The cold winter has come. Do you consider the problem of engine preheating when you start the machine? For those excavator drivers who still fight in the cold winter, do you remember the problem of engine preheating when you start the machine every day? Once the engine is heated up to winter, it becomes a hot topic. So in this cold winter, let's talk about engine preheating.
When it comes to engine preheating, I believe a lot of excavator drivers will say that almost all excavators now have preheating devices. In fact, no matter what car, it's good to preheat 35 minutes before starting. And what's the advantage of the engine preheating today is the benefits of the engine preheating, so what are the benefits of engine preheating? How should we preheat the engine? Let's give a brief introduction.
First, the benefits of engine preheating.
1, diesel engine preheating can make diesel engine burn more fully, reduce pollutant emissions and prolong the service life of diesel engine after startup.
2, the preheating of diesel engine can make the lubricating oil pumped to various operating parts in time, so that the machine can be effectively protected by the oil film, and then the service life of the engine is extended.
3, the preheating of the diesel engine can make the thermal expansion of all components of the engine reach the same level, thereby prolonging the service life of the engine.
Two, why the engine needs to be preheated.
1, diesel engine diesel engine at low temperature, the atomization effect will be reduced, especially for the electric spray diesel engine, preheating will make the diesel atomization better, diesel combustion more fully. And the inadequately atomized fuel can not be fully burned, and easy to form carbon. In addition, no atomized diesel oil is easily along the cylinder wall. The direct inflow of the crankcase is mixed with the oil to reduce the quality of the oil. For a direct injection diesel engine, although the fuel pressure in the cylinder can be fully atomized, it does not mean that the direct injection diesel engine does not need to be preheated, then second.
2, when the diesel engine is installed overnight, the oil film protection has been lost on the friction surface, and the low temperature will increase the viscosity of the lubricating oil greatly, the adhesion and the fluidity are poor, which makes the lubrication effect lower. And the normal idling preheating can make the lubricating oil form the effective oil film protection in each part and reduce the production of dry grinding. It also prolongs the life of the engine. This is necessary for both direct injection diesel engines and EFI diesel engines.
3, when at low temperature, especially when the temperature is below zero, the antifreeze is not frozen, but the temperature of the antifreeze is also below zero. At this time, the thermal expansion of the components of the engine is not consistent according to the principle of heat expansion and contraction, and the gap between the components of the generator is not in the best state. At this point, it is easy to cause the failure of the cylinder, the smoke abnormal and so on. When the engine is idle, the thermal expansion of the engine parts can be consistent. In general, the preheating device of the diesel engine has the function of preheating antifreeze.
Three, precautions for preheating of the engine.
1, both the EFI diesel engine and the direct injection diesel engine need to be pre heated.
Because the purpose of engine preheating is not only to fully burn the fuel, but also to increase the temperature of the antifreeze.
2, the engine preheating time is not as long as possible.
If the car is hot for a long time, the diesel engine will do useless work, which is not only a waste of fuel but not environmentally friendly. It is generally suitable for a diesel engine to preheat 3-5 minutes before the start of a diesel engine.
3, try to avoid multiple start and long startup in the condition of cooler.
The multiple start of the diesel engine will aggravate the wear and tear of the moving parts and reduce the service life of the engine and the engine. According to the authoritative study, more than 50% of the wear of the engine is caused by the cold start. The cause of the wear is due to the failure of the lubricating oil to achieve the performance of the engine, so the reduction of the number of cold start will extend the start of the engine. The service life of the machine.
4, when the engine is warming up, check the relevant components and running conditions of the engine.
When the engine is preheated, it should be checked to see if the indicator on the dashboard is normal. It should listen to whether the engine has a different noise and see if the engine smoke is normal.
5, see the tachometer to judge whether the idle speed is normal.
In general, the machine hand only needs to see whether the tachometer is normal or not. Because the thermal expansion of the machine does not reach the same, the automatic governor will think that the engine load is larger and the speed will be higher naturally. When the speed is normal, it means that the thermal expansion of the machine reaches the same time, so it can be recognized at this time. The preheating of the fixed machine has been completed.
Summary: engine preheating has become a hot topic every winter. In fact, in fact, the engine preheating is not only in winter, but also in the summer, but it needs to be preheated in winter, and the summer preheating is short. So the problem is, does your excavator preheat when it starts?
