The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2018
Filed:
Aug. 21, 2014
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Makoto Kobayashi, Kanagawa, JP;
Shinya Oohira, Kanagawa, JP;
Hiroaki Mochida, Kanagawa, JP;
Kensuke Ikehara, Kanagawa, JP;
Wataru Arai, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A crankshaft of an in-line, four-cylinder internal combustion engine has five journal portions. The journal portions are each supported by a main bearing unit. Each of the main bearing units includes a cylinder block side bearing part and a bearing cap. The No., No., No.and No.main bearing units employ an iron-based bearing cap, and the No.main bearing unit at the center employs a bearing cap made of an aluminum alloy having a relatively high thermal expansion coefficient. At high temperatures, the bearing clearance of the No.main bearing unit is configured to expand so as to reduce bearing load.