Chapter 4 Steering and Suspension Systems
4.1 Steering System
Figure 4-4 Servolectric - a electric power steering system
Chapter 4 Steering and Suspension Systems
2.提高翻译技巧，能较熟练翻译课文
1. 重点：转向、悬架系统的基本组成、类型、 各系统主要零件的英文名称
2.难点：电动转向系统
Chapter 4 Steering and Suspension Systems
4.1 Steering System 1. Basic Parts of Steering System 2. Types of Steering System 3. Power Steering Systems 4.2 Suspension Systems 1. Basic Parts of Suspension System 2. Front suspension 3. Rear Suspension
1.Basic Parts of Steering System
The basic steering system (Figure 4-1) can be divided into three main assemblies:
·The spindle and steering arm assemblies. ·The linkage assembly connecting the steering arms and steering gear. ·The steering wheel, steering shaft, and steering gear assembly.
2. Types of Steering System There are two types of steering systems: manual steering and power steering systems. In the manual steering systems, driver does all the work of turning the steering wheel, steering gear, and tires. In the power steering systems, hydraulic or electric power-assisted steering is used to reduce the effort required by turning the steering wheel. There are three types of the steering gears in use: recirculating ball steering gear, worm-and-roller steering gear and rack-and-pinion steering gear. 3. Power Steering Systems Hydraulic lack-and-pinion power steering system. This system consists of mechanical rack-and-pinion steering gear, hydraulic working cylinders with working plungers, rotary slide valve, oil pump, pressure-limiting valve and oil reservoir (Figure 4-2).
attenuate [ə'tenjueit] v.变薄，变细，变小，减弱
oscillation [¸ɔsi'leiʃən] n.振动，摆动，波动，振荡
strut
[strʌt]
n.支柱，支杆，支撑
transverse [træns'və:s] a.横向的
Chapter 4 Steering and Suspension Systems
蜗杆滚轮式转向器 齿轮齿条式转向器 工作缸 工作活塞 滑阀 速敏动力转向 电-液转换器 蜗杆副
Chapter 4 Steering and Suspension Systems
4.1 Steering System
2.4.2 Text The steering system is designed to allow the driver to
plunger
['plʌndʒə] n.活塞，柱塞，活动铁芯
rotary
['rəutəri] a.旋转的，转动的
speedometer [spi'dɔmitə] n.(指汽车的)车速表，里程计
relevant
['relivənt] a.有关的，切题的，恰当的
Chapter 4 Steering and Suspension Systems
Chapter 4 Steering and Suspension Systems
4.1 Steering System
Figure 4-2 A hydraulic rack-and-pinion power steering system with rotary slide valve
Chapter 4 Steering and Suspension Systems
4.2 Suspension Systems
4.2.1 New Words and Phrases
bump
[bʌmp]
n.碰撞，(因碰撞而起的)肿块，(路面 的)凸块
twist
[twist]
v扭转，扭弯，旋转，捻，搓
rebound, [ri'baund] v.弹回，回弹，跳回
diminish [di'miniʃ] v.减少，减小，缩减
Chapter 4 Steering and Suspension Systems
4.1 Steering System
Figure 4-3 Servotronic-a electro-hydraulic power steering system
Chapter 4 Steering and Suspension Systems
4.1 Steering System
Electro-hydraulic power steering system-Servotronic.
Servotronic is an electronically controlled rack-and-pinion steering system in which the hydraulic assisting forces are influenced by the driving speed. At low driving speeds, the full assisting force of the hydraulic rack-and pinion steering takes effect. The hydraulic assisting force is reduced as driving speed increases. So, Servotronic is a speed-sensitive power steering. Servotronic consists of electronic speedometer, ECU, hydraulic rack-and-pinion steering gear, oil reservoir, electro-hydraulic converter and oil pump (Figure 4-3).
Chapter 4 Steering and Suspension Systems
4.1 Steering System
2.4.1 New Words and Phrases
spindle
['spindl] n.主轴，心轴，转向节
linkage
['liŋkidʒ]
n.连接，连接装置，联动装置，传 动装置
4.1 Steering System
Electric power steering-Servolectric. With Servolectric
(Figure 4-4), the assisting force is generated by an electronically controlled electric motor. The electric motor is only switched on when required.
The steering torque applied by the driver is measured via a torsion rod with a torque sensor and in addition the speed is measured via a speed sensor. The two signals are fed to the ECU. The ECU calculates the torque required and its force-transfer direction using stored program maps and sends the relevant output signals to the electric motor. The latter generates an assisting torque which is transformed by a worm-gear pair and transmitted to the rack and-pinion steering gear.
4.1 Steering Steering arm steering gear steering shaft manual steering power steering recirculating ball steering gear