同济大学：《汽车构造》课程电子教案（课件讲稿）Chapter 19 传动装置 Running Gear

Chapter 19 Running Gear 同©大学 TONGII UNIVERSTTY Chapter 19 Running Gear

Chapter 19 Running Gear Chapter 19 Running Gear

Chapter 19 Running Gear 窗月桥大学 TONGII UNIVERSITY Main Contents >The components and function of running gear; >The influence of the counter-torque,which caused by the driving force,on the front and rear vertical wheel load; >The structure type of running gear

Chapter 19 Running Gear The components and function of running gear; The influence of the counter-torque, which caused by the driving force, on the front and rear vertical wheel load; The structure type of running gear Main Contents

Chapter 19 Running Gear 同©大学 TONGII UNIVERSITY The function of running gear >To receive the torque from the engine and produce driving force caused by the tire's adhesion to the road surface,in order to ensure the normal driving conditions; >To transmit and receive forces and torques from the wheels; >To mitigate impacts from the road surface,dampen the vibration and ensure the ride comfort of vehicles; >Co-operating with the steering system,to achieve the correct control of the direction of travel and ensure the handling stability of vehicles; >Co-operating with the braking system,to ensure the braking behavior of vehicles

Chapter 19 Running Gear The function of running gear To receive the torque from the engine and produce driving force caused by the tire’s adhesion to the road surface, in order to ensure the normal driving conditions； To transmit and receive forces and torques from the wheels； To mitigate impacts from the road surface，dampen the vibration and ensure the ride comfort of vehicles； Co-operating with the steering system, to achieve the correct control of the direction of travel and ensure the handling stability of vehicles； Co-operating with the braking system, to ensure the braking behavior of vehicles

Chapter 19 Running Gear 同©大学 TONGII UNIVERSTTY The components of running gear >Frame:to provide a supporting body for assemblies, fasten all main parts and units of the vehicle and withstand the static and dynamic loads >Axle:to connect the left and right wheels,receive and transmit forces and torques from the wheels >Wheel (or track):to support the vehicle,connect the vehicle body and road,mitigate impacts from the road surface,produce driving force,braking force,create the lateral force and aligning torque while steering and improve the passing ability of vehicle >Suspension:to transmit the forces and torques from the wheels to frame,dampen the vibration via the springs, dampers and connecting link,improve the handling stability and ride comfort of vehicles

Chapter 19 Running Gear Frame：to provide a supporting body for assemblies, fasten all main parts and units of the vehicle and withstand the static and dynamic loads The components of running gear Axle：to connect the left and right wheels, receive and transmit forces and torques from the wheels Wheel（or track）：to support the vehicle, connect the vehicle body and road, mitigate impacts from the road surface, produce driving force, braking force, create the lateral force and aligning torque while steering and improve the passing ability of vehicle Suspension: to transmit the forces and torques from the wheels to frame, dampen the vibration via the springs, dampers and connecting link, improve the handling stability and ride comfort of vehicles

Chapter 19 Running Gear 同大学 TONGII UNIVERSTTY The components of running gear Running SABADA gear

Chapter 19 Running Gear Running gear The components of running gear

Chapter 19 Running Gear 同©大学 TONGII UNIVERSTTY The components of running gear running gear

Chapter 19 Running Gear running gear The components of running gear

Chapter 19 Running Gear 窗月桥大学 TONGII UNIVERSTTY The structure type of running gear wheeled running gearI >half-tracked running gear >tracked running gear >wheel-tracked running gear

Chapter 19 Running Gear The structure type of running gear wheeled running gear half-tracked running gear tracked running gear wheel—tracked running gear

Chapter 19 Running Gear 窗月桥大学 TONGII UNIVERSTTY Wheeled vehicles

Chapter 19 Running Gear Wheeled vehicles

Chapter 19 Running Gear 同©大学 TONGII UNIVERSTTY The power transmission of wheeled running ger- 前悬架 车架 后悬架驱动桥 前进方向 Ga )后轮 从动桥 前轮 Z Z 轮式汽车行驶系统的组成及部分受力分析 >The gravity of the vehicle:Ga >The supporting force at the front Ga-Zr+Z2 and rear wheel:Zl、Z2 >The driving torque M >The driving force Ft

Chapter 19 Running Gear The power transmission of wheeled running gear The gravity of the vehicle：Ga The supporting force at the front and rear wheel：Z1、Z2 Ga=Z1+Z2 The driving torque ：Mk The driving force ：Ft

Chapter 19 Running Gear 同©大学 TONGII UNIVERSTTY The power transmission of wheeled running gear 前悬架 车架 后悬架驱动桥 前进方向 后轮 从动桥 前轮 Z Z 轮式汽车行驶系统的组成及部分受力分析 F=F,+F+Fs+Fa >Rolling resistance >Climbing resistance Fs >Air resistance FI > Inertial resistance Fa

Chapter 19 Running Gear Rolling resistance Fr Ft=Fr+Fl+Fs+Fa Air resistance Fl Climbing resistance Fs  Inertial resistance Fa The power transmission of wheeled running gear