Hello Everyone,
The Bharat Stage 6 norm has been implemented
in India from 1st April, now every vehicle which is to be sold in market
comes with the Bharat Stage 6 norm compliant engine.
A
government of India has taken an initiative towards the green environment and
reduce CO2 percentage the new Pollution Norm is made compulsory.
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Mahindra Trucks ATS Layout |
There is difference between
BS6 fuel and existing BS4 fuel is that the BS6 fuel contains 5 times fewer
sulphur traces (10 parts per million) compared to BS4 (50 ppm). NOx (Nitrogen
Oxide) level will be brought down by a staggering 70% for Diesel engine and 25%
for Petrol Engines.
I have
Experienced all Hindustan Petroleum Fuel Stations across all over India are
ready with BS6 fuel.
So what is new in the BS6 Engine and what is
the technology used to emit cleaner emissions from Tail Pipe.
· BS-VI will definitely be going to bring a drastic change in the
automotive market in India.
We will get more fuel efficient and very low emission producing vehicles
in near future. Downsizing and down speeding will yield smaller and powerful
engines. Diesel vehicles will get more expensive as they required more after
treatment to stay clean. This will attract OEMs towards alternative fuels and
hybrid technologies.
Indian driving speeds are less than European driving speeds, hence it is
difficult to achieve temperature which is necessary to operate particulate
filter. Hence domestic tire-I and tire-II suppliers have great opportunity to
innovate new engine technology and emission control technology suitable to
Indian driving conditions.Through all these efforts people can ensure
significant reduction in air pollution from automobiles. This will bring
remarkable improvement in air quality in highly populated cities as automobiles
are main source of air pollution in cities.
To achieve emission limits specified in BS-VI ample amount of engine
electronics will required. This will enhance business of domestic and MNC
automotive electronic suppliers. Vendors and engineering solution providing
companies for Eco testing, fuel system testing and emission testing are also
going to benefit a lot.
The BS6 brings along a plenty of changes, most significant being the
mandatory OBD (Onboard Diagnostics) for all vehicles, right from motorcycle
upto Trucks.
Introduction of DPF (Diesel Particulate Filter) and SCR
(Selective Catalytic Reduction) for Diesel engines even in cars which will
be having extra AdBlue/Diesel Exhaust Fluid Tank.
Also, Some OEM can fit Digital Data Recorder Devices as a Standard
Fitment in their Vehicles which will help Manufacturer to Understand Driving
Patterns and Real time Performance of Vehicles.
Regeneration Pattern will be different from OEM to OEM.
WHAT WILL BE THE NORMS AND
PERCENTAGE OF POLLUTANTS?
Petrol Engine Emissions:
·
HC - NO change
·
NOx - 25% Reduction than
existing
Diesel Engine Emissions:
·
HC + NOx - 43% reduction in
BS6
·
NOx - 68% reduction
·
PM - 5-Fold reduction.
How do BS6 Diesel Engines work?
The SCR unit reduces NOx by converting it into two harmless products –
nitrogen and water vapour. SCR, which is housed in BS6 diesel engines, uses
AdBlue or diesel exhaust fluid to minimize NOx emissions. AdBlue is roughly
composed of two parts de-ionized water and one-part urea. When AdBlue comes in
contact with exhaust gases formed as a result of combustion, the urea gets
converted to carbon dioxide and ammonia. The ammonia, produced under the
influence of catalysts in the SCR core, converts NOx into water vapour and
nitrogen.
WHAT WILL BE CHANGED IN
POWERTRAIN?
1. In CRDI
Engine it will be with Variable Geometry Turbocharger.
2. Highly Complicated engines with advance Variable Geometry Turbocharger and Sensors.
3. EGR (Exhaust Gas Recirculation) + SCR (Selective Catalytic Reduction) both will be compulsory.
4. For Nitrogen Oxide NOX Control: SCR (Selective Catalytic Reduction) System (Closed Loop) must be used.
5. PM (Particulate Matter) Control: DOC (Diesel Oxidation Catalyst) + DPF (Diesel Particulate Filter) will be used.
6. Ammonia slip catalyst.
7. Three-way Catalyst.
2. Highly Complicated engines with advance Variable Geometry Turbocharger and Sensors.
3. EGR (Exhaust Gas Recirculation) + SCR (Selective Catalytic Reduction) both will be compulsory.
4. For Nitrogen Oxide NOX Control: SCR (Selective Catalytic Reduction) System (Closed Loop) must be used.
5. PM (Particulate Matter) Control: DOC (Diesel Oxidation Catalyst) + DPF (Diesel Particulate Filter) will be used.
6. Ammonia slip catalyst.
7. Three-way Catalyst.
Functions:
1. Diesel
Oxidation Catalyst (DOC):
·
Formation of
NO2 for CRT effect in DPF.
·
Catalytic
Combustion of Hydrocarbons for regeneration.
2. Diesel
Particulate Filter (DPF):
·
Separation of
Soot and Ash.
3.
Hydrolysis Catalytic Converter:
·
Evaporation
of AdBlue.
·
Mixing with
Exhaust Gas.
·
Conversion of
AdBlue into Ammonia NH3 and CO2
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Tata Motors Commercial Vehicle Switchback Layout |
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Tata Motors Commercial Vehicles In-Line Layout |
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