Inline exhaust device to improve efficiency of a catalytic converter

Abstract

A device (14), to improve the working of an inline catalytic converter (13), the device (14) affecting the flow of hot exhaust gases to improve the transfer of heat from the exhaust gases to the catalytic converter (13). The device (14) may include a profile comprising a plurality of recesses or cavities (figure 1) to facilitate increased turbulence of the gases to improve heat absorption, or a valve (24) which is operable between an open or closed or partially closed position, the valve being downstream from the catalytic converter and functioning to increase the resident time of the exhaust gases about the catalytic converter (13).

Description

technical field [0001] The present invention relates to a device which can be placed in or connected to the exhaust stream of a diesel engine vehicle and which can enhance said catalytic converter in the exhaust stream, usually by keeping the components of the catalytic converter hotter than the other components. Converter efficiency. Background technique [0002] Internal combustion engines, such as gasoline engines, can produce toxic emissions including carbon monoxide, nitrogen oxides, and the like. [0003] One way these noxious emissions can be reduced is by placing catalytic converters in the exhaust stream. A common catalytic converter is a three-way converter, which reduces the three emissions that need to be limited - carbon monoxide, VOC and nitrogen oxides. Catalytic converters generally use two different types of catalysts, reducing catalysts and oxidizing catalysts. The converter typically comprises a honeycomb ceramic or metal structure coated with a metal c...

AI Technical Summary

Problems solved by technology

In this way, the temperature of the exhaust gases drops rapidly to a level that cannot properly maintain the catalytic converter in its operating temperature range

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