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Title:
CRANK SHAFT BEARING STRUCTURE OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2016/027337
Kind Code:
A1
Abstract:
A crank shaft (1) of an in-line four-cylinder internal combustion engine has five journal sections (2), and the journal sections (2) are each supported by No.1 to No.5 main bearing units (6). Each of the main bearing units (6) is configured from a cylinder block side bearing unit (7) and a bearing cap (8). The No.1, No.2, No.4, and No.5 main bearing units (6) employ an iron-based bearing cap (8A), and the No.3 main bearing unit (6) at the center employs a bearing cap (8B) made of an aluminum alloy having a relatively high thermal expansion coefficient. At high temperatures, the bearing clearance of the No.3 main bearing unit (6) is expanded so as to reduce bearing load.

Inventors:
KOBAYASHI MAKOTO (JP)
OOHIRA SHINYA (JP)
MOCHIDA HIROAKI (JP)
IKEHARA KENSUKE (JP)
ARAI WATARU (JP)
Application Number:
JP2014/071837
Publication Date:
February 25, 2016
Filing Date:
August 21, 2014
Export Citation:
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Assignee:
NISSAN MOTOR (JP)
International Classes:
F16C9/02
Foreign References:
JPH07103071A1995-04-18
JPH0727126A1995-01-27
JP2004108418A2004-04-08
JPH06330932A1994-11-29
JPH08284748A1996-10-29
Other References:
See also references of EP 3184831A4
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
Hiromichi Kobayashi (JP)
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