Chemistry: physical processes – Physical processes – Crystallization
Patent
1974-01-08
1976-07-06
Richman, Barry S.
Chemistry: physical processes
Physical processes
Crystallization
23288FB, 23288FC, 23288K, 60286, 60289, 60298, 60299, 60306, B01J 804, F01N 315, B01J 802, B01J 800
Patent
active
039679292
ABSTRACT:
Air is pumped into the engine exhaust manifold to promote oxidation of unburned remnants in exhaust gas when the temperature in a catalytic converter is below a safe level. The air supply to the exhaust manifold is shut off and air is pumped into the catalytic converter to cool it if the temperature goes above the safe level. The catalytic converter includes a catalytic means, having an outer periphery, which is resiliently supported away from the inner circumference of the converter casing. Upon the catalytic means reaching a predetermined maximum temperature, air is pumped into the annular space located between the outer periphery of the catalytic means, which may comprise either a particulate or a monolithic catalyst, and the inner circumference of the casing. The annular space communicates with both an exhaust gas inlet chamber located upstream of the catalytic means and an exhaust gas outlet chamber located downstream of the catalytic means, for cooling the catalyst therein to prevent degradation of said catalyst.
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Tamazawa Tsuyoshi
Yaguchi Hiroshi
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Nissan Motor Co,. Ltd.
Richman Barry S.
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