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Title: 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.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
1160192
Report Number(s):
NREL/PR-5400-62443
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
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
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS REAL-WORLD FUEL ECONOMY; ENGINE COLD STARTS; DYNAMOMETER TESTING; POWERTRAIN MODELING/SIMULATION; REAL-WORLD DRIVE CYCLES