Exhaust purifying device for internal combustion engine

Abstract

Abstract PURPOSE:To improve the NOx purification ratio of lean NOx catalyst in a lean NOx catalyst-equipped internal combustion engine. CONSTITUTION:An internal combustion engine 1, lean NOx catalyst 3 provided in its exhaust system 16, an HC generating means to generate HC of a low boiling point using used fuel, and an HC supply means to supply the low boiling point HC generated by the low boiling point HC generating means to the upstream of the lean NOx catalyst 3 are provided. The HC generating means generates the low boiling point HC by thermal decomposition of fuel, fractional distillation, or both of thermal decomposition and fractional distillation. The low boiling point HC acts effectively for purification of NOx, thereby the NOx purification ratio for the lean NOx catallyst is improved.

Inventors

• 👤 Shinya Hirota
• 👤 信也 広田
• 👤 Tokuta Inoue
• 👤 井上　悳太

Bibliographic Details