Method and device for operating an exhaust-gas after-treatment system
AssigneeFEV Motorentechnik GmbH
InventorsChristopher Severin, Juergen Schnitzler, Andreas Wiartalla
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for operating a motor vehicle exhaust-gas aftertreatment system (1), in which oxygen is fed to and removed from the oxygen tank (8) of an exhaust-gas aftertreatment component (7). According to the invention, the oxygen quantity in the oxygen tank (8) is determined and a rich-lean cycle is influenced in accordance with the determined oxygen quantity. The invention also relates to a motor vehicle exhaust-gas aftertreatment system (1), which permits a temperature regulation of the oxygen tank (8) and/or an uninterrupted desulphation during the transition between a rich operation and a lean operation.
Claims28
A method for operating a motor-vehicle exhaust-gas after-treatment system in which oxygen is fed to or removed from an oxygen accumulator of an exhaust-gas after-treatment component, wherein at least one changing parameter defined by the oxygen accumulator and its oxygen content is determined and is used in the operation of the motor-vehicle exhaust-gas after-treatment system.
14-15. (canceled)
An exhaust-gas after-treatment system with a connected internal combustion engine, wherein the internal combustion engine has a motor control system, and the exhaust-gas after-treatment system has at least one regulated catalytic converter and an oxygen accumulator, wherein a first probe is arranged before the oxygen accumulator and a second probe is arranged after the oxygen accumulator, wherein at least the first probe determines a first parameter characterizing the oxygen content, and a signal transmission of the parameter recorded by the first and the second probes to an evaluation unit is provided, and the evaluation unit is coupled with a motor control system with a regulation or control unit that takes into account a rich-lean cycle based on the determined parameter.
(canceled)
29-32. (canceled)
Dependencies are inferred from the claim text.