Title:
DOUBLE-LINK TYPE PISTON CRANK MECHANISM OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2020029821
Kind Code:
A
Abstract:
To form an oil passage on the inside of an upper link so that failure does not occur.SOLUTION: An upper link 4 comprises an oil supply passage 31 inside for guiding oil introduced from a pin boss part 26 side for a piston pin to an upper pin 5. The oil supply passage 31 includes: a first oil passage 32; a second oil passage 33; and a third oil passage 34. The one end of the first oil passage 32 is opened on the inner peripheral surface 26a of the pin boss part 26 for the piston pin and the other end of the first oil passage is connected to the second oil passage 33 formed on a pin boss part 27 for an upper pin. The center axis of the second oil passage 33 is curved in an arc shape along the circumferential direction of the pin boss part 27 for the upper pin. The third oil passage 34 is formed so that the one end thereof is connected to the second oil passage 33, and the other end thereof is opened at a position avoiding the top portion 38 and the bottom portion 39 of the inner peripheral surface 27a of the pin boss part 27 for the upper pin.SELECTED DRAWING: Figure 6
Inventors:
ICHIHARA HIROKI
ARINAGA TAKESHI
FUJITA HIDEHIRO
ARINAGA TAKESHI
FUJITA HIDEHIRO
Application Number:
JP2018155950A
Publication Date:
February 27, 2020
Filing Date:
August 23, 2018
Export Citation:
Assignee:
NISSAN MOTOR
International Classes:
F01M1/06; F02B75/04; F02B75/32; F16C7/02
Domestic Patent References:
| JP2017061859A | 2017-03-30 | |||
| JP2010116777A | 2010-05-27 | |||
| JPH03260414A | 1991-11-20 | |||
| JP2006077931A | 2006-03-23 | |||
| JP2015072037A | 2015-04-16 | |||
| JP2005023992A | 2005-01-27 | |||
| JP2010185329A | 2010-08-26 | |||
| JP2016191463A | 2016-11-10 |
Foreign References:
| US20130255620A1 | 2013-10-03 |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Tomioka Kiyoshi