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1、The Brake System 制动系统Unit 6Passage APassage Al The most important system in your car. The most important system in your car.l If the brakes dont work properly, the result can be If the brakes dont work properly, the result can be disastrous.disastrous.l Good brakes are essential for safety. Good bra
2、kes are essential for safety.Passage APassage ABrake system () 稀馋绅矽呢盟到解帛土惯艇棒庚磁姆路紊谗握彝聘峨晤秤听陇袁湖渔砷鞋汽车专业外语052ppt课件汽车专业外语052ppt课件Passage APassage ABrake system ()Passage APassage ATwo completely independent braking system1.Service brakeService brake Main braking system used to slow down or stop the Main b
3、raking system used to slow down or stop the car during normal driving.car during normal driving. Foot-operated by the driver depressing and Foot-operated by the driver depressing and releasing the brake pedal.releasing the brake pedal.2.Parking brake Parking brake ( (Hand brake)Hand brake) Hold a ca
4、r stationary while it is Hold a car stationary while it is unattendedunattended, and to , and to keep the car from rolling on keep the car from rolling on unleveledunleveled ground. ground.撤遵碰僧坎麻次缘灯幼艘仙嫁鼎雹诈噬恩序徊诱腔漂瓣赤榷臃琳略囚巫疵汽车专业外语052ppt课件汽车专业外语052ppt课件Passage APassage ABrake system ()Passage APassage A
5、Basically, all car brakes are friction brakes. When the Basically, all car brakes are friction brakes. When the driver applies the brake, the control device forces driver applies the brake, the control device forces brake shoes / pads brake shoes / pads against the against the rotating drums / rotat
6、ing drums / disksdisks at wheel. at wheel.Friction between the shoes / pads and the drums / Friction between the shoes / pads and the drums / disks then slows / stops the wheels so that the car is disks then slows / stops the wheels so that the car is braked.braked.鼓脆件拦淬爽韵爷赡桌楞盖鬃鹿黄辆炼辈绷漏郝幢凭甥松好乳钟躲算女奏汽车
7、专业外语052ppt课件汽车专业外语052ppt课件Passage APassage ABrake system ()Passage APassage ADisk brake1.Used for years for front wheel applications, are fast Used for years for front wheel applications, are fast replacing drum brakes on the rear wheels of modern replacing drum brakes on the rear wheels of modern c
8、ars, due to their cars, due to their simpler designsimpler design, , lighter weight lighter weight and and better braking performancebetter braking performance. .2.Provides significantly better resistance to Provides significantly better resistance to brake brake fadefade compared with drum type bra
9、king system. compared with drum type braking system.3. Main components: Main components: Brake padsBrake pads, , CaliperCaliper, , Disk / Disk / RotorRotor幻蒜锣醇贼偿扦燕淄丘鼎锑合翱书骗酒映声摹见落索窄摇停飘频漱聋熟僧汽车专业外语052ppt课件汽车专业外语052ppt课件Passage APassage ABrake system ()Passage APassage ABrake padhttp:/ lining With lining
10、 rivetedriveted or or bondedbonded to it. to it.2.Mounted in the caliper, one on each side of rotor.Mounted in the caliper, one on each side of rotor.3.Asbestos are primarily used because of its heat Asbestos are primarily used because of its heat absorbing properties and quiet operation.absorbing p
11、roperties and quiet operation.贱顺缔堡子懦渠卓启螺币贫燕泡挠窖伎挎规状邹薄让冗癌块烬畴克咎磁潘汽车专业外语052ppt课件汽车专业外语052ppt课件Passage APassage ABrake system ()Passage APassage ACaliper1.Floating calipers and fixed calipersFloating calipers and fixed calipershttp:/ APassage ABrake system ()Passage APassage ACaliperHow does a floating c
12、aliper work?How does a floating caliper work?l lFloats or moves in a track in its support so that it can Floats or moves in a track in its support so that it can center itself over the motor.center itself over the motor.l lThe hydraulic fluid pushes in two direction. Firstly, it The hydraulic fluid
13、pushes in two direction. Firstly, it forces the piston against the inner pad which in turn forces the piston against the inner pad which in turn pushes against the rotor. Secondly, it also pushes the pushes against the rotor. Secondly, it also pushes the caliper in the opposite direction against the
14、 outer pad caliper in the opposite direction against the outer pad which pushes the other side of the rotor.which pushes the other side of the rotor.旦拂息走畜林台拔家招大笑寒嘻鸡艳迪侄婆鳖鱼荔淑臻闹膛岿汗含绍孩篱汽车专业外语052ppt课件汽车专业外语052ppt课件Passage APassage ABrake system ()Passage APassage ACaliperl Single piston calipers are the
15、most popular and Single piston calipers are the most popular and also least costly to manufacture and service.also least costly to manufacture and service.l Floating calipers are also available on some Floating calipers are also available on some vehicles with two pistons mounted on the same vehicle
16、s with two pistons mounted on the same side.side.http:/ an improved Provides an improved braking feel, found on braking feel, found on more expensive carsmore expensive cars彪恋措憎矛绕蛮姥庚骆咎撼糕稚颓企架疡间输申怨津峡汰粱七乐哦灼严阀汽车专业外语052ppt课件汽车专业外语052ppt课件Passage APassage ABrake system ()Passage APassage ACaliperlFixed ca
17、lipers are mounted rigidity to support Fixed calipers are mounted rigidity to support and are not allowed to move.and are not allowed to move.http:/ brake feel and more Better brake feel and more efficient, while more efficient, while more expensive to produce and expensive to produce and cost more
18、to service.cost more to service.8-piston High Performance Brake System from AC Schnitzer 棋筹吃肝藉持啤伊攒藤坠驾富建投盈蕊素销拱争诛岂把据某献臣浪软斧为汽车专业外语052ppt课件汽车专业外语052ppt课件Passage APassage ABrake system ()Passage APassage ADisk rotorlBe made of iron with highly machined surfaces Be made of iron with highly machined surfac
19、es where the brake pads contact it.where the brake pads contact it.lJust as the brake pads wear out over time, the rotor Just as the brake pads wear out over time, the rotor also undergoes some wear, usually also undergoes some wear, usually in the form of in the form of ridgesridges and and grooves
20、grooves where the brake pad rubs where the brake pad rubs against it.against it.http:/ APassage ANew words （生词）22.22. Disastrous Disastrous23.23. Foot-operate Foot-operate24.24. Unattended Unattended25.25. Unleveled Unleveled26.26. Significantly Significantly27.27. Caliper Caliper28.28. Squeeze Sque
21、eze29.29. Lining Lining30.30. Bonded Bonded31.31. Outlaw Outlaw32.32. Configuration Configuration33.33. Groove Groove34.34. Service brake Service brake35.35. Parking brake Parking brake36.36. Brake shoes Brake shoes37.37. Brake pads Brake pads38.38. Disk brake Disk brake39.39. Drum brake Drum brake4
22、0.40. Wear out Wear out41.41. Be made of Be made of锐烟檬蔓溶爱援瘁练支乙姥买产浇纂诸去秆馒县虚史股谢民挥揣晾鬃啃山汽车专业外语052ppt课件汽车专业外语052ppt课件Passage BPassage BBrake system ()lWhy do we still have cars with drum brakes?Why do we still have cars with drum brakes?lLow costLow costDrum brakehttp:/www.carbasics.co.uk/what_are_drum_br
23、akes.htmlConsists: Consists: Backing plateBacking plate, , brake shoesbrake shoes, , brake drumbrake drum, , return spring return spring and and an an automatic or self adjusting automatic or self adjusting systemsystem杀法魔闽希换洼叶绍单协迫淘润篷萍障滴伯早险彻侯诫苗昼矩眯辱钧纶亏汽车专业外语052ppt课件汽车专业外语052ppt课件Passage BPassage BBra
24、ke system ()lTypical brake system components:Typical brake system components:1.Master cylinderMaster cylinder2.Brake lines and brake hosesBrake lines and brake hoses3.Brake fluidBrake fluid4.Shoes and padsShoes and padsBrake system漫蕉哪废膛构布鄂疙筷屿月败壹嚣徊矾虾矛华仆饼镜量忍无纲边昌隔聂涕汽车专业外语052ppt课件汽车专业外语052ppt课件Passage B
25、Passage BBrake system ()lLocated in engine Located in engine compartmentcompartment on the firewall, on the firewall, directly in front of the drivers seat.directly in front of the drivers seat.lTwo completely separate master cylinder, each Two completely separate master cylinder, each handling two
26、wheels.handling two wheels.Master cylinderhttp:/ one side fails, you will still If one side fails, you will still be able to stop the car.be able to stop the car.lThe most common problem The most common problem is an internal leak.is an internal leak.肠初聂括偶盖硒办酚司奋渍船沸耘轻胃蛹翟袖册调扣赢着厅钙峭诚闻琐懂汽车专业外语052ppt课件汽车专
27、业外语052ppt课件Passage BPassage BBrake system ()lThe brake fluid travels from the master cylinder to The brake fluid travels from the master cylinder to the wheel brake through a series of the wheel brake through a series of steel tubes steel tubes and and reinforced rubber hosesreinforced rubber hoses.
28、 .lRubber hoses are only used in places that require Rubber hoses are only used in places that require flexibility, such as front wheel.flexibility, such as front wheel.lNon-corrosive Non-corrosive seamless steel seamless steel tubing with special tubing with special fitting is used in all rest atta
29、chment points.fitting is used in all rest attachment points.lReplace the complete line if needed, and do not Replace the complete line if needed, and do not use the brass compression fittings or copper tubing.use the brass compression fittings or copper tubing.Brake lines and brake hoses:桃恃便受帖合摩赶攻判粟
30、寐嗜篙仙碑凝格帜春艇悍旦症换遁哭陋步役茫壹汽车专业外语052ppt课件汽车专业外语052ppt课件Passage BPassage BBrake system ()lA special oil that has special properties.A special oil that has special properties.lWithstand cold Temp. without thickening as well as Withstand cold Temp. without thickening as well as very high Temp. without boilin
31、g.very high Temp. without boiling.lTransparent reservoir is used to easily check the Transparent reservoir is used to easily check the fluid level. Slightly decreasing of the level is a fluid level. Slightly decreasing of the level is a normal condition as the brake pads wear. normal condition as th
32、e brake pads wear. lNever let the level goes down to below the Never let the level goes down to below the two two thirds fullthirds full. And keep the reservoir covered except . And keep the reservoir covered except for the time you need to fill it.for the time you need to fill it.Brake fluid宅紫伊鸟展乌痉
33、钢链拘慌务弄朽耐箱耕饥此儿渭爽羽晚臣坊柿霸经卒硼酵汽车专业外语052ppt课件汽车专业外语052ppt课件Passage BPassage BBrake system ()lAmplify the available foot pressure applied to the Amplify the available foot pressure applied to the brake pedal.brake pedal.lPower for the booster comes from engine vacuum.Power for the booster comes from engine
34、 vacuum.lVacuum enters the booster through a Vacuum enters the booster through a check valvecheck valve, , which is connected to the engine with a rubber which is connected to the engine with a rubber hose and acts as a one-way valve that allows the hose and acts as a one-way valve that allows the v
35、acuum to enter the booster but does not let it vacuum to enter the booster but does not let it escape.escape.Booster氓科粘漫睬妄塑轴君嵌恍彬甄庶缕况值绅谅郁驯腹趣义督勒韩伏耙卤盼胚汽车专业外语052ppt课件汽车专业外语052ppt课件Passage APassage ANew words （生词）1.1. Compartment Compartment2.2. Firewall Firewall3.3. Power-assisted Power-assisted4.4. Ale
36、rt Alert5.5. Rarely Rarely6.6. Malfunction Malfunction7.7. Reinforce Reinforce8.8. Non-corrosive Non-corrosive9.9. Seamless Seamless10.10. Fitting Fitting11.11. Illegal Illegal12.12. Spongy Spongy13.13. Transparent Transparent14.14. By-product By-product15.15. Be composed of Be composed of16.16. Hyd
37、raulic pressure Hydraulic pressure17.17. Amplify Amplify18.18. Engine compartment Engine compartment19.19. Power brake booster Power brake booster20.20. Brake warning light Brake warning light21.21. Two thirds full Two thirds full帮蓖赚埂粹楷浑忽峪携纂娠编养鱼玖烧鸿澳亭财轮苔说涸毁誓拾凡辆痪雌汽车专业外语052ppt课件汽车专业外语052ppt课件西华大学XIHUA
38、UNIVERSITYXIHUA UNIVERSITY交通与汽车工程学院交通与汽车工程学院Faculty of Faculty of Transportation and Transportation and Automotive EngineeringAutomotive Engineering Homework1.Review the new words and expressions2.Exercise 3,5,6渐缅判友烽池卡待棕事黎斯莹祁丈午沪惯曲髓书栗花犀菜嫁社肿镜阉乍畦汽车专业外语052ppt课件汽车专业外语052ppt课件西华大学XIHUA UNIVERSITYXIHUA UNIVERSITY交通与汽车工程学院交通与汽车工程学院Faculty of Faculty of Transportation and Transportation and Automotive EngineeringAutomotive Engineering Thanks奥豢阉坤睁宿介朱皇蜗椽吃侈宦吹凶份峪贤悔被替簿官工段绩述烘共鼎斟汽车专业外语052ppt课件汽车专业外语052ppt课件
