1、毕 业 设 计（论 文）外 文 参 考 资 料 及 译 文译文题目： 汽车变速器设计 学生姓名： 学 号： 专 业： 所在学院： 指导教师： 职 称： 20xx年 2月 27日英文原文 Transmission design As we all know,automobile engine to a certain speed can be achieved under the best conditions, when compared issued by the power, fuel economy is relatively good. Therefore, we hope that
2、the engine is always in the best of conditions to work under. However, the use of motor vehicles need to have different speeds, thus creating a conflict. Transmission through this conflict to resolve. Automotive Transmission role sum up in one sentence, called variable speed twisting, twisting or sl
3、ow down the growth rate by increasing torsional. Why can slow down by twisting, and the growth rate but also by twisting? For the same engine power output, power can be expressed as N = wT, where w is the angular velocity of rotation, and T is the torque. When N fixed, w and T is inversely proportio
4、nal to the. Therefore, the growth rate will reduce twisting, twisting slowdown will increase. Automotive Transmission speed gear based on the principle of variable twisted into various stalls of different transmission ratio corresponding to adapt to different operational conditions. General to set u
5、p a manual gearbox input shaft, intermediate shaft and output shaft, also known as the three-axis, as well as the reverse gear shaft. Three-axis is the main transmission structure, input shaft speed is the speed of the engine, the output shaft speed is the intermediate shaft and output shaft gear me
6、shing between different from the speed. Different gears are different transmission ratio, and will have a different speed. For example, the Nissan ZN6481W2G SUV car manual transmission, its transmission ratio are: 1 File 3.704:1; 2 stalls 2.202:1;3 stalls 1.414:1; 4 stalls 1:1; 5 stalls (speeding fi
7、le) 0.802: 1. When drivers choose a launch vehicle stalls, Plectrum will be 1 / 2 file synchronization engagement with a back stall gear and output shaft lock it, the power input shaft, intermediate shaft and output shaft gear of a stall, a stall the output shaft gear driven, and the output shaft po
8、wer will be transmitted to the drive shaft . 1 shifting speed gear transmission ratio is 3:1, that is to say three laps to the input shaft and output shaft to a circle. When the growth rate of car drivers choose two stalls, Plectrum will be 1 / 2-file synchronization and file a joint separation afte
9、r 2 stall and lock the output shaft gear, power transmission line similar, the difference is that the output shaft gear of a stall 2 stall replaced by the output shaft gear driven. Band 2 speed gear transmission ratio is 2.2 :1, 2.2 laps to the input shaft and output shaft to a circle than a stall s
10、peed increase, lower torque. When refueling vehicle drivers growth stalls option 3, Plectrum to 1 / 2 back to the free file-synchronization position, and also allows the 3 / 4 file synchronization Mobile stall until 3 in the output shaft gear lock, power can be into the shaft axis intermediate shaft
11、 - the output shaft of the three stalls speed gear, led through three stalls speed gear output shaft. 3 stalls typical transmission ratio is 1.7:1, 1.7 laps to the input shaft and output shaft to a circle is further growth. When car drivers Option 4 refueling growth stalls, Plectrum will be 3 / 4 fr
12、om the 3-file synchronization stall gear directly with the input shaft gear joint initiative, and power transmission directly from the input shaft to the output shaft, the transmission ratio at 1:1, that the input shaft and output shaft speed the same. The driving force without intermediate shaft, a
13、lso known as direct file, the file transmission than the maximum transmission efficiency. Most cars run-time files are used directly to achieve the best fuel economy. Shift into the first interval when, in a free transmission when the speed gear output shaft is not locked in, they can not rotate the
14、 output shaft driven, not power output. General automotive manual transmission than the main 1-4 stalls, usually the first designers to determine the minimum (one stall) and maximum (4 files) transmission ratio, the middle stall drive by geometric progression than the general distribution. In additi
15、on, Also have a reverse and overdrive, overdrive is also known as the five stalls. When the car to accelerate to more than car drivers with the choice of five stalls, and a typical five-transmission ratio is 0.87:1, which is driven by a pinion gear, the gear when the initiative to 0.87 zone, passive gear have been transferred to a circle of the End. When the reverse gear output shaft to rotate in opposite directions. If one pair of meshing gears when we reverse rotation, with a middle gear, it will become t
