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    • 71. 发明授权
    • Lubricating structure of connecting rod and crankshaft
    • 连杆和曲轴的润滑结构
    • US5730097A
    • 1998-03-24
    • US562960
    • 1995-11-27
    • Shunichi Aoyama
    • Shunichi Aoyama
    • F01M1/06F16C3/14F16C9/04F16C33/12F01M1/08
    • F16C3/14F16C33/121F16C33/124F16C9/04
    • A bearing supporting a crankshaft provided in a connecting rod comprises an overlay in contact with a throw, a metal layer on the outside of the overlay and a back metal on the outside of the metal layer. The hardness of the metal layer is lower than that of the back metal, and the thermal conductivity of the overlay is higher than that of the throw. The metal layer having a lower hardness than the back metal improves the fit of the bearing with the throw, and sharp increase of frictional losses and rise of lubricating oil temperature at high engine rotation speeds are thereby prevented. The overlay having a high thermal conductivity absorbs heat from the minimum thickness oil film formed between the inner surface region of the throw and the bearing, and after the bearing has passed through the minimum thickness oil film, the absorbed heat is again discharged to the lubricating oil. In this way, temperature rise of the throw in the vicinity of the minimum thickness oil film is suppressed, decreased viscosity of the lubricating oil due to temperature rise is prevented, and the thickness of the minimum thickness oil film is maintained.
    • 支撑设置在连杆中的曲轴的轴承包括与抛物线接触的覆盖层,覆盖层的外侧上的金属层和金属层的外侧上的背面金属。 金属层的硬度低于后金属,其覆盖层的导热系数高于抛物线。 硬度低于背面金属的金属层,能够提高轴承的抛出配合性,从而防止摩擦损失急剧增大,发动机转速高时的润滑油温度上升。 具有高导热性的覆盖层吸收从投掷内表面区域和轴承之间形成的最小厚度油膜的热量,并且在轴承通过最小厚度的油膜之后,吸收的热量再次被排出到润滑剂 油。 以这种方式,可以抑制最小厚度油膜附近的投掷温度上升,防止由温度升高导致的润滑油粘度降低,并保持最小厚度油膜的厚度。