CN109572668A - Hybrid vehicle and its downshift control method and system - Google Patents
Hybrid vehicle and its downshift control method and system Download PDFInfo
- Publication number
- CN109572668A CN109572668A CN201710911842.6A CN201710911842A CN109572668A CN 109572668 A CN109572668 A CN 109572668A CN 201710911842 A CN201710911842 A CN 201710911842A CN 109572668 A CN109572668 A CN 109572668A
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- Prior art keywords
- clutch
- motor
- engine
- auxiliary
- downshift
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Classifications
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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
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
- B60W20/15—Control strategies specially adapted for achieving a particular effect
Abstract
The invention discloses a kind of hybrid vehicle and its downshift control methods and system, wherein, the hybrid vehicle includes engine, power motor, power battery, double-clutch speed changer, the auxiliary-motor being connected with engine, the downshift control method obtains the duration in inertia phase stage during downshift the following steps are included: when double-clutch speed changer enters downshift process；The target torque of auxiliary-motor is obtained according to the duration in inertia phase stage；The operating of auxiliary-motor positive-torque is controlled according to the target torque of auxiliary-motor, to improve the climbing speed of the revolving speed of engine.The downshift control method of hybrid vehicle according to the present invention, can effectively shorten downshift time of hybrid vehicle, improve the driving experience of user, while additionally aiding the service life for extending clutch in double-clutch speed changer.
Description
Technical field
The present invention relates to Development of HEV Technology field, in particular to the downshift controlling party of a kind of hybrid vehicle
Method, a kind of non-transitorycomputer readable storage medium, a kind of downshift control system of hybrid vehicle and a kind of mixing are dynamic
Power automobile.
Background technique
For double-clutch speed changer in positive-torque downshift, engine speed will rise in the inertia phase section of downshift reaches targeted gear
The corresponding revolving speed in position, this process are next real generally by interacting between the clutch and engine in double-clutch speed changer
Existing, the duration is relatively long, and user generally may feel that power dies down.Also, during the downshift, double clutch speed-changings
The work of slipping of clutch is relatively large in device, thus can accelerate the abrasion of clutch, reduces the service life of clutch.
Summary of the invention
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention
One purpose is to propose a kind of downshift control method of hybrid vehicle, can effectively shorten the downshift of hybrid vehicle
Time, the driving experience of user is improved, while additionally aiding the service life for extending clutch in double-clutch speed changer.
Second object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.
Third object of the present invention is to propose a kind of downshift control system of hybrid vehicle.
Fourth object of the present invention is to propose a kind of hybrid vehicle.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of downshift controlling party of hybrid vehicle
Method, wherein the hybrid vehicle includes engine, power motor, power battery, double-clutch speed changer, starts with described
The connected auxiliary-motor of machine, the engine output power to the vehicle of the hybrid vehicle by the double-clutch speed changer
Wheel, the power motor are used to output driving force to the wheel of the hybrid vehicle, and the power battery is used for described
Power motor power supply, the auxiliary-motor are connected with the power motor and the power battery respectively, and the auxiliary-motor is described
Negative torque operating is under the drive of engine to generate electricity, and the downshift control method is the following steps are included: work as double clutches
When speed changer enters downshift process, the duration in inertia phase stage during the downshift is obtained；According to the inertia phase rank
The duration of section obtains the target torque of the auxiliary-motor；The auxiliary-motor is being controlled just according to the target torque of the auxiliary-motor
Torque operating, to improve the climbing speed of the revolving speed of the engine.
The downshift control method of hybrid vehicle according to an embodiment of the present invention, passes through the downshift in double-clutch speed changer
Control auxiliary-motor applies positive-torque to engine in the process, can effectively shorten downshift time of hybrid vehicle, improves and uses
The driving at family is experienced, while can also reduce the work of slipping of clutch in double-clutch speed changer, helps to extend double clutch speed-changings
The service life of clutch in device.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of non-transitory computer-readable storage medium
Matter is stored thereon with computer program, realizes that first aspect present invention embodiment proposes mixed when which is executed by processor
Close the downshift control method of power vehicle.
Non-transitorycomputer readable storage medium according to an embodiment of the present invention, by the computer journey for executing its storage
Sequence, can effectively shorten downshift time of hybrid vehicle, improve the driving experience of user, while can also reduce double clutches
The work of slipping of clutch in speed changer facilitates the service life for extending clutch in double-clutch speed changer.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of downshift control system of hybrid vehicle
System, wherein the hybrid vehicle includes engine, power motor, power battery, double-clutch speed changer, starts with described
The connected auxiliary-motor of machine, the engine output power to the vehicle of the hybrid vehicle by the double-clutch speed changer
Wheel, the power motor are used to output driving force to the wheel of the hybrid vehicle, and the power battery is used for described
Power motor power supply, the auxiliary-motor are connected with the power motor and the power battery respectively, and the auxiliary-motor is described
To generate electricity, the downshift control system includes: the first acquisition module for negative torque operating under the drive of engine, in institute
When stating double-clutch speed changer and entering downshift process, the duration in inertia phase stage during the downshift is obtained；Second obtains
Module, for obtaining the target torque of the auxiliary-motor according to the duration in the inertia phase stage；Control module is used for root
The auxiliary-motor positive-torque operating is controlled according to the target torque of the auxiliary-motor, to improve the upper raising speed of the revolving speed of the engine
Rate.
The downshift control system of hybrid vehicle according to an embodiment of the present invention, by control module in double clutch speed-changings
Control auxiliary-motor during the downshift of device and apply positive-torque to engine, can effectively shorten hybrid vehicle downshift when
Between, the driving experience of user is improved, while the work of slipping of clutch in double-clutch speed changer can also be reduced, helps to extend double
The service life of clutch in clutch speed changer.
In order to achieve the above objectives, fourth aspect present invention embodiment proposes a kind of hybrid vehicle comprising this hair
The downshift control system for the hybrid vehicle that bright third aspect embodiment proposes.
Hybrid vehicle according to an embodiment of the present invention, can effectively shorten the downshift time, improve the driving body of user
It tests, while the work of slipping of clutch in double-clutch speed changer can also be reduced, help to extend clutch in double-clutch speed changer
Service life.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
It obtains obviously, or by recognizing practice of the invention.
Detailed description of the invention
Fig. 1 is the structural schematic diagram according to the hybrid vehicle of one embodiment of the invention；
Fig. 2 is the structural schematic diagram according to the hybrid vehicle of another embodiment of the present invention；
Fig. 3 is the flow chart according to the downshift control method of the hybrid vehicle of the embodiment of the present invention；
Fig. 4 is to be turned round according to engine speed, clutch rotational speed and clutch during the downshift of one embodiment of the invention
The change curve of square；
Fig. 5 is the block diagram according to the downshift control system of the hybrid vehicle of the embodiment of the present invention；
Fig. 6 is the block diagram according to the hybrid vehicle of the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In one embodiment of the invention, as depicted in figs. 1 and 2, hybrid vehicle may include engine 1, power
Motor 2, power battery 3, double-clutch speed changer 4, the auxiliary-motor 5 being connected with engine 1, engine 1 pass through double-clutch speed changer 4
The wheel of hybrid vehicle is output power to, power motor 2 is used to output driving force to the wheel of hybrid vehicle.Its
In, as shown in Figure 1, engine 1 and the exportable driving force of power motor 2 be to same drive axle, to realize front-wheel drive or rear-wheel
Driving.As shown in Fig. 2, engine 1 and the also exportable driving force of power motor 2 be to different drive axles, to realize four-wheel drive.
For giving power motor 2 to power, auxiliary-motor 5 is connected power battery 3 with power battery 3, at the same auxiliary-motor 5 it is direct or
It is connected indirectly with power motor 2, the negative torque under the drive of engine 1 of auxiliary-motor 5 is operated to generate electricity.Auxiliary-motor 5 produces
Raw electric energy can provide to power battery 3, power motor 2, DC-DC converter 6, low-voltage load 7 and high-voltage load (Fig. 1 and Fig. 2
In be not shown) at least one of.Wherein, low-voltage load 7 may include but be not limited to car light, radio etc., and high-voltage load can wrap
Include but be not limited to on-board air conditioner etc..
Power motor 2 and auxiliary-motor 5 respectively correspond and serve as driving motor and generator as a result, auxiliary-motor 5 when due to low speed
Generated output with higher and generating efficiency can maintain vehicle low speed so as to meet the power demand run at a low speed
Electric equilibrium maintains vehicle low speed ride comfort, promotes the power performance of vehicle.
In some embodiments, auxiliary-motor 5 can be BSG (Belt-driven Starter Generator, belt transmission
Starting/generating integrated motor) motor.It should be noted that auxiliary-motor 5 belongs to high-voltage motor, such as the power generation electricity of auxiliary-motor 5
Pressure is suitable with the voltage of power battery 3, so that the electric energy that auxiliary-motor 5 generates can be without voltage transformation directly to power battery
3 chargings can also power directly to power motor 2 and/or DC-DC converter 4.And auxiliary-motor 5 also belongs to high efficiency generator, example
Drive the power generation of auxiliary-motor 5 that 97% or more generating efficiency can be realized such as under 1 idling speed of engine.
In some embodiments, auxiliary-motor can also be set up directly on the output shaft of engine.
The power of BSG motor or the auxiliary-motor and engine that are set up directly on the output shaft of engine contacts relatively close
It cuts, is consequently adapted to implement the hybrid vehicle of the embodiment of the present invention and its downshift control method and system.
The hybrid vehicle of the present invention is described in detail embodiment and its downshift control method and system with reference to the accompanying drawing.
Fig. 3 is the flow chart according to the downshift control method of the hybrid vehicle of the embodiment of the present invention.
As shown in figure 3, the downshift control method of the hybrid vehicle of the embodiment of the present invention, comprising the following steps:
S1 obtains the duration in inertia phase stage during downshift when double-clutch speed changer enters downshift process.
When double-clutch speed changer is in the first gear, engine positive-torque operating, if there is downshift to the second gear
Demand, then gear box control unit can enter downshift process by issuing down shift demand to control double-clutch speed changer.
Wherein, include two clutches in double-clutch speed changer, the gear before downshift can be set in an embodiment of the present invention
Under position, i.e. the clutch separated under the first gear is first clutch, and the clutch of engagement is second clutch, by first gear
Potential drop is kept off to the second gear, and isolated clutch is second clutch, and the clutch of engagement is first clutch.Namely
Say, first clutch is the clutch that engages under gear after downshift, second clutch be engaged under gear before downshift from
Clutch.
Generally, as shown in figure 4, during the downshift of double-clutch speed changer, the revolving speed of engine is in the inertia phase stage
Constantly rise, by before the t1 time with second clutch with revolving speed rise to after the t2 time with first clutch same revolving speed, i.e.,
T1 time to the t2 time corresponds to the inertia phase stage.Meanwhile the torque of second clutch with second clutch separation process and
The final transmission for disconnecting power and it is whole be in downward trend, the torque of first clutch with first clutch engaging process
Transmission and the whole trend in rising with final adapter tube power.
It should be appreciated that the duration in inertia phase stage is related to the climbing speed of the revolving speed of engine, and accelerator open degree
The climbing speed of the revolving speed of engine can be influenced, therefore, the duration in inertia phase stage and the accelerator open degree of engine can have
There is corresponding relationship, in some embodiments of the invention, continuing for inertia phase stage can be obtained according to the accelerator open degree of engine
Time.
For example, the duration in inertia phase stage and accelerator open degree can have corresponding relationship as shown in Table 1, pass through
It obtains current accelerator open degree and tabled look-up for 1 duration that can obtain the inertia phase stage during current downshift.Such as 1 institute of table
Show, it is assumed that accelerator open degree when gear box control unit issues down shift demand is 60%, then the drop entered according to the down shift demand
During gear, the duration in inertia phase stage is T3.
Table 1
| Accelerator open degree | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
| Duration | T1 | T1 | T2 | T2 | T3 | T3 | T4 | T4 | T4 |
In addition, the duration in inertia phase stage is related in the variable quantity in inertia phase stage to the revolving speed of engine, and it is double
Rotational speed difference between the first clutch and second clutch of clutch speed changer can characterize the revolving speed of engine in inertia phase rank
The variable quantity of section therefore in some embodiments of the invention, can also be according to the first clutch of double-clutch speed changer and second
Rotational speed difference between clutch obtains the duration in inertia phase stage.
Certainly, in some embodiments of the invention, it may also be combined with the accelerator open degree and double-clutch speed changer of engine
Two conditions of rotational speed difference of first clutch and second clutch obtain duration in inertia phase stage.
S2 obtains the target torque of auxiliary-motor according to the duration in inertia phase stage.
S3 controls the operating of auxiliary-motor positive-torque according to the target torque of auxiliary-motor, to improve the rising of the revolving speed of engine
Rate.
In one embodiment of the invention, before the target torque for obtaining auxiliary-motor, inertia phase can be also obtained respectively
The rotating speed of target of the first clutch of double-clutch speed changer and second clutch at the end of stage, and obtain the current torsion of engine
Square, the current operation inertia of engine and the current torque of second clutch.
In one embodiment of the invention, the torque of second clutch can be according to the torque of engine, vehicle resistance, whole
Vehicle inertia, flywheel inertia etc. are calculated.The problem of in view of work of slipping and vehicle acceleration responsive, the torque of second clutch
It also should be within the scope of predetermined torque, should not be too large or too small, guarantee that the torque of second clutch is within the scope of predetermined torque
When, clutch work of slipping is no more than the work of slipping of calibration, and vehicle acceleration is not less than predetermined acceleration threshold value.
At the end of obtaining the inertia phase stage rotating speed of target of the first clutch of double-clutch speed changer and second clutch,
After the current torque of the current torque of engine, the current operation inertia of engine and second clutch, and acquired
When the torque of two clutches is within the scope of predetermined torque, can according to the inertia phase stage at the end of double-clutch speed changer first from
The difference of the rotating speed of target of clutch and second clutch and the target torque of auxiliary-motor calculate the aimed acceleration dwe/ of engine
Dt:dwe/dt=(Sc1-Sc2)/ta, wherein Sc1 and Sc2 is respectively first of double-clutch speed changer at the end of the inertia phase stage
The rotating speed of target of clutch and second clutch, ta are the duration in inertia phase stage.It then can be further according to engine
Aimed acceleration, the current operation inertia of engine, the current torque of engine, second clutch current torque obtain it is secondary
Motor torque to be output, the i.e. target torque of auxiliary-motor.Specifically, the target that can calculate auxiliary-motor according to the following formula is turned round
Square:
Tm=[Je* (Sc1-Sc2)/ta-Te+Tc2]/Rate (1)
Wherein, Tm is the target torque of auxiliary-motor, and Je is the current operation inertia of engine, and Te is the current torsion of engine
Square, Tc2 are the current torque of second clutch, and Rate is the transmission ratio of auxiliary-motor and engine, when auxiliary-motor is set up directly on
When on the output shaft of engine, Rate 1.It should be noted that the determiners such as " target " and " current " in parameter, herein only
The features such as property, the time for limiting the parameter, without the parameter before and after addition determiner should be regarded as expression different concepts
Parameter.For example, " target " described in the target torque of auxiliary-motor, indicates that the parameter is the required parameter obtained, essence
On be still auxiliary-motor torque；The rotating speed of target of first clutch, set revolving speed or phase at the end of the expression inertia phase stage
Hope the revolving speed reached；The current operation inertia of engine, indicates the rotary inertia of the engine of current time.
According to above-mentioned formula (1) it is found that the duration in inertia phase stage can determine the aimed acceleration of engine, then
Determine the target torque of auxiliary-motor.It, can be according to auxiliary-motor after the target torque of auxiliary-motor is calculated according to above-mentioned formula (1)
Target torque control auxiliary-motor positive-torque operating, wherein can control during entire downshift auxiliary-motor positive-torque operate,
It can only be operated in inertia phase stage control auxiliary-motor positive-torque.It is operated by the positive-torque of auxiliary-motor, applies to engine and drive
Torque can make the revolving speed of engine rapid increase under the auxiliary of auxiliary-motor.
The downshift control method of hybrid vehicle according to an embodiment of the present invention, passes through the downshift in double-clutch speed changer
Control auxiliary-motor applies positive-torque to engine in the process, can effectively shorten downshift time of hybrid vehicle, improves and uses
The driving at family is experienced, while can also reduce the work of slipping of clutch in double-clutch speed changer, helps to extend double clutch speed-changings
The service life of clutch in device.
The downshift control method of the hybrid vehicle of corresponding above-described embodiment, the present invention also propose a kind of non-transitory meter
Calculation machine readable storage medium storing program for executing.
The non-transitorycomputer readable storage medium of the embodiment of the present invention, is stored thereon with computer program, when the journey
, it can be achieved that the downshift control method for the hybrid vehicle that the above embodiment of the present invention proposes when sequence is executed by processor.
Non-transitorycomputer readable storage medium according to an embodiment of the present invention, by the computer journey for executing its storage
Sequence, can effectively shorten downshift time of hybrid vehicle, improve the driving experience of user, while can also reduce double clutches
The work of slipping of clutch in speed changer facilitates the service life for extending clutch in double-clutch speed changer.
Corresponding above-described embodiment, the present invention also propose a kind of downshift control system of hybrid vehicle.
As shown in figure 5, the downshift control system 100 of the hybrid vehicle of the embodiment of the present invention, including the first acquisition mould
Block 10, second obtains module 20 and control module 30.
Wherein, first module 10 is obtained for it is used in the process to obtain downshift when double-clutch speed changer enters downshift process
The duration in property phase stage；Second obtains the target that module 20 is used to obtain auxiliary-motor according to the duration in inertia phase stage
Torque；Control module 30 is used to control the operating of auxiliary-motor positive-torque according to the target torque of auxiliary-motor, to improve turning for engine
The climbing speed of speed.
When double-clutch speed changer is in the first gear, engine positive-torque operating, if there is downshift to the second gear
Demand, then gear box control unit can enter downshift process by issuing down shift demand to control double-clutch speed changer.
Wherein, include two clutches in double-clutch speed changer, the gear before downshift can be set in an embodiment of the present invention
Under position, i.e. the clutch separated under the first gear is first clutch, and the clutch of engagement is second clutch, by first gear
Potential drop is kept off to the second gear, and isolated clutch is second clutch, and the clutch of engagement is first clutch.Namely
Say, first clutch is the clutch that engages under gear after downshift, second clutch be engaged under gear before downshift from
Clutch.
Generally, as shown in figure 4, during the downshift of double-clutch speed changer, the revolving speed of engine is in the inertia phase stage
Constantly rise, by before the t1 time with second clutch with revolving speed rise to after the t2 time with first clutch same revolving speed, i.e.,
T1 time to the t2 time corresponds to the inertia phase stage.Meanwhile the torque of second clutch with second clutch separation process and
The final transmission for disconnecting power and it is whole be in downward trend, the torque of first clutch with first clutch engaging process
Transmission and the whole trend in rising with final adapter tube power.
It should be appreciated that the duration in inertia phase stage is related to the climbing speed of the revolving speed of engine, and accelerator open degree
The climbing speed of the revolving speed of engine can be influenced, therefore, the duration in inertia phase stage and the accelerator open degree of engine can have
There is corresponding relationship, in some embodiments of the invention, first obtains module 10 can be used according to the acquisition of the accelerator open degree of engine
The duration in property phase stage.
For example, the duration in inertia phase stage and accelerator open degree can have a corresponding relationship as shown in Table 1, and first
Obtaining module 10 1 can obtain continuing for inertia phase stage during current downshift by obtaining current accelerator open degree and tabling look-up
Time.As shown in table 1, it is assumed that accelerator open degree when gear box control unit issues down shift demand is 60%, then according to the downshift
During instructing the downshift entered, the duration in inertia phase stage is T3.
In addition, the duration in inertia phase stage is related in the variable quantity in inertia phase stage to the revolving speed of engine, and it is double
Rotational speed difference between the first clutch and second clutch of clutch speed changer can characterize the revolving speed of engine in inertia phase rank
The variable quantity of section, therefore, in some embodiments of the invention, first obtains module 10 can also be according to the of double-clutch speed changer
Rotational speed difference between one clutch and second clutch obtains the duration in inertia phase stage.
Certainly, in some embodiments of the invention, first acquisition module 10 may also be combined with engine accelerator open degree and
Two conditions of rotational speed difference of the first clutch of double-clutch speed changer and second clutch come obtain the inertia phase stage it is lasting when
Between.
In one embodiment of the invention, before the target torque for obtaining that module 10 obtains auxiliary-motor first, may be used also
Module is obtained by third and obtains the first clutch of double-clutch speed changer and second clutch at the end of the inertia phase stage respectively
Rotating speed of target, and obtain module by the 4th and obtain the current torque of engine, the current operation inertia of engine and the second clutch
The current torque of device.
In one embodiment of the invention, the torque of second clutch can be according to the torque of engine, vehicle resistance, whole
Vehicle inertia, flywheel inertia etc. are calculated.The problem of in view of work of slipping and vehicle acceleration responsive, the torque of second clutch
It also should be within the scope of predetermined torque, should not be too large or too small, guarantee that the torque of second clutch is within the scope of predetermined torque
When, clutch work of slipping is no more than the work of slipping of calibration, and vehicle acceleration is not less than predetermined acceleration threshold value.
The first clutch of double-clutch speed changer and the second clutch at the end of module obtains the inertia phase stage are obtained in third
The rotating speed of target of device, and the 4th obtains the current operation inertia and second that module obtains the current torque of engine, engine
After the current torque of clutch and the torque of second clutch acquired in the 4th acquisition module is within the scope of predetermined torque
When, second obtain module 20 can according to the inertia phase stage at the end of double-clutch speed changer first clutch and second clutch
The difference of rotating speed of target and the target torque of auxiliary-motor calculate the aimed acceleration dwe/dt:dwe/dt=(Sc1-of engine
Sc2)/ta, wherein Sc1 and Sc2 is respectively the first clutch of double-clutch speed changer and the second clutch at the end of the inertia phase stage
The rotating speed of target of device, ta are the duration in inertia phase stage.Then the second acquisition module 20 can be further according to engine
Aimed acceleration, the current operation inertia of engine, the current torque of engine, the current torque acquisition of second clutch are secondary electric
Machine torque to be output, the i.e. target torque of auxiliary-motor.Specifically, the second acquisition module 20 can calculate pair according to the following formula
The target torque of motor:
Tm=[Je* (Sc1-Sc2)/ta-Te+Tc2]/Rate (1)
Wherein, Tm is the target torque of auxiliary-motor, and Je is the current operation inertia of engine, and Te is the current torsion of engine
Square, Tc2 are the current torque of second clutch, and Rate is the transmission ratio of auxiliary-motor and engine, when auxiliary-motor is set up directly on
When on the output shaft of engine, Rate 1.It should be noted that the determiners such as " target " and " current " in parameter, herein only
The features such as property, the time for limiting the parameter, without the parameter before and after addition determiner should be regarded as expression different concepts
Parameter.For example, " target " described in the target torque of auxiliary-motor, indicates that the parameter is the required parameter obtained, essence
On be still auxiliary-motor torque；The rotating speed of target of first clutch, set revolving speed or phase at the end of the expression inertia phase stage
Hope the revolving speed reached；The current operation inertia of engine, indicates the rotary inertia of the engine of current time.
According to above-mentioned formula (1) it is found that the duration in inertia phase stage can determine the aimed acceleration of engine, then
Determine the target torque of auxiliary-motor.The target torque of auxiliary-motor is calculated according to above-mentioned formula (1) in the second acquisition module 20
Afterwards, control module 30 can control the operating of auxiliary-motor positive-torque according to the target torque of auxiliary-motor, wherein control module 30 can be whole
The operating of auxiliary-motor positive-torque is controlled during a downshift, can also only be operated in inertia phase stage control auxiliary-motor positive-torque.Pass through
The positive-torque of auxiliary-motor operates, and applies driving torque to engine, and the revolving speed of engine can be made fast under the auxiliary of auxiliary-motor
Speed rises.
The downshift control system of hybrid vehicle according to an embodiment of the present invention, by control module in double clutch speed-changings
Control auxiliary-motor during the downshift of device and apply positive-torque to engine, can effectively shorten hybrid vehicle downshift when
Between, the driving experience of user is improved, while the work of slipping of clutch in double-clutch speed changer can also be reduced, helps to extend double
The service life of clutch in clutch speed changer.
Corresponding above-described embodiment, the present invention also propose a kind of hybrid vehicle.
As shown in fig. 6, the hybrid vehicle 1000 of the embodiment of the present invention, proposes mixed including the above embodiment of the present invention
Close the downshift control system 100 of power vehicle.Its specific embodiment can refer to above-described embodiment, to avoid redundancy, herein
It repeats no more.
Hybrid vehicle according to an embodiment of the present invention, can effectively shorten the downshift time, improve the driving body of user
It tests, while the work of slipping of clutch in double-clutch speed changer can also be reduced, help to extend clutch in double-clutch speed changer
Service life.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (12)
1. a kind of downshift control method of hybrid vehicle, which is characterized in that the hybrid vehicle includes engine, moves
Force motor, power battery, double-clutch speed changer, the auxiliary-motor being connected with the engine, the engine by it is described it is double from
The wheel that speed changer outputs power to the hybrid vehicle is closed, the power motor is described mixed for outputting driving force to
Close power vehicle wheel, the power battery for give the power motor power supply, the auxiliary-motor respectively with the power
Motor is connected with the power battery, and negative torque operating is under the drive of the engine to generate electricity for the auxiliary-motor, institute
State downshift control method the following steps are included:
When the double-clutch speed changer enters downshift process, the duration in inertia phase stage during the downshift is obtained；
The target torque of the auxiliary-motor is obtained according to the duration in the inertia phase stage；
According to the target torque of the auxiliary-motor auxiliary-motor positive-torque operating is controlled, to improve the revolving speed of the engine
Climbing speed.
2. the downshift control method of hybrid vehicle according to claim 1, which is characterized in that according to the engine
Accelerator open degree obtain duration in the inertia phase stage.
3. the downshift control method of hybrid vehicle according to claim 2, which is characterized in that obtaining the secondary electricity
Before the target torque of machine, further includes:
The first clutch of the double-clutch speed changer and the mesh of second clutch at the end of the inertia phase stage are obtained respectively
Mark revolving speed, wherein the first clutch is the clutch engaged under the gear after downshift, and the second clutch is before downshift
Gear under the clutch that engages；
Obtain the current torsion of the current torque of the engine, the current operation inertia of the engine and the second clutch
Square.
4. the downshift control method of hybrid vehicle according to claim 3, which is characterized in that count according to the following formula
Calculate the target torque of the auxiliary-motor:
Tm=[Je* (Sc1-Sc2)/ta-Te+Tc2]/Rate,
Wherein, Tm is the target torque of the auxiliary-motor, and Je is the current operation inertia of the engine, and Sc1 and Sc2 are respectively
The first clutch of the double-clutch speed changer and the rotating speed of target of second clutch at the end of the inertia phase stage, ta are institute
The duration in inertia phase stage is stated, Te is the current torque of the engine, and Tc2 is the current torsion of the second clutch
Square, Rate are the transmission ratio of the auxiliary-motor and the engine.
5. the downshift control method of hybrid vehicle described in any one of -4 according to claim 1, which is characterized in that described
Auxiliary-motor is BSG motor.
6. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, which is characterized in that the program quilt
The downshift control method of any hybrid vehicle in -5 according to claim 1 is realized when processor executes.
7. a kind of downshift control system of hybrid vehicle, which is characterized in that the hybrid vehicle includes engine, moves
Force motor, power battery, double-clutch speed changer, the auxiliary-motor being connected with the engine, the engine by it is described it is double from
The wheel that speed changer outputs power to the hybrid vehicle is closed, the power motor is described mixed for outputting driving force to
Close power vehicle wheel, the power battery for give the power motor power supply, the auxiliary-motor respectively with the power
Motor is connected with the power battery, and negative torque operating is under the drive of the engine to generate electricity for the auxiliary-motor, institute
Stating downshift control system includes:
First obtains module, for obtaining inertia during the downshift when the double-clutch speed changer enters downshift process
The duration in phase stage；
Second obtains module, for obtaining the target torque of the auxiliary-motor according to the duration in the inertia phase stage；
Control module is operated for controlling the auxiliary-motor positive-torque according to the target torque of the auxiliary-motor, described in improving
The climbing speed of the revolving speed of engine.
8. the downshift control system of hybrid vehicle according to claim 7, which is characterized in that described first obtains mould
Root tuber obtains the duration in the inertia phase stage according to the accelerator open degree of the engine.
9. the downshift control system of hybrid vehicle according to claim 8, which is characterized in that further include:
Third obtains module, for obtaining the first clutch of the double-clutch speed changer at the end of the inertia phase stage respectively
With the rotating speed of target of second clutch, wherein the first clutch is the clutch that engages under gear after downshift, described the
Two clutches are the clutch that engages under gear before downshift；
4th obtains module, for obtaining the current operation inertia of the current torque of the engine, the engine and described
The current torque of second clutch.
10. the downshift control system of hybrid vehicle according to claim 9, which is characterized in that described second obtains
Module calculates the target torque of the auxiliary-motor according to the following formula:
Tm=[Je* (Sc1-Sc2)/ta-Te+Tc2]/Rate,
Wherein, Tm is the target torque of the auxiliary-motor, and Je is the current operation inertia of the engine, and Sc1 and Sc2 are respectively
The first clutch of the double-clutch speed changer and the rotating speed of target of second clutch at the end of the inertia phase stage, ta are institute
The duration in inertia phase stage is stated, Te is the current torque of the engine, and Tc2 is the current torsion of the second clutch
Square, Rate are the transmission ratio of the auxiliary-motor and the engine.
11. the downshift control system of the hybrid vehicle according to any one of claim 7-10, which is characterized in that institute
Stating auxiliary-motor is BSG motor.
12. a kind of hybrid vehicle, which is characterized in that including hybrid power according to any one of claims 7-11
The downshift control system of automobile.
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| CN201710911842.6A CN109572668B (en) | 2017-09-29 | 2017-09-29 | Hybrid electric vehicle and downshift control method and system thereof |
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| CN201710911842.6A CN109572668B (en) | 2017-09-29 | 2017-09-29 | Hybrid electric vehicle and downshift control method and system thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111071243A (en) * | 2019-12-29 | 2020-04-28 | 吉泰车辆技术（苏州）有限公司 | Seamless downshift control method of hybrid system |
| CN112092814A (en) * | 2019-06-18 | 2020-12-18 | 比亚迪股份有限公司 | Vehicle downshift acceleration control method and device and vehicle |
| CN115095654A (en) * | 2022-06-28 | 2022-09-23 | 东风汽车集团股份有限公司 | Method for synchronously controlling rotating speed of power downshift engine of double-clutch automatic transmission |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010023505A1 (en) * | 2010-06-11 | 2011-12-15 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for adapting characteristics of separation clutch in vehicle hybrid power train, involves determining clutch moment based on determined reduction in rotation speed, and adapting characteristics of clutch based on moment |
| CN105000015A (en) * | 2015-07-03 | 2015-10-28 | 同济大学 | Method for controlling ISG (Integrated Starter Generator) motor to get involved in gear shifting of dual clutch automatic transmission |
| CN105313887A (en) * | 2014-07-31 | 2016-02-10 | 福特环球技术公司 | Systems and methods for improving hybrid vehicle transmission shifting |
| CN106671972A (en) * | 2015-11-10 | 2017-05-17 | 现代自动车株式会社 | Shift control method for hybrid vehicle with dct |
-
2017
- 2017-09-29 CN CN201710911842.6A patent/CN109572668B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010023505A1 (en) * | 2010-06-11 | 2011-12-15 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Method for adapting characteristics of separation clutch in vehicle hybrid power train, involves determining clutch moment based on determined reduction in rotation speed, and adapting characteristics of clutch based on moment |
| CN105313887A (en) * | 2014-07-31 | 2016-02-10 | 福特环球技术公司 | Systems and methods for improving hybrid vehicle transmission shifting |
| CN105000015A (en) * | 2015-07-03 | 2015-10-28 | 同济大学 | Method for controlling ISG (Integrated Starter Generator) motor to get involved in gear shifting of dual clutch automatic transmission |
| CN106671972A (en) * | 2015-11-10 | 2017-05-17 | 现代自动车株式会社 | Shift control method for hybrid vehicle with dct |
Non-Patent Citations (1)
| Title |
|---|
| 刘永刚 等: "《混合动力汽车行进间起动发动机与DCT换挡协调控制》", 《华南理工大学学报（自然科学版）》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092814A (en) * | 2019-06-18 | 2020-12-18 | 比亚迪股份有限公司 | Vehicle downshift acceleration control method and device and vehicle |
| CN111071243A (en) * | 2019-12-29 | 2020-04-28 | 吉泰车辆技术（苏州）有限公司 | Seamless downshift control method of hybrid system |
| CN115095654A (en) * | 2022-06-28 | 2022-09-23 | 东风汽车集团股份有限公司 | Method for synchronously controlling rotating speed of power downshift engine of double-clutch automatic transmission |
| CN115095654B (en) * | 2022-06-28 | 2023-09-19 | 东风汽车集团股份有限公司 | Synchronous control method for power downshift engine speed of double-clutch automatic transmission |
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| Publication number | Publication date |
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| CN109572668B (en) | 2020-12-25 |
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