Document Type and Number:
Japanese Patent JPS5425564
Kind Code:
B2
Abstract:
An exhaust gas purification apparatus for a vehicle in which exhaust gases from an internal combustion engines are subject to a catalytic reaction in a reducing catalyst bed and an oxidizing catalyst bed to remove nitrogen oxides and combustible constituents in the engine exhaust gases. In the device, the reducing catalyst bed and oxidizing catalyst bed are disposed in series in the flowing direction of exhaust gases within a cylindrical casing mounted integrally to a joining portion of exhaust manifold, and secondary air supplying means is provided when the exhaust gas temperature at a point downstream of the catalyst beds is lower than a predetermined setting. A passage for connecting the joining portion of the exhaust manifold directly with an exhaust pipe is provided, and a valve means is disposed in this passage to be opened to pass the exhaust gases through this passage when the exhaust gas temperature detected by a temperature detector mounted to the exhaust pipe is higher than the predetermined setting.
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Application Number:
JP3818574A
Publication Date:
August 29, 1979
Filing Date:
April 03, 1974
Export Citation:
International Classes:
F01N3/20; F01N3/22; F01N3/28; F01N3/32; F01N13/02; F01N13/10