You are here:
Vehicle Component Benchmarking Using a Chassis Dynamometer: Using a 2013 Chevrolet Malibu and a 2013 Mercedes E350 (SAE Paper 2015-01-0589)
Citation:
MOSKALIK, A., D. BARBA, AND P. DEKRAKER. Vehicle Component Benchmarking Using a Chassis Dynamometer: Using a 2013 Chevrolet Malibu and a 2013 Mercedes E350 (SAE Paper 2015-01-0589). In Proceedings, 2015 SAE World Congress, Detroit, MI, April 21 - 23, 2015. SAE International, Warrendale, PA, SAE #2015-01-0589, (2015).
Impact/Purpose:
The benchmarking study described in this paper uses data from chassis dynamometer testing to determine the efficiency and operation of vehicle driveline components. First, a 2013 Chevrolet Malibu is tested on the chassis dynamometer, and dynamometer, emissions, and CAN data from the vehicle are used to construct efficiency maps and operation strategies for the engine and transmission. These maps are compared to maps produced from the same components in a standalone benchmarking process, with good results. Both sets of maps are used in the ALPHA model, showing a good agreement with actual EPA fuel economy testing and with each other. The benchmarking methodology is extended to a 2013 Mercedes E350 diesel vehicle. Dynamometer, emissions, and CAN data from the vehicle are used to construct efficiency maps and operation strategies for the engine and transmission. These maps are used in the ALPHA model, again showing a good agreement with actual EPA fuel economy testing.
Description:
Light-duty vehicle greenhouse gas (GHG) and fuel economy (FE) standards for MYs 2012 -2025 are requiring vehicle powertrains to become much more efficient. The EPA is using a full vehicle simulation model, called the Advanced Light-duty Powertrain and Hybrid Analysis (ALPHA), to estimate the effects of advanced technology in reducing greenhouse gas emissions. The ALPHA model requires inputs of vehicle component efficiencies and operations. Although some model inputs must be estimated, many can be determined by benchmarking vehicles and their components that are currently in production. However, a full, standalone benchmarking procedure of each driveline component separately can be costly and time-consuming.