HONEYCOMB SUPPORT FOR EXHAUST GAS PURIFICATION CATALYST

摘要

PROBLEM TO BE SOLVED: To reduce exhaustion noise and exhaustion pressure loss while retaining the purification performance of a catalyst at a high level by improving the structure of the honeycomb support itself.

SOLUTION: A low-cell-density portion 12 lower in cell density than in the upstream is formed in the downstream in the flowing direction of exhaust gas. The passage for exhaust gas is expanded when exhaust gas flowing into the upstream flows into the low-cell-density portion 12, leading to a silencing effect due to expansion of the passage, like in common silencers, and the reduction of the pressure loss.

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