For climate change with sharp rise in temperature，Many car owners will find that their cars have knocking。The engine vibration increases significantly when the engine is cold，There will also be an obvious feeling of pushing the valve during the interval。Many friends think this is caused by carbon deposits in the engine，Just go to the repair shop to do a carbon exhaust，There are also some friends who believe that a car must explode to be considered a real explosion。

The accurate criterion for classifying engine knocking is the pressure imbalance during engine power，Sharp fluctuations in a short period of time can be counted as detonation。Under influence on the engine，The hazard of explosion is the greatest of all hazards。

First, let’s take seabet logina look at several causes that can cause engine knocking

1. Carbon deposition

Carbon deposit is a carbon-glue mixture caused by insufficient fuel combustion in the engine for a long time，Standing in the combustion chamber for a long time，Continuously participating in each round of combustion work will form carbon deposits over time，This kind of thing is very scary，Carbon deposits are relatively hard when the car is cold，It will occupy the top dead center part of the cylinder’s compressed air and also cause the cylinder to be jacked，Top valve, etc.，At the same time, it will also corrode the cylinder and piston over time，It is a serious disease in the car。The vibration problem of the top cylinder of some cars is caused by carbon deposition，The surface of carbon deposits is high temperature，Can cause premature ignition，Seriously affecting the engine resulting in insufficient combustion，Friends of car owners gradually feel that the fuel consumption is high when using the car，The power is not enough anymore，That’s the problem

2. Ignition advance

The reason why the engine has power，Completely compressed gasoline and air mixture，The conversion of power is achieved by igniting the explosion and pushing the piston。Then during the compression process，Isn’t it a very bad thing that the piston ignites before it reaches top dead center？Very conspicuous，Insufficient compression ratio caused by early ignition，It will also perform work on the piston in the opposite direction，Causing severe engine vibration in a short period of time。In this case, the power is not only seriously reduced，Fuel seabet ioconsumption will soar。

3. Gasoline quality

There are two aspects to quality here，The first one is whether the octane number of gasoline meets the standard，The second is whether the cleanliness of the gasoline meets the standard。The octane number represents the anti-knock index of gasoline、If there is no major problem with the engine，Insufficient fuel anti-knock index，Sudden pressure fluctuations。Insufficient fuel cleanliness can cause more than just carbon deposits，It will also damage the oil system。

4. Engine temperature is too high

It is said that behind every traffic regulation there is a thought-provoking story，One of them is to stop and rest after driving for more than four hours，This not only refers to people, but also refers to cars。In an environment with high engine temperature，The oil-gas mixture will burn prematurely when it encounters the high-temperature cylinder wall，This insufficient combustion environment will cause carbon deposits and knocking to occur at the same time，Seriously affecting engine power。

So what can be done to avoid these problems?

First，Go to Lala Expressway often，It is easy to eliminate problems such as carbon deposits when driving at high speed。

Next、Choose good quality fuel products，Of course the editor here is talking about the gasoline brand, not the gasoline label。

Don’t think your physical strength is okay，You can’t drive，Let the car rest if necessary，The car and the wife are the same，All need maintenance。