，可不要求2500字，到2000字即可
Industry Standard Specification of Internal Combustion Engine
1.主缸内部
1. Internal of Main Cylinder
1.1缸壁厚度
The wall thickness of the cylinder shall not be less than 5mm.
1.2缸外表面
The external surface of the cylinder should be flat and smooth.
1.3冷却水道
The cooling passages of the cylinder shall be designed to ensure that the entire cylinder and piston are cooled uniformly.
1.4缸轴同步器
The synchronizer of the cylinder shaft shall be of high quality and reliable.
2.活塞
2. Piston
2.1活塞件内径
The inner diameter of the piston shall not be less than 80mm.
2.2活塞表面
The surface of the piston should be smooth and free from defects.
2.3活塞尖端
The tip of the piston shall be designed to ensure that the whole piston is uniformly heated.
3.燃烧室
3. Combustion Chamber
3.1科技面
The combustion chamber shall be designed based on the latest combustion technologies.
3.2结构形式
The structure of the combustion chamber shall be designed to optimize the combustion process.
3.3燃烧效率
The combustion efficiency of the combustion chamber shall not be less than 90%.
3.4燃气喷射
The fuel should be uniformly injected into the combustion chamber to ensure optimal combustion.
4.滑动轴承
4. Sliding Bearing
4.1耐磨性
The sliding bearing shall have a high wear resistance.
4.2运动灵敏度
The motion sensitivity of the sliding bearing shall be ensured by the design.
4.3润滑性
The lubrication of the sliding bearing shall be well designed.
4.4密封性
The sealing of the sliding bearing shall be designed to be airtight.
5.气门
5. Valve
5.1气门升降
The valve lift shall not be less than 6mm.
5.2气门宽度
The width of the valve shall not be less than 2mm.
5.3气门反动
The counteraction of the valve shall be designed to ensure its reliable operation.
5.4活塞杆设计
The design of the valve stem shall be optimized to reduce the noise caused by its operation.
