Scania Cv Ab

Daniel Arvidsson

Andreas Liljestrand

Per Bremberg

A method pertaining to an SCR system for cleaning of exhaust gases from an engine including a dosing unit () to supply a reducing agent to an exhaust duct (): Determining (s) whether there is an undesired temperature level of the dosing unit (). If one is found, removing (s) warmed reducing agent from the dosing unit () and supplying it to the exhaust duct (). Calculating (s) and removing an amount of reducing agent based on a prevailing temperature of the dosing unit (), or removing warmed reducing agent. Also a computer program product containing program code (P) for a computer () for implementing the method. Also a device of an SCR system and a motor vehicle () which is equipped with the device are disclosed.

Method and device pertaining to dosing unit of SCR system

A method pertaining to an SCR system which includes a dosing unit () to supply reducing agent to an exhaust duct () for exhaust cleaning, and a container for reducing agent: the steps of determining (s) a cooling requirement of the dosing unit () and choosing (s) a limit level for reducing agent in the container () on the basis of the cooling requirement. A computer program product containing program code (P) implements a method according to the invention. A device of an SCR system includes a dosing unit () to supply reducing agent to an exhaust duct () for exhaust cleaning. A motor vehicle () is equipped with the device.

Method and device pertaining to cooling of dosing units of SCR systems

Disclosed is a method pertaining to SCR systems for exhaust cleaning whereby liquid is supplied to a feed device via which it is supplied to a dosing unit at a consumption point of the SCR system. The method includes continuously determining cumulative amounts of liquid dosed via the dosing unit. Need for replacement or cleaning of a filter unit for said liquid is also determined on the basis of the cumulative amounts of liquid dosed. The method further includes dosing at least part of the liquid supplied via the feed device and feeding undosed liquid back in a return flow to enable it to be supplied again to the feed device. Also disclosed is a computer program product that includes code for a computer for implementing the disclosed method.

Growing community of inventors

Värmdö, Sweden

Daniel Arvidsson