Engine block crankshaft bearings

An internal combustion engine comprises an aluminum alloy engine block housing pistons in cylinders and having a lower face including an upper semi-circular bearing surface. A lower bearing support has a lower semi-circular bearing surface to complement the upper semi-circular bearing surface in the...

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Bibliographische Detailangaben
1. Verfasser:	TAPPEN GRANT K
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES BEARINGS BLASTING COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES ORMATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHERTHAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MECHANICAL ENGINEERING ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	An internal combustion engine comprises an aluminum alloy engine block housing pistons in cylinders and having a lower face including an upper semi-circular bearing surface. A lower bearing support has a lower semi-circular bearing surface to complement the upper semi-circular bearing surface in the engine block to define a crankshaft bore to rotatably support an iron alloy crankshaft. The lower bearing support is formed of a single aluminum-silicon alloy having a coefficient of thermal expansion comparable to the iron alloy crankshaft to promote a consistent clearance between the lower bearing support and the crankshaft. Such an aluminum-silicon alloy is comprised of approximately 33-35% by weight silicon and the balance is aluminum.