VALVE SYSTEM FOR INTERNAL COMBUSTION ENGINE

摘要

THERE IS PROVIDED A VALVE SYSTEM FOR AN INTERNAL COMBUSTION ENGINE, IN WHICH A ROCKER SHAFT REQUIRED TO HAVE A HIGHER STIFFNESS HAS A LARGER DIAMETER. A ROCKER SHAFT (2) ON AN INTAKE SIDE IS FORMED TO HAVE A (E.G. ABOUT 10) LARGER DIAMETER (D1); THAN THAT OF A ROCKER SHAFT (3) ON AN EXHAUST SIDE, AND THEREFORE, IT IS POSSIBLE TO ENSURE SUCH STIFFNESS AS TO COMPENSATE FOR AN EXCESS IN WEIGHT AND TO IMPOVE VALVE OPERATING CHARACTERISTICS OF A VALVE SYSTEM.