Exhaust purifying device for motor

Abstract

An exhaust gas purifying device of engine can increase the effective flow path length of a catalytic converter without increasing the whole length of the catalytic converter, and is in favor of the improvement of the exhaust gas purifying efficiency. The exhaust gas purifying device of engine is disposed with a catalytic converter (10) in an exhaust path (5, 6) of the engine (E), one end part of the catalytic converter (10) is formed with an exhaust leading-in chamber (21) connected to the upstream part of the exhaust path and an exhaust leading-out chamber (22) connected to the downstream part of the exhaust path (5, 6), both of them are arranged in parallel and connected to a catalyze chamber (25, 26), another end part of the catalytic converter (10) is formed with an exhaust roll over chamber (23) for guiding the exhaust gas through the catalyze chamber (25, 26) from the exhaust leading-in chamber (21) to the exhaust leading-out chamber (22) again through the catalyze chamber (25, 26), when the total cubage of the catalyze chamber (25, 26) is set to A, the cubage of the exhaust roll over chamber (23) is set to B, A / B is set to 0.1-4.

Description

technical field [0001] The invention relates to the improvement of an engine exhaust purification device equipped with a catalytic converter on the exhaust path of the engine. Background technique [0002] The above-mentioned engine exhaust purification devices are known as those disclosed in Patent Documents 1 and 2. [0003] Patent Document 1: (Japanese) Publication No. 60-29625 [0004] Patent Document 2: (Japanese) Unexamined Patent Publication No. 8-68316 [0005] In the exhaust purification device of such an engine in the past, since the exhaust gas to be purified flows toward the catalytic converter in one direction, if the flow path length of the catalytic converter is increased to improve the purification efficiency of the exhaust gas, the catalytic converter will The overall length of the engine becomes longer, causing the exhaust system of the engine to become larger and longer. Contents of the invention [0006] The present invention is developed in view of ...

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Problems solved by technology

[0005] In the exhaust purification device of such an engine in the past, since the exhaust gas to be purified flows toward the catalytic converter in one direction, if the flow path length of the catalytic converter is increased to improve the purification efficiency of the exhaust gas, the catalytic converter will The overall length of the engine becomes longer, resulting in a larger and longer exhaust system of the engine

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