Catalytic converter having plural reaction stages with temperatu

Details Catalytic converter having plural reaction stages with temperatu Catalytic converter having plural reaction stages with temperatu

1974-01-21

1976-09-07

Wolk, Morris O.

Chemistry: physical processes

Physical processes

Crystallization

60299, B01J 804, F01N 315, F01N 700

Patent

active

039791858

ABSTRACT:
A catalytic converter for controlling unburned emissions from automotive exhaust gases includes a reactor chamber having inlet and outlet openings for passage of the exhaust gases therethrough. Oxidizing catalyst devices are distributed along the reactor chamber between the inlet and outlet openings for contact by exhaust gases flowing therethrough. Secondary air feed means is provided for feeding secondary air into the reactor chamber at a plurality of spaced-apart locations between the inlet and outlet openings. The secondary air feed means includes a conduit extending in a tortuous path through the reactor chamber for pre-heating secondary air flowing through the conduit prior to discharge into the reactor chamber. The flow rate and distribution of secondary air are arranged to prevent overheating of the catalyst. Malfunction of the converter is detected by comparing temperatures in the last two stages or by sensing the absolute temperature of the last stage.

REFERENCES:
patent: 1877523 (1932-09-01), Gordon
patent: 1923865 (1933-08-01), Handforth
patent: 2038567 (1936-04-01), Ittner
patent: 2947600 (1960-08-01), Clayton
patent: 3061416 (1962-10-01), Kazokas
patent: 3228755 (1966-01-01), Lottwville
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patent: 3537823 (1970-11-01), Innes
patent: 3547587 (1970-12-01), Innes
patent: 3733829 (1973-05-01), Henault
patent: 3740197 (1973-06-01), Scheitlin et al.
patent: 3823555 (1974-07-01), Cole
patent: 3832443 (1974-08-01), Hass

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