Diesel Efficiency and Associated Fuel Effects Stuart Johnson
Transcript of Diesel Efficiency and Associated Fuel Effects Stuart Johnson
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Diesel Efficiency and Associated Fuel EffectsDiesel Efficiency and Associated Fuel Effects
Stuart JohnsonSenior Manager, Engineering and Environmental Office, Volkswagen Group of America
CRC Workshop – Advanced Fuel & Engine Efficiency Workshop
Session Three – Compression Ignition, February 25, 2014
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AGENDAI t d tiI t d tiIntroductionIntroduction
Regulatory challengesRegulatory challenges
VW Group overviewVW Group overviewImportance of diesel engine technologyImportance of diesel engine technology
Volkswagen diesel engine history in the USVolkswagen diesel engine history in the USFirst generation BIN 5/Clean Diesel engine in the JettaFirst generation BIN 5/Clean Diesel engine in the JettaSecond generation BIN5/Clean Diesel engine in the new US PassatSecond generation BIN5/Clean Diesel engine in the new US Passat
Regulatory challengesRegulatory challenges
Second generation BIN5/Clean Diesel engine in the new US PassatSecond generation BIN5/Clean Diesel engine in the new US PassatThird generation Clean Diesel: MDB modular EA 288 TDI®Third generation Clean Diesel: MDB modular EA 288 TDI®
Cetane influence on modern closed loop enginesCetane influence on modern closed loop enginesFuel effects on modern diesel enginesFuel effects on modern diesel engines
Cetane influence on modern closed loop enginesCetane influence on modern closed loop enginesOther fuel properties – energy density, volatility, fuel densityOther fuel properties – energy density, volatility, fuel density
Summary of fuel effectsSummary of fuel effectsBiodiesel influenceBiodiesel influence
Summary of fuel effectsSummary of fuel effects
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VW GROUP PRODUCTS: NINE INDEPENDENT BRANDS
Automotive DivisionAutomotive DivisionAutomotive DivisionAutomotive DivisionPassenger CarsPassenger Cars
Also: VW Commercial Scania MANAlso: VW Commercial Scania MANAlso: VW Commercial, Scania, MANAlso: VW Commercial, Scania, MAN
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Volks agen Gro p Clean Diesel Sales Vol meDiesel ol me Passenger Cars (PC) 2012
DIESEL IS AN IMPORTANT DIFFERENTIATOR FOR THE VOLKSWAGEN GROUP
Volkswagen Group Clean Diesel Sales Volume Diesel volume Passenger Cars (PC) 2012
77.192
99.094
26.675 77,192
99,094
43.869
59.342PorscheVolkswagen
99 094
26.675~ 21%~22%
43 869
59,342
12.325
43.869Audi99.094
~ 79 %~78%
12,325
43,869
h d
2008 2009 2010 2011 2012Volkswagen Group Competitors
Constant growth since its introductionVolkswagen Group US market share diesel PC ~ 78 %
Source for competitor sales: Polk
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VW PASSAT TDI SETS NEW WORLD RECORD FOR FUEL ECONOMY
Volkswagen of America announced today that it has set a new GUINNESS WORLD RECORDS®
achievement for the “lowest fuelachievement for the lowest fuel consumption—48 U.S. states for a non-hybrid car” category. • 77.99 mpg more than 10 mpg
better than the previous mark ofbetter than the previous mark of 67.9 mpg
• The achievement also beats the hybrid vehicle record of 64.6
“We felt we had a good chance of beating the existing record with the Passat TDI,” Gerdes said, “but to smash it by averaging 77 99 mpg is really impressive and a testament to the potential
mpg by more than 13 mpg• 8,122 miles on just 104.94
gallons of fuel 77.99 mpg is really impressive and a testament to the potential of Volkswagen’s TDI Clean Diesel vehicles.
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2013 2014 2016 2018 2020 2022 20242015 2017 2019 2021 2023 2025
REGULATORY PROGRAM TIMING2013 2014 2016 2018 2020 2022 20242015 2017 2019 2021 2023 2025
Tier-3Tier-3Tier-2Tier-2Federal Tailpipe
LEV-IILEV-IICalifornia TailpipeLEV-IIILEV-III
p p
Euro-6.1Euro-6.1Euro-5Euro-5European Tailpipe
Euro-6.2Euro-6.2
GHG-2GHG-2GHG-1GHG-1Federal EPA GHG
CAFE 2017-2021CAFE 2017-2021CAFE 2012-2016CAFE 2012-2016Federal USDOT CAFE
CAFE 2017-2021CAFE 2017-2021
Euro 130Euro 130European GHGEuro 95Euro 95
ZEV-IZEV-ICalifornia ZEVZEV-IIZEV-II
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WORLDWIDE EMISSION PROGRAMSVolkswagen Group targeting 10 million units per year Worldwide in 2018
NAR ≈ 1,000,000 units
SAR ≈ 1,000,000 units
US Based Emissions Stds
ECE Based Emissions Stds
20% of Worldwide Volkswagen sales comply with US Standards for emissions, the remaining 80% comply with ECE
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AGENDAI t d tiI t d tiIntroductionIntroduction
Regulatory challengesRegulatory challenges
VW Group overviewVW Group overviewImportance of diesel engine technologyImportance of diesel engine technology
Volkswagen diesel engine history in the USVolkswagen diesel engine history in the USFirst generation BIN 5/Clean Diesel engine in the JettaFirst generation BIN 5/Clean Diesel engine in the JettaSecond generation BIN5/Clean Diesel engine in the new US PassatSecond generation BIN5/Clean Diesel engine in the new US Passat
Regulatory challengesRegulatory challenges
Second generation BIN5/Clean Diesel engine in the new US PassatSecond generation BIN5/Clean Diesel engine in the new US PassatThird generation Clean Diesel: MDB modular EA 288 TDI®Third generation Clean Diesel: MDB modular EA 288 TDI®
Cetane influence on modern closed loop enginesCetane influence on modern closed loop enginesFuel effects on modern diesel enginesFuel effects on modern diesel engines
Cetane influence on modern closed loop enginesCetane influence on modern closed loop enginesOther fuel properties – energy density, volatility, fuel densityOther fuel properties – energy density, volatility, fuel density
Summary of fuel effectsSummary of fuel effectsBiodiesel influenceBiodiesel influence
Summary of fuel effectsSummary of fuel effects
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VOLKSWAGEN’S DIESEL HISTORY
1976 1983 1993 2000 2006 200819761.5l-2V-SD 50 HP
19831.7l-2V-SD 54 HP
19931.9l TDI 90 HP TIER1
20001.9l-2V-TDI –PD 100 HP BIN10
20065.0l 2V-TDI-PD DPF 310 HP BIN10
20082.0l-4V-TDI-Common Rail 140 HP BIN5
Audi A3 TDI Clean Diesel„Green Car of the Year 2010“
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THE FIRST GENERATION BIN5 ENGINE FOR THE JETTA CLEAN DIESEL
• Improved injector design withoptimized nozzle - multiple injections
Optimized and newly developed components of the BIN5 engine
optimized nozzle multiple injections
• Cylinder pressure control – closedloop cylinder control
• High and low pressure exhaust gasHigh and low pressure exhaust gas recirculation (EGR) with high-performance EGR cooler
• Turbocharger system with low pressureEGR inlet nozzle
• Intake pipe with controlable swirl valves
• Exhaust gas aftertreatment withExhaust gas aftertreatment withNOx storage catalyst
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THE SECOND GENERATION BIN5 ENGINE FOR THE NEW US PASSAT
20112.0l-4V-TDI-CR 140 HP BIN5
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THE SECOND GENERATION BIN5 ENGINE FOR THE NEW US PASSAT
• Cylinder head with integrated HP-EGR channel and optimised port geometrychannel and optimised port geometry
• Thermodynamical improved turbocharger design
• Optimized dual-circuit exhaust gas recirculation
• Indirect water cooled charge air
• Exhaust gas aftertreatment with SCR
• Indirect water cooled charge aircooling
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THE SECOND GENERATION BIN5 ENGINE FOR THE NEW US PASSATThe dual-circuit exhaust gas recirculation system
Air filterMAF
LP-EGRCR systemwith Injectors
watercooledcharge air cooler
Butterfly valve
EGR cooler
EGR filter
EGR valve
Turbo-charger
EGR valve
HP-EGR
valve
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THE NEW MODULAR TDI® GENERATION FROM VOLKSWAGEN – MDB EA 288
20132012
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TARGETS FOR TIER 3/EURO 6 ENGINES IN THE MDB
• Using the modular diesel system
• CO2 neutral reduction of NOx raw emission
• Scalable NOx aftertreatment
• Considering Euro 6 level 2 (RDE)
Hi h b t Ti 3 d E 6 i• High synergy between Tier 3 and Euro 6 engines
• Continuing module solutions for engine control
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THE MODULES OF THE BIN5 ENGINE IN THE MDBModules basic engine Modules exhaust gas aftertreatment
• HP EGR w/o cooler • Close‐coupled NOx aftertreatment(channel through cylinder head)
• Variable valve train (VVT)• Cylinder pressure control 2nd generation
p x
• 2000 bar high‐pressure injection system
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DUAL-CIRCUIT EXHAUST GAS RECIRCULATION -COMPONENTSIntake manifold with integrated intercooler
Air control valve
HP EGR valve
HP EGR channelLP EGR
LP EGR cooler
LP EGR
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VVT CONCEPT – PORTS AND VALVES IN ROTATED POSITION
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VVT OPERATING MODE - VALVE TIMING
Variable camshaft Fixed camshaft
Adjustment range max. 50° crank angle
Variable camshaft Fixed camshaft
lift
Valv
e
BDC TDC BDC
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HIGH-PRESSURE INJECTION SYSTEM - INJECTOR• Max. injection
pressure 2000 bar
• Mini rail• 3-part welded nozzle
needle with close-to-seat guide
• Nano blind hole
Nano blind hole
Mini rail
3 t ld d l dl
Close-to-seat guide
3-part welded nozzle needle
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MODULES OF THE TIER 3/EURO 6 ENGINE IN THE MDBM d l b i i M d l h t ft t t tModules basic engine Modules exhaust gas aftertreatment
NOx
S l bl i i ft t t t
raw emissions
- 40%Scaleable emissions aftertreatment
for various levels up to EU 6.2 and
LEV III/ Tier 3LEV III/ Tier 3
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CLOSE COUPLED EXHAUST GAS AFTERTREATMENTBIN5/Euro 6 exhaust system design with Selective Catalytic Reduction (SCR)
Temperature sensor T4
NOx sensorLambda sensor Temperature sensor T5
SCR dosing module(water-cooled)
y g y ( )
Temperature sensor T4
Temperature sensor T6
Oxidation catalystDifferential pressure sensor LP-EGR
Oxidation catalyst
Mixer
Diesel particulate filter with SCR coatingDiesel particulate filter
Cu/Zeolite
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Characteristics of the integrated componentDIESEL PARTICULATE FILTER WITH SCR COATING
Filter substrate
Cu/Zeolite coatingg p
• DPF with optimisedporosityHi h SCR h t
HH22OOCOCO22
NN
• High SCR washcoatamounts
• Thermally stable SCR coating
sootNOx
H OCO
NN22OO22
coating• Low exhaust back
pressure and high filtration efficiencyH2OCO2
N2NH3O2
filtration efficiency
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DIESEL PARTICULATE FILTER WITH SCR COATINGDevelopment of mixture preparation
Mixture preparation in transfer
p p p
• Mixture preparation in transfertunnel
• Low exhaust back pressurewith uniform NH distributionwith uniform NH3 distribution
• Avoiding urea deposits
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AGENDAI t d tiI t d tiIntroductionIntroduction
Regulatory challengesRegulatory challenges
VW Group overviewVW Group overviewImportance of diesel engine technologyImportance of diesel engine technology
Volkswagen diesel engine history in the USVolkswagen diesel engine history in the USFirst generation BIN 5/Clean Diesel engine in the JettaFirst generation BIN 5/Clean Diesel engine in the JettaSecond generation BIN5/Clean Diesel engine in the new US PassatSecond generation BIN5/Clean Diesel engine in the new US Passat
Regulatory challengesRegulatory challenges
Second generation BIN5/Clean Diesel engine in the new US PassatSecond generation BIN5/Clean Diesel engine in the new US PassatThird generation Clean Diesel: MDB modular EA 288 TDI®Third generation Clean Diesel: MDB modular EA 288 TDI®
Cetane influence on modern closed loop enginesCetane influence on modern closed loop enginesFuel effects on modern diesel enginesFuel effects on modern diesel engines
Cetane influence on modern closed loop enginesCetane influence on modern closed loop enginesOther fuel properties – energy density, volatility, fuel densityOther fuel properties – energy density, volatility, fuel density
Summary of fuel effectsSummary of fuel effectsBiodiesel influenceBiodiesel influence
Summary of fuel effectsSummary of fuel effects
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FUEL EFFECTS
It’s not easy…
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INFLUENCE OF FUELS ON EMISSIONS – TEST MATRIX
5 test fuels covering wide range of cetane number
ULSD CN 47ULSD CN 47ULSD CN 42ULSD CN 54B30 CN 54SynFuel CN 77
2.0L mass production engine2.0L mass production engine3 engine load points
low load (LL)medium load (ML)high load (HL)high load (HL)
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FUEL INFLUENCE ON EMISSIONS – NOx / SOOT
Engine emission sensitivity dependent on fuel and load point Inhomogeneous fuel related differencesg Effect on exhaust aftertreatment system (DPF + SCR)
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FUEL INFLUENCE ON EMISSIONS – HC / CO
Engine emission sensitivity dependent on fuel and load point Inhomogeneous fuel related differencesg Risks of insufficient conversion at oxidation catalysts
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DIFFERENTIAL HEAT FLOW AT 2000 RPM
14
12SWC1 Closed Loop
SWC1 Open Loop 2000 rpm 2 bar SWC1 and USLC12
10
8
SWC1 Open Loop
USLC Closed Loop
USLC Open Loop
Q deg]
2000 rpm, 2 bar SWC1 and USLC, with smoothed oscillation
6
4
2
dQ[%
/d
2
0
-2-20 -10 0 10 20 30 40
Volkswagen Group of America EEO- Confidential -
20 10 0 10 20 30 40
Crank Angle [deg]
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E d it
FUEL EFFECTS OF OTHER FUEL PROPERTIES• Energy density
– Less impact on emissions but a greater impact on efficiency– Energy density also important when considering heat delivered to the after treatment systems
• Volatility• Volatility – Important aspect for post injection, crankcase dilution, and heat delivered to the after treatment
system– Also some new evidence indicates volatility may be more important than originally thought for y y p g y g
the combustion process• Fuel density
– Also important when modelling the amount of fuel delivered for both combustion and after treatment
• Biodiesel – Properties dependent on feedstock– Differences in volatility, cetane, energy density– Heat flow curves are different
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AGENDAI t d tiI t d tiIntroductionIntroduction
Regulatory challengesRegulatory challenges
VW Group overviewVW Group overviewImportance of diesel engine technologyImportance of diesel engine technology
Volkswagen diesel engine history in the USVolkswagen diesel engine history in the USFirst generation BIN 5/Clean Diesel engine in the JettaFirst generation BIN 5/Clean Diesel engine in the JettaSecond generation BIN5/Clean Diesel engine in the new US PassatSecond generation BIN5/Clean Diesel engine in the new US Passat
Regulatory challengesRegulatory challenges
Second generation BIN5/Clean Diesel engine in the new US PassatSecond generation BIN5/Clean Diesel engine in the new US PassatThird generation Clean Diesel: MDB modular EA 288 TDI®Third generation Clean Diesel: MDB modular EA 288 TDI®
Cetane influence on modern closed loop enginesCetane influence on modern closed loop enginesFuel effects on modern diesel enginesFuel effects on modern diesel engines
Cetane influence on modern closed loop enginesCetane influence on modern closed loop enginesOther fuel properties – energy density, volatility, fuel densityOther fuel properties – energy density, volatility, fuel density
Summary of fuel effectsSummary of fuel effectsBiodiesel influenceBiodiesel influence
Summary of fuel effectsSummary of fuel effects
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Closed loop c linder control can compensate for some differences in f elSummary of Fuel Effects• Closed loop cylinder control can compensate for some differences in fuel
properties • Despite this cetane and energy density still influence efficiency and
emissionsemissions• Volatility also seems to be more important than originally thought and is
being further investigatedBiodiesel properties especiall FAME is feedstock dependent and adds• Biodiesel properties, especially FAME, is feedstock dependent and adds additional variations to cetane, energy density and volatility
• Fuel influence is a complex picture - additional study is on-going
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DISCLAIMERThis presentation contains forward-looking statements and information on the business development of the Volkswagen Group. These
statements may be spoken or written and can be recognized by terms such as “expects”, “anticipates”, “intends”, “plans”, “believes”,
“seeks”, “estimates”, “will” or words with similar meaning. These statements are based on assumptions relating to the development of the
i f i di id l t i d i ti l f th t ti i d t hi h h d th b i f th i f tieconomies of individual countries, and in particular of the automotive industry, which we have made on the basis of the information
available to us and which we consider to be realistic at the time of going to press. The estimates given involve a degree of risk, and the
actual developments may differ from those forecast.
Consequently, any unexpected fall in demand or economic stagnation in our key sales markets, such as in Western Europe (and q y y p g y p (
especially Germany) or in the USA, Brazil or China, will have a corresponding impact on the development of our business. The same
applies in the event of a significant shift in current exchange rates relative to the US dollar, sterling, yen, Brazilian real, Chinese rinminbi
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superceededsuperceeded.
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