Abstract: The present invention relates to a system preferably being an exhaust system or a part of a system such as a part of an exhaust system for a combustion engine. The system or the part of the system comprising a pipe (1) through which a fluid, such as exhaust gasses, flows; a nozzle (3) adapted to atomize a liquid, being disposed. to crystallize as a result of contact with the fluid and adapted to introduce the liquid through one or more outlets into the pipe (1). The nozzle (3) being arranged so that the region being sprayed and/or the mixing region in which a mixing between the liquid being atomized by the nozzle and the fluid flowing in the pipe occur is/are flushed by fluid flowing through the pipe.

Abstract: A fluid transfer system for transferring fluid from a reservoir to a receiving device having a through flow device adapted to receive fluid from the reservoir and transfer fluid through the system or measure the amount of fluid being transferred from the reservoir to the receiving device, a controllable shut-off valve arranged upstream of the receiving device, and a controlling unit that controls at least the state of the shut-off valve. The present invention relates in particular to a fluid transfer system and methods of transferring fluid from a reservoir to a receiving device and controlling the state of the state of the shut-off valve so that the pressure of fluid being fed to the receiving device is above a first pre-selected pressure limit (Pmin) so that the delivered amount corresponds to a demand.

Abstract: The invention relates to a dosing pump unit for mixing a liquid reducing agent with an exhaust gas flow by means of a dosing pump which is connected, on the input side thereof, to a connection connectable to a reducing agent tank and, on the output side thereof, to a pressure pipe and a pipe for returning flow back to said reducing agent tank, wherein a non-return valve which is prestressed against a hydraulic pressure produced by the dosing pump is arranged in the pressure line, the return pipe is connected to the pressure pipe upstream of the non-return valve in the reducing agent flow direction and a first stop valve for selectively closing the return pipe is placed therein.

Abstract: The invention relates to a metering pump for admixing a fluid reduction agent into an exhaust gas flow, which comprises a premixing device in which the supplied reduction agent is mixed in a mixing region with a pressurized gas, wherein a first return valve is arranged in the premixing element in a supply conduit for the reduction agent, in front of the mixing region in the flow direction.

Abstract: The present invention provides a mixing device (1) for mixing urea with a gas, said urea being preferably dissolved in a fluid preferably water and said gas being preferably air. The mixing device comprises preferably a urea inlet (10) and a gas inlet (12) for feeding respectively urea and the gas into a mixing chamber (20) of the mixing device (4), and an outlet (14) for outlet of the mix of urea and gas from the mixing chamber (20), these inlets (10,12) and outlet (14) may preferably have a stream wise extension and runs preferably into the mixing chamber (20) and the outlet (14) originates preferably from the mixing chamber (20). Preferably, at least the gas inlet (12) for feeding air into the mixing chamber is designed so that depositing of urea crystals on selected surfaces of the said inlet is substantially (typically in the sense that deposited crystals does not clog the inlet) or totally avoided.

Abstract: The present invention relates to the field of atomizing fluids. Some embodiments described herein relate to a nozzle for atomization of one fluid in an exhaust system of a combustion engine or gas turbine, the nozzle comprising an inlet and two or more outlets, arranged so that fluid streams discharged from the two or more outlets impinge at a distance from the two or more outlets so that the fluid streams discharged from at least two of the two or more outlets impinge each other at a specified angle in the range of 70° to 95° so as to provide a spray by atomization of the fluid. The fluid streams may e.g. have a cross section in the order of 0.005 to 0.05 mm2 before impingement.

Abstract: The present invention relates to a dosing system for dosing a first fluid, preferably flowing in a first flow passage (5) into a stream of a second fluid, preferably flowing in a second flow passage (9). The system may e.g. be used to dose a reducing agent into an exhaust gas from a combustion engine (1). The system comprises a valve (6), a nozzle (3) having an outlet arranged downstream of the valve (6), a flow passage (5) through which the first fluid can flow from a reservoir (4) to the nozzle outlet via the valve (6), and a control system (7) adapted to receive input from one or more sensors (8) and based thereon determine a request value based on which a valve opening period is determined. The valve opening period is different from zero and independent on the request value when the request value is below a predefined threshold value.

Abstract: The invention relates to a metering pump assembly for admixing a fluid reduction agent into an exhaust gas flow with a metering pump for delivering the reduction agent and with a premixing device, in which in a mixing region, the reduction agent delivered by the metering pump is mixed with a pressurized gas, wherein the metering pump assembly comprises a pump head with a central plate in which at least the metering pump and the premixing device are arranged.

Abstract: The present invention relates to a fluid transfer system and method for transferring fluid from a reservoir to a delivery device typically being a nozzle. The present invention relates in particular to transferring urea in highly accurate metered amounts from a reservoir to a nozzle arranged within an exhaust system of a combustion engine or combustion engines.

Abstract: A metering pump assembly for admixing a fluid reduction agent from a supply container and a pressurized air flow into an exhaust gas flow of a combustion engine includes an assembly housing and a pre-mixer at least partially within the housing. A membrane pump within the housing is fluidly connected between the supply container and the pre-mixer. An electric motor generates a rotational output. A transmission converts the rotational output of the electric motor into translatory movement. The translatory movement drives the membrane pump to pump the reduction agent from the supply container into the pre-mixer. The pressurized air flow is in fluid communication with the pre-mixer and mixes with the reduction agent within the pre-mixer to form a reduction agent air mixture. An exit conduit fluidly connects the pre-mixer to the exhaust gas flow. The reduction air mixture is delivered through the exit conduit and into the exhaust gas flow.

Abstract: The present invention relates to a system preferably being an exhaust system or a part of a system such as a part of an exhaust system for a combustion engine. The system or the part of the system comprising a pipe (1) through which a fluid, such as exhaust gasses, flows; a nozzle (3) adapted to atomize a liquid, being disposed. to crystallize as a result of contact with the fluid and adapted to introduce the liquid through one or more outlets into the pipe (1). The nozzle (3) being arranged so that the region being sprayed and/or the mixing region in which a mixing between the liquid being atomized by the nozzle and the fluid flowing in the pipe occur is/are flushed by fluid flowing through the pipe.

Abstract: The present invention relates to a fluid transfer system and method for transferring fluid from a reservoir (2) and to (a) delivery device typically being (a) nozzle. The present invention relates in particular to transferring urea in highly accurate metered amounts from a reservoir (2) to a nozzle (5) arranged within an exhaust system (4) of a combustion engine (1) or combustion engines.

Abstract: The present invention relates to a fluid transfer system and method for transferring fluid from a reservoir (2) and to (a) delivery device typically being (a) nozzle. The present invention relates in particular to transferring urea in highly accurate metered amounts from a reservoir (2) to a nozzle (5) arranged within an exhaust system (4) of a combustion engine (1) or combustion engines.

Abstract: The present invention relates to a nozzle for atomization of one or more fluids by letting two streams of fluid impinge. In a nozzle according to the invention the fluid is divided in a number of streams each given kinetic energy. The amount of kinetic energy given to streams is so that when the streams impinge at conditions where substantial opposite directed velocity components of the streams exist the streams will break up into a spray having a small droplet size.

Abstract: The present invention relates to the field of atomizing one or more fluids. Various embodiments of the invention have been disclosed in which one or more fluid streams flow so that impingement of the fluid stream(s) occur which impingement provides atomization of the fluid. Various devices and methods for providing the atomization have been disclosed, where at least some of those provide a large span between maximum and minimum amount of fluid being atomized. The fluid streams may e.g. have a cross section in the order of 0.1 mm before impingement, and the resulting droplets after impingement may have a cross section in the order of 0.01 mm.