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1. (WO2017037935) LUBRICATION STRUCTURE AND LUBRICATION METHOD FOR UPPER PIN IN PISTON CRANK MECHANISM OF INTERNAL COMBUSTION ENGINE

Pub. No.:    WO/2017/037935    International Application No.:    PCT/JP2015/075169
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Sep 05 01:59:59 CEST 2015
IPC: F02B 75/32
Applicants: NISSAN MOTOR CO., LTD.
日産自動車株式会社
Inventors: WATANABE, Daisuke
渡邊 大介
NAKAJIMA, Shigeru
中島 茂
WAKI, Kazuto
脇 和人
KOBAYASHI, Yoshihiro
小林 義洋
Title: LUBRICATION STRUCTURE AND LUBRICATION METHOD FOR UPPER PIN IN PISTON CRANK MECHANISM OF INTERNAL COMBUSTION ENGINE
Abstract:
This lubrication mechanism is applied to a double link type piston crank mechanism having an upper link (3), a lower link (6), and a control link (7). Lubricating oil is supplied through an oil supply hole (19) to an oil reservoir (21) formed by a plate-shaped member (22) between a pair of pin bosses for an upper pin. The lubricating oil inside the oil reservoir (21) is supplied to the upper pin (4) by reciprocating rotary motion of an upper link-side pin boss section (25) provided with an oil groove (29) on an end surface.