Browse Publications Technical Papers 2011-01-0377

Optimization of an Electric Turbo Compounding System for Gasoline Engine Exhaust Energy Recovery 2011-01-0377

A large proportion (about 33%) of the fuel energy is lost through exhaust gas in a gasoline engine. Electric turbo compounding (ETC) is a promising technology for gasoline engine exhaust energy recovery. In this paper, optimization of an ETC system for turbocharged gasoline engines is carried out. The ETC system has a turbo-generator that is in parallel with the turbocharger, the flow distribution between the turbocharger and the turbo-generator is controlled. The engine exhaust energy is recovered by the turbo-generator with fixed geometry turbine (FGT) or variable nozzle turbine (VNT). The design and control of the ETC system are optimized for best recovery of engine exhaust energy at engine full load and part load operating conditions. The system performance is studied by 1D simulation methods. The gasoline engine is modeled with the GT-POWER software and the turbochargers and turbo-generators are modeled with turbo through-flow models. The GT-DRIVE software is used to evaluate the system performance under driving cycles. Results show that the optimized ETC system can improve the engine fuel economy significantly not only at engine full load operating conditions but also at practical operating conditions under US06 and FTP75 driving cycles.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:

Optimizing Performance and Fuel Efficiency for a Formula SAE Car


View Details


Adaptive Turbo Matching: Radial Turbine Design Optimization through 1D Engine Simulations with Meanline Model in-the-Loop


View Details


Optimization of Inlet Port Performance on Emission Compliance of Naturally Aspirated DI Diesel Engine


View Details