Exhaust gas purifying method and apparatus for internal combusti

Details Exhaust gas purifying method and apparatus for internal combusti Exhaust gas purifying method and apparatus for internal combusti

1985-06-03

1986-10-21

Cline, William R.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60285, F01N 320

Patent

active

046177949

ABSTRACT:
Exhaust gas purifying method and apparatus for internal combustion engines in which the temperature of an exhaust gas purifying catalyst is detected and, as desired, oxygen content of exhaust gas is further detected, and in which the actual air-fuel ratio is varied toward the higher air-fuel ratio side and the lower air-fuel ratio side with respect to the theoretical air-fuel ratio, in accordance with the frequency and amplitude preset dependent on the kind of the catalyst and set based on these measured values.

REFERENCES:
patent: 4024706 (1977-05-01), Adawi
patent: 4148188 (1979-04-01), Tokura
patent: 4199938 (1980-04-01), Nakase
patent: 4376369 (1983-03-01), Horikoshi

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