Valve operating system for internal combustion engine

A valve operating system for an internal combustion engine, comprising:

• first and second intake valves capable of opening and closing first and second intake valve bores, respectively, which are provided in a cylinder head to face a combustion chamber;
• a first electromagnetic driving means for electromagnetically driving said first intake valve;
• a second electromagnetic driving means for electromagnetically driving said second intake valve with a larger opening and closing stroke than that of said first intake valve;
• and
• a control means for controlling the operation of said first and second electromagnetic driving means in a manner that when the engine is in predetermined operational states including an engine starting state, said first intake valve is opened and closed in a condition in which said second intake valve has been closed and stopped, wherein said second electromagnetic driving means is provided with an equilibrium position changing means for selectively changing an equilibrium neutral position of said second intake valve.