Cost effective hybrid boosting solution with application to light duty vocational vehicles
by Robert P. Benjey; Brandon Biller; Vasilios Tsourapas
International Journal of Powertrains (IJPT), Vol. 4, No. 3, 2015

Abstract: Industry trends toward down-sized engines and energy recovery systems have led to numerous individual solutions. These typically include turbochargers, engine start/stop systems, variable valve timing/activation systems and motor/generator/starters (Lake et al., 2004; Lecointe and Monnier, 2003; Petitjean et al., 2004; Bishop et al., 2007; Robinette and Powell, 2011; Henry et al., 2001; Walters et al., 2004). The ultimate goal is to maintain good vehicle performance while dramatically improving fuel economy. This document is an extension of previous work centred on passenger cars presented at the 2013 Dresden Boosting Conference (Tsourapas and Benjey, 2013). Simulation results that predict the operation, performance and fuel economy of an electrically assisted variable speed (EAVS) boosting system based on Eaton's TVS® Supercharger when applied to a larger vehicle with aggressive duty cycles are presented in this article. In this study, a naturally aspirated 5.0 L V8 is replaced by a 3.7 L V6 gasoline boosted engine. Test results for light duty passenger vehicles indicate significant improvement in vehicle performance and fuel economy. The focus of this analysis is to an aggressive drive cycle with high amounts of engine boost at low engine speeds powered by regenerated (brake) energy to enable aggressive engine down-sizing.

Online publication date: Wed, 16-Sep-2015

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