Abstract: The present invention involves a method for maintaining temperature in an exhaust gas treatment device for an internal combustion engine in a hybrid vehicle. The engine has a crankshaft and at least one cylinder. The hybrid vehicle has a fuel storage device and a fuel supply device. An exhaust gas treatment device is located downstream of the cylinder. The method comprises, in an engine off mode, pumping air to the exhaust gas aftertreatment device controlling the fuel supply device so that fuel is allowed to the exhaust gas aftertreatment device. Air flow to the exhaust gas aftertreatment device can be controlled by a throttle in an inlet duct to the engine and/or the fuel supply device to control the combustion and air-fuel ratio in the exhaust gas treatment device.

Abstract: A method and a system for regenerating an exhaust gas treatment device for an internal combustion engine having at least one cylinder are presented. The system comprises an exhaust gas treatment device, a fuel storage means, a fuel vapor retainer, and an engine control unit adapted to selectively allow fuel vapors from the fuel vapor retainer to reach the engine. The method comprises regenerating an exhaust gas treatment by allowing fuel vapors from the fuel vapor retainer into at least one of the engine cylinders, and inhibiting combustion in at least one of the cylinders into which fuel vapors are to allowed.

Abstract: The present invention involves a method for maintaining temperature in an exhaust gas treatment device for an internal combustion engine in a hybrid vehicle. The engine has a crankshaft and at least one cylinder. The hybrid vehicle has a fuel storage device and a fuel supply device. An exhaust gas treatment device is located downstream of the cylinder. The method comprises, in an engine off mode, pumping air to the exhaust gas aftertreatment device controlling the fuel supply device so that fuel is allowed to the exhaust gas aftertreatment device. Air flow to the exhaust gas aftertreatment device can be controlled by a throttle in an inlet duct to the engine and/or the fuel supply device to control the combustion and air-fuel ratio in the exhaust gas treatment device.

Abstract: A method for an exhaust gas treatment device (8) in an engine system, and an engine system comprising an internal combustion engine with at least one cylinder (2) are presented. The engine system further comprises an exhaust gas treatment device (8), fuel storage means (20), a fuel vapor retainer (22), and an engine control unit adapted to control valve means (25) so as to selectively allow purge gas from the fuel vapor retainer (22) to reach the engine. The method comprises performing a purge gas exhaust gas treatment device regeneration (207), comprising allowing to purge gas from the fuel vapor retainer (22) into at least one of the cylinders (2), and inhibiting combustion in at least one of the cylinders (2) into which purge gas is allowed.

Abstract: A method and a system for regenerating an exhaust gas treatment device in an internal combustion engine having at least one cylinder are presented. The method comprises regenerating the device by inhibiting combustion in at least one of the engine cylinders and controlling the fuel injection system so that fuel is allowed into at least one of the cylinders in which combustion is inhibited.