﻿ 自动变速箱维修常见的三大故障 - 公司新闻



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发布日期： 2020-09-27 来源： http://www.chinabjjy.com/ 点击：


1： High engine speed during driving
这个问题包括平稳行驶中一直转速高，提速过程中转速高两种情况。 平稳过程中转速高比较容易测试，比方一部引擎排量2.0L的车辆平时在2600转车速即可达到100公里，但一段时间内经常需要3000转或更高才能达到100公里，则说明已出现此故障。
This problem includes two situations: high speed in smooth driving and high speed in acceleration. For example, a vehicle with 2.0 l engine displacement can reach 100 km at 2600 rpm, but it often needs 3000 rpm or higher to reach 100km in a period of time, which indicates that this fault has occurred.
Generally, this kind of fault is caused by the failure of high speed transmission or locking clutch inside the torque converter, so it is necessary to overhaul the gearbox immediately.
The engine speed is too high during the acceleration process. This fault test is a bit complicated, because during the acceleration process, the rise of engine speed is closely related to the accelerator pedal. For example, when the engine of a normal Passat is small, the engine can accelerate to 2500 rpm, but the engine needs to be increased to 5500-6000 rpm at full throttle. This huge contrast is due to It is controlled by the fuzzy logic of the transmission electronic control system, so this standard needs a certain professional automatic transmission maintenance level to complete.
2： The car can't run

It is the driver's feeling that the vehicle can't run, including the lack of high speed, that is, the vehicle can't reach 100 km / h in any case. The acceleration is very slow, i.e. the accelerator is heavily stepped on, but the vehicle still accelerates slowly. The reaction is very poor and the feeling of soundness is lacking. This situation also includes two situations: the engine speed is slow, that is, the engine speed is not up and the speed is fast but the speed is not fast. Therefore, this is a relatively complex problem. The normal test standard is to start the vehicle, properly step on the accelerator pedal, the engine speed will increase steadily, and the vehicle will accelerate, generally around 2500 rpm, and the vehicle speed will be between 25-30 km. The automatic transmission will enter the first shift, and the engine speed will gradually rise after appropriate fall. Meanwhile, the speed will obviously accelerate. When the vehicle is 40 km, the engine will change its speed When the gearbox is in the third gear, the speed will be further accelerated, and it will enter the high gear of the gearbox at the speed of 60 km. During the whole process, the engine will be lifted again after appropriately falling back during the upshift process, without idling and slipping.
Generally, when a vehicle with an engine displacement of about 2.0 runs smoothly, the speed of the engine can reach 100 km / h at 2500-3000 rpm. If the speed needs to be further increased, the engine speed needs to be increased synchronously. If the engine refueling is very stuffy and not smooth, it generally indicates that the engine needs automatic transmission maintenance. If the engine accelerates strongly, it may be the internal gear of the gearbox Wrong position, burned clutch, mechanical failure of torque converter, etc.
三：入档迟 入档死火 入档冲击
3： Late gear in, dead fire in gear impact
测试入档标准是启动引擎、怠速、踩住刹车、入档，正常的情况是1-1.2秒的时间内有入档的感觉，放开刹车踏板，在不踩油门踏板的情况下车辆会慢慢起步并逐步提取到0-20公里/小时的车速，这是一部车正常的入档标准，如果入档后超过2秒钟以上即定位入档延迟 ，这种情况需要立即检修；如果入档有强烈的冲击感觉即定位入档冲击，需要说明的是任何自动变速箱入档都有一定程度的冲击感觉，如果丝毫的感觉都没有，反而说明内部有故障，但这个冲击比较大则是不能够接受的，引发该故障的原因很复杂，包括除变速箱以外的很多方面。入档死火的情况是入档时引擎会死火，这种问题在冷车时比较明显，引发该故障有变速箱的原因也有其它车身系统的原因。
The standard of gear selection is to start the engine, idle, step on the brake and shift into gear. The normal situation is to feel the gear in within 1-1.2 seconds. Release the brake pedal, and the vehicle will start slowly without stepping on the accelerator pedal and gradually extract the speed of 0-20 km / h. This is a normal gear in standard for a car. If the gear is put into gear for more than 2 seconds, the gear in delay will be located This situation needs to be repaired immediately. If there is a strong impact feeling when shifting into gear, i.e. positioning impact, it needs to be explained that any automatic transmission has a certain degree of impact feeling when shifting. If there is no feeling at all, it indicates that there is an internal fault, but the impact is relatively large, which is unacceptable. The causes of the fault are very complex, including that except for the gearbox Many other aspects. The case of stalling in gear is that the engine will stall when it is in gear. This problem is more obvious when the car is cold. The fault is caused by the gearbox and other body systems.

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