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:
Sep. 13, 2011
Filed:
Sep. 04, 2007
Akinori Maezuru, Wako, JP;
Shigekazu Tanaka, Wako, JP;
Taichi Yoshikawa, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A variable stroke characteristic engine is provided in which a piston () and a crankshaft () are linked to a control shaft () via a variable stroke link mechanism (LV), and the variable stroke link mechanism (LV) is operated by an actuator (AC) that drives the control shaft () to thus make the stroke travel of the piston () variable, wherein a housing (HU) of the hydraulic actuator (AC) for operating the variable stroke link mechanism (LV) is provided in a bearing member () of a lower block () supporting the crankshaft (), and the housing (HU) is thus made small, thereby suppressing any increase in the dimensions of the engine. Furthermore, a hydraulic switching valve unit () for controlling operation of the hydraulic actuator (AC) is directly mounted on the housing (HU), thereby enhancing the responsiveness of the hydraulic actuator (AC).