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:
Apr. 02, 2013
Filed:
Sep. 09, 2010
Myung Rae Cho, Incheon, KR;
Hong Wook Lee, Yongin, KR;
Taewon Park, Hwaseong-si, KR;
Woo Tae Kim, Suwon, KR;
Myung Sik Choi, Seoul, KR;
Eui Chul Choi, Seoul, KR;
Won Gyu Kim, Seoul, KR;
Myung Rae Cho, Incheon, KR;
Hong Wook Lee, Yongin, KR;
Taewon Park, Hwaseong-si, KR;
Woo Tae Kim, Suwon, KR;
Myung Sik Choi, Seoul, KR;
Eui Chul Choi, Seoul, KR;
Won Gyu Kim, Seoul, KR;
Hyundai Motor Company, Seoul, KR;
Abstract
An electro-hydraulic variable valve lift apparatus may include a valve unit housing of which a guide protrude portion is formed therein, a main piston which is slidably disposed in the valve unit housing and defines a valve adjusting oil chamber with the valve unit housing, a main spring which is disposed within the valve adjusting oil chamber and elastically supports the main piston on the guide protrude portion, a dependent piston which is slidably disposed within the valve unit housing, is guided along the guide protrude portion, reciprocates according to reciprocation of the main piston, and opens a valve, and a main oil supply portion which selectively supplies hydraulic pressure to the valve adjusting oil chamber.