专业英语 2
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▲List the main parts of the automobiles.
Four major categories: body ,Engine, chassis and electrical system.
▲Which systems does a chassis include and what are the main functions of the chassis? The chassis includes the power train,steering,suspension,and braking systems. 1) Power train system conveys the drive to the wheels. 2) Steering system controls the direction of movement. 3) Suspension and wheels absorb the road shocks. 4) Brake slows down the vehicle. ▲What does 6×2 stand for? Six by two
▲Explain the operation process in the spark-ignition engine?
The cycle of operations is spread over four piston strokes.The operating strokes are:Induction Stroke、Compression Stroke、Power Stroke、Exhaust Stroke. ▲what are the basic parts of the steering system?
Steering bos、steering column、steering linkage、steering knuckle. ▲what are the basic parts of the suspension system? Springs、shock absorber、
▲what are the two main ways of building automobiles?
They are built using body/frame construction and unitized construction.
▲what are the two types of the braking systems used in modern vehicles? Drum brakes、disc brakes
▲what are the two types of the steering systems used in modern vehicles? Recirculating ball、rack -and- pinion
▲explain the terms:oversteer and understeer
When a vehicle oversteers,it covers a smaller curve radius than that corresponding to the steering-wheel angle;
When a vehicle understeers,it covers a larger curve radius.
▲how many types of hybrid electric vehicle there are? List them and describe them briefly. 1)Series Hybrid : a series hybrid uses a high efficiency engine,or even a small turbine,to generate electrical power for the electric motor.
2)Parallel Hybrid :the combustion engine works in conjunction with an electric motor,to provide extra torque to the powertrain system in the car.
3)Fuel cell : a fuel cell designed vehicle converts hydrogen rich fuels into rlectrical energy stored in the vehicle’s battery pack.
▲what is the suspension used for? List the basic parts of it?
The function of suspension system : ①Flexibly connect the wheels to the body
②Deliver the power and moment from the road to the body ③Damp out the spring oscillations quickly The basic past of it : 答案在上面 ▲Be familiar with the engine terms.
TDC(top dead center) : the position of the crank and piston when the piston is farther away from the crankshaft.
BDC(bottom dead center) : the position of the crank and piston when the piston is nearest to the crankshaft.
Stroke : the distance between BDC and TDC;stroke is controlled by the crankshaft. Bore :the internal diameter of the cylinder.
Swept volume :the volume between TDC and BDC.
Engine capacity :this is the swept volume od all the cylinder ,e.g. a four-cylinder engine having a capacity of two liters has a cylinder swept volume of 500 cm3.
Clearance volume : the volume of the space above the piston when it is at TDC. Comptession ratio ε=(swept vol + clearance vol) / (clearance vol) Two-stroke :a power stroke every revolution of the crank. Four-stroke : a power stroke every other revolution of the crank.
▲List the main three types of harmful emissions, and three types of emission control methods.
The harmful emissions are :Carbon monoxide (CO)、Nitrigen oxides(NOx)、Hydrocarbons(HC). The control methods :大神们自己看书概括吧(P64到P65)
▲According to the steering force sources, the steering systems are divided into two types, list them. For the power steering system, please list two main types.
Two types of the steering system :recirculating ball 、rack -and- pinion.
Two types of the power steering system:Hydraulic Power Assisted Steering(HPAS)、Electric Power Assisted Steering (EPAS).
▲For the suspension system, list three normally adjustable parameters of the front wheel alignment.
The three normally adjustable angles are caster、camber、toe.(五个参数;四个定位角和一个偏移量)
▲what is the meaning of ABS? how does the ABS work in a modern passenger car? ABS :Antilock Braking System
Antilock Braking System (ABS) are control devices within braking systems which prevent the wheels from locking up during braking.
以上只是针对问题而言的部分名词解释,详情看书本内容,简答题不看书不行哦。
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