Exhaust control system for internal combustion engine

Details Exhaust control system for internal combustion engine Exhaust control system for internal combustion engine

1992-06-29

1993-08-10

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

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

60292, 60300, 123 9015, 123323, 123339, F01N 328

Patent

active

052338312

ABSTRACT:
An exhaust control system has a first catalytic device disposed in an exhaust line and a second catalytic device, which is smaller in capacity than the first catalytic device, disposed in the exhaust line upstream from the first catalytic device. The system includes a shutter device disposed in the exhaust line upstream from the first catalytic device. The shutter device is caused, by a controller, to close the exhaust line during a predetermined period from a start of engine cranking, before an engine is warmed up, and open the exhaust line after the engine is warmed up, thereby promoting activation of the catalytic devices.

REFERENCES:
patent: 2906253 (1959-09-01), Nallinger
patent: 3503716 (1970-03-01), Berger
patent: 3723070 (1973-03-01), Houdry

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