Control system for exhaust gas purifying device

Details Control system for exhaust gas purifying device Control system for exhaust gas purifying device

1974-12-27

1976-05-18

Wolk, Morris O.

Chemistry: physical processes

Physical processes

Crystallization

60277, 60288, B01J 802, F01N 310, F01N 315

Patent

active

039574440

ABSTRACT:
In the device disclosed, a catalytic converter purifies exhaust gas from an engine. A sensor measures the temperature of the converter and an amplifier amplifies the measurement to produce a temperature signal. A differentiator produces a time-differential of the signal multiplied by a constant representing the time constant of the sensor. An operating circuit adds the multiplied time-differential to the signal to produce a voltage that is compensated for the response delay of the temperature sensor. Electromagnetic relays respond to the voltage by diverting the gases and the secondary air around the converter.

REFERENCES:
patent: 3017749 (1962-01-01), Heppler et al.
patent: 3680318 (1972-08-01), Nakajima et al.
patent: 3696618 (1972-10-01), Boyd et al.
patent: 3770946 (1973-11-01), Fertik et al.
patent: 3851469 (1974-12-01), Eichler et al.

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