Methods for turbocharged engine with cylinder deactivation and variable valve timing

US9739213B2 · kind B2 · utility

Assignee

• Ford Global Technologies, LLC · US

Inventors

• Joerg Kemmerling · Monschau, DE
• Franz Arnd Sommerhoff · Aachen, DE
• Andreas Kuske · Geulle, NL
• Vanco Smiljanovski · Bedburg, DE
• Helmut Matthias Kindl · Aachen, DE
• Werner Willems · Aachen, DE
• Claudia Katharina Herudek · Aachen, DE
• Michael Forsting · Rheydt, DE
• Bas van den Heuvel · Wijnandsrade, NL
• Wilbert Hemink · Limburg, DE
• Claudia Conee · Aachen, DE
• Richard Fritsche · Wermelskirchen, DE

Key dates

• Filing date: Mar 26, 2015
• Grant date: Aug 22, 2017
• Expiry date: Jul 24, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/40
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A system and methods are described for a turbocharged engine, comprising powering the engine using a first operating cylinder, supplementing the power using a second switchable cylinder, deactivating the second switchable cylinder responsive to a load below a first threshold, and closing a first shut-off valve downstream of a compressor during the partial deactivation to prevent a first turbocharger from imparting a delivery action into a second compressor during the partial deactivation. Embodiments are further described wherein a bypass line in a second exhaust line further serves as a short-circuit line to prevent the second compressor from imparting a delivery action against the closed first shut-off valve. A variable valve timing is then included to further optimize the combustion process during the partial deactivation.