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:
Mar. 29, 2016
Filed:
Jul. 22, 2014
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Chung Han Oh, Seongnam-si, KR;
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Abstract
An engine having a variable valve timing device may include a camshaft having a cam that lifts a valve, a valve body with one side fixed with the camshaft and the other side fixed with a fixed housing, variable wings protruding on an outer circumferential surface of the fixed housing, a sprocket housing forming a delay chamber and an advance chamber with the variable wings and having a sprocket on an outer circumferential surface, a control spool disposed coaxially with the camshaft and inserted in the valve body to selectively supply hydraulic pressure from an outside to the delay chamber or the advance chamber, and an actuator fastened to an outer end of the control spool, with a side fixed to a side of the engine, and advancing or delaying the sprocket housing with respect to the valve body by adjusting the hydraulic pressure supplied to the advance chamber or the delay chamber through the control spool by pulling or pushing the control spool.