BEARING STRUCTURE

• Main Authors: HOSHIKAWA, Hiroaki, OOKUMA, Satoru
• Format: Patent
• Language: English; French; German
• Published: 21.06.2017
• Subjects: BEARINGS; BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CRANKCASE VENTILATING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINE PLANTS IN GENERAL; 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; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; LUBRICATING INTERNAL COMBUSTION ENGINES; LUBRICATING OF MACHINES OR ENGINES IN GENERAL; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; STEAM ENGINES; THERMAL INSULATION IN GENERAL; WEAPONS

A main bearing metal (41) has a main bearing metal planar portion (42), a main bearing metal oil groove portion (44) in which a main-bearing-metal-side oil groove (43) extending in a circumferential direction is formed along the entirety of an inner peripheral surface, a first oil hole (48), one end thereof opening at the main-bearing-metal-side oil groove (43) and the other end thereof communicating with the lower end of an in-block oil passage (27) that extends from the oil gallery of a cylinder block to a crankshaft bearing part (12), and a second oil hole (49), one end thereof opening at the main-bearing-metal-side oil groove (43) and the other end thereof communicating with the upper end of an in-cap oil passage (28) that extends from the crankshaft bearing part (12) to a control shaft bearing part (17).