Two-stroke internal combustion engine
A two-stroke supercharged multi-cylinder internal combustion engine is described comprising in combination a cylinder block having cylinder bores formed therein. A cylinder head on an upper end of the cylindrical bores defines a main combustion chamber, a piston assembly in each of the cylinder bores and including a piston have a domed head and a connecting rod operatively connected to the piston for reciprocating same between top dead center and bottom dead center. The piston includes means to reduce and control the escape of lubricating oil therepast. The means includes the piston assembly having a piston skirt extending from the head, a pair of diametrically opposed wrist pin bosses in the skirt below the domed head, a wrist pin mounted within the bosses with a retainer ring installed in an annular groove formed in an outermost edge portion of each of the bosses adjacent outer ends of the wrist pin for restricting endwise movement of the wrist pin. The wrist pin operatively connects the connecting rod to the piston, sealing ''O'' rings having high temperature resistance properties installed in an annular groove formed in each of the bosses of the piston adjacent to each end portion of the wrist pin after assembly to prevent the escape and discharge of lubricating oil therepast, at least two compression piston rings situated in spaced and parallel grooves in the head of the piston above the wrist pin bosses and at least one oil scraper ring mounted within an annular groove around the skirt.
- Assignee:
- NOV; EDB-86-118182; NOV-85-012917
- Patent Number(s):
- US 4576126
- OSTI ID:
- 5758371
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330100* -- Internal Combustion Engines
COMBUSTION CHAMBERS
COMPRESSION
COMPRESSORS
CYLINDERS
DESIGN
ENGINES
EXHAUST SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
LUBRICANTS
LUBRICATING OILS
MACHINE PARTS
MOTION
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PISTONS
PUMPS
ROTATION
SHAFTS
SUPERCHARGERS