With the same displacement, is it a diesel car or a gasoline car that is polluting?

Diesel vehicles are polluting to the environment.

Difference Between Diesel Car and Gasoline Car:

1. The diesel engine is ignited, which is more than the gasoline engine.

With higher energy conversion, from the kinetic energy of the car, diesel cars have more advantages than gasoline vehicles, in terms of power, diesel is not volatile, high power, higher ignition rate, gasoline is relatively low.

2. In terms of the noise of the car, the diesel engine.

It adopts the compression-ignition ignition method, and its compression ratio.

It is twice as loud as a gasoline engine, so the noise of a diesel engine is relatively loud, and the noise of a gasoline car is relatively smaller.

3. From the point of view of the convenience of refueling, gasoline cars are more convenient, only need to add the corresponding oil directly according to the oil number required by the car, when adding diesel, if the temperature is relatively low, diesel should be selected, the corresponding negative number diesel, to prevent freezing, and gasoline cars are more convenient in terms of convenience.

4. From the perspective of the service life of the engine, the structure of the diesel car is much simpler than that of the gasoline car, and the engine of the diesel car does not have an ignition system, which relatively reduces the incidence of failure, and will also reduce the cost of car maintenance for the owner in the process of use.

The difference between diesel and petrol is:

2. Gasoline is easy to mix with air, and the combustion will be more adequate after mixing; Diesel is not easy to mix with air, so the diesel engine is easy to burn inadequately, and if the combustion is not sufficient, some components will not be burned out, and black carbon particles will be emitted; But a diesel engine with mature technology and good combustion will not emit black smoke, and the smell is smaller than that of a gasoline engine.

3. Gasoline is relatively light, and the composition is a smaller molecule, and the carbon atoms contained in the molecules of hydrocarbon compounds.

There are about 8-10 units, and diesel fuel is 12-15 units, and when burned, the more carbon, the more energy is released when the combustion is sufficient, so diesel can provide higher energy compared to the volume of gasoline and diesel.

4. The compounds that are not fully burned by gasoline will be partially dissociated at high temperature, and the main emission is carbon monoxide.

Hydrocarbons and nitrogen oxides.

Diesel engines emit less carbon monoxide and hydrocarbons, particulate matter and nitrogen oxides.

It is the main substance emitted by diesel.

The most important exhaust pollutants from diesel engines are particulate matter (PM) and NOx (NOs account for about 90%). Diesel emissions also include a small amount of CO (a little higher displacement at high loads), SOX and HC.

A diesel engine is an engine that burns diesel fuel to obtain energy release. It was invented in 1892 by the German inventor Rudolf Diesel, and in honor of the inventor, diesel is represented by his surname Diesel, and diesel engines are also known as diesel engines.

The advantages of diesel engines are high torque and good economic performance. The working process of a diesel engine has many similarities with a gasoline engine, and each working cycle also goes through four strokes: air intake, compression, work, and exhaust.

However, because the fuel used in diesel engine is diesel, its viscosity is greater than that of gasoline, it is not easy to evaporate, and its spontaneous ignition temperature is lower than that of gasoline, so the formation and ignition of combustible mixture are different from those of gasoline engine. The main difference is that the mixture in the cylinders of a diesel engine is compression-ignited, not ignited.

When the diesel engine is working, it is air that enters the cylinder, and when the air in the cylinder is compressed to the end, the temperature can reach 500-700, and the pressure can reach 40-50 atmospheres. When the piston is close to the top dead center, the fuel injector of the fuel supply system injects fuel into the cylinder combustion chamber at extremely high pressure in a very short time, and the diesel fuel forms fine particles.

Mixed with high-pressure and high-temperature air, the combustible mixture burns by itself, violently expands to produce explosive force, and pushes the piston down to do work, at this time the temperature can reach 1900-2000, the pressure can reach 60-100 atmospheres, and the torque generated is very large, so diesel engines are widely used in large-scale diesel equipment.

Neither can compare who pollutes the most. In terms of harmful gases, there is definitely a lot of pollution, and the pollution of gasoline engines is concentrated in sulfides.

and nitric oxides. Diesel engine pollutants are mainly particulate pollution. The emissions of the CO Nox CH compound in a gasoline engine are significantly higher than in a diesel engine, while the carbon emissions.

is significantly higher than gasoline engines.

From the point of view of environmental protection, the same displacement of diesel engines, in carbon dioxide.

Emissions of carbon monoxide and hydrogen compounds are indeed much lower than those of gasoline engines. However, due to the difference in the composition of the diesel engine, it will directly lead to several times more respirable particles and nitrogen compounds in diesel engines than gasoline engines, which is the primary cause of urban exhaust pollution**.

Diesel engines are more polluting. Diesel vehicles account for 60%-70% of the total number of diesel engines in Europe, and the diesel engines are vertically fired due to the pressure of the wild cherry blossoms. The compression ratio is larger, the thermal efficiency is higher, and secondly, the carbon monoxide and hydrocarbon emissions of diesel are only a fraction of that of gasoline, but the nitrogen oxide emissions of diesel are much higher than those of gasoline.

According to the 2013 China Motor Vehicle Pollution Prevention and Control Annual Report released by the Ministry of Environmental Protection, only cars that meet the National IV standard and above, China III standard cars, China II standard cars, and China I standard cars account for the car. The rest of the cars do not meet the national standards.

Diesel and gasoline fuels are different in nature.

1.Diesel compression ratio is high, for the same cylinder, gasoline and diesel consumption, because diesel compression is more complete, in a stroke, diesel burns longer and more fully (which can be understood as pushing the piston movement trajectory longer), so the efficiency is higher, which is why diesel tachometer is lower than gasoline.

2.Diesel is direct injection in the cylinder, which can be directly compressed and ignited by cylinder compression, and how much is sprayed with gasoline, while gasoline is unstable, and it needs to be mixed with air in a certain proportion before entering the cylinder, and then ignited in the cylinder, because the proportion is placed there, no matter how much is used, it is mixed so much, so the fuel economy is low. If you look at the enthalpy entropy curve, one is isochoric combustion and the other is isobaric combustion.

No, this needs to be determined according to the kinetic energy of the car, not all diesel cars will be very fuel-efficient, which has no scientific basis.

Yes, because it often does not need to consume too much diesel when it is used, and the ** of diesel is relatively low, it is also very convenient when using it, and it will not produce waste.

There should be no way to compare who pollutes more. As far as harmful gases are concerned, gasoline engines must be polluting, and the pollution of gasoline engines focuses on sulfides and nitrogen oxides. Diesel engine pollution focuses on particulate matter pollution.

The emissions of CO Nox CH compounds in gasoline engines are much higher than those of diesel engines, while the soot emissions of diesel engines are much higher than those of gasoline engines.

In the same case, only PM of diesel engines is higher than that of gasoline engines, while CO, NOX, CH and other emissions are much lower than those of gasoline engines.

Of course, the aftertreatment system is now in use, and the aftertreatment system for diesel engines is very different from the aftertreatment system for gasoline engines, and the emissions after treatment can meet the national requirements.

Diesel is more polluting because the extract is less pure than gasoline.

With the continuous optimization of diesel engines, they can be similar to gasoline vehicles to a certain extent in terms of environmental protection. When buying a car, you can reasonably choose the type of engine according to your own needs.

In terms of pollutant emissions, diesel emissions are generally just particulate matter, or simply carbon. Others, such as sulphur dioxide, tetraethyl lead, etc., emit very little. However, the pollutants in gasoline include carbon monoxide, hydrocarbons, sulfur dioxide, nitrogen dioxide, lead-containing substances, etc., so the pollutants contained in gasoline are more complex and more polluting.

Relatively speaking, due to the composition of the engine, the same diesel, the same gasoline, the output horsepower of diesel is larger, therefore, the consumption of diesel under the same working conditions is less, so the pollution emission is relatively less. This is the first one. In terms of emissions, an engine with the same output horsepower consumes less than gasoline, so it emits less.

In layman's terms, this is low-carbon.

Therefore, in terms of energy conservation and emission reduction of old carpets, diesel oil is more environmentally friendly than gasoline. However, due to the cost problem, the cost of diesel engine and related parts is higher than that of gasoline engine, with large volume and high noise. Therefore, it is impossible to pour a gasoline engine from a computer hang-up!

In addition, the explosive power of the super engine is very small, so it cannot be used in vehicles that require sudden explosive power, such as sports cars.

Attached: The difference between diesel vehicles and gasoline vehicles:

1.Diesel engines are ignition engines that have a higher energy conversion than gasoline engines. From the kinetic energy analysis, the diesel engine needs to have more advantages than the gasoline engine. In terms of power, diesel is not volatile, has high power, high ignition rate, and gasoline is quite low.

2.In terms of car noise, diesel engines use compression-ignition type, and their compression ratio is twice that of gasoline engines, so the noise of diesel engines is quite large, and the noise of gasoline vehicles is quite small compared to gasoline engines.

When adding diesel, if the temperature is quite low, you need to choose the corresponding negative diesel to avoid freezing. In terms of convenience, gasoline cars are more convenient.

4.From the perspective of the service life of the engine, the structure of the diesel car is much simpler than that of the gasoline car. The engine of the diesel car does not have an ignition system, which shortens the failure rate compared with the gasoline car and also shortens the maintenance cost of the partner in the process of use.

The above is all the content that Bian Xiao Auto shared with his friends. So, after reading it, is it environmentally friendly diesel or environmentally friendly gasoline? Do you have a basic understanding of this problem?

Isn't it helpful to read this knowledge? Finally, I hope that the sharing of the car side Xiao can help friends.

With the gradual strengthening of public environmental awareness, the emission technology and standards of automobiles are also gradually improving. The discussion about the hazards of automobile exhaust has not stopped. The thermal efficiency of diesel engine is higher than that of gasoline engine, greater power, long life, and better power performance, and it is widely used in the engine of large vehicles, so the serious automobile exhaust pollution of diesel vehicles has attracted much attention, and NO2 accounts for about 90% of NOx emitted by diesel engines, and NO2 is only a small part of it.

World Health Organization experts announced that diesel engine exhaust is as carcinogenic as asbestos, arsenic and other substances. It can be seen that the pollution of diesel vehicles is still relatively serious. With the improvement of people's environmental awareness, the strong growth of new energy models such as hybrid vehicles and pure electric vehicles, the status of diesel vehicles and the market share of mayors are rapidly declining.

But in real life, the latest report on diesel emissions has dealt a fatal blow to the European diesel car market, which is already in crisis. Diesel was once considered a "clean" fuel at the cost of a shocking low CO2 emission per kilometre compared to gasoline, widely advertised as "clean".

Through the Volkswagen Group Dieselgate incident, it was found that there is a high price behind low CO2 emissions. Diesel vehicles are very harmful to humans, and the emissions of nitrogen oxide disorders are several times higher than the emission standards, and automakers such as Volkswagen use cheating software to ensure compliance with emission regulations when testing in the laboratory, but allow vehicles to freely emit harmful substances while driving on the road. Other car manufacturers insist that their vehicles meet laboratory standards.

Even though there is a lot of evidence that this behavior is illegal, car companies still exist.

Large-scale research is particularly necessary before the new world light vehicle test procedures can be implemented in Europe. Using innovative remote sensing techniques, the International Commission on Clean Transportation (ICTWC) has conducted a study on the spectroscopic principle of determining vehicle emissions as a vehicle passes through a line of light. They also use statistical analysis to measure and report actual emissions from cars in the EU.

For this study, the International Commission on Clean Transportation developed a grading system called true, which shows the actual emissions of cars compared to NOx emission standards. The true rating summarizes about 10,000 small test results.

Trucks, trucks, and incomplete test results are excluded.

In fact, the emissions of diesel vehicles are not very serious, because diesel vehicles need to add urea, which purifies the exhaust gases.