1、外文翻译 Auto Transmission First, an overview of automotive transmission and the development trend Automobile available more than a century, especially from the mass production of motor vehicles and the automotive industry since the development of large, Car has been the economic development of the worl
2、d for mankind to enter the modern life and have had a tremendous impact on the immeasurable, The progress of human society has made indelible contributions to the great, epoch-making set off arevolution. From From the vehicle as a power plant using internal combustion engine to start, auto transmiss
3、ion has become an important component. Is Generation is widely used in automotive reciprocating piston internal combustion engine with a small size, light weight, reliable operation and the use of The advantages of convenience, but its torque and speed range of smaller changes, and complex condition
4、 requires the use of motor vehicles Traction and the speed can be considerable changes in the scope. Therefore, its performance and vehicle dynamics and economy of There are large inter-contradictions, which contradictions of modern automotive internal combustion engine by itself is insoluble. Becau
5、se Here, in the automotive power train set up the transmission and main reducer in order to achieve the purpose of deceleration by moment. Speed The main function of performance: change gear ratio of motor vehicles, and expand the wheel drive torque and rotational speed of the Fan Wai, in order to a
6、dapt to constantly changing driving cycle, while the engine in the most favorable conditions within the scope of work； no change in the direction of engine rotation, under the premise of the realization of cars driving back； the realization of the free, temporary Interruption of power transmission,
7、in order to be able to start the engine, idling, etc. Variable-speed drive transmission by the manipulation of institutions and agencies. Change the transmission ratio by way of transmission is divided into There are class-type, non-stage and multi-purpose three. Have class most widely used transmis
8、sion. It uses gear drive, with a number of transmission ratio setting. Stepless transmission Continuously Variable Transmission (CVT) transmission ratio of a certain The framework of multi-level changes may be unlimited, there is a common type of power and torque (dynamic fluid-type) and so on. Cont
9、inuously Variable Transmission Transmission development is the ultimate goal, because only it can make the most economical engine in working condition Can provide the best vehicle fuel economy and optimal power in order to provide the most comfortable By the feeling. Todays CVT is a typical represen
10、tative of the CVT and IVT, however as a result of the reliability of Poor, non-durable materials and high cost issues, development is not very good. Comprehensive refers to transmission torque converter and the mechanical components have the level of transmission variable hydraulic mechanical Speed,
11、 the transmission ratio can be between the maximum and minimum range of a few discontinuous change for no class, but its Significantly lower transmission efficiency than the efficiency of gear drives. 2 By manipulation, transmission control type can be divided into mandatory, automatic and semi-auto
12、matic control to manipulate three - Species . Mandatory on the driver to manipulate the direct transmission gear shift control for the majority of motor vehicles used Also known as Manual Transmission Manual Transmission (MT). Automatic transmission control selection of the transmission ratio (trans
13、mission) is carried out automatically. Just add the driver to manipulate Speed pedal, you can control the speed, also known as Automatic Transmission Automatic Transmission (AT). It is According to the speed and load (throttle pedal travel) for two-parameter control, stall in accordance with the abo
14、ve two Parameters to automatically take-off and landing. AT and MT in common is that they are level transmission, but AT According to the speed of the speed shift automatically, you can eliminate the manual transmission setback of the shift feel. However, AT also have many drawbacks, such as body co
15、mplex, mechanical efficiency is not high, high cost, reliability and control Sensitivity remains to be increasing . AMT (Automated Mechanical Transmission) is in the traditional dry clutch and manual transmission gear based on the transformation of form, mainly to change the part of the manual gears
16、hift control. That is, the overall structure of the MT cases the same switch to electronically controlled automatic transmission to achieve. Semi-automatic control, there are two forms of transmission. A number of stalls is a common automatic control, and the remaining stalls manipulated by the driv
17、er； the other is pre-style, that is, pre-selected pilot stalls, the clutch pedal in the down or release the accelerator pedal, the for retirement or an electromagnetic device to shift the hydraulic device. In recent years, with advances in vehicle technology and road traffic density increased, the p
18、erformance requirements of the transmission is also getting higher and higher. A large number of automotive engineers in improving the performance of automobile transmission study a great deal of effort devoted to the rapid transmission of technology development, such as AT, AMT, DCT, CVT and the em
19、ergence of IVT. 2003 Hyundai AT, AMT, DCT, CVT forum reached a consensus on the following:in the next Development, MT will continue to be the most widely used automotive transmission, AMT will increase the proportion of the application, AT also Will occupy a large market share, CVTs use of certain l
20、imitations, can only be due to a number of small displacement Car, DCT (dual clutch transmission) will also be the budding growth. From 2003 to now, vehicle speed The development of devices and the forum basically the consensus reached by consensus. By comparing the analysis, the traditional mechani
21、cal transmission is still the most widely used vehicle change Speed. Although it has many shortcomings, such as shifting the impact of large, bulky, cumbersome to manipulate and so on； however, it also There are many advantages, such as high transmission efficiency, reliable operation, long life, ma
22、nufacturing processes mature and low cost. Therefore, if we can improve the mechanical transmission of the above-mentioned shortcomings, it still has great room for development. Second, Manual Transmission Fault Diagnosis Manual transmission at the beginning of the fault diagnosis prior to Failure t
23、o confirm from other parts is not: to check the tire And wheels, to confirm the normal tire pressure, and the wheel is flat Value of； to confirm instead of noise and vibration from the engine. Clutch , And steering and suspension, etc. (A), skip file 1. Phenomenon Vehicle acceleration, deceleration,
24、 climbing or severe vehicle vibration, the gear lever neutral position automatically jump. 2. Reasons self-locking device of the ball did not enter the grooves or linked file does not meet the full-gear tooth meshing long； self-locking device worn groove ball or serious, self-locking spring is too s
25、oft or broken fatigue； gear along the direction of tooth wear as a long cone-shaped； one or two too 松旷 shaft bearing, so that one or two three-axis and the crankshaft axis of the heart or different transmission and clutch shell shell bonding plane of the vertical axis the relative change in the cran
26、kshaft； Second Gear axis often axial or radial gap is too large； the axis of axial or radial gap is too large. 3. Fault diagnosis and troubleshooting Jump to file stalls Unascertained: After taking heat the entire vehicle, increase the use of continuous, slow approach to road test each file is determined. Will jump to the gear lever hanging file stalls the engine off, transmission cover removed carefully to observe the mating dance gear case file. engagement does not meet the length, then the resulting fault； to reach a total length of engagement, should continue to check；
