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Transmission oil temperature control
英语绕口令带翻译For people who buy the car, reliability and fuel efficiency is the cond oftwoimportant price considerations. No doubt, for the new owner is concerned, the most terrifying thing on the way to remove car. In addition, owner and expect the car can try to durable. Meanwhile, due to current global fuel prices have rin to make owners pay more attention。thefuelefficiency, and hope to try to reduce carbon emissions. Auto power transmission system includes an internal combustion engine, transmission and more than a gear than wheels. Engine torque and speed will be needed for the railway traction power and car in the transmission of conversion. In addition, the transmission can also control wheel rotation direction. Manual and automatic transmission speed generally fall into two. Automatic transmission can automatically control friction unit, lection of gear ratios and shift. Automatic transmission will adopt hydraulic oil to achieve lubrication and frozen effect, hydraulic oil is a very special liquid, can be in any vere conditions operation. Automatic transmission oil (the main function of ATF) from the motivation for: transferred engine torque converter power transmission device; Absorb the torque converter produces thermal and moved to the front of a frozen device; car As clutch friction of the coolest refrigerants, it can absorb and by clutch or take out meshing the heat ener
gy produced; Through a complex hydraulic control system, the liquid pressure transmission to the system USES valve, rvo machines, pump, clutch always pump, hydraulic pipe and pipe to control; As a planetary gears, bearings, rvo machines, clutch and target group-exact marketing of lubricant and coolant.
Automatic transmission oil in operating temperature (about 90 °C / °F) viscosity 195 is general very low. But if the oil temperature is too low (for example is 0 ° C / 30 °F below), its viscosity will greatly incread, lead to a very high drag torque (dragtorque). As a result, gear meshing, it can cau is commonly synchronous devices of this couldn't cope with high torque force. If gear can't mesh or shift, car will not start. For this reason, "cold start" program will respond to the oil temperature and activated, to ensure that at least one gear can succeed mesh. Warm car driving car started after process when, unless required by obvious acceleration or dragged heavy
陷入困境英语objects (such as trailer), otherwi the hydraulic oil temperature will only slowly rising, but it also means drag torque will slowly rising. If the car is chronically high drag torque environment, synchronous devices will overload and damaged. In gearbox to add some loss, will shift some moved to higher speed valve and improve the quality of the gearbox lubricant, the all can accelerate the process of car warm up. Thus, engine, gearbox and catalyst can be quickly reach bes
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t operation temperature. The faster transmission is the optimum operating temperature, can be ud to save fuel consumption and faster start the gear shift program. Gear shifting part through hydraulic or electronic is starting valve to control, the shifting unit start-up will significantly by the influence of the temperature of automatic transmission oil, reason is with the temperature and the viscosity will ri significantly, so the temperature can influence the degree of pressure and time characteristics. Once the automatic transmission oil gets hot, its temperature variation of amplitude will increa, so the shift when the t standard oil, must consider the problems about the oil temperature. Under high temperature operation, no doubt, automatic transmission oil very vulnerable to the influence of the temperature of cryogenic, but compared to the reaction of the reaction temperature, the much more. The process of automatic transmission will produce a lot of friction, and the will generate a lot of friction heat. Liquid will constantly stir in torque converter and pump in the mouth and current meters of hydraulic circuits. Whenever variable speed shift, clutch components will produce more than box of oil can take the heat. The transmission, the greater the load of the heat generated by then, box of oil will become more heat. General traditional transmission oil temperature can allow maximum temperature for 80 to 100 °C or 175 ° F, and to 212 special transmission oil temperature can be as high as 110 ℃to 130 °F or 230 to 265. However, nowadays advanced automobile transmission oil temperature could be as high as 120 to 150 ℃or 250 to 300 °F, and for heavy trucks
for example is 18 rounds of freight trains, if it in hot weather, the oil temperature under driving even to 170 °C 160 °F or 320 to 340. Such a high oil temperature can cau box of oil and variable speed component damage. Transmission oil working life, in the high temperature environment, the working life of the transmission oil can be reduced. Once the temperature above normal operation level (90 °C / 195 °F above), lubricants oxidation speed will increa, so the effective life be shortened. Bad on the law 娒designated, when the temperature
above normal operation temperature 。12 ° C / 20 ° F, box of oil expected working life will be halved. Work surface wear, in addition to the outside, the influence of high temperature will also work on the surface of the transmission activities components threat. Reason is that when the temperature more and more high, was taken from the friction area, so the thermal and less chance of gear stuck will soar. When the temperature ro more than 175 °C / 350 °F, the steel and iron the hardness will decline. If we consider gear and clutch working surface temperature is usually higher than the oil temperature, we may expect gear with oil temperature the hardness of fallen, even if the oil temperature below 175 ° C / 350 ° F. Rubber al and pipeline, rubber al and coolant pipeline extremely nsitive to high oil temperature. When the rubber al in high temperature would harden and become fragile, cau its working life and reliability drastically. When cars can't install a wired co
olant pipes, we must adopt the PA12 plastic (amide 12 or nylon 12) made of coolant pipeline, this pipeline will torque device circulation output port and coolant connection. In high temperature (° C / 350 than 175 ° F) environment, plastic frozen pipe may buckling that box of oil to high and make coolant failure. ECU overheat, the electronic control unit (ECU) job is to monitor and control the operation of automatic transmission system. In some cas, ECU will be placed in the gearbox enclosure to try to u gearbox existing space, this means control unit will be automatic transmission oil with direct contact maintained for a long time. This configuration advantages including can nd a link ECU, nsors and starter of wiring try to shorten; Reduce the number of plug and connectors; Reduce the noi and make between circuit shift position detection more accurate. If the transmission environment and coolant temperature is exorbitant, automobile's power and control electronics will not to operate properly so that its life shorten and appear damaged. Therefore, the transmission system of overheating situation to detect and proper even predict produced measures to reduce heat and/or improve overheating. For some extreme cas, the system must more accurately measuring temperature and the nsitive electronic components clo to prevent control electronics were destroyed. Conclusion, in order to overcome the supervisory automatic transmission challenge, the temperature of LM71 national miconductor's special optimized for high temperature application, launched LM71A1. LM71A1 is a qualified SPI interface digital temperature s
ensor, its wide working temperature range (40 ° C ° C or to + 175 ° F 40 to 350), make the temperature monitoring can at the
same time in cold start and overheating. This device is to provide, and ensure LuoPian form with faster to warm temperature respon thus car process has better control. However, it is the biggest characteristic is available in high temperature (130 ° C or to 150 ° F) 165 to 300 ° and high resolution (LSB) 0.03125 under C/to extremely high accuracy, in order to under the environment of high temperature in extremely accurately nsor temperature. In order to maintain the box of oil in normal operation scope, and properly control valve and shift time and prevent part of degradation and damage, fast accurate temperature detection and indispensable. So, can obtain higher fuel efficiency and enhance the system reliability. LM71A1 can help designers design antirums to transmission electronic control unit of high-performance thermal management system.know>风衣里面穿什么
变速器油温的控制
对于购买汽车的人来说，可靠性及燃油效益是仅次于价格的两项重要考量因素。毫无疑问，对于新车主而言，最可怕的事情莫过于汽车在途中熄火。此外，车主也期望汽车能尽量经久耐用。与此同时，由于目前全球燃油价格不断上升，以使车主更加关注燃油效率，并希望能尽量减低二氧化碳的排放量。thorne
中山化妆培训汽车的动力传动系统包括有一个内燃机、一个多齿轮比变速器及车轮。发动机转矩及速度会因汽车所需的牵引动力而在变速器中进行转换。此外，汽车的变速器还可控制车轮的转动方向。变速器一般分为手动及自动变速两种。自动变速可自动控制磨擦单元、齿轮比的选择及换档。自动变速会采用液压油来达到润滑及冷冻的效果，液压油是一种非常特别的液体，可在任何恶劣的环境下运行。自动变速箱油(ATF)的主要功能为：把动力从发动机变矩器传送到动力传动装置; 吸收由变矩器产生的热力并转移到汽车前端的冷冻装置; 作为离合器磨擦的冷冻剂，它可吸收及散发由离合器或带啮合所产生的热能; 通过一个复杂的液压控制系统把液体压力传送开去，该系统采用汽门、伺服机、泵、离合器总泵、液压管路及管道来进行控制; 作为行星齿轮、轴承、伺服机、离合器和轴衬的润滑剂及冷冻剂。
breath自动变速箱油于工作温度下(约90°C/195°F)的黏度一般都非常低。可是假如油温太低时(例如是0°C/30°F以下)，其粘度便会大幅增加，导致产生非常高的曳力矩。结果，齿轮便难以啮合，原因是当中的同步器件一般都不能应付这般高的转矩力。假如齿轮不能啮合或换档，汽车便不能开动。基于这个原因，“冷起动”程序会因应油温而被激活，以确保至少有一个齿轮能够成功啮合。暖车过程当汽车开始行驶后，除非需要明显加速或拖拉笨重的物体(例如是拖车)，否则液压油温只会慢慢地上升，而这也意味着曳力矩也会缓慢地上升。假如汽车长期处于高曳力矩的环境，同步器件便会超载并且受损。在齿轮箱加入一些损耗、将换档点移到较高的转速汽门及提高齿轮箱润滑油的质量，这些均可加快暖车的过程。由此，发动机、齿轮箱及催化剂便可更快地达到最佳的运作温度。变速器越快达到最
优的工作温度，便可越快启动用于节省耗油量的齿轮换档程序。齿轮的换档组成部份是经由液压或电子起动汽门来控制，这些换档单元的起动会
