Spark-ignition internal combustion engine capable of reducing noxious constituents in exhaust gases

Patent · Tue Jul 22 04:00:00 EDT 1980

OSTI ID:5013109

Aoki, T; Minami, H

A description is given of a spark-ignition internal combustion engine having a cylinder in which a combustion chamber is defined by a cylinder head and a piston crown, comprising: air-fuel mixture supply means for supplying an air-fuel mixture induced into the combustion chamber, said air-fuel mixture supply means being communicated through an intake passage with the combustion chamber and having a throttle valve; exhaust gas recirculating means for recirculating a portion of exhaust gases with the induced air-fuel mixture into the combustion chamber, said exhaust gas recirculating means including conduit means which connects an exhaust passage of the engine with the intake passage downstream of the throttle valve a plurality of spark plugs disposed within the combustion chamber for reliably igniting the air-fuel mixture containing the recirculated exhaust gases; a three-way catalytic converter communicable through the exhaust passage with the combustion chamber to purify the noxious constituents in the exhaust gases discharged from the combustion chamber, said three-way catalytic converter being designed to reduce nitrogen oxides and oxidize carbon monoxide and hydrocarbons in the exhaust gases; and air-fuel ratio control means for controlling air-fuel ratio of the air-fuel mixture supplied into the combustion chamber at stoichiometric value so as to accomplish effective purification of noxious constituents in said three-way catalytic converter, whereby the emission levels of nitrogen oxides, carbon monoxide and hydrocarbons in the exhaust gases are considerably decreased improving fuel consumption.

• Assignee: Nissan Motor Co Ltd (Japan)
• Patent Number(s): US 4213430
• OSTI ID: 5013109
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
330700* -- Advanced Propulsion Systems-- Emission Control
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC CONVERTERS
CHALCOGENIDES
CONTROL EQUIPMENT
DESIGN
ENERGY CONSUMPTION
ENGINES
EQUIPMENT
EXHAUST GASES
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLOW REGULATORS
FLUIDS
FUEL CONSUMPTION
FUEL-AIR RATIO
GASEOUS WASTES
GASES
HEAT ENGINES
HYDROCARBONS
INTERNAL COMBUSTION ENGINES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
SPARK IGNITION ENGINES
TUBES
VALVES
WASTES