The industry of  automobiles now started changing form BS-4 to BS-6. It made crucial for both manufacturers and customers because of the technical advancement. Let us take a look on the downsides of this technology.

Selective Catalytic Reduction (SCR)


It is used to convert nitrogen oxides which is coming from exhaust into nitrogen and water. It can be done only with the aid of a liquid called DEF (Diesel Exhaust Fluid). It should be changed in every 2000-3000 km since the tank capacity limited to 5-10 Litre. It will result in higher maintenance costs. At the same time low quality diesel and DEF causes damage to the engine.

Diesel Particulate Filter (DPF)

The carbon matters which is produced by the burning of fuel inside the cylinder is termed as Particulate Matter (PM). This particles sized one in a million of a metre and also a major pollutant. Thus, Diesel Particulate Filter is provided in order to reduce this particles. Regeneration is required to maintain the efficiency of it.

DPF Regeneration

It is the process of retaining the efficiency of DPF by  burning of carbon particles which is almost filled in the filter. To do this, it brought and burned in the DPF by injecting the fuel into the exhaust gases  which is coming out of the cylinder. But it requires a continous drive for 10-15 km at sufficient speeds which is too difficult in city traffics. If the regeneration is not performed well, it will affect the engine performance and eventually damage it.

Sensors


Unlike BS-4 vehicles which need only 7-10 sensors, BS-6 vehicles require 12-15 sensors. So it will reduce the reliability of the vehicles. In other word, risk of maintenance will be more if the BS-6 vehicles are  not maintained well.

These are the common factors which is challenging for both producers and users.