Patent ID: 11965447
Assignee: ROBERT BOSCH GMBH
Field: Chemical engineering (Chemistry)
Classification: CPC F  B  Y | IPC B  F

Claim 4:
5. A non-transitory electronic memory medium on which is stored a computer program for controlling an exhaust-gas aftertreatment system of an internal combustion engine having at least two SCR catalytic converters connected in series, the exhaust-gas aftertreatment system having a bypass including a bypass valve around a first SCR catalytic converter of the at least two SCR catalytic converters, exhaust gases from the internal combustion engine being completely or at least partially routed around the first SCR catalytic converter via the bypass, the computer program, when executed by a computer, causing the computer to perform the following steps:
ascertaining an activation of an exhaust brake operation for the internal combustion engine;
ascertaining a first actual temperature for the first SCR catalytic converter;
ascertaining an actual NH3 storage level for the first SCR catalytic converter;
ascertaining a modeled, maximally permitted NH3 storage level as a function of the actual NH3 storage level;
ascertaining a future temperature for the first SCR catalytic converter using a predictive temperature model;
ascertaining a comparison as a function of the ascertained first actual temperature and the ascertained future temperature; and
actuating the bypass valve as a function of the ascertained comparison to completely or partially open the bypass valve.