Method and controller for exhaust gas temperature control

US7127882B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Andreas Pfaeffle · Löwenstein, DE
• Marcel Wuest · Ditzingen, DE
• Dirk Samuelsen · Ludwigsburg, DE
• Stefan Forthmann · Ludwigsburg, DE
• Michael Kolitsch · Rutesheim, DE
• Andreas Fritsch · Eggstätt, DE

Key dates

• Filing date: Jan 14, 2005
• Grant date: Oct 31, 2006
• Expiry date: Jan 14, 2025

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/405
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Described is a method for controlling a temperature downstream of a catalyst in the exhaust tract of an internal combustion engine including a first control loop in which a first control variable is calculated from a first deviation that is calculated from a first actual value and a first setpoint value and influences an intra-engine heat generation. In the process, the first actual value is determined as a measure of a temperature downstream of the catalyst. The method features a second control loop in which at least one second control variable is calculated from a second deviation that is calculated from a second actual value and a second setpoint value; a temperature upstream of the catalyst being determined as the second actual value. Also described is a controller which controls the sequence of such a method.