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:
Oct. 11, 2011
Filed:
Dec. 17, 2008
Jea Woong Yi, Uiwang-si, KR;
Jea Woong Yi, Uiwang-si, KR;
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Abstract
An oil circuit for a continuous variable valve timing (CVVT) device includes a main oil passage from a cylinder block toward a cylinder head to feed oil from a main gallery to a cam shaft, and a control oil passage branching off from the main oil passage on a side of the cylinder block and formed so as to feed the oil from the main oil passage to the continuous variable valve timing devices via an intake-side oil control valve and an exhaust-side oil control valve. The oil is fed to the cam shaft, the intake-side CVVT device, the exhaust-side CVVT device and a timing chain tensioner at one time. Thereby, the hydraulic pressure the hydraulic pressure applied to two cam shafts can be equally maintained, and the tension of a belt or a chain can be simultaneously regulated so as to improve the driving force of a crank.