Abstract: Provided is a method for determining a performance of a particulate filter of an engine. The method determines an exhaust gas temperature upstream of the particulate filter, an exhaust gas temperature downstream of the particulate filter, and an exhaust gas mass flow upstream of said particulate filter The method further determines a modelled temperature based on the exhaust gas temperature and the exhaust gas mass flow upstream of the particulate filter. A residual value is determined on the basis of the exhaust gas temperature downstream of the particulate filter and the modelled temperature. An equivalent hole size of the particulate filter is then determined using a predetermined function that defines a relationship between the residual value and an equivalent hole size, where equivalent hole size indicates said performance of said particulate filter.

Abstract: The invention relates to a method for determining a performance of a particulate filter of an engine, comprising: determining at least one exhaust gas temperature upstream of said particulate filter; determining an exhaust gas temperature downstream of said particulate filter; determining an exhaust gas mass flow upstream of said particulate filter; determining a modelled temperature on the basis of said at least one exhaust gas temperature upstream of said particulate filter and said exhaust gas mass flow upstream of said particulate filter; determining a residual value on the basis of said exhaust gas temperature downstream of said particulate filter and said modelled temperature; and determining an equivalent hole size of said particulate filter from a predetermined function regarding a relation between said residual value and equivalent hole size as a basis for considering said performance of said particulate filter.

Abstract: An apparatus for the cleaning of crankcase gas from an internal combustion engine includes a housing and a separation chamber for the crankcase gas with a centrifugal rotor arranged for the cleaning of the crankcase gas in the separation chamber. The centrifugal rotor includes a drive shaft extending into a drive chamber of the apparatus. A turbine is connected to the drive shaft. A nozzle is arranged to receive pressurized liquid from the combustion engine and to direct the pressurized liquid in a jet from a nozzle opening against the turbine for rotation of the centrifugal rotor. An adapter element is configured such that the apparatus is mountable onto the combustion engine with a drive liquid passage in communication with the nozzle. The nozzle is integrally formed with the adapter element with a nozzle passage having a conical shape which converges in the flow direction towards the nozzle opening.

Abstract: An apparatus for the cleaning of crankcase gas from an internal combustion engine includes a housing and a separation chamber for the crankcase gas with a centrifugal rotor arranged for the cleaning of the crankcase gas in the separation chamber. The centrifugal rotor includes a drive shaft extending into a drive chamber of the apparatus. A turbine is connected to the drive shaft. A nozzle is arranged to receive pressurized liquid from the combustion engine and to direct the pressurized liquid in a jet from a nozzle opening against the turbine for rotation of the centrifugal rotor. An adapter element is configured such that the apparatus is mountable onto the combustion engine with a drive liquid passage in communication with the nozzle. The nozzle is integrally formed with the adapter element with a nozzle passage having a conical shape which converges in the flow direction towards the nozzle opening.