What does the car mean in China 3 and 2, and the difference between China 2 and China 3?

The most for your own car is the country, the simple and direct is to look at the vehicle's environmental protection logo, and there are obvious marks behind the logo.

If it is a new car, it can be viewed in the vehicle factory certificate. However, the general vehicle certificate is kept in the vehicle management office. Therefore, when buying a new car, it is recommended to make a copy and keep it so that you can view the relevant information of the vehicle later.

A rough identification is made based on the year of the license plate on the car.

1> Most of the cars after 2008 are China IV;

2> The cars licensed in 2007 are some of them in China III and some are in China IV;

3> Cars before 2007 were basically below the fourth national level, that is, the national level.

Second, the third car;

4> Cars before 2005 were basically China II cars;

refers to the national motor vehicle exhaust emission standard, China II, that is, the national motor vehicle exhaust emission No. 2 standard; National III, that is, the No. 3 standard.

Other than that. There are also Euro 2 and Euro 3, which are the European motor vehicle exhaust emission standards.

It refers to the exhaust emission standard, and the National IV standard is the highest.

1. The difference between the national three engine and the national two engine lies in the content of harmful substances emitted by the engine's exhaust, and the national three engine is lower than the national two engine.

2. From the structure of the engine, the engine supply system is different, and the emission of harmful substances in the engine exhaust is also different.

3. Compared with the national first-stage emission standard (referred to as the national 1 standard), the "National 2 standard" reduces the emission of carbon monoxide by 30.4% and hydrocarbons and nitrogen oxides by 55.8% compared with the national first-stage emission standard.

4. The implementation of the "National Three Standards" can greatly reduce the pollutant emissions of bicycles, and the total amount of pollutants emitted is about 40% lower than that of vehicles that meet the "National II Standards"; Second, the on-board emission diagnosis system is installed, so the emission of a single vehicle is lower and the impact on the atmospheric environment is smaller.

The difference between the third and the second is the displacement, the function of the main body of the car has not changed, the vehicle is upgraded to the third (Euro III) is the World Environmental Sanitation Organization's requirements for the exhaust of the vehicle to reach zero emission, how to achieve zero emission, first of all, change the quality of the fuel injection, if the injected oil can be fully atomized and combusted, it will definitely be less polluted than in the past, so now many vehicles will be imported with fuel injectors, and a small number of cars will import the entire oil pump together with the fuel injector, in fact, this is the difference, It is also a selling point that some automakers may use this opportunity to improve the construction function of the vehicle. Users who use China III may think that the vehicle has no strength, which is a misunderstanding that China III engines need to be checked and troubleshot by computer. At the same time, the computer can also limit the function of the vehicle, and the vehicle will slowly enter the normal after driving 5000 kilometers.

China's emission standards are completely formulated in accordance with the European emission standards, that is, Euro 3 = China 3 Euro type certification and production consistency emission limits.

Vehicle Category Benchmark Mass (RM) kg Limit g KMCO HC NOX PM

Gasoline engine diesel engine gasoline engine non-direct injection diesel engine direct injection diesel engine non-direct injection diesel engine direct injection diesel engine.

Category 1 vehicles all.

Class 2 1st Class RM 1250

Level 2 1250 RM 1700

Level 3 1700 RM

European type approval and production conformance emission limits.

Vehicle Category Benchmark Mass (RM) kg Limit g KMCO HC NOX HC NOX PM

Gasoline engine diesel engine gasoline engine gasoline engine diesel engine diesel engine diesel engine first class car all.

Class 2 1st Class RM 1305

Level 2 1305 RM 1760

Level 3 1760 RM

The main emission standards are different, and the requirements of China III are higher.

At present, the world's automobile emission standards are divided into European, American, and Japanese standard systems. The European standard test requirements are relatively broad, and it is the vehicle exhaust emission system that is mostly used in developing countries. In addition, since most of China's car models import production technology from Europe, China generally adopts the European standard system.

Country 2 = Euro 2 Country 3 = Euro 3 Country 3 means National Vehicle Emission Standard No. 3, Emission Standard: Automobile emissions refer to CO (carbon monoxide), HC NOx (hydrocarbons and nitrogen oxides), PM (particulates, soot) and other harmful gases emitted from exhaust gases. China's national emission standards are based on European standards.

European exhaust emission standards for gasoline vehicles (reference).

Standard Euro Euro Euro Euro Implementation Time Before the end of 1995 1995-2000 2000-2005 From the end of 2005.

hcco 4%

nox 8% 7% 5%

PM: European Diesel Vehicle Emission Standards (Reference).

Standard Euro Euro Euro Euro Implementation Time Before the end of 1995 1995-2000 2000-2005 From the end of 2005.

The three countries of the automobile country four refer to the exhaust emission standards.

On July 1, 2001, China issued China's first-stage emission standards with reference to European emission standards, followed by the country.

II. Country. 3. Min Jianguo.

Fourth, China V, each stage is more stringent than the previous stage of the emission standards.

Introduction of the third Dan Bu country IV:

The China III emission standard is the abbreviation of the national third-stage motor vehicle pollutant emission standard. The national three standards were implemented nationwide on July 1, 2007. From July 1, 2008, all cars with a maximum gross mass of 3500kg will be implemented according to the "National III Standard".

The National IV emission standard is the abbreviation of the national motor vehicle pollutant emission standard in the fourth mold stage. Gasoline vehicles produced after July 1, 2010 are basically the China 4 standard. Diesel vehicles manufactured after July 1, 2013 are all China 4 standards.

After July 1, 2013, it is forbidden to license cars in China III.

China IV requires that on the basis of China III, the pollutant emissions of light vehicles should be reduced by about 50%, the emissions of heavy vehicles should be reduced by about 30%, and the emissions of particulate matter should be reduced by more than 80%.