To achieve a bearing structure for a control pin capable of appropriately corresponding to a load condition of a load.
This double link type variable compression ratio internal combustion engine includes: an upper link 3 connected to a piston 2; a lower link 7 connected to a crank shaft 9 through a crank pin 8; an upper pin 5 connecting the upper link 4 and the lower link 7 to each other; and a control link 10 connected to the lower link 7 through the control pin 11. The control link 10 is formed with a bearing hole 13 supporting the control pin 11 as a sliding bearing. Concentration of compression loads inside the bearing hole 13 is prevented by reducing the curvature of the bearing hole 13 at the load center of a tensile load influencing the bearing hole 13 by the control pin 11 to a value smaller than the curvature of other parts of the bearing hole, and a clearance for compensating a close-in is secured between the load center of the close-in pressure and the control pin 11.
COPYRIGHT: (C)2010,JPO&INPIT
KOBAYASHI MAKOTO
MIZUNO HIDEAKI
USHIJIMA KENJI
| JP2002285877A | 2002-10-03 | |||
| JPH02119517U | 1990-09-26 | |||
| JP2008095858A | 2008-04-24 | |||
| JP2006258194A | 2006-09-28 | |||
| JP2004116434A | 2004-04-15 | |||
| JP2009041519A | 2009-02-26 | |||
| JPH09303372A | 1997-11-25 | |||
| JPH10325410A | 1998-12-08 | |||
| JPH02119517U | 1990-09-26 |
| US6874229B2 | 2005-04-05 |
Masahiro Fujii
Yasunari Mita
Masaaki Iida
Next Patent: WARMING-UP CONTROLLER FOR INTERNAL COMBUSTION ENGINE