专业英语段落翻译.docx

专业英语段落翻译

第一篇：专业英语段落翻译Thecamshaftisarotatingshaftthathaslobes,celledcams,openingandclosingtheintakeandexhaustvalvesintimewiththemotionofthepiston.Whenthecampushesagainstthelifter,thelifterinternpushesthevalveopen.Whenthecamrotatesawayfromthelifter,thevalveisclosedbyaspringthatisattachedtothevalve.thecamshaftmustbesynchronizedwiththecrankshaftsothatitmakesonerevolutionforeverytworevolutionofthecrankshaft.thisisacriticaljob,andcanhaveagreatimpactonanengine’sperformanceatdifferentspeeds.在活塞运动的同时，凸轮的旋转可以及时控制进气出气阀门的开启与关闭。当凸轮运动推动挺柱时，挺柱会有次序的推动阀门的开启。当凸轮旋转远离挺柱时，阀门上的弹簧会关闭阀门。凸轮轴必须与曲轴同步运转以保证曲轴每旋转两个周期凸轮轴旋转一个周期。这是一个关键性动作，并且对发动机性能在不同转速都会有很大影响。Drivingacarwithamanualtransmission,youdepresstheclutch,selectagear,andreleasethecultchwhileapplyingpowertogetthecartomove.Theclutchallowsenginepowertobeappliedgraduallywhenavehicleisstartingout,andinterruptspowertoavoidgearcrunchingwhenshifting.Engagingtheclutchallowspowertotransferfromtheenginetothetransmissionanddrivewheels.Disengagingtheclutchstopsthepowertransferandallowstheenginetocontinueturningwithoutforcetothedrivewheels.驾驶一辆带有手动变速器的汽车时，踩下离合器时，选择一个档位，当有能量输入时松开离合器使汽车运动。当发动汽车时发动机的功率会逐渐被传送到离合器，换挡时中断功率可以避免齿轮之间的摩擦声音。接合离合器，发动机的动率就会传送到变速器和驱动轮。松开离合器阻止能量的传送，并且发动机在没有能量输送到驱动轮的情况下还可以正常运转。Therack-and-piniongear-setdoestwothings:Itconvertstherotationalmotionofthesteeringwheelintothelinearmotionneededtoturnthewheels.Itprovidesagearreduction,makingiteasiertoturnthewheels.Onmostcars,ittakesthreetofourcompleterevolutionsofthesteeringwheeltomakethewheelsturnfromlocktolock(fromfarlefttofarright).齿轮齿条齿轮组有两大功能：1.把转向盘的旋转运动转变成直线运动来控制车轮。2.可以使齿轮减速从而更便捷地控制车轮的转向。对于大多数的汽车，转向盘的总回圈数（从最左边到最右边）需要3-4圈的完全旋转。Oiliscirculatedthroughtheenginebyanoilpump.Mostoilpumpshavetwosmallgearsthatmeshwitheachother.Apressure-regulatorvalveinthepumpisusedtopreventthelubricationsystemfromreachingtoohighapressure.Theoilpumppullsoilupfromtheoilpanthroughthepick-upscreen.Thescreencollectsanylargeparticlesofdirtsothattheoilenteringthepumpisfairlyclean.Thepumpthendirectstheoilthroughanoilfil