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. 19, 2009
Filed:
Jul. 06, 2006
Noritaka Miyamoto, Toyota, JP;
Masaki Hirano, Toyota, JP;
Toshihiro Takami, Toyota, JP;
Kouhei Shibata, Toyota, JP;
Nobuyuki Yamashita, Shiojiri, JP;
Toshihiro Mihara, Matsumoto, JP;
Giichiro Saito, Yamagata, JP;
Masami Horigome, Yamagata, JP;
Takashi Sato, Yamagata, JP;
Noritaka Miyamoto, Toyota, JP;
Masaki Hirano, Toyota, JP;
Toshihiro Takami, Toyota, JP;
Kouhei Shibata, Toyota, JP;
Nobuyuki Yamashita, Shiojiri, JP;
Toshihiro Mihara, Matsumoto, JP;
Giichiro Saito, Yamagata, JP;
Masami Horigome, Yamagata, JP;
Takashi Sato, Yamagata, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
Abstract
A cylinder liner for an engine cylinder block. A roughening process is performed only on an upper region of the outer surface of the cylinder liner. This increases adhesiveness with a sprayed layer at the upper region compared to a lower region of the liner outer surface. Therefore, difference in thermal conductance is produced in the axial direction of the cylinder liner. This maintains the wall temperature of the cylinder bore in an appropriate temperature range. Even if adhesiveness at the lower region of the liner outer surface is low, bottleneck-shaped projections are distributed on the liner outer surface. Thus, the bonding strength between the cylinder liner and the sprayed layer and the cylinder liner and the cylinder block via the sprayed layer is sufficient. This maintains the roundness of the cylinder bore and prevents fuel efficiency from being lowered by exhaust gas loss and mechanical loss.