Exhaust gas recycling system

Patent · Tue Sep 23 04:00:00 EDT 1980

OSTI ID:6538322

Herbert, S

An exhaust gas recycling system for reducing nitrogen oxides discharged into the atmosphere by internal combustion engines is described that is, comprises of an exhaust manifold having a baffle therein and a bypass pipe leading from the exhaust manifold to the air intake of the carburetor for returning a portion of the exhaust gases to the inlet of the carburetor in direct dependence upon the vacuum in the inlet to the carburetor, thus automatically recycling a substantial portion of the exhaust gases during those periods of operation when such recycling is desired, i.e., during acceleration and normal operation, when the vacuum at the carburetor inlet is high, and recycling only a minimal quantity of exhaust gases during those periods of operation when such recycling is not desired, i.e., during cranking, idling, deceleration and high load operation, when vacuum in the carburetor air intake is low.

• Assignee: IFI; EDB-81-057334
• Patent Number(s): US 4223650
• OSTI ID: 6538322
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330701* -- Emission Control-- Nitrogen Oxides
AIR POLLUTION CONTROL
CARBURETORS
CHALCOGENIDES
DESIGN
ENGINES
EQUIPMENT
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SPARK IGNITION ENGINES