Manufacturing difficulties in BS VI engines.
Before knowing the difficulties in manufacturing. We go through the working of both petrol and diesel engine. The combustion occurs in the petrol engine is by the ignition of the spark plug which means the combustion happens by the external fire. Whereas in the diesel engine the ignition occurs due to the ionization of fuel by the fuel injector under the high compression ratio which means the ignition happens without any external aid. These happen because of the Cetane number and other natural quality of the diesel. In BS-VI we keep our hand to regulate the fuel by reducing Sulphur content about 5 times than BS-IV diesel. Because the Sulphur content in the fuel decides the emission of the NOX, SOX and other toxic gases. Unfortunately, the same Sulphur content helps to the lubrication of the fuel injectors in the diesel engine. Here the difficulty arises that if the Sulphur content rise means the pollution rise but the parts such as fuel injector get damage as soon as possible because of the lack of lubrication. By the way, the lack of lubrication in the diesel paved the way to the loss of fuel efficiency and other performance loss. This is the difficulties in the perspective of manufacturers. This problem asks the OBC (Onboard Diagnostics), RED (Real Driving Emission) and SCR (Selective Catalytic Technology) as a solution and this is the major reason for the cost of BS-VI is much higher than BS-IV. And the difficulty level to construct the good BS-VI diesel engine is higher than the Good BS-VI petrol engine because of its working methodology. So, the manufactures don’t face that much difficulties in the construction of the petrol engine. BS-VI doesn’t stress the petrol engine on that much is also the another reason to manufacture the petrol engine easily.