The present disclosure generally relates to emission control catalyst articles comprising a platinum group metal (PGM) enriched zone, methods of making such emission control catalyst articles, and methods of using such emission control catalyst articles.

A device for treating exhaust gases of an internal combustion engine includes: a heating disk arranged in a housing; and a main catalytic converter arranged downstream of the heating disk in the flow direction in the housing. The flow can pass through the heating disk and the main catalytic converter in the flow direction along a plurality of flow channels. The heating disk is formed from a metallic honeycomb body and the main catalytic converter is formed from a ceramic honeycomb body fixed in relation to the housing by a fixing structure. The heating disk is electrically contacted by an electrical feedthrough guided through the housing from the outside to the inside.

An exhaust gas purification device has a metal substrate and a catalyst layer on the metal substrate, wherein the metal substrate is a wound body of one or a plurality of metal foils, at least one of the one or a plurality of metal foils is a perforated metal foil having holes, the catalyst layer contains noble metal catalyst particles and a carrier for carrying the noble metal catalyst particles, and more noble metal catalyst particles are present in the catalyst layer on side surfaces of holes, which face an upstream side of an exhaust gas flow, than in the catalyst layer on side surfaces of holes, which face a downstream side of the exhaust gas flow.

An automotive catalytic converter includes a three-way catalyst having Rh as the only precious metal configured as a front zone and a three-way catalyst having a mixture of Rh and Pd, Pt, or both configured as a rear zone, such that an exhaust gas from an internal combustion engine passes through the front zone before passing through the rear zone to minimize sulfur poisoning of the catalytic converter.

The present invention relates to a heating device for heating a gas flow, in particular an exhaust gas flow of an internal combustion engine, said heating device comprising an electrically conductive heating element that can be flowed through by the gas flow in an axial direction and that has at least two heating segments that are sectionally separated from one another by a gap that is in particular open at one side; a carrier device having at least one electrically insulating carrier element that at least sectionally surrounds the heating element in a peripheral direction and/or at least sectionally covers a marginal region of at least one axial end face of the heating element, wherein the carrier element has at least one spacer section that projects into the gap; and a housing section in which the heating element and the carrier device are held.

A lean gasoline exhaust treatment catalyst article is provided, the article comprising a catalytic material applied on a substrate, wherein the catalytic material comprises a first composition and a second composition, wherein the first and second compositions are present in a layered or zoned configuration, the first composition comprising palladium impregnated onto a porous refractory metal oxide material and rhodium impregnated onto a porous refractory metal oxide material; and the second composition comprising platinum impregnated onto a porous refractory metal oxide material. Methods of making and using such catalyst articles and the associated compositions and systems employing such catalyst articles are also described.

An automatic purifying device for engine exhaust gases is disclosed. Exhaust gases flow through a necked portion to be speeded and the temperature of the exhaust gases is kept uniform after entering an exhaust inlet, and the speeded exhaust gases then pass through a flared mouth so as to be diffused through metal catalyst carriers and a straight-through ceramic filter or wall-flow filter, allowing the poisonous emissions such as nitrogen oxides (NOx) to collide with the metal catalyst carriers to generate high heat to ignite carbon particles, carbon monoxide, hydrocarbons, and the like which are then decomposed and reduced to nitrogen gas and water by added urea or ammonia in the middle of passing through the straight-through ceramic filter or wall-flow filter, where the generated water can then be discharged through a drain port, thereby decreasing pollution to the environment.

An engine capable of reducing the content of hydrocarbon in exhaust gas is provided. When viewed parallel to cylinder center axes, tangential virtual lines extending from endpoints of curved port central axes along tangent lines of the endpoints pass intake valve ports, straight port central axes extending from the endpoints of the curved port central axes are further away from a partition wall than the tangential virtual lines, and intake air bent through curved ports passes straight ports and is sucked through the intake valve ports along the wall between the cylinders.

A device for providing a liquid additive, including at least one metallic insert, which is coated, at least in sections, with a plastic coating made of polyethylene (PE). At least one plastic structure made of a high-density polyethylene (HD-PE) or polypropylene (PP) is sprayed onto the plastic coating.

An emissions control substrate. The emissions control substrate includes a first end and a second end opposite to the first end. A plurality of channels extend between the first end and the second end, and are configured to direct exhaust from an engine through the substrate. The emissions control substrate is three-dimensionally printed