同济大学：《汽车构造》课程电子教案（课件讲稿）Chapter 25 车身 Car body

Chapter 25 Car body 同©大学 TONGII UNIVERSTTY Chapter 25:Car Body

Chapter 25 Car body Chapter 25: Car Body

Chapter 25 Car body 同©大学 TONGII UNIVERSTTY Overview 行李箱 驾乘室 发动机室 三厢车型 行李箱+驾乘室 发动机室 两厢车型

Chapter 25 Car body Overview

Chapter 25 Car body 同©大学 TONGII UNIVERSTTY Definition and requirements of frame > Body is where a driver works and where accommodates passengers and cargos.(It is a part of vehicle besides 后的 engine and chassis). 前轮距 车宽含后视镜 >It should meet the needs of ride comfort,operation convenience and passive safety.It should keep the completeness of cargos. 轴距 后和 车身总长 It should have high aerodynamic performance,high riding stability and good thermal environment. >Meet the artistic needs of inside and outside automobile design, decoration and color

Chapter 25 Car body  It should meet the needs of ride comfort, operation convenience and passive safety. It should keep the completeness of cargos.  It should have high aerodynamic performance, high riding stability and good thermal environment.  Meet the artistic needs of inside and outside automobile design, decoration and color. Definition and requirements of frame  Body is where a driver works and where accommodates passengers and cargos. (It is a part of vehicle besides engine and chassis)

Chapter 25 Car body 蜀日海大学 TONGII UNIVERSTTY Main functions of body >It should provide drivers with good operating condition and comfort working environment; It should isolate vibration,noise,waste gas and harsh climate and provide passengers with comfort riding environment; >It should keep the completeness of cargo and make them easy to load and unload; The structure of body and its equipment should ensure the safety of driving and reduce the influence of an incident. The reasonable outer shape of body can effectively steer the surrounding current and should improve the dynamic characteristics,fuel economy and driving stability.It should also improve the cooling condition of engine and ventilation inside the cab

Chapter 25 Car body Main functions of body  It should provide drivers with good operating condition and comfort working environment;  It should isolate vibration, noise, waste gas and harsh climate and provide passengers with comfort riding environment;  It should keep the completeness of cargo and make them easy to load and unload;  The structure of body and its equipment should ensure the safety of driving and reduce the influence of an incident.  The reasonable outer shape of body can effectively steer the surrounding current and should improve the dynamic characteristics, fuel economy and driving stability. It should also improve the cooling condition of engine and ventilation inside the cab

Chapter 25 Car body 同©大学 TONGII UNIVERSTTY Related Terminology >The structure of body includes body shell,front sheet metal, doors,windows,exterior automotive decorative trim,interior trimming parts,seats,ventilator,heater,air-conditioning system and so on.There should also be cargo body and other equipment on truck and special purpose vehicle. >Car body includes BIW(body in white),exterior trim,interior trim and electric accessories. >BIW(body in white):all kinds of white body that are welded and assembled and ready to do coating.It include body welded assembly,closure,fender and so on. >Body welded assembly includes floor,bonnet,front bulkhead, rear bulkhead,side wall and so on

Chapter 25 Car body Car body includes BIW(body in white), exterior trim, interior trim and electric accessories. BIW(body in white): all kinds of white body that are welded and assembled and ready to do coating. It include body welded assembly, closure, fender and so on. Body welded assembly includes floor, bonnet, front bulkhead, rear bulkhead, side wall and so on. Related Terminology The structure of body includes body shell, front sheet metal, doors, windows, exterior automotive decorative trim, interior trimming parts, seats, ventilator, heater, air-conditioning system and so on. There should also be cargo body and other equipment on truck and special purpose vehicle

Chapter 25 Car body 同©大学 TONGII UNIVERSTTY Related Terminology >Exterior automotive decorative trim is an accessory that protects the body,decorates the body and achieves certain function.It includes front and rear bumper,decoration,seal strip,rear view mirror,radiator grill,sun roof,spoiler plate and so on. >Interior trimming parts are accessories that protect human, decorate the body and achieve certain function.It includes dashboard,seat,seat belt,bumping bag,sun visor,rear view mirror,door,floor decoration and so on. >Electric accessories are all electric and electronic devices except those for engine and chassis.It includes gauge,switch, illumination,CAS(Car audio system),air conditioner,wiper, washer,defrost,theft deterrent and GPS system

Chapter 25 Car body Exterior automotive decorative trim is an accessory that protects the body, decorates the body and achieves certain function. It includes front and rear bumper, decoration, seal strip, rear view mirror, radiator grill, sun roof, spoiler plate and so on. Interior trimming parts are accessories that protect human, decorate the body and achieve certain function. It includes dashboard, seat, seat belt, bumping bag, sun visor, rear view mirror, door, floor decoration and so on. Electric accessories are all electric and electronic devices except those for engine and chassis. It includes gauge, switch, illumination, CAS(Car audio system), air conditioner, wiper, washer, defrost, theft deterrent and GPS system. Related Terminology

Chapter 25 Car body 同桥大学 TONGII UNIVERSTTY Section 1:Body shell,front sheet metal,door,and window 顶盖 后风窗框上横梁 前风窗框上横梁 一上边 后窗台板后围板 前风窗框下横梁 前围板 后立柱(C柱) 散热器框架 后翼板 后轮罩 后纵梁 地板后横梁 后地板 前纵梁 横梁前地板)中立柱(B柱) 前挡泥板前座椅 前立柱(A柱) 前横梁 副车架 地板通道 前挡泥板加强撑 捷达轿车的车身壳体

Chapter 25 Car body Section 1: Body shell, front sheet metal, door, and window

Chapter 25 Car body 日儕大学 TONGII UNIVERSTTY Body shell >Body shell is a rigid structural space formed by load- bearing units as longerons,cross beams,pillars and plates connecting them. Most bus bodies have obvious frames,but sedan bodies and cabs of trucks have no obvious frames

Chapter 25 Car body Body shell is a rigid structural space formed by load￾bearing units as longerons, cross beams, pillars and plates connecting them.  Most bus bodies have obvious frames, but sedan bodies and cabs of trucks have no obvious frames. Body shell

Chapter 25 Car body 同©大学 TONGII UNIVERSTTY Requirements for body shell >Body shell must have sufficient and reasonable strength,static and dynamic stiffness and passive safety. >Insufficient stiffness will cause relative deformation of mounting parts such as door frame and power train.Also,it will make relative assembly fail to work properly. >Unreasonable active stiffness will lead to resonance and noise which will shorten the fatigue life of body structure. >Passive safety is the main guarantee that meets or surpasses the requirements of relative laws and regulations

Chapter 25 Car body Requirements for body shell Body shell must have sufficient and reasonable strength, static and dynamic stiffness and passive safety. Insufficient stiffness will cause relative deformation of mounting parts such as door frame and power train. Also, it will make relative assembly fail to work properly. Unreasonable active stiffness will lead to resonance and noise which will shorten the fatigue life of body structure. Passive safety is the main guarantee that meets or surpasses the requirements of relative laws and regulations

Chapter 25 Car body 同©大学 TONGII UNIVERSTTY Classification of body shell >Classification of body shell can be sorted as monocoque,composite and semi-integral body. >Monocoque body has no frame.The body itself is the basal body to install engine and chassis.the body functions as frame and all the forces is supported by the body >Composite body is connected to frame through flexible connection by rubber cushion or spring.Frame is the basic part to support the whole car and bears all loads of all assemblies mounted on it.The body only bears the weight of passengers and cargos and inertia force. When we design the frame,we don't take the supplementary role of body that helps frame bear weight into consideration. >semi-integral body is connected to frame through rigid connection such as welding,riveting or screwing.Frame is the main part to bear all loads of assemblies.The body to some extent helps firm the frame and bears part of loads

Chapter 25 Car body Classification of body shell can be sorted as monocoque, composite and semi-integral body. Monocoque body has no frame. The body itself is the basal body to install engine and chassis. the body functions as frame and all the forces is supported by the body Classification of body shell Composite body is connected to frame through flexible connection by rubber cushion or spring. Frame is the basic part to support the whole car and bears all loads of all assemblies mounted on it. The body only bears the weight of passengers and cargos and inertia force. When we design the frame, we don’t take the supplementary role of body that helps frame bear weight into consideration. semi-integral body is connected to frame through rigid connection such as welding, riveting or screwing. Frame is the main part to bear all loads of assemblies. The body to some extent helps firm the frame and bears part of loads