Rear Axle Heat Exchanger - Utilization of Engine Coolant for Reduced CO
Emissions and Fuel Consumption
This paper describes the design, development, and operation of a rear axle dual-shell heat exchanger on the RAM 1500 Light Duty truck. This system has been proven to increase fuel economy and reduce exhaust emissions, particularly CO2, on the EPA Cold City schedule. The energy conversion strategy was first explored using math modeling. A PUGH analysis associated with concept selection is included. To refine the hardware and develop a control strategy prior to testing, a portable flow cart was developed to assess system performance and to correlate the multi-node heat transfer model. Bench testing focused on the durability and functional aspects of integrating the dual-shell axle cover with the axle and coolant delivery system through a comprehensive design and validation plan. Vehicle testing included various fuel economy and emissions related driving schedules to quantify the benefits.
Citation: Schumaier, T., Bartlett, M., Laugen, A., Scott, T. et al., "Rear Axle Heat Exchanger - Utilization of Engine Coolant for Reduced CO2 Emissions and Fuel Consumption," SAE Int. J. Adv. & Curr. Prac. in Mobility 2(6):3532-3546, 2020, https://doi.org/10.4271/2020-01-1411. Download Citation
Timothy Schumaier, Matthew Bartlett, Alex Laugen, Timothy Scott, Jasbir Singh, Jay Sopko, Paul Troy
FCA US LLC, Sweet Briar College
WCX SAE World Congress Experience
SAE International Journal of Advances and Current Practices in Mobility-V129-99EJ
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