PROFESSIONAL ENGLISH UNIT 10 BRAKING SYSTEMS TEXTA Basic Braking System and ABS
UNIT 10 BRAKING SYSTEMS TEXT A Basic Braking System and ABS PROFESSIONAL ENGLISH
本次课学习内容 UnIT 8 Basic Braking System and ABs TEXTA Basic operating principle of the hydraulic system ● Disc brakes ● Drum brakes ABS Components Operating principle o Types of Anti-Lock Brakes
UNIT 8 Basic Braking System and ABS TEXT A Basic operating principle of the hydraulic system • Disc brakes • Drum brakes • ABS • Components • Operating principle • Types of Anti-Lock Brakes 本次课学习内容
本次课学习目标 ●掌握制动系统的有关英文专业词汇 ●掌握制动系统主要部件工作原理 ●训练快速阅读能力,提高阅读速度
本次课学习目标 ⚫ 掌握制动系统的有关英文专业词汇 ⚫ 掌握制动系统主要部件工作原理 ⚫ 训练快速阅读能力，提高阅读速度
NEW WORDS kinetic [ kinetik]a(运)动的动力(学)的 reservolr [' rewA:]n水库,蓄水池 caliper [ kaelin]n卡钳,测径器;v用卡钳测量 withdraw wio'dr:]v.缩回,收回,退出 phonograph[" feunegra:n电唱机,留声机 fade [feid] v(声音等)减弱下去衰减, 枯萎,凋谢 inherently[in"hi。 rant ad天性地,固有地 lump [lAmp] V使成块状混在一起 lining [" laini]n衬里,内层,衬套
NEW WORDS kinetic [kai'netik] a.(运)动的, 动力(学)的 reservoir ['rezəvwɑ:] n.水库, 蓄水池 caliper ['kæ lipə] n.卡钳, 测径器；v.用卡钳测量 withdraw [wið 'drɔ:] v. 缩回, 收回, 退出 phonograph ['fəunəgrɑ: f] n.电唱机, 留声机 fade [feid] v.(声音等)减弱下去, 衰减， 枯萎, 凋谢 inherently [in'hiərəntl i] ad.天性地, 固有地 lump [lʌmp] v.使成块状, 混在一起 lining ['lainiŋ] n.衬里, 内层, 衬套
nerve [na:vraekin] a(nerve-racking) wrackIng 极端令人头疼的,非常伤脑筋的 magnetize [ maegnitaiz]v使磁化吸引 magnetic [ magneti]a磁的,有磁性的,有吸引力的 deceleration[di;sel'rei∫n减速 en algorithm [' aelgeridam]n[数]运算法则,算法 scheme [ski:m] n方案,安排,配置,计划 T-fitting ["ti:fiti]nT型管接头
nervewracking ['nə:v ֽ ræ kiŋ] a.(=nerve-racking) 极端令人头疼的, 非常伤脑筋的 magnetize ['mæ gnitaiz] v.使磁化, 吸引 magnetic [mæ g'netik] a.磁的, 有磁性的, 有吸引力的 deceleration [di:ֽ selə'rei∫ ən] n.减速 algorithm ['æ lgəriðəm] n.[数]运算法则，算法 scheme [ski:m] n.方案, 安排, 配置, 计划 T-fitting ['ti:fitiŋ] n.T型管接头
PHRASES AND EXPRESSIONS service braking行车制动 parking braking驻车制动 retarder braking缓速制动 fluid reservoir储液室 wheel cylinder轮缸 master cylinder主缸 drum brake 鼓式制动器 disc brake 盘式制动器 in a hurry 匆忙
PHRASES AND EXPRESSIONS service braking 行车制动 parking braking 驻车制动 retarder braking 缓速制动 fluid reservoir 储液室 wheel cylinder 轮缸 master cylinder 主缸 drum brake 鼓式制动器 disc brake 盘式制动器 in a hurry 匆忙
inductive sensor感应式传感器 magnetic field 磁场 integral with 与,成一体 line pressure 管路压力,主油路压力 dash panel 仪表板 instrument pane仪表板 hydraulic unit 液压单元 hydraulic actuator液压执行器
inductive sensor 感应式传感器 magnetic field 磁场 integral with 与…成一体 line pressure 管路压力，主油路压力 dash panel 仪表板 instrument panel 仪表板 hydraulic unit 液压单元 hydraulic actuator 液压执行器
Basic Braking System and ABS In order to reduce the speed of the vehicle the brakes have to convert the kinetic energy stored in the vehicle to heat energy. a braking system consists of an energy-supplying device, a control device a transmission device and the brake Today there are three types of braking systems in use service braking system, parking braking system and additional retarder braking system. The service braking system and the parking braking system have separate control and transmission devices. The service braking system is normally foot-operated while the parking braking system is hand operated Basic operating principle of the hydraulic system Hydraulic systems are used to actuate the brakes of all small cars. The system transports the power required to force the frictional surfaces of the braking system together from the pedal to the individual brake units at each wheel
Basic Braking System and ABS In order to reduce the speed of the vehicle, the brakes have to convert the kinetic energy stored in the vehicle to heat energy. A braking system consists of an energy-supplying device, a control device, a transmission device and the brake. Today, there are three types of braking systems in use: service braking system, parking braking system and additional retarder braking system. The service braking system and the parking braking system have separate control and transmission devices. The service braking system is normally foot-operated, while the parking braking system is handoperated. Basic operating principle of the hydraulic system Hydraulic systems are used to actuate the brakes of all small cars. The system transports the power required to force the frictional surfaces of the braking system together from the pedal to the individual brake units at each wheel
The master cylinder consists of a fluid reservoir and a double cylinder and piston assembly. double type master cylinders are designed to separate the front and rear braking systems hydraulically in case of a leak Steel lines carry the brake fluid to a point on the vehicle frame near each of the vehicles wheels the fluid is then carried to the calipers and wheel cylinders by flexible tubes in order to allow for suspension and steering movements The hydraulic system operates as follows When at rest the entire system, from the piston(s) in the master cylinder to those in the wheel cylinders or calipers, is full of brake fluid Upon application of the brake pedal, fluid trapped in front of the master cylinder piston (s) is forced through the lines to the wheel cylinders. here it forces the pistons outward in the case of drum brakes and inward toward the disc, in the case of disc brakes. The motion of the pistons is opposed by return springs mounted outside the cylinders in drum brakes and by spring seals, in disc brakes
The master cylinder consists of a fluid reservoir and a double cylinder and piston assembly. Double type master cylinders are designed to separate the front and rear braking systems hydraulically in case of a leak. Steel lines carry the brake fluid to a point on the vehicle frame near each of the vehicles wheels. The fluid is then carried to the calipers and wheel cylinders by flexible tubes in order to allow for suspension and steering movements. The hydraulic system operates as follows: When at rest, the entire system, from the piston(s) in the master cylinder to those in the wheel cylinders or calipers, is full of brake fluid. Upon application of the brake pedal, fluid trapped in front of the master cylinder piston(s) is forced through the lines to the wheel cylinders. Here, it forces the pistons outward, in the case of drum brakes, and inward toward the disc, in the case of disc brakes. The motion of the pistons is opposed by return springs mounted outside the cylinders in drum brakes, and by spring seals, in disc brakes
Upon release of the brake pedal, a spring located inside the master cylinder immediately returns the master cylinder pistons to the normal position The pistons contain check valves and the master cylinder has compensating ports drilled in it. These are uncovered as the pistons reach their normal position. the piston check valves allow fluid to flow toward the wheel cylinders or calipers as the pistons withdraw. Then, as the return springs force the brake pads or shoes into the released position the excess fluid reservoirs through the compensating ports. It is during the time the pedal is in the released position that any fluid that has leaked out of the system will be replaced through the compensating ports [1] Dual circuit master cylinders employ two pistons located one behind the other, in the cylinder. The primary piston is actuated directly by mechanical linkage from the brake pedal through the power booster. The secondary piston is actuated by fluid trapped between the two pistons
Upon release of the brake pedal, a spring located inside the master cylinder immediately returns the master cylinder pistons to the normal position. The pistons contain check valves and the master cylinder has compensating ports drilled in it. These are uncovered as the pistons reach their normal position. The piston check valves allow fluid to flow toward the wheel cylinders or calipers as the pistons withdraw. Then, as the return springs force the brake pads or shoes into the released position, the excess fluid reservoirs through the compensating ports. It is during the time the pedal is in the released position that any fluid that has leaked out of the system will be replaced through the compensating ports [1]. Dual circuit master cylinders employ two pistons, located one behind the other, in the cylinder. The primary piston is actuated directly by mechanical linkage from the brake pedal through the power booster. The secondary piston is actuated by fluid trapped between the two pistons
