These car tips, you are also a half automotive expert!

Today, the boys at RepairHub has put together some common-sense knowledge in the use and maintenance of automobiles, sharing it with everyone, learning and studying together.

What is the relationship between the number of engine cylinders and engine speed? There is no direct relationship.

But generally speaking, under the same bore, the more the number of cylinders, the greater the displacement, the higher the power; under the same displacement, the more the number of cylinders, the smaller the bore diameter, the corresponding increase in speed, and thus obtain greater power.

Next, lets understand more about the wheelbase.

What is the influence of wheelbase on the length? Wheelbase refers to the distance between the front and rear axles. It will affect handling performance, minimum turning radius, body stiffness, interior space, chassis passability, and more.

Why should I turn off the negative pole when power is off?

Because all the control units, actuators, negative battery wires, and switches of the vehicle are grounded by the vehicle body. In other words, after disconnecting the negative electrode of the battery, even if the tool hits the line of fire, it is not afraid that the short circuit will be caused. If the positive battery cable is disconnected, a short circuit may occur between the battery positive electrode and any point of the vehicle body. Hence, it is very dangerous!

What are the characteristics of the automatic transmission M, D, S?

After shifting the D range and shifting the shift lever on the driver's side, the shift from D to S mode can be performed. If the shift lever is moved forward/backward at this time, the M mode can be entered from the S mode. D mode: ordinary automatic wave D file; S mode: In the sport mode, the gearbox will only change the high gear when the engine is at a high speed, and the gearbox will not be hung up to the top gear (speed gear); M mode: hand wave mode, press +/- button to manually add or subtract gears.

Why is it that white smoke is coming from the car ?

When the exhaust gas at a high temperature is exhausted from the exhaust pipe, it emits heat when it encounters cold air and condenses into water vapor to form white smoke. This is a normal phenomenon.

What is the reason for the low water temperature?

It may be common for the thermostat to open incorrectly (normally open) or the cooling fan to work abnormally (usually at high speeds). There may also be other possibilities that require specific analysis of specific issues. Water temperature is not a good thing! There are mainly the following hazards: Engine temperature is too low, too much heat is absorbed from the cylinder wall, thermal efficiency and output power are reduced, and fuel consumption is increased. If the engine temperature is too low, gasoline will not easily evaporate, making combustion difficult. At the same time, some petrol droplets will scour lubricant on the cylinder wall and flow to the oil sump with the lubricant.

What is the impact of dirty gasoline on the car? How to solve?

Dirty gasoline will have a great impact on the car's fuel system, resulting in blockage of gasoline, poor fuel injector injection, and failure of the fuel pump. This will increase oil pressure, poor atomization of the fuel, engine shake, and fire, and the power will drop. Oil can also increase carbon deposition. Not only the engine will be affected, poor gasoline will also seriously damage the three-way catalytic converter, once the three yuan catalyst is blocked, there will be no power, exhaust pipe abnormal sound and other issues. If it is an iron petrol tank, the petrol tank will be rusted due to the large water content of gasoline, which will increase the adverse effects on the fuel system. Solution: It is recommended that you only add fuel to large, well-respected gas stations, add high-quality oil, and regularly replace gas grids. It is best to clean the fuel tanks and nozzles on a regular basis.

This is the end of the first part of the article! Stay tuned next week for the second half of the article!!!

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