Patent ID: 6213076
Filing Date: 2001-04-10
Classification: F01L

Abstract:
A cylinder head assembly for an internal combustion engine, comprising:a cylinder head body having a receiving bore which extends at an angle of 45.degree. to 90.degree. with respect to a vertical, and a feed bore for conducting a hydraulic fluid; anda tappet includinga cylindrical circular ring shaped section having a hollow cylindrical skirt which is secured in fixed rotative engagement in the receiving bore of the cylinder head and includes a through opening which is fluidly connected to the feed bore of the cylinder head body and disposed at a lowest point of the tappet, when viewed in direction of gravity;a circular section axially movable relative to and enclosed by the circular ring shaped section, each said sections having a bottom acted upon by cams of different lift;coupling means for interconnecting the sections;an insert received in the circular ring shaped section and demarcating with the circular ring shaped section a fluid reservoir which is fluidly connected with a piston space positioned anteriorly of the coupling means; andfluid passageway means for conducting a hydraulic fluid from the feed bore in the cylinder head body to the fluid reservoir, said fluid passageway means including a first channel fluidly connected to the through opening of the skirt and extending along an inner wall of the skirt to terminate in a port for communication with the fluid reservoir, said port being positioned in an area of a highest point of an edge of the insert, when viewed in direction of gravity.