First of all, these two refer to the motor vehicle emission regulations. Beijing Six refers to Beijing's local emission regulations, which mainly refer to the California emission regulations; the national six refers to the national emission regulations, which are mainly for reference. European emissions policy was formulated.
1. What is the name of “Jing†and “Country� So why is Beijing Six so famous, is it because Beijing’s emissions regulations are famous? Of course not. In the early years, that is, in the past, our domestic emission regulations have not yet formed certain rules. Beijing refers to the California's emission regulations, which is the current Beijing 5 regulations, which are extremely strict on motor vehicle emissions. Even more than the country five.
Well, why should Beijing Six stop and give way to the Sixth National Congress, in addition to the upcoming National Six in terms of regulations over Beijing Six, and China needs a unified set of standards.
In fact, technically, there is another point. The European test system referenced by the National Sixth is a set of steady-state systems, that is, vehicles can be detected on the assembly line. The test method of the Beijing-based reference to California is more focused on The dynamic test solution is the transient emission value of the vehicle during driving.
So what are the factors that affect this emissions, of course, one is the quality of the oil burned by motor vehicles, and the other is the emission technology of motor vehicles. Then let's take a look at the fuel and emissions technologies.
2. According to statistics from Longzhong Petrochemical, according to statistics from Longzhong Petrochemical, the current Chinese crude oil tax ratio is 47.2%, while the US tax burden is only 10.68%, which is why China's oil price exceeds 1.6 times. . From the quality point of view, China produces low-cost, low-quality catalytic gasoline, and it accounts for 80% of the total, the quality is far lower than the hydrocracking gasoline commonly used in Europe and the United States.
In fact, the current oil labeling in China is now changed from the previous 93, 97 to the current 91 and 95, and a new type 98 has been added. Compared with the oil products currently used in the United States, the number is 87, regular, 89 is silver, and the highest is only 93, gold, and not as high as 97 and 98. Gasoline, what is the reason?
What is the meaning of these labels, that is, the ratio of the actual gasoline explosion resistance to the antiknock of the standard gasoline, that is, the higher the gasoline number, the better the explosion resistance. When you see this, many people will think, in order to improve the anti-explosion, the higher the label, the better?
This is of course the same. What kind of gasoline is added depends on the compression ratio of different engines. Specifically, in general, the compression ratio of 7.5-8.0 should be used for gasoline of 90-93; the compression ratio of 8.0-8.5 should be The gasoline of 90-93 is selected; the compression ratio is 8.5-9.0, and the gasoline of 93-95 should be selected; the compression ratio should be 95-97 gasoline at 9.5-10.0.
In addition, the above mentioned anti-explosion, what is the meaning, that is, the phenomenon that the gasoline burns in the engine cylinder and causes the pressure to rise sharply and cause the cylinder to vibrate. Then what is the hazard of this knocking, the lighter will cause the vehicle power to drop? Increase noise, and the heavy one will damage the engine. Of course, we don't have to worry too much about this knock. In the current engine technology, our average users will not encounter it unless you modify it to get the high power of the car.
3. What are the engine technologies for improving emissions?
The main harmful gases emitted by automobiles are usually CO, HC, NOx and particulates. The particles here are the kind of PM2.5 that we are more familiar with recently. So what are the technologies to improve engine emissions?
The specific technical details are not mentioned. The main technologies are engine fuel injection technology, lean combustion + direct injection technology, turbocharging technology, variable air intake technology, exhaust gas recirculation technology, and three-way catalytic technology. Fuel vapor emission control and more.
Among them, different manufacturers of variable intake technology are different. For example, Toyota is VVT-I, called continuous variable valve phase system, Honda's VETC, Mitsubishi's MIVEC means variable valve phase and valve lift. Agency.
Finally, in the face of the most stringent emission regulations in history, many cars will not be able to get on the road. When buying a car, please be sure to consult the car's emission standards in detail, don't buy it wrong!
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