影响汽车发动机动力因素的分析.doc

第 PAGE \* MERGEFORMAT 32 页 共 NUMPAGES \* MERGEFORMAT 33 页 影响汽车发动机动力因素的分析 摘要：发动机动力不足或动力性能下降，反映在车上就是加速性能、爬坡能力差。汽车启步困难，爬坡能力差；忽然加大油门时汽车反应缓慢，行驶中很难在规定的时间内达到最高车速，或完全达不到最高车速，这主要是汽车加速无力的故障。影响汽车动力和加速性能的主要原因有油路原因、电路原因、发动机缸压不足原因等等。 关键字：发动机 油路原因 电路原因 缸压不足 Abstract: Power of the engine or power performance degradation, reflected in the performance of the car is accelerating, hill climbing ability is poor. Auto start-step problems, poor climbing ability; suddenly stepped on the gas when the car slow to respond, moving within the prescribed time is difficult to achieve the highest speed, or will not achieve maximum speed, vehicle acceleration largely powerless failure. Vehicle power and acceleration of the main reasons are oil, circuit reasons, reasons of lack of cylinder pressure and so on. Keywords: engine oil because circuit because lack of cylinder pressure 目 录 摘要·····························································1 1 发动机的概述·················································2 2 发动机的总体构造·············································2 3 发动机的种类·················································6 3.1 按结构分类····················································6 3.2 按发动机布局分类··············································7 3.3 按燃料分类····················································8 4 发动机的工作原理··············································8 4.1 柴油发动机工作原理············································9 4.2汽油发动机工作原理········································10 4.2.1四行程汽油机的工作原理····································12 4.2.2多缸发动机的工作原理······································13 5 发动机的主要性能指标··········································13 5.1 发动机的最大功率···········································13 5.2 发动机的最大扭矩···········································15 5.3 发动机的最低燃油消耗量······································15 5.3.1燃油消耗量·················································15 5.3.2燃油消耗率·················································16 5.3.3燃油消耗量与燃油消耗率的关系·······························16 5.4 发动