A cylindrical can body capable of housing a honeycomb structure therein, the cylindrical can body including: a coil for induction-heating the honeycomb structure; a cylindrical member made of an insulating material; and a cylindrical metal member capable of housing the coil and the cylindrical member therein, wherein, in a cross section parallel to an axial direction of the cylindrical member, (i) the coil is provided radially outward from an inner circumferential surface of the cylindrical member, and at least a part of the coil is embedded in the cross section of the cylindrical member; or (ii) the coil is provided on an outer circumferential portion of the cylindrical member.

A fine particle detector includes an antenna, an electromagnetic wave generator configured to supply electromagnetic waves to the antenna, an electromagnetic wave detector configured to detect reflected waves of the electromagnetic waves emitted from the antenna, and a controller configured to estimate, based on intensities of the reflected waves detected by the electromagnetic wave detector, an accumulated amount of fine particles.

An assembly for treating gaseous emissions includes a substrate body having cells for the passages of emissions gas. Lengths of metal wire are located in selected ones of the cells and an induction heating coil is mounted adjacent the substrate body for generating a varying electromagnetic field. In this way the metal wires are heated, resulting in heating of the substrate body and heating of exhaust gas flowing in the cells. The metal wires are distributed non-uniformly through the substrate body to obtain a desired heating pattern.

An assembly for treating gaseous emissions includes a substrate body having cells for the passages of emissions gas. Lengths of metal wire are located in selected ones of the cells and an induction heating coil is mounted adjacent the substrate body for generating a varying electromagnetic field for inductive heating of the assembly including gaseous emissions passing along the cells. Within the cells, parts of the cell walls and parts of the wire surfaces are exposed to the passage of the gaseous emissions and both the cell wall parts and the wire surface parts have pollution treating catalyst at their surfaces.

An exhaust tailpipe/emissions filter employs a reusable/replaceable insert and is configured to slide into and/or onto the exhaust tailpipe of an automobile to reduce air pollution.

A catalytic wall-flow monolith filter having three-way catalytic activity for use in an emission treatment system of a positive ignition internal combustion engine comprising a porous filter substrate having a first face and a second face defining a longitudinal direction there between and first and second pluralities of channels extending in the longitudinal direction, wherein the first plurality of channels is open at the first face and closed at the second face and the channels of the first plurality of channels are defined in part by channel wall surfaces, wherein the second plurality of channels is open at the second face and closed at the first face and the channels of the second plurality of channels are defined in part by channel wall surfaces and wherein channel walls between the channel wall surfaces of the first plurality of channels and the channel wall surfaces of the second plurality of channels are porous, wherein a first on-wall coating comprising catalytic material having a layer thickness is present on at least the channel wall surfaces of the first plurality of channels, wherein the catalytic material on channel wall surfaces of the first plurality of channels comprises one or more platinum group metal selected from the group consisting of (i) rhodium (Rh) only; (ii) palladium (Pd) only; (iii) platinum (Pt) and rhodium (Rh); (iv) palladium (Pd) and rhodium (Rh); and (v) platinum (Pt), palladium (Pd) and rhodium (Rh) and a refractory metal oxide support, wherein: (i) an amount by weight of the one or more platinum group metal, per unit volume of the on-wall coating present on channel wall surfaces of the first plurality of channels varies continually along the longitudinal direction; and/or (ii) the layer thickness of the on-wall coating present on channel wall surfaces of the first plurality of channels varies continually along the longitudinal direction.

There is provided an exhaust purification device including a particulate filter configured to collect particulates contained in an exhaust gas, an oxidation catalyst disposed in a front stage of the particulate filter and configured to have a carrier partially or entirely made of a material which absorbs a microwave, a housing in which the particulate filter and the oxidation catalyst are arranged, and a microwave generator configured to generate a microwave to be irradiated onto the oxidation catalyst in a direction to which the exhaust gas flows.

The application provides articles, systems, and methods for adsorbing and desorbing nitrogen oxides (NO.sub.x) at desired temperatures. The catalytic article comprises a NO.sub.x adsorber composition comprising a platinum group metal (PGM) component disposed on or impregnated in a support material, and a substrate, wherein the catalytic article further comprises a magnetic material capable of inductive heating in response to an applied alternating electromagnetic field. The catalytic article further comprises a conductor associated therewith for receiving current and generating an alternating electromagnetic field in response thereto, wherein the conductor is positioned such that the generated alternating electromagnetic field is applied to at least a portion of the magnetic material. This field can inductively heat the magnetic material to heat the NO.sub.x adsorber composition to desorb the NO.sub.x from the NO.sub.x adsorber composition.

An exhaust purification apparatus includes a microwave irradiation device; a fine particle collection filter that collects fine particles contained in an exhaust gas; and a controller. The microwave irradiation device includes: an annular microwave transmission line; a first microwave generator; a second microwave generator; and a microwave measurement circuit coupled at least one of to the annular microwave transmission line, between the annular microwave transmission line and the first microwave generator, or between the annular microwave transmission line and the second microwave generator. A microwave generated by the first microwave generator and a microwave generated by the second microwave generator have the same frequency and different phases, and the controller determines whether or not a predetermined amount or more of depositions is deposited in the fine particle collection filter, based on the characteristics of a microwave measured by the microwave measurement circuit,

An exhaust gas control system includes: a housing, an exhaust gas purification catalyst, and a microwave irradiator. The microwave irradiator is configured to irradiate the exhaust gas purification catalyst with a microwave such that a standing wave that has: a high magnetic field region; and a high electric field region. The exhaust gas purification catalyst includes a carrier substrate and a catalytic substance that purifies the exhaust gas. The catalytic substance is disposed on the carrier substrate. The carrier substrate includes a magnetic body region and a dielectric region. The magnetic body region of the carrier substrate is disposed in the high magnetic field region in the housing. The dielectric region of the carrier substrate is disposed in the high electric field region in the housing. The magnetic body region has a magnetic body that absorbs the microwave. The dielectric region has a dielectric that absorbs the microwave.