Simulated Real-World Energy Impacts of a Thermally Sensitive Powertrain Considering Viscous Losses and Enrichment 2015-01-0342
It is widely understood that cold ambient temperatures increase vehicle fuel consumption due to heat transfer losses, increased friction (increased viscosity lubricants), and enrichment strategies (accelerated catalyst heating). However, relatively little effort has been dedicated to thoroughly quantifying these impacts across a large set of real world drive cycle data and ambient conditions. This work leverages experimental dynamometer vehicle data collected under various drive cycles and ambient conditions to develop a simplified modeling framework for quantifying thermal effects on vehicle energy consumption. These models are applied over a wide array of real-world usage profiles and typical meteorological data to develop estimates of in-use fuel economy. The paper concludes with a discussion of how this integrated testing/modeling approach may be applied to quantify real-world, off-cycle fuel economy benefits of various technologies.
Citation: Jehlik, F., Wood, E., Gonder, J., and Lopp, S., "Simulated Real-World Energy Impacts of a Thermally Sensitive Powertrain Considering Viscous Losses and Enrichment," SAE Int. J. Mater. Manf. 8(2):239-250, 2015, https://doi.org/10.4271/2015-01-0342. Download Citation
Forrest Jehlik, Eric Wood, Jeffrey Gonder, Sean Lopp
Argonne National Laboratory, National Renewable Energy Laboratory
SAE 2015 World Congress & Exhibition
SAE International Journal of Materials and Manufacturing-V124-5EJ, SAE International Journal of Materials and Manufacturing-V124-5