Exhaust Emission Index (EEI) represents emission rates of air pollutants that a car or vehicle causes. Vehicles emit a variety of different gases and toxins when the engine is running. Therefore, higher these emissions, the poorer the air quality would be. These emissions include carbon dioxide (CO2), carbon monoxide (CO), hydrocarbons (HC), atmospheric air particles, water vapor, and many compounds released from incomplete combustion of fuels. That is why big cities with more vehicles on the road have bad air quality than the areas where vehicle congestion is less, such as villages or hilly areas. Exhaust Emissions Index (EEI) is created to measure these emissions (mainly CO and HC). Let us know more about it in detail.
Recently published in the Proceedings of the Royal Society, the study is conducted by a research team led by Rajeev Kumar Mishra (Assistant Professor- Department of Environmental Engineering). He said, “The EEI, such as the current PUCC, is based on two parameters: CO and HC. What distinguishes it from the traditional PUCC is that the EEI seeks a range of emission amounts rather than specific figures. EEI is based on various mathematical formulae that evaluate a car’s state based on how much CO and HC it emits and, as a result, recommend a variety of solutions or directions to improve the vehicle’s health”.
Formulated by the researchers at Delhi Technological University, it is a new concept to measure or assess the performance of petrol cars and other vehicles. Exhaust emission control, EEI is created on the basis of various mathematical equations, EEI grades the vehicle’s health rather than providing test results along the lines of a conventional Pollution Under Control (PUC) Certificate. The concept involves a quick assessment of the cars based on the emission parameters. These parameters include:
The study’s supervisor stated that they followed AQI construction principles in the design of the EEI and that the team created the categories accordingly. The researchers stated that, in recent years, the AQI has been the most sought-after figure, even by the general public, and that it can readily determine if the ambient air quality is safe or harmful. As a result, it aids in the implementation of preventive measures.
Just like the AQI (Air Quality Index), EEI will help in identifying and predicting how polluting their cars are. Each spectrum will suggest steps to maintain their cars in the longer state of compliance or help them maintain their cars.
When we measure the AQI, along with the AQI levels, we also get health advice on the basis of those levels. Just as the AQI, when EEI is measured, we get advice on the basis of those levels. Determining the EEI will help majorly in;
PUC stands for ‘Pollution Under Control’ Certificate. This certificate states if your vehicle is safe to drive on the roads and would not contribute to the rising air pollution. In order to get PUC certified, a PUC test is conducted. for your vehicle. In other words, it means that your vehicle emissions are under control and as per the pollution standards. Therefore, if your vehicle successfully undergoes PUC test, it is eligible for the PUC certification, otherwise not. Exhaust emissions need to be kept in check so that the vehicle does not contribute to the outdoor pollution.
Only in recent years has a more complete picture of the health effects of exhaust emissions emerged, as the ability to assess and monitor human exposures within populations has developed. As a result, stricter laws are enacted to decrease public health risks connected with motor vehicle pollution.
According to a study on the ‘Health and Economic Impact of Air Pollution in India,’ air pollution is responsible for 18% of all fatalities and a loss of 1.4% of GDP in 2020. During peak pollution months, transportation contributes between 13 to 18% in pollution hotspots such as Delhi.
Corporate Avg. CO2 Emissions | Phase |
<130 gm/km | Phase l (Till 2022) |
<113 gm/km | Phase ll (Post 2022) |
Pollutant | BS-IV | BS-VI | Reduction(%) |
NOx (Diesel) | 250 mg | 80 mg | 82% |
NOx (Petrol) | 80 mg | 60 mg | 25% |
Hydrocarbon + NOx | 300 mg/km | 170 mg/km | 43% |
PM (Diesel) | 25 mg/km | 4.5 mg/km | 68% |
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