Spark plug construction for lean mixture burning internal combustion engines

Patent · Tue Feb 08 00:00:00 EST 1977

OSTI ID:7328742

Baczek, T A; James, L M.L.

An internal combustion engine has a main combustion chamber defined by a cylinder bore and its associated piston and a valved intake passage for introducing a lean fuel-air mixture in the combustion chamber. A novel spark plug mounted in the engine in place of the conventional spark plug has an apertured dome portion defining a limited size spark ignition chamber about the spark gap and a valved branch passage to the ignition chamber connected to a first fuel supply, such as a rich fuel-air mixture source, to achieve ignition thereof in the ignition chamber causing a flame discharge which ensures ignition of another fuel mixture, such as a lean mixture, in the main combustion chamber. Alternatively, a conventional spark plug may be used with a special adaptor assembled on the gap end of the plug which provides the limited size spark ignition chamber and valved branch passage.

• Assignee: Baczek and James Company, Inc.
• Patent Number(s): US 4006725
• OSTI ID: 7328742
• Resource Relation: Patent File Date: Filed date 12 Mar 1976
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
STRATIFIED CHARGE ENGINES
IGNITION SYSTEMS
AIR POLLUTION CONTROL
DESIGN
FUEL SYSTEMS
FUEL-AIR RATIO
VALVES
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
INTERNAL COMBUSTION ENGINES
POLLUTION CONTROL
330603* - Vehicle Design Factors- Engine System
330101 - Internal Combustion Engines- Spark-Ignition
330700 - Advanced Propulsion Systems- Emission Control