介绍一种多层金属气缸盖衬垫设计实例。这种新型衬垫由3层金属薄层构成。1层带小凸纹的薄金属层作为中间层,用于气缸孔的燃气密封。在实际发动机试验中,使用在密封凸纹区涂覆橡胶的衬垫,观察在挡圈垫片上附加凸纹的影响。气缸孔部分衬垫各层间涂覆橡胶层的剥落显示出附加凸纹方向的差异。讨论认为,附加凸纹不仅对燃气压力可能有静态密封作用,并且在发动机运行条件下,能有效维持涂覆橡胶的弹性。表面涂层是新型衬垫设计中引入的另一个新设计特性。表面涂层是一种柔软的弹性树脂涂料,其作用是减小衬垫金属层上橡胶涂层压紧发动机配合面后的剥落。在热冲击试验中观察到,表面涂层可有效减少橡胶塌陷、屈服和涂层剥落等现象。论述了发动机配合面的粗糙度由具有吸收剂作用的表面涂层冷流特性填充。此外,还论述了表面涂层能够保护橡胶免受冷却液的负胀影响。 A multi-layer metal cylinder head gasket design example is introduced. The new liner consists of three layers of metal. 1 layer of low-profile thin metal layer as an intermediate layer for the cylinder bore gas seal. In actual engine tests, a rubberized liner was used on the seal relief area to observe the effect of the additional relief on the collar gasket. Exfoliation of the rubber layer between the layers of the cylinder bore section liner shows the difference in the direction of the additional relief. The discussion argues that additional relief not only has a static sealing effect on gas pressure but also maintains the elasticity of the coated rubber effectively under engine operating conditions. Surface coating is another new design feature introduced in the new liner design. The surface coating is a flexible, elastomeric resin coating that reduces the flaking of the rubberized coating on the gasket metal layer after it has compacted the engine mating surface. It has been observed in the thermal shock test that the surface coating can effectively reduce the phenomenon of rubber collapse, yielding and coating spalling. It is discussed that the roughness of the engine mating surface is filled by the cold flow characteristics of the surface coating with absorbent. In addition, it is also discussed that the surface coating protects the rubber from the negative expansion of the coolant.