【正文】 ?The flywheel is made from carbon steel. It fits onto the rear of the crankshaft. ?3．飛輪可通過離合器，將動力傳給變速箱。 III. Exercises ?3． The number of bearings used usually depends on the number of cylinders in the engine, and the design of the engine. ?曲軸主軸承的數(shù)量常常取決于發(fā)動機(jī)缸體的數(shù)量和發(fā)動機(jī)的設(shè)計。 ?I as well as they am ready to help you. ?不僅他們愿意幫助你，我也愿意幫助你。 II. Text Explanation ? eliminate [i?limineit] vt. 排除 , 消除 ? vibration [vai?brei??n] ? n. 振動 , 顫動 , 搖動 , 擺動 ? counter balanced weight 平衡重 ? crank arm 曲柄 II. Text Explanation ?be provided with 為 ......提供 ….. 裝備 ?provide sb with sth=provide sth for sb ?為某人提供什么 ?Sheep provide us with wool. ?羊供給我們羊毛。 ?2. 不活動 。間歇 (性 )的 ?the periodic motion of a pla ?行星的周期運(yùn)動 ?be taken by ?對 ...很喜愛， 被 ...迷住 , 被 ...吸引 II. Text Explanation ?Inertia [in39。 ?The top two rings are to keep the gases in the cylinder and are called pression rings. The lower one prevents the oil splashed onto the cylinder bore from entering the bustion chamber, and is called an oil ring. III. Exercises ?variable pression ratio 縮寫 VCR ?可變壓縮比 ?Function: ?Satisfying high pression for starting and lower pression under load III. Exercises Specialized English for Automobile Specialized English for Automobile Unit 24 Crankshaft and Flywheel Contents I. Prequestions II. Text Explanation III. Exercises I. Prequestions What?s the crankshaft assembly posed of? crankshaft bearings timing gear flywheel belt pulley I. Prequestions ?What is regarded as the “backbone” of the engine and why? ?Crankshaft, because it can change the reciprocating motion of the piston into rotary motion and handle the entire power output. Components： I. Prequestions rod journal crankshaft journal rear end balanced weight crank front end ?What?s the function of the flywheel? ?helping the engine to run smoothly by absorbing some of the energy during the power stroke and releasing it during the other strokes； ?carrying the clutch, which transmits the drive to the gearbox； ?has the starter ring gear around its circumference. I. Prequestions ?Where is the flywheel in the engine? ?the rear of the crankshaft. I. Prequestions the starter ring gear II. Text Explanation ? The periodic gas and inertia forces taken by the crankshaft may cause it to suffer wear and bending or distortion. ? bending [?bendi?] ? n. 彎曲 (度 ), 撓度 ? distortion [dis?t????n] ? n. 扭曲 , 變形 , 曲解 , 失真 ? 譯文： 周期性的氣體作用力和慣性力作用于曲軸，會使曲軸遭受磨損、彎曲或扭曲變形。用來支撐活塞銷的活塞厚的部分稱為活塞銷凸臺。 ?2． The piston and rod assembly transmits the power from bustion chamber to the crankshaft. ?活塞連桿組將燃燒室的能量傳遞給曲軸。 II. Text Explanation Classification of piston top shape diagram flat convex concave ?To avoid misplacing the rod caps during assembly, the connecting rods and their mating caps are marked on one side with serial numbers, starting with the first rod from the radiator, to identify their location in the engine. ?譯文： 為了避免裝配錯誤，從散熱器的一側(cè)為開始，在連桿以及與其相配的連桿蓋的一側(cè)標(biāo)注有序列數(shù)以區(qū)分它們在發(fā)動機(jī)中的位置。 II. Text Explanation ?serve as vt. 擔(dān)任 (充當(dāng) ,起 ...的作用 ) ?These philosophical views serve as a guide in life. ?這些哲學(xué)觀點(diǎn)可以 作為 處世指南。 II. Text Explanation ?cut into v 減少，侵犯 , 打斷 ?Don39。 ?It should be paid attention to the direction when fixing the cylinder gasket . ?2．鋁制缸體為了提高它的剛度，常常要在氣缸中安裝缸套。 5 oil pan ?It has long since been established practice to bine the cylinder block and crankcase into a single unit, this generally being termed “monobloc” construction. The historical origins of this form of construction date back to the early 1920s, when there was a general trend towards simplification of the engine structure. III. Exercises ?Until then the cylinder block and crankcase were produced as separate units, in cast iron and aluminum alloy respectively, and then bolted together . In relation to modern engine design, the monobloc construction provides a very necessary rigid foundation for the engine and reduces manufacturing costs. III. Exercises ?I. Translate the following sentences into Chinese. ?1． In order to make the aluminum stronger and less likely to warp, certain materials are added to the metal or a steel liner placed in the block. ?為了使鋁制缸體剛度更強(qiáng)和盡可能的減少磨損，可將一些材料加入其中或者在缸體中安裝缸套。 區(qū)別 II. Text Explanation ? cylinder block ? cylinder head ? oil pan ? cylinder gasket ? cylinder liner ? wedgeshaped bustion chamber ? basinshaped bustion chamber ? inline engines ? spark plugs ? injection III. Exercises ?Translate the following expressions into Chinese. ? 氣缸體 ? 氣缸蓋 ? 油底殼 ? 氣缸墊 ? 缸套 ? 楔形燃燒室 ? 盆形燃燒室 ? 直列發(fā)動機(jī) ? 火花塞 ? 噴油器 III. Exercises 1 cylinder head cover。 ?4. 使關(guān)心 (+about/with) ?He was very concerned about her. 他對她非常關(guān)心。 ?3. 使擔(dān)心 。 II. Text Explanation ?With the increased concern for providing higher output and lower fuel consumption, car manufactures are trying to make the vehicle lighter. ?Concern , 關(guān)系到 , 關(guān)注 ?concern for 對 ...的關(guān)心 /憂慮 ?concern with 和 ...有關(guān)（一般用 ...+be concerned with...） ? consumption n. 消費(fèi) , 消費(fèi)量 ?譯文： 隨著對汽車產(chǎn)量和低燃耗的關(guān)注度越來越高，汽車生產(chǎn)廠家盡量把汽車做的輕一些。 ?When revolving, the water pump circulates coolant between the engine water jackets and the radiator. III. Exercises III. Exercises ? Principle of Fourstroke Engine intake stroke press stroke power stroke exhaust stroke Intake valve Exhaust valve Specialized English for Automobile Specialized English for Automobile Unit 22