An exhaust aftertreatment unit for cleaning exhaust gases. The exhaust aftertreatment unit includes an emission reducing module being a diesel particulate filter, DPF, and/or a diesel oxidation catalyst, DOC, a selective catalyst reduction, SCR, catalyst, an electrical heating element arranged upstream of the SCR catalyst, a casing housing at least the emission reducing module, and a service lid removably arranged to cover a service opening of the casing through which the emission reducing module may be accessed. The electrical heating element is removably arranged relative the casing and is arranged accessible upon removal of the service lid.

An exhaust aftertreatment arrangement for converting NOx emissions. The exhaust aftertreatment arrangement includes a fluid channel for providing a fluid pathway for the exhaust gases, a selective catalyst reduction, SCR, catalyst, arranged in or downstream the fluid channel, an injector configured to inject a liquid reductant for providing ammonia to the SCR catalyst, the injector being arranged upstream of the SCR catalyst, a heating arrangement for heating the injected reductant, the heating arrangement being arranged upstream of the SCR catalyst and comprising an electrical heating element and at least one evaporation member configured to be heated by the heating element. The evaporation member is arranged in the fluid channel such that at least a portion of the injected liquid reductant comes into contact with the evaporation member when injected.

An exhaust gas/reactant mixing assembly for an exhaust gas system of an internal combustion engine includes a mixing channel defining a longitudinal axis and extending in the direction thereof. A reactant delivery unit delivers reactant (R) into the mixing channel and an exhaust gas supply channel is arranged upstream of the mixing channel. The exhaust gas supply channel opens into the mixing channel at an opening channel region, wherein the opening channel region has at least two opening channel portions opening into the mixing channel.

An energy generation device Including: a surface for supporting movement of a work material, and an energy converter. The surface is operable to induce movement of the work material relative to the surface. The energy converter is arranged to generate electrical energy based on the induced movement of the work material relative to the surface.

The invention relates to a mixer for a device for selective catalytic reduction of exhaust gases from internal combustion engines. The mixer comprises a structure of mixer elements through which the mixture of exhaust gas and reducing agent is to flow. The mixer elements have an electric current flowing through them for electrical heating due to the electrical resistance thereof. The invention further relates to a device for selective catalytic reaction of exhaust gases from an internal combustion engine having an exhaust gas pipe leading to a mixer according to the invention and having a reducing agent pipe which is connected to a reservoir for reducing agent and which opens into the exhaust gas pipe in the flow direction upstream of the mixer, and a catalyst in the flow direction downstream of the mixer.

A device, in particular an exhaust gas post-treatment device, having a pipe, in particular an exhaust pipe, through which a gas flow, in particular exhaust gas of an internal combustion engine, s is guided; having an injection device, associated with the pipe, for metered injection of a fluid medium, in particular exhaust gas post-treatment agent, into the gas flow; and having at least one mixing apparatus that is disposed in the pipe downstream from the injection device and has several air guidance elements disposed in one plane. Provision is made that the plane is oriented at least substantially perpendicularly to an injection direction of the injection device.

A two-stage mixer may include a guiding element and a mixing element. The guiding element may be configured to be fixedly mounted to an interior of an exhaust conduit. The mixing element may be configured to be fixedly mounted to the interior of the exhaust conduit in a position downstream from the guiding element. The mixing element may include a central disk, a plurality of mounting arms extending radially from the central disk, and a plurality of blades extending radially from the central disk. At least one mounting arm of the plurality of mounting arms may include a fin extending therefrom, and at least one blade of the plurality of blades may include a fin extending therefrom.

A heater is provided that includes at least one resistive heating element having a material with a non-monotonic resistivity vs. temperature profile and exhibiting a negative dR/dT characteristic over a predetermined operating temperature range along the profile. The heater can include a plurality of circuits disposed in a fluid path to heat fluid flow.

An exhaust system, especially for an internal combustion engine of a vehicle, includes an exhaust gas-carrying duct (14) and a reactant injection device (20) for injecting reactant (R) into exhaust gas (A) flowing in the exhaust gas-carrying duct (14). Downstream of the reactant injection device (20), a mixer device (22) supports the mixing of reactant (R) injected by the reactant injection device (20) with exhaust gas (A) flowing in the exhaust gas-carrying duct (14). Downstream of the reactant injection device (20) and upstream of the mixer device (22), a reactant heating device (24) extends in the exhaust gas-carrying duct (14). The exhaust gas (A) flows in and reactant (R) injected through the reactant injection device (20) flow around the heating device (24).

The present invention provides a fuel supply system, for an eco-friendly ship, which selectively uses an existing fuel and an ammonia fuel or uses a mixture thereof as a fuel for a propulsion engine and a power generation engine of a ship so as to follow ship greenhouse gas regulations to be reinforced in phases at major points until 2050.