Patent ID: 8925582
Filing Date: 2015-01-06
Classification: F01L,F16K,Y10T

Abstract:
1. An oil control valve for a variable valve lift system, the oil control valve comprising: a valve housing a valve cap an upper seat a lower seat a ball valve a check valve a pilot a pressing spring a valve case in which the lower portion of the valve housing is inserted; a plunger a bobbin a yoke located between the plunger and the bobbin, wherein the check valve is configured to be elastically pushed upward by the pressing spring to seal the second through-hole to maintain residual pressure in a second chamber formed by the upper seat and the lower seat, wherein the upper seat has a greater diameter than that of the lower seat, and wherein an interior wall of the valve housing comprises a first ledge and a second ledge, the first ledge configured to receive the lower seat placed thereon, the second ledge configured to receive the upper seat placed thereon.