The excavator engine often has trouble starting, which really annoys many excavator owners and bosses. So how to prevent the difficulty in starting the excavator engine? This article will tell you how to solve the problem of starting the excavator engine.
When it comes to engine preheating, I believe many excavator drivers will say that almost all excavators now have preheating devices. In fact, it is beneficial to preheat for three or five minutes before starting What the small editor of meiruite excavator maintenance plant wants to talk about today is the benefits of engine preheating. What are the benefits of engine preheating? How should we warm up the engine? Let's give a brief introduction.
Benefits of engine warm-up The preheating of diesel engine can make the diesel engine burn more fully, reduce the emission of pollutants and prolong the service life of the engine The preheating of the diesel engine can pump the lubricating oil to all operating parts in time, so that the machine can be effectively protected by oil film, thus extending the service life of the engine The preheating of diesel engine can make the thermal expansion of all parts of the engine reach the same, thus extending the service life of the engine
Why does the engine need to be warmed up It is easy to preheat the excavator engine to solve the problem of difficult starting. When the diesel in the diesel engine is at low temperature, its atomization effect will be reduced. Especially for the EFI diesel engine, preheating will make the diesel atomization effect better and the diesel combustion more sufficient. The fuel with insufficient atomization can not be fully combusted, and it is easy to form carbon deposits In addition, the diesel without atomization is easy to flow directly into the crankcase along the cylinder wall and mix with the engine oil, thus reducing the quality of the engine oil For the direct injection diesel engine, although the fuel pressure in the cylinder is very high and can be fully atomized, it does not mean that the direct injection diesel engine does not need to be preheated. Next, let's look at the second When the diesel engine is left standing overnight, the oil film protection has been lost on the friction surfaces, and the low temperature will greatly increase the viscosity of the lubricating oil, and the adhesion and fluidity will become poor, thus reducing the lubrication effect Normal idling preheating can make the lubricating oil form effective oil film protection at various parts, reduce the generation of dry grinding, and prolong the service life of the engine This is necessary for both direct injection diesel engines and electronic injection diesel engines When it is at low temperature, especially when the temperature is below zero, the antifreeze liquid will not freeze, but the temperature of the antifreeze liquid is also below zero At this time, according to the principle of thermal expansion and cold contraction, the thermal expansion of all parts of the engine is not consistent. At this time, the clearance between all parts of the engine does not reach the optimal state, which may easily lead to cylinder pulling and abnormal smoke. When the engine is idling and warming up, the thermal expansion of all parts of the engine can be consistent. Generally, the preheating device of the diesel engine has the function of preheating the antifreeze solution
Precautions for engine preheating. Both EFI diesel engine and DI diesel engine need preheating Because the purpose of engine preheating is not only to make the fuel burn fully and the antifreeze temperature rise, but also to make the lubricating oil form a protective film. The longer the engine preheating time, the better If the engine is heated for a long time, the diesel engine will be useless, which not only wastes fuel but also is not conducive to environmental protection. Generally, it is appropriate to preheat the diesel engine for 3-5 minutes before it starts to work under load. When the engine is preheated, check whether the relevant parts of the engine and the operation are normal When the engine is warming up, check whether the indicator light on the instrument panel is normal, listen to the engine for abnormal noise, and check whether the engine smoke is normal
