CN110284959A - A kind of turbocharger sluggishness improvement device and its control method based on hydrodynamic compensation - Google Patents
A kind of turbocharger sluggishness improvement device and its control method based on hydrodynamic compensation Download PDFInfo
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- CN110284959A CN110284959A CN201910687160.0A CN201910687160A CN110284959A CN 110284959 A CN110284959 A CN 110284959A CN 201910687160 A CN201910687160 A CN 201910687160A CN 110284959 A CN110284959 A CN 110284959A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000006872 improvement Effects 0.000 title description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 114
- 210000002569 neuron Anatomy 0.000 claims description 20
- 239000000523 sample Substances 0.000 claims description 18
- 230000006870 function Effects 0.000 claims description 15
- 238000013528 artificial neural network Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 4
- 230000008450 motivation Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 230000005284 excitation Effects 0.000 claims description 2
- 238000013507 mapping Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000005070 sampling Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 9
- 238000012549 training Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 6
- 238000007667 floating Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011478 gradient descent method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003062 neural network model Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
- F02B37/10—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump at least one pump being alternatively or simultaneously driven by exhaust and other drive, e.g. by pressurised fluid from a reservoir or an engine-driven pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/02—Drives of pumps; Varying pump drive gear ratio
- F02B39/08—Non-mechanical drives, e.g. fluid drives having variable gear ratio
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
- F02B39/02—Drives of pumps; Varying pump drive gear ratio
- F02B39/12—Drives characterised by use of couplings or clutches therein
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06N—COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- G06N3/00—Computing arrangements based on biological models
- G06N3/02—Neural networks
- G06N3/08—Learning methods
- G06N3/084—Backpropagation, e.g. using gradient descent
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a kind of, and the turbocharger sluggishness based on hydrodynamic compensation improves device, comprising: engine；And turbine, it is arranged at the exhaust passage of the engine, in being rotated by for emission；Compressor, impeller are arranged at the inlet channel of the engine, and coaxially connected with the turbine, and rotate synchronously with the turbine；High speed water wheels are co-axially located between the turbine and the compressor impeller, and are capable of the connection or disconnection of selectivity with the turbine；High-pressure hydraulic pump is connect by work water route with the high speed water wheels, for driving the high speed water wheel to rotate；When engine is when revolving speed is lower, compressor also can normally intervene work, improve turbo lag phenomenon, improve the dynamic property of engine.The invention discloses a kind of, and the turbocharger sluggishness based on hydrodynamic compensation improves the control method of device.
Description
Technical field
The present invention relates to technical field of automobile engine, and more particularly, the present invention relates to a kind of based on hydrodynamic compensation
Turbocharger sluggishness improves device and its control method.
Background technique
Turbocharging be it is a kind of driven using engine exhaust energy booster operation thus improve density of the induced air one
Kind technology.The exhaust gas generated when internal combustion engine, which according to certain momentum enters turbine and directly drives impeller in turbine, to be rotated,
Thus coaxially connected compressor is driven, realizes plenum.Since exhaust gas turbocharge has recycled exhaust energy, so
The economy of internal combustion engine is all better than engine driven supercharging and naturally aspirated engine.
Being pressurized sluggishness is that turbocharging needs problems faced.Since turbine is fluid machinery, revolving speed depends on exhaust stream
Speed, when internal combustion engine works at the low rotational speed, exhaust flow rate is low, and turbocharger can not intervene, at this time combustion engine powered property compared with
Difference.When internal combustion engine improves revolving speed suddenly, efficiency of vent oxidation catalyst is poor, can not intervene immediately.When booster is situated between suddenly
Fashionable, engine power increases suddenly, influences drive safety and comfort.Therefore, it is badly in need of that a kind of turbocharger sluggishness is wanted to improve
Device.
Summary of the invention
It is an object of the invention to design and develop a kind of turbocharger sluggishness improvement device based on hydrodynamic compensation,
By the way that high speed water wheels are arranged between turbine and compressor impeller, and high speed water wheels can selectively connect or be broken with turbine
It opens, and realizes the rotation of high speed water wheels by work water route, so that engine, when revolving speed is lower, compressor also can normally be situated between
Enter work, improves turbo lag phenomenon, improve the dynamic property of engine.
Another object of the present invention is to have designed and developed a kind of turbocharger sluggishness improvement dress based on hydrodynamic compensation
The control method set can acquire engine speed and secondary speed, and determine arrangement of clutch and high pressure based on BP neural network
The working condition of water pump.
The present invention can also be when clutch apparatus and high-pressure hydraulic pump work, and the accurate operating power for controlling high-pressure hydraulic pump makes
Engine is obtained when revolving speed is lower, compressor also can normally intervene work, improve turbo lag phenomenon, improve the dynamic of engine
Power.
Technical solution provided by the invention are as follows:
A kind of turbocharger sluggishness improvement device based on hydrodynamic compensation, comprising:
Engine；And
Turbine is arranged at the exhaust passage of the engine, in being rotated by for emission；
Compressor, impeller are arranged at the inlet channel of the engine, and coaxially connected with the turbine, and with institute
State turbine synchronous rotation；
High speed water wheels are co-axially located between the turbine and the compressor impeller, and can be selected with the turbine
The connection or disconnection of selecting property；
High-pressure hydraulic pump is connect by work water route with the high speed water wheels, for driving the high speed water wheel to rotate；
Wherein, the high speed water wheels are arranged in the work water route.
Preferably, further includes:
Turbine wheel shaft, the coaxially connected turbine and the compressor, and the high speed water wheel case is provided at the whirlpool
On turbine wheel shaft between wheel and the compressor；
Arrangement of clutch is arranged between the high speed water wheels and turbine wheel shaft, connection or disconnection institute for selectivity
State turbine wheel shaft and the high speed water wheels.
Preferably, further include air cleaner, be arranged at the inlet channel of the engine, for air inlet into
Row filtering.
Preferably, multiple cylinders, the inlet manifold of the cylinder and the inlet channel are provided in the engine
Connection, the exhaust manifold of the cylinder are connected to the exhaust passage.
Preferably, further includes:
Multiple speed probes are separately positioned on the engine and the turbine, for detecting engine speed
And secondary speed；
Controller is connect with the speed probe, arrangement of clutch and high-pressure hydraulic pump, for receiving the revolution speed sensing
The detection data of device, and control the arrangement of clutch and high-pressure hydraulic pump work.
A kind of turbocharger sluggishness based on hydrodynamic compensation improves the control method of device, acquires engine speed and whirlpool
Wheel speed, and determine based on BP neural network the working condition of arrangement of clutch and high-pressure hydraulic pump, specifically comprise the following steps:
Step 1: passing through sensor measurement engine speed and secondary speed according to the sampling period；
Step 2: determining input layer vector x={ x of three layers of BP neural network1,x2}；Wherein, x1For engine
Revolving speed, x2For secondary speed；
Step 3: the input layer DUAL PROBLEMS OF VECTOR MAPPING is to hidden layer, the neuron of hidden layer is m；
Step 4: obtaining output layer neuron vector o={ o1,o2}；Wherein, o1For the working condition of arrangement of clutch, o2For
The working condition of high-pressure hydraulic pump, the output layer neuron value areK be output layer neuron sequence number, k=1,
2 }, work as okWhen being 1, it is now in working condition, works as okWhen being 0, it is now in off position.
Preferably, work as ne< n0When, o1=1, o2=1, and control the operating power of high-pressure hydraulic pump are as follows:
In formula, nw=f (v), PwFor the operating power of high-pressure hydraulic pump, n is the water pipe tube wall roughness of work water route, and L is work
Make the water pipe total length in water route, D is the water pipe internal diameter of work water route, and K is the working efficiency of high-pressure hydraulic pump, n0For turning for engine
Fast given threshold, neFor the revolving speed of engine, ntFor the revolving speed of turbine, nwFor the revolving speed of high speed water wheels, v is water in work water route
Flow velocity, f () be work water route high speed water wheels revolving speed and water flow velocity relation function.
Preferably, work as ne≥n0, o1=0, o2=1.Preferably, the neuron of the hidden layer is 2；The hidden layer
And the excitation function of the output layer is all made of S type function fj(x)=1/ (1+e-x)。
It is of the present invention the utility model has the advantages that
(1) the turbocharger sluggishness based on hydrodynamic compensation that the present invention designs and develops improves device, by turbine and
High speed water wheels are set between compressor impeller, and high speed water wheels selectively can connect or be disconnected with turbine, and pass through work
The rotation of high speed water wheels is realized in water route, so that engine, when revolving speed is lower, compressor also can normally intervene work, improves whirlpool
Hysteresis phenomenon is taken turns, the dynamic property of engine is improved.
(2) the turbocharger sluggishness based on hydrodynamic compensation that the present invention designs and develops improves the control method of device, energy
Engine speed and secondary speed are enough acquired, and determines the working condition of arrangement of clutch and high-pressure hydraulic pump based on BP neural network.
The present invention can also be when clutch apparatus and high-pressure hydraulic pump work, the accurate operating power for controlling high-pressure hydraulic pump, so that engine
When revolving speed is lower, compressor also can normally intervene work, improve turbo lag phenomenon, improve the dynamic property of engine.
Detailed description of the invention
Fig. 1 is the schematic diagram that the turbocharger sluggishness of the present invention based on hydrodynamic compensation improves device.
Fig. 2 is the partial enlargement diagram that the turbocharger sluggishness of the present invention based on hydrodynamic compensation improves device.
Fig. 3 is the partial enlargement structural representation that the turbocharger sluggishness of the present invention based on hydrodynamic compensation improves device
Figure.
Fig. 4 is the structural schematic diagram of high speed water wheels of the present invention.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
As shown in Figs 1-4, the present invention provides a kind of turbocharger sluggishness improvement device based on hydrodynamic compensation, comprising:
Multiple cylinders are arranged inside in engine 100, and the inlet manifold of all cylinders is connected to the inlet channel 110 of engine, institute
There is the exhaust manifold of cylinder to be connected to the exhaust passage 120 of engine；Whirlpool is provided at the exhaust passage 120 of engine 100
Wheel 130 is equivalent to the power for rotating the power-conversion of tail gas for turbine 130 in being rotated by for emission；It is sending out
The impeller 140 of compressor is provided at the inlet channel 110 of motivation 100, the impeller 140 and turbine 130 are same by turbine wheel shaft 131
Axis connection, and rotated synchronously with turbine 130.Therefore, in exhaust emissions, the power drive turbine 130 of tail gas is rotated and then is driven
Coaxially connected compressor impeller 140 rotates, and realizes plenum.Since exhaust gas turbocharge has recycled exhaust energy,
So the economy of internal combustion engine is all better than engine driven supercharging and naturally aspirated engine.
High speed water wheels 150 are coaxially arranged between turbine 130 and compressor impeller 140, the high speed water wheels 150 are logical
It crosses arrangement of clutch 200 to be set on turbine wheel shaft 131, high speed water wheels 150 is enabled to by the connection or disconnection of arrangement of clutch
With the connection or disconnection of 130 selectivity of turbine；And the high speed water wheels are connected to work water route 160, and with high-pressure hydraulic pump 170
It is connected to by work water route, by controlling the operating power of high-pressure hydraulic pump 170, the flow of high-pressure hydraulic pump 170 can be controlled, in turn
The flow velocity of water in work water route 160 is controlled, realizes the control of 150 revolving speed of high speed water wheels.
It further include first shell 132 and second shell 141, for accommodating turbine 130 and compressor respectively in the present embodiment
Impeller 140, further include third shell 151, for accommodating high speed water wheels 150, set respectively in the upper and lower ends of third shell 151
Be equipped with water inlet 1511 and water outlet 1512, and be connected to by work water route 160, by control the flow of high-pressure hydraulic pump 170 into
And the revolving speed of high speed water wheels 150 is controlled, the third shell 151 is arranged between first shell 132 and second shell 141, institute
It is rotatable across 151 work water route 160 of third shell to state turbine wheel shaft 131, and the rotatable support in both ends is arranged in first shell 132
In second shell 141.On the turbine wheel shaft 131 between first shell 132 and work water route 160 (i.e. turbine wheel shaft 131 with
Third shell 151 is rotatably connected place) fixing sleeve is equipped with the first floating bearing 133, positioned at second shell 141 and working water
(i.e. turbine wheel shaft 131 and third shell 151 be rotatably connected place) fixing sleeve is equipped with second on turbine wheel shaft 131 between road 160
Floating bearing 142 at the two sides that turbine wheel shaft 131 passes through third shell 151 and is located at the first floating bearing 133 and the second floating
It is arranged with sealing ring 152 on turbine wheel shaft 131 between bearing 142, high speed water wheels 150 are sealingly disposed in third shell 151.
Since turbine is fluid machinery, revolving speed depends on exhaust flow rate, when internal combustion engine works at the low rotational speed, exhaust stream
Speed is low, so that compressor (i.e. turbocharger) can not be intervened, combustion engine powered property is poor at this time.At this point, control arrangement of clutch
Work, so that high speed water wheels 150 and turbine wheel shaft 131 connect, control high-pressure hydraulic pump 170 works, and high speed water wheels 150 is driven to move,
And then coaxially connected turbine 130 and compressor impeller 140 is driven to rotate, realize the plenum of compressor, and improve turbine
The hysteresis of booster.
When internal-combustion engine rotational speed is in the reasonable range of speeds, turbocharger can be operated normally by exhaust energy,
At this point, control high speed water wheels 150 and turbine wheel shaft 131 disconnect, at this point, work water route 160 enters refrigerating mode, without excessive stream
Amount, control high-pressure hydraulic pump 170 are run with lower-wattage.
In the present embodiment, further includes air cleaner 180, be arranged at the inlet channel 110 of engine 100, be used for
Air inlet is filtered, the granulometric impurity in air is removed.
In the present embodiment, further includes multiple speed probes, be separately positioned on engine 100 and turbine 130, be used for
Detect 100 revolving speed of engine and 130 revolving speed of turbine；Controller 190 connects with speed probe, arrangement of clutch and high-pressure hydraulic pump
It connects, for receiving the detection data of speed probe, and controls arrangement of clutch and high-pressure hydraulic pump work.
The turbocharger sluggishness based on hydrodynamic compensation that the present invention designs and develops improves device, by turbine and calming the anger
High speed water wheels are set between machine impeller, and high speed water wheels selectively can connect or be disconnected with turbine, and pass through work water route
It realizes the rotation of high speed water wheels, so that engine, when revolving speed is lower, compressor also can normally intervene work, it is slow to improve turbine
Stagnant phenomenon improves the dynamic property of engine.
The turbocharger sluggishness based on hydrodynamic compensation that the present invention also provides a kind of improves the control method of device, acquisition hair
Motivation revolving speed and secondary speed, and determine based on BP neural network the working condition of arrangement of clutch and high-pressure hydraulic pump, it specifically includes
Following steps:
Step 1: establishing BP neural network model.
Totally interconnected connection is formed on BP model between the neuron of each level, is not connected between the neuron in each level
It connects, the output of input layer is identical as input, i.e. oi=xi.The operating characteristic of the neuron of intermediate hidden layer and output layer
For
opj=fj(netpj)
Wherein p indicates current input sample, ωjiFor from neuron i to the connection weight of neuron j, opiFor neuron
The current input of j, opjIt is exported for it；fjFor it is non-linear can micro- non-decreasing function, be generally taken as S type function, i.e. fj(x)=1/ (1
+e-x)。
For the BP network architecture that the present invention uses by up of three-layer, first layer is input layer, total n node, corresponding
Indicate that n detection signal of equipment working state, these signal parameters are provided by data preprocessing module；The second layer is hidden layer,
Total m node is determined in an adaptive way by the training process of network；Third layer is output layer, total p node, by system
Actual needs output in response to determining that.
The mathematical model of the network are as follows:
Input vector: x=(x1,x2,...,xn)T
Middle layer vector: y=(y1,y2,...,ym)T
Output vector: o=(o1,o2,...,op)T
In the present invention, input layer number is n=2, and output layer number of nodes is p=2, hidden layer number of nodes m=2.
2 parameters of input layer respectively indicate are as follows: x1For engine speed, x2For secondary speed；
2 parameters of output layer respectively indicate are as follows: o1For the working condition of arrangement of clutch, o2For the working condition of high-pressure hydraulic pump,
The output layer neuron value isK is output layer neuron sequence number, and k={ 1,2 } works as okWhen being 1, it is now in
Working condition works as okWhen being 0, it is now in off position.
Step 2: carrying out the training of BP neural network.
After establishing BP neural network nodal analysis method, the training of BP neural network can be carried out.It is passed through according to the history of product
Test the sample of data acquisition training, and the connection weight between given input node i and hidden layer node j, hidden node j and defeated
Connection weight between node layer k out.
(1) training method
Each subnet is using individually trained method；When training, first have to provide one group of training sample, each of these sample
This, to forming, when all reality outputs of network and its consistent ideal output, is shown to train by input sample and ideal output
Terminate；Otherwise, by correcting weight, keep the ideal output of network consistent with reality output；
(2) training algorithm
BP network is trained using error back propagation (Backward Propagation) algorithm, and step can be concluded
It is as follows:
Step 1: a selected structurally reasonable network, is arranged the initial value of all Node B thresholds and connection weight.
Step 2: making following calculate to each input sample:
(a) forward calculation: to l layers of j unit
In formula,L layers of j unit information weighted sum when being calculated for n-th,For l layers of j units with it is previous
Connection weight between the unit i of layer (i.e. l-1 layers),For preceding layer (i.e. l-1 layers, number of nodes nl-1) unit i send
Working signal；When i=0, enableFor the threshold value of l layers of j unit.
If the activation primitive of unit j is sigmoid function,
And
If neuron j belongs to the first hidden layer (l=1), have
If neuron j belongs to output layer (l=L), have
And ej(n)=xj(n)-oj(n)；
(b) retrospectively calculate error:
For output unit
To hidden unit
(c) weight is corrected:
η is learning rate.
Step 3: new sample or a new periodic samples are inputted, and until network convergence, the sample in each period in training
Input sequence is again randomly ordered.
BP algorithm seeks nonlinear function extreme value using gradient descent method, exists and falls into local minimum and convergence rate is slow etc.
Problem.A kind of more efficiently algorithm is Levenberg-Marquardt optimization algorithm, it makes the e-learning time shorter,
Network can be effectively inhibited and sink into local minimum.Its weighed value adjusting rate is selected as
Δ ω=(JTJ+μI)-1JTe
Wherein J is error to Jacobi (Jacobian) matrix of weight differential, and I is input vector, and e is error vector,
Variable μ is the scalar adaptively adjusted, for determining that study is completed according to Newton method or gradient method.
In system design, system model is one merely through the network being initialized, and weight needs basis using
The data sample obtained in journey carries out study adjustment, devises the self-learning function of system thus.Specify learning sample and
In the case where quantity, system can carry out self study, to constantly improve network performance.
(1) work as ne< n0When, o1=1, o2=1, and control the operating power of high-pressure hydraulic pump are as follows:
In formula, nw=f (v), PwFor the operating power of high-pressure hydraulic pump, n is the water pipe tube wall roughness of work water route, and L is work
Make the water pipe total length in water route, D is the water pipe internal diameter of work water route, and K is the working efficiency of high-pressure hydraulic pump, n0For turning for engine
Fast given threshold, neFor the revolving speed of engine, ntFor the revolving speed of turbine, nwFor the revolving speed of high speed water wheels, v is water in work water route
Flow velocity, f () be work water route high speed water wheels revolving speed and water flow velocity relation function.
(2) work as ne≥n0, o1=0, o2=1 at this time work water route enter refrigerating mode, without excessive flow, control is high
Water pump 170 is run with lower-wattage.
It should be noted that the relation function f () of the flow velocity of the revolving speed and water of work water route high speed water wheels is to pass through reality
It tests and is obtained according to the flow velocity of the water in work water route and the specific experiment numerical fitting of high speed water wheels, therefore different water pipes and impeller
It needs to be fitted again, before work water route access device, the revolving speed and water of high speed water wheels is obtained by experimental fit
The relation function f () of flow velocity.And water pump works in rated operating range, when the operating power of the water pump of acquisition is more than water
When the maximum rated power of pump, worked with maximum rated power.
Further the method provided by the invention to engine technology state is carried out below with reference to specific embodiment
Explanation.
It is fitted the work of 10 groups of different engines, the slow-speed of revolution threshold value of engine is set as 1300r/min, uses
The maximum rated power of high-pressure hydraulic pump is 10kW, and water pipe total length 2m in work water route surrounds square, each side length is
0.5m, water pipe internal diameter are 10cm, and the radius of quick runner is 4.5cm, and the revolving speed of work water route high speed water wheels and water
The relation function of flow velocityWherein, r is the radius of quick runner.Specific test data such as 1 institute of table
Show.
1 test data of table
| Serial number | Engine speed (r/min) |
| 1 | 950 |
| 2 | 750 |
| 3 | 1000 |
| 4 | 1030 |
| 5 | 900 |
| 6 | 1300 |
| 7 | 700 |
| 8 | 800 |
| 9 | 1350 |
| 10 | 1000 |
The turbocharger sluggishness based on hydrodynamic compensation provided according to the present invention improves the control method of device, to turbine
Booster carries out hydrodynamic compensation, and concrete outcome is as shown in table 2.
2 hydrodynamic compensation result of table
By table 2 it is recognised that when the engine speed is lower when, high-pressure hydraulic pump, which can do work, drives quick runner to rotate,
So that compressor also can normally intervene work, improves turbo lag phenomenon, improve the dynamic property of engine.
The turbocharger sluggishness based on hydrodynamic compensation that the present invention designs and develops improves the control method of device, can adopt
Collect engine speed and secondary speed, and determines the working condition of arrangement of clutch and high-pressure hydraulic pump based on BP neural network.This hair
It is bright accurately to control the operating power of high-pressure hydraulic pump when clutch apparatus and high-pressure hydraulic pump work, so that engine is turning
When speed is lower, compressor also can normally intervene work, improve turbo lag phenomenon, improve the dynamic property of engine.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (9)
1. a kind of turbocharger sluggishness based on hydrodynamic compensation improves device characterized by comprising
Engine；And
Turbine is arranged at the exhaust passage of the engine, in being rotated by for emission；
Compressor, impeller are arranged at the inlet channel of the engine, and coaxially connected with the turbine, and with the whirlpool
Wheel rotates synchronously；
High speed water wheels are co-axially located between the turbine and the compressor impeller, and can be selective with the turbine
Connection or disconnection；
High-pressure hydraulic pump is connect by work water route with the high speed water wheels, for driving the high speed water wheel to rotate.
2. the turbocharger sluggishness based on hydrodynamic compensation improves device as described in claim 1, which is characterized in that also wrap
It includes:
Turbine wheel shaft, the coaxially connected turbine and the compressor, and the high speed water wheel case be provided at the turbine and
On turbine wheel shaft between the compressor；
Arrangement of clutch is arranged between the high speed water wheels and turbine wheel shaft, connection or the disconnection whirlpool for selectivity
Wheel shaft and the high speed water wheels.
3. the turbocharger sluggishness based on hydrodynamic compensation improves device as claimed in claim 1 or 2, which is characterized in that also
Including air cleaner, it is arranged at the inlet channel of the engine, for being filtered to air inlet.
4. the turbocharger sluggishness based on hydrodynamic compensation improves device as claimed in claim 3, which is characterized in that the hair
Multiple cylinders are provided in motivation, the inlet manifold of the cylinder is connected to the inlet channel, the exhaust manifold of the cylinder
It is connected to the exhaust passage.
5. the turbocharger sluggishness based on hydrodynamic compensation improves device as claimed in claim 2, which is characterized in that also wrap
It includes:
Multiple speed probes are separately positioned on the engine and the turbine, for detecting engine speed and whirlpool
Wheel speed；
Controller is connect with the speed probe, arrangement of clutch and high-pressure hydraulic pump, for receiving the speed probe
Detection data, and control the arrangement of clutch and high-pressure hydraulic pump work.
6. the control method that a kind of turbocharger sluggishness based on hydrodynamic compensation improves device, which is characterized in that acquisition is started
Machine revolving speed and secondary speed, and determine based on BP neural network the working condition of arrangement of clutch and high-pressure hydraulic pump, specifically include as
Lower step:
Step 1: passing through sensor measurement engine speed and secondary speed according to the sampling period；
Step 2: determining input layer vector x={ x of three layers of BP neural network1,x2}；Wherein, x1For engine speed,
x2For secondary speed；
Step 3: the input layer DUAL PROBLEMS OF VECTOR MAPPING is to hidden layer, the neuron of hidden layer is m；
Step 4: obtaining output layer neuron vector o={ o1,o2}；Wherein, o1For the working condition of arrangement of clutch, o2For high pressure
The working condition of water pump, the output layer neuron value areK is output layer neuron sequence number, and k={ 1,2 } works as ok
When being 1, it is now in working condition, works as okWhen being 0, it is now in off position.
7. the turbocharger sluggishness based on hydrodynamic compensation improves the control method of device, feature as claimed in claim 6
It is, works as ne< n0When, o1=1, o2=1, and control the operating power of high-pressure hydraulic pump are as follows:
In formula, nw=f (v), PwFor the operating power of high-pressure hydraulic pump, n is the water pipe tube wall roughness of work water route, and L is working water
The water pipe total length on road, D are the water pipe internal diameter of work water route, and K is the working efficiency of high-pressure hydraulic pump, n0For the slow-speed of revolution of engine
Given threshold, neFor the revolving speed of engine, ntFor the revolving speed of turbine, nwFor the revolving speed of high speed water wheels, v is water in work water route
Flow velocity, f () are the relation function of the revolving speed of work water route high speed water wheels and the flow velocity of water.
8. the turbocharger sluggishness based on hydrodynamic compensation as claimed in claims 6 or 7 improves the control method of device, special
Sign is, works as ne≥n0, o1=0, o2=1.
9. the turbocharger sluggishness based on hydrodynamic compensation improves the control method of device, feature as claimed in claim 8
It is, the neuron of the hidden layer is 2；The excitation function of the hidden layer and the output layer is all made of S type function fj(x)=
1/(1+e-x)。
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