초록 ▼

An electromagnetically operated valve driving system for driving an intake or exhaust valve of an engine comprises an opening solenoid, a closing solenoid, and a control apparatus for energizing or deenergizing these opening and closing solenoids. Springs are provided in order to balance a valve bod

An electromagnetically operated valve driving system for driving an intake or exhaust valve of an engine comprises an opening solenoid, a closing solenoid, and a control apparatus for energizing or deenergizing these opening and closing solenoids. Springs are provided in order to balance a valve body on a specified position between the fully open and fully closed positions. Further, when the intake or exhaust valve is closed, the closing solenoid is deenergized for a very short time immediately before the intake or exhaust valve is fully closed so as to reduce a traveling speed of the valve body when said valve body is seated. Also, when the intake or exhaust valve is opened, the opening solenoid is deenergized for a very short time immediately before the intake or exhaust valve is fully opened so as to reduce a traveling speed of the valve body when the valve body is fully opened.

대표청구항 ▼

[ What is claimed is:] [1.] An electromagnetically operated valve driving system of an engine having a combustion chamber, an intake or exhaust valve including a valve body for opening and closing said combustion chamber, a valve stem for supporting said valve body, an armature connected with said v

[ What is claimed is:] [1.] An electromagnetically operated valve driving system of an engine having a combustion chamber, an intake or exhaust valve including a valve body for opening and closing said combustion chamber, a valve stem for supporting said valve body, an armature connected with said valve stem, a first solenoid for attracting said armature and for driving said valve body so as to open said combustion chamber and a second solenoid for attracting said armature and for driving said valve body so as to close said combustion chamber, and a control apparatus for energizing or deenergizing said first and second solenoids, comprising:at least one spring for balancing said valve body on a specified position between the fully open and fully closed positions of said valve body and for exerting a restoring force of said valve body; andvalve closing control means for at least once stopping energizing said second solenoid immediately before said intake or exhaust valve is fully closed, so as to reduce a traveling speed of said valve body when said valve body is seated, when said intake or exhaust valve is closed.