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. 10, 2013
Filed:
Nov. 29, 2010
Joohang Lee, Yongin-si, KR;
Hyukjun Lee, Yongin-si, KR;
Jongsool Park, Hwaseong-si, KR;
Hyunjun Son, Hwaseong-si, KR;
Joohang Lee, Yongin-si, KR;
Hyukjun Lee, Yongin-si, KR;
Jongsool Park, Hwaseong-si, KR;
Hyunjun Son, Hwaseong-si, KR;
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Abstract
An auto transmission hydraulic control apparatus may include six friction elements that of which two friction elements operate to achieve a corresponding to each stage by hydraulic pressure, five direct-controlled solenoid valves that individually and directly control hydraulic pressure to four friction elements and equally and directly control hydraulic pressure to the other two friction elements, an on-off solenoid valve converting output state and non-output state of hydraulic pressure, a switch valve in which one side of a valve spool is supplied by a spring to selectively supply hydraulic pressure from one of the direct-controlled solenoid valves, equally and directly controlling the hydraulic pressure supplied to the two friction element, in accordance with whether hydraulic pressure from on-off solenoid valve is applied to the other side thereof, and four fail-safe valves disposed between the direct-controlled solenoid valves and the friction elements to structurally limit available arrangements of the friction elements.