CN107117161B - A kind of positive torque upshift method - Google Patents
A kind of positive torque upshift method Download PDFInfo
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- CN107117161B CN107117161B CN201710380527.5A CN201710380527A CN107117161B CN 107117161 B CN107117161 B CN 107117161B CN 201710380527 A CN201710380527 A CN 201710380527A CN 107117161 B CN107117161 B CN 107117161B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0001—Details of the control system
- B60W2050/0043—Signal treatments, identification of variables or parameters, parameter estimation or state estimation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
- B60W2510/1005—Transmission ratio engaged
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/10—Change speed gearings
- B60W2510/104—Output speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/12—Brake pedal position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/02—Clutches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Human Computer Interaction (AREA)
- Control Of Transmission Device (AREA)
Abstract
The present invention provides a kind of positive torque upshift method, this method is suitable for the electric vehicle straight-air shift system of at least two clutches of control unit control, including step, the access that reversal valve is connected to the second cylinder is opened in zero moment, the access of the first cylinder of closed communicating, straight-through valve is set low into level, driving motor constant torque is set, torque value is gas pedal value；Straight-through valve is set into high level in the first predetermined time, is the first preset value by the torque settings of motor；The pulse width modulation of straight-through valve is carried out in the second predetermined time；Straight-through valve is set low into level in third predetermined time, and the torque for reducing motor judges whether tach signal reaches third preset value, be, start to complete revolving speed exchange to the second preset value, also progress judgment step；Straight-through valve is set into high level in the 4th predetermined time.Solve the problems, such as electric automobile gearshift.
Description
Technical field
The present invention relates to a kind of positive torque of electric car field more particularly to pure electric vehicle Pneumatic shift system upshifts
Method.
Background technique
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 car is simple compared with I. C. engine steam bassinet structure, 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 is higher, and 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 revolving speed critical point, economy is not high；More gear gearboxes are compared
Fixed gear is smaller to the loss of power output, the power output efficiency of motor can be significantly promoted, if one can be matched
The reasonable multi-gear gear-case of ratio coverage, Lai Youhua 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 multi gear position automatic gear-box are just certainly
The technological difficulties of dynamic gearbox.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of positive torque upshift method, solves electric automobile gearshift
Problem.
A kind of method the present invention is implemented as follows: positive torque upshifts, this method are suitable for control unit and control at least
The electric vehicle straight-air shift system of two clutches, including step open the access that reversal valve is connected to the second cylinder in zero moment,
Straight-through valve is set low level, driving motor constant torque is arranged, torque value is gas pedal by the access of the first cylinder of closed communicating
Value；Straight-through valve is set into high level in the first predetermined time, is the first preset value by the torque settings of motor；In the second predetermined time
Carry out the pulse width modulation of straight-through valve；Straight-through valve is set low into level in third predetermined time, and reduces the torque of motor to
Two preset values, also progress judgment step, judge whether tach signal reaches third preset value, are, start to complete revolving speed exchange；
Straight-through valve is set into high level in the 4th predetermined time.
Specifically, first preset value is 300-500Nm.
Specifically, second preset value is 80-120Nm.
Specifically, the third preset value is 1700-2100r/min.
Preferably, the duty ratio when carrying out pulse width modulation to straight-through valve is 20%.
Preferably, the zero moment, the first predetermined time, the second predetermined time, third predetermined time, the 4th predetermined time
Between time interval be 3:1:3:4.
The present invention has the advantage that enable to shifting system have reasonable time carry out one grade of pressure reduction, from
Switch reversal valve when clutch gentle contact, second gear pressure follows up and in time carries out torque transfer, the follow-up of straight-through valve pressure
Equal sequence of operations so that the power output experienced of user both will not escape, will not have strong impact sense, reach and mention
While rising occupant comfort there is enough power outputs again, there is good practical function.
Detailed description of the invention
Fig. 1 is pure electric vehicle amount shifting system schematic diagram of the present invention；
Fig. 2 is that positive torque of the present invention upshift method parameter converts schematic diagram；
Fig. 3 is positive torque of the present invention upshift method flow diagram；
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.
Description of symbols:
1, gas source；
2, filter；
3, straight-through valve；
4, muffler；
5, muffler；
6, reversal valve；
7, the first cylinder；
8, the second cylinder.
Specific embodiment
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 cooperated to be explained in detail.
Referring to Fig. 1, a kind of 2 shift automatic variable speed case shifting system of pure electric vehicle of the present invention, a kind of pure electric vehicle is changed
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 also used to driving motor, straight-through valve, reversal valve output
Control instruction.In some preferred embodiments, shifting system includes TCU (automatic gear-box control unit) first clutch,
Second gear clutch.It also selects 3 position-5 way valve as gear selecting solenoid valve, executes gear selection instruction, also selection 2/2-way
Straight-through valve controls clutch and combines as shift process control valve.System TCU receives throttle, brake opening amount signal, output turn
Fast signal judges shift opportunity, sends shift control signal to driving motor, pressure control loop.Driving motor receives TCU letter
Number, shift operating condition is executed, pressure control loop receives TCU signal, and it executes shift logic and instructs, pusher cylinder lock-up clutch,
Complete shift.Through the above scheme, enabling to electric vehicle has enough power outputs when needing to switch torque, and
Switch torque when will not dynamic output shakiness cause terminal or impact feel the problem of.Wherein: 1, the torque of driving motor demand by
Each gear clutch friction plate torque capacity, which calculates, to be obtained, final to determine after Laboratory Calibration amendment；2, clutch control pressure
Power C1, C2 is shifted gears delay time t (t0~t5), and PWM solenoid valve pulse width control parameter is by solenoid valve CV value (flow system
Number), clutch friction plate free clearance, clutch friction plate torque capacity, the parameters such as cylinder bearing area calculate and obtain, in reality
It is final to determine after testing room calibration amendment.
In some other embodiment, the cylinder is two, ventilates connect with reversal valve respectively.Certainly, cylinder with from
Clutch can be set to multiple groups, meet the needs of multi gear position control.
It further include gas source, filter, the gas 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
Technical effect.
It 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.
It in certain embodiments, further include positive torque upshift method, this method is suitable for two grades of clutches of reversal valve connection
Pneumatic electro vehicle gear change system.The upshift method includes step, and (see Fig. 3): TCU judges accelerator open degree, brake aperture, becomes
The signals such as fast case output revolving speed, current gear reach preset value, into positive torque upshift mode.Wherein, A is logical for first clutch
Road, being worth when being 1 is unlatching；B is second clutch access, and being worth when being 1 is unlatching；C is straight-through valve state, 1 unlatching, percentage
For duty ratio；T is motor output torque value；N is motor speed.Shift process: (1), the t0 moment enter shift mode, walked
Rapid: reversal valve sets second gear working position, that is, the access for being connected to the second cylinder is opened, the access closure of the first cylinder of connection, and will be straight
Port valve sets low level；First clutch controls pressure C1 rapid decrease after above-mentioned steps, and driving motor torque value is arranged at this time
It 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
Pressure C2 rapid increase is controlled, torque value is set as the first preset value, such as 400Nm, delay to t2 at this time；(3), the t2 moment,
Carry out straight-through valve pwm pulse width modulated, duty ratio can be set to 20% at this time, second clutch control pressure C2 it is slow on
It rises, first clutch is slowly detached from this time, can be realized the torque exchange of the first, second clutch immediately, by straight
The shelves that rush that port valve carries out pulse width modulation and can reduce in shift process are felt, the comfort that user drives, this step are improved
It is delayed to t3；(4) the t3 moment carries out step, straight-through valve is set low level, and the pressure C2 of second clutch control at this time is constant, and
The torque for reducing motor can be set to 100Nm, and driving motor provides driving moment, at this time motor speed rapid decrease, TCU
Reception judgment step is carried out, when judging that tach signal n reaches preset value, such as is set as in some preferred embodiments
1900r/min started to complete revolving speed exchange, into next stage；(5), the t4 moment, then step is carried out, straight-through valve is set into high electricity
Flat, second clutch controls pressure C2 rapid increase at this time, and driving motor torque rises to the preset value in figure, and shift terminates.
By above-mentioned design, enable in electric vehicle when using Pneumatic drive system, from figure 2 it can be seen that first from
Clutch is that the boosting and access of second clutch are carried out when finishing pressure release, just may be implemented comfortably without interrupt, it is shock-free
Gear shift operation achievees the effect that promote user's shift experience.
In some specific embodiments, the first preset value in upper example step can be 300Nm, 400Nm, 500Nm, excellent
It is selected as 400Nm, can be set to 80Nm, 100Nm or 120Nm, preferably 100Nm when reducing motor torque at the t3 moment, is judged
For step when judging that tach signal n reaches preset value, preset value can choose 1700r/min, 1900r/min or 2100r/min,
Preferably 1900r/min.Above-described embodiment can preferably carry out carrying out steady mistake between first clutch, second clutch
It crosses, achievees the effect that comfortably without interruption, without crash change of speed.By modifying above-mentioned preset value, adjusts the torque of different moments, turns
Speed switches between the gear that electric car can be different, such as is equivalent to one grade and rises two grades, two grades and rise third gear, third gear liter
Fourth 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 is extremely
T2, t0 to t3, t0 to the time interval ratio between t4 be 3:4:7:11.Specifically, the method for gear shift is changed since t0
Step, therebetween required for the 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 determine time interval for the characteristics of components that actually uses,
So that it is determined that the specific 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 process we it can be appreciated that as preferred embodiment, when only will be preferred
Between interval be suitable for this method, shifting system can be made to have reasonable time to carry out one grade of pressure reduction, light in clutch
Switching reversal valve, second 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
Column operation so that the power output experienced of user both will not escape, will not have strong impact sense, reach and promote occupant
There is enough power outputs again while comfort, there is good practical function.
Negative torque downshift process following (see Fig. 5): TCU judge accelerator open degree, brake aperture, gearbox export revolving speed, when
The signals such as preceding gear reach preset value, into negative torque downshift mode.Wherein, A is first clutch access, is worth for 1 Shi Weikai
It opens；B is second clutch access, and being worth when being 1 is unlatching；C is straight-through valve state, and 1 unlatching, percentage is duty ratio；T is electricity
Machine output torque value；N is motor speed.Shift steps are as follows: (1), the t0 moment enter shift mode, reversal valve is set into a gear work
To make position, that is, is connected to the access closure of the second cylinder, the access of the first cylinder of connection is opened, and straight-through valve is set low level, and second
Clutch control pressure C2 rapid decrease, driving motor constant torque are the first preset value, delay to t1；(2), the t1 moment will be straight
Port valve sets high level, and first clutch controls pressure C1 rapid increase, delay to t2；(3), the t2 moment carries out straight-through valve PWM
Pulse width modulation, first clutch control pressure C1 slowly rise, and first clutch, second clutch realize torque exchange,
It is delayed 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 second pre-
If value, motor speed rapid decrease, TCU control unit reception judges that tach signal n reaches third preset value, realizes that revolving speed is handed over
It changes, then enters next stage；(5), straight-through valve is set high level by the t4 moment, and torque is set as gas pedal value, at this time first from
Clutch controls pressure C1 rapid increase, and driving motor torque rises 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., excellent
It is selected as 0Nm, the second preset value, which is arranged, at the t3 moment can be set to 0Nm, 10Nm or 20Nm, preferably 0Nm, and judgment step is being sentenced
When disconnected tach signal n reaches third preset value, 2200r/min, 2400r/min or 2600r/min can choose, preferably
2400r/min.Duty ratio when carrying out pulse width modulation to straight-through valve can be set to 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 modifying above-mentioned preset value, adjust torque, the revolving speed of different moments, between the gear that electric car can be different into
Row switching, such as be equivalent to fourth gear drop third gear, third gear two grades, two grades one grade of drops of drop 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 is extremely
T2, t0 to t3, t0 to the time interval ratio between t4 be 3:4:7:11.Specifically, the method for gear shift is changed since t0
Step, therebetween required for the 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 determine time interval for the characteristics of components that actually uses,
So that it is determined that the specific 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 process we it can be appreciated that 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 reasonable time to carry out two grades
Pressure reduction, when clutch gentle contact switch reversal valve, one gear pressure follow-up and in time progress torque transfer,
The sequence of operations such as straight-through valve pressure follow-up so that the power output experienced of user both will not escape, will not have strong
Impact sense, reach while promoting occupant comfort has enough power outputs again, with good practical function.
TCU of the 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 pressure control loop of the invention.
3 position-5 way valve of the invention executes gear selection instruction, 2/2-way straight-through valve as gear selecting solenoid valve
As shift process control valve, controls clutch and combine.
Beneficial effects of the present invention: this patent controls driving motor, pressure control loop by a kind of TCU control logic,
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.
The above description is only an embodiment of the present invention, is not intended to limit scope of patent protection of the invention, all utilizations
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 (6)
- A kind of method 1. positive torque upshifts, this method are suitable for the pneumatic electro vehicle of at least two clutches of control unit control Gear change system, including driving motor, pressure control loop；The pressure control loop includes straight-through valve, reversal valve, described 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；It is characterised in that it includes step, reversal valve connection the is opened in zero moment Straight-through valve is set low level, driving motor constant torque is arranged, turned by the access of two cylinders, the access of the first cylinder of closed communicating Square value is gas pedal value；Straight-through valve is set into high level in the first predetermined time, is first pre- by the torque settings of driving motor If value；The pulse width modulation of straight-through valve is carried out in the second predetermined time；Straight-through valve is set low into level in third predetermined time, and The torque of driving motor is reduced to the second preset value, also progress judgment step, judges whether tach signal reaches third preset value, It is to start to complete revolving speed exchange；Straight-through valve is set into high level in the 4th predetermined time.
- The method 2. positive torque according to claim 1 upshifts, which is characterized in that first preset value is 300-500Nm.
- The method 3. positive torque according to claim 1 upshifts, which is characterized in that second preset value is 80-120Nm.
- The method 4. positive torque according to claim 1 upshifts, which is characterized in that the third preset value is 1700- 2100r/min。
- The method 5. positive torque according to claim 1 upshifts, which is characterized in that pulse width modulation is being carried out to straight-through valve When duty ratio be 20%.
- The method 6. positive torque according to claim 1 upshifts, which is characterized in that the zero moment, the first predetermined time, the Two predetermined times, third predetermined time, the time interval between the 4th predetermined time are 3:1:3:4.
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| CN201710380527.5A CN107117161B (en) | 2017-05-25 | 2017-05-25 | A kind of positive torque upshift method |
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| CN201710380527.5A CN107117161B (en) | 2017-05-25 | 2017-05-25 | A kind of positive torque upshift method |
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| CN107117161B true CN107117161B (en) | 2019-04-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2576480B (en) * | 2018-03-26 | 2021-02-10 | Tata Motors European Technical Ct Plc | Control system and method |
| CN111572525B (en) * | 2020-05-28 | 2021-05-04 | 合肥工业大学 | Gear-shifting quality optimization-based power gear-shifting transmission downshift control method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003083428A (en) * | 2001-09-10 | 2003-03-19 | Komatsu Ltd | Fluid pressure control valve device for clutch or brake |
| CN101749420B (en) * | 2008-12-19 | 2014-11-12 | 卡特彼勒（青州）有限公司 | Gear control method of vehicle transmission and corresponding hydraulic control system |
| EP2767738B1 (en) * | 2013-02-19 | 2019-07-17 | Dana Rexroth Transmission Systems S.r.l. | Hydraulic control assembly, transmission with same and method for pre-filling |
| US8965650B1 (en) * | 2013-10-14 | 2015-02-24 | GM Global Technology Operations LLC | System and method for controlling an automatic transmission |
| DE102014226070A1 (en) * | 2014-12-16 | 2016-06-16 | Zf Friedrichshafen Ag | Method for determining a fast filling time |
| CN106499813A (en) * | 2015-09-06 | 2017-03-15 | 林会明 | The Pneumatic shift system of vehicle mechanical gearbox |
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