所谓工况突变，是指搅拌车工况突然出现异常现象，这是一种常见的故障症状。下面就来讲讲相关内容吧。

The so-called sudden change of working condition refers to the sudden abnormal phenomenon of mixing truck working condition, which is a common fault symptom. Now let's talk about the relevant content.

例如：搅拌车突然停车后难以启动，甚至无法启动；行驶中搅拌车功率突然下降，行驶无力；行驶中刹车失灵或突然跑偏，甚至失灵。这种故障症状明显，易于检测。

For example, it is difficult to start or even fail to start after the mixer stops suddenly; The power of the mixer truck suddenly drops during driving, and the driving is weak; When driving, the brake fails or suddenly deviates, or even fails. This kind of fault symptom is obvious and easy to detect.

异响。搅拌车在行驶过程中的异响是搅拌车故障的“报警”。司机应该意识到搅拌车出了问题。他应立即停止搅拌车进行检查。他决不能让搅拌车“与疾病一起工作”。

Abnormal noise. The abnormal sound of the mixer truck during driving is the "alarm" of the mixer truck fault. The driver should be aware that there is something wrong with the mixer. He should immediately stop the mixer truck for inspection. He must not let the mixer "work with disease".

排烟颜色异常。在搅拌车工作过程中，正常燃烧产物的主要成分应为二氧化碳和少量水蒸气。如果搅拌车燃烧不正常，废气中会混入不完全燃烧的碳颗粒、碳氢化合物、一氧化碳和大量水蒸气。

The smoke exhaust color is abnormal. During the operation of the mixer truck, the main components of normal combustion products should be carbon dioxide and a small amount of water vapor. If the mixing car burns abnormally, the exhaust gas will be mixed with incompletely burned carbon particles, hydrocarbons, carbon monoxide and a large amount of water vapor.

此外，还有氮氧化物等。此时，废气的颜色可能会变成黑色、蓝色或白色，这意味着排气烟颜色异常。对于汽油机，正常排气时应无明显烟雾。

In addition, there are nitrogen oxides. At this time, the color of exhaust gas may turn black, blue or white, which means that the color of exhaust smoke is abnormal. For gasoline engines, there should be no obvious smoke during normal exhaust.

但当润滑油向气缸上移时，尾气呈蓝色；当燃烧不完全时，尾气呈黑色；当油与水混合时，尾气呈白色。

However, when the lubricating oil moves upward to the cylinder, the tail gas is blue; When the combustion is incomplete, the tail gas is black; When oil and water are mixed, the tail gas is white.

在混凝土搅拌车的变速器、驱动桥、主减速器、差速器和制动器总成中经常出现“过热和高温”。如搅拌车发动机过热时，主要是冷却系统问题，冷却液不足或泵不工作；变速器、驱动桥过热时，主要是润滑油不足；

"Overheating and high temperature" often appear in the transmission, drive axle, main reducer, differential and brake assembly of concrete mixer truck. For example, when the engine of the mixer truck is overheated, it is mainly the problem of the cooling system, insufficient coolant or the pump does not work; When the transmission and drive axle are overheated, the main reason is insufficient lubricating oil;

制动器过热时，主要是制动蹄片不工作返回。有时，上述现象会被仪表板上的警示灯直接反映出来，这就需要驾驶员在行驶时注意观察，外部温度也可以用手测量。

When the brake overheats, it is mainly because the brake shoe does not work and returns. Sometimes, the above phenomena will be directly reflected by the warning light on the instrument panel, which requires the driver to observe carefully when driving, and the external temperature can also be measured by hand.

泄漏是指发动机燃油、润滑油（或齿轮油）、制动液（或压缩空气）、动力转向系统油的泄漏。这也是一个明显的故障症状，仔细观察可以发现。

Leakage refers to the leakage of engine fuel, lubricating oil (or gear oil), brake fluid (or compressed air) and power steering system oil. This is also an obvious fault symptom, which can be found by careful observation.

例如，当压缩空气泄漏时，可以清楚地听到空气泄漏的声音。燃料、润滑油消耗过大，说明搅拌车技术状况恶化，出现故障。

For example, when compressed air leaks, the sound of air leakage can be clearly heard. Excessive consumption of fuel and lubricating oil indicates that the technical condition of the mixer truck has deteriorated and malfunctioned.

面对搅拌车工况突变要提前诊断处理是正确的行为。

In the face of sudden changes in the working condition of the mixer truck, it is the right behavior to diagnose and deal with it in advance. You should have a good understanding of this operation.