同济大学：《汽车构造》课程电子教案（课件讲稿）Chapter 15 变速箱 Transmission and transfer case

Chapter 15 Transmission and transfer case 同©大学 TONGII UNIVERSTTY Chapter 15 Transmission and Transfer Case

Chapter 15 Transmission and transfer case Chapter 15 Transmission and Transfer Case

Chapter 15 Transmission and transfer case 圖月儕大学 TONGII UNIVERSTTY Main contents >Components of transmission, Functions,Types; >Speed-change driving mechanism; >Synchronizers >Shifing operation mechanism; >Transfer case

Chapter 15 Transmission and transfer case Main contents Components of transmission, Functions, Types; Speed-change driving mechanism; Synchronizer; Shifting operation mechanism; Transfer case

Chapter 15 Transmission and transfer case 窗同海大学 Components of transmission,Function of transmission,Classification; Components of transmission >Transmission is composed of speed-change driving mechanism and shifting operation mechanism. Function of transmission >It's used to change gear ratio and expand the range of torque and rotating speed of driving wheels to adapt to working condition and make the engine work in high efficiency area. >Achieve the function of reverse running; >The use of neutral gear can interrupt power delivery, so that the engine can start,idle and the transmission easy to shift gear or to output power

Chapter 15 Transmission and transfer case It’s used to change gear ratio and expand the range of torque and rotating speed of driving wheels to adapt to working condition and make the engine work in high efficiency area. Achieve the function of reverse running; The use of neutral gear can interrupt power delivery, so that the engine can start, idle and the transmission easy to shift gear or to output power. Components of transmission, Function of transmission, Classification; Components of transmission Function of transmission Transmission is composed of speed-change driving mechanism and shifting operation mechanism

Chapter 15 Transmission and transfer case 日傍大学 TONGII UNIVERSITY Classification Sorted by the range of ratio: >The most widely used type.It has several fixed >Gear wheel type ratios and can be sorted as fixed axis type and rotary axis type.The number of transmission is the number of forward gears. >Continuously >Gear ratio can be continually changed in a variable transmission certain range and sorted as electric and hydraulic type. >Hydraulic- >It's formed by a hydrodynamic converter and a mechanical type gear gear wheel type transmission.The gear ratio can be continually changed in several separated areas. box

Chapter 15 Transmission and transfer case Sorted by the range of ratio: Gear wheel type Continuously variable transmission Hydraulic￾mechanical type gear box Classification The most widely used type. It has several fixed ratios and can be sorted as fixed axis type and rotary axis type. The number of transmission is the number of forward gears. Gear ratio can be continually changed in a certain range and sorted as electric and hydraulic type. It’s formed by a hydrodynamic converter and a gear wheel type transmission. The gear ratio can be continually changed in several separated areas

Chapter 15 Transmission and transfer case 窗月桥大学 TONGII UNIVERSITY Classification Sorted by maneuverability pattern: >Manual >>The driver directly manipulates the gear operating type lever to shift gear. >Automatic Gear shifting a and ratio selection is operating type automatically operated. >Fixed type:several commonly used gears are automatically shifted and the others >Semi-Automatic manipulated by the driver. operating type >Preselector type:select the gear first and automatically shift gear

Chapter 15 Transmission and transfer case Sorted by maneuverability pattern: Manual operating type Automatic operating type Semi-Automatic operating type Classification The driver directly manipulates the gear lever to shift gear.  Gear shifting and ratio selection is automatically operated. Fixed type: several commonly used gears are automatically shifted and the others manipulated by the driver. Preselector type: select the gear first and automatically shift gear

Chapter 15 Transmission and transfer case 月傍大学 Section 1 Speed-change driving mechanism 换档废叉 换档拉村

Chapter 15 Transmission and transfer case Section 1 Speed-change driving mechanism

Chapter 15 Transmission and transfer case 圖月儕大学 TONGII UNIVERSTTY Speed-change driving mechanism /Adobe Flash Player 10 日回☒ 文件)查看控制C)超助

Chapter 15 Transmission and transfer case Speed-change driving mechanism

Chapter 15 Transmission and transfer case 同©大学 TONGII UNIVERSTTY Classification of speed-change driving mechanism General gear box >Fixed axis gear box is normally called normal gear box. Combined transmission >It's main component is one or two transmissions,and uses different gear pairs or splitters(sub-transmissions)to achieve a serial of transmissions of different number of speeds and different range of gear ratio

Chapter 15 Transmission and transfer case General gear box Fixed axis gear box is normally called normal gear box. Combined transmission It’s main component is one or two transmissions, and uses different gear pairs or splitters(sub-transmissions) to achieve a serial of transmissions of different number of speeds and different range of gear ratio. Classification of speed-change driving mechanism

Chapter 15 Transmission and transfer case @ 同©大学 TONGII UNIVERSTTY Classification of speed-change driving mechanism >Sorted by the number of fix axis type:twin-shaft transmission and three-shaft transmission Twin-shaft transmission >Two kinds of axes:input shaft(clutch shaft),output shaft(main shaft) 第，轴 空档 第二轴 Power drive path >Input shaft-Gear of input shaft-Gear of output shaft-Output shaft

Chapter 15 Transmission and transfer case Two kinds of axes: input shaft (clutch shaft), output shaft(main shaft) Sorted by the number of fix axis type: twin-shaft transmission and three-shaft transmission Twin-shaft transmission Power drive path Input shaft—— Gear of input shaft——Gear of output shaft——Output shaft Classification of speed-change driving mechanism

Chapter 15 Transmission and transfer case 同©大学 TONGII UNIVERSTTY Three-shaft transmission >Three kinds of shaft input shaft(clutch shaft),counter shaft,output shaft(main shaft) Power drive path >Input shaft-Gear of input shaft-Gear of counter shaft- Gear of output shaft-Output shaft

Chapter 15 Transmission and transfer case Three kinds of shaft : input shaft (clutch shaft), counter shaft, output shaft(main shaft) Three-shaft transmission Power drive path Input shaft—— Gear of input shaft——Gear of counter shaft—— Gear of output shaft——Output shaft