When it comes to the fuel system of a car, many car owners only know how to refuel and open the fuel tank to add a cap. They have little knowledge of the fuel system. Several necessary factors for the normal starting of automobile engine are enough fuel pressure. If there is no fuel supply or the fuel pressure is not enough, the engine will not burn well, or even can not start.

以下的内容是对燃油系统出现的故障现象进行分析，然后提出相关的解决办法为车主提供帮助。

The following content is the fuel system failure phenomenon analysis, and then put forward the relevant solutions to provide help for vehicle owners.

油压不足使发动机不工作

Insufficient oil pressure makes the engine stop working

隐藏在油箱里的汽油泵是为了减少气阻产生和水分进入，在汽油泵的入口有一个滤网，这个滤网口径较细，可以过滤小颗粒状的汽油杂质。汽车使用久了之后这个滤网会堵塞，会造成发动机熄火后不能工作的故障，解决的办法是释放油压，清洗滤网并重新加入改进后的汽油或柴油。

The purpose of the gasoline pump hidden in the tank is to reduce the air resistance and water entry. There is a filter screen at the inlet of the gasoline pump. The diameter of the filter screen is relatively small, which can filter the small particles of gasoline impurities. After the car has been used for a long time, the filter screen will be blocked, which will cause the engine to stop working. The solution is to release the oil pressure, clean the filter screen and re add the improved gasoline or diesel.

油压调节器安装在燃油输送管路的末端，用于调节进入到喷油器的压力，这个压力保持300-350KPa的恒定值，不会随进气管路的真空度和汽油泵的压力影响。油压调节器上也有一个滤网，如果这个滤网堵塞会造成车辆油箱位置传来“通通”空气流动的声音，用专用的清洗剂清洗滤网再使用压缩空气吹干故障就可以排除了。

The oil pressure regulator is installed at the end of the fuel delivery pipeline to regulate the pressure entering into the fuel injector. The pressure maintains a constant value of 300-350kpa, which will not be affected by the vacuum degree of the intake pipe and the pressure of the gasoline pump. There is also a filter screen on the oil pressure regulator. If the filter screen is blocked, the sound of "through" air flow from the position of vehicle fuel tank will be caused. The fault can be eliminated by cleaning the filter screen with special cleaning agent and then drying with compressed air.

我们也可以拆下全部气缸的喷油器和油轨，检查安装的位置是否有大量的积碳和汽油杂质，如果有也说明油压调节器的滤网堵塞了。

We can also remove the fuel injector and fuel rail of all cylinders to check whether there are a lot of carbon deposits and gasoline impurities at the installation position. If there is, it means that the filter screen of the oil pressure regulator is blocked.

汽油中的水分会腐蚀燃油系统部件

Moisture in gasoline can corrode fuel system components

汽油中都会包含有一些水分，水分的产生有可能是生产提炼过程中，也有可能是外界空气进入管道内。在较暖和的温度下，汽油可以适当溶解掉部分水分，但在冷态时水在汽油的溶解性变差，多出的水分会慢慢聚集在滤清器和油管的接头处，提供给管路的油量断断续续。

Gasoline will contain some moisture, which may be produced during the production and refining process, or the outside air may enter the pipeline. At a relatively warm temperature, gasoline can properly dissolve some water, but in the cold state, the solubility of water in gasoline becomes poor, and the excess water will slowly gather at the joint of the filter and oil pipe, and the amount of oil supplied to the pipeline is intermittent.

燃油系统中的元件长期遭受水分的腐蚀和破坏，出现这个情况更好是更换燃油系统中的有关部件，使用汽油对油路和油管进行冲洗，解除掉燃油管中的水分，发动机才能恢复工作。

The components in the fuel system have been corroded and damaged by water for a long time. In this case, it is better to replace the relevant parts in the fuel system, and use gasoline to flush the oil and oil pipes. Only by removing the moisture in the fuel pipes can the engine resume its work.

喷油器泄漏导致混合气过浓

Fuel injector leakage causes rich mixture

喷油器上有一个密封圈，如果该密封圈漏油会导致喷油器漏油，我们在进气歧管旁边可以看到有很多油迹。主要的原因是燃油压力低（比如怠速时是160-180KPa），尾气测试显示HC碳氢化合物和CO一氧化碳的含量高。

There is a sealing ring on the fuel injector. If the sealing ring leaks oil, the fuel injector will leak. We can see a lot of oil stains near the intake manifold. The main reason is that the fuel pressure is low (for example, 160-180kpa at idle speed), and the exhaust test shows that the content of HC hydrocarbon and CO and CO is high.

在检查时检查影响的冷却液温度传感器和空气流量计，检查对应车况下的冷却液温度，比如热车状态有关是80-90度，肯定不会是20-30度那么低；空气流量计在怠速时检测的进气量是30Hz，发动机转速提高可以增加到50-60Hz。

During the inspection, focus on the most influential coolant temperature sensor and air flow meter, and check the coolant temperature under the corresponding vehicle conditions. For example, the temperature of hot car is 80-90 degrees, which is certainly not as low as 20-30 degrees; the air intake detected by the air flow meter at idle speed is 30Hz, and the engine speed can be increased to 50-60Hz.

燃油系统的维护不仅仅是加油那么简单， 有条件的车主朋友可以到修理店去进行燃油系统的清洗，包括清洗节气门和喷油器，建议每隔2-3万清洗一次。

The maintenance of the fuel system is not just about refueling. If you have the conditions, you can go to the repair shop to clean the fuel system, including the throttle valve and fuel injector. It is recommended to clean the fuel system every 20000-30000 km.