Abstract: A device is provided for injection of a liquid agent, such as fuel or reducing agent, into the exhaust line from a combustion engine. The device (1) has a nozzle arrangement (20) having a nozzle head (21), from which the liquid agent is injectable into the exhaust line. The nozzle arrangement (20) has a first conduit (22) leading to the nozzle head (21) for supply of compressed gas, preferably in the form of compressed air, to the nozzle head, and a second conduit (23) leading to the nozzle head (21) for supply of the liquid agent to the nozzle head. The nozzle head (21) is provided with at least one outlet opening (24) connected to the first conduit (22) and to the second conduit (23), through which outlet opening the liquid agent is injectable into the exhaust line under atomization thereof after mixing with compressed gas in a mixing zone (25) inside the nozzle head.

Abstract: An exhaust gas recirculation system (10) for recirculating exhaust gases from an exhaust conduit (9) of a combustion engine (1), particularly a large combustion engine having an engine power of 500 kW or more, to an air intake (3) thereof, which system comprises:—two or more particulate filters (12a, 12b) arranged in parallel with each other;—valve means (17) for selectively switching the respective filter between an active state and an inactive state, the valve means being configured to allow exhaust gases to pass from the exhaust conduit to the air intake through a filter which is in the active state and to prevent exhaust gases from passing from the exhaust conduit to the air intake through a filter which is in the inactive state; and—filter regeneration means (40) for selectively initiating a regeneration of the respective filter when the filter is in the inactive state.

Abstract: A device is provided for injection of a liquid agent, such as fuel or reducing agent, into the exhaust line from a combustion engine. The device (1) has a nozzle arrangement (20) having a nozzle head (21), from which the liquid agent is injectable into the exhaust line. The nozzle arrangement (20) has a first conduit (22) leading to the nozzle head (21) for supply of compressed gas, preferably in the form of compressed air, to the nozzle head, and a second conduit (23) leading to the nozzle head (21) for supply of the liquid agent to the nozzle head. The nozzle head (21) is provided with at least one outlet opening (24) connected to the first conduit (22) and to the second conduit (23), through which outlet opening the liquid agent is injectable into the exhaust line under atomization thereof after mixing with compressed gas in a mixing zone (25) inside the nozzle head.

Abstract: The invention relates to a device for purifying exhaust gases from a combustion engine (1), comprising an arrangement (30) for recirculating exhaust gases from the engine to an air intake (2) thereof, a valve device (12) controlled by a control device (13) for regulating the relation between fresh air and recirculated exhaust gases supplied to the engine, and a regenerable filter (8) adapted to catch particulate constituents of the exhaust gases. The device further comprises means (14) for recording the temperature of the exhaust gases from the engine.

Abstract: The invention relates to a valve device comprising a valve housing (2) with a first and a second flow channel (3a, 3b), and a first and second damper shaft (8a, 8b), which are rotatable relative to the valve housing (2). A first damper (7a) is arranged in the first flow channel (3a) fixed to the first damper shaft (8a) and a second damper (7b) is arranged in the second flow channel (3b) fixed to the second damper shaft (8b). A rotatable regulating member (13) is arranged to control the rotational position of the damper shafts (8a, 8b) via two motion transfer members (20a, 20b), the respective motion transfer member (20a, 20b) being in engagement with a guiding (21) of the regulating member (13) so that the rotational position of the motion transfer member and thereby the rotational position of the associated damper shaft (8a, 8b) is controlled by the rotational position of the regulating member via this guiding (21).

Abstract: A device for purifying exhaust gases from a combustion engine (1) is provided with a first filter (10) arranged in an exhaust conduit (7) between the engine (1) and an exhaust outlet (8) for removing particular constituents from the exhaust gases, and a recirculation conduit (11) for diverting a part of the exhaust gases passing through the first filter (10) recirculating this part of the exhaust gases to the air intake (2) of the engine. A second filter (30) is arranged between the inlet end (20) of the recirculation conduit and the air intake (2) of the engine. A method for purifying exhaust gases from the combustion engine (1) and using this device to purify exhaust gas, in particular, from a diesel engine, are also provided.

Abstract: The invention relates to a valve device comprising a valve housing (2) with a first and a second flow channel (3a, 3b) and a first and second damper shaft (8a, 8b) that is rotatable relative to the valve housing (2). A first damper (7a) is arranged in the first flow channel (3a) fixed to the first damper shaft (8a) and a second damper (7b) is arranged in the second flow channel (3b) fixed to the second damper shaft (8b). A regulating member (11a) is arranged to act on said first and second damper shafts (8a, 8b) so as to achieve a rotation of either damper (7a, 7b) by rotation of one damper shaft at a time.

Abstract: The invention is related to a method and a device for recirculation of a part of exhaust gases from an exhaust pipe (6, 9) of a diesel engine (1) to the inlet of the engine, the exhaust gases being diverted from the exhaust pipe (6, 9) and directed through a recirculation conduit (10) to a controllable valve device (12) arranged between the engine and the air intake (2) thereof for allowing supply of air/recirculated exhaust gases in a desired relation to the combustion chamber of the engine (1). The invention also relates to a particular valve having two controllable inlets, said valve being useful in the method or device according to the invention, and a regulation method and device for regulating the air/fuel relation of a diesel engine.

Abstract: The invention relates to a valve device comprising a valve housing (2) with a first and a second flow channel (3a, 3b), and a first and second damper shaft (8a, 8b), which are rotatable relative to the valve housing (2). A first damper (7a) is arranged in the first flow channel (3a) fixed to the first damper shaft (8a) and a second damper (7b) is arranged in the second flow channel (3b) fixed to the second damper shaft (8b). A rotatable regulating member (13) is arranged to control the rotational position of the damper shafts (8a, 8b) via two motion transfer members (20a, 20b), the respective motion transfer member (20a, 20b) being in engagement with a guiding (21) of the regulating member (13) so that the rotational position of the motion transfer member and thereby the rotational position of the associated damper shaft (8a, 8b) is controlled by the rotational position of the regulating member via this guiding (21).

Abstract: The invention relates to a valve device comprising a valve housing (2) with a first and a second flow channel (3a, 3b) and a first and second damper shaft (8a, 8b) that is rotatable relative to the valve housing (2). A first damper (7a) is arranged in the first flow channel (3a) fixed to the first damper shaft (8a) and a second damper (7b) is arranged in the second flow channel (3b) fixed to the second damper shaft (8b). A regulating member (11a) is arranged to act on said first and second damper shafts (8a, 8b) so as to achieve a rotation of either damper (7a, 7b) by rotation of one damper shaft at a time.

Abstract: The invention relates to a device for purifying exhaust gases from a combustion engine (1), comprising an arrangement (30) for recirculating exhaust gases from the engine to an air intake (2) thereof, a valve device (12) controlled by a control device (13) for regulating the relation between fresh air and recirculated exhaust gases supplied to the engine, and a regenerable filter (8) adapted to catch particulate constituents of the exhaust gases. The device further comprises means (14) for recording the temperature of the exhaust gases from the engine.

Abstract: The invention is related to a method and a device for recirculation of a part of exhaust gases from an exhaust pipe (6, 9) of a diesel engine (1) to the inlet of the engine, the exhaust gases being diverted from the exhaust pipe (6, 9) and directed through a recirculation conduit (10) to a controllable valve device (12) arranged between the engine and the air intake (2) thereof for allowing supply of air/recirculated exhaust gases in a desired relation to the combustion chamber of the engine (1). The invention also relates to a particular valve having two controllable inlets, said valve being useful in the method or device according to the invention, and a regulation method and device for regulating the air/fuel relation of a diesel engine.

Abstract: The invention is related to a method and a device for recirculation of a part of exhaust gases from an exhaust pipe (6, 9) of a diesel engine (1) to the inlet of the engine, the exhaust gases being diverted from the exhaust pipe (6, 9) and directed through a recirculation conduit (10) to a controllable valve device (12) arranged between the engine and the air intake (2) thereof for allowing supply of air/recirculated exhaust gases in a desired relation to the combustion chamber of the engine (1). The invention also relates to a particular valve having two controllable inlets, said valve being useful in the method or device according to the invention, and a regulation method and device for regulating the air/fuel relation of a diesel engine.

Abstract: The invention is related to a method and a device for recirculation of a part of exhaust gases from an exhaust pipe (6, 9) of a diesel engine (1) to the inlet of the engine, the exhaust gases being diverted from the exhaust pipe (6, 9) and directed through a recirculation conduit (10) to a controllable valve device (12) arranged between the engine and the air intake (2) thereof for allowing supply of air/recirculated exhaust gases in a desired relation to the combustion chamber of the engine (1). The invention also relates to a particular valve having two controllable inlets, said valve being useful in the method or device according to the invention, and a regulation method and device for regulating the air/fuel relation of a diesel engine.

Abstract: The invention relates to a device for purifying exhaust gases from a combustion engine (1), comprising a first filter (10) arranged in an exhaust (7) between the engine (1) and an exhaust outlet (8) for removing particulate constituents from the exhaust gases, and a recirculation conduit (11) for diverting a part of the exhaust gases that have passed through said first filter (10) and recirculating this part of the exhaust gases to the air intake (2) of the engine. The device further comprises a second filter (30) arranged between the inlet end (20) of the recirculation conduit and the air intake (2) of the engine. The invention also relates to a method for purifying exhaust gases from a combustion engine. Furthermore, the invention relates to the use of the device for exhaust gas purification in particular at a diesel engine.

Abstract: A device and a method for exhaust gas purification in a combustion engine comprises an arrangement (30) for recirculating exhaust gases from the engine (1) to an air intake (2) thereof. An exhaust gas purification arrangement (31) is adapted to convert constituents in the exhaust gases to less environmentally hazardous substances. A filter arrangement (32) comprises at least one filter (33) adapted to liberate the exhaust gases from particulate constituents. This filter (33) is adapted to purify EGR-exhaust gases only. According to another aspect of the invention, 2 the filter (33) is aged in heat transferring relation to at least one convener unit (34) of the exhaust gas purification arrangement so as to receive, from the convener unit, a heat addition to promote regeneration of the filter by combustion of paniculate constituents deposited therein.