8．缸盖(如图8所示) 做了与增压发动机相适应的改动: ●充钠的排气门●进、排气门与阀座接触处外包特殊材料●通过减少凸轮和滚子的支撑宽度而优化的滚子摇臂机构●较高弹力的气门弹簧(进、排气门的弹簧弹力相同) 进气道几何尺寸也做了相应的改动,因此进气涡流效果、抗爆性和运转平稳性都得到改善。 8. The cylinder heads (shown in Figure 8) make the appropriate changes to the supercharged engine: • Sodium-filled exhaust valves • Special materials for the intake and exhaust valves in contact with the valve seat • Reduced support of the cam and roller Width and optimized roller rocker arm mechanism ● higher elasticity of the valve spring (into the exhaust valve spring the same elastic) intake geometry has also been made accordingly changes, so intake vortex effect, antiknock and run Smoothness has been improved.