CN110077408A - A kind of control method of automatic block vehicle intelligence downshift - Google Patents
A kind of control method of automatic block vehicle intelligence downshift Download PDFInfo
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- CN110077408A CN110077408A CN201910228237.8A CN201910228237A CN110077408A CN 110077408 A CN110077408 A CN 110077408A CN 201910228237 A CN201910228237 A CN 201910228237A CN 110077408 A CN110077408 A CN 110077408A
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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
- B60W10/02—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
- 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
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/19—Improvement of gear change, e.g. by synchronisation or smoothing gear shift
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/20—Reducing vibrations in the driveline
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
- B60W30/18—Propelling the vehicle
- B60W30/20—Reducing vibrations in the driveline
- B60W2030/203—Reducing vibrations in the driveline related or induced by the clutch
-
- 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
- B60W2710/027—Clutch torque
-
- 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
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
Abstract
The present invention relates to technical field of vehicle, more particularly to a kind of control method of automatic block vehicle intelligence downshift, including TCU unit, EMS unit, engine, first clutch and second clutch, torque needed for torque needed for TCU unit first calculates engine according to vehicle sliding fact and clutch, control clutch moment of torque is integrated to target position, TCU unit proposes engine torque request to EMS unit simultaneously, EMS unit controls engine according to torque request and exports corresponding engine torque, TCU unit passes through the first stage respectively, second stage and these three periods of phase III calculate clutch moment of torque and engine torque, so that engine torque cooperates in real time with clutch moment of torque during downshift, and then so that vehicle is slided downshift and smoothly pass through, improve the comfortable of driver and passenger Sense.
Description
Technical field
The present invention relates to technical field of vehicle, and in particular to a kind of control method of automatic block vehicle intelligence downshift.
Background technique
Sliding downshift is the common operating condition of double-clutch speed changer, but if engine torque controls improper or clutch
Device moment of torsion control is improper, will lead to pause and transition in rhythm or melody, influences the driving experience of driver and experiencing by bus for passenger.It therefore, is drop
Low sense of jolting need to make vehicle carry out downshift processing, and this is a more complicated process, involves engine torque and speed change
The matching of device clutch moment of torque will lead to pause and transition in rhythm or melody if downshift method is not right, influence to experience by bus.And the prior art from
The linking of each period of dynamic gear Vehicular intelligent downshift is not good enough, causes vehicle that can't smoothly travel enough.
Summary of the invention
For the prior art there are above-mentioned technical problem, the present invention provides a kind of controlling party of automatic block vehicle intelligence downshift
Method, the control method can adjust engine torque and clutch moment of torque in real time, enable smoothly to travel when vehicle downshift.
To achieve the above object, the present invention the following technical schemes are provided:
A kind of control method of automatic block vehicle intelligence downshift, including TCU unit, EMS unit, engine, first are provided
Clutch and second clutch, torque needed for the TCU unit first calculates engine according to vehicle sliding fact and clutch institute
Torque is needed, TCU unit control clutch moment of torque is integrated to target position, and TCU unit proposes engine torque to EMS unit simultaneously
Request, EMS unit control engine according to torque request and export corresponding engine torque, engine torque and clutch moment of torque
Calculating steps are as follows:
A, when being down to odd number gear by even number gear, since engine speed and second clutch revolving speed are in synchronous regime,
First calculate second clutch torque, including following calculating step:
1) before time point a and including time point a, second clutch torque and engine torque the first stage: are calculated
2) second stage: being critical point between time point a and time point b and including time point b, time point b
In this stage, engine speed is asynchronous with first clutch revolving speed, engine speed and second clutch revolving speed
It keeps synchronizing, and this stage is at the process that second clutch torque is switched to first clutch torque, and time point a is
Starting point, time point b end point,
I) when for time point b, since time point b is crash time point, second clutch is completely disengaged at this time, and first closes
Engine torque is completely taken over from device, and second clutch revolving speed is still consistent with engine speed, therefore, calculates first
Clutch moment of torque and engine torque；
Ii) during a is switched to time point b from time point, the combination speed of first clutch, TCU are controlled
It during unit active control first clutch torque needs to coordinate at any time that torque is started to cooperate with it, at this point, second clutch
Torque cannot combine very few, it is necessary to keep certain torque, it is discontinuous otherwise to generate acceleration, and consider engine response
Speed factor, this stage second clutch torque will be matched with engine torque, it is necessary to and combine speed to combine according to suitable, the
Two clutches maintain certain torque trend in separate type, second clutch torque and engine torque are calculated, at this point, TCU
Unit is according to calculated value Real time request engine torque；
3) phase III: being critical point between time point b and time point c and including time point c, time point c, engine is turned round
Square is taken over by first clutch completely, and first clutch torque need to keep first clutch to pass for the acceleration dwv/dt that preserves value
Torque delivery is constant, and engine speed will gradually be synchronized to first clutch revolving speed up at this time；
I) as time point c, since time point c is crash time point, first clutch revolving speed or and engine speed
It is synchronous, calculate first clutch torque and engine torque；
Ii) during b is switched to time point c from time point, keep first clutch torque constant, but for engine
Revolving speed is synchronous with first clutch revolving speed, needs to improve engine torque, can demarcate an engine target rotating speed song at this time
Line is achieved the goal by request control engine torque, but must be controlled engine torque and be turned from time point b to time point c, this
When three phases complete, there is specific control method in each stage, controlled according to the above-mentioned stage, and vehicle slides downshift i.e.
Can smoothly it pass through；
B, when being down to even number gear by odd number gear, since engine speed and second clutch revolving speed are in synchronous regime,
First calculate second clutch torque, including following calculating step:
1) before time point a and including time point a, first clutch torque and engine torque the first stage: are calculated
2) second stage: being critical point between time point a and time point b and including time point b, time point b
In this stage, engine speed is asynchronous with second clutch revolving speed, engine speed and first clutch revolving speed
It keeps synchronizing, and this stage is at the process that second clutch torque is switched to first clutch torque, and time point a is
Starting point, time point b end point,
I) when for time point b, since time point b is crash time point, first clutch is completely disengaged at this time, and second closes
Engine torque is completely taken over from device, and first clutch revolving speed is still consistent with engine speed, therefore calculates second
Clutch moment of torque and engine torque；
Ii) during a is switched to time point b from time point, the combination speed of second clutch, TCU are controlled
It during unit active control second clutch torque needs to coordinate at any time that torque is started to cooperate with it, at this point, first clutch
Torque cannot combine very few, it is necessary to keep certain torque, it is discontinuous otherwise to generate acceleration, and consider engine response
Speed factor, this stage first clutch torque will be matched with engine torque, it is necessary to and combine speed to combine according to suitable, the
One clutch maintains certain torque trend in separate type, first clutch torque and engine torque is calculated, at this point, TCU
Unit is according to calculated value Real time request engine torque；
3) phase III: being critical point between time point b and time point c and including time point c, time point c, engine is turned round
Square is taken over by second clutch completely, and second clutch torque need to keep second clutch to pass for the acceleration dwv/dt that preserves value
Torque delivery is constant, and engine speed will gradually be synchronized to second clutch revolving speed up at this time,
I) as time point c, since time point c is crash time point, second clutch revolving speed or and engine speed
It is synchronous, calculate second clutch torque and engine torque；
Ii) during b is switched to time point c from time point, keep second clutch torque constant, but for engine
Revolving speed is synchronous with second clutch revolving speed, needs to improve engine torque, can demarcate an engine target rotating speed song at this time
Line is achieved the goal by request control engine torque, but must be controlled engine torque and be turned from time point b to time point c, this
When three phases complete, there is specific control method in each stage, controlled according to the above-mentioned stage, and vehicle slides downshift i.e.
Can smoothly it pass through；
Wherein, A, when being down to odd number gear by even number gear, including following calculating step:
1) before time point a and including time point a, second clutch torque and engine torque the first stage: are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2:
Reckoning process:
By i2*Tc2-Tr=Jv*dwv/dt,
Obtain Tc2=(Jv*dwv/dt+Tr)/i2, the calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i2
+ Je*i2*dwv/dt:
Reckoning process:
By Te-Tc2=Je*dwe/dt and dwe/dt=i2*dwv/dt
Obtain Te=Tc2+Je*i2*dwv/dt=(Jv*dwv/dt+Tr)/i2+Je*i2*dwv/dt,
2) second stage: being critical point between time point a and time point b and including time point b, time point b
I) when for time point b, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1；
Reckoning process: by i1*Tc1-Tr=Jv*dwv/dt,
Obtain Tc1=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+i2*Je*dwv/dt,
Reckoning process:
By Te-Tc1=Je*dwe/dt and dwe/dt=i2*dwv/dt
Obtain Te=Tc1+Je*dwe/dt=(Jv*dwv/dt+Tr)/i1+i2*Je*dwv/dt；
Ii) during a is switched to time point b from time point, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr-i1*Tc1)/i2,
Reckoning process,
By i2*Tc2+i1*Tc1-Tr=Jv*dwv/dt
Obtain Tc2=(Jv*dwv/dt+Tr-i1*Tc1)/i2；
The calculating formula of engine torque: Te=Je*i2*dwv/dt+Tc1+ (Jv*dwv/dt+Tr-i1*Tc1)/i2,
By Te-Tc2-Tc1=Je*dwe/dt and dwe/dt=i2*dwv/dt
Obtain Te=Je*dwe/dt+Tc1+Tc2
=Je*i2*dwv/dt+Tc1+ (Jv*dwv/dt+Tr-i1*Tc1)/i2
Wherein, Tc1, the Tc2 in this stage are obtained by above-mentioned calculating, respectively known quantity,
3) phase III: being critical point between time point b and time point c and including time point c, time point c
I) as time point c, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1；
Reckoning process: by i1*Tc1-Tr=Jv*dwv/dt,
Obtain Tc1=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt,
Reckoning process:
By Te-Tc1=Je*dwe/dt and dwe/dt=i1*dwv/dt
Obtain Te=Tc1+Je*i1*dwv/dt=(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt；
Ii it) during b is switched to time point c from time point, keeps first clutch torque constant, and controls engine
Te=(Jv*dwv/dt+ of the torque from Te=(Jv*dwv/dt+Tr)/i1+i2*Je*dwv/dt to time point c of time point b
Tr)/i1+Je*i1*dwv/dt。
In above-mentioned all calculating process, Te is engine torque；Tc1 is first clutch torque；Tc2 is the second clutch
Device torque；Je is engine inertia；Jv is vehicle inertia；Dwe/dt is engine acceleration；Dwv/dt is vehicle acceleration, i2
Gear transmission ratio is kept off for even number；I1 is even number gear gear transmission ratio；Tr is vehicle resistance, and Jv, i2, i2, Tr, dwv/dt, Je are
Known quantity.
Wherein, B, when being down to even number gear by odd number gear, including following calculating step:
1) before time point a and including time point a, first clutch torque and engine torque the first stage: are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1:
Reckoning process:
By i1*Tc1-Tr=Jv*dwv/dt,
Obtain Tc1=(Jv*dwv/dt+Tr)/i1, the calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1
+ Je*i1*dwv/dt:
Reckoning process:
By Te-Tc1=Je*dwe/dt and dwe/dt=i1*dwv/dt
Obtain Te=Tc1+Je*i1*dwv/dt=(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt,
2) second stage: being critical point between time point a and time point b and including time point b, time point b
I) when for time point b, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
Reckoning process: by i2*Tc2-Tr=Jv*dwv/dt,
Obtain Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i2+i1*Je*dwv/dt,
Reckoning process:
By Te-Tc2=Je*dwe/dt and dwe/dt=i1*dwv/dt
Obtain Te=Tc2+Je*dwe/dt=(Jv*dwv/dt+Tr)/i2+i1*Je*dwv/dt；
Ii) during a is switched to time point b from time point, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr-i2*Tc1)/i1,
Reckoning process,
By i1*Tc1+i2*Tc2-Tr=Jv*dwv/dt
Obtain Tc1=(Jv*dwv/dt+Tr-i2*Tc1)/i1；
The calculating formula of engine torque: Te=Je*i1*dwv/dt+Tc2+ (Jv*dwv/dt+Tr-i2*Tc2)/i1,
By Te-Tc1-Tc2=Je*dwe/dt and dwe/dt=i1*dwv/dt
Obtain Te=Je*dwe/dt+Tc2+Tc1
=Je*i1*dwv/dt+Tc2+ (Jv*dwv/dt+Tr-i2*Tc2)/i1
Wherein, Tc1, the Tc2 in this stage are obtained by above-mentioned calculating, respectively known quantity,
3) phase III: being critical point between time point b and time point c and including time point c, time point c
I) as time point c, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
Reckoning process: by i2*Tc2-Tr=Jv*dwv/dt,
Obtain Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i2+Je*i2*dwv/dt,
Reckoning process:
By Te-Tc2=Je*dwe/dt and dwe/dt=i2*dwv/dt
Obtain Te=Tc2+Je*i2*dwv/dt=(Jv*dwv/dt+Tr)/i2+Je*i2*dwv/dt；
Ii it) during b is switched to time point c from time point, keeps first clutch torque constant, and controls engine
Te=(Jv*dwv/dt+ of the torque from Te=(Jv*dwv/dt+Tr)/i2+i1*Je*dwv/dt to time point c of time point b
Tr)/i2+Je*i2*dwv/dt。
In above-mentioned all calculating process, Te is engine torque；Tc1 is first clutch torque；Tc2 is the second clutch
Device torque；Je is engine inertia；Jv is vehicle inertia；Dwe/dt is engine acceleration；Dwv/dt is vehicle acceleration, i2
Gear transmission ratio is kept off for even number；I1 is even number gear gear transmission ratio；Tr is vehicle resistance, and Jv, i2, i2, Tr, dwv/dt, Je are
Known quantity.
Beneficial effects of the present invention:
Torque needed for torque needed for TCU unit first calculates engine according to vehicle sliding fact and clutch, TCU unit control
Clutch moment of torque processed is integrated to target position, and TCU unit proposes engine torque request to EMS unit simultaneously, EMS unit according to
Torque request controls engine and exports corresponding engine torque, and TCU unit passes through first stage, second stage and third respectively
These three periods in stage calculate clutch moment of torque and engine torque, so that engine torque and clutch during downshift
Torque cooperates in real time, and then so that vehicle is slided downshift and smoothly pass through, and improves the comfort of driver and passenger.
Detailed description of the invention
Fig. 1 is that the signal for the working condition that 4 gears of embodiment 1 reduce the clutch of 3 gears is intended to.
Fig. 2 is that the signal for the working condition that 3 gears of embodiment 1 reduce the clutch of 2 gears is intended to.
Specific embodiment
Below in conjunction with specific embodiments and drawings, the present invention is described in detail.
Embodiment 1
A kind of control method of the automatic block vehicle intelligence downshift of the present embodiment, including TCU unit, EMS unit, start
Machine, first clutch and second clutch, torque needed for the TCU unit first calculates engine according to vehicle sliding fact and from
Torque needed for clutch, TCU unit control clutch moment of torque are integrated to target position, and TCU unit starts to the proposition of EMS unit simultaneously
Machine torque request, EMS unit control engine according to torque request and export corresponding engine torque, engine torque and clutch
Steps are as follows for the calculating of device torque:
When being down to 3 gear by 4 gears, TCU unit includes following calculating step:
1) before time point a and including time point a, second clutch torque and engine torque the first stage: are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i2+Je*i2*dwv/dt；
2) second stage: being critical point between time point a and time point b and including time point b, time point b
I) when for time point b, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+i2*Je*dwv/dt；
Ii) during a is switched to time point b from time point, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr-i1*Tc1)/i2；
The calculating formula of engine torque: Te=Je*i2*dwv/dt+Tc1+ (Jv*dwv/dt+Tr-i1*Tc1)/i2；
3) phase III: being critical point between time point b and time point c and including time point c, time point c
I) as time point c, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt；
Ii it) during b is switched to time point c from time point, keeps first clutch torque constant, and controls time point
Engine torque Te=(Jv*dwv/dt+Tr)/i1+i2*Je*dwv/dt of b goes to the engine torque Te=of time point c
(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt,
Wherein, Te is engine torque；Tc1 is first clutch torque；Tc2 is second clutch torque；Je is to start
Machine inertia；Jv is vehicle inertia；Dwe/dt is engine acceleration；Dwv/dt is vehicle acceleration, and i2 is that even number keeps off transmission ratio；
I1 is that even number keeps off transmission ratio；Tr is vehicle resistance, and Jv, i2, i2, Tr, dwv/dt, Je are known quantity.
The explanation of Fig. 1:
When Fig. 1 is that 4 gears are down to 3 gear, the working state figure of clutch, shown in Fig. 1, before (1) time point a, when front is 4
It keeps off, not yet downshift, therefore first clutch torque and second clutch torque are when front is set, at this point, second clutch
Positive adapter tube 4 is kept off, and therefore, second clutch torque is located at first clutch torque top, and first clutch revolving speed and second from
The synchronous trend declined to keep reduction of speed of clutch revolving speed；
(2) time point a to time b is the process and the second clutch that second clutch torque is switched to first clutch torque
Device torque is switched to the process of first clutch torque, and therefore, the two generates downward trend and ascendant trend respectively to reach
Required torque；
(3) time point b to time point c is that first clutch completely takes over engine torque, therefore, first clutch torque
Above second clutch torque, and to keep vehicle acceleration constant, thus keep first clutch torque constant.
Embodiment 2
A kind of control method of the automatic block vehicle intelligence downshift of the present embodiment, including TCU unit, EMS unit, start
Machine, first clutch and second clutch, torque needed for the TCU unit first calculates engine according to vehicle sliding fact and from
Torque needed for clutch, TCU unit control clutch moment of torque are integrated to target position, and TCU unit starts to the proposition of EMS unit simultaneously
Machine torque request, EMS unit control engine according to torque request and export corresponding engine torque, engine torque and clutch
Steps are as follows for the calculating of device torque:
When being down to 2 gear by 3 gears, TCU unit includes following calculating step:
When being down to even number gear by odd number gear, including following calculating step:
1) before time point a and including time point a, first clutch torque and engine torque the first stage: are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt；
2) second stage: being critical point between time point a and time point b and including time point b, time point b
I) when for time point b, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr/i2+i1*Je*dwv/dt；
Ii) during a is switched to time point b from time point, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr-i2*Tc2)/i1；
The calculating formula of engine torque: Te=Je*i1*dwv/dt+Tc2+ (Jv*dwv/dt+Tr-i2*Tc2)/i1；
3) phase III: being critical point between time point b and time point c and including time point c, time point c
I) as time point c, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i2+Je*i2*dwv/dt；
Ii it) during b is switched to time point c from time point, keeps second clutch torque constant, and controls time point
The engine torque of b goes to the engine torque of time point c,
Wherein, Te is engine torque；Tc1 is first clutch torque；Tc2 is second clutch torque；Je is to start
Machine inertia；Jv is vehicle inertia；Dwe/dt is engine acceleration；Dwv/dt is vehicle acceleration, and i2 is that even number keeps off transmission ratio；
I1 is that even number keeps off transmission ratio；Tr is vehicle resistance, and Jv, i2, i2, Tr, dwv/dt, Je are known quantity.
The explanation of Fig. 2:
When Fig. 2 is that 3 gears are down to 2 gear, the working state figure of clutch, shown in Fig. 2, before (1) time point a, when front is 3
It keeps off, not yet downshift, therefore first clutch torque and second clutch torque are when front is set, at this point, first clutch
Positive adapter tube 4 is kept off, and therefore, first clutch torque is located at second clutch torque top, and second clutch revolving speed and first from
The synchronous trend declined to keep reduction of speed of clutch revolving speed；
(2) time point a to time b is the process and the first clutch that first clutch torque is switched to second clutch torque
Device torque is switched to the process of second clutch torque, and therefore, the two generates downward trend and ascendant trend respectively to reach
Required torque；
(3) time point b to time point c is that second clutch completely takes over engine torque, therefore, second clutch torque
Above first clutch torque, and to keep vehicle acceleration constant, thus keep second clutch torque constant.
Embodiment 3
A kind of control method of automatic block vehicle intelligence downshift of the s of the present embodiment, including TCU unit, EMS unit, start
Machine, first clutch and second clutch, torque needed for the TCU unit first calculates engine according to vehicle sliding fact and from
Torque needed for clutch, TCU unit control clutch moment of torque are integrated to target position, and TCU unit starts to the proposition of EMS unit simultaneously
Machine torque request, EMS unit control engine according to torque request and export corresponding engine torque, engine torque and clutch
Steps are as follows for the calculating of device torque:
When being down to 1 gear by 2 gears, TCU unit includes following calculating step:
1) before time point a and including time point a, second clutch torque and engine torque the first stage: are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i2+Je*i2*dwv/dt；
2) second stage: being critical point between time point a and time point b and including time point b, time point b
I) when for time point b, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+i2*Je*dwv/dt；
Ii) during a is switched to time point b from time point, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr-i1*Tc1)/i2；
The calculating formula of engine torque: Te=Je*i2*dwv/dt+Tc1+ (Jv*dwv/dt+Tr-i1*Tc1)/i2；
3) phase III: being critical point between time point b and time point c and including time point c, time point c
I) as time point c, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt；
Ii it) during b is switched to time point c from time point, keeps first clutch torque constant, and controls time point
Engine torque Te=(Jv*dwv/dt+Tr)/i1+i2*Je*dwv/dt of b goes to the engine torque Te=of time point c
(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt,
Wherein, Te is engine torque；Tc1 is first clutch torque；Tc2 is second clutch torque；Je is to start
Machine inertia；Jv is vehicle inertia；Dwe/dt is engine acceleration；Dwv/dt is vehicle acceleration, and i2 is that even number keeps off transmission ratio；
I1 is that even number keeps off transmission ratio；Tr is vehicle resistance, and Jv, i2, i2, Tr, dwv/dt, Je are known quantity.
Embodiment 4
A kind of control method of the automatic block vehicle intelligence downshift of the present embodiment, including TCU unit, EMS unit, start
Machine, first clutch and second clutch, torque needed for the TCU unit first calculates engine according to vehicle sliding fact and from
Torque needed for clutch, TCU unit control clutch moment of torque are integrated to target position, and TCU unit starts to the proposition of EMS unit simultaneously
Machine torque request, EMS unit control engine according to torque request and export corresponding engine torque, engine torque and clutch
Steps are as follows for the calculating of device torque:
When being down to 4 gear by 5 gears, TCU unit includes following calculating step:
1) before time point a and including time point a, first clutch torque and engine torque the first stage: are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt；
2) second stage: being critical point between time point a and time point b and including time point b, time point b
I) when for time point b, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr/i2+i1*Je*dwv/dt；
Ii) during a is switched to time point b from time point, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr-i2*Tc2)/i1；
The calculating formula of engine torque: Te=Je*i1*dwv/dt+Tc2+ (Jv*dwv/dt+Tr-i2*Tc2)/i1；
3) phase III: being critical point between time point b and time point c and including time point c, time point c
I) as time point c, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i2+Je*i2*dwv/dt；
Ii it) during b is switched to time point c from time point, keeps second clutch torque constant, and controls time point
The engine torque of b goes to the engine torque of time point c,
Wherein, Te is engine torque；Tc1 is first clutch torque；Tc2 is second clutch torque；Je is to start
Machine inertia；Jv is vehicle inertia；Dwe/dt is engine acceleration；Dwv/dt is vehicle acceleration, and i2 is that even number keeps off transmission ratio；
I1 is that even number keeps off transmission ratio；Tr is vehicle resistance, and Jv, i2, i2, Tr, dwv/dt, Je are known quantity.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those skilled in the art are answered
Work as understanding, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (3)
1. a kind of control method of automatic block vehicle intelligence downshift, it is characterized in that: including TCU unit, EMS unit, engine, the
One clutch and second clutch, torque and clutch needed for the TCU unit first calculates engine according to vehicle sliding fact
Required torque, TCU unit control clutch moment of torque are integrated to target position, and TCU unit proposes that engine is turned round to EMS unit simultaneously
Square request, EMS unit control engine according to torque request and export corresponding engine torque, and engine torque and clutch are turned round
Steps are as follows for the calculating of square:
A, when being down to odd number gear by even number gear, including following calculating step:
1) before time point a and including time point a, second clutch torque and engine torque the first stage: are calculated
2) second stage: being critical point between time point a and time point b and including time point b, time point b
I) when for time point b, first clutch torque and engine torque are calculated；
Ii) during a is switched to time point b from time point, second clutch torque and engine torque are calculated；
3) phase III: being critical point between time point b and time point c and including time point c, time point c
I) when for time point c, first clutch torque and engine torque are calculated；
Ii it) during b is switched to time point c from time point, keeps first clutch torque constant, and controls time point b's
Engine torque goes to the engine torque of time point c；
B, when being down to even number gear by odd number gear, including following calculating step:
1) before time point a and including time point a, first clutch torque and engine torque the first stage: are calculated
2) second stage: being critical point between time point a and time point b and including time point b, time point b
I) when for time point b, second clutch torque and engine torque are calculated；
Ii) during a is switched to time point b from time point, first clutch torque and engine torque are calculated；
3) phase III: being critical point between time point b and time point c and including time point c, time point c
I) as time point c, second clutch torque and engine torque are calculated；
Ii it) during b is switched to time point c from time point, keeps second clutch torque constant, and controls time point b's
Engine torque goes to the engine torque of time point c.
2. a kind of control method of automatic block vehicle intelligence downshift according to claim 1, it is characterized in that:
A, when being down to odd number gear by even number gear, including following calculating step:
1) first stage: before time point a and including time point a, calculate second clutch torque and engine torque second from
The calculating formula of clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i2+Je*i2*dwv/dt；
2) second stage: being critical point between time point a and time point b and including time point b, time point b
I) when for time point b, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+i2*Je*dwv/dt；
Ii) during a is switched to time point b from time point, second clutch torque and the second clutch of engine torque are calculated
The calculating formula of device torque are as follows: Tc2=(Jv*dwv/dt+Tr-i1*Tc1)/i2；
The calculating formula of engine torque: Te=Je*i2*dwv/dt+Tc1+ (Jv*dwv/dt+Tr-i1*Tc1)/i2；
3) phase III: being critical point between time point b and time point c and including time point c, time point c
I) as time point c, the calculating formula of first clutch torque and engine torque first clutch torque is calculated are as follows: Tc1
=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt；
Ii it) during b is switched to time point c from time point, keeps first clutch torque constant, and controls time point b's
Engine torque Te=(Jv*dwv/dt+Tr)/i1+i2*Je*dwv/dt goes to the engine torque Te=(Jv* of time point c
Dwv/dt+Tr)/i1+Je*i1*dwv/dt,
Wherein, Te is engine torque；Tc1 is first clutch torque；Tc2 is second clutch torque；Je is used for engine
Amount；Jv is vehicle inertia；Dwe/dt is engine acceleration；Dwv/dt is vehicle acceleration, and i2 is that even number keeps off transmission ratio；I1 is
Even number keeps off transmission ratio；Tr is vehicle resistance, and Jv, i1, i2, Tr, dwv/dt, Je are known quantity.
3. a kind of control method of automatic block vehicle intelligence downshift according to claim 1, it is characterized in that:
B, when being down to even number gear by odd number gear, including following calculating step:
1) first stage: before time point a and including time point a, calculate first clutch torque and engine torque first from
The calculating formula of clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr)/i1；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i1+Je*i1*dwv/dt；
2) second stage: being critical point between time point a and time point b and including time point b, time point b
I) when for time point b, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr/i2+i1*Je*dwv/dt；
Ii) during a is switched to time point b from time point, first clutch torque and engine torque are calculated
The calculating formula of first clutch torque are as follows: Tc1=(Jv*dwv/dt+Tr-i2*Tc2)/i1；
The calculating formula of engine torque: Te=Je*i1*dwv/dt+Tc2+ (Jv*dwv/dt+Tr-i2*Tc2)/i1；
3) phase III: being critical point between time point b and time point c and including time point c, time point c
I) as time point c, second clutch torque and engine torque are calculated
The calculating formula of second clutch torque are as follows: Tc2=(Jv*dwv/dt+Tr)/i2；
The calculating formula of engine torque are as follows: Te=(Jv*dwv/dt+Tr)/i2+Je*i2*dwv/dt；
Ii it) during b is switched to time point c from time point, keeps second clutch torque constant, and controls time point b's
Engine torque goes to the engine torque of time point c,
Wherein, Te is engine torque；Tc1 is first clutch torque；Tc2 is second clutch torque；Je is used for engine
Amount；Jv is vehicle inertia；Dwe/dt is engine acceleration；Dwv/dt is vehicle acceleration, and i2 is that even number keeps off transmission ratio；I1 is
Even number keeps off transmission ratio；Tr is vehicle resistance, and Jv, i1, i2, Tr, dwv/dt, Je are known quantity.
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| CN114857260B (en) * | 2022-04-27 | 2024-05-03 | 重庆青山工业有限责任公司 | Non-power downshift control method under manual mode of double-clutch transmission |
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