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1、UNIT 2 ENGINE MECHANICAL TEXT A Piston Connecting Rods and Crankshaft Piston Assembly Piston Piston Rings,Piston Pin Connecting Rod Crankshaft Flywheel,New Words groove gru:v n. 凹槽 assembly E5sembli n. 部件，组件，集合，装配 brunt brQnt n. 冲击，冲势 crown kraun n. 王冠，花冠，顶 concave 5kCn5keiv adj. 凹的，凹入的；n. 凹，凹面 dome
2、d dEumd adj. 有穹顶的，半球形的 recess ri5ses vt. 使凹进 circular 5sE:kjulE adj. 圆形的，循环的 chrome krEum n. 铬，铬合金 wear wiE vt. 穿，戴；v. 磨损，用旧 resistant ri5zistEnt adj. 抵抗的，有抵抗力的 untwist 5Qn5twist v. 拆开，解开 tightly 5taitli adv. 紧紧地，坚固地,firmly 5fE:mli adv. 坚定地，稳固地 transmit trAnz5mit vt. 传输，传达，传播 bush buF n. 衬套 bronze b
3、rCnz n. 青铜；adj. 青铜色的 journal 5dVE:nl n. 定期刊物，杂志，轴颈，枢轴 tin tin n. 锡；adj. 锡制的 shell Fel n. 壳，外形 split split n. 裂口，裂痕；v.（使）裂开，分裂 withdraw wiT5drC: vt. 收回，撤消；v. 撤退 forge fC:dV v. 铸造，伪造 conjunction kEn5dVQNkFEn n. 联合，关联，连接词 reciprocating ri5siprEkeitiN adj. 往复的，来回的，交替的，摆动的 carbon 5kB:bEn n. 碳 proportion
4、prE5pC:FEn n. 比例，部分,nickel 5nikl n. 镍 circumference sE5kQmfErEns n. 圆周，周围,Phrases and Expressions piston ring 活塞环 fit into 适合 piston pin 活塞销 pin boss 销孔 ring groove 环槽 ring land 环岸 cylinder wall 气缸壁 compression ring 压缩环 cylinder bore 气缸，缸径 oil ring 油环 high-strength steel 高强度钢 main bearing 主轴承 alloy
5、steel 合金钢,in conjunction with 与协力，与联合 align with 与结盟 timing gear 正时齿轮 water pump 水泵 as well as 也，又 ring gear 齿圈,TEXT B Valve System Valve Timing Inlet Valve Timing Exhaust Valve Timing Valve Overlap Valve Train Overhead Camshaft Valve Train Push-rod Valve Train Valve Clearance Camshaft Drive Mechani
6、sm Gear Drive Chain Drive Belt Drive,New Words lap lAp vi. 重叠，围住；vt. 包围，使重叠 turbo 5tE:bEu n. 涡轮，增压涡轮 blow blEu v. 风吹，吹气于 coordinate kEu5C:dinit vt. 调整，整理 respectively ri5spektivli adv. 分别地，各个地 coordination kEu7C:di5neiFEn n. 同等，调和 typically 5tipikEli adv. 代表性地，作为特色地 stem stem n. 茎，干 seesaw 5si:sC: n
7、. 秋千 consequently 5kRnsikwEntli adv. 从而，因此 liable 5laiEbl adj. 易的，有倾向的，很有可能的 likelihood 5laiklihud n. 可能，可能性,clearance 5kliErEns n. 清除 sufficiently sE5fiFEntli adv. 十分地，充分地 correspond kCris5pCnd vi. 符合，协调，通信，相当，相应 accomplished E5kCmpliFt adj. 完成的，熟练的，多才多艺的 chain tFein n. 链（条） rocker 5rCkE n. 摇杆 pivo
8、t 5pivEt n. 枢轴；vi.在枢轴上转动 metallic mi 5tAlik adj. 金属（性）的 synthetic sin5Wetic adj. 合成的，人造的，综合的 fiberglass 5faibElB:s n. 玻璃纤维，玻璃丝 strand strAnd n. 线，绳,Phrases and Expressions valve timing 气门正时 inlet valve 进气门 exhaust valve 排气门 be known as 被认为是 valve overlap 气门重叠 lap over 重叠 valve mechanism 气门机构 valve s
9、eat 气门座 overhead valve 顶置气门 dual overhead camshaft 双顶置凸轮轴 cam follower 挺柱 push rod 推杆,rocker arm 摇臂 cog-type belt 齿型带 synthetic rubber 合成橡胶,EXERCISES 1. Answer the following questions according to the text (1) What are the most pistons made from? (2) How does the piston transfer to the crankshaft? (
10、3) What is the piston assembly made up of? (4) What is the shape of piston crown? (5) How many piston rings does each piston have in modern engine? (6) What is the function of piston rings? (7) Why is the split of the big end sometimes at an angle? (8) What is the crankshaft usually made from? (9) W
11、here is the flywheel mounted? (10) What is the function of flywheel?,2. Translate the following into Chinese (1) be made from (2) fit into (3) depend on (4) prevent from (5) be made of (6) such as (7) the same as (8) convert to (9) at the rear end of (10) as well as,3. Translate the following into English (1) 活塞环 (2) 活塞销 (3) 环槽 (4) 环岸 (5) 压缩环 (6) 油环 (7) 主轴承 (8) 合金钢 (9) 正时齿轮 (10) 齿圈,4. Translate the following passage into Chinese Connecting Rod Bearing Noise,Valve Actuating Component Noise,
