All you need to know about BS III and BS IV engines

BS III and IV are different norms to control the emission units from a vehicle
All you need to know about BS III and BS IV engines

For those who are planning to buy a new car or bike, please note that there are 80,000 cars and more than 4 Lakh bikes in the showrooms that you cannot buy due to he latest ban of BS III engines by the Supreme Court of India. Though it needs only a little bit of adjustment, these units will have to be recalled by the manufacturers to their respective warehouses.

The apex court in Delhi, announced that BS IV norms will be put to action from April 1 which in turn bans the registration of any vehicle under the BS III slab.

Bharat Stage and Euro standards | Courtesy: Wikipedia
Bharat Stage and Euro standards | Courtesy: Wikipedia

Though it sounds only like a different version of any other norm, what exactly is a BS IV engine and how different is it from BS III?

BS – Bharat Stage, is basically the emission standards set by the government of India to control the air pollutants emitted from the internal combustion engine. The standards set by the Central Pollution Control Board is applicable for all the vehicles running in the country. BS is similar to Euro standards in Europe and Tier 1, Tier 2, Tier 3 in America.

Emission standards for light utility petrol vehicle | Courtesy: Wikipedia
Emission standards for light utility petrol vehicle | Courtesy: Wikipedia

Bharat Stage norms are have been specifically styled for the Indian conditions. However, the standards are similar to those in the Euro III and IV. The major differences lies in the geographical and environmental conditions of the two countries. For example, Euro III was tested in sub-zero conditions which is the average temperature of European countries. However, the BSIII tests were conducted in an average temperature between 24 and 28 degrees. Another distinction is that the vehicles in India were tested at a maximum speed of 90 Km/h where as, the Euro tests were done at 120 Km/h.

Emission standards for light utility diesel vehicle | Courtesy: Wikipedia
Emission standards for light utility diesel vehicle | Courtesy: Wikipedia

India's auto sector is responsible for about 18 percent of the total Carbon dioxide(CO2) emissions in the country. These emissions have rapidly increased in recent years, but like the EU, currently there are no standards for CO2 emission limits for pollution from vehicles.

Emission standards for trucks and buses | Courtesy: Wikipedia
Emission standards for trucks and buses | Courtesy: Wikipedia

BS III specified a limit for emission of pollutants from a car which will now be more strict in the BS IV engines. The BS IV norms helps the customer get better mileage and the vehicles emits lesser pollutant gases.

Emission standards for two wheel petrol vehicles | Courtesy: Wikipedia
Emission standards for two wheel petrol vehicles | Courtesy: Wikipedia

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