Patent ID: 7121243
Filing Date: 2006-10-17
Classification: F01L,F02F,Y10T

Abstract:
1. A valve case that permits an oil control valve to be attached, the oil control valve having ports and controlling supply and drainage of hydraulic pressure to and from a variable valve actuation mechanism of an internal combustion engine, and the valve case is attached to a cylinder head cover main body formed of resin, the valve case comprising: an attaching portion formed of resin, the attaching portion is a portion of the valve case to which the oil control valve is to be attached; a sleeve embedded in the attaching portion, the sleeve having an interior space that permits the oil control valve to be accommodated therein and oil holes, wherein each oil hole is selectively connected to one of the ports of the oil control valve accommodated in the interior space of the sleeve, and the sleeve being formed of material having higher rigidity than the resin forming the attaching portion; an oil passage coupling portion formed of resin, the oil passage coupling portion having intermediate oil passages, the intermediate oil passages each connect one of the oil holes of the sleeve to a corresponding one of cam cap oil passages formed in a cam cap of the internal combustion engine to selectively supply and drain hydraulic pressure to and from the variable valve actuation mechanism; and a joint portion formed of resin, the joint portion being located at the outer circumference of a portion of the valve case between the attaching portion and the oil passage coupling portion or at the outer circumference of the oil passage coupling portion, and the joint portion is joined to the cover main body so that the valve case is attached to the cover main body.