How to judge the quality of an engine?

As an engine maintenance technician who is a sunshine craftsman, you will tell you: a good engine must not have obvious oil leaks, water leaks, and air leaks in the first place. There is no jitter at idle speed of the starting engine, good acceleration, and no abnormal noise of the engine.

Open the lid of the water tank, whether the water circulation is normal and good. When the engine accelerates, the exhaust pipe smoke is normal, and there is no black smoke and blue smoke. Check the cab instrument, whether the oil pressure is within the specified value, and whether the water temperature is normal.

In addition to looking at the fuel combustion in the combustion chamber from the dripping water of the exhaust pipe, we can also judge the good or bad of the engine according to the outer surface of the engine, the sound of the engine when it is running, and the state of the engine operation. If your personal judgment is not accurate, it is recommended to go to Sunshine Craftsman to have a look, where the staff has a good attitude and is professional.

Engine conditions, that is, the working conditions of the engine, are mainly characterized by the output power and torque of the engine at different speeds.

The engine is basically divided into eight working conditions: starting, after starting, warm-up, idling, partial load, full load, transition, and support.

All working conditions are fully monitored and controlled by the computer. Neutral coasting is an idle condition with the throttle closed and the crankshaft speed low. Coasting with gear is a supporting condition.

When the accelerator pedal is completely released under the bracing condition, the computer knows from the idle switch that the vehicle has turned into an idle state, and the crankshaft speed is still very high to know that the vehicle is in the bracing condition, at this time, the computer will first delay the ignition time to reduce the engine power consumption, and then stop the fuel injection according to the speed. Generally, there are three speed points in the ECU: oil cut-off, recovery and emergency recovery. When the rpm is higher than the cut-off point and the throttle valve is closed for a period of time to stop injecting, the rpm drops to the recovery point to resume injection, and if the rpm drops sharply (such as emergency braking), the injection starts at the emergency recovery point above the recovery point.

This process can be clearly observed in some cars with a trip computer (such as Bora, Golf).

You can come out from the outside, and you can see if there are some traces of oil leakage or water leakage. And you can smell the smell or look at the color, if the code is light gray, then it means that there is no problem with the engine, but if it is black, then it means that it is not tuned well. It can also be distinguished from the sound or from whether the appearance is clean and whether it is oil-related.

It can be judged from the feeling when driving, if the kinetic energy is very good for the car to drive, it can also be judged by the sound, the engine is not a problem when the sound is normal, and it can also be judged by the ignition of the rental time. If the engine stalls frequently, there is a problem with the engine.

The first is to look at the car when starting, listen to the noise of the engine, if the noise is very loud, it means that the engine of the car is not very good, and secondly, you can also judge the quality of the engine according to the fuel consumption. Finally, it is also possible to judge the quality of the engine based on the power hidden in the driving process of Genzhou Ridge.

You can see the quality of the engine from the sound, dynamics, price, appearance, interior, manufacturer, and quality.

By looking at the size of the engine, there is also the sound of its start, you can see its quality, a good engine should be Yinqing should be a small size stupid car, and the sound is also very small.

It is the heart of the engine. Whether a car can be driven well depends mainly on the quality of the engine. As long as the engine is ***, there is nothing wrong with this car. Conversely, if the engine is not good, the car will continue to break down. How to look at the quality of the engine?

Everyone knows that the exhaust pipe of an ordinary car is installed in the rear of the car. Unless there is an exhaust pipe in front or on the side of a car with a large cabinet, of course, the exhaust pipe can be understood as a side. If you can't read it from the front, the exhaust pipe is usually a moving car or bus that will be mounted on the side.

If the exhaust pipe is installed in the front, the car may not allow you to go on the road and does not meet the standards of a car, so it will not let you go on the road. I'll deduct yours.

As mentioned above, the location of the exhaust pipe is an important location for venting the exhaust gases produced by the combustion of the oil. The quality of the engine depends on the dripping water of the engine and the exhaust gases emitted by the engine. Of course, let's take a look at the dripping of the engine first, many bigwigs know very well that the dripping of the exhaust pipe has something to do with the engine.

Then we now come to the relationship between the engine and the drip. Exhaust pipe dripping is an excellent performance of the car. If there is black smoke, it will only be emitted if the fuel is not burned enough.

If there is black smoke and the smell of combustion, it's time to let the engine burn oil. If there is white smoke, it means gasoline or water in the tank. However, when the exhaust pipe keeps dripping, it's not the exhaust pipe that is faulty, it's that your engine is in good shape.

This is the key to starting and dripping at the tail.

Look at the car to drive first, then step on the accelerator, get out of the car and look at the exhaust pipe. Whether there are water droplets or not does not mean that the more water droplets, the better. Conversely, more water droplets, means your coolant has entered the combustion chamber.

Another possibility is that too much drainage from the exhaust pipe can affect the oxygen sensor, causing your starting air intake to drop.

Another point is that in life, when your speed reaches 120kmh, it means that the gearbox has reached the top gear. Normally, when your speed reaches 120, your speed will reach more than 2000.

When you find that the speed of your car is lower than this, it is very responsible to tell you that your car engine is good and you have bought the right car. The more gears the gearbox, the more comfortable the driver will be. So when you find out that the speed is 120, the lower your engine, the better the quality of this engine.

Whether the car is good or not depends on the engine. After all, the engine is the heart of the car. So dear car owners, come and test it! However, Bian Xiao wants to remind all car owners to pay attention to safety and drive cautiously.

<> "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 following is the method of judging the quality of the engine: 1. Look at the engine speed, generally speaking, the engine speed between 2500 and 3000 is a more suitable engine speed. In the case of the same 120 miles, the more expensive the car, the lower the engine speed may be.

The engine speed of a car with hundreds of thousands of cars is generally around 2800, while the speed of a car with 300,000 may drop to about 2400. If the engine of the car exceeds 3000 rpm, it can be clearly felt that the noise of the car is significantly louder than that of a normal car. 2. Engine material is related to quality

The density of aluminum is small, and the engine made of it is naturally light, and the weight of the car equipped with the aluminum engine becomes lighter, which greatly ensures the power efficiencyThe aluminum used is very resistant to high temperature and corrosion, and the effect of ventilation and heat dissipation is also betterThe physical properties of aluminum itself give good ductility and are more malleable than cast iron, so they are more precise and delicate in the process. 3. The level of fuel consumption also reflects the quality of the engine, generally speaking, the engine displacement is positively correlated with fuel consumption, so the car with strong power cannot escape the title of "oil tiger", so that there is now a saying that "you can afford to buy a car, you can't afford to raise a car", but with the continuous progress of technology, the correlation between engine performance and fuel consumption is getting smaller and smaller. Fuel economy has become a very important parameter to consider a good engine.