Valve operating system in internal combustion engine

摘要

A valve operating system in an internal combustion engine which provides a stable seating force for an engine valve (V) and includes an armature (12) operatively connected to a stem (8) of the engine valve that is capable of being seated on a valve seat member (6) provided to a cylinder head, valve-opening (13) and valve-closing (14) electromagnets for exhibiting electromagnetic forces for attracting the armature to open and close the engine valve, respectively, and valve-opening (15) and valve-closing (16) resilient means for exhibiting resilient forces for biasing the engine valve in opening and closing directions, respectively, and for retaining the armature in a predetermined neutral position by cooperation with each other during deenergization of both the valve-opening and valve-closing electromagnets. When the engine valve is closed by energizing the valve-closing electromagnet and is seated on the valve seat member, only the resilient force of the valve-closing resilient means is applied to the engine valve V because the valve-closing electromagnet attracts the armature and compresses the valve-opening resilient means. <IMAGE>