How to identify the advantages and disadvantages of various types of engines

Look at the manufacturer. Purely domestically developed machines don't need to look at the Santana level.

Look at the bore, displacement, and cylinder arrangement.

For example, the Ford Mustang machine V8 displacement.

Today teach you how to identify the quality of the engine, you can judge the quality of the engine we buy through the following three tricks, the following we follow the Chongqing Kathon excavator maintenance service department, to choose the following advantages of good engine, the following construction machinery maintenance master will explain to you in detail how to choose:

First: operation with load After the diesel engine idles for a period of time, gradually increase the speed and load carried, and use the dynamometer to determine whether its power can meet the requirements. Assuming that some of the underlying units do not have dynamometers, in the case that the power of the diesel engine cannot be measured, the operation statement attached to the diesel engine can be used to make a simple judgment.

This is due to the fact that the application statement often states the size of the equipment (such as water pumps, generators, agricultural machinery or other construction machinery) that should be matched according to the power output of the diesel engine. Therefore, it is only necessary when the diesel engine supporting the machine can shake the ground at the extra speed; The speed does not fluctuate high or low, and it can also approximate the power requirements of the diesel engine to reach the rules. It should be noted that the machine should continue to run for 2-3 hours, and there is no clear change in power before it can be recognized.

When carrying load, it is also necessary to check whether the coolant temperature and oil pressure are normal. Try again to see if the governor can be activated. The solution is to suddenly lose the machine and see if it can quickly restore the speed to the extra speed, which should be arrived within 15s.

In addition, we should also look at how much the maximum speed is after the speed is reduced. The maximum speed should be 110% of the additional speed in shallow conditions, which can be measured with a tachometer. Assuming that the above items meet the requirements, it can be assumed that the quality of the diesel engine being inspected is superior.

Second: diesel engine starting function.

Although a successful diesel engine is the most dreamy thing to start right the first time, sometimes it is not always possible to run smoothly immediately after the first start. At this time, it is not too late to clarify its poor starting function, and the first thing to reflect on is whether the preparatory obligations before the start of the diesel engine can be done. For example, whether enough diesel can be added to the tank, and whether there is excess oil in the oil pan, etc.

Assuming that all preparatory obligations are done well and the starting method is accurate, a diesel engine with superior function should be started and operated within three times, otherwise, the starting function is poor.

Third: the days when the empty vehicle runs for about half an hour at low or medium speed after starting. Then park, open the side cover of the cylinder block, and feel the bearing all over the ground with your hands, and the bearing temperature is below 80 (not too hot) as normal.

Under the premise that the local parts are in normal condition, they can continue to run at high speed. It should also be checked whether the oil pressure can be normal, the reading of the pointer on the gauge without the oil pressure gauge should be checked, and the oil indicator should float up in real time after the diesel engine without the oil pressure gauge, such as the S195 diesel engine, after starting. Assuming it doesn't float up, it states that the oil pressure is low.

In addition, it should also be inspected whether the cooling triviality can be superior, whether the operation can be shaken, and whether there can be knocking noise. In the mortal world, the diesel engine should only have a monotonous sound, which is caused by the bursting of gas in the cylinder. Assuming other noises, the diesel engine is deficient.

Agree with the upstairs, but it is impossible to quickly distinguish at the beginning, and the sound of the engine of each brand is also different.

Watch and listen first. Look at the appearance, neat, listen to the sound, no noise, the sound is mellow.

<> "How can you simply judge the quality of the engine.

The car appeared in 1886, and in the years after it was launched, it quickly gained a lot of people's love! Its travel can also make the long-distance travel shorter, so after the gradual development of the economy, the Chinese people are more and more aware of the benefits of vehicles. It can be said that the number of people buying cars is also increasing, but with the development of society, people also have a lot of requirements for the choice of cars, high-quality, high-performance, high-configuration vehicles are more popular with people than low-configuration vehicles.

So for a car, which aspect of the configuration can determine its quality?

In fact, for a car, I think the most important part of its body is the engine. As the "heart" of the car, the quality of the engine can also directly affect the quality of the car, so for the engine, how to judge its quality? <> "How can you simply judge the quality of the engine.

Maintenance Worker Motivation: 3 Ways, Simple and Practical!

1.The power and torque of the engine.

I believe that for some car owners, in addition to looking at the configuration of the vehicle when buying a car, they also have their own requirements for the choice of engine. The power and torque of the engine are also an important criterion for judging the quality of the engine, because the upper limit of these two values determines the performance of the engine, that is to say, when the power of the engine reaches the maximum, the speed is in general, then the fuel consumption of the engine is very low, and vice versa.

2.Exhaust pipes at the rear of the vehicle.

In fact, the exhaust pipe at the rear of the vehicle can not only play a role in eliminating exhaust gases, but also allow car owners to directly understand the quality of their cars. Because in the use of the car, the engine of the vehicle is constantly consuming fuel, if the fuel is fully burned at this time, the exhaust pipe at the rear of the car will not have water droplets, but if the fuel is not fully burned, there will be water droplets. Therefore, many cars let lead loss, and they will also use this method to judge the quality of their car engine.

3.The degree of vibration of the engine.

Most domestic car owners still have a small understanding of the engine, so most people are not clear about the degree of engine vibration that can feel the quality of the engine. Generally speaking, the vibration degree of the engine can prove the performance of the engine from some aspects, and the higher the vibration degree indicates that the life of the engine is shorter.

The engine looks at the appearance of the engine and identifies the traces of oil and water leakage. Ignite the engine and observe the color of the exhaust gas, if it is translucent light gray, it means that the engine is in good condition, if the exhaust gas is black, it means that the engine is not well tuned. In addition, it can also be identified by sound, which is generally a good machine with a crisp sound and a strong sense of rhythm, but there are also models with a lower design.

In short, the cabin must be clean and tidy, without oil leakage and oil leakage, and the sound rhythm is not chaotic. The engine oil should be viscous and free of metal dust, which shows whether the original owner loves and maintains the original car. Inspect the appearance and operation of the engine, inspect the appearance of the engine, and identify the traces of water and oil leakage.

Light the engine and observe the color of the exhaust gases. If the exhaust gas is translucent, light gray, it is in good condition. If it's black, the engine isn't tuned properly.

Blue indicates that the engine is tired. White indicates that the head gasket is about to be scrapped. In addition, if you smell the gas, a bad smell is a bad sign.

An engine is a machine that can convert other forms of energy into mechanical energy, such as internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, the internal combustion engine usually converts chemical energy into mechanical energy.

This question is a bit general, do you refer to the parameters of the engine, such as: number of cylinders, displacement, compression ratio, maximum power, maximum torque, etc., or do you refer to the difference between the actual performance indicators and design values of the engine?

Start the car first to see if the engine shakes much, and then listen to the movement.

If you want to know the quality of a car's engine, you should first look at the car's exhaust cylinder。If we find some water droplets on the exhaust cylinder, we can make a preliminary judgment that the car is still performing well. At least it can ensure that the car's engine burns well and the exhaust is very qualified, so many people will find it strange that if you only look at the water droplets, you can't know the quality of the engine.

Resulting in insufficient engine air intake. When looking at the water droplets emitted from the engine exhaust cylinder, you can see that there are some problems with the engine, so you can judge the quality of the engine. Judging the quality of the engine can be roughly distinguished from three points: power, fuel injection form, and manufacturing process.

As we all know, the engine is the heart of the car, and only the heart of the car can see that the engine has some problems, so you can judge the quality of the engine. Judging the quality of the engine can be roughly distinguished from three points: power, fuel injection form, and manufacturing process. "Heart"A functioning car can ride freely.

According to the exhaust pipe mentioned in the description of the topic, the mass of the engine is only one of them, only the combustion and emissions of the engine can be seen.

Determine whether the engine is burning normally through the exhaust pipe. If the exhaust port of the vehicle is dripping, it does not mean that our engine is broken, it reflects that our engine is burning well. If black or blue smoke is coming from the exhaust pipe, there may be something wrong with the engine.

Distinguish the quality of the new car engine when receiving the new car, open the cover to check the engine, the parts are tightly connected, the oil, water pipes, and various parts are connected without traces of leakage, water and oil are filled to the standard line, the wires are arranged neatly, the line card is complete, the battery money is firmly connected, and the horn sound is clear.

Press the clutch pedal, gear and reverse gear respectively, do not step on the accelerator, and smoothly release the clutch pedal to the half-joint position of the engine and transmission parts, the engine should not be turned off, there is no obvious shaking, and there is no abnormal noise. If it is an automatic gear, step on the brakes, hang reverse gear respectively, forward gear, release the brakes, do not step on the accelerator, the vehicle starts smoothly, the engine runs smoothly, the rotation is significantly reduced, the gear lever is to the gear position, and the brake is stepped on a few feet. Check again whether the engine water, oil pipe, brake, and clutch connecting pipes are leaking, and whether the position of the pointers of each table is normal, and the engine inspection is basically the same.

Engine exhaust is very important, it is as the engine is completely burned, exhausted, so from the exhaust you can judge whether the engine combustion is enough, which can be seen through the exhaust cylinder water droplets, if there is not too much black exhaust gas, then it proves that the engine performance is goodSo we have to check the amount of cooling water first, if there is too much water, it is likely to affect the oxygen sensor.

Mainly depending on the brand and displacement, the most common engine is three-dimensional and V-shaped engine, and generally luxury cars use V6 V8 and other models. The best way to identify it is to see that the cylinder block is made of the letter V.

Look at the quality of the engine, mainly to see whether its power is enough, and then to see whether it is imported or joint venture, in general, the quality of the imported engine is very good.

Our car engine is composed of many mechanical parts, as well as many electrical systems, generator starters, air conditioning compressors, directional boosters, etc. On driving our engines so that we can determine whether our engines are good or bad. Be sure to start from the first point, that is, listen to whether the engine is working normally.

The normal working sound of the engine is very stable and regular, and when it is described, it feels like a person's normal breathing, and it is an abnormal situation that is very stable to hold. The abnormal sound of engine work is mainly reflected in the sound of metal knocking and bearing abnormal noise. If, as shown in the picture above, we open the filler cap and find a noticeable white emulsion, or open the tank lid and find that there is oil or oil in the tank, then this situation is most likely our quality problem.

The failure of the engine before the de-beam caused the high temperature of the engine to damage our head gaskets. This state has a great impact on our engines, causing our engines to not run for a long time, or even for a short period of several hours. The engine is hot and the tank is short of water, which is important.

In this state, our engines are almost silent and run smoothly. However, once we run it at high temperatures for a long time, it will cause the tank to "boil". If it continues to be used, the engine will be directly damaged, the oil will burn, and our car exhaust will have a noticeable blue smoke.

Whenever we urgently refueled, the smoke was particularly noticeable and heavy. This is the case where our engines burn oil. You must know that once our engine burns oil, some parts belonging to our engine will be obviously aged, such as our valve seals or our piston rings and so on.

Also our oil-air separators, exhaust gas valves, etc. are damaged. In this case, we have to determine the exact cause of the burning of the oil, because in most cases, we need to overhaul the engine to solve this problem. The cost of engine overhaul is generally tens of thousands.

We are often given repair work for engine overhauls due to oil burning. It may be easy for us to fix, but for our customers, it takes a while and costs thousands of dollars. The above is how to judge the quality of our engine, and the judgment methods, experience and skills in these places hope to help you.