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:
Jun. 27, 2006
Filed:
Jun. 07, 2002
Makoto Hirano, Wako, JP;
Makoto Hirano, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A compression ratio changing device in an internal combustion engine includes a piston inner element, a piston outer element slidably fitted over an outer periphery of the piston inner element for sliding movement only in an axial direction and capable of being moved between a lower-compression ratio position (L) and a higher-compression ratio position (H), a bulking member capable of being turned about axes of the piston inner and outer elements between a non-bulking position (A) and a bulking position (B), and an actuator connected to the bulking member for turning the bulking member to the non-bulking position (A) and the bulking position (B). The bulking member permits movement of the piston outer element to the lower-compression ratio position (L) when it is in the non-bulking position (A), and retains the piston outer element in the higher-compression ratio position (H), when it is turned to the bulking position (B).