【摘要】 通过在 CA488系列发动机上采用长连杆短活塞结构以及缸体平台网纹珩磨工艺等改进措施，以减轻运动件的质量和提高润滑水平，来达到降低发动机各部分零件的负荷和磨损，并最终实现提高整机性能的目的，通过动力学计算及台架、道路试验的结果分析验证了改进设计的优越性。更多还原

【Abstract】 The goal of reducing the load and wear of each part in engine and improving the performance of whole engine can be realized through some improving measures such as a structure with long connecting rod and short piston and the platform cross hatch honing technology for cylinder block to reduce the mass of moving parts and improve the lubrication level.The advantages of improving design are verified and proved through kinetic computing and analysis of results from road tests and test bench.更多还原