A gas flow regulating device for cleaning a particulate filter is configured to be arranged in connection to the filter at a side thereof in a through-flow of a gas to be used for cleaning the filter. The device is a standalone unit configured to be removably installed in connection with a cleaning process, wherein the device includes a frame defining a gas flow passage and a gas flow regulating element arranged inside the frame, wherein the gas flow regulating element is provided with at least one opening for gas through-flow and a blocking part capable of blocking a portion of a gas through-flow area of the filter such as to force the gas to flow through the at least one opening, wherein the gas flow regulating element is movably arranged between at least two different positions, and wherein the at least one opening covers different portions of the gas through-flow area in the different positions. An arrangement for cleaning a particulate filter including such a device, and a method for cleaning a particulate filter using such a device are also provided.

Methods and systems are provided for an SCR device configured to store an amount of urea. In one example, a system may include rotating a plurality of plates in the SCR as exhaust gas flows through the SCR.

A chemical heat storage device includes a reaction vessel accommodating a heat storage material, a heat exchange flow path provided so that a heat-exchange fluid flows along an outer surface of the reaction vessel, and the chemical heat storage device being configured in such a manner that the reaction vessel is rotated and the heat storage material is agitated, by a flow force of the heat-exchange fluid.

Methods and systems are provided for an automatic branch communication valve. In one example, a method includes rotating the valve to a second position in response to a non-electrical actuation of the valve.