A method of removing or reducing the particulate buildup within the diesel particulate filter of an aftertreatment system includes the selective application of a blocking agent to a filter medium of the diesel particulate filter, displacement of the particulate from the filter medium using a fluid stream, and subsequent removal of the blocking agent.

An exhaust system including an upstream portion, a downstream portion, a service access, and a silica filter defines an exhaust gas flow path. The downstream portion includes an aftertreatment component. The service access is between the upstream portion and the downstream portion. The silica filter includes a silica filter element and a housing enclosing the silica filter element. The housing includes a filter gas inlet and a filter gas outlet, and defines a filter flow path through the silica filter element between the filter gas inlet and the filter gas outlet. The silica filter element is configured to filter silica from exhaust gases of the engine and structured to create a uniform distribution of silica throughout the silica filter element. The silica filter is configured to be removed and replaced through the service access. The exhaust gas flow path includes the filter flow path.

An exhaust gas treatment device for an exhaust gas system of an internal combustion engine, including a housing which has at least two equivalently formed receiving elements for arranging the AGN modules, and at least one exhaust gas guide module which is inserted into one of receiving elements, and an exhaust gas guide module for an exhaust gas treatment device or this type.

A method for cleaning a filter arrangement which has a first fluid connector, a second fluid connector and a filter device which is arranged between the first and second fluid connectors and which has a surface to which contaminants can adhere. The method has the following steps: connecting the first fluid connector to a blowing chamber which has a gas connector, at least partially filling the blowing chamber with a liquid, and generating a cleaning pulse, in which gas is conducted under pressure via the gas connector into the blowing chamber for a first time duration, such that a gas-liquid mixture is forced via the first fluid connector through the filter device and out of the second fluid connector.

According to one embodiment, a method for cleaning and requalifying a component of an exhaust aftertreatment system includes inspecting the component using an x-ray processing technique. The method further includes associating the plurality of cleaning techniques with a plurality of compositions of material, and cleaning the component according to at least one of the plurality of cleaning techniques associated with the composition of material.

The present disclosure provides a method and apparatus for measuring ash deposit levels in a particulate filter comprising at least one cell. One or more indicator components is inserted into the at least one cell so as to lie upon any deposits contained therein. Radiation is emitted from a radiation source into the cell, and the position of the one or more indicator components is detected on the basis of the emitted radiation. The deposit level within the cell is then calculated on the basis of the position of the one or more indicator components.

The present invention relates to a novel hydraulic cleaning apparatus for a particulate matter reduction device that enables rapid drying and differential pressure measurement, effectively cleaning, drying, and measuring differential pressure of particulate matter reduction devices in diesel vehicles. When an operator places the particulate matter reduction device (1) on the support case (21) and inputs a cleaning command via the input unit (37), the control unit (36) automatically controls the water supply pump (25), ring blower (26), three-way valve (27), and heater (31) to supply cleaning water and air to the particulate matter reduction device (1). This automated process cleans and dries the device, making operation very simple. Additionally, the differential pressure gauge (38) in the main body (10) measures the differential pressure of the particulate matter reduction device (1), enabling easy determination of whether the particulate matter reduction filter (3) has been sufficiently cleaned.

A method and apparatus for applying a dry powder to a porous substrate (10) comprising: a) locating the porous substrate (10) in a holder (2) such that an inlet face (11) is in communication with an inlet chamber (15) and an outlet face (12) is in communication with a vacuum generator; b) establishing a primary gas flow through the porous substrate (10) using the vacuum generator to apply a pressure reduction to the outlet face (12); c) spraying the dry powder into or within the inlet chamber (15) such that dry powder is entrained in the primary gas flow and passes through the inlet face (11) of the porous substrate (10) to contact a porous structure (13) of the porous substrate (10); d) during the spraying of the dry powder directing a secondary gas flow onto and/or across the inlet face of the porous substrate (10); and e) using a pressure and/or a flow rate of the secondary gas flow to control an axial distribution of the dry powder that is deposited in the porous structure (13) of the porous substrate (10).