Diffuser plate

摘要

A diffuser plate for a vehicle exhaust system comprises a body having a primary opening and a plurality of secondary openings circumferentially spaced apart from each other about the primary opening. In one example, the diffuser plate is positioned between an exhaust manifold and a catalytic converter. Exhaust gas from the exhaust manifold flows through the primary and secondary openings in the diffuser plate to provide a thorough mixed flow that is evenly distributed across an inlet to a catalyst substrate, and also enable an oxygen sensor to accurately measure engine cylinder exhaust gas chemistry.

主权项

1. A vehicle exhaust system comprising:
an exhaust manifold having a manifold outer housing with a plurality of ports configured for attachment to an engine; a catalytic converter having a converter housing with an inlet end configured for attachment to an outlet of the manifold outer housing, the converter housing defining an internal cavity; a substrate positioned within the internal cavity; a diffuser plate positioned upstream of the substrate and within the manifold outer housing, the diffuser plate having a primary opening and a plurality of secondary openings circumferentially spaced apart from each other about the primary opening; and wherein the manifold outer housing includes an inner surface that defines the outlet, and wherein the inner surface includes a plurality of depressions circumferentially spaced apart from each other, and wherein the diffuser plate includes a plurality of attachment legs with each leg being received in one depression of the plurality of depressions to directly attach the diffuser plate to the exhaust manifold.