Title:
PURIFICATION METHOD FOR EXHAUST GAS
Document Type and Number:
Japanese Patent JPH04224223
Kind Code:
A
Abstract:
PURPOSE:To purify exhaust gas of an internal combustion engine by removing oxides of nitrogen, carbon monooxide, and hydro-carbon in the exhaust gas. CONSTITUTION:An exhaust gas passage 2 of an internal combustion engine is divided into two. When a combustion condition of the internal combustion engine is lean, exhaust gas passes through a passage in which catalytic converter rhodium is charged, and when the combustion condition of the internal combustion engine is stoichio? or rich, the exhaust gas passes through a passage in which copper-contained crystalline silicate or copper-contained zeolite catalyst is charged.
Inventors:
IIDA KOZO
NOJIMA SHIGERU
NOJIMA SHIGERU
Application Number:
JP41196590A
Publication Date:
August 13, 1992
Filing Date:
December 20, 1990
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
B01J23/40; B01J23/63; B01J29/06; B01J35/02; F01N3/28; B01D53/94; F02B1/04; (IPC1-7): B01D53/36; B01J23/40; B01J23/56; B01J29/06; B01J35/02; F01N3/28
Domestic Patent References:
| JPH0431615A | 1992-02-03 |
Attorney, Agent or Firm:
Akira Uchida (2 outside)