Why is the Diesel Ban important?

The Odd-Even experiment is long gone but the Supreme Court of India has ordered that the ban on registration on new diesel vehicles with an engine capacity more 2000cc must remain till April 1, 2016.

diesel car

This ban follows more or less the same logic as the Odd-Even experiment; it is centered around the degrading air quality in Delhi. But it is more than just this debate, and that is where the ban becomes important. The plea to remove the ban was put forward by leading automobile manufacturers such as Mercedes, Toyota and Mahindra & Mahindra. The idea being put forth is that new diesel engines do not pollute more than petrol engines because they are designed based on a “new technology”.

Diesel-driven vehicles account for over 90 per cent of SUVs in the country, 34 per cent of small cars and 70 per cent of large/medium cars. With so many diesel cars on the road, and the exponential increase in the market in recent years, they are under scrutiny for good reason.

Although, traditional literature claims that diesel engines pollute less, that isn’t exactly the case. Diesel engines emit lesser carbon monoxide, carbon dioxide and hydrocarbons. However, they produce more particulate matter than petrol engines. Most diesel engines now use catalytic converters for engine efficiency (and reduced emissions). The converter is most efficient at temperatures above 250 degrees Celsius. Here lies the second problem; most vehicles don’t achieve the 250 degrees needed by the catalytic converter. Which is probably why  a report from the Norwegian Centre for Transport Research found that a modern diesel car pumps out more toxic pollutants than a bus or heavy truck.

The amount of time it takes for the diesel engine to warm up to that level is mostly only achieved by buses. And buses don’t use catalytic converters.

Another factor to examine is the quality of diesel fuel with respect to the amount of Sulphur, which is often much higher than acceptable.

Though most manufacturers claim that diesel engines are fitted with an exhaust re-circulation system (to burn partially burnt exhaust from the engine and reduce emission), the system itself is pretty expensive. Most manufacturers also wouldn’t make a profit by designing engines with higher injecting pressures.


Therefore, it isn’t unnatural to assume that the diesel ban is also a challenge to automobile manufacturers to prove that they live up to the promises made by them with regard to their technology. Following the VW scandal, the ban is a test for the manufacturers and, in a larger sense, to the corporate profit-making mindset that disregards safety norms. And that is why the diesel ban is so important.



What’s the Volkswagen scandal and how it affects Indians

As discovered in a study in the US, Volkswagen had introduced a software in its Type EA 189 engines that enabled them to pass emission tests. But on the road, these cars emitted pollutants up to 40 times above what is allowed. Basically, the software recognizes when a car is being tested and switches on the car’s emission controls. But when the car is on the road, the controls are switched off and this results in increased pollution.


Which cars in India are affected?

In India, Volkswagen sells Polo, Polo GT, Cross Polo, the new Vento sedan, and Jetta. Out of these, the 1.5-litre turbodiesel Polo and the Vento use the Type EA 189 engines.

What happens if my car is affected?

For now, Volkswagen hasn’t clarified if Indian cars have been affected or not. In case they are, Volkswagen may recall these cars to modify the software. As the violation involved enabling emission controls during testing, but turning them off under normal conditions to improve performance, the software update might impair a car’s performance and fuel economy.

Why should I care?

Because if you own a car, Volkswagen or any other, ensuring that it meets emission standards is your responsibility. Indian cities are already amongst the worst polluted cities in the world and if we want to continue living here, it’s up to us to maintain a clean environment.

How can I check if my car is compliant?

You can drive up to your nearest Petrol Pump, most of them have Pollution Check Centers which can give you a Pollution Under Control Certificate. There are over 388 centers for petrol/CNG vehicles and 273 centers for diesel vehicles in Delhi NCR.
You can also give us a missed call at 9717356939 or mail us at fix@carpm.in to get your car checked. While we aren’t authorized by the Govt. to hand out P.U.C certificates (nor will we), we can certainly come over and thoroughly test your car to check its performance. We’ll also give you a detailed report of your car’s overall health, and decode your car’s Check Engine Light if it’s on, all completely FREE!

Do share this with your friends who have a Volkswagen or a badly performing car!