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1、项目八 汽车性能参数及检测设备,Brief Introduction,Word List,adjustable adj.可调整的ambient adj.周围的，环绕的apparatus n.器械，设备，仪器compact adj.紧凑的，紧密的，简洁的coupe n.供两人坐的小汽车cradle vt.将.放在摇篮内，支持，支撑deflect v.(使)偏转deterrent n.威慑dynamic adj.动力的，动力学的，动态的estimate v.估计，估价，评估,Components cognition,Components cognition,Components cognition
2、,Components cognition,Components cognition,Components cognition,Components cognition,Components cognition,Components cognition,Components cognition,Components cognition,Proper Names,4-Wheel Alignment gauge 四轮定位仪automobile brake tester 汽车制动性能测试仪braking performance 制动性能chassis dynamometer 底盘测功机diesel
3、smoke meter 柴油机烟度计drive-wheel 驱动轮engine analyzer 发动机分析仪engine test bed 发动机试验台fifth wheel sensor 五轮传感器,kingpin inclination 主销内倾角leak detector 泄漏检查器performance parameter 性能参数performance tester 性能测试仪power absorption unit 动力吸收单元side-slip tester 测滑测试仪single board computer 单片机speedometer tester 车速表测试仪ultr
4、asonic microphone 超声波扩音器ultrasonic probe 超声波探测器,Proper Names,makes use of 使用，利用rubber bushing 橡胶套管engine knock 发动机爆震metal diaphragm 金属膜片fuel consumption sensor 燃油消耗传感器headlight tester 前照灯检测仪infrared absorption analyzer 吸收式红外分析仪kingpin caster 主销后倾角ultrasonic transmitter 超声波讯号发送器wheel camber 轮外倾角wheel
5、 dynamic balancer 轮动态平衡机,Proper Names,Engine Noise Diagnosis The ability to diagnose engine noises with a fair degree of accuracy may be a vital part of the tune-up specialists job.For instance,it may be necessary for a technician to recognize and locate the cause of noises that may develop due to n
6、ormal engine wear and tear over long periods of use or may appear because of failure of one or more engine parts.,Text learning-example,The parts that produce some characteristic noises are loose pistons,excessively worn rings or ring lands,loose piston pins,worn connecting-rod bearings,worn main be
7、arings,loose vibration damper or flywheel,or worn or loose valve-train components.When properly interpreted,these noises are a definite aid in any diagnosis of engine mechanical difficulties.But there are many sources and varieties of engine noises;careful interpretation of these sounds is necessary
8、 for several reasons.,First,a careful diagnosis of an engine noise can often prevent the expense of tearing down an engine.In this regard,a technician should always make a noise analysis before engine repair begins so that only the needed and correct operations are made with no extra work or charges
9、 to the customer.Second,a careful interpretation of abnormal engine sounds can prevent the engine from requiring extensive and costly repair work after continued usage has ruined it.,StethoscopeAll moving mechanical engine parts create some form of sound waves of various pitches,frequencies,qualitie
10、s,and intensities.Most people can hear many of these sound waves without the assistance of a listening device.On the other hand,some sounds are impossible to hear unless magnifies;even if some sounds are audible,they are frequently difficult to localize and locate.Consequently,most technicians utili
11、ze some form of sounding rod or stethoscope when diagnosing engine sounds.,A stethoscope,or sound scope,aids in locating the source of engine knocks and noises by magnifying their sound waves.This instrument makes use of a metal prod,about 8 inches long and 1/8 inch in diameter,that passes through a
12、 rubber bushing and terminates against a metal diaphragm held in a plastic housing.Furthermore,two ear tubes carry the sound from this diaphragm chamber to the listeners ears.The value of the sound-detecting and amplifying stethoscope is,of course,to help the technician distinguish the difference be
13、tween normal and abnormal sounds and to find the location and cause of the latter.,Sound tracing with the stethoscopeThe best way to trace any type of noise is to follow a systematic procedure.First,for example,always use a stethoscope or other sounding device to amplify the sound.Second,with the li
14、stening device,attempt to localize and identify the noise.You can trace both unfamiliar and familiar sounds to the portion of the engine where they originate by following the sound with the prod of the stethoscope until the noise reaches its maximum intensity.After you locate this spot,a knowledge o
15、f engine construction and operation will be your best guide as to the most likely cause of the sound.,Notes,1.The chassis dynamometer measures the mechanical power of the vehicle at the drive-wheels and provides the operator with a readout in units of road speed and power.翻译：底盘测功机能测量车辆驱动轮上的机械功率，并能给操
16、作员显示车辆的道路行车速度和功率具体读数。2.There are seven sensors-ignition,power supply,voltage,oil pressure,cylinder pressure,vibration and fuel injection sensors.翻译：发动机分析仪上有七种传感器，分别是点火传感器、电源供给传感器、电压传感器、油压传感器、气缸压力传感器、振动传感器和燃油喷射传感器。,Translation of difficult sentence,3.The value of the sound-detecting and amplifying st
17、ethoscope is,of course,to help the technician distinguish the difference between normal and abnormal sounds and to find the location and cause of the latter.翻译：起探测声音和放大声音作用的听诊器，其声音强度有助于技师辨别发动机内的正常声音和异常声音，并使他发现发出异常声音的部位和原因。4.You can trace both unfamiliar and familiar sounds to the portion of the engi
18、ne where they originate by following the sound with the prod of the stethoscope until the noise reaches its maximum intensity.翻译：用听诊器探针探测噪音，直到所探测到的噪音强度最大，从而发现噪音部位，通过这种方法，你就可以跟踪那些熟悉或不熟悉的噪音找到发动机上噪音源。,Practical reading notes,1.The parts that produce some characteristic noises are loose pistons,excessiv
19、ely worn rings or ring lands,loose piston pins,worn connecting-rod bearings,worn main bearings,loose vibration damper or flywheel,or worn or loose valve-train components.翻译：产生带某种特征噪音的部件有松动的活塞、过度磨损的活塞环或环岸、松动的活塞销、磨损的连杆轴承、磨损的主轴承、松动的减振器或飞轮以及磨损或松动的配气机构的元件。2.Second,a careful interpretation of abnormal eng
20、ine sounds can prevent the engine from requiring extensive and costly repair work after continued usage has ruined it.翻译：再则，对发动机异常噪音的正确解读能避免发动机在已经损坏的情况下继续使用，否则会导致后续的大量维修工作和昂贵的维修费用。,3.The sideslip tester measures the distance in meters over which a wheel of an axle is dragged sideways,when the other
21、wheel of that axle runs straight for one kilometer.翻译：侧滑试验台以米为单位来测量，当某一轴上的一个车轮笔直向前行驶一千米时，该车轴上的另一车轮被向一旁牵引的距离（即侧滑量）。4.A diesel smoke meter uses micro-waves to detect the density of black smoke contained in the exhaust gas discharged from the diesel engine through an exhaust pipe.翻译：柴油机烟度计用微波来检测柴油机排气管中
22、所排出的废气中包含的黑烟的浓度。5.The leak detector is used for locating leaks in any pressure and vacuum system,and is also used to examine the discharge troubles in electric apparatus.翻译：泄露检查器用于查找所有压力和真空系统中的泄露点，也用于查找电气设备中的漏电故障。,Exercises,1.Choose the best answer from the following choices according to the text1)D
23、iesel Smoke Meter is used for the measurement of smoke emitted from vehicle with engine.A.gasoline B.diesel C.Liquefied Petroleum Gas D.natural gas 2)If the engine does not burn up all the fuel during the combustion process,raw gasoline goes out the tailpipe and registers as on the meter.A.CO B.CO2
24、C.NOx D.HC 3)The typical chassis dynamometer consists of rollers,a remote control pendant,and readout instruments.A.two B.three C.four D.five 4)The weights of the size indicated are placed on the wheel rim in the proper position(from each other on opposite wheel rims).A.90 B.120 C.180 D.270,2.Transl
25、ate the following into Chinese 1)microcomputer 2)technician 3)speedometer 4)kingpin inclination 5)wheel camber 6)opacimeter 7)fuel consumption 8)leak detector 9)power absorption unit3.Translate the following into English1)柴油机烟度计 2)底盘测功机 3)发动机试验台4)四轮定位仪 5)发动机分析仪 6)测滑测试仪7)五轮传感器 8)单片机 9)车轮动平衡仪,Exercise
26、s,4.Translate the following sentences into Chinese1)Small,economical,and fun,the Ford Focus is a smart choice for those looking for a compact car.2)There are two types of automobile brake tester,reaction type automobile brake tester and flat automobile brake tester.3)The electrical logging system an
27、alyses and handles signals with a single board computer.4)The speedometer tester is used for checking the precision and the performance of automobile speedometer.5)Headlight Tester is designed for testing the luminous intensity and the illuminating position(or the optical axis deviation amount)of the high beam/low beam of vehicle headlight.,Exercises,5.Translate the words or phrases in the following figure into Chinese,Exercises:Translate the figure,THANK YOU,浙江交通职业技术学院,
