CN104111650B - Dual-fuel engine controller simulation test system - Google Patents
Dual-fuel engine controller simulation test system Download PDFInfo
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- CN104111650B CN104111650B CN201410299014.8A CN201410299014A CN104111650B CN 104111650 B CN104111650 B CN 104111650B CN 201410299014 A CN201410299014 A CN 201410299014A CN 104111650 B CN104111650 B CN 104111650B
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Abstract
The invention discloses a dual-fuel engine controller simulation test system, and is used for realizing an HIL test of an HPDI engine controller. The system includes a real-time simulator and an engine controller, wherein the real-time simulator is used for operating an environmental model, a driver model and a full vehicle model, sending vehicle environment parameters output by the environmental model, driver behavior parameters output by the driver model and each vehicle operating parameter output by the full vehicle model to the engine controller, and receiving a control signal sent by the engine controller, and continuing to operate the environmental model, the driver model and the full vehicle model according to the control signal, and the full vehicle model includes a dual-fuel engine model (including a gas circuit model, a fuel supply model, a cylinder combustion model, and a heat balance model), an accessory model, a drive system model, and a vehicle longitudinal power model. The engine controller is used for determining the operating condition of the engine according to the vehicle environment parameters, the driver behavior parameters and the vehicle operating parameters and generating and sending the control signal.
Description
Technical field
The present invention relates to field of engine control, and in particular to a kind of dual fuel engine controller simulation test system.
Background technology
The exploitation of vehicle motor ECU (Electronic Control Unit, electronic control unit) generally adopts system
Demand, conceptual design, application software modeling, application layer and bottom code is integrated, software test, the modern V process modes of checking.
Carrying out to Engine ECU in test process, traditional stand, car load on-line testing verification mode expend substantial amounts of manpower thing
Power, problem are difficult reproduction, it is difficult to operational limit operating mode and dangerous factor；And the manual signal generator of open loop can not
Simulation dynamic, closed loop operating mode.And HIL (Hardware-In-Loop, hardware in loop) emulation testing, it is imitative by plant model
Genuine mode is capable of achieving that dynamic test closed loop test, test process be repeatable, simulation limit work simulating real running environment
Condition, automatically test, good economy performance, safety, are a very important links in Engine ECU exploitation.
In the prior art, Engine ECU HIL emulation test system is based on single-fuel engine, such as diesel engine
ECU HIL test systems, mainly carry out simulated diesel engine with diesel engine mean value model.But, a kind of new HPDI
(High Pressure Direct Injection, high pressure direct injection) natural gas, Diesel Dual-Fuel Engine are using diesel oil ignited
Mode come realize natural gas in-cylinder direct-jet technology and can be with the conversion of operating mode switching fuel mode, its control be related to bavin
Oil, natural gas double-fuel, it is more complicated than traditional single-fuel engine control logic.Existing single-fuel engine ECU
HIL simulating schemes cannot meet the HIL testing requirements of high pressure direct injection natural gas, Diesel Dual-Fuel Engine ECU, i.e., in existing skill
HIL test systems in art not for high pressure direct injection dual fuel engine ECU.
The content of the invention
In view of this, the present invention provides a kind of dual fuel engine controller simulation test system, so as to realize high straightening
The HIL tests of jet natural gas, Diesel Dual-Fuel Engine ECU.
To solve the above problems, the technical scheme that the present invention is provided is as follows：
A kind of dual fuel engine controller simulation test system, the system include：
Real-time simulation machine and engine controller；
The real-time simulation machine is used for running environment model, pilot model and whole vehicle model, the whole vehicle model bag
Include dual fuel engine model, accessory model, actuation system models, longitudinal direction of car dynamic model；The dual fuel engine mould
Type includes gas circuit model, fuel supply model, cylinder combustion model, thermal balance model；The fuel supply model is used to calculate
Diesel oil rail pressure, natural gas rail pressure, diesel oil distributive value and natural gas injection amount；The cylinder combustion model include torque model with
And exhaust gas constituents model, for calculating the output torque of electromotor, the exhaust gas constituents model is used to calculate the torque model
Exhaust gas constituents；
The real-time simulation machine for the environmental model is exported vehicle environmental parameter, the pilot model output
Driving behavior parameter and the whole vehicle model output each vehicle operating parameters be sent to the engine controller；
The control signal that the engine controller sends is received, environmental model, driver's mould are continued to run with according to the control signal
Type and whole vehicle model；
The engine controller is for according to the vehicle environmental parameter, the driving behavior parameter and the car
Operational factor determines engine operating condition and performs control logic and generate control signal, and the control signal is sent to the reality
When replicating machine.
Accordingly, the fuel supply model includes：
Diesel injector model, diesel oil high-pressure oil pump model, diesel oil rail model, natural gas rail model and natural gas injection
Valve model；
The diesel injector model is for according to the diesel injection pulsewidth and diesel oil rail pressure for collecting, calculating diesel oil
Distributive value is simultaneously exported to the diesel oil rail model；
The diesel oil high-pressure oil pump model is used to calculate high-pressure oil pump pump oil amount using qualitative modeling and export to described
Diesel oil rail model；
The diesel oil rail model is for according to the diesel oil distributive value and the high-pressure oil pump pump oil amount, calculating diesel oil rail
Press and export to the diesel injector model and the natural gas rail model；
The natural gas rail model is for according to diesel oil rail pressure acquisition natural gas rail pressure；
The gas injector model is for according to the natural gas injection pulsewidth and the natural gas rail for collecting
Pressure, calculates natural gas injection amount.
Accordingly, the diesel oil rail model specifically for：
According to equation of continuity：Calculate diesel oil rail pressure P and export to the diesel injector mould
Type and the natural gas rail model；Wherein, QinIt is the diesel oil flow into diesel oil rail, is according to the high-pressure oil pump pump oil amount
Obtain；QoutTo flow out the diesel oil flow of diesel oil rail, obtained according to the diesel oil distributive value Conversion of measurement unit；E is diesel oil
Elastic modelling quantity；Volumes of the V for diesel oil rail.
Accordingly, the torque model includes：
Prompting moment of torsion obtaining unit, for the natural gas injection amount to be converted to the equivalent diesel oil matter for producing same moment of torsion
Amount, obtains prompting moment of torsion according to the equivalent diesel quality and the diesel oil distributive value sum；
Friction torque obtaining unit, for searching friction torque arteries and veins spectrogram and obtaining according to engine water temperature, engine speed
Friction torque；
Moment of torsion obtaining unit, turns round for calculating output of the prompting moment of torsion with the friction torque sum as electromotor
Square.
Accordingly, the prompting moment of torsion obtaining unit includes：
First obtains subelement, be added with compensation dosage for adopting the natural gas injection amount is multiplied with conversion coefficient again
Mode obtain the natural gas injection amount and be converted to the equivalent diesel quality for producing same moment of torsion；
Second obtains subelement, for being turned with the diesel oil distributive value sum, electromotor according to the equivalent diesel quality
Quick checking looks for prompting moment of torsion arteries and veins spectrogram to obtain prompting moment of torsion.
Accordingly, the prompting moment of torsion obtaining unit also includes：
Revise subelemen, obtains for searching prompting torque correction factor arteries and veins spectrogram according to engine speed, injection advance angle
Torque correction factor must be pointed out；Prompting moment of torsion and the prompting torque correction factor phase that subelement is obtained is obtained by described second
Take advantage of as prompting moment of torsion.
Accordingly, the conversion coefficient is to search natural gas according to engine speed, gas pedal aperture to turn diesel oil conversion
What coefficient arteries and veins spectrogram was obtained；The compensation dosage is to search natural gas according to engine speed, gas pedal aperture to turn diesel oil compensation
Amount arteries and veins spectrogram is obtained.
Accordingly, the gas circuit model includes：
Supercharger model, throttle model, inlet manifold model, air inlet Component Model, exhaust manifold model and EGR valve
Model；
The pressure and temperature that the supercharger model is used for after calculating engine booster；
The throttle model determines throttle opening for the throttle orifice equation based on constant entropy adiabatic process；
The EGR valve model determines EGR valve aperture for the throttle orifice equation based on constant entropy adiabatic process；
The air inlet Component Model is used to calculate the air ratio in air inlet.
Accordingly, the exhaust gas constituents model is specifically for calculating air ratio and the fuel oil ratio in waste gas in waste gas
Rate.
Accordingly, the thermal balance model is used for by Heat balance calculation water inflow of the engine temperature and leaving water temperature.
Accordingly, the actuation system models include：Identification loop model, clutch model, speed change box model and master
Speed reducer differential device model；
The longitudinal vehicle dynamic model includes：Car load load module and car load rate pattern；
The accessory model includes：Starter motor model, battery model and air-conditioning model.
As can be seen here, the embodiment of the present invention has the advantages that：
The hardware-in-the-loop test system of diesel oil provided in an embodiment of the present invention, natural gas double fuel engine controller
System, by building controller plant model, plant model includes environmental model, pilot model and car load mould
Dual fuel engine model in type, particularly whole vehicle model (include gas circuit model, fuel supply model, cylinder combustion model,
Thermal balance model), the emulation to dual fuel engine can be completed, so as to realize to diesel oil ignited, natural gas straight fuel-injection engine
The closed loop test of controller, dynamic test, can simulate different operating mode scenes：Start, mutation is loaded, engine rig test
The static state dynamic operation condition such as circulation, car load driving cycle, demarcated with the control parameter for completing HPDI dual fuel engine controllers in advance,
Functional test, durable test etc., with safety, economy, low cost and other advantages.In addition, cylinder combustion model is using by natural gas
The mode of diesel oil is converted into, is realized simple effective and is conducive to being changed in existing Diesel Engine Model immediately above, save people
Power, raising efficiency.
Description of the drawings
Fig. 1 is the signal of dual fuel engine controller simulation test system embodiment provided in an embodiment of the present invention
Figure；
Fig. 2 is the signal of dual fuel engine controller simulation test system embodiment provided in an embodiment of the present invention two
Figure；
Fig. 3 is the schematic diagram of whole vehicle model embodiment in the embodiment of the present invention；
Fig. 4 is the schematic diagram of dual fuel engine model embodiment in the embodiment of the present invention；
Fig. 5 is the schematic diagram of gas circuit model embodiment in the embodiment of the present invention；
Fig. 6 is the schematic diagram of fuel supply model embodiment in the embodiment of the present invention；
Fig. 7 is the schematic diagram of torque model embodiment in the embodiment of the present invention；
Fig. 8 is the operation principle schematic diagram of torque model embodiment in the embodiment of the present invention.
Specific embodiment
It is understandable to enable the above objects, features and advantages of the present invention to become apparent from, it is below in conjunction with the accompanying drawings and concrete real
Apply mode to be described in further detail the embodiment of the present invention.
The technical problem of the HIL test systems for not being directed to high pressure direct injection dual fuel engine ECU in prior art,
The embodiment of the present invention provides a kind of emulation test system for dual fuel engine controller, it is possible to achieve HPDI electromotors
Dynamic Closed Loop test, limiting condition test, automatically test, repeatable test in ECU development processes, with safety, economy,
Low cost and other advantages.
It is shown in Figure 1, it is dual fuel engine controller simulation test system embodiment provided in an embodiment of the present invention
One, the system can include：
Real-time simulation machine 101 and engine controller 102.
Real-time simulation machine is used for running environment model 1011, pilot model 1012 and whole vehicle model 1013.
Wherein, environmental model can export various vehicle environmental parameters with simulating vehicle external environment condition, for example, transported according to vehicle
Row chainage determines the vehicle environmental parameters such as height above sea level, road-adhesion coefficient, road grade, atmospheric pressure temperature, wind speed.
Pilot model is mainly used in the realization of driving test cycle, enters according to the speed of driving cycle and the curve of time
Row car load runs, and pilot model can carry out clutch operation, throttle action and the switching of gear automatically.Can be by being input into car
Speed, engine speed, car load resistance, engine output torque, change speed gear box input torque, clutch rotational speed etc., output throttle are opened
The driving behavior parameters such as degree, brake aperture, clutch aperture, gear, activate switch, ignition switch, air-conditioning switch.
Real-time simulation machine for environmental model is exported vehicle environmental parameter, pilot model output driving behavior
Each vehicle operating parameters of parameter and whole vehicle model output are sent to engine controller；And receive engine controller
The control signal sent, continues to run with environmental model, pilot model and whole vehicle model according to control signal.
Engine controller is engine electronic control unit ECU for being joined according to vehicle environmental parameter, driving behavior
Count and vehicle operating parameters determine engine operating condition and perform control logic generation control signal, send control signals to reality
When replicating machine.
In actual applications, it is shown in Figure 2, it is that dual fuel engine controller simulation provided in an embodiment of the present invention is surveyed
Test system embodiment two, real-time simulation machine and Engine ECU can be connected with user's host computer, real-time simulation machine with start
It is connected by input and output I O board card between machine controller, load box in emulation test system, can also be included.User's host computer
Examination when real-time simulation is tested can be run with runtime configuration software, matched environment software (such as MATLAB/Simulink etc.)
Environment software is tested, correlated variabless, parameter in each model is detected, after the compiling of environmental model, pilot model and whole vehicle model
Generate during code downloads to real-time simulation machine and run.Real-time simulation machine running environment model, pilot model and whole vehicle model,
Vehicle environmental parameter, the driving behavior parameter of pilot model output and car load environmental model exported by I O board card
Each vehicle operating parameters of model output are converted to sensor physics signal and are sent to engine controller, electromotor control
Device operation needs input signal, by the input of sensor signal (such as engine speed, accelerator open degree, water temperature, rail pressure etc.), complete
Into operating mode judgement and the execution of control decision, and then the corresponding drive signal of output is control signal, and control signal is by IO
Board is exported and is performed to each model in real-time simulation machine and/or load box, and load box can be used to fill real load or mould
Intend load (load board), real-time simulation machine can update environmental model, pilot model and car load mould according to control signal
The operation of type, so as to realize the test to engine controller closed loop control.
Shown in Figure 3, in some embodiments of the invention, above-mentioned whole vehicle model can include dual fuel engine mould
Type 301, accessory model 302, actuation system models 303, longitudinal direction of car dynamic model 304.
Actuation system models can include：Identification loop model, clutch model, speed change box model and main reducing gear are poor
Fast device model；Actuation system models can pass through the angle speed for being input into engine output torque, engine moment inertia, each wheel
Output engine rotating speed, clutch rotational speed, change speed gear box input torque, each wheel torque such as degree etc..Longitudinal direction of car kinetic simulation
Type can include：Car load load module and car load rate pattern；Longitudinal direction of car dynamic model can be by being input into each wheel
Moment of torsion, wind speed, brake aperture, environmental density, the output speed such as road grade, vehicle mileage, vehicle drag, each wheel angle
Speed.Accessory model can include：Starter motor model, battery model and air-conditioning model etc., can export igniting switching signal,
Activate switch signal, air-conditioning switch signal, engine speed, accessory torque etc..
Shown in Figure 4, in some embodiments of the invention, above-mentioned dual fuel engine model can include gas circuit mould
Type 401, fuel supply model 402, cylinder combustion model 403, thermal balance model 404；Fuel supply model 402 can be used for meter
Calculate diesel oil rail pressure, natural gas rail pressure, diesel oil distributive value and natural gas injection amount.Cylinder combustion model 403 can include moment of torsion
Model 4031 and exhaust gas constituents model 4032, torque model can be used for the output torque for calculating electromotor, exhaust gas constituents mould
Type can be used for calculating exhaust gas constituents.
Dual fuel engine model is the core for realizing the test of dual fuel engine controller simulation, individually below to double combustions
Gas circuit model, fuel supply model, cylinder combustion model and thermal balance model 404 in material engine mockup is carried out specifically
It is bright.
Shown in Figure 5, in some embodiments of the invention, gas circuit model can include：Supercharger model 501, section
Valve model 502, inlet manifold model 503, air inlet Component Model 504, exhaust manifold model 505 and EGR valve model 506.
Wherein, supercharger model is used to calculate the pressure and temperature after engine booster, specifically, can based on rotating speed and
The MAP (i.e. arteries and veins spectrogram) of the total oil mass of diesel oil carries out PT1 filtering again, calculates pressure and temperature after supercharging, with simulating engine temperature
The slowly varying process of pressure.
Throttle model determines throttle opening for the throttle orifice equation based on constant entropy adiabatic process；EGR valve model is used
EGR valve aperture is determined in the throttle orifice equation based on constant entropy adiabatic process.Specifically, throttle model and EGR valve model
To be modeled based on below equation：
Wherein,To flow through the mass flow of throttle orifice (or EGR valve), unit is kg/s, and μ is discharge coefficient, and A (α) is
Stream function, k is adiabatic coefficent, POFor outlet pressure, PIFor inlet pressure, α is throttle angle, and R is gaseous state constant.
Inlet manifold model, exhaust manifold model can carry out zero dimension modeling using " filling row's method " method, be kept using quality
Permanent equation, energy conservation equation and the equation of gas state." filling row's method " full of-exhaust method, is called volumetric method.Really handle
Air inlet-outlet pipe regards a simple receptacle suitable with original piping volume as, and unstable flow process is reduced to quasi-steady
Flow into or from process.
Air inlet Component Model is used to calculate the air ratio in air inlet.Specifically can be calculated by below equation：Air inlet is empty
Gas ratio=(air throttle mass flow+waste gas air ratio * EGR quality flow)/(air throttle mass flow+EGR quality stream
Amount).
Shown in Figure 6, in some embodiments of the invention, fuel supply model can include：
Diesel injector model 601, diesel oil rail model 602, diesel oil high-pressure oil pump model 603, natural gas rail model 604 with
And gas injector model 605；
Wherein, diesel injector model is for the diesel injection pulsewidth that collected according to I/O interface hardware and diesel oil rail
Pressure, calculates diesel oil distributive value and exports and give diesel oil rail model.Specifically can be adopted according to diesel injection pulsewidth and diesel oil rail pressure
MAP modes calculate diesel oil distributive value, fuel injector injection diesel oil amount q=MAP (injection pulse width t, rail pressure p).
Diesel oil high-pressure oil pump model is used to be calculated high-pressure oil pump pump oil amount and be exported using qualitative modeling to give diesel oil rail mould
Type.Fuel delivery in high-pressure oil pump each cycle of operation is a meansigma methods, rather than the pulse that instantaneous cam shaft line drives
Fuel delivery.Circular is：Fuel delivery q_Pump=Max_V*fac_Meun*eta；High-pressure oil pump maximum fuel delivery：
Max_V=(rotating speed/60) * oil cylinder volumes；Fuel gauging unit controlling elements fac_Meun：Electricity is driven by fuel gauging unit
Stream i_Meun looks into CUR calculating, fac_Meun=CUR (i_Meun).
Diesel oil rail model is for according to diesel oil distributive value and high-pressure oil pump pump oil amount, calculating diesel oil rail pressure is simultaneously exported to bavin
Oily fuel injector model and natural gas rail model.Diesel oil rail model specifically for：According to equation of continuity：Calculate diesel oil rail pressure P and export to diesel injector model and natural gas rail model；Wherein, Qin
Be the diesel oil flow into diesel oil rail, obtained according to high-pressure oil pump pump oil amount；QoutTo flow out the diesel oil flow of diesel oil rail,
Obtained according to diesel oil distributive value Conversion of measurement unit；Elastic modelling quantity of the E for diesel oil；Volumes of the V for diesel oil rail.
Natural gas rail model is for according to diesel oil rail pressure acquisition natural gas rail pressure；Natural gas rail pressure can be according to diesel oil rail pressure
Calculate, and diesel oil rail pressure keeps constant poor substantially.
Gas injector model is for according to the natural gas injection pulsewidth and natural gas rail pressure for collecting, calculating day
Right gas jet amount.It is similar with diesel injector model, gas injector model can also according to natural gas injection pulsewidth and
Natural gas rail pressure calculates natural gas injection amount using MAP modes.
Shown in Figure 7, in some embodiments of the invention, torque model can include：
Prompting moment of torsion obtaining unit 701, for natural gas injection amount to be converted to the equivalent diesel oil matter for producing same moment of torsion
Amount, obtains prompting moment of torsion according to equivalent diesel quality and diesel oil distributive value sum.
Friction torque obtaining unit 702, for searching friction torque arteries and veins spectrogram and obtaining according to engine water temperature, engine speed
Obtain friction torque.
Moment of torsion obtaining unit 703, for calculating prompting moment of torsion and friction torque sum as the output torque of electromotor.
In some embodiments of the invention, moment of torsion obtaining unit is pointed out to include：
First obtains subelement, for adopting the side being added with compensation dosage again that natural gas injection amount is multiplied with conversion coefficient
Formula obtains natural gas injection amount and is converted to the equivalent diesel quality for producing same moment of torsion；Wherein, conversion coefficient is according to electromotor
Rotating speed, gas pedal aperture are searched natural gas and turn the acquisition of diesel oil conversion coefficient arteries and veins spectrogram；Compensation dosage be according to engine speed,
Gas pedal aperture is searched natural gas and turns the acquisition of diesel oil compensation dosage arteries and veins spectrogram.
Second obtains subelement, for searching and carrying with diesel oil distributive value sum, engine speed according to equivalent diesel quality
Show that moment of torsion arteries and veins spectrogram obtains prompting moment of torsion.
In some embodiments of the invention, moment of torsion obtaining unit is pointed out to include：
Revise subelemen, obtains for searching prompting torque correction factor arteries and veins spectrogram according to engine speed, injection advance angle
Torque correction factor must be pointed out；The prompting moment of torsion that second acquisition subelement is obtained is multiplied as carrying with torque correction factor is pointed out
Show moment of torsion.
Shown in Figure 8, the operation principle of torque model is：By natural gas injection amount is converted into, generation is same to be turned round
The equivalent diesel quality of square, calculates basis based on total diesel quality (i.e. equivalent diesel quality and diesel oil distributive value sum) and indicates
Moment of torsion.Above-mentioned transformation process is carried out by the linear mode of y=kx+b, wherein y represent conversion after equivalent diesel quality,
It is conversion coefficient, b as compensation dosage that x represents natural gas injection amount, k.Converting system k is to turn diesel oil conversion coefficient by looking into natural gas
The mode of MAP tables is calculated, and natural gas turns diesel oil conversion coefficient MAP inputs respectively engine speed and gas pedal and opens
Degree.Compensation dosage b is calculated by way of looking into natural gas and turning diesel oil compensation dosage MAP table, and natural gas turns diesel oil compensation dosage MAP
Input be respectively engine speed and gas pedal aperture.Basic indication torque passes through engine speed, equivalent diesel quality
Prompting moment of torsion MAP is searched with diesel oil distributive value sum to obtain.Indication torque can also be repaiied by pointing out torque correction factor MAP
Just, torque correction factor MAP inputs are pointed out to be respectively engine speed and injection advance angle, the injection advance angle refers to main jet
Advance angle, main jet are probably natural gas or diesel oil, so main jet advance angle is natural gas injection advance angle or diesel oil spraying
Penetrate advance angle.Friction torque is searched friction torque MAP and is calculated by engine water temperature, engine speed, is negative value.Most
The effective torque of output is indication torque and friction torque sum eventually.In addition, torque model is can be used for according to gas spraying
The amount of penetrating and diesel oil distributive value are respectively calculated indication torque, and then summation obtains prompting moment of torsion.
In some embodiments of the invention, exhaust gas constituents model can specifically for calculate waste gas in air ratio with
And the fuel oil ratio in waste gas.The air inlet composition that can be input in passing through air inlet Component Model, it is unburned in air-fuel ratio, fuel oil
Ratio etc. completes to calculate.Detailed process is：Air ratio=f in waste gas (air-fuel ratio AFR, internal combustion oil of cylinder amount, air capacity in cylinder,
Gross mass after burning), wherein air-fuel ratio be parameter, air capacity=charge * inlet air ratio in cylinder, charge=
F (theoretical air inflow, charging efficiency), theoretical air inflow=f (inlet manifold density, engine displacement, compression ratio), charging efficiency
MAP tables are looked into according to rotating speed, inlet manifold to calculate, inlet air ratio=f (air throttle mass flow, EGR air ratios,
EGR quality flow).Total amount after non-amount of fuel/burning in waste gas intermediate fuel oil ratio=waste gas；Non- amount of fuel=total fuel oil in waste gas
Amount * MAP (rotating speed, injection advance angle).
In some embodiments of the invention, thermal balance model can be used for by Heat balance calculation water inflow of the engine temperature
Degree and leaving water temperature.Engine heat loss is gone out by computation of table lookup according to effective engine power, along with EGR heat loss,
Heat of machine oil transmission feedwater etc., deducts the heat in inflow radiator and enters air heat, obtain a heat flow, this
Heat flow is used for engine outlet water temperature is heated up.Electromotor enters coolant-temperature gage, is to deduct radiating according to the heat in radiator
Device enters the heat of air, and the heat flow for obtaining causes radiator outlet temperature to heat up, i.e. water inflow of the engine temperature.
The embodiment of the present invention constructs a kind of hardware-in-the-loop test of diesel oil ignited high pressure direct injection natural gas engine
System.Plant model is related to the lengthwise movement of car load, car load load environment, and key component is engine fuel supply and combustion
Burn model.The tolerance of natural gas is changed by the way of energy equivalence by the dual-fuel combustion torque emulation of diesel oil, natural gas
For the equivalent oil mass of diesel engine, total diesel oil oil mass is obtained for calculating indication torque.Amount of natural gas is converted to the employing of diesel oil amount
Transformation ratio adds the linear method i.e. y=kx+b of compensation dosage, transformation ratio k and compensation dosage b by engine speed and gas pedal
Aperture is looked into MAP tables and is obtained.
So, diesel oil provided in an embodiment of the present invention, the hardware-in-loop simulation of natural gas double fuel engine controller are surveyed
Test system, by building controller plant model, plant model includes environmental model, pilot model and car load
Dual fuel engine model in model, particularly whole vehicle model (includes gas circuit model, fuel supply model, cylinder combustion mould
Type, thermal balance model), the emulation to dual fuel engine can be completed, it is dynamic to the eruption of diesel oil ignited, natural gas straight so as to realize
The closed loop test of machine controller, dynamic test, can simulate different operating mode scenes：Start, mutation is loaded, engine pedestal examination
The static state dynamic operation condition such as circulation, car load driving cycle is tested, is marked with the control parameter for completing HPDI dual fuel engine controllers in advance
Fixed, functional test, durable test etc., with safety, economy, low cost and other advantages.In addition, the employing of cylinder combustion model will be natural
Mode of the gas shift into diesel oil, realizes simple effective and is conducive to being changed in existing Diesel Engine Model immediately above, save
Manpower, raising efficiency.
It should be noted that each embodiment is described by the way of progressive in this specification, each embodiment emphasis is said
Bright is all the difference with other embodiment, between each embodiment identical similar portion mutually referring to.For reality
For applying system disclosed in example or device, as which corresponds to the method disclosed in Example, so fairly simple, the phase of description
Part is closed referring to method part illustration.
Also, it should be noted that herein, such as first and second or the like relational terms are used merely to one
Entity or operation are made a distinction with another entity or operation, and are not necessarily required or implied between these entities or operation
There is any this actual relation or order.And, term " including ", "comprising" or its any other variant are intended to contain
Lid nonexcludability is included, so that a series of process, method, article or equipment including key elements not only will including those
Element, but also including other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element for being limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
The step of method described with reference to the embodiments described herein or algorithm, directly can be held with hardware, processor
Capable software module, or the combination of the two is implementing.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, depositor, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (11)
1. a kind of dual fuel engine controller simulation test system, it is characterised in that the system includes：
Real-time simulation machine and engine controller；
The real-time simulation machine is used for running environment model, pilot model and whole vehicle model, and the whole vehicle model includes double
Engine fuel model, accessory model, actuation system models, longitudinal direction of car dynamic model；The dual fuel engine model bag
Include gas circuit model, fuel supply model, cylinder combustion model, thermal balance model；The fuel supply model is used to calculate diesel oil
Rail pressure, natural gas rail pressure, diesel oil distributive value and natural gas injection amount；The cylinder combustion model includes torque model and gives up
Gas Component Model, the torque model are used for the output torque for calculating electromotor, and the exhaust gas constituents model is used to calculate waste gas
Composition；
The real-time simulation machine for the environmental model is exported vehicle environmental parameter, the pilot model output drive
Each vehicle operating parameters of the person's of sailing behavioral parameters and whole vehicle model output are sent to the engine controller；Receive
The control signal that the engine controller sends, according to the control signal continue to run with environmental model, pilot model with
And whole vehicle model；
The engine controller is for according to the vehicle environmental parameter, the driving behavior parameter and vehicle fortune
Line parameter determines engine operating condition and performs control logic generation control signal, the control signal is sent to described imitative in real time
Prototype.
2. system according to claim 1, it is characterised in that the fuel supply model includes：
Diesel injector model, diesel oil high-pressure oil pump model, diesel oil rail model, natural gas rail model and gas injector mould
Type；
The diesel injector model is for according to the diesel injection pulsewidth and diesel oil rail pressure for collecting, calculating diesel oil oil spout
Measure and export to the diesel oil rail model；
The diesel oil high-pressure oil pump model is used to calculate high-pressure oil pump pump oil amount using qualitative modeling and export to the diesel oil
Rail model；
The diesel oil rail model is for according to the diesel oil distributive value and the high-pressure oil pump pump oil amount, calculating diesel oil rail pressure is simultaneously
Export to the diesel injector model and the natural gas rail model；
The natural gas rail model is for according to diesel oil rail pressure acquisition natural gas rail pressure；
The gas injector model is for according to the natural gas injection pulsewidth and the natural gas rail pressure for collecting, meter
Calculate natural gas injection amount.
3. system according to claim 2, it is characterised in that the diesel oil rail model specifically for：
According to equation of continuity：Calculate diesel oil rail pressure P and export to the diesel injector model with
And the natural gas rail model；Wherein, QinBe the diesel oil flow into diesel oil rail, obtained according to the high-pressure oil pump pump oil amount
's；QoutTo flow out the diesel oil flow of diesel oil rail, obtained according to the diesel oil distributive value Conversion of measurement unit；Elasticity of the E for diesel oil
Modulus；Volumes of the V for diesel oil rail.
4. system according to claim 1, it is characterised in that the torque model includes：
Prompting moment of torsion obtaining unit, for the natural gas injection amount to be converted to the equivalent diesel quality for producing same moment of torsion,
Prompting moment of torsion is obtained according to the equivalent diesel quality and the diesel oil distributive value sum；
Friction torque obtaining unit, for searching friction torque arteries and veins spectrogram and being rubbed according to engine water temperature, engine speed
Moment of torsion；
Moment of torsion obtaining unit, for calculating prompting moment of torsion and the friction torque sum as the output torque of electromotor.
5. system according to claim 4, it is characterised in that the prompting moment of torsion obtaining unit includes：
First obtains subelement, for adopting the side being added with compensation dosage again that the natural gas injection amount is multiplied with conversion coefficient
Formula obtains the natural gas injection amount and is converted to the equivalent diesel quality for producing same moment of torsion；
Second obtains subelement, for being looked into the diesel oil distributive value sum, engine speed according to the equivalent diesel quality
Prompting moment of torsion arteries and veins spectrogram is looked for obtain prompting moment of torsion.
6. system according to claim 5, it is characterised in that the prompting moment of torsion obtaining unit also includes：
Revise subelemen, is carried for searching prompting torque correction factor arteries and veins spectrogram according to engine speed, injection advance angle
Show torque correction factor；The prompting moment of torsion and the prompting torque correction factor that described second acquisition subelement is obtained is multiplied work
To point out moment of torsion.
7. system according to claim 5, it is characterised in that the conversion coefficient is stepped on according to engine speed, throttle
Plate aperture is searched natural gas and turns the acquisition of diesel oil conversion coefficient arteries and veins spectrogram；The compensation dosage is stepped on according to engine speed, throttle
Plate aperture is searched natural gas and turns the acquisition of diesel oil compensation dosage arteries and veins spectrogram.
8. system according to claim 1, it is characterised in that the gas circuit model includes：
Supercharger model, throttle model, inlet manifold model, air inlet Component Model, exhaust manifold model and EGR valve mould
Type；
The pressure and temperature that the supercharger model is used for after calculating engine booster；
The throttle model determines throttle opening for the throttle orifice equation based on constant entropy adiabatic process；
The EGR valve model determines EGR valve aperture for the throttle orifice equation based on constant entropy adiabatic process；
The air inlet Component Model is used to calculate the air ratio in air inlet.
9. system according to claim 1, it is characterised in that the exhaust gas constituents model is specifically for calculating in waste gas
Fuel oil ratio in air ratio and waste gas.
10. system according to claim 1, it is characterised in that the thermal balance model is used for by Heat balance calculation
Water inflow of the engine temperature and leaving water temperature.
11. systems according to claim 1, it is characterised in that
The actuation system models include：Identification loop model, clutch model, speed change box model and main reducing gear differential mechanism
Model；
The longitudinal direction of car dynamic model includes：Car load load module and car load rate pattern；
The accessory model includes：Starter motor model, battery model and air-conditioning model.
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| CN104595043B (en) * | 2014-12-26 | 2017-04-19 | 长城汽车股份有限公司 | Fuel oil distributing method and system of dual-fuel engine and vehicle |
| CN105223023B (en) * | 2015-09-29 | 2017-07-28 | 安徽江淮汽车集团股份有限公司 | A kind of detection method of EGR gas temperatures and cooler for recycled exhaust gas cooling effectiveness |
| CN105573296B (en) * | 2016-01-15 | 2017-12-15 | 上海汽车变速器有限公司 | Vehicle diagnosis automatization test system and method based on hardware in loop |
| CN106250655B (en) * | 2016-08-18 | 2019-07-05 | 潍柴动力股份有限公司 | A kind of the emulation experiment method and simulating experimental system of oil mass balance |
| CN107503855A (en) * | 2017-08-17 | 2017-12-22 | 中国第汽车股份有限公司 | The fuel quantity distribution computational methods of Diesel-CNG dual fuel engine |
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| CN111462571A (en) * | 2019-01-19 | 2020-07-28 | 上海赫鲁丝网络科技有限公司 | Digital virtual vehicle engine system |
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| CN111765020B (en) * | 2020-07-08 | 2021-11-19 | 潍柴动力股份有限公司 | Gas rail pressure adjusting method and system |
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