汽车专业外语052ppt课件.ppt
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1、,The Brake System 制动系统,Unit 6,Passage A,The most important system in your car. If the brakes dont work properly, the result can be disastrous. Good brakes are essential for safety.,Passage A,Brake system (),Passage A,Brake system (),Passage A,Two completely independent braking system,Service brake M
2、ain braking system used to slow down or stop the car during normal driving. Foot-operated by the driver depressing and releasing the brake pedal. Parking brake (Hand brake) Hold a car stationary while it is unattended, and to keep the car from rolling on unleveled ground.,Passage A,Brake system (),P
3、assage A,Basically, all car brakes are friction brakes. When the driver applies the brake, the control device forces brake shoes / pads against the rotating drums / disks at wheel. Friction between the shoes / pads and the drums / disks then slows / stops the wheels so that the car is braked.,Passag
4、e A,Brake system (),Passage A,Disk brake,Used for years for front wheel applications, are fast replacing drum brakes on the rear wheels of modern cars, due to their simpler design, lighter weight and better braking performance. Provides significantly better resistance to brake fade compared with dru
5、m type braking system. Main components: Brake pads, Caliper, Disk / Rotor,Passage A,Brake system (),Passage A,Brake pad,http:/ lining riveted or bonded to it. Mounted in the caliper, one on each side of rotor. Asbestos are primarily used because of its heat absorbing properties and quiet operation.,
6、Passage A,Brake system (),Passage A,Caliper,Floating calipers and fixed calipers,http:/ A,Brake system (),Passage A,Caliper,How does a floating caliper work? Floats or moves in a track in its support so that it can center itself over the motor. The hydraulic fluid pushes in two direction. Firstly, i
7、t forces the piston against the inner pad which in turn pushes against the rotor. Secondly, it also pushes the caliper in the opposite direction against the outer pad which pushes the other side of the rotor.,Passage A,Brake system (),Passage A,Caliper,Single piston calipers are the most popular and
8、 also least costly to manufacture and service. Floating calipers are also available on some vehicles with two pistons mounted on the same side.,http:/ an improved braking feel, found on more expensive cars,Passage A,Brake system (),Passage A,Caliper,Fixed calipers are mounted rigidity to support and
9、 are not allowed to move.,http:/ brake feel and more efficient, while more expensive to produce and cost more to service.,8-piston High Performance Brake System from AC Schnitzer,Passage A,Brake system (),Passage A,Disk rotor,Be made of iron with highly machined surfaces where the brake pads contact
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