Why does fuel consumption suddenly rise?

Pay attention to these situations: 

A lot of truck drivers find that the vehicle has unstable idle speed and weak acceleration, and it is also accompanied by rising fuel consumption and excessive exhaust emissions. This situation is usually due to the engine oil entering the engine's combustion chamber and participating in the combustion, which will heavily damage engines. The following are some common reasons and solutions for these situations .

▎The valve and valve duct are worn seriously

The valve duct of the engine plays a guiding role when the intake and exhaust valves are opened and closed. If the valve is used for a long time and causes serious wear, it will make the cooperation gap between the valve and the duct become larger. It can be sucked into the combustion chamber along the gap to participate in the combustion, so if the gap is found to be larger during normal maintenance, it should be replaced in time.

Although some engines are equipped with duct oil seals, the valve oil seals will generally be worn out after a long time of use. That will lead some engine oil enter the combustion chamber through this damaged valve duct, so you need to install the duct oil seal when repairing the engine. And the most important thing is to use the specified engine lubricants according to the instructions.

▎Too much oil in the air filter

When adding oil to the filter, everyone thinks that the more the better, but that’s not true. For engines using an oil-bath air filter, if there is too much oil in the oil pan of the filter, when the engine is running at high speed, the oil will enter the combustion chamber through the intake duct to participate in the combustion. Burning engine oil produces blue smoke phenomenon and a large amount of carbon deposits are generated, which accelerates engine wear.

Therefore, when adding clean oil to a filter with an oil bath, you should pay attention to the height of the oil level. Generally, it should be added to the middle of the upper and lower score lines. Do not add too much.

▎Something wrong with the turbocharger

The failure of the supercharger is generally due to the damage of the floating bearing and the sealing device on the compressor side, the engine oil will be brought into the intake pipe of the engine along with the airflow of the compressor, which will cause blue smoke in the exhaust pipe. Therefore, regular inspection of the supercharger and timely repair or replacement of new parts can ensure the normal operation of the engine, extend the maintenance cycle, and reduce the cost of use.

In addition to the above three common faults, there are many reasons for diesel engines to burn engine oil. The best way to solve these problems is to check and maintain. Pay more attention to the working environment of the engine in daily work. Choose the right fuel and lubricant according to the technical requirements of the engine. Reduce the premature wear of the engine components through maintenance to ensure diesel engine operation state.