汽车专业英语（黄立新）第二部分5章

1、背景知识背景知识 生词生词Unit 5 Lubrication System译文及评析译文及评析 背景知识背景知识 润滑系统引指的是向润滑部位供给润滑剂的一系列的给油脂、排油脂及其附属装置的总称。润滑系统可分为五种，即循环润滑系统，集中润滑系统，喷雾润滑系统，浸油与飞溅润滑系统，油和脂的全损耗性润滑系统。生词生词perform vt.完成 shaft n.轴layer n.层 transfer vt.传递；传输agent n.介质 nozzle n.喷嘴spray v.喷射；喷 journal n. (机械学)轴颈load n.负载，负荷 cushion n.缓冲器；软垫particle n.

2、颗粒；质点 retain vt.保持filter n. 过滤器 mesh v. 啮合rotor n.转子 revolve v.旋转；使旋转outlet n.出口，排放孔 distributor n.分电器groove n.凹槽，槽 coolant n. 冷却液tube n.管；电子管 radiator n.散热器译文及评析译文及评析 The lubricating oil performs the following functions in an engine: The oil lubricates moving parts to minimize wear by sealing the c

3、learances between moving parts such as bearings, shafts. Thus, the parts move on layers of oil, and not in direct contact with each other, which reduces power loss in the engine.Lubricating：润滑油过了一会，小男孩不哭了，睁开眼睛，过了一会，小男孩不哭了，睁开眼睛，用询问的目光看着越南护士。用询问的目光看着越南护士。 润滑油在发动机中实现如下功能：润滑油密封运动部件如轴承、轴之间的空隙，在摩擦表面之间形成油膜

4、，实现液体摩擦，减少磨损。部件在油层中运动，彼此间接接触，从而减少了摩擦阻力，降低了发动机的功率损耗。译文及评析译文及评析 The oil obtains heat from the moving parts of the engine which is transferred into the cooler oil in the oil pan. Therefore, the oil performs the function of a cooling agent. Some engines have oil nozzles which spray oil at the underside

5、of the pistons, thereby removing heat from the pistons.Obtain : 油嘴过了一会，小男孩不哭了，睁开眼睛，过了一会，小男孩不哭了，睁开眼睛，用询问的目光看着越南护士。用询问的目光看着越南护士。 润滑油进入发动机后，吸收并带走发动机运动部件产生的热量，冷却后流入油底壳。因此，润滑油具有冷却剂的作用。部分发动机活塞采用飞溅润滑，在活塞下端喷撒润滑油，吸收活塞部分热量，防止活塞过热。译文及评析译文及评析 The oil fills the clearances between rotating journals and the bearin

6、gs. When heavy loads are abruptly placed on the bearings the oil acts as a cushioning agent, which reduces the wear on bearings.The oil creates a seal between the walls of the cylinder and the piston rings, thereby reducing exhaust gas blow by.掌握基本的名词词汇及上文内容掌握基本的名词词汇及上文内容过了一会，小男孩不哭了，睁开眼睛，过了一会，小男孩不哭了

7、，睁开眼睛，用询问的目光看着越南护士。用询问的目光看着越南护士。 润滑油填满旋转轴颈和轴承之间的空隙。当重载荷突然加载至轴承上，润滑油起着缓冲剂的作用，减少轴承磨损。润滑油在气缸壁和活塞环之间形成了一道密封层，阻止了废气的流入。译文及评析译文及评析 The oil performs the function of a cleaning agent by picking up dirt particles and taking them to oil pan. Larger particles are retained at the bottom while smaller particles

8、are filtered out by oil filters.掌握上文基本内容。掌握上文基本内容。过了一会，小男孩不哭了，睁开眼睛，过了一会，小男孩不哭了，睁开眼睛，用询问的目光看着越南护士。用询问的目光看着越南护士。 润滑油通过拾取脏颗粒物并将其带入油底壳，起着清洁作用。较大的颗粒物会保留在油底壳中，而较小颗粒被机油滤清器过滤掉。译文及评析译文及评析 Oil Pump: The gear-type oil pump has a pair of meshing gears. The spaces between the teeth are filled with oil when the g

9、ears unmesh. The oil pump obtains oil from the oil pan and sends oil through the oil filter to the oil galleries and main bearings. Some oil passes from the holes in the crankshaft to the rod bearings.Oil pump：喷油泵：喷油泵过了一会，小男孩不哭了，睁开眼睛，过了一会，小男孩不哭了，睁开眼睛，用询问的目光看着越南护士。用询问的目光看着越南护士。 喷油泵：齿轮式机油泵体内装有一对啮合齿轮。齿

10、轮未啮合时，齿轮腔内容积增大，产生一定真空，润滑油被吸入齿腔，填满齿间空隙。油泵从油底壳中吸入润滑油，经滤清器后，输送到各油道和主轴承中，部分润滑油经曲轴孔流入连杆轴承。译文及评析译文及评析 Main bearings and rod bearings are lubricated adequately to achieve their desired objectives. In the rotor type oil pump, the inner rotor is driven and drives the outer rotor. As the rotor revolves, the g

11、aps between the lobes are filled with oil. When the lobes of the inner rotor move into the gaps in the outer rotor, oil is forced out through the outlet of pump. An oil pump can also be driven by a camshaft gear that drives the ignition distributor or by the crankshaft.Bear: 轴承过了一会，小男孩不哭了，睁开眼睛，过了一会，

12、小男孩不哭了，睁开眼睛，用询问的目光看着越南护士。用询问的目光看着越南护士。 主轴承和连杆轴承被充分润滑，实现预期目标。在转子式机油泵中，内转子随机油泵传动轴转动，驱动外转子。转子在转动过程中，工作腔转过进油口吸入润滑油。当内外转子相互啮合时，润滑油经出油口被压出。油泵可以通过凸轮轴齿轮驱动点火分电器进行驱动，或者通过曲轴转动进行驱动。译文及评析译文及评析 Oil Pan: Oil also flows to the cylinder head through drilled passages that make up the oil gallery, lubricates camshaft

13、bearings and valves, and then returns to oil pan. Some engines have grooves or holes in connecting rods, which provide extra lubrication to pistons and walls of cylinders.Oil Pan：油底壳 过了一会，小男孩不哭了，睁开眼睛，过了一会，小男孩不哭了，睁开眼睛，用询问的目光看着越南护士。用询问的目光看着越南护士。 油底壳：润滑油经钻孔油道流向气缸盖，润滑凸轮轴轴承和阀门，然后回到油底壳。一些发动机的连杆表面存在细孔或凹槽，可

14、以贮存少量润滑油，为活塞和汽缸壁提供了额外的润滑。译文及评析译文及评析 Oil Cooler: Oil cooler prevents overheating of oil, by flow of engine coolant past tubes carrying hot oil. The coolant picks excess heat and carries it to the radiator.Oil Filter: The oil from oil pump flows through oil filter before reaching the engine bearings. The oil filter retains the dirt particles and allows only clean filtered oil to pass.Oil Cooler: