In order to suppress deposition of constituent of a reducing agent (dissolved matter) in an exhaust passage of an engine enhancing an elimination rate of NOx even when temperature of an exhaust emission from the engine is low, an exhaust emission purifying apparatus is provided with an electro-generative-heat carrier provided on an upstream side of an injection nozzle that supplies the reducing agent into the exhaust emission on upstream side of a reduction catalyst in an exhaust pipe, the exhaust emission being heated to a temperature equal to or higher than a melting point of the dissolved matter whereby deposition of the dissolved matter on an inner wall surface of the exhaust pipe is suppressed to effectively use the supplied reducing agent for catalytic reduction reaction, even when the exhaust emission temperature is lower than the melting point of the dissolved matter of the reducing agent.

Exhaust emission purifying apparatus for engine

An exhaust mixer (16) is provided for use in an engine exhaust system (10) downstream from an additive injector (14). The mixer (16) includes eight vanes (20), with four of the vanes (20A) extending from a first side (22) of the mixer (16) and arranged in an equally spaced circumferential array around a central axis (24), and the other four of the vanes (20B) extending from an opposite side (26) of the mixer (16) and arranged opposite from the other four vanes (20A) in an equally spaced circumferential array.

Exhaust Gas Additive/Treatment System and Mixer for Use Therein

An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement between the exhaust inlet and exhaust outlet. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.

Muffler with catalytic converter arrangement; and method

A dosing and mixing arrangement is disclosed herein. The arrangement includes a mixing tube having a constant diameter along its length. At least a first portion of the mixing tube includes a plurality of apertures. The arrangement also includes a swirl structure for causing exhaust flow to swirl outside of the first portion of the mixing tube in one direction along a flow path that extends at least 270 degrees around a central axis of the mixing tube. The arrangement is configured such that the exhaust enters an interior of the mixing tube through the apertures as the exhaust swirls along the flow path. The exhaust entering the interior of the mixing tube through the apertures has a tangential component that causes the exhaust to swirl around the central axis within the interior of the mixing tube. The arrangement also includes a doser for dispensing a reactant into the interior of the mixing tube.

Dosing and mixing arrangement for use in exhaust aftertreatment

The invention relates to an exhaust element (4) comprised by a line for exhausting the gases from a motor vehicle with a combustion engine and through the inside of which there flows a fluid consisting of the exhaust gases and of an additive to these gases, this exhaust element (4) comprising, mounted inside it, a static means (6) for mixing this additive in with these exhaust gases The static means (6) for mixing the additive in with the exhaust gases comprises at least one helicoid (61) having an axis extending in a direction that makes a set angle with the direction (D) of flow of the fluid through this exhaust element (4)

Exhaust element comprising a static means for mixing an additive into the exhaust gases

A catalytic converter consists of an exhaust gas inlet, an exhaust gas outlet, and a catalytic reactor located between the inlet and the outlet for reacting with the exhaust gas discharged by the internal combustion engine of a motor vehicle, so as to reduce air pollution. The exhaust gas inlet is provided with a vortex generator for causing the incoming exhaust gas to flow in a helical path into the inlet and than the catalytic reactor in which the exhaust gas reacts uniformly and thoroughly with all cross-sectional areas of the catalytic reactor of the catalytic converter.

Jyh-Chyang Yang

Papers

Catalytic converter provided with vortex generator