Abstract: A method that determines a correct or an incorrect position of a temperature sensor in an emission control system, the method including: determining a first reference temperature within a first temperature interval; measuring a first temperature with the temperature sensor corresponding to the first temperature interval; determining a second reference temperature within a second temperature interval; measuring a second temperature with the temperature sensor corresponding to the second temperature interval; determining a value for a characteristic parameter based on the first reference temperature, the first measured temperature, the second reference temperature and the second measured temperature; comparing the determined value for the characteristic parameter with a predetermined characteristic parameter threshold value that is based upon the determined operation parameter results for different positions of the temperature sensor for predetermined engine operation characteristics; and based upon the compari

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: Methods and systems are provided to monitor a quantity relating to particulate mass M in at least one exhaust pipe arranged downstream of a combustion engine. A first determination device determines a reduction ? of a pressure difference dP over at least one or several particulate filters, arranged downstream of the combustion engine. This reduction ? is related to a pressure difference dPref over one or more corresponding reference particulate filters. A second determination device determines a quantity related to the particulate mass M, based on the determined reduction ? of the pressure difference dP and a predetermined correlation between the reduction ? and the quantity related to the particulate mass M, so that use of soot sensors in the exhaust pipe may be avoided. A comparison device compares the quantity with a defined threshold value Mth and a providing device provides indications related to the comparison.

Abstract: A method that determines a correct or an incorrect position of a temperature sensor in an emission control system, the method including: determining a first reference temperature within a first temperature interval; measuring a first temperature with the temperature sensor corresponding to the first temperature interval; determining a second reference temperature within a second temperature interval; measuring a second temperature with the temperature sensor corresponding to the second temperature interval; determining a value for a characteristic parameter based on the first reference temperature, the first measured temperature, the second reference temperature and the second measured temperature; comparing the determined value for the characteristic parameter with a predetermined characteristic parameter threshold value that is based upon the determined operation parameter results for different positions of the temperature sensor for predetermined engine operation characteristics; and based upon the compari

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: Methods and systems are provided to monitor a quantity relating to particulate mass M in at least one exhaust pipe arranged downstream of a combustion engine. A first determination device determines a reduction ? of a pressure difference dP over at least one or several particulate filters, arranged downstream of the combustion engine. This reduction ? is related to a pressure difference dPref over one or more corresponding reference particulate filters. A second determination device determines a quantity related to the particulate mass M, based on the determined reduction ? of the pressure difference dP and a predetermined correlation between the reduction ? and the quantity related to the particulate mass M, so that use of soot sensors in the exhaust pipe may be avoided. A comparison device compares the quantity with a defined threshold value Mth and a providing device provides indications related to the comparison.