機(jī)械外文翻譯文獻(xiàn)翻譯無級變速器(編輯修改稿)

　

【文章內(nèi)容簡介】 . AMT39。s core technology is putercontrolled, electronic technology and quality will directly determine the quality of the performance and operation of the AMT. 3, the CVT The continuously variable transmission (CVT: Continuous Variable Transmission) with a steptype main difference in that: it is the speed ratio is not interrupted, but a series of discrete values, for example, has been changing from to . CVT structure is simpler than conventional automatic transmission, smaller, neither many manual transmission gear pair, there is no automatic transmission plex plaary gear set, it depends mainly on the main driven wheel and metal band or wheel dial to achieve the speed ratio stepless change. Its principle is as several sets of gear sizes watched under the control of an aggregate with a mon gearbox, and a different speed ratio, like a bicycle pedal driven by the size of the wheel and the chain wheels to rotate at different speeds. Also changes due to the different strength of the thrust generated by each group gear sizes, resulting in the transmission output speed, in order to achieve the bradycardia rotation, regardless of grade. CVT belts and variablewidth ratchet power transmission, ., when the ratchet wheel changes the groove width of the elbow, corresponding to the shift change the contact radius of the drive wheel and the driven wheel on the driving belt, a belt ships with a rubber band, metal band and metal chain. CVT is truly stepless, it is light weight, small size, fewer parts, and AT has a high operating efficiency, lower fuel consumption. CVT disadvantage is obvious, is the transmission belt can be easily damaged, can not withstand a greater load, low power and low torque vehicles can only be restricted to about 1 liter of displacement, so the share of the automatic transmission 4. After the major car panies vigorously research in recent years, the situation has improved. CVT will be the development direction of the automatic transmission. Domestic vehicle models 機(jī)械專業(yè)中英文文獻(xiàn)翻譯 equipped with the CVT, such as the Nissan Teana, Sylphy, XTrail full range of models, FAWVolkswagen, Audi, the Guangqi Honda Fit, South Fiat Siena, Pa Baclofen, Chery Cowin. The main structure and working principle of the CVT (1) steel belt CVT The CVT is a bination of pulleys and a steel strip, power is transmitted to replace the conventional gear device. The main ponents of the basic member of the including capstan group, a driven wheel set, a metal band, and a hydraulic pump, etc.. Metal band by the two beams of metal rings and hundreds of sheet metal. Capstan group and a driven wheel set by the movable disc and the fixed rent, close to one side of the pulley and the cylinder can slide on the shaft, the other side is fixed. Movable plate and the fixed plate cone structure, the cone forming a Vgroove to engage with the Vshaped metal transmission belt. The power output of the engine output shaft is first passed to the capstan of the CVT, and then is transmitted to the driven wheel through a Vtype power transmission belt, and finally via the gear unit, the differential is transmitted to the wheels to drive the car. Through the capstan and the driven wheel when the movable disc for axial movement to change the working radius of the capstan and the tapered surface of the driven pulley with a Vtype drive belt engaging, thereby changing the transmission ratio. The amount of axial movement of the movable platen is needed by the driver through the control system to adjust the capstan, the follower wheel cylinder of the hydraulic pump pressure to achieve. Continuously adjusted in order to achieve a continuously variable transmission can be achieved due to the working radius of drive pulley and driven pulley. In the the CVT hydraulic system, the role of the slave cylinder to control the tension of the metal band, in order to ensure the efficient and reliable delivery of power from the engine. Active cylinder to control the position of the driving bevel wheel moves axially along the Vgroove move in the the capstan group metal band, due to the constant length of the metal s