求一篇汽车变速器方面的英译汉文章一篇?

最新问答

• 美人儿不哭

  变速器的作用
  发动机的输出转速非常高，最大功率及最大扭矩在一定的转速区出现。为了发挥发动机的最佳性能，就必须有一套变速装置，来协调发动机的转速和车的实际行驶速度。变速器可以在行驶过程中，在发动机和车之间产生不同的变速比，通过换挡可以使发动机工作在其最佳的动力性能状态下。变速器的发展趋势是越来越复杂，自动化程度也越来越高，自动变速器将是未来的主流。
  变速器的型式
  自动变速器常见的有三种型式：分别是液力自动变速器(AT)、机械无级自动变速器(CVT)、电控机械自动变速器(AMT)。目前应用最广泛的是AT，AT几乎成为自动变速器的代名词。
  AT是由液力变扭器、行星齿和液压纵系统组成，通过液力传递和齿组合的方式来实现变速变矩。其中液力变扭器是最重要的部件，它由泵、涡和导等构件组成，兼有传递扭矩和离合的作用。
  与AT相比，CVT省去了复杂而又笨重的齿组合变速传动，而是两组带进行变速传动。通过改变驱动与从动传动带的接触半径进行变速。由于取消了齿传动，因此其传动比可以随意变化，变速更加平顺，没有换挡的突跳感。
  AMT和液力自动变速器（AT）一样是有级自动变速器。它在普通手动变速器的基础上，通过加装微电脑控制的电动装置，取代原来由人工作完成的离合器的分离、接合及变速器的选挡、换挡动作，实现自动换挡。
  Transmission gearbox's function the engine's output rotational speed is high, the maximum work rate and the maximum torque appears in certain rotational speed area. In order to display engine's optimum performance, must have a set of variable speed gear, is coordinated the engine the rotational speed and wheel's actual moving velocity. The transmission gearbox may in the automobile travel process, has the different gear ratio ween the engine and the wheel, through shifts gears may cause the engine work under its best power performance condition. Transmission gearbox's trend of development is more and more complex, the automaticity is also getting higher and higher, the automatic transmission will be future mainstream. [edits this section] transmission gearbox's pattern the automobile automatic transmission common to have three patterns: Respectively is hydraulic automatic transmission gearbox (AT), machinery stepless automatic transmission (CVT), electrically controlled machinery automatic transmission (AMT). At present what applies is most widespread is, AT becomes automatic transmission's pronoun nearly. AT is by the fluid strength torque converter, the planet gear and the hydraulic control system is composed, combines the way through the fluid strength transmission and the gear to realize the speed change bending moment. And the fluid strength torque converter is the most important part, it by components and so on pump pulley, turbine wheel and guide pulley is composed, has at the same time the transmission torque and the meeting and parting function. and AT compare, CVT has omitted complex and the unwieldy gear combination variable transmission, but is two groups of band pulleys carries on the variable transmission. Through changes the driving gear and the driven wheel transmission belt's contact radius carries on the speed change. Because has cancelled the gear drive, therefore its velocity ratio may change at will, the speed change is smoother, has not shifted gears kicks the feeling. AMT and the hydraulic automatic transmission gearbox (AT) is the having steps automatic transmission equally. It in the ordinary manual transmission gearbox's foundation, through installs the electrically operated installment which the microcomputer controls, the substitution originally coupling's separation which, the joint and the transmission gearbox completes by the manual control elects to keep off, to shift gears the movement, realizes fluid drive.

  浏览 265赞 64时间 2023-03-14
• 美食大卡

  Automotive Transmission
  1. Easy transmission of the basic structure: from the shell, transmission and manipulation of some parts.
  (1) Shell: Shell is the basic pieces for the installation of supporting transmission of all parts and lubricants stored. Has installed its bearing on the precision boring. Transmission under varying load, so the shell should have sufficient rigidity, the inner wall has strengthened, and the shape of complex, many for the castings (gray cast iron materials, commonly used HT200).
  In order to facilitate the installation, transmission and manipulation of some parts are frequently made partition type, cover and shell connected by bolts and reliable positioning. Shell has come on up, I put the oil, the oil-foot noodle check mouth, should also be taken into heat dissipation.
  (2) Transmission parts: is the gear, shaft, bearings and other transmission parts. Axis geometry through strength, stiffness calculation. Due mainly on the stiffness, while the carbon steel and alloy steel elastic modulus almost equal, so the general use of carbon steel (commonly used 45 steel). Only one gear with the shaft or axle load made serious only by steel. Shaft and gear for many spline connection (for neutral good, reliable transmission of power, a small compressive stress, etc.). Spline shaft part and the release bearing surface quenching treatment by the Department. Shaft with rolling bearing supports many, lubrication easy, high efficiency, small radial clearance, axial positioning should be reliable. Many ways to use splash lubrication (υ> 25m / s, as long as the appropriate viscosity apparently succumbed to the wall).
  (3) to manipulate parts: the main components located inside the transmission cover.
  2. The composition of the structure of transmission characteristics: easy transmission has high efficiency, simple structure easy to use file-Jun advantage of mine but a few, i change the scope of small (traction, speed, small), should be taken only at a few small files of certain Cut to adopt. If the increase in the scope of i, then increase the size so that transmission, axle span increase, both in order to increase the number of files without making axis span is too large, may be composed of transmission. The composition of the so-called transmission, usually by both a combination of easy transmission, one of a few more files known as the main transmission, less transmission known as the deputy.
  Transmission component advantages:
  (1) can reduce the number of gears, and file a few more gears to reduce the number of the more obvious advantages. Easy compared with the transmission, it can shorten the length of shaft to reduce the transmission of the external size and weight, and can easily be more than one reverse. So the current file into several files more than six hours, almost all composed of transmission.
  (2) transmission: the rate of change of Ω than big: If the main transmission gear ratio change rate Ωzu = 3, Vice transmission Ωfu = 4 is Ω = 12; subject the easy transmission Ω = 12, the structure is often difficult to reasonable.
  Composed of transmission of disadvantage:
  (1) file groups have correspondence ween the transmission ratio, it is not easy so that each file 2, (the speed and traction) are ideal.
  (2) shift manipulation trouble, sometimes manipulated variable part two, if not for the flower arrangement will shift memory.
  In order to reduce the manipulation of action, it is best to shift the order. To this end ten demands attention to the grade of scheduling so that the first group to eliminate the transmission ratio of all files larger than No. 11 file group, reaching the majority of phase transformation from stall speed just to manipulate the main purpose of this is the only way most convenient.
  字数可能少点

  浏览 396赞 99时间 2021-10-27