Catalytic converter accessory apparatus

Details Catalytic converter accessory apparatus Catalytic converter accessory apparatus

1992-04-10

1993-02-16

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

422176, F01N 328

Patent

active

051859980

ABSTRACT:
The present invention features an automotive catalytic converter accessory device for improving the converter's efficiency and operational life. The accessory device has a housing disposed in the manifold exhaust pipe, upstream of the catalytic converter. The housing contains a hollow conduit that conveys the exhaust gases of the manifold to the entrance or interface of the catalytic converter. The conduit has a diffuser portion having a baffle plate disposed at the downstream end thereof, just before the converter inlet. The flow is divided into a bifurcated stream of gases that passes through the baffle plate. The outer stream of exhaust gas is caused to swirl as it passes through slots disposed at the end of the conduit ahead of the baffle plate. The major portion of the exhaust stream is caused to pass through a large central aperture in the baffle plate, along with the outer, swirling stream. This major portion of the exhaust stream maintains a substantially linear flow, thus reducing back pressure and turbulence in the overall flow. The gas entering the catalytic converter bathes the entire substrate due to both the diffusion and the swirling action of part of the exhaust flow. The outer swirling portion of the exhaust stream expands into the wider converter cavity to bathe the outer portions of the substrate. The inner, linear portion of the exhaust stream entering the converter cavity bathes the central, or inner, portion of the substrate. Thus, the entire catalytic substrate is bathed by the exhaust gases entering the converter chamber.

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