EXHAUST PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE,申请号JP19910016826-传众专利搜索

EXHAUST PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINE

申请公布号：JPH04214918(A)

申请号：JP19910016826

申请日期：1991.01.18

申请公布日期：1992.08.05

申请人：

TOYOTA MOTOR CORP

发明人：HIROTA SHINYA;INOUE TOKUTA

分类号：F01N3/08;B01D53/94;F01N3/20;F01N3/28;F01N3/36;F01N9/00;F02B1/04;F02B3/06

主分类号：F01N3/08

摘要：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.