Roadmap to Energy Conversion Efficiency at Cummins · PDF fileRoadmap to Energy Conversion...
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Roadmap to Energy Conversion Efficiency at Cummins
2013 ERC SymposiumJune 5, 2013
Wayne Eckerle-VP Corporate Research & Technology
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� Technology Integration Process
� Key Technologies for Diesel Engines
� GHG Reduction Potential for On-Highway Applications
� Key Technologies for Natural Gas Engines
� Summary
Topics
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Low Initial Cost
Low Maintenance
Electronic
Integration
Low
Emissions
Reliable and Durable
High Performance
Fuel Efficient
Our Products Must Meet Customer Requirements
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Improve
Alt Fuels
Understanding
Mechanical
Components
Analysis
Led
Design
Achieving Very Low
Engine Out
Diesel
Emissions
Catalyst
Technology
Development
System
Integration
Controls
R&T Product Preceding Technology Research Areas
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Keys to Successful Analysis-Led Design
� Cultural Change
� Effective Tools
� Documented Processes
� Skilled Analysts
� Continuous Improvement
� Analysis Must Deliver
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10-Year Combustion Research ALD Funnel
Active Projects(Exploratory) Active Projects
(Near Term) Baseline
Technology
2011 - 2012 < 20112012 - 2016
> 2016
Hopper
KIVA (Old CFD Tool)• RIF Diesel and G-Equation
NG Combustion Model
• Full NOX
• Soot Moment Model
• KH-RT Spray Model
• Single CPU
Block Structured Grid• Hand-built/semi-automated
mesh generation
Calibration/Optimization• DOEs
• Pre-defined bowl geometries
In-Cylinder Charge
Motion• Bessel Function (standard)
• Fluent imposed flow field
(for 360o grids as needed)
Modeling Enhancements• Fully-Coupled LES with
Sprays and Chemistry
• Improved Combustion &
Emissions Models
• Injector Internal Flow/Spray
Routine Coupling
• Flow/Structure Heat Transfer
Routine Coupling
• Massively Parallel Computing
New CFD Tool• Detailed, Flamelet, and Flame-Area Chemistries
• Improved Emissions Modeling
• Spark Ignition Engine Modeling, including Knock
• Improved Spray Modeling, including Liquid Films
• Improved RANS Turbulence Modeling
• Integrated Port Flow Modeling
• Full Parallelization
• Improved Pre-/Post-Processing Tools
• Improved Support and Documentation
New Chemistry Tool• Detailed Mechanism Calculations
• Reduced Kinetics Mechanism Generation
• Flamelet Model Support/Library Generation
• One-dimensional Engine Model, including Knock
New Optimization Tool• Fully integrated Mesher, Solver, and Optimizer
• Automated Grid Generation/Mesh Refinement
• Detailed Chemistry Solver (RIF to be added)
• Genetic Algorithms Optimization
Advanced Simulation• Turbulence and Spray DNS
• Full Chemistry
• Advanced Numerical
Methods
• Advanced Computing
Technology
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Technology
Development
(Sub-system Level)
Platform
Integration/
Product
Development
(System Level)
Technology
Integration
(System Level)
Invent /
Innovate Develop Optimize Certify
Value Package
Introduction
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Technology Workflow
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2020 HD Technical
Prioritized List
Adv. Combustion
Friction/Parasitic
Hybrid
Waste Heat Rec.
Low T. Aftertreatment
Increased PCP
2020 HD Technical
Prioritized List
Adv. Combustion
Friction/Parasitic
Hybrid
Waste Heat Rec.
Low T. Aftertreatment
Increased PCP
Implement
as Required
in VPI
Arrange Technologies
in Customer
Benefit Order
Illustrative Example
Payback
Regulation
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Integration Approach
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Vehicle Energy LossesSuperTruck Baseline
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Analysis of 27 Drive Cycles for Class 8 Vehicles
with a Variety of Seasons (Summer, Winter, etc.)
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SuperTruck Program
50% Drive Cycle
Freight Efficiency
Demonstration
68% 24hr Cycle
Freight Efficiency
Demonstration
50% BTE
Demonstration
55% BTE
Demonstration
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SuperTruck Program
Dec 2012
50% Drive Cycle
Freight Efficiency
Demonstration
Dec 2013
68% 24hr Cycle
Freight Efficiency
Demonstration
Dec 2012
50% BTE
Demonstration
Apr 2014
55% BTE
Demonstration
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Contribution of Future Engine Technology
6.3 MPG 10 MPG
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TM
Engine50%
Truck50%
Contribution to Improvement
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Subsystem Technology Palette
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Air Handling & EGR
Aftertreatment (AT)
Electronic Controls
EnergyRecovery
TransmissionIntegration
Combustion &Fuel Systems
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TM
Sources of Heat on Current EngineF
uel E
nerg
y (
100%
)
Brake Power
(42%)
Friction/Misc Losses
(8%)
Heat Transfer
(24%)
Exhaust Energy(26%)
Hig
hW
aste
Heat
Qu
ali
tyH
igh
Cooled EGR
Tailpipe Exhaust
200-600o C 200-600o C
200-750o C 200-750o C
Charge Air Cooling
Engine Cooling
20-60o C20-60o C
80-100o C80-100o C
Lo
wW
aste
Heat
Qu
ali
tyL
ow
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TM
Current WHR Architecture
� Low GWP Refrigerant
� Turbine Expander
� Heat exchangers
–EGR Heat Exchanger
(replaces EGR cooler)
–Exhaust Heat Exchanger
–Recuperator
� Mechanical power to crank
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Waste Heat Recovery Trucks on Road
WHR Exhaust
Heat Exchanger Exhaust
AftertreatmentWHR Expander
Drive Module
WHR
Recuperator
WHR
EGR Heat Exchanger
WHR
Condensor
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Technologies for 50% Engine Thermal Efficiency
Combustion & Air Handling� Piston bowl size and shape
� Injector specification
� Calibration optimization
� Turbocharger efficiency
� Aftertreatment optimization
Parasitic reductions� Shaft seal
� Variable flow lube pump and viscosity
� Geartrain
� Cylinder kit friction
� Cooling and fuel pump power
WHR system� EGR, exhaust, recuperator
� Turbine expander
� Low GWP refrigerant
SuperTruck Efficiency Improvement Results
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Inn
ovati
on
Yo
u C
an
Dep
en
d O
n™
Fuel Energy
100%
Indicated Power58%
Heat Transfer
17%
Exhaust
18.5%
Gas Exchange
2%
Friction
1.0%
Accessories
1.0%
Brake Power
60.5%
EGR Source
(ORC)
5%
EGR + Exhaust
Source1.5%
Energy Balance for Advanced HD Engine
with Electrification of the Vehicle
Electrified Vehicle
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Hybrid Technology
Accessory Loads
Power to Driveline
Motor Battery
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Hybrid Spectrum
Basic
Start stop
Start stop with braking energy capture
Integrated power source (super alternator)
Integrated starter generator
Parallel full hybrid
Increased functionality
Hig
her
init
ial co
st
Affordable Today
Research efforts in
place to pull these down.
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� Technical feasibility has been demonstrated
� Performance competitive
� Customer interest growing
BUT
� Market penetration continues to be hampered by persistent high costs
� Aggressive cost reduction at ALL levels essential for commercial viability and mass market acceptance
Hybrids and EVs in the 2012 Marketplace
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� Energy Storage Systems
� Power Electronics (Inverter, Converter, Charger)
� Electric Machines
� System Integration
Key HEV Technologies Driving Vehicle Performance and Cost
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DoE Traction Drive Technical & Cost Targets
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ATLAS Program Technologies for High Efficiency Pickup Truck Application
Light Weighting
On-Engine/
Close coupled
aftertreatment
Low Pressure
EGR
Direct NH3 Gas
Delivery
Low Thermal
Mass Exhaust
Manifold
Cold Start Catalyst
By JMI
Down Sizing
Reduced
Displacement
Base ATLAS
City MPG 15.6 23.5
Highway MPG 24.5 34.3
SCRF
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Natural Gas Technology
Aftertreatment
Air Handling
Friction and Parasitics
Waste Heat Recovery
Natural gas produces 5-10% less
mass of exhaust CO2/hp
(less CO2/energy but worse BTE)CH4 GWP = 25 x CO2 GWP
Diesel Engine
Technologies
Most
Technologies
Transfer
Ignition Systems
Nat Gas Aftertreatment
Nat Gas Combustion
Air Handling
Friction and Parasitics
Waste Heat Recovery
Combustion
Natural Gas
Technologies
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Advanced Lean
Burn
Stoichiometric
Higher Detonation Limit
for “EGR diluted” mixture
λλλλ = (Airin + Diluant*)/Airstoich Ratio
* CO2 + H2O
Simple
Lean Burn
Spark Ignition ArchitecturesALB w/SCR
Stoichiometric
Cooled EGR
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Ghourshal, Bangladesh – 146 QSK60 Gas Aggreko gensets
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Summary
� Engine and powertrain technology can provide significant GHG benefits going forward
� Technologies are applicable to a wide range of energy sources
� Simulation capability is a significant enabler
� System Integration is the discriminator
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Acknowledgements
� DOE
� Partners on the DOE programs
– Peterbilt, Eaton, Nissan
� Researchers in Cummins R&T group
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