New Motor Vehicle Exhaust Gas Detection Technology In Use Will Open Pick

Not only can detect the amount of pollutants emitted from vehicles

, but also to ultimately Network Real-time monitoring, and moderate cost, which is new in the use of vehicle exhaust gas detection technology?? Simple Transient detection (ie Vmas). Held at the June 3 "in motor vehicle exhaust testing new technologies with the association," on car exhaust in the detection of well-known domestic experts agree that, in order to effectively control the total amount of pollutant discharge in the vehicles, to ensure no deterioration in air quality and gradually improved, the state should promote the universal application of this technology.

Car after running a period of time, car Engine State of technology change. The results show that, in general, the car running by 80,000 km, CO (1 Oxidation Carbon), HC (hydrocarbons) and NOx (nitrogen oxide) emissions will be multiplied,, CO, HC The most significant increases.

Environmental Sciences and Tsinghua University Project Professor, Director of the Institute of Atmospheric Pollution and Control introduces Phillipson, motor vehicle emissions from the actual use of all of the Vehicle The so-called the car. A high-emissions car emissions vehicle can reach more than 10 times normal. International experience has shown that detection of these high-emission vehicles and targeted focus on governance, is to reduce the total pollutant emissions in the car the most effective way. Among them, the science of detection is the key, and only able to detect the approach of total emissions in order to truly and accurately identify high-emission vehicles, to control and reduce pollution overall purpose.

Early as 1993, China set to detect the emission of pollutants in single-car idling laws and limits. However, this standard applies only to Carburettor Vehicles, and can not effectively identify the use EFI And catalytic converter technology vehicles exceeding the emission situation. To this end, China in 2005 issued the "spark ignition engine exhaust emission limits and measurement methods?? Two-speed idle conditions and easy method", provides a nationwide two-idling law enforcement, and recommended use of condition monitoring methods.

But in fact, two-speed idle HC and CO can only detect the concentration of NOx emissions can not be detected. The only simple method to condition on Motor vehicle emission Release of the three kinds of pollutants HC, CO and NOx to conduct a comprehensive inspection. Simple method

conditions, including simple steady state, transient conditions law and simple method three kinds of transient conditions. Some cities in China began in 2001, pioneered the use of a simple condition method, but limited to conditions at the time, usually using a simple steady-state method. This method can only detect the concentration of pollutants, can not detect the total vehicle emissions, and the detection accuracy rate of only 65%. The law also because of transient conditions of high equipment costs, maintenance can be complex and not widely used.

Present, China has developed a simple upgrade technology Transient (Vmas) method, and in Shanghai, Shandong, Guangdong, Liaoning, demonstration and application, experience and maturity achieved significant results. The detection accuracy rate of 95%, repeatability is very good, and can detect vehicles and the total amount of pollutant emission factors, and thus the total control of pollutants in urban cities provide a scientific basis, and also online networking can be achieved function, thereby achieving the scientific testing and Management Purposes.

New Motor Vehicle Exhaust Gas Detection Technology In Use Will Open Pick

By: sisi

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