Method and control apparatus for operating an internal combustion engine

US6754577B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Jochen Gross · Erlangen, DE
• Lutz Reuschenbach · Stuttgart, DE
• Georg Mallebrein · Stuttgart, DE
• Eberhard Klein · Plochingen, DE
• Michael Drung · Rochlitz, DE
• Lionel Martin · Gardanne, FR

Key dates

• Filing date: Nov 20, 2002
• Grant date: Jun 22, 2004
• Expiry date: Nov 20, 2022

Classification

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

Abstract

An internal combustion engine includes a combustion chamber, a crankshaft and inlet and outlet valves. The engine is operated with a method wherein a fresh air charge (rl) of the combustion chamber and the engine rpm (nmot) are considered when computing a pressure (ps) in a region lying upstream of the inlet valve. The computation is done by utilizing at least one of thermodynamic equations and flow equations at at least one discrete time point during a work cycle of the engine. Or, a pressure (ps) in the above region and the rpm (nmot) of the crankshaft are considered when computing the fresh air charge (rl) of the combustion chamber by utilizing one of thermodynamic equations and flow equations at at least one discrete time point during a work cycle of the engine.