Huaian Huaian diesel exhaust treatment agent wholesale car urea was there early, cooling technology has made great strides in the late 1970s and 1980s. First there is water in the cooling system for the air cooling system, it can be air entering the engine is reduced to about 98 degrees Celsius. It is the air through the evaporator the air is cooled. But the engine temperature itself is high, the degree of cooling air can get is limited. The use of a separate water circulation system in the cold, since the use of low temperature cooling water, charge air cooling effect so good, but you need to set a separate cooling water system, so it can only be used for stationary industrial diesel engine or marine engines. Air to air intercooler started in the early nineties. It is piped through to a separate inflator installed in front of the radiator, the use of cooling air is mounted on the diesel engine cooling fan supplied. Because heat is transferred directly into the air, so that more efficient heat exchange. In addition, as there is no involvement coolant cooling cycle, so there is no leakage of coolant into the engine cylinder danger. Turbocharger allows the engine to produce more power. Air is actually a turbocharger compressor. The engine is by fuel combustion in the cylinder to generate power for power, the amount of fuel input by the amount of air sucked into the cylinder within limits, the power generated will be limited. Turbocharger to improve the combustion efficiency of the engine by increasing the amount of air supply. Increasing the air pressure and density can burn more fuel, a corresponding increase in the amount of fuel and adjust the engine speed, you can increase the output power of the engine. Turbocharger turbine chamber and the booster is composed of a machine, turbine room air intake and exhaust manifold connected to an exhaust port connected to the exhaust pipe; turbocharger air inlet duct and air cleaner connected to the exhaust port connected to the intake manifold. Turbocharger without changing the working volume of the cylinder case can be improved more than 10% of the output power of the engine. Turbocharger and intercooler application allows the engine to meet the European II emission standards. The most promising technology is the exhaust gas recirculation technology. Exhaust gas recirculation system (EGR) is cooled by the engine exhaust back again in the combustion chamber to reduce nitrogen oxide emissions purposes. When the exhaust gas with the fresh air and fuel mixture, the peak combustion temperature is reduced, thereby reducing the nitrogen oxide emissions, but causing an increase in particulate matter and hydrocarbon emissions. So the exhaust gas recirculation system should be used in conjunction with particulate trap. Exhaust gas recirculation system on petrol and diesel cars is already very mature technology. "Diesel Technology Forum," pointed out: This technique can also be applied to heavy-duty diesel trucks. And the system must have support electronic control system in order to achieve a state based on the engine to optimize emissions, fresh air and fuel mixture ratio of purpose. "International Automotive News" magazine pointed out exhaust gas recirculation technology as a development of the technology is very promising. Exhaust emission regulations and engine performance requirements continue to increase the need for internal engine, electronic control systems and post-processing systems for continuous improvement and integration to achieve our ultimate goal. The introduction of environmental taxes will become one of the government tax policy in 2008 focused on advancing. Formulation of specific research by the Ministry of Finance Tax Policy Department, National Tax Administration of Local Tax Division and State Environmental Protection Administration Policy and Regulation Department three departments jointly proposed the introduction of environmental taxes three options (January 6, "Chongqing Daily"). One of the most concern, but also the most puzzling is the pollution tax, in some detail, is that vehicle emissions tax levy, imposed the principle of "polluter pays", the tax base is directly related to the amount of pollutants. I want to ask is whether to impose a pollution tax, the living environment and quality of life can be improved, air quality can be improved, we can reduce the emission of pollutants? Vehicle emissions tax levy later, people will drive less, or not driving, thereby reducing vehicle exhaust emissions? The introduction of car pollution tax, whether here what would constitute obstruction automobile industry, because the current high oil prices, many of the original case has been ready to buy a car on the sidelines. We are now bought a car, people are using the car in auto emissions tax levy after, they will not put their cars do not stop there, do not drive, but switch to buses do? In reality, we certainly can not be ruled out because the car was too costly, and thus reduce the use of cars, but car owners will have their own an account, that is, since bought a car, of course, would be useful, If tens of thousands of cars do not put in there, as scrap metal pile, as decoration, it would mean more waste? Thus, although the national introduction of the vehicle emissions tax, car or want to use, and never will stop there when the display instead of, as is now very high fuel prices, we see where the car because of high oil prices and the disabled the? So, even if the introduction of auto emissions tax, does not reduce car use, it does not reduce automobile exhaust emissions. Therefore, national authorities levy this tax, in fact, would not achieve the role of environmental protection, but a new increase in the burden of taxes citizens, dressed in a cloak of legitimate arbitrary charges. If your car's emissions will cause air pollution, the state should fail to intercept before entering the car market, cars are not allowed to produce non-compliance, improve the access threshold for automobile production, when consumers buy a car, have been paid the travel tax, has the right to use national standards, emissions standards on the formal market to buy cars. If the principle vehicle exhaust emissions tax levy, the tax levy for improving air quality, according to "who benefits pays, user pays", the introduction of this new tax, there is a certain rationality. Or levy new taxes such purpose, it is questioned on. As countries in some scenic spots introduction of environmental taxes, but do not put the tax were to go to the real environmental protection, the protection of the environment of these places, but into the pockets of a few units or departments to form a new corruption. Free to levy new taxes, the tax levied not disclose its usage is refusing to pay the citizens. Over the years, new tax increase, expanding sources of tax revenue, state tax gone up year after year, the income of citizens, but the microscopic income, GDP growth continues to rise, CPI rose constantly increasing, but the income of citizens is not always catch the country's economic development speed. As the saying goes, river water stream full, and now the river is not only water, but also skyrocketing, "Province and the enemy," "City can be the enemy province", but the small river water is not gone up, the country strong and the people are not rich, national authorities but also continue to develop new sources of tax revenue, keep off from the pockets of citizens do not pay again, this is not a country should have the responsibility of governing the people practice.