Multi-cylinder engine

Details Multi-cylinder engine Multi-cylinder engine

2006-07-18

2006-07-18

Yuen, Henry C. (Department: 3747)

Internal-combustion engines

Lubricators

Crankcase, pressure control

C123S041380

Reexamination Certificate

active

07077096

ABSTRACT:
In a multi-cylinder engine, a decrease of the load capacity of a main metal bearing between a bearing portion of a crankcase and a crank journal is prevented to achieve a reduction in the scale and a reduction in the weight of the engine while lubricating oil is supplied between a major end portion of a connecting rod and a crankpin. A pair of outermost crank journals are disposed most outwardly along an axial line of a crankshaft from among a plurality of crank journals have a length in the axial direction set greater than the length of the remaining crank journals in the axial direction. Crankpin oil paths extending from at least one of the two outermost crank journals to the crankpins are provided in the crankshaft while an oil supply source is connected to the crankpin oil paths at least at one of the outermost crank journals.

REFERENCES:
patent: 1329038 (1920-01-01), Curtiss
patent: 6536399 (2003-03-01), Matsuda et al.
patent: 2002-213302 (2002-07-01), None

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