同济大学：《汽车构造》课程电子教案（课件讲稿）Chapter 24 制动系统 Braking system

Chapter 24 Braking system 同©大学 TONGII UNIVERSTTY Chapter 24 Braking System

Chapter 24 Braking system Chapter 24 Braking System

Chapter 24 Braking system 窗月桥大学 TONGII UNIVERSTTY Main Contents >Working Prineiple of Braking System: >Composition of Braking System: >Types of Braking System: >Types ,Characteristics &Application of Drum Brake Dise Brake: >Operation Method of Braking System; >Function Working Principle of Braking Force Regulator

Chapter 24 Braking system Main Contents Working Principle of Braking System； Composition of Braking System； Types of Braking System； Types ,Characteristics & Application of Drum Brake & Disc Brake； Operation Method of Braking System； Function & Working Principle of Braking Force Regulator

Chapter 24 Braking system 同©大学 TONGII UNIVERSTTY 1 Summary halt brake pipe vehicle braking booster brake tensile halt vehicle brake master cylinder front brake discs abrasion display brake clip piston halt vehicle brake tablets friction disc brake discs Schematic Diagram of Braking System

Chapter 24 Braking system 1 Summary

Chapter 24 Braking system 同©大学 TONGII UNIVERSTTY Function of Braking System and Braking Force >Decelerate or Stop the moving vehicle; >Park the vehicle; >Braking force >Keep a steady velocity while downhill. >The forces can decelerate the vehicle:Rolling resistance Ramp >Not braking force resistance Air resistance. >Braking Force:Generated by the driver's manipulation,a certain force from road to the wheel opposite to the vehicle's driving direction forced by the driver's control

Chapter 24 Braking system Function of Braking System and Braking Force Braking force Decelerate or Stop the moving vehicle； Park the vehicle； Keep a steady velocity while downhill 。 The forces can decelerate the vehicle: Rolling resistance、Ramp resistance、Air resistance. Not braking force Braking Force: Generated by the driver’s manipulation，a certain force from road to the wheel opposite to the vehicle’s driving direction forced by the driver’s control

Chapter 24 Braking system 窗月桥大学 TONGII UNIVERSITY Definition of Braking System >A set of device can generates and controls the braking force

Chapter 24 Braking system Definition of Braking System A set of device can generates and controls the braking force

Chapter 24 Braking system 同©大学 TONGII UNIVERSTTY Working Principle of Braking System >Main Structure 1 Brake pedal、2 Push rod、3 Piston of 8 master cylinder4 Master cylinder、5 Braking pipe、6 M Wheel cylinder,7 Piston of wheel cylinder,8 brake drum 9 friction discs 10 Braking shoe、11 Braking plate、1l2 Rest pin,13 Brake shoe return spring etc. 欢网

Chapter 24 Braking system Working Principle of Braking System Main Structure ： 1 Brake pedal、2 Push rod、3 Piston of master cylinder 、 4 Master cylinder、5 Braking pipe、6 Wheel cylinder 、 7 Piston of wheel cylinder、8 brake drum、 9 friction discs 、 10 Braking shoe 、 11 Braking plate 、 12 Rest pin、13 Brake shoe return spring etc

Chapter 24 Braking system 同©大学 TONGII UNIVERSTTY Working Principle of Braking System the force of brake paddle >The brake shoe generates a brake paddle CONTINUOUS friction torque to brake drum BRAKE Master Cylinder BRAKE called M EXPAND braking >M makes the wheel produce a force of the Wheel Cylinder brake force forward to the road called braking brake foree of F,at the same time the road the brake produces a backward force to the wheel called Fg >FB:braking force from road to wheel,the bigger it is,the bigger the deceleration is. Working Principle of Braking System >Working principle of braking system: >Influence factors:Mu and road conditions

Chapter 24 Braking system The brake shoe generates a friction torque to brake drum called Mμ。 FB : braking force from road to wheel, the bigger it is, the bigger the deceleration is. Working Principle of Braking System Working principle of braking system: Mμ makes the wheel produce a force forward to the road called Fμ，at the same time the road produces a backward force to the wheel called FB Influence factors：Mμ and road conditions

Chapter 24 Braking system 同©大学 TONGII UNIVERSITY Composition of Braking System >Braking System:brake braking handle drum brake brake drive mechanism。 vaccum assistor brake master cylinder Pad dle >BrakeBrake Shoe disc brake Friction Discs Brake Drum etc also includes Sustained Speed Device in the Auxiliary braking system. paddle support Braking System of Santana >Brake Drive Mechanism:Energy Device,Control Device,Driving Device Braking force adjustor Warning device Pressure protection device etc

Chapter 24 Braking system Composition of Braking System Braking System: brake & brake drive mechanism 。 Brake Drive Mechanism: Energy Device、Control Device、Driving Device 、 Braking force adjustor & Warning device 、 Pressure protection device etc. Brake——Brake Shoe 、 Friction Discs、Brake Drum etc， also includes Sustained Speed Device in the Auxiliary braking system

Chapter 24 Braking system 同©大学 TONGII UNIVERSITY Composition of Braking System >Energy Device-devices that master cylinder can supply,adjust braking energy vaccum assistor &improve the state of】 medium. dise brake front whee braking brake paddle energy-the part mechanism generate braking energy also drum brake rear wheel) brake valv includes people's body. brake war可 light >Control Device-parts generate braking motion control braking Composition of Braking System effect e.g.braking pad,brake valves etc. >A relatively perfect braking >Drive Device-delivers braking system should have a braking energy to the parts in brake,e.g. force adjustor, warning device master cylinder,wheel cylinder. and pressure protection device etc

Chapter 24 Braking system Composition of Braking System Energy Device—devices that can supply, adjust braking energy & improve the state of medium. braking energy—the part generate braking energy ， also includes people’s body. Control Device—parts generate braking motion & control braking effect e.g. braking pad, brake valves etc. Drive Device—delivers braking energy to the parts in brake, e.g. master cylinder, wheel cylinder. A relatively perfect braking system should have a braking force adjustor, warning device and pressure protection device etc

Chapter 24 Braking system TONGII UNIVERSTTY Types of Braking System According to the function of >Decelerating or Stopping the moving vehicle the system >Parking the vehicle >Driving braking system >Parking braking system >Decelerating or Stopping the moving vehicle >Second braking system when the driving braking system goes wrong >Auxiliary braking system >Keeping a steady velocity while downhill According to the braking >Driver's human resource as input energy energy >Completely relys on the power of the engine >Human braking system transformed into the air or hydraulic braking system >Dynamic braking system >Servo braking system >Both driver's human resource and engine's power

Chapter 24 Braking system Types of Braking System According to the function of the system Driving braking system Parking braking system Second braking system Auxiliary braking system According to the braking energy Human braking system Dynamic braking system Servo braking system Decelerating or Stopping the moving vehicle Parking the vehicle Decelerating or Stopping the moving vehicle when the driving braking system goes wrong Keeping a steady velocity while downhill Driver’s human resource as input energy Completely relys on the power of the engine transformed into the air or hydraulic braking system Both driver’s human resource and engine’s power