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Title:
LINK GEOMETRY OF MULTI-LINK ENGINE
Document Type and Number:
Japanese Patent JP2012092843
Kind Code:
A
Abstract:

To provide a link geometry of a multi-link engine which does not cause deformation of a cylinder liner even if the rigidity of a cylinder liner becomes weak due to formation of a defect part in the lower end of the cylinder liner.

The link geometry of the multi-link engine includes: an upper link 11 connected to a piston 32; a lower link 12 which is fitted to a crank pin 33b of a crank shaft 33 freely rotatably and is connected to the upper link 11; and a control link 13 which is connected to the lower link 12 and rocks around a rocking center shaft 24. The crank pin 33b is arranged on a line connecting an upper pin 22 to a control pin 23, and an angle formed by a traverse axis passing the axis center of a crank journal 33a and crossing at a right angle to the cylinder axial line and a line connecting the control pin 23 to the upper pin 22 is nearly the same in the top dead center and in the bottom dead center of the piston.


Inventors:
TAKAHASHI NAOKI
TOMITA MASAYUKI
USHIJIMA KENJI
HIRATANI KOJI
TSUCHIDA HIROBUMI
AOYAMA SHUNICHI
Application Number:
JP2011274276A
Publication Date:
May 17, 2012
Filing Date:
December 15, 2011
Export Citation:
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Assignee:
NISSAN MOTOR
International Classes:
F02B75/32; F02B75/04; F02D15/02; F16C7/02; F16H21/34
Domestic Patent References:
JP2003013764A2003-01-15
JP2003278567A2003-10-02
JP2006144615A2006-06-08
JP2006052667A2006-02-23
JP2006200375A2006-08-03
JPS57186638U1982-11-26
JPS5932147U1984-02-28
Attorney, Agent or Firm:
Masaki Goto
Masahiro Fujii
Masaaki Iida
Yasunari Mita