Diesel engines are all oxygen rich combustion, how can there be carbon black

Diesel engine combustion, oxy-fuel combustion overall air excess may only be unevenly mixed, resulting in local hypoxia, which will accelerate the oxidation of soot and incomplete combustion components. Cause.

A general term for particulate matter emitted from diesel engines. It is mainly composed of black smoke, the fuel and lubricating oil components left after combustion, and the sulfur components in the fuel formed after combustion.

The black smoke is generated in the incomplete combustion state at low temperature, and the temperature and pressure are reduced at the same time in the later stage of the flame propagation in the cylinder, causing the fuel to be steamed and burned, and black smoke is produced.

Gasoline engines usually ignite the mixed gas mixture, so that the combustion process of incomplete combustion is short and the emissions are low.

The ignition method is different, the diesel engine is compression ignition, the gasoline engine is electric ignition, several strokes should be basically the same, basically the ignition point of gasoline is lower, and the ignition point of diesel is higher, resulting in the need for different ignition methods.

The gasoline engine is spark plug ignition and requires electricity

The advance angle of diesel engine fuel supply has a great impact on combustion, knocking the cylinder early, and there is no energy to emit black smoke when it is late, and the advance angle should be 18 degrees before the top dead center.

It's hard to knock on the cylinder early, and it's hard to start late.

In the past, gasoline engines used gasoline as fuel, and diesel engines used diesel as fuel; Gasoline engines are all electronic fire, diesel engines are not, and now, high-grade diesel engines are also electronic fire. Generally speaking, it is possible to change the burning of electronic lighters to liquefied gas, natural gas, and alcohol-based (alcohol-based gasoline is used in gasoline engines, and alcohol-based diesel is also called biodiesel due to diesel engines), but now it seems that taxis that are switched to natural gas are gasoline engines.

Both gasoline engines and diesel engines are internal combustion engines, the difference is that gasoline engines use gasoline as fuel, and diesel engines use diesel as fuel. Due to the difference in the physical and chemical properties of gasoline and diesel, (gasoline is light oil, diesel is heavy oil) and two internal combustion engines with different structures are derived.

It is a gasoline engine that uses burning gasoline to work, and it is a diesel engine that uses burning diesel to work... You can guess by looking at the name, right?

The gasoline engine is a cremation plug, and the diesel engine is compression-ignition.

The gasoline engine is fueled by gasoline, and the diesel engine is fueled by diesel. However, apart from the difference in fuel, there are the following differences between the two:

1.The gasoline engine is ignited vertically, and the fuel is ignited in the cylinder by an electric spark plug; The diesel engine is a slow compression ignition type, and the fuel is ignited by the heat generated by the compression of the air in the cylinder, that is, the air compression will increase the temperature, and the diesel will burn when the temperature of the compressed air is higher than the ignition point of the diesel.

Therefore, the structure of the diesel engine is simple. It is widely used in various machinery. Diesel engines in rural areas are started with a crank handle, and even a starter is not required. The circuit part can be left unattended.

Diesel is more difficult to atomize than gasoline;

Diesel per unit volume releases more energy than gasoline**, and the force is greater, which may also be related

However, there is another point, the internal combustion engine of this structure is originally called a diesel engine, but in fact, it does not necessarily use diesel.

It's like a gasoline engine can use alcohol or natural gas.

Atomization of diesel is difficult and not as easy as gasoline.

Because the evaporation and fluidity of diesel are worse than gasoline, so the diesel engine can not form a combustible mixed gas outside the cylinder like the gasoline engine so as to burn with a spark plug, the combustible mixed gas of the diesel engine can only be formed in the cylinder, that is, when approaching the end of the compression stroke, the diesel is injected into the cylinder through the fuel injector (at this time, the cylinder is mainly hot air), and the small oil droplets of diesel fuel are heated, evaporated, diffused, and mixed with air to form a combustible mixed gas, and finally spontaneously ignited and burned.

I'm not asking about the principle of the engine! The fuel is delivered in a sealed cylinder, and the piston is pushed to work by compressing the gas and burning and expanding, which is converted into mechanical force! Summed up in four words: thermal energy conversion!

I had enough to eat and hold on to calculate this thing.