Auxiliary combustion chamber

Patent · Tue Jun 30 00:00:00 EDT 1987

OSTI ID:6122721

Kawamura, M; Taniguchi, M

An auxiliary combustion chamber is described for an internal combustion engine, the chamber comprises: (a) a chamber liner formed of a ceramic material that is an effective thermal insulator, the chamber liner having substantially hemispherical internal and external surfaces; (b) an outer metal member cast around the chamber liner, the outer member including a substantially hemispherical portion contacting the outer surface of the chamber liner and imparting a compressive stress to the chamber liner; the metal member further includes a substantially cylindrical portion contiguous with the open end of the hemispherical portion and extending beyond the chamber liner; the cylindrical portion has an inner surface of a predetermined inside diameter at ambient temperature; and (c) a substantially cup-shaped nozzle portion formed of a heat-resistant ceramic material and having an orifice disposed in the bottom to provide flow communication from a main combustion chamber to the interior of the auxiliary combustion chamber, the nozzle portion includes a substantially cylindrical outer surface having a diameter greater than predetermined inside diameter of cylindrical portion of the metal member; the nozzle portion is shrink-fit within the cylindrical portion of the outer metal member with the cylindrical outer surface of the ceramic nozzle contacting the inner surface of the cylindrical portion of the metal member. The bottom of the nozzle portion is disposed away from the hemispherical portion of the metal member.

• Assignee: NGK Spark Plug Co., Ltd., Aichi
• Patent Number(s): US 4676207
• OSTI ID: 6122721
• Resource Relation: Patent File Date: Filed date 5 Apr 1985
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
INTERNAL COMBUSTION ENGINES
COMBUSTION CHAMBERS
AMBIENT TEMPERATURE
AUXILIARY SYSTEMS
CERAMICS
COMPRESSION
LINERS
METALS
NOZZLES
STRESSES
THERMAL CONDUCTIVITY
THERMAL INSULATION
ELEMENTS
ENGINES
HEAT ENGINES
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
330100* - Internal Combustion Engines