration amendment.
In some other embodiment, the cylinder is two, and ventilate with reversal valve connects respectively.Certainly, cylinder with from
Clutch could be provided as multigroup, meet the needs of more shift controls.
Further include air source, filter, the air source to preferably be supplied to straight-through valve in other embodiments
It is connect with the inlet side of filter, the outlet of the filter is connect with straight-through valve.Reached by above-mentioned setting and has preferably been supplied
Technique effect.
Further include muffler in preferred embodiment, the muffler is connect with reversal valve, and the muffler, which is set to, to be changed
To the pressure relieving end of valve.When reversal valve needs to carry out pressure release to cylinder in shift process, muffler can be reduced well
The operating noise of the present apparatus solves the problems, such as that operating noise is excessive.
In certain embodiments, further include positive torque upshift method, this method is suitable for the gear clutch of reversal valve unicom two
Pneumatic electro vehicle shifting system.The upshift method includes step, (see Fig. 3)：TCU judge accelerator open degree, brake aperture,
The signals such as gearbox output rotating speed, current shift reach preset value, into positive torque upshift pattern.Wherein, A is first clutch
Access, it is unlatching to be worth when being 1；B is second clutch access, and it is unlatching to be worth when being 1；C is straight-through valve state, 1 unlatching, percentage
Number is duty ratio；T is motor output torque value；N is motor speed.Shift process：(1), the t0 moment enters shift mode, carries out
Step：Reversal valve sets two gear working positions, that is, the access for being connected to the second cylinder is opened, and the access of the first cylinder of connection is closed, and will
Straight-through valve sets low level；Driving motor torque is arranged in first clutch control pressure C1 rapid decreases after above-mentioned steps at this time
Value is set as consistent with gas pedal value, and is delayed to t1；(2), straight-through valve is set high level by the t1 moment, at this time second clutch
Control pressure C2 rapid increases, torque value is set as the first preset value, such as 400Nm at this time, delay to t2；(3), when t2
It carves, carries out straight-through valve pwm pulse width modulated, duty ratio could be provided as 20% at this time, and second clutch control pressure C2 is slow
Slow to rise, first clutch is slowly detached from this time, with the torque exchange that can realize the first, second clutch, is passed through
The punching gear in shift process can be reduced to straight-through valve progress pulse width modulation to feel, improve the comfort of user's driving, this
Step is delayed to t3；(4) the t3 moment carries out step, straight-through valve is set low level, and second clutch control pressure C2 is permanent at this time
It is fixed, and the torque of motor is reduced, 100Nm is could be provided as, driving motor provides driving moment, under motor speed is quick at this time
Drop, TCU carries out reception judgment step, when judging that tach signal n reaches preset value, such as is arranged in some preferred embodiments
For 1900r/min, start to complete rotating speed exchange, into next stage；(5), the t4 moment, then step is carried out, straight-through valve is set into height
Level, at this time second clutch control pressure C2 rapid increases, driving motor torque rise to the preset value in figure, shift knot
Beam.By above-mentioned design, enable in electric vehicle when using Pneumatic drive system, from figure 2 it can be seen that first
Clutch is the boosting and access that second clutch is carried out when finishing pressure release, just be may be implemented comfortably without interruption, without impact
Gear shift operation, achieve the effect that promoted user shift gears experience.
In some specific embodiments, the first preset value in upper example step can be 300Nm, 400Nm, 500Nm,
Preferably 400Nm could be provided as 80Nm, 100Nm or 120Nm, preferably 100Nm when reducing motor torque at the t3 moment, sentence
For disconnected step when judging that tach signal n reaches preset value, preset value can select 1700r/min, 1900r/min or 2100r/
Min, preferably 1900r/min.Above-described embodiment can preferably carry out being put down between first clutch, second clutch
Steady transition achievees the effect that comfortably without interruption, without crash change of speed.By changing above-mentioned preset value, turning for different moments is adjusted
Square, rotating speed switch between the gear that electric vehicle can be different, such as are equivalent to that a gear rises two gears, two gears rise three gears, three
Gear rises four gears etc..
In order to which the function of pneumatic pure electric vehicle shifting system is better achieved, this method further includes feature：T0 to t1, t0 extremely
T2, t0 to t3, t0 to the time interval ratio between t4 be 3:4:7:11.Specifically, the method for proceeding by variation shift from t0
Step, therebetween the required specific time determined due to the pressure threshold of the straight-through valve, reversal valve that actually use, valve size
Pressure release speed and determine, the reader for reading this specification can be directed to the characteristics of components that actually uses and determine time interval,
So that it is determined that the concrete numerical value of above-mentioned time interval, but in our preferred embodiments, t0 to t1, t0 to t2, t0 to t3,
T0 to the time interval ratio between t4 be 3:4:7:11, i.e. stage t0 to t1, t1 to t2, t2 to t3, t3 to the time between t4
Interval is than being 3:1:3:4.By above-mentioned flow we it can be appreciated that be used as preferred embodiment, when only will be preferred
Between interval be suitable for this method, shifting system can be made to have rational time to carry out a gear pressure reduction, light in clutch
Switching reversal valve, two gear pressure follow up and in time carry out a systems such as torque transfer, the follow-up of straight-through valve pressure when degree contact
Row operation so that the power output that user experiences both will not escape, will not have strong impact sense, reach promoted occupant
There is enough power outputs again while comfort, there is good practical function.
Negative torque downshift process is following (see Fig. 5)：TCU judge accelerator open degree, brake aperture, gearbox output rotating speed, when
The signals such as preceding gear reach preset value, into negative torque downshift pattern.Wherein, A is first clutch access, is worth when being 1 to open
It opens；B is second clutch access, and it is unlatching to be worth when being 1；C is straight-through valve state, and 1 unlatching, percentage is duty ratio；T is
Motor output torque value；N is motor speed.Shift steps are as follows：(1), the t0 moment enters shift mode, and reversal valve is set a gear
Working position, that is, the access for being connected to the second cylinder are closed, and the access of the first cylinder of connection is opened, and straight-through valve is set low level, the
Two clutch control pressure C2 rapid decreases, driving motor constant torque are the first preset value, delay to t1；(2), the t1 moment will
Straight-through valve sets high level, first clutch control pressure C1 rapid increases, delay to t2；(3), the t2 moment, to straight-through valve PWM into
Row pulse width is modulated, and first clutch control pressure C1 slowly rises, and first clutch, second clutch realize that torque is handed over
It changes, delay to t3；(4) straight-through valve is set low level by the t3 moment, and first clutch control pressure C1 is constant, and setting torque is the
Two preset values, motor speed rapid decrease, the reception of TCU control units judge that tach signal n reaches third preset value, realize rotating speed
It exchanges, then enters next stage；(5), straight-through valve is set high level by the t4 moment, and torque is set as gas pedal value, and at this time first
Clutch control pressure C1 rapid increases, driving motor torque rise to work preset value, and shift terminates.
In some specific embodiments, the first preset value in upper example step can be 0Nm, 10Nm, 20Nm etc.,
Preferably 0Nm is arranged the second preset value at the t3 moment and could be provided as 0Nm, 10Nm or 20Nm, preferably 0Nm, judgment step
When judging that tach signal n reaches third preset value, 2200r/min, 2400r/min or 2600r/min can be selected, preferably
2400r/min.Duty ratio when carrying out pulse width modulation to straight-through valve could be provided as 20%.Above-described embodiment can be more
It carries out well carrying out smooth transition between second clutch, first clutch, reach comfortably without interruption, the effect without crash change of speed
Fruit.By changing above-mentioned preset value, adjust torque, the rotating speed of different moments, between the gear that electric vehicle can be different into
Row switching, such as be equivalent to four gears drop, three gear, three gear drops, two gear, two gear drops, one gear etc..
In order to which the function of pneumatic pure electric vehicle shifting system is better achieved, this method further includes feature：T0 to t1, t0 extremely
T2, t0 to t3, t0 to the time interval ratio between t4 be 3:4:7:11.Specifically, the method for proceeding by variation shift from t0
Step, therebetween the required specific time determined due to the pressure threshold of the straight-through valve, reversal valve that actually use, valve size
Pressure release speed and determine, the reader for reading this specification can be directed to the characteristics of components that actually uses and determine time interval,
So that it is determined that the concrete numerical value of above-mentioned time interval, but in our preferred embodiments, t0 to t1, t0 to t2, t0 to t3,
T0 to the time interval ratio between t4 be 3:4:7:11, i.e. stage t0 to t1, t1 to t2, t2 to t3, t3 to the time between t4
Interval is than being 3:1:3:4.By above-mentioned flow we it can be appreciated that be used as preferred embodiment, we can be with from Fig. 4
See, preferred time interval is only suitable for this method, shifting system can be made to have the rational time to carry out two gears
Pressure reduction, when clutch gentle contact switch reversal valve, one gear pressure follow up and in time carry out torque transfer,
The sequence of operations such as straight-through valve pressure follow-up so that the power output that user experiences both will not escape, will not have strong
Impact sense, reach has enough power outputs again while promoting occupant comfort, with good practical function.
Positive torque downshift process is following (see Fig. 7)：TCU judge accelerator open degree, brake aperture, gearbox output rotating speed, when
The signals such as preceding gear reach preset value, into positive torque downshift pattern.Wherein, A is first clutch access, is worth when being 1 to open
It opens；B is second clutch access, and it is unlatching to be worth when being 1；C is straight-through valve state, and 1 unlatching, percentage is duty ratio；T is
Motor output torque value；N is motor speed.Shift includes the following steps：(1), the t0 moment enters positive torque downshift pattern, will change
A gear working position is set to valve, that is, the access for being connected to the second cylinder is closed, and the access of the first cylinder of connection is opened, then straight-through valve is set
Low level, second clutch control pressure C2 rapid decreases, driving motor constant torque are gas pedal value at this time, and delay is extremely
t1；(2), straight-through valve is set high level, first clutch control pressure C1 rapid increases by the t1 moment, and driving motor torque rises
To the first preset value, control unit reception judges that gearbox output tach signal reaches the second preset value, then delay to t2 enters
Otherwise next stage does not enter.(3), the t2 moment, to straight-through valve pwm pulse width modulated, first clutch control pressure C1
Slowly rise, driving motor constant torque is third preset value, then first clutch, second clutch realize that rotating speed is handed at this time
It changes, and is delayed to t3；(4) straight-through valve is set low level by the t3 moment, and first clutch control pressure C1 is constant, reduces driving electricity
Machine torque to the 4th preset value, at this time motor speed slowly declines, and it is default that TCU receptions judge whether tach signal reaches the 5th
Value is then to enter next stage；(5), the t4 moment carries out pulse width modulation, first clutch control pressure to straight-through valve PWM
C1 slowly rises, and driving motor torque rises to the 6th preset value, delay to t5；(6), straight-through valve is set high level by the t5 moment,
First clutch control pressure C1 rapid increases, shift terminate.
In some specific embodiments, the first preset value in upper example step can be 80Nm, 100Nm, 120Nm etc.
Deng, preferably 100Nm, tach signal could be provided as 1600r/min, 1800r/min or 2000r/min up to the second preset value,
Preferably 1800r/min；Third preset value can be 300Nm, 400Nm, 500Nm etc., preferably 400Nm, the 4th preset value
Can be 80Nm, 100Nm, 120Nm etc., preferably 100Nm.5th preset value could be provided as 2200r/min, 2400r/
Min or 2600r/min, preferably 2400r/min.6th preset value could be provided as gas pedal value.It is carried out to straight-through valve
Duty ratio when pulse width is modulated could be provided as 20%.Above-described embodiment can be carried out preferably in second clutch,
Smooth transition is carried out between one clutch, is achieved the effect that comfortably without interruption, without crash change of speed.By changing above-mentioned preset
Value, adjusts torque, the rotating speed of different moments, is switched between the gear that electric vehicle can be different, such as be equivalent to four gears
Three gear of drop, three gear drops, two gear, two gear drops, one gear etc..
In order to which the function of pneumatic pure electric vehicle shifting system is better achieved, this method further includes feature：T0 to t1, t0 extremely
T2, t0 to t3, t0 to the time interval ratio between t4, t0 to t5 be 3:4:7:13:17.Specifically, variation is proceeded by from t0
The method and step of shift, therebetween pressure threshold, valve of the required specific time due to the straight-through valve, reversal valve that actually use
Pressure release speed that size determines and determine, the reader for reading this specification can be directed to the characteristics of components that actually uses and determine
Time interval, so that it is determined that the concrete numerical value of above-mentioned time interval, but in our preferred embodiments, t0 to t1, t0 is extremely
T2, t0 to t3, t0 to the time interval ratio between t4 be 3:4:7:13:17, i.e. stage t0 to t1, t1 to t2, t2 to t3, t3
To t4, t4 to the time interval ratio between t5 be 3:1:3:6:4.By above-mentioned flow we it can be appreciated that being used as preferred
Embodiment, as can be seen from Figure 6：Preferred time interval is only suitable for this method, can make shifting system
Having the rational time to carry out, two gear pressure reductions, switching reversal valve, a gear pressure follow up, simultaneously when clutch gentle contact
In time carry out the sequence of operations such as torque transfer, the follow-up of straight-through valve pressure so that the power output that user experiences both will not
Escape will not have strong impact sense, and reach has enough power outputs again while promoting occupant comfort, have
Good practical function.
The TCU of the present invention judges shift mode by throttle, brake opening amount signal, output tach signal.Shift is calculated to patrol
Collect instruction.
Pneumatic control circuit, hydraulic control circuit can be used in the pressure control loop of the present invention.
The 3 position-5 way valve of the present invention executes gear selection instruction, 2/2-way straight-through valve as block selecting solenoid valve
As shift process control valve, control clutch combines.
Beneficial effects of the present invention：This patent controls driving motor, pressure control loop by a kind of TCU control logics,
Control shift clutch, may be implemented pure electric vehicle automatic gear-box it is unpowered, without impact self shifter, power failure-free, Wu Chong
The comfort that shift improves vehicle is hit, the service life of gearbox is extended.
Example the above is only the implementation of the present invention is not intended to limit the scope of patent protection of the present invention, every utilization
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (9)
1. a kind of positive torque downshift method, the electric vehicle that this method is suitable at least two clutches of control unit control is pneumatic
Shifting system, which is characterized in that including step, enter positive torque downshift pattern in zero moment, be closed reversal valve and be connected to the second gas
The access of cylinder, opens the access of the first cylinder of connection, then straight-through valve is set low level, and driving motor constant torque is stepped on for throttle
Plate value；Straight-through valve is set into high level in the first predetermined time, driving motor torque is risen into the first preset value, control unit connects
Receipts judge that gearbox output tach signal reaches the second preset value, then enter next stage, otherwise do not enter；Second it is default when
It carves, is third preset value by driving motor constant torque to straight-through valve pwm pulse width modulated；Third predetermined time will be led directly to
Valve sets low level, reduces driving motor torque to the 4th preset value, control unit reception judges whether tach signal reaches the 5th
Preset value is then to enter next stage；4th predetermined time carries out pulse width modulation, driving motor torque to straight-through valve PWM
Rise to the 6th preset value；Straight-through valve is set high level by the 5th predetermined time, and shift terminates.
2. positive torque downshift method according to claim 1, which is characterized in that first preset value is 80-120Nm.
3. positive torque downshift method according to claim 1, which is characterized in that second preset value is 1600r/min-
200r/min, preferably 1800r/min.
4. positive torque downshift method according to claim 1, which is characterized in that the third preset value is 300Nm-
500Nm。
5. positive torque downshift method according to claim 1, which is characterized in that the 4th preset value is 80Nm-
120Nm。
6. positive torque downshift method according to claim 1, which is characterized in that the 5th preset value is set as 2200r/
min-2600r/min。
7. positive torque downshift method according to claim 1, which is characterized in that the 6th preset value is gas pedal
Value.
8. positive torque downshift method according to claim 1, which is characterized in that when carrying out pulse width modulation to straight-through valve
Duty ratio be set as 20%.
9. positive torque downshift method according to claim 1, which is characterized in that the zero moment, the first predetermined time,
Time interval between two predetermined times, third predetermined time, the 4th predetermined time, the 5th predetermined time is 3:1:3:6:4.
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| CN201710411447.1A CN108302193B (en) | 2017-05-25 | 2017-05-25 | Positive torque downshift method |
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| CN103895640A (en) * | 2014-02-26 | 2014-07-02 | 南京越博汽车电子有限公司 | AMT gear control method of hybrid power automobiles |
| US20160290497A1 (en) * | 2015-03-31 | 2016-10-06 | Honda Motor Co., Ltd. | Twin-clutch transmission |
| CN204985686U (en) * | 2015-07-27 | 2016-01-20 | 安徽江淮汽车股份有限公司 | A hydraulic control system for hybrid double clutch automatic transmission |
| CN106594265A (en) * | 2016-11-25 | 2017-04-26 | 浙江吉利控股集团有限公司 | Control device and control method of manual transmission clutch |
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