How to identify the quality of the engine? How to see the quality of the engine

The quality of the engine of a mini vehicle is mainly evaluated from the aspects of stability, safety, and economy.

Most of the mini cars are domestically produced, so the technology used does not vary greatly. So we should pay attention to the practical performance of the engine... Other words.

1.The economic speed of the engine is not what this car accounts for most of the time when you are using it normally. (This is looking at its fuel economy).

2.Whether the torque output is large enough at low rpm.

3.The life of each component of the engine, the time of regular maintenance.

4.Whether the strength of key components is sufficient (e.g. connecting rods, piston pins, crankshafts, valves, etc.).

5.Then there is to look at the proportion of its electronic control equipment, the general foreign high-performance engine electronic control ratio has reached a considerable extent, while the domestic autonomous machine is much worse, maybe you will not look at how much electronic control is used, then count how many sensors, how many electronic actuators. Generally, the more sensors there are, the more thoughtful the engine design is, but of course its specific performance cannot be reflected in this regard!

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.

You want to buy an engine to install it, but I don't know how to call it, there is only one way to get him, in a variety of acceleration and deceleration situations, there is no abnormal sound under the load situation, easy to start, fire extinguishing simply, no leakage of oil, gas and hydropower, generally after meeting the above conditions, the situation of burning oil in this car must be very low, rest assured to buy it and install it at home

That's a bit of a general question. Let me talk about it in three ways:

1.Engine parameters, including comparing power and torque of the same displacement.

2.The technology used in the engine, such as in-cylinder direct injection, variable valve Shenma.

3.See what car it is applied to, and then go to the forum of the relevant car to see the evaluation and communication of the car owners.

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.

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 aluminum is naturally lighter, and the weight of the car equipped with the aluminum engine becomes lighter, which greatly ensures the power efficiency; The aluminum used is very resistant to high temperature and corrosion, and the effect of ventilation and heat dissipation is also better; The 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.