초록 ▼

An exhaust gas purification system for an internal combustion engine is herein disclosed which comprises an exhaust system having an adsorption flow path provided with an adsorbent capable of adsorbing harmful components such as hydrocarbons in an exhaust gas, and a catalyst flow path provided with

An exhaust gas purification system for an internal combustion engine is herein disclosed which comprises an exhaust system having an adsorption flow path provided with an adsorbent capable of adsorbing harmful components such as hydrocarbons in an exhaust gas, and a catalyst flow path provided with at least one catalyst for decreasing the harmful components in the exhaust gas, the exhaust gas purification system being characterized in that an outlet of the adsorption flow path is joined to the catalyst flow path at a predetermined position on the upstream side of the catalyst to form a joint portion; the exhaust gas produced at least at the time of the operation start of the internal combustion engine is divided so as to flow through both the adsorption flow path and the catalyst flow path in a predetermined ratio, so that part of harmful components such as the hydrocarbons are adsorbed by the adsorbent in the adsorption flow path; and when the adsorbed harmful components begin to desorb from the adsorbent with the temperature rise of the adsorbent, the catalyst on the downstream of the joint portion is activated.

대표청구항 ▼

[ What is claimed is:] [1.] An exhaust gas purification system for purifying exhaust gas flowing therethrough from an internal combustion engine, comprising:a catalyst flow path including at least one catalyst for treating harmful components in the exhaust gas;an adsorbent flow path including an out

[ What is claimed is:] [1.] An exhaust gas purification system for purifying exhaust gas flowing therethrough from an internal combustion engine, comprising:a catalyst flow path including at least one catalyst for treating harmful components in the exhaust gas;an adsorbent flow path including an outlet and an adsorbent for adsorbing harmful components in the exhaust gas, wherein the outlet of the adsorbent flow path is connected to the catalyst flow path at a position upstream of the catalyst, thereby forming a joint portion; andmeans for maintaining separate flow of the exhaust gas such that the exhaust gas flows through both the catalyst flow path and the adsorbent flow path at a predetermined ratio of flow rates, whereby harmful components in the exhaust gas are adsorbed by the adsorbent in the adsorbent flow path during cold-start of the engine, and the catalyst of the catalyst flow path is activated when harmful components adsorbed by the adsorbent are desorbed with a rise in temperature of the adsorbent.