Emission control system and method for internal combustion engin

Power plants – Internal combustion engine with treatment or handling of... – Material from exhaust structure fed to engine intake

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Details

123119A, F02B 7510, F01N 316, F02M 2506

Patent

active

042055261

ABSTRACT:
Fresh air is introduced into the exhaust pipe leading to the muffler for an internal combustion engine, while the air and exhaust gas mixture is cooled, not only in the muffler but also in a circuitous tube which extends from the muffler to the normal discharge or tail pipe and in which a special cooler may be installed. From the outlet of the special cooling tube, which faces forwardly, a portion of the air and exhaust gas mixture, now cooled, is led from a Y-connection to the intake tube of the air filter, so that the air and exhaust gas mixture will be introduced into the intake system prior to the carburetor. A rearwardly slanting arm of the Y-connection connects the front end of the special cooling pipe with the normal tail pipe. The carburetor has one or more air bleed tubes leading into the mixture passage at or below the butterfly valves, so that at idling speeds, a small amount of fresh air is introduced, irrespective of the position of the butterfly valves, to overcome any tendency for the engine, when idling, to cough or sputter due to the introduction of an air and exhaust gas mixture to the air filter intake.

REFERENCES:
patent: 3013546 (1961-12-01), Bonifield
patent: 3262437 (1966-07-01), Bradshaw
patent: 3306033 (1967-02-01), Cornelius
patent: 3492980 (1970-02-01), Beck
patent: 3672340 (1972-06-01), Bomba
patent: 3712281 (1973-01-01), Ruth
patent: 3739583 (1973-06-01), Tourtellotte et al.
patent: 3844261 (1974-10-01), Garcea

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