【正文】 peed transmission 5 value (ie 5 level), so it is a stepvariable transmission. The manual transmission is the most mon transmission, posed of relatively AT and CVT, its structure is simple, the main axis of the input shaft, output shaft and the intermediate shaft, the shaft bearings, each gear, the synchronizer, the shift operating mechanism. Manual transmission failure rate is relatively low, the use of lower cost. 2, AT Automatic transmission (AT: Automatic Transmission) automatic upshifts and downshifts lifting gear control, puter based primarily on speed and load (throttle pedal stroke), but also refer to a variety of signal transmission oil temperature, shift mode. The same point of the AT and MT both stepvariable transmission, only that the AT has a continuous speed ratio variation in the respective gear, and the speed according to the vehicle speed automatically to achieve a gear change for hand can be eliminated block cars frustrated variable block feeling. (1) AT structure: Compared with manual wave, hydraulic automatic transmission (AT) are very different in structure and use. Manually waves mainly posed of gears and shafts, variable speed torque generated by different gear binations。機(jī)械專業(yè)中英文文獻(xiàn)翻譯 英文原文 Stepless speed technology Stepless speed technology USES belt and the work of the Lord diameters driven pulley, cooperated with the power to deliver, can realize the TRANSMISSION ratio of the continuous change, and get the TRANSMISSION and engine condition the best match between. Common stepless transmission have hydraulic mechanical stepless transmission and belt type stepless transmission , the current domestic market of the vehicles already more and more. Editor this section stepless transmission and the origin of the automatic transmission Automatic transmission is easy to operate, reduce fatigue driving, born of the gear drive system, the control method, it can be divided into the hydraulic controlled hydraulic and electric automatic transmission hydraulic automatic transmission。 According to the change of the transmission way and can be divided into have levels of automatic transmission and no levels of automatic transmission. Therefore, stepless transmission is actually a kind of automatic transmission, but it than mon automatic transmission is much more plex, more advanced technologies. Stepless transmission and mon hydraulic automatic transmission of the biggest differences is on the structure, the latter is by hydraulic control gear drive system structure, still have the gears, it can be realized in between the two block is continuously variable transmission , and is two groups plate and a belt speed of than traditional automatic transmission, simple structure, smaller. In addition, it is free to change gear ratios, so as to realize the full speed stepless speed change, make more smoothly, without the traditional transmission shift at the feeling. Editor this section stepless transmission classification To realize stepless speed, driving mode can be adopted according to the liquid transmission, power transmission and mechanical drive three ways. Liquid transmission Liquid transmission is divided into two kinds: one kind is hydraulic, mainly is posed by the pump and motor or the valve and pump variable speed of transmission device, apply to small and mediumsized power transmission. Another kind is hydraulic type, adopts hydraulic coupler or hydraulic torque of variable speed drive, used in high power (kw). To hundreds of thousands of The main characteristics of liquid transmission is: speed range, can absorb the impact and big to prevent transmission efficiency high, overload, long life, easy to realize automation: manufacturing precision demand is high, the price is more expensive, output characteristics for constant torque, sliding rate is bigger, running vulnerable to leak. Power transmission Power transmission basically is divided into three categories: one kind is electromagic sliding type, it is in the asynchronous motor installed in electromagic clutch, sliding by changing its exciter current to speed, this belon