CN107476891B - A kind of control method for the generator compensation torque in distance increasing unit - Google Patents
A kind of control method for the generator compensation torque in distance increasing unit Download PDFInfo
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- CN107476891B CN107476891B CN201710677309.8A CN201710677309A CN107476891B CN 107476891 B CN107476891 B CN 107476891B CN 201710677309 A CN201710677309 A CN 201710677309A CN 107476891 B CN107476891 B CN 107476891B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/008—Arrangements for controlling electric generators for the purpose of obtaining a desired output wherein the generator is controlled by the requirements of the prime mover
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/45—Special adaptation of control arrangements for generators for motor vehicles, e.g. car alternators
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
The present invention provides a kind of control methods for the generator compensation torque in distance increasing unit, engine exports predetermined power in the operating condition, to meet the needs of distance increasing unit generated output, predetermined power corresponds to the target torque of engine, control method comprises determining that under predetermined power, the reality output torque of engine and the first undulating value of target torque；And determine the torque compensation controlling elements of generator, so that being worth to obtain the compensation torque value that generator needs to compensate engine according to torque compensation controlling elements and the first fluctuation；The reality output torque that generator is determined according to target torque and compensation torque value, so that the reality output torque of generator and the reality output torque direction of engine are on the contrary, equal in magnitude or close.Control method of the invention to achieve the purpose that reduce engine luggine level, and then improves the NVH performance of distance increasing unit entirety by the real-time torque of regulator generator according to the different operating conditions of engine.
Description
Technical field
The present invention relates to Development of HEV Technology fields, compensate more particularly to a kind of generator in distance increasing unit
The control method of torque.
Background technique
With engine thermal efficiency, the promotion of electric efficiency and the popularization of new energy technology, new energy vehicle flowrate is obtained
More and more extensive is universal.But relative to the vehicle being driven by electricity completely, new energy vehicle generally uses distance increasing unit and mixing
The form of power.And as efficient distance increasing unit technology is risen gradually, especially it is partial to the distance increasing unit technology of miniaturization
Development, the distance increasing unit of miniaturization often use the four-stroke engine of the single cylinder of small displacement, 2 cylinders or 3 cylinders.
Engine exports mechanical work when distance increasing unit works, and generator converts mechanical energy into electric energy.In the process, start
The torque of machine output and the moment of torsion of generator etc., the revolving speed of engine is also equal with the revolving speed of generator.But with engine
The reduction of number of cylinders, the vibration of engine are more difficult to inhibit, if only will very by the methods of optimization crankshaft, the structure of flywheel inertia
It is horizontal that difficulty reaches ideal engine luggine.
Summary of the invention
It is an object of the present invention to provide a kind of control method for the generator compensation torque in distance increasing unit, institute
Control method is stated according to the different operating conditions of engine, by the real-time torque of regulator generator, so that reaching reduces engine vibration
Horizontal purpose is moved, and then improves the NVH performance of distance increasing unit entirety.
Particularly, the present invention provides a kind of control method for the generator compensation torque in distance increasing unit, the increasings
Engine in journey device exports predetermined power in the operating condition, described pre- to meet the needs of distance increasing unit generated output
Determine the target torque that power corresponds to the engine, the control method of the generator compensation torque is comprised determining that described pre-
Determine under power, the reality output torque of the engine and the difference of target torque, the difference is the first undulating value；And it determines
The torque compensation controlling elements of the generator, so that being worth according to the torque compensation controlling elements and first fluctuation
The compensation torque value compensated to the engine is needed to the generator；Then, according to the target torque and described
Compensation torque value determines the reality output torque of the generator, so that the reality output torque of the generator and the hair
The reality output torque direction of motivation is on the contrary, equal in magnitude or close.
Further, the working condition of the engine is air inflow, compression ratio, distributive value and burning moment phase
Same determines operating condition.
Further, the predetermined power is a predetermined value.
Further, the predetermined power is multiple and different predetermined value, and each predetermined value corresponds to each predetermined power, institute
State the control method of generator compensation torque further include: determining first undulating value under each predetermined power, institute
The reality output torque for stating torque compensation controlling elements, the compensation torque value and the generator, so that described each
The reality output torque of the generator under predetermined power is with the reality output torque direction of the engine on the contrary, size phase
Deng or it is close.
Further, the engine is the four-stroke engine of single cylinder.
Further, the engine is the four-stroke engine of multi-cylinder, and the reality output torque of the engine is institute
State the superposition of the output torque of each cylinder in multi-cylinder.
Further, torque responsive of the torque compensation controlling elements according to the generator under the predetermined power
Characteristic and first undulating value obtain.
Further, after the engine stabilizer exports the predetermined power, the generator is according to the controlling party
Method exports the reality output torque of the generator.
Control method of the present invention for the generator compensation torque in distance increasing unit generates electricity due to determining simply by calculating
The compensation torque value of machine, so that generator reaches the compensation torque value under predetermined power, therefore the present invention can be
Do not increase components cost, in the case where particularly not optimizing engine flywheel inertia, reaches the mesh of optimization distance increasing unit NVH performance
's.
Further, control method of the present invention for the generator compensation torque in distance increasing unit, due to accurately controlling
The torque of generator, therefore in the workmanship stroke of engine, enable to generator adequate compensation a part because of engine wave
Dynamic and generation torque, and then impact force of the partial action on mechanical part can be offset, it is sent out in working stroke with stabilizing
Impact of the piston of motivation to crankshaft, and reduce the failure probability of related components.
Further, control method of the present invention for the generator compensation torque in distance increasing unit, due to passing through control hair
Motor torque inhibits the vibration of engine, therefore control method of the invention can will be passed through by energy a part of vibration loss
Generator is converted into electric energy, to improve the system effectiveness of distance increasing unit.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the schematic diagram of each component locations in distance increasing unit of the present invention, and engine 1, flywheel 2, generator is shown
3；
Fig. 2 is the relation schematic diagram of engine output torque of the invention and engine in-cylinder pressure, wherein abscissa is
The angular phase of engine flywheel, the ordinate on the left side represent in-cylinder pressure P, and the piston that the ordinate on the right represents engine is defeated
Torque T out；
Fig. 3 be the flywheel end torque of three-cylinder engine, the target torque of three-cylinder engine and flywheel angular phase it
Between relation schematic diagram, wherein abscissa is the angular phase of engine flywheel, and ordinate is torque T, parallel shown in figure
In the target torque T that the straight line of abscissa is three-cylinder engineset, and the curve fluctuated up and down shown in figure is that three cylinders start
The flywheel end torque of machine, i.e. the reality output torque of three-cylinder engine；
Fig. 4 be according to an embodiment of the present invention in for the generator compensation torque in distance increasing unit control method hair
The relation schematic diagram of the reality output torque of the reality output torque and engine of motor, wherein abscissa is engine flywheel
Angular phase, represent the torque T of engine upwards along ordinate, represent the torque T of generator downwards along ordinateM,
In the target torque T that the straight line that first quartile is parallel to abscissa is three-cylinder engine shown in figureset, on first quartile
The curve of lower fluctuation is the flywheel end torque of three-cylinder engine, i.e. the reality output torque of three-cylinder engine；Shown in figure
The straight line that fourth quadrant is parallel to abscissa is the target torque T of generatorset-M, the curve fluctuated above and below fourth quadrant is hair
The reality output torque of motor.
Specific embodiment
As shown in Figure 1, distance increasing unit is made of generator 3, the mechanical connection of engine 1.Engine passes through brace and connecting rod framework
Energy is transferred to flywheel 2 by crank, and is transferred to generator 3.Engine 1 turns the chemical energy of fuel when distance increasing unit works
It is changed to mechanical energy output, then this some mechanical can be converted to power output by generator 3.
The vibration source of distance increasing unit is inside engine 1.For four-stroke engine, work as engine
1 when being in working stroke, and combustible gas burning in cylinder pushes piston that power is transferred to crankshaft, piston, crankshaft, flywheel 2 in this trip
Suffered impact force is much greater compared with other stroke institute stress.Therefore, during flywheel 2 rotates one week, in working stroke
Flywheel 2 suffered by power be greater than other moment, and power suffered by flywheel 2 is in periodically.And for single cylinder, flywheel
Primary acting is completed in 2 720 degree of every rotations.Crankshaft and flywheel 2 bear the impact force of piston transmitting, this impact force in working stroke
For the energy source of engine luggine.
As shown in Fig. 2, it illustrates the signals of the relationship of engine output torque T of the invention and engine in-cylinder pressure P
Figure.The engine is the output torque T completed in the case where determining operating condition and the measurement of in-cylinder pressure P, at this point, the engine into
Tolerance, compression ratio, distributive value and burning moment may be considered identical.The angular phase of engine flywheel 360 °~
In the range of 540 °, engine in-cylinder pressure P variation acutely, also produces fluctuation so as to cause engine output torque T.And
And in the range of 360 °~540 °, engine in-cylinder pressure P and engine output torque T have peak value.Due to engine
The fluctuation that output torque T is generated, other components in engine, such as crankshaft and flywheel need to bear at this moment piston transmitting
Impact force, to reduce NVH performance.Therefore, the present invention reduces engine luggine level to reach, and then improves increasing
The purpose of the NVH performance of journey device entirety proposes a kind of control method for the generator compensation torque in distance increasing unit.
Engine in the distance increasing unit exports predetermined power in the operating condition, to meet the distance increasing unit generated output
Demand, wherein the predetermined power corresponds to the target torque of the engine.The control method of the generator compensation torque
Include:
Step 1: determining under the predetermined power, the reality output torque of the engine and the difference of target torque,
The difference is the first undulating value.
Specifically, according to available first undulating value of Fig. 3 and following equation.
Fig. 3 shows the angle phase of the flywheel end torque of three-cylinder engine, the target torque of three-cylinder engine and flywheel
Relation schematic diagram between position, wherein abscissa is the angular phase of engine flywheel, and ordinate is torque T, shown in figure
The straight line for being parallel to abscissa is the target torque T of three-cylinder engineset, and the curve fluctuated up and down shown in figure is three cylinders
The flywheel end torque of engine, i.e. the reality output torque of three-cylinder engine.In some embodiments, the engine can be
The four-stroke engine of single cylinder.In other embodiments, the engine can be the four-stroke engine of multi-cylinder, described to start
The reality output torque of machine is the superposition of the output torque of each cylinder in the multi-cylinder.
The reality output torque of the engine can be tested by rack, and the real-time phase of each cylinder of engine can
To be obtained by engine controller.The pass of the angular phase of the reality output torque and engine flywheel of three-cylinder engine in Fig. 3
It is as follows:
Wherein:
TflywheelIt is the reality output torque of engine；
It is the phase of each cylinder of engine；
nsetIt is the rotating speed of target of engine；
TsetIt is the target torque of engine.
The operating condition of engine is more stable compared to the operating condition of traditional on-board engine in distance increasing unit.Engine in distance increasing unit
It only needs to export predetermined power in the operating condition, to meet the needs of distance increasing unit generated output.Also, the predetermined function
Rate can be a predetermined value.In other embodiments, the predetermined power is also possible to multiple and different predetermined values.Wherein,
Each described predetermined power corresponds to a target torque and a rotating speed of target for the engine.Therefore, predetermined power
The target torque and rotating speed of target that can be set by engine obtain, the target torque and rotating speed of target of predetermined power and engine
Relationship it is as follows:
Pi=f (Tset-i, nset-i) (2)
Wherein:
PiIt is the predetermined power of distance increasing unit setting；
nset-iIt is the rotating speed of target of engine setting under the predetermined power；
Tset-iIt is the target torque of engine setting under the predetermined power.
Therefore, according to formula (1) and formula (2), the reality output torque of engine and the angular phase of engine flywheel
Relationship also may indicate that it is as follows:
As shown in figure 3, being parallel to the target of three-cylinder engine representated by the straight line of abscissa in the same phase of flywheel
Torque TsetWith the reality output torque T of engine representated by the curve that fluctuates up and downflywheelBetween difference:
ΔTflywheel=Tflywheel-Tset (4)
And then it obtains under predetermined power, the reality output torque of the engine and the difference of target torque, the difference
Value is the first undulating value:
Wherein:
ΔTflywheelIt is the same phase in flywheel, the difference of the reality output torque of target torque and engine；
ΔTflywheel-iIt is the difference of the reality output torque of target torque and engine under predetermined power, i.e., first
Undulating value, moreover, the size of first undulating value is also the subsequent target value for needing to compensate of generator.
Further, the control method of the generator compensation torque further include:
Step 2: determining the torque compensation controlling elements of the generator so that according to the torque compensation control because
Sub and described first fluctuation is worth to obtain the compensation torque value that the generator needs to compensate the engine.
Specifically, according to Fig. 4 and the available compensation torque value of following equation.
Fig. 4 shows the control method according to an embodiment of the present invention for the generator compensation torque in distance increasing unit
Generator reality output torque and engine reality output torque relation schematic diagram, wherein abscissa is engine
The angular phase of flywheel represents the torque T of engine along ordinate upwards, represents the torque of generator downwards along ordinate
TM, in the target torque T that the straight line that first quartile is parallel to abscissa is three-cylinder engine shown in figureset, in first quartile
The curve fluctuated up and down is the flywheel end torque of three-cylinder engine, i.e. the reality output torque of three-cylinder engine；Shown in figure
In the target torque T that the straight line that fourth quadrant is parallel to abscissa is generatorset-M, the curve fluctuated above and below fourth quadrant is
The reality output torque of generator.
When distance increasing unit power generation, generator is the load of engine relatively.Engine output torque, due to generator torque
It is preferable to respond real-time, generator applies and the reversed torque of engine output torque at this time.Therefore, what generator applied is reversed
Compensation torque value can compensate for the torque ripple of engine output end.
Therefore, in order to obtain application required for generator compensation torque value size, the present invention it needs to be determined that torque mend
Repay controlling elements.The torque compensation controlling elements according to torque responsive characteristic of the generator under the predetermined power with
And first undulating value obtains.Wherein, the torque responsive characteristic can simulate distance increasing unit in predetermined function by motor bench
The operating condition of generator obtains under rate.Therefore, the present invention can be according to the torque compensation controlling elements and first undulating value
Obtain the compensation torque value that the generator needs to compensate the engine.The calculation of the compensation torque value is such as
Under:
Toffset-M=Δ Tflywheel×λi (6)
Wherein:
Toffset-MIt is compensation torque value；
λiIt is torque compensation controlling elements.
Since Δ T hereinbefore has been obtainedflywheelWith the relational expression of its dependent variable, therefore, the compensation torque value
Calculation can also be as follows:
Further, the control method of the generator compensation torque further include:
Step 3: determining the reality output torque of the generator according to the target torque and the compensation torque value,
So that the reality output torque direction of the reality output torque of the generator and the engine on the contrary, it is equal in magnitude or
It is close.
Specifically, according to Fig. 4 and the reality output torque of the available generator of following equation.
Due to the target torque T of enginesetEqual to the target torque T of generatorset-M, therefore, the present invention is finally according to institute
It states target torque and the compensation torque value determines the reality output torque of the generator, so that the reality of the generator
The reality output torque direction of output torque and the engine is on the contrary, equal in magnitude or close:
Wherein:
TmotorIt is the reality output torque value of generator.
Final basis obtains the target torque as a result, and the compensation torque value has determined that the reality of the generator is defeated
Torque out.After the engine stabilizer exports the predetermined power, the generator is according to control method output
The reality output torque of generator, and accurately controlled the torque of generator.Therefore in the workmanship stroke of engine, can make
The torque that generator adequate compensation a part is generated by engine surge is obtained, and then partial action can be offset in mechanical part
On impact force, to stabilize impact of the piston to crankshaft of the engine in working stroke, and reduce the failure of related components
Probability.
It is possible to further significantly see from Fig. 4, the target torque T of enginesetWith the target torque of generator
Tset-MIt is contrary, it is equal in magnitude.Moreover, in order to preferably offset the impact force of engine, the reality of finally obtained generator
The reality output torque direction of border output torque and the engine is on the contrary, equal in magnitude or close.
Further, when the predetermined power is multiple and different predetermined value, each predetermined value corresponds to each predetermined function
Rate, the control method of the generator compensation torque further include: determine first fluctuation under each predetermined power
Value, the torque compensation controlling elements, the reality output torque for compensating torque value and the generator, so that described
The reality output torque of the generator under each predetermined power and the reality output torque direction of the engine are on the contrary, big
It is small equal or close.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (8)
1. a kind of generator in distance increasing unit compensates the control method of torque, the engine in the distance increasing unit is in work shape
Predetermined power is exported under state, to meet the needs of distance increasing unit generated output, the predetermined power corresponds to the engine
Target torque, wherein the control method of generator compensation torque includes:
It determines under the predetermined power, the reality output torque of the engine and the difference of target torque, the difference is
First undulating value；And
The torque compensation controlling elements of the generator are determined, so that according to the torque compensation controlling elements and described first
Undulating value obtains the compensation torque value that the generator needs to compensate the engine；
Then, the reality output torque of the generator is determined according to the target torque and the compensation torque value, so that
The reality output torque of the generator is with the reality output torque direction of the engine on the contrary, equal in magnitude or close.
2. the control method of generator compensation torque according to claim 1, wherein the work shape of the engine
State is identical to determine operating condition at air inflow, compression ratio, distributive value and burning moment.
3. the control method of generator compensation torque according to claim 1, wherein the predetermined power is one predetermined
Value.
4. the control method of generator compensation torque according to claim 1, wherein the predetermined power is multiple and different
Predetermined value, each predetermined value corresponds to each predetermined power, the control method of the generator compensation torque further include:
Determine that first undulating value under each predetermined power, the torque compensation controlling elements, the compensation are turned round
The reality output torque of square value and the generator, so that the reality of the generator under each predetermined power is defeated
Torque is with the reality output torque direction of the engine on the contrary, equal in magnitude or close out.
5. the control method of the compensation of generator described in any one of -4 torque according to claim 1, wherein the engine is
The four-stroke engine of single cylinder.
6. the control method of the compensation of generator described in any one of -4 torque according to claim 1, wherein the engine is
The four-stroke engine of multi-cylinder, the reality output torque of the engine are the folded of the output torque of each cylinder in the multi-cylinder
Add.
7. the control method of the compensation of generator described in any one of -4 torque according to claim 1, wherein the torque compensation
Torque responsive characteristic and first undulating value acquisition of the controlling elements according to the generator under the predetermined power.
8. the control method of the compensation of generator described in any one of -4 torque according to claim 1, wherein when the engine
Stablize after exporting the predetermined power, the generator is turned round according to the reality output that the control method exports the generator
Square.
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| CN111173625B (en) * | 2020-01-02 | 2023-01-06 | 浙江吉利新能源商用车集团有限公司 | Vibration reduction method and device of range extender engine, range extender and vehicle |
| CN111577477A (en) * | 2020-05-08 | 2020-08-25 | 浙江吉利新能源商用车集团有限公司 | Measuring method and measuring system for engine torque of vehicle |
| CN112896141B (en) * | 2021-03-31 | 2024-04-16 | 吉林大学 | Range extender control method and device, storage medium, electronic equipment and vehicle |
| CN113027625B (en) * | 2021-04-15 | 2023-05-12 | 常州易控汽车电子股份有限公司 | IPU controller speed compensation method |
| CN113428158B (en) * | 2021-07-14 | 2022-09-20 | 同济大学 | Internal combustion engine type range extender torsional vibration hybrid control method |
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| JPS5828637A (en) * | 1981-07-20 | 1983-02-19 | Nippon Soken Inc | Torque variation detecting method for internal combustion engine |
| JPH07115707A (en) * | 1993-10-14 | 1995-05-02 | Toyota Motor Corp | Generation controller of hybrid electric vehicle |
| US7317978B2 (en) * | 2003-09-05 | 2008-01-08 | Nissan Motor Co., Ltd. | Driving force control apparatus for vehicle |
| JP2010221823A (en) * | 2009-03-23 | 2010-10-07 | Toyota Motor Corp | Hybrid vehicle |
| CN103935357A (en) * | 2013-12-23 | 2014-07-23 | 上海大郡动力控制技术有限公司 | Damping method for electric automobile range extender |
| KR20160049898A (en) * | 2014-10-28 | 2016-05-10 | 현대자동차주식회사 | Apparatus and method for toque control, motor controller |
| CN105539167B (en) * | 2015-12-30 | 2018-11-30 | 北京新能源汽车股份有限公司 | Range-extending type electric vehicle and noise suppression method thereof |
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