汽車制動系統(tǒng)外文翻譯-文庫吧資料
2025-01-12 13:06本頁面
【正文】 igned to work in extreme conditions, fill the system. “Shoes” and “pads”are pushed by the slave cylinders to contact the “drums” and “rotors”thus causing drag, which(hopefully) slows the car. The typical brake system consists of disk brakes in front and either disk of drum brakes in the rear connected by a system of tubes and hoses that link the brake to at each wheel to the master cylinder (Figure). Basically, all car brakes are friction brakes. When the driver applies the brake, the control device forces brakes shoes, or pads, against the rotating brake drum or disk at wheel. Friction between the shoes or pads and the drums or disks then slows or stops the wheel so that the car is braked. In most modern brake systems, there is a fluidfilled cylinder, called master cylinder, which contains two separate sections, there is a piston in each section and both pistons are connected to a brake pedal in the driver’s partment. When the brake pushed down, brake fluid is sent form the master cylinder to the wheels. At the wheels, the fluid pushes shoes, or pads, against revolving drums or disks. The friction between the stationary shoes, or pads, and the revolving drums or disks slows and stops them. This slows or stops the revolving wheels, which, in turn, slow or stop the car. The brake fluid reservoir is on top of the master cylinder. Most cars today have a transparent or reservoir so that you can see the level without open the cover. The brake fluid level will drop slightly as the brake pads wear This is a normal condition and no cause 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 reservoir covered except for the amount of time you need to fill it and never leave a cam of break fluid uncovered. Brake fluid must maintain a very high boiling point. Exposure to air will cause fluid to absorb moisture which will lower that boiling point. The brake fluid travels from the master cylinder to the wheels through a series of steel tubes and reinforced rubber hoses. Rubber hoses are only used in places that require flexibility, such as at the front wheels, which move up and down as well as steer. The rest of the system uses noncorrosive seamless steel tubing with special fittings at all attachment points. If a steel line requires a repair, the best procedure is to replace the pete line. If this is not practical, a line can be repaired using special splice fittings that are made for brake system repair. You must never use copper tubing to repair a brake system. They are dangerous and illegal. Drum brakes, it consists of the brake drum, an expander, pull back springs, a stationary back plate, two shoes with friction linings, and anchor pins. The stationary back plate is secured to the flange of the axle housing or to the steeling knuckle. The brake drum is mounted on the wheel hub. There is a clearance between the inner surface of the dru
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