Method of operating an internal combustion engine

US6813881B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Andreas Roth · Karlsruhe, DE
• Andreas Koring · Ludwigsburg, DE
• Beate Rittmann · Ditzingen, DE
• Holger Bellmann · Ludwigsburg, DE
• Klaus Winkler · Rutesheim, DE

Key dates

• Filing date: Oct 29, 2002
• Grant date: Nov 9, 2004
• Expiry date: Oct 29, 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, in particular for a motor vehicle, in which fuel may be injected into a combustion chamber during an intake phase in a first mode of operation or during a compression phase in a second mode of operation, and in which exhaust gases may be sent to a catalytic converter. A control unit determines a temperature difference between an actual exhaust gas temperature and a setpoint exhaust gas temperature at an operating point having a low exhaust gas temperature. In addition, at least one additional injection after combustion is implemented by the control unit as a function of the temperature difference.