Exhaust gas purification system

Système d'épuration des gaz d'échappement

Abgasreinigungssystem

Abstract

An exhaust gas purification system (10) includes an exhaust purifying element (21, 22) for purifying exhaust gas, a selective reduction catalyst (26) for promoting reduction of NOx contained in the exhaust gas with a reducing agent, and a housing (11) for accommodating the exhaust purifying element (21, 22). The housing (11) includes an outer wall having an accommodating portion (23), which is recessed into the housing (11). A supply hole (23d) is formed on a bottom of the accommodating portion (23). A pipe (24) that is located inside the housing (11) has a passage through which an interior of the pipe (24) communicates with an exterior of the pipe (24). The pipe (24) is configured to guide exhaust gas toward the selective reduction catalyst (26) through the passage and the interior of the pipe (24). The pipe (24) has an end communicating with the supply hole (23d). The injection device (25) of the exhaust gas purification system (10) injects the reducing agent to an interior of the pipe (24) through the supply hole (23d).

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