The price of diesel cars are increased.because fuel prices are expected to increase in the immediate future. It is important to know which cars will be able to stretch a liter of diesel the furthest.Diesel powertrains are no longer viewed as faithful workhorses.Instead are seen as the glacier melting root of environmental evil. With the advent of BS6 emissions, diesel in India still remains a popular choice for customers. Now built safeguards which would give polar bears a stay of execution. It all comes to technology called diesel particulate filter.It fits into diesel powered exhaust systems to make BS6 compliant. In order to limit the amount of these matters discharged by diesel motors, brands are required to fit a diesel particulate filter.
It traps the soot,before the enforcement of emission norms ,freely discharged from exhaust. However it gets burnt off,broken down into small particles and then dispersed in the air. When driving at low speed,DPF can get clogged with particulate matter . It leads to undeliverable. The exhaust is not hot enough to initiate burning off the soot. Apart from having DPF,this filter has thermal regeneration burns off collected soot.The burning off is far more conductive to long drives. BS6 diesel have safeguards to artificially heat up the exhaust and burn the soot. DPF was introduced as part of euro 5 emissions norms. Once DPF reaches maximum capacity, ECU in a car is programmed to allow burning of the soot.
We can learn some important things about BS6 diesel cars. It’s been 2 years since the BS6 pollution laws came into force. It mostly affected the diesel engine. Normally in a fuel compression, carbon dioxide and nitrogen gas ,water comes outside through the exhaust. Nitrogen and water are harmless materials. Hydrocarbons are released because the fuels do not burn well.
Carbon monoxide ,Nitrogen oxide,particular metals are other materials. These can cause a variety of diseases. It may cause cancer and shortness of breath. These sorts can be seen like fog in Delhi. Nox can cause acid rain. Diesel engines produced it more than petrol engines. In BS4 diesel engine Nox limit is 250 mg / km,PM limit is 25 mg / km.
In BS6 diesel engines have Nox limit – 80 mg/km,PM limit – 4.5 mg /km. Bs4 Petrol engine Nox limit is 80 mg/ km and pm has no limit. In BS6 petrol engines,Nox limit is 60 mg/ km and pm limit is 4.5 mg/km.In petrol engine it has no problem.
Let us see what has been done to reduce diesel engines. It is called EATS ( Exhaust After Treatment System). It includes DOC,DPF,LNT, ASC,SCR and DEF.DOC (Diesel oxidation catalyst),DPF (Diesel particulate filter) LNT (Lean Nox Trap),DEF (Diesel exhaust fluid)SER (Selective catalytic reduction),ASC (Ammonia slip catalyst).DPF and DEF are more dangerous than others.DPF filter particular factors or soot from exhaust gas .These are very small particles.DPF used to trap 1 micron size particles. It has 1micron holes. It is in a steel case.
It doesn’t allow the air to pass straight .Two types of materials are used to make these DPF. They are Cordierite and silicon carbide. Cordierite is made with magnesium, iron, aluminum and silicon. It prevents the passages of the particles. It is automatically cleaned. Filter regeneration is used for this type of cleaning. There are 3 types.
- Spontaneous regeneration – automatic cleaning
- Dynamic regeneration- They inform us about the cleaning and we should provide a situation.
- Service regeneration – cleaning of technician
Spontaneous regeneration occurs when the exhaust temperature is high (600°)and increases the engine RPM. If the Spontaneous regeneration isn’t done,it will be blocked and ECU shows a warning light. Sulphur is 50ppm in BS4 and it reduced 10 ppm in BS6.
If the temperature is below 600°,it causes the blockage. You should know the usage,capacity of the vehicle before taking BS 6 diesel vehicles. Otherwise it may cause damage. Some vehicles have parked degeneration.
catalytic oxidised and converted the dangerous chemicals to the normal chemicals. Nox emission is high in diesel vehicles. Nox is high in perfect engine condition. Nox can be reduced by the help of DEF and SCR. You should concentrate on DEF leve. You can see the warning sign .