Abstract: A method pertaining to an SCR system for cleaning of exhaust gases from an engine (150). A dosing unit (250) is in thermal contact with the engine's exhaust system and supplies a reducing agent to an exhaust duct (240) of the exhaust system. Determining (s340) whether there is an undesired temperature level of the dosing unit (250). If yes, limit (s360) the temperature of the exhaust duct (240) by controlling operation of the engine. Also, a computer program product containing program code (P) for implementing the method. Also a device and a motor vehicle (100) which is equipped with the device are disclosed.

Abstract: A method for cooling a dosing unit (250) pertaining to an SCR system for exhaust cleaning, wherein after cessation of exhaust flow, cooling a reducing agent dosing unit (250) by a reducing agent supplied to it. Also running a feed device to supply the coolant reducing agent at reduced power, compared with ordinary operation. A computer program product containing program code (P) for a computer (200; 210) implements a method of the invention. Also an SCR system and a motor vehicle which is equipped with the SCR system are disclosed.

Abstract: A method pertaining to an SCR system for cleaning of exhaust gases from an engine including a dosing unit (250) to supply a reducing agent to an exhaust duct (240): Determining (s340) whether there is an undesired temperature level of the dosing unit (250). If one is found, removing (s360) warmed reducing agent from the dosing unit (250) and supplying it to the exhaust duct (240). Calculating (s350) and removing an amount of reducing agent based on a prevailing temperature of the dosing unit (250), or removing warmed reducing agent. Also a computer program product containing program code (P) for a computer (200; 210) for implementing the method. Also a device of an SCR system and a motor vehicle (100) which is equipped with the device are disclosed.

Abstract: A method pertaining to an SCR system for exhaust cleaning, includes deciding about a need, after cessation of an exhaust flow, to cool a reducing agent dosing unit (250) by a reducing agent supplied to it, and includes predicting a temperature pattern of the dosing unit (250) as a basis for deciding about the need and predicting whether a predetermined temperature of the dosing unit will be reached after cessation of exhaust flow. Also a computer program product containing program code (P) for implementing the method, an SCR system and a motor vehicle which is equipped with the SCR system are disclosed.

Abstract: A method pertaining to an SCR system which includes a dosing unit (250) to supply reducing agent to an exhaust duct (240) for exhaust cleaning, and a container for reducing agent: the steps of determining (s320) a cooling requirement of the dosing unit (250) and choosing (s340) a limit level for reducing agent in the container (205) 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 (250) to supply reducing agent to an exhaust duct (240) for exhaust cleaning. A motor vehicle (100) is equipped with the device.

Abstract: 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.

Abstract: A method pertaining to an SCR system in which reducing agent in liquid form is supplied to a feed device (230) and via which feed device reducing agent is supplied to at least one consumption point (250) from a container (205): the steps of continuously detecting the feed pressure (P) which the feed device (230) furnishes, and controlling the operation of the feed device (230) on the basis of changes (P?) in the feed pressure (P), with the object of reducing the impact of unwanted air supply at the feed device (230). Also pertaining to a computer program product containing program code (P) for a computer (200; 210) for implementing a method according to the invention. Also an SCR system and a motor vehicle which is equipped with the SCR system are disclosed.

Abstract: For an SCR system for a motor vehicle (100; 110), the vehicle including a feed device (230) to feed reducing agent from a container (205) to a dosing unit (250) for supply of reducing agent to an exhaust duct of the vehicle (100; 110); a method of controlling the dosage of the dosing unit (250) by a pressure (Pr) at which reducing agent is dosed, and/or controlling pressure (Pr) of a rotation speed (RPM) of the feed device (230). Also a computer program product with program code (P) for a computer (200; 210) for implementing the method. Also an SCR system and a motor vehicle (100, 110) equipped with the SCR system.

Abstract: A method pertaining to an HC dosing system for exhaust cleaning for an engine which comprise a dosing unit (250) for fuel. After cessation of an exhaust flow, deciding about a need to cool the fuel dosing unit by use of fuel. Predicting a temperature pattern of the dosing unit (250) as a basis for deciding. Predicting whether a predetermined temperature of the dosing unit (250) will be reached after exhaust flow cessation. Also a computer programme product containing programme code (P) for implementing the method. Also an HC dosing system and a motor vehicle which is equipped with the HC dosing system are disclosed.

Abstract: A method pertaining to an SCR system for exhaust cleaning, includes deciding about a need, after cessation of an exhaust flow, to cool a reducing agent dosing unit (250) by a reducing agent supplied to it, and includes predicting a temperature pattern of the dosing unit (250) as a basis for deciding about the need and predicting whether a predetermined temperature of the dosing unit will be reached after cessation of exhaust flow. Also a computer programme product containing programme code (P) for implementing the method, an SCR system and a motor vehicle which is equipped with the SCR system are disclosed.

Abstract: A method pertaining to an SCR system which includes a dosing unit (250) to supply reducing agent to an exhaust duct (240) for exhaust cleaning, and a container for reducing agent: the steps of determining (s320) a cooling requirement of the dosing unit (250) and choosing (s340) a limit level for reducing agent in the container (205) on the basis of the cooling requirement. A computer programme product containing programme code (P) implements a method according to the invention. A device of an SCR system includes a dosing unit (250) to supply reducing agent to an exhaust duct (240) for exhaust cleaning. A motor vehicle (100) is equipped with the device.

Abstract: A method pertaining to an HC dosing system in which fuel in liquid form is supplied to a feed device (230) via which fuel is supplied from a container (205) to at least one consumption point (250) continuously detecting the feed pressure (P) which the feed device (230) furnishes. Also, the step of controlling the operation of the feed device (230) on the basis of changes (P?) in the feed pressure (P), to reduce the impact of unwanted air supply at the feed device (230). Also a computer programme product containing programme code (P) for a computer (200; 210) for implementing the method. Also an HC dosing system and a motor vehicle (100) which is equipped with the HC dosing system are disclosed.

Abstract: A method for cooling a dosing unit (250) pertaining to an SCR system for exhaust cleaning, wherein after cessation of exhaust flow, cooling a reducing agent dosing unit (250) by a reducing agent supplied to it. Also running a feed device to supply the coolant reducing agent at reduced power, compared with ordinary operation. A computer programme product containing programme code (P) for a computer (200; 210) implements a method of the invention. Also an SCR system and a motor vehicle which is equipped with the SCR system are disclosed.

Abstract: A method pertaining to an SCR system in which reducing agent in liquid form is supplied to a feed device (230) and via which feed device reducing agent is supplied to at least one consumption point (250) from a container (205): the steps of continuously detecting the feed pressure (P) which the feed device (230) furnishes, and controlling the operation of the feed device (230) on the basis of changes (P?) in the feed pressure (P), with the object of reducing the impact of unwanted air supply at the feed device (230). Also pertaining to a computer programme product containing programme code (P) for a computer (200; 210) for implementing a method according to the invention. Also an SCR system and a motor vehicle which is equipped with the SCR system are disclosed.

Abstract: A method pertaining to an HC dosing system for cleaning exhaust gases from an engine (150). A dosing unit supplies fuel to an exhaust duct (240): Determining (s340) whether there is an undesired temperature level of the dosing unit. If that is found, removing (s360) warmed fuel from the dosing unit (250) by supplying it to the vehicle's exhaust duct (240), entailing calculating (s350) and removing an amount of fuel based on a prevailing temperature of the dosing unit (250), or removing (s360) a predetermined amount in the form of substantially all of the warmed fuel of the dosing unit and transmitting it to the exhaust duct. Also computer programme product containing programme code (P) for a computer (200; 210) for implementing the method. Also to a device and a motor vehicle (100) which is equipped with the device are disclosed.

Abstract: A method pertaining to an SCR system for cleaning of exhaust gases from an engine including a dosing unit (250) to supply a reducing agent to an exhaust duct (240): Determining (s340) whether there is an undesired temperature level of the dosing unit (250). If one is found, removing (s360) warmed reducing agent from the dosing unit (250) and supplying it to the exhaust duct (240). Calculating (s350) and removing an amount of reducing agent based on a prevailing temperature of the dosing unit (250), or removing warmed reducing agent. Also a computer programme product containing programme code (P) for a computer (200; 210) for implementing the method. Also a device of an SCR system and a motor vehicle (100) which is equipped with the device are disclosed.

Abstract: A method for cooling a dosing unit (250) pertaining to HC dosing system for exhaust cleaning. The dosing unit (250) for fuel and a feed device (230) to supply fuel for cooling. The steps include cooling a fuel dosing unit (250) by fuel supplied to intermittently, in mutually successive respective periods of zero operating power of the feed device, or running at certain operating powers by running a fuel feed device (230) at reduced power compared with ordinary operation. A computer programme product containing programme code (P) for a computer (200; 210; 500) for implementing the method. An HC dosing system. A motor vehicle equipped with the system.

Abstract: A method for cooling a dosing unit pertaining to an HC dosing system for exhaust cleaning. The unit includes a dosing unit (250) for fuel and a feed device (230) for fuel for cooling the fuel dosing unit (250) using fuel supplied to it, and running the feed device (230) to supply coolant fuel at reduced power. Also a computer program product containing program code (P) for implementing the method. Also an HC dosing system and a motor vehicle equipped with the system.

Abstract: A method for cooling a dosing unit (250) pertaining to an SCR system for exhaust cleaning: after cessation of exhaust flow, cooling a reducing agent dosing unit (250) by reducing agent supplied to the unit. Intermittently running a feed device (230) to supply reducing agent, and running the feed device (230) at reduced power compared with its ordinary operation. Also a computer programme product containing programme code (P) for a computer (200; 210) for implementing the method.

Abstract: A method pertaining to an SCR system for cleaning of exhaust gases from an engine (150). A dosing unit (250) is in thermal contact with the engine's exhaust system and supplies a reducing agent to an exhaust duct (240) of the exhaust system. Determining (s340) whether there is an undesired temperature level of the dosing unit (250). If yes, limit (s360) the temperature of the exhaust duct (240) by controlling operation of the engine. Also, a computer programme product containing programme code (P) for implementing the method. Also a device and a motor vehicle (100) which is equipped with the device are disclosed.