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:
Jan. 31, 2012
Filed:
May. 31, 2007
Hiroaki Mochida, Yokohama, JP;
Hiroaki Mochida, Yokohama, JP;
Nissan Motor Co., Ltd., Kanagawa, JP;
Abstract
A method of manufacturing a cylinder block for a multi-cylinder engine is disclosed herein. The cylinder block includes a crankcase and cylinder bores disposed therein separated by cylinder walls. The crankcase is adapted to receive a crankshaft and includes crank chambers disposed therein separated by partition walls. Each of the crank chambers of the crankcase corresponds to one of the cylinder bores of the cylinder block. The cylinder bore side of each partition wall has a honing runoff portion thinner in section than the crankshaft side thereof such that a step face results in the partition walls. Further, a runoff groove is formed in the partition walls of the crank chambers, and also a communication hole is formed at least partially within the runoff groove in at least one of the partition walls to enable communication between crank chambers.