Device for the operation of an internal combustion engine

US7431025B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Wojciech Cianciara · Grünthal, DE
• Gerd Rösel · Dresden, DE

Key dates

• Filing date: Jul 14, 2006
• Grant date: Oct 7, 2008
• Expiry date: Jul 14, 2026

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/1441
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Disclosed is an internal combustion engine comprising at least one cylinder and an exhaust manifold in which a catalytic converter, a first exhaust gas probe, and a second exhaust gas probe are disposed. The first exhaust probe is located upstream from the catalytic converter while the second exhaust gas probe is arranged downstream therefrom. A lambda Controller is provided which is configured so as to determine a lambda correction factor in accordance with a first test signal that is assigned to the first exhaust gas probe. A trim controller is provided to which a setpoint value and an actual value of a second test signal allocated to the second exhaust gas probe are fed as a control difference. The trim controller is configured so as to determine a proportionate corrective factor. A control signal unit is embodied so as to determine a control signal for apportioning fuel into the cylinder in accordance with the lambda correction factor and additionally determine the control signal for apportioning fuel into the cylinder according to the proportionate corrective factor in a diagnostic mode of a component associated with the exhaust manifold.