Search International and National Patent Collections

1. (WO2009124808) METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE

Pub. No.:    WO/2009/124808    International Application No.:    PCT/EP2009/052436
Publication Date: Oct 15, 2009 International Filing Date: Mar 2, 2009
IPC: F02D 41/14
Applicants: CONTINENTAL AUTOMOTIVE GMBH
RODATZ, Paul
RÖSEL, Gerd
Inventors: RODATZ, Paul
RÖSEL, Gerd
Title: METHOD AND DEVICE FOR OPERATING AN INTERNAL COMBUSTION ENGINE
Abstract:
An internal combustion engine has at least one cylinder, with which an injection valve for metering fuel is associated. It also has an exhaust system, in which an exhaust gas catalytic converter is disposed, a first exhaust gas probe is disposed upstream of or in the exhaust gas catalytic converter, and a second exhaust gas probe is disposed downstream of the exhaust gas catalytic converter. A lambda controller is provided, the controlled regulating thereof being ascertained as a function of a measuring signal (MS1) of the first exhaust gas probe and the control variable thereof acting on a fuel mass to be metered using the injection valve. Furthermore, a trim regulator is provided, the regulating variable thereof being ascertained as a function of a measuring signal (MS2) of the second exhaust gas probe and the first trim control variable (TRIM_SG1) thereof being ascertained as a function of a P regulator component of the trim regulator and the second trim control variable (TRIM_SG2) thereof being ascertained as a function of an I regulator component of the trim regulator. It is decided as a function of a predetermined evaluation of the first trim control variable (TRIM_SG1) whether an adaptation of the second trim control variable (TRIM_SG2) is to be performed. If it was decided that an adaptation of the second trim control variable (TRIM_SG2) is to be performed, an adaptation of the second trim control variable (TRIM_SG2) is executed.