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.

以下的內容是對燃油系統出現的故障現象進行分析，然后提出相關的解決辦法為車主提供幫助。

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

油壓不足使發動機不工作

Insufficient oil pressure makes the engine stop working

隱藏在油箱里的汽油泵是為了減少氣阻產生和水分進入，在汽油泵的入口有一個濾網，這個濾網口徑較細，可以過濾小顆粒狀的汽油雜質。汽車使用久了之后這個濾網會堵塞，會造成發動機熄火后不能工作的故障，解決的辦法是釋放油壓，清洗濾網并重新加入改進后的汽油或柴油。

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.

油壓調節器安裝在燃油輸送管路的末端，用于調節進入到噴油器的壓力，這個壓力保持300-350KPa的恒定值，不會隨進氣管路的真空度和汽油泵的壓力影響。油壓調節器上也有一個濾網，如果這個濾網堵塞會造成車輛油箱位置傳來“通通”空氣流動的聲音，用專用的清洗劑清洗濾網再使用壓縮空氣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.

我們也可以拆下全部氣缸的噴油器和油軌，檢查安裝的位置是否有大量的積碳和汽油雜質，如果有也說明油壓調節器的濾網堵塞了。

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.

汽油中的水分會腐蝕燃油系統部件

Moisture in gasoline can corrode fuel system components

汽油中都會包含有一些水分，水分的產生有可能是生產提煉過程中，也有可能是外界空氣進入管道內。在較暖和的溫度下，汽油可以適當溶解掉部分水分，但在冷態時水在汽油的溶解性變差，多出的水分會慢慢聚集在濾清器和油管的接頭處，提供給管路的油量斷斷續續。

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.

燃油系統中的元件長期遭受水分的腐蝕和破壞，出現這個情況更好是更換燃油系統中的有關部件，使用汽油對油路和油管進行沖洗，解除掉燃油管中的水分，發動機才能恢復工作。

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.

噴油器泄漏導致混合氣過濃

Fuel injector leakage causes rich mixture

噴油器上有一個密封圈，如果該密封圈漏油會導致噴油器漏油，我們在進氣歧管旁邊可以看到有很多油跡。主要的原因是燃油壓力低（比如怠速時是160-180KPa），尾氣測試顯示HC碳氫化合物和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.

在檢查時檢查影響的冷卻液溫度傳感器和空氣流量計，檢查對應車況下的冷卻液溫度，比如熱車狀態有關是80-90度，肯定不會是20-30度那么低；空氣流量計在怠速時檢測的進氣量是30Hz，發動機轉速提高可以增加到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.

燃油系統的維護不僅僅是加油那么簡單， 有條件的車主朋友可以到修理店去進行燃油系統的清洗，包括清洗節氣門和噴油器，建議每隔2-3萬公里清洗一次。

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.