一、工作气体向气缸壁的散热发动机工作区域壁面的允许极限温度取决于缸壁材料的机械强度、保证摩擦面适当的润滑、气缸充气系数、活塞组的磨擦损失,而且汽化器式发动机还取决于爆震情况。工作气体平均温度和气缸工作区域壁面温度之差是工作气体向缸壁散热,然后向冷却介质散热的先决条件。 First, the working gas to the cylinder wall cooling engine work area wall limit temperature limit depends on the mechanical strength of the cylinder wall material to ensure proper lubrication of the friction surface, the cylinder air-cushion coefficient, the friction loss of the piston group, and the carburetor engine also depends on Knocking situation. The difference between the average working gas temperature and the wall temperature of the working area of ​​the cylinder is a precondition for the working gas to dissipate heat to the cylinder wall and then to the cooling medium.