Internal combustion engine

US7028678B2 · kind B2 · utility

Inventors

• Thomas Betz · Langenselbold, DE
• Frank Duvinage · Kirchheim unter Teck, DE
• Rudiger Pfaff · Stuttgart, DE
• Heiko Sass · Tamm, DE

Key dates

• Filing date: Aug 5, 2004
• Grant date: Apr 18, 2006
• Expiry date: Aug 5, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S123/07
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In an internal combustion engine having a plurality of cylinders, some of which can be deactivated during operation of the engine, the cylinders which can be deactivated during operation are configured specifically for high load engine operation and have a lower compression ratio ε than the rest of the cylinders, which are configured specifically for low load engine operation.