Abstract: The exhaust gas from engine combustion is one of the important sources of air pollution in urban and rural areas in China. This paper mainly discusses several measures to reduce the environmental pollution caused by waste gas.
Keywords: automobile exhaust environmental control
With the rapid development of China's automobile industry, automobiles
The number of cars has also increased dramatically, and cars have now become human beings.
An important means of transportation to improve social production efficiency,
It has improved people's quality of life. Cars are promoting economic development.
Prosperity not only brings convenience to people's lives, but also affects the environment.
The environment has brought negative effects. It gives human beings something to live on.
The environment has brought increasingly serious harm to engine combustion.
The exhaust gas in the back row pollutes the atmospheric environment. According to the system
Air pollution and automobile exhaust in big cities of China.
Reeling has accounted for about 85% of air pollution sources, global 10.
Among the cities with the most serious air pollution, China accounts for seven.
A. so, control automobile exhaust emissions and manage big cities.
Air pollution has become an urgent and important task in China.
Service.
Controlling automobile exhaust emission is a huge and complicated task.
Systems engineering is related to the design, manufacture and application of automobiles.
Use and maintenance are directly related to fuel quality. At the same time,
It is also closely related to urban traffic management and fiscal and taxation policies.
Close. We should seize every link that affects automobile pollution emissions.
Only in this way can automobile pollution emissions be effectively controlled.
1 Strictly implement national and local exhaust emission standards.
Quasi-regulation
Restrict automobile manufacturers through regulations and standards
And reform the repair shop, so as to upgrade the automobile manufacturing technology.
Technical level, especially the progress of emission technology. Since 2000.
Since 2000, China began to strengthen the control of automobile exhaust emissions.
The liberalization of efforts will implement the standards equivalent to Europe I throughout the country.
The first stage emission standard (referred to as "National One"), 2004.
Start to implement the second stage emission equivalent to Euro II standard.
Standard (referred to as "National II"). At present, the State Environmental Protection Administration has
The implementation countries of light vehicles have been announced since July 1 2007.
Ⅲ and Ⅳ (close to Euro V) standards. this
The implementation of these standards will pollute automobile exhaust.
Greatly reduced.
2. Improve fuel quality
Fuel quality and combustion process of automobile engine
The improvement of fuel quality is
One of the most important ways to control automobile emission pollution.
The first is to eliminate leaded gasoline, tetraethyl lead is a kind of low
1 gasoline antiknock agent that enters the atmosphere with exhaust gas passes through.
Excessive breathing or food chain enters the human body and accumulates in the body.
It causes various diseases, especially children and pregnant women.
It is extremely harmful and has been completely banned in China since July 1 day, 2000.
Stop using leaded gasoline. In addition, it is necessary to analyze the content of motor gasoline.
Sulfur content, olefin and aromatic hydrocarbon content and saturated steam.
The pressure is limited to reduce the generation of harmful gases, reducing.
Evaporation of gasoline. In addition, detergent is added to gasoline, reducing
Reducing gum and deposits is also a measure to improve combustion.
One. In order to further adjust the energy consumption structure and develop stone
Petroleum alternative resources can reduce automobile exhaust pollutants more effectively.
At present, some provinces and cities in China have begun to promote emissions.
Ethanol gasoline for vehicles, that is, 90% of vehicles use unleaded gasoline.
Adding 10% fuel ethanol to oil can replace 10%.
Unleaded gasoline for vehicles. Replace it with a part of fuel ethanol.
Lead-free gasoline for vehicles can improve automobile exhaust emissions, as well.
It has also improved China's energy structure and promoted renewable energy.
The development of energy.
3. Add additional exhaust purification devices.
The measures taken include installing catalytic purification equipment for tail gas.
Set, that is, with the help of catalytic converter, the catalytic converter and tail gas are discharged.
The released pollutants are produced by chemical reaction, which is harmful to human body.
The most common substance with direct harm is three-way catalysis.
Equipment. Adopt high-energy electronic ignition device, that is, through accurate
Control the ignition advance of gasoline engine and improve the ignition energy
Create ideal combustion conditions, thereby reducing the engine's
Pollution discharge. Electronically controlled fuel injection, soon
The air-fuel ratio of the engine is controlled near the optimal theoretical value, so
No matter what environmental conditions and working conditions the engine is in.
The concentration of mixed gas can be accurately controlled, so that gasoline can
So as to completely and fully burn, thereby reducing harmful components in the waste gas.
The content of the points.
4. Promote alternative fuels
Gases such as natural gas or liquefied petroleum gas are used as
Fuel instead of gasoline and diesel, because gas fuel contains
There are few impurities such as sulfur and nitrogen, and the combustion is complete, which can significantly reduce steam.
Vehicle emission, fuel system shutdown,
There is no fuel evaporation, so it is popular.
Gas vehicles are also known as clean energy vehicles and environmentally friendly vehicles.
The implementation and transformation of cars, green cars and alternative gas cars have become
It is one of the measures to control automobile exhaust pollution.
5 Strengthen the inspection and maintenance of in-use vehicles and implement I/M.
system
I/M system, that is, in-use vehicle inspection and maintenance system.
Through legislation, standards, scientific quality control, quality
Security system and management mechanism, and regularly carry out in-use vehicles.
Or irregular emission testing, found that excessive emissions of vehicles and
Vehicles that tamper with emission control devices shall be ordered to enter within a time limit.
Repair, so that the car in use to maximize their role.
Emission purification capacity.
Vehicle emission pollution is only an indicator of vehicle performance, not
There are many internal reasons for the signs of stability or deterioration.
On the other hand, for vehicles with excessive emissions, we should have a good experience.
The inspection technicians carefully checked it according to the operating specifications.
Measure, diagnose and identify fault points. When the corresponding fault is eliminated
At the same time, the relevant departments of automobile failure are also targeted.
Carry out serious inspection and maintenance work to restore the car to normal.
Constant working state, reducing and eliminating faults or parameters.
The emission caused by the change exceeds the standard.
Give priority to the development of public transport.
Develop public transportation and reduce urban areas, especially cities.
The center of traffic flow is to reduce the emission of automobile pollutants,
Effective measures to improve the quality of urban atmospheric environment. although
Great progress has been made in highway construction in China, and the highway system is gradually developing.
Step perfect, but still can't meet the rapid development of vehicles.
Need. The traffic jam problem is still very serious, and cities
Cars are often at idle speed, low speed, acceleration and deceleration.
Working in bad conditions has aggravated the situation in urban areas, especially
Air pollution on urban roads also causes energy.
Waste.
Widely publicize and improve drivers' awareness of environmental protection.
If drivers have a sense of protecting the environment, they all
Knowing how to drive a car can reduce exhaust pollution, I
Our environment will be greatly improved.
Vehicle emission control involves a wide range,
It needs the care and support of the whole society. Pay attention to emissions
Every link of control, every unit, every department, every
Every citizen should actively participate in supporting the control of automobile pollution.
System, so that reducing automobile exhaust pollution has become everyone's self.
Take action to protect and improve the quality of the atmospheric environment.
Work hard and create a beautiful home together.
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