不同的发动机有正常的油耗值，不同的发动机型号的正常油耗是不同的。下面我们来看看发动机“烧”机油的原因。

Different engines have normal fuel consumption values, and the normal fuel consumption of different engine models is different. Now let's take a look at the reason why the engine "burns" oil.

1、外漏油

1. External oil leakage

漏油的原因有很多，包括：油路、排油口、油底壳垫片、气门盖垫片、油泵垫片、燃油泵垫片、正时链盖密封件和凸轮轴密封件。上述可能的泄漏因素不容忽视，因为即使是很小的泄漏也会导致大量的油耗。例如，每6秒一滴意味着每100公里耗油0.56升。更好的检查泄漏的方法是在发动机底部垫一块浅色布，在启动发动机后检查。泄漏的位置可以通过布上油滴的位置来判断。

There are many reasons for oil leakage, including: oil circuit, oil drain, oil pan gasket, valve cover gasket, oil pump gasket, fuel pump gasket, timing chain cover seal and camshaft seal. The above possible leakage factors should not be ignored, because even a small leakage will lead to a lot of fuel consumption. For example, a drop every 6 seconds means that the fuel consumption is 0.56 liters per 100 kilometers. A better way to check the leakage is to pad a light colored cloth at the bottom of the engine and check it after starting the engine. The location of leakage can be judged by the location of oil drops on the cloth.

2、前后油封故障

2. Front and rear oil seals failure

前后主轴承油封损坏肯定会导致漏油。这种情况只有在发动机负载运行时才能检测到。主轴承油封磨损后必须更换，因为像漏油一样会造成高泄漏。

Damage to the oil seals of the front and rear main bearings will definitely lead to oil leakage. This condition can only be detected when the engine is running under load. The main bearing oil seal must be replaced after wear, because it will cause high leakage like oil leakage.

3、主轴承磨损或失效

3. Wear or failure of main bearing

磨损或故障的焦化发电机组主轴承会激起多余的油并撞到气缸壁上。随着轴承磨损的增加，更多的油被抛出。例如，如果轴承设计游隙为0.04mm，提供正常的润滑和冷却，如果能保持轴承游隙，抛出的油量是正常的，不会损坏轴承。

Worn or faulty main bearings of coking generator set 8 will stir up excess oil and hit the cylinder wall. As bearing wear increases, more oil is thrown out. For example, if the bearing design clearance is 0.04mm, normal lubrication and cooling are provided. If the bearing clearance can be maintained, the amount of oil thrown is normal and will not damage the bearing.

当间隙增加到0.08mm时，抛出的油量将是正常量的5倍。如果将间隙增加到0.16mm，则抛出的油量将是正常量的25倍。如果主轴承喷油过多，会使更多的油溅到气缸上，使活塞和活塞环无法有效控制油量。这会导致活塞和活塞环上出现烧油或积碳。

When the clearance increases to 0.08mm, the amount of oil thrown will be 5 times the normal amount. If the clearance is increased to 0.16mm, the amount of oil thrown will be 25 times the normal amount. If too much oil is injected into the main bearing, more oil will splash onto the cylinder, making the piston and piston ring unable to effectively control the oil volume. This will cause oil burning or carbon deposition on the piston and piston rings.

通常，如果主轴承上的油流失过多，连杆轴承就会缺油，导致在某些低速条件下，油在气缸壁上的溅射不足，导致活塞环和活塞磨损，发动机不能高速运转。是时候控制油了。因此，主轴承磨损的后果是高油耗。

Usually, if the oil on the main bearing is lost too much, the connecting rod bearing will be short of oil, resulting in insufficient sputtering of oil on the cylinder wall under some low-speed conditions, resulting in wear of piston rings and pistons, and the engine cannot run at high speed. It's time to control the oil. Therefore, the consequence of main bearing wear is high oil consumption.

4、连杆轴承磨损或损坏

4. The connecting rod bearing is worn or damaged

连杆轴承游隙对油的影响与主轴承类似。此外，机油更直接地喷射到气缸壁上。磨损或损坏的连杆轴承会导致过多的机油溅到气缸壁上，导致设计用于控制正常机油量的活塞和活塞环无法有效控制多余的机油，从而使多余的机油进入燃烧室和被烧毁，即油耗高。注意：轴承游隙不足不仅会导致自身磨损，还会导致活塞、活塞环和缸壁磨损。

The influence of connecting rod bearing clearance on oil is similar to that of main bearing. In addition, the oil is sprayed more directly onto the cylinder wall. Worn or damaged connecting rod bearings will cause too much oil to splash on the cylinder wall, resulting in the piston and piston ring designed to control the normal amount of oil can not effectively control the excess oil, so that the excess oil enters the combustion chamber and is burned, that is, the oil consumption is high. Note: insufficient bearing clearance will not only cause wear, but also cause wear of piston, piston ring and cylinder wall.

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