Method and apparatus using proportional residual gas storage to reduce NO/sub x/ emissions from internal combustion engines

Patent · Thu Oct 11 04:00:00 EDT 1973

OSTI ID:7365514

Yagi, S; Inoue, K

A device is described for minimizing NO/sub x/ emissions from a four-cycle spark-ignition internal combustion reciprocating piston engine having a main combustion chamber with a valved intake passage for a lean mixture, an auxiliary combustion chamber having a valved intake passage for a rich mixture, and a torch nozzle restriction connecting the chambers. A residual gas chamber has a restricted opening at one end connected to the auxiliary chamber and a spark plug. The restricted opening causes mixing of a rich fuel mixture and residual gas in the residual gas chamber during the compression stroke of the piston so that, at the time of ignition, the concentration of residual gas near the end wall of the residual gas chamber is greater than in the region containing the spark plug.

• Assignee: Honda Giken Kogyo Kabushiki Kaisha
• Patent Number(s): US 3933134
• OSTI ID: 7365514
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330701* -- Emission Control-- Nitrogen Oxides
AUTOMOBILES
AUTOMOTIVE FUELS
CHALCOGENIDES
COMBUSTION CHAMBERS
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
EXHAUST GASES
FLOW REGULATORS
FUELS
GASEOUS WASTES
INTERNAL COMBUSTION ENGINES
MIXING
NITROGEN COMPOUNDS
NITROGEN OXIDES
NOZZLES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
SPARK IGNITION ENGINES
VALVES
VEHICLES
WASTES