METHODS FOR TURBOCHARGED ENGINE WITH CYLINDER DEACTIVATION AND VARIABLE VALVE TIMING

• Main Authors: CLAUDIA KATHARINA HERUDEK, MICHAEL FORSTING, WERNER WILLEMS, BAS LAMBERTUS VAN DEN HEUVEL, CLAUDIA CONEE, FRANZ ARND SOMMERHOFF, VANCO SMILJANOVSKI, WILBERT HEMINK, RICHARD FRITSCHE, HELMUT MATTHIAS KINDL, ANDREAS KUSKE, JOERG KEMMERLING
• Format: Patent
• Language: English
• Published: 14.10.2015
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

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 element 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 element. A variable valve timing is then included to further optimize the combustion process during the partial deactivation.