汽车专业英语课件与汽车专业英语读译教程2版配套19U11TA.pptVIP

UNIT 11 SUSPENSION AND STEERING SYSTEMSTEXT ABasic Parts and Types of the Suspension and Steering Systems  TEXT ABasic Parts and Types of the Suspension and Steering Systems  ? Basic Suspension System ? Components ? Types  ? Steering System ? Steering Gear ? Power Steering 本次课学习目标 掌握转向与悬架系统的英文专业词汇 掌握转向与悬架系统主要类型 训练快速阅读能力，提高阅读速度 NEW WORDS Air Shock Absorbers Some suspension systems incorporate two adjustable air shock absorbers that are attached to the rear suspension and connected to an air valve with flexible tubing. Air operated shock absorbers have hydraulic dampening systems which operate in the same manner as those on conventional shocks. In addition, they contain a sealed air chamber, which is acted on by pressure from a height control sensor. Varying the pressure to the air chamber causes the air shock to increase or decrease its length or operating range. Air pressure is delivered to the air shocks through plastic tubing. The tubing connects the shocks to an air valve. Air pressure for raising the shocks is generally obtained from an outside source, such as a service station compressor, and is admitted through the air valve. To deplete the shocks of unwanted air (lower vehicle curb height), the air valve core is depressed, allowing air to escape. Control Arms All vehicles have either control arms or struts to keep the wheel assembly in the proper position. The control arms and struts allow the wheel to move up and down while preventing it from moving in any other direction. The wheel will tend to move in undesirable directions whenever the vehicle is accelerated, braked, or turned. Vehicle suspensions may have control arms only or a combination of control arms and struts. Types of the Suspension Front Suspension Systems Almost all modern front suspension systems are independent. With an independent suspension, each front wheel is free to move up and down with a minimum effect on the other wheel. I