Idling body shaking is a common situation for many drivers. If the driver finds obvious body shaking when starting the mixer or stopping the mixer without turning off the engine, it may mean that the mixer has the following three conditions:

1.搅拌车发动机积碳严重

1. Serious carbon deposition in mixer engine

造成小型混凝土自动搅拌车抖动常见的原因就是节气门过脏或喷油嘴积炭过多。当发动机内部的积碳过多时，冷启动喷油头喷出的汽油会被积碳大量吸收，导致冷启动的混合气过稀，使得启动困难，这种状况下，只有等到积碳吸收的汽油饱和，才容易着车，着车后吸附在积碳上的汽油又会被搅拌车发动机的真空吸力吸入汽缸内燃烧，又使混合气变浓，搅拌车发动机的可燃混合气时稀时浓，造成冷启动后怠速抖动。气温越低，冷启动所需要的油量越大，积碳的存在就越会影响冷启动的顺利与否。

The common causes of shaking of small concrete automatic mixer are dirty throttle or excessive carbon deposition at fuel injection nozzle. When there is too much carbon deposit inside the engine, the gasoline ejected from the cold start fuel injection head will be greatly absorbed by the carbon deposit, resulting in too thin cold start mixture, making it difficult to start. In this case, it is easy to start the car only when the gasoline absorbed by the carbon deposit is saturated. The gasoline adsorbed on the carbon deposit after landing will be sucked into the cylinder for combustion by the vacuum suction of the mixer engine, It also thickens the mixture, and the combustible mixture of the mixer engine is thin and thick, resulting in idle jitter after cold start. The lower the temperature, the greater the amount of oil required for cold start, and the existence of carbon deposition will affect the smooth cold start.

办法：清洗油路，检查怠速马达是否有积碳应该清洗。

Solution: clean the oil circuit and check whether there is carbon deposit in the idle motor. It should be cleaned.

2.搅拌车点火系统问题

2. Ignition system of mixer truck

检查一下火花塞、高压导线和点火线圈的工作状况，点火系统工作不好，火花塞跳火状况不好同样会导致这类故障现象。

Check the working conditions of spark plugs, high-voltage wires and ignition coils. Poor ignition system and poor spark plug jumping will also lead to such faults.

办法：检查火花塞是否积碳过多，更换火花塞。

Solution: check the spark plug for excessive carbon deposition and replace the spark plug.

3.搅拌车油压不稳

3. Unstable oil pressure of mixer truck

如果已经清理过发动机积碳、洗过节气门、换过油垫以及火花塞等，仍然发现怠速时车身抖动，建议您到修配厂检查燃油供油压力以及砼泵配件进气压力传感器等是否正常，如果油泵供油压力不正常或进气压力传感器数值错误和工作不好都会引发车身抖动。

It is recommended that you check whether the fuel supply pressure sensor and intake pump shake normally when the fuel supply is too high or the fuel supply pressure sensor is still not properly cleaned at idle speed. If the fuel supply pressure sensor and intake pump do not work properly, it is recommended that you check whether the fuel supply pressure sensor and intake pump shake when the engine is replaced.

搅拌车常见砼泵配件故障分析与

Failure analysis and solution of common concrete pump accessories of mixer truck

办法：检查油压，必要时更换部件。

Solution: check the oil pressure and replace the parts if necessary.

4、搅拌车发动机部件老化

4. Aging of engine parts of mixer truck

小型混凝土自动搅拌车抖动还与引擎脚(又称机爪垫)老化有关。引擎脚其实是搅拌车发动机的避震系统，引擎脚负责吸收发动机在运转时候的细微抖动，如果引擎脚出现问题，这些震动就会传到方向盘、驾驶室内，造成怠速时发生抖动。

The shaking of small concrete automatic mixer is also related to the aging of engine foot (also known as machine claw pad). The engine foot is actually the shock absorber system of the mixer engine. The engine foot is responsible for absorbing the slight jitter of the engine during operation. If there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel and cab, resulting in jitter at idle speed.