Simulated Real-World Energy Impacts of a Thermally Sensitive Powertrain Considering Viscous Losses and Enrichment (Presentation)
It is widely understood that cold-temperature engine operation negatively impacts vehicle fuel use due to a combination of increased friction (high-viscosity engine oil) and temporary enrichment (accelerated catalyst heating). However, relatively little effort has been dedicated to thoroughly quantifying these impacts across a large number of driving cycles and ambient conditions. This work leverages high-quality dynamometer data collected at various ambient conditions to develop a modeling framework for quantifying engine cold-start fuel penalties over a wide array of real-world usage profiles. Additionally, mitigation strategies including energy retention and exhaust heat recovery are explored with benefits quantified for each approach.
- Publication Date:
- OSTI Identifier:
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- DOE Contract Number:
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- Resource Relation:
- Conference: Presented at the SAE 2014 Thermal Management Systems Symposium, 22-24 September 2014, Denver, Colorado; Related Information: NREL (National Renewable Energy Laboratory)
- Research Org:
- National Renewable Energy Laboratory (NREL), Golden, CO.
- Sponsoring Org:
- USDOE Office of Energy Efficiency and Renewable Energy Vehicle Technologies Office
- Country of Publication:
- United States
- 33 ADVANCED PROPULSION SYSTEMS REAL-WORLD FUEL ECONOMY; ENGINE COLD STARTS; DYNAMOMETER TESTING; POWERTRAIN MODELING/SIMULATION; REAL-WORLD DRIVE CYCLES
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