Catalytic treatment of exhaust gas responsive to engine temperat

Details Catalytic treatment of exhaust gas responsive to engine temperat Catalytic treatment of exhaust gas responsive to engine temperat

1974-10-25

1976-08-03

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

23288FA, 60302, F01N 314, F02B 7510

Patent

active

039721841

ABSTRACT:
Disclosed herein is an exhaust system for an internal combustion engine including a catalytic converter. A valve-controlled by-pass around the catalyst bed in the converter is provided such that the exhaust gas is only passed through the catalyst bed during engine warm-up. The valve is automatically controlled by engine temperature such that after the engine attains operating temperature the by-pass valve opens and the exhaust gas by-passes all catalyst.

REFERENCES:
patent: 3150922 (1964-09-01), Ashley
patent: 3273971 (1966-09-01), Baddorf
patent: 3297400 (1967-01-01), Eastwood
patent: 3302394 (1967-02-01), Pahnke
patent: 3440817 (1969-04-01), Saufferer
patent: 3646764 (1972-03-01), Nakajima
patent: 3662540 (1972-05-01), Murphey
patent: 3732696 (1973-05-01), Masaki

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