汽车专业外语053ppt课件.ppt
《汽车专业外语053ppt课件.ppt》由会员分享,可在线阅读,更多相关《汽车专业外语053ppt课件.ppt(22页珍藏版)》请在三一文库上搜索。
1、,Automobile Suspension System 汽车悬架系统,Unit 7,Passage A,The main function is to provide comfortable, safe ride control.,Passage A,Suspension system,http:/ A,Suspension system,Passage A,For safety, especially in cornering, the suspension system must keep the wheels upright, or nearly upright, under all
2、 driving condition; a tire can tightly remain contact with the ground only when its tread is flat on the road. Therefore, the tire should be upright when the car is accelerating and cornering, especially the outside wheel that is carrying most of the load; when braking as the front of the car dips a
3、nd the rear rises; and finally, when it is deflected up or down by road irregularities.,Passage A,Suspension system,Passage A,Operate basically in the same way. Differ in type and arrangement of linkages used to connect these parts to the frame and wheel.,Basic parts: Spring and shock absorber,http:
4、/shiningmotor.en.made-in- A,Suspension system,Passage A,Coil spring, leaf spring, torsion bar spring and air spring,Spring types,Coil spring: A round bar spring steel that is wound into the shape of a coil Pros and Cons Compactness, lack of moving parts, excellent weight supporting Weakness in suppo
5、rting side to side or lateral movement,http:/ A,Suspension system,Passage A,Leaf spring,Several layers of spring steel stacked one upon the other. Spring eyes for locating and fastening the spring to the frame or underbody. Fiber or plastic pads are used to reduce internal leaf friction. Held togeth
6、er in the middle by a center bolt and on the ends by rebound clips. Pros and Cons Control vehicle sway and lateral movement Weak shock absorption,http:/www.flmvpa.org/articles/armymotors_gill.htm,http:/ A,Suspension system,Passage A,Torsion bar spring,Held at one end to the suspensions control arm a
7、nd at other end to the vehicles frame. A vertical impact on a wheel is transmitted through the control arm to the torsion bar, the torsion bar twists to absorb the impact. The bars natural resistance to twisting quickly restores it to its original position.,http:/ A,Suspension system,Passage A,Air s
8、pring,A rubber bag or bladder full of air. A piston is attached to the lower control arm. Movement of the lower control arm causes the piston to move into the air bladder and compress the air in it.,http:/ pressure is used to regulate how easy or hard the bladder can be compressed. The air bladder i
9、s usually connected to an air compressor, which regulates the action of the air spring based on road conditions.,Passage A,Suspension system,Passage A,Shock absorber,When the coil, leaf spring, torsion bar, or air spring is deflected, it can oscillate uncontrollably, possibly causing the tires to lo
10、se contact with the road. This could cause the car to bounce up and down without any control.,http:/ absorber is used to prevent this from happening, not to absorb shocks, but to control spring rate and dampen spring oscillations.,Passage A,Suspension system,Passage A,Shock absorber,Hydraulic device
11、 One end of it is attached to a wheel assembly and the other end is attached to the vehicle frame. Movement is limited by forcing fluid inside it through passage or orifice. This causes the shock absorber to compress or extend at a slow rate. The action of compression and extension controls spring r
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 汽车 专业 外语 053 ppt 课件
链接地址:https://www.31doc.com/p-2607632.html