课 时 计 划
任课班级： 汽车091 班 教案编号： 1 周 1 号
2010 ～ 2011 学年度第 二 学期
| 哥拉巴公园 题目 | Brake System 1 |
教 学 目 标 | 1.Students are able to get the idea of brake system |
授课类型 | | 教学场所 | |
教 学 重 点 | 1.Brake system ✧foot brake ✧parking brake ✧anti-lock brake system ✧piston boot and piston removal ✧piston al removal 伤心的句子说说心情✧inspection ✧pad wear check |
思 考 题 或 作 业 题 | R尖椒炒猪肚ecite the terms and phras of suspension system and axles Recite the fig: Differential components |
授 课 效 果 分 析 | |
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教研室主任 签字： 教学时间：2010 年 月 日
教 学 内 容 整 体 易大设 计 | 教学内容 | 教学方法 | 时间分配 |
I. Description ✧foot brake ✧parking brake ✧anti-lock brake system II. Disasmbly Service of Disc Brake ✧piston boot and piston removal 篮球技术教学✧piston al removal 过年怎么画✧inspection ✧pad wear check III. Exercis | Ca model Fig showing and explaining Fig showing and explaining Inductive teaching method | 20 30 20 20 |
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Braking system
Revision:
僳僳族
✧Suspension system
✧Dictation: phras translation
New content:
The modern automotive brake system has been refined for over 100 years and has become extremely dependable and efficient.
The typical brake system consists of disk brakes in front and either disk or drum brakes in the rear connected by a system of tubes and hos that link the brake at each wheel to the master cylinder. Other systems that are connected with the brake system include the parking brakes, power brake booster and the anti-lock system.
This process is similar to a bicycle brake where two rubber pads rub against the wheel rim creating friction.
With drum brakes, fluid is forced into the wheel cylinder, which pushes the brake shoes out so that the friction linings are presd against the drum, which is attached to the wheel, causing the wheel to stop.
In either ca, the friction surfaces of the pads on a disk brake system, or the shoes on a drum brake convert the forward motion of the vehicle into heat. Heat is what caus the friction surfaces (linings) of the pads and shoes to eventually wear out and require replacement.
Let's take a clor look at each of the components in a brake system and e where other problems
Master Cylinder
The master cylinder is located in the engine compartment on the firewall, directly in front of the driver's at. A typical master cylinder is actually two completely parate master cylinders in one housing, each handling two wheels. This way if one side fails, you will still be able to stop the car. The brake warning light on the dash will light if either side fails, alerting you to the problem. Master cylinders have become very reliable and rarely malfunction; however, the most common problem that they experience is an internal leak. This will cau the brake pedal to slowly sink to the floor when your foot applies steady pressure. Letting go of the pedal and immediately stepping on it again brings the pedal back to normal height.
Brake Fluid
Brake fluid is special oil that has specific properties. It is designed to withstand cold temperatures without thickening as well as very high temperatures without boiling. (If the brake fluid should boil, it will cau you to have a spongy pedal and the car will be hard to stop.) Brake fluid must meet standards that are t by the Department of Transportation (
DOT). The current standard is DOT-3, which has a boiling point of 460: F. But check your owners manual to e what your vehicle manufacturer recommends.
从没离开过The brake fluid rervoir is on top of the master cylinder. Most cars today have a transparent rervoir so that you can e the level without opening the cover. The brake fluid level will drop slightly as the brake pads wear. This is a normal condition and no cau for concern. If the level drops noticeably over a short period of time or goes down to about two thirds full, have your brakes checked as soon as possible. Keep the rervoir covered except for the amount of time you need to fill it and never leave a can of brake fluid uncovered. Brake fluid must maintain a high boiling point. Exposure to air will cau the fluid to absorb moisture, which will lower that boiling point.
