How long the engine has been used can be detected

The engine is the core of the whole car, if there is a problem with the engine then the car is paralyzed, it is important to distinguish between good and bad engines.

The first step is to look at the exterior of the engine. Check whether the fit with the fender or the gap left by the engine is consistent, whether the gap between the windshield is consistent, and identify traces of oil and water leakage.

The second step is to inspect the interior. Be a little more careful when inspecting the inside of the hood, as many hidden problems can be found here. When you open the hood, take a closer look at the inside of the hood to see if it has been painted.

Then check from the I-beam above the engine water tank and the two longitudinal beams or two inner side sub-beams below the engine body. In addition, whether the waterproof rubber strip is smooth is also the basis for judging whether the car is injured.

The third step is to 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. If there is an abnormal noise in the engine, such as a low "rumble" sound, it may be that the bearing of the engine is broken.

The fourth step is to start the engine when the headlights are on, if it still can't be started many times, maybe the battery is not enough power, or the starting system is faulty; Press the throttle again to increase the engine speed, if there is a "gurgling" sound, there may be a problem with the piston.

Finally, when you press the accelerator pedal after the engine starts, and it feels like it's slow, it's probably the fuel or the starting system.

Generally speaking, if you have a foundation, you can become a teacher in half a month, and if you have no foundation, you need to learn at least two or three months.

Yes, the engine comprehensive analyzer is an instrument that collects signals through sensors, processes them by front-end preprocessors, inputs them to the computer for processing, and outputs them in different forms, which can intuitively and conveniently detect, analyze and diagnose the engine. Analyze how long the engine took with the data.

The engine inspection date is the day or the next sunrise after the inspection is completed. An engine can be applied to both a power generation unit and an entire machine including a power unit. The engine was first born in England, so the concept of the engine is also derived from English, and its original meaning of wheel wheel refers to the mechanical device that generates power.

In-line engine

In-line engine, generally abbreviated as L, for example, L4 stands for in-line 4 cylinders. The in-line layout is the most widely used form of cylinder arrangement today, especially on engines with displacements below Lapaichang. All cylinders of this type of engine are arranged side by side at the same angle in a flat plane, and only one cylinder head is used.

At the same time, the structure of the cylinder block and crankshaft should be relatively simple, just like the cylinders stand in a column of sedan cars.

Specifically, we have four common numbers of L3, L4, L5, and L6 to represent the number of cylinders. The advantages of this layout engine are compact size, high stability, good low-speed torque characteristics and lower fuel consumption, which of course means lower manufacturing costs. At the same time, the engine with an in-line cylinder layout is also relatively compact and can accommodate a more flexible layout.

It is also convenient for arranging supercharger devices. However, the main disadvantage is that the engine itself is less powerful, and it is not suitable for models with more than 6 cylinders.

There are many aspects to check the engine, the mechanical part and the electronic control part.