Proper use and maintenance of turbocharged engines

Excavators are a big hit. Last month we generated many excavator orders from September to October, in order to facilitate our customers to follow up on better use of the excavator, we have put together a guide on the use of turbocharged engines.

As the turbocharger is the use of engine exhaust gas drive turbine, often in high speed, high temperature work, exhaust gas turbine temperature is generally more than 600 ℃ and its rotational speed is very high, so in order to ensure normal operation, its proper use and maintenance is essential, the following are the main maintenance methods used in the day-to-day:

01 What should I pay attention to before starting the engine?

At the beginning of the engine start, do not immediately increase the throttle, it should be idled for about 3min so that the oil temperature rises, fluidity can become good, ensure that the turbocharger is fully lubricated, and then only increase the engine speed for operation, which is particularly important in winter.

02 What should I pay attention to when I stop using?

Before turning off the engine
The engine should not be turned off immediately after a long period of high speed operation. The reason for this is that when the engine is operating, a portion of the oil is supplied to the turbocharger rotor bearings for lubrication and cooling. When the high-speed engine suddenly stops, the oil pressure quickly drops to zero, lubrication is interrupted, the heat inside the turbocharger can not be taken away, and it will be transmitted to its internal bearings, due to inertia at this time the supercharger rotor is still under the action of high-speed rotation, so it will cause turbocharger rotor shaft and bushings between the "bite" and damage to the bearings and the Shaft.

After stalling
In addition, when the engine is suddenly turned off, the temperature of the exhaust manifold is very high, and its heat will be absorbed into the turbocharger housing, and the oil that stays inside the turbocharger will be boiled into carbon deposits. When more and more of this carbon blocks the oil inlet, resulting in a lack of oil bushings, accelerating the wear between the turbo shaft and bushings. Therefore, the engine should be idling for about 3min before turning off the engine, so that the turbocharger rotor speeds down, its internal heat is fully discharged, the temperature is reduced.

03 How to choose engine oil?

Care must be taken when selecting engine oil. Due to the role of the turbocharger, the air quality and volume in the combustion chamber have a substantial increase, to obtain a higher compression ratio, the engine structure will be more compact and reasonable, but its work intensity will also be higher. This makes the turbocharged engine have a high temperature, high speed, high power, high torque, low emission characteristics of the work but also makes the internal parts of the engine withstand higher temperatures and greater impact, extrusion and other poor working conditions. Therefore, the oil used must have good abrasion resistance, high temperature resistance, high film strength and high stability.

04 Do engine oil and filters need to be kept clean?

Engine oil and filter must be kept clean to prevent impurities from entering because the turbocharger's rotor shaft and the bushing have a small clearance, if the oil lubrication ability decreases, it will cause premature damage to the turbocharger.

05 Does the air filter need to be cleaned?

The air filter should be cleaned at regular intervals to prevent dust and other impurities from entering the high-speed rotating compressed-air impeller, which may cause unstable rotation speeds or increase the wear of the shaft sleeve and seals.

06 Does the turbocharger need to be inspected? How to check?

The sealing of the turbocharger sealing ring should be checked frequently. If the sealing performance of the sealing ring deteriorates, exhaust gases will enter the lubrication system through its gaps to contaminate the oil and increase the crankcase pressure. In addition, when the engine is running at low speeds, the oil will also be discharged from the exhaust pipe through the sealing ring or into the combustion chamber combustion, resulting in excessive oil consumption or the "oil burning" phenomenon.

07 What should I check in the turbocharger?

Always check the turbocharger for abnormal noise or vibration, as well as for leaks in the lubricating oil pipes and fittings.

08 Can I repair the turbocharger damage by myself?

The turbocharger rotor bearings are highly precise, and the requirements for maintenance and installation are very strict, so when the turbocharger malfunctions or is damaged, it should be repaired at a designated professional repair station.