CRANKSHAFT HAVING OPTIMIZED CRANKPIN LUBRICATION, AND RELATED ENGINE AND METHOD FOR PRODUCING THE LUBRICATION SYSTEM

摘要

The invention relates to a crankshaft (1) comprising at least: a journal (2); a first crankpin (31); a second crankpin (32); a first arm (41) connecting the first crankpin (31) to the journal (2); a second arm (42) connecting the second crankpin (32) to the journal (2); a first pipe (51) extending away from the first crank pin toward the journal (2) and leading onto the surface of the first crankpin (31) on the transverse median plane (PM1) thereof, and substantially passing to the center of the median plane of the second arm; and a second (52) extending away from the second crankpin toward the journal (2) and leading onto the surface of the second crankpin (32) on the transverse median plane thereof (PM2), and substantially passing to the center of the median plane of the second arm, characterized in that the shape of the crankshaft (1) is such that it cannot also comprise a diametric pipe within the transverse median plane of the journal (PT) fluidly adjoining the first pipe (51) and the second pipe (52), and the crankshaft comprises a third non-diametric pipe (9) within the transverse median plan of the journal (PT) fluidly connecting the first pipe (51) and the second pipe (52). The invention also relates to an engine comprising such a crankshaft and to the related method for producing the lubrication system.