Method and device for determining the gas intake in an internal combustion engine

US6352065B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ernst Wild · Oberriexingen, DE
• Lutz Reuschenbach · Stuttgart, DE
• Nikolaus Benninger · Lambach, DE
• Hendrik Koerner · Meckenheim, DE
• Werner Hess · Stuttgart, DE
• Hong Zhang · Schwieberdingen, DE
• Georg Mallebrein · Stuttgart, DE
• Harald Von Hofmann · Braunschweig, DE

Key dates

• Filing date: Jun 23, 2000
• Grant date: Mar 5, 2002
• Expiry date: Jun 23, 2020

Classification

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

Abstract

A method for determining a gas charge of an internal combustion engine having an intake manifold. The intake manifold has a gas mixture, which is a fresh air/fuel mixture and an exhaust gas, and further has a gas mass flow from the intake manifold and an intake manifold pressure. The method includes the steps of determining a partial pressure of the fresh air/fuel mixture in the gas mass flow by setting up a mass balance for a fresh air/fuel mixture mass flow, determining a partial pressure of the exhaust gas in the gas mass flow by setting up a mass balance for an exhaust gas mass flow, and determining a gas mass flow via a throttle based on a function that depends on a temperature compensation factor, a pressure compensation factor and a factor depending on a ratio of a pressure downstream of the throttle to a pressure upstream of the throttle. The pressure downstream of the throttle corresponds to the intake manifold pressure.