曲轴毕业设计英文文献及参考书摘要.doc

PAGE 目 录 TOC \o "1-3" \u 1 英文文献翻译 1 1.1 The structure of the engine 1 1.2 发动机的结构 9 2 专业阅读书目 15 2.1 金属切削与机床 15 2.2 数控机床刀具及其应用 15 2.3 数控机床及应用 16 2.4 机床结构件几何优化设计的研究 16 2.5 耐磨损及腐蚀的铸态28Cr白口铸铁 16 2.6 应变疲劳可靠性分析的现状及展望 17 2.7 仿人机器人发展及其技术探索 17 2.8 机械式拖拉机导向探测装置 17 2.9 RGRR-Ι构造混联6R机器人 17 2.10 大学生机械设计竞赛指导 18 PAGE 1 1 英文文献翻译 1.1 The structure of the engine Before you start work, make sure you have a quality onlinemanual from ALLDATA.? If you are leaving your engine repair to your mechanic, make sure you read our section on auto warranties on some tips on how to get a good extended warranty to protect yourself from unexpected repair bills. The engine is the heart of your car, but instead of pumping blood, the engine pumps air and fuel. The engines main function is to convert air and fuel into rotary motion so it can drive the wheels of the car. How does it do that ? Pistons: Most common engines have 4, 6, or 8 pistons which move up and down in the cylinders. On the upper side of the piston is what is called the combustion chamber where the fuel and air mix before ignited. On the other side is the crankcase which is full of oil. Pistons have rings which serve to keep the oil out of the combustion chamber and the fuel and air out of the oil. Pistons are made from lightweight aluminum alloy and are designed to float in the cylinder without contacting the cylinder walls. They float on a thin layer of oil which is below the rings. If the rings fail, oil can leak into the combustion chamber and you will see grey smoke coming from the exhaust. If the rings wear or you lose oil to the engine, the pistons can score the cylinder walls damaging the engine and requiring a rebuild. Crankshaft: The crankshaft is connected to the pistons via a connecting rod. As the piston moves up and down in the cylinder it rotates the crankshaft and converts the straight line motion into rotary motion. Valvetrain: The valvetrain consists of valves, rocker arms, pushrods, lifters, and the ca