Advances in Dynamic Skip Fire: mDSF and dDSF

Autoren

Steven Carlson, Dr. Elliott Ortiz-Soto, Dr. Kevin Chen, Dr. Matthew Younkins, Tula Technology, San Jose, CA, USA;
Dipl.-Ing. Mauro Scassa, Dipl.-Ing. Marco Nencioni, Dipl.-Ing. Shino George, FEV Italia S.r.l., Turin

Zusammenfassung

Worldwide regulations require sustained improvements in efficiency over the coming decades. Many technologies are being implemented throughout the industry to meet these coming challenges - among them, optimizing engine displaced volume, implementing advanced Miller combustion, and electrifying vehicle powertrains. Dynamic Skip Fire is synergistic with all these technologies, on both gasoline and diesel fueled engines. Gasoline powertrains combining this advanced cylinder deactivation with Miller and mild hybrid systems simultaneously achieve gains over a baseline sedan of over 20 %. Diesel powertrains can improve fuel consumption by up to 4 %. But more
importantly, Diesel Dynamic Skip Fire also raises exhaust temperature, improving the performance of NO_x aftertreatment. Dynamic Skip Fire has reached production on a V8 application and implementation on six-cylinder and four-cylinder engines will follow.
In this paper we present new DSF technologies, review fuel consumption improvements made to date, and project fuel consumption improvements into the future.

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