Diesel Combustion Control With Closed-Loop Control Of The . - Energy

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Diesel Combustion with Closed-Loop ControlDiesel CombustionControl with Closed-LoopControl of the InjectionStrategyMarek Tatur, Dean Tomazic, FEV Inc.Matthias Lamping, Thomas Koerfer, FEV MotorentechnikThorsten Schnorbus, Jan Hinkelbein, Stefan Pischinger, RWTH Aachen1

Diesel Combustion with Closed-Loop ControlPresentation Contents Motivation System Specifications Layout of Closed-Loop Combustion Control Benefits of Closed-Loop Combustion Control Real Time Combustion Control Test Results Summary2

Diesel Combustion with Closed-Loop ControlPresentation Contents Motivation System Specifications Layout of Closed-Loop Combustion Control Benefits of Closed-Loop Combustion Control Real Time Combustion Control Test Results Summary3

Diesel Combustion with Closed-Loop ControlRate Shaping – Definition of Injection Characteristics1412NOx eBMEP [bar]PMInj-RateNO X -Emission [%]42TimeNOx68050010001500200025003000Engine Speed [rpm]4

Diesel Combustion with Closed-Loop ControlPresentation Contents Motivation System Specifications Layout of Closed-Loop Combustion Control Benefits of Closed-Loop Combustion Control Real Time Combustion Control Test Results Summary5

Diesel Combustion with Closed-Loop ControlDiesel Engine Control StrategiesDiesel Control Strategies TodayControlledVariableSet VariableVGT-PositionBoost PressureFuture Control StrategyControlledVariableSet VariableBoost Throttle ValveEGR-ValveAir MassECUThrottle ValveCombustionCenterRail PumpStabilityRail PressureNoiseECURail PressureNumber ofPilot injectionsBegin of maininjection6

Diesel Combustion with Closed-Loop ControlDiesel Engine Control risticsBOIIn-CylinderConditionsControl of alysis ofCombustionProcessCombustion ProcessEmissions,NVH, FuelConsumption7

Diesel Combustion with Closed-Loop ControlDiesel Engine Control StrategiesExpectations for Closed-Loop Combustion ControlFuelcompensation ①Improvedcalibration ofcorrections ①Control ofcombustionduringregeneration ①Support ofimprovedhomogenization①Fast, adaptiveapplication ①Improvedrobustness ①Compensation ofvariances and driftOnlineassessmentof combustionnoise ①①① Patent pending② FEV PatentRate-ShapingRealtime ② / Cycle to Cycle ①transient loadcontrol ①short termmid thermlong term8

Diesel Combustion with Closed-Loop ControlPresentation Contents Motivation System Specifications Layout of Closed-Loop Combustion Control Benefits of Closed-Loop Combustion Control Real Time Combustion Control Test Results Summary9

Diesel Combustion with Closed-Loop ControlParticulate Matter BenefitsSmoke numberSmoke Number with Pilot InjectionKF Mapping Single Pilot VSR303 .00.61.90.30.107501.610000.60.112500.20.10.3Smoke er without Pilot InjectionKF Mapping without Pilot ine speed [1/min]2500275030001.01.41.41.2143250 12PME [bar]PME 10.10.10.10.10.12500275030003250Engine speed [1/min]Without Pilot a significant reduction of soot – noise is an issue!10

Diesel Combustion with Closed-Loop ControlPilot Strategy AdjustmentControl of Combustion NoiseThrough Number of Pilot InjectionsInjection rdegree ��)“)Increased Level ofCombustion NoiseMain InjectionHaupteinspritzung 1 VoreinspritzungPilot “)Increased Level ofCombustion ktorDemandAnsteuerungHaupteinspritzungOnlymain InjectionOT ctorInjektorDemandAnsteuerungTDC CAOT KWLevel of CombustionNoise allowedMainInjectionHaupteinspritzung 2 VoreinspritzungPilot Injections(Change of Injection(CharakteristikwechselCharacteristicsfor only ffür1 cycleeinen ng KWGeräuschprüfungGerNoiseCheck(Change of Injection(CharakteristikwechselCharacteristics for only ffür1 cycleLevel of Combustion einen Verbrennungszyklus)Noise allowedInjectorInjektorDemandAnsteuerungTDC CAOT KWTDC KW CAOT11

Diesel Combustion with Closed-Loop ControlPilot Strategy AdjustmentControl of Combustion NoiseThrough Number of Pilot ristikControlledCharacteristicMit einerVoreinspritzungAlwaysOnePilot e]PartikelmasseParticle Mass[mg][mg]16510 15 20 25 30 35 40 45 50 55 60 65Zeit [s]Time[s]12

Diesel Combustion with Closed-Loop ControlEmission Potential of Advanced Fuel CompositionsPart Load Operation Point: 2300 rpm, high load (HECS)0.80.7Euro 6ISNOx-level0.6 g/kWhSmoke Number[FSN]0.60.50.4Fuel 1: Standard EN590 DieselResearch FuelsFuel 2: Diesel with reduced aromatic contentFuel 3: Diesel with reduced cetane numberFuel 4: Diesel with higher volatilityFuel 5: Diesel with reduced aromatic contentand higher volatilityFuel 6: Octane/Heptane blend (CN44)Fuel 7: Toluene/Heptane blend (CN44)Fuel 8: Gasoline/Diesel blend (CN44)Fuel 9: Octane/Heptane blend (CN35)Fuel 10: Octane/Heptane blend (CN30)Fuel 11: Octane/Heptane blend (CN25)Fuel 12: Octane/Heptane blend E10 (CN44)0.30.20.1Euro 5Euro 4ISNOx-level ISNOx-level1.2 g/kWh 1.8 u4elFu3elFu2elFu1elFu13

Diesel Combustion with Closed-Loop ControlPerformance Effect of Closed-Loop Combustion ControlEN590 Diesel0.05 Fuel 10.04 Fuel 20.030.020.010.001302520151054846444240381500 rpm, 4.3 bar IMEP, ISNOx const.ISPM [g/kWh]200Center of Combustion [ CA ABDC]1951901851802ISCO [g/kWh]8ISHC [g/kWh]642Indicated Efficiency [%]090EngineNoise Chigh engine efficiencyª MaintainCompensate HC & CO drawbacks and noise impact14

Diesel Combustion with Closed-Loop ControlPresentation Contents Motivation System Specifications Layout of Closed-Loop Combustion Control Benefits of Closed-Loop Combustion Control Real Time Combustion Control Test Results Summary15

Diesel Combustion with Closed-Loop ControlRTC² (Real-Time Combustion Control)2400 rpm / 14.6 bar IMEP120100806040200Monitoring ofcylinder pressureRealization of optimizedshape of injectionDetection ofbegin of combustionCalculation ofend of injection15001000Text500Pressurerise [bar/ CA]5.00Injectionpressure [bar]Cylinder pressure [bar]Real Time Control of Injection Rate Within one CycleTime for computationand injector delay2.50.0-2.5-5.0120130140150160170 180 190 200Crank angle [ CA]21022023024016

Diesel Combustion with Closed-Loop ControlPresentation Contents Motivation System Specifications Layout of Closed-Loop Combustion Control Benefits of Closed-Loop Combustion Control Real Time Combustion Control Test Results Summary17

Diesel Combustion with Closed-Loop ControlRate-ShapingControlled Cylinder Pressure Shape CNL OptimizedInjector Signal essure[bar]Constant Pressure Rise (1 CA/degree) with Peak Pressure Limitation11010090807060504030201001202000 rpmCurrent ValueIstwertSollwertSetpoint11.45 bar IMEPNo EGR100770 bar pRail806040200160170180190Kurbelwinkel[ KW]Degree Crankangle20021022018

Diesel Combustion with Closed-Loop ControlRate-ShapingLoad Variation with Constant Pressure CycleAdjustments only necessary to the last part of the injection trace100ZylinderdruckCylinderPressure [bar][bar]9080706050IMEP15.9 bar pmiIMEP13.1 bar pmiIMEP10.4 bar pmiIMEP07.6 bar pmiIMEP04.6 bar pmiIMEP01.9 bar pmi403020102280 rpmInjector Signal [V]Injektorspannung[V]0120No EGR100800 bar pRail80601.95 bar pBoost40200160170180190200Kurbelwinkel[ KW]DegreeCrankangle21022019

Diesel Combustion with Closed-Loop ControlCORS Combustion Rate 0220Crank angle [ CA]3.51203.01002.5802.0601.5401.0200.5190200Crank angle [ 02202100.0220(slope 4 bar/ CA; PPL 20 bar)Injection rate [mg/ CA]Cylinder pressure [bar]1401803.0α-process with peak pressurelimitation(slope 4 bar/ CA)170120Crank angle [ 1.0200.50160170180190200Crank angle [ CA]2100.022020Injection rate [mg/ CA]170Cylinder pressure [bar]0160140Injection rate [mg/ CA]120Cylinder pressure [bar]Seiliger process3.5Injection rate [mg/ CA]Cylinder pressure [bar]Isobaric process140

Diesel Combustion with Closed-Loop ControlSummary New control strategies are enabler for new combustionconcepts for further reduction of engine out emission Engine operation with high degrees of homogenizationis highly sensitive to transient driving profiles Adaptive injection characteristic is able to solve mostchallenges which occur in transient conditions The system is able to avoid torque drops andcombustion noise peaks by adapting the number of pilotinjections21

Diesel Combustion with Closed-Loop Control Diesel Combustion Control with Closed-Loop Control of the Injection Strategy Marek Tatur, Dean Tomazic, FEV Inc. Matthias Lamping, Thomas Koerfer, FEV Motorentechnik Thorsten Schnorbus, Jan Hinkelbein, Stefan Pischinger, RWTH Aachen

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