INTAKE VALVE

摘要

PURPOSE: An intake valve is provided to prevent the carbon deposits of the intake valve applied to a gasoline direction injection (GDI) engine by maintaining the temperature of a neck part for connecting a valve head and a valve stem at 200 deg. or less. CONSTITUTION: An intake valve comprises a valve head (3) and a void (4). The valve head is extended from a neck part (2) to open and close an intake passage connected to a combustion chamber. The neck part is formed in one end of a valve stem (1). The void makes an internal space of the valve head in a vacuum state so that heat transferred from the flames of the combustion chamber cannot be transferred to the neck part. The void is concentrically formed with the neck part at the center of the neck part.