Comparison between BSIV (BS4) and BSVI (BS6) school bus
Increasing contamination or pollution has become a significant setback today, where emission from vehicles has become a major issue. The issue has not only created a chaotic circumstance but has arrived at catastrophic extents.
In 2000 BSES (Bharat Stage Emission Standards) first emission guidelines were executed to control the harmful gasses emitted or radiated from the exhaust of the vehicle. Since the emission standards have made considerable progress through BS4 to forthcoming most recent BS6 standards which are even cleaner.
BS4 standards were enforced in 2017. However, considering the increasing need to make emission norms stricter, the government has decided to imply BS6 norms directly, skipping BS5 in the process with the result that the Government of India was compelled to embrace stringent measures between alia by presenting and declaring the obligatory conditions that each and every newly manufactured vehicle should fulfill and follow Bharat Stage (BS) 6 Norms in April 2020.
BSVI emission standard reduces harmful Hydrocarbon, Nitrogen Oxides and, Particulate Matter significantly from BSIV thus improving AQI and paving the way for a GREENER FUTURE and ensuring long-term environmental sustainability. One of the consequences of this strategy was the compulsory prerequisite of acquiring a Certification affirming that every single vehicle on the road was free of pollution liberated from contamination-producing substances and gases.
| Technology | Emission Impact | Significance |
|---|---|---|
| Diesel Oxidation Catalyst (DOC) | High reduction of HC/CO emissions, small to moderate PM conversion. The oxidation of NO to NO2 enhances the performance of SCR/DPF systems. | Widely used on Euro 2/3 cars and on some US1994 and later heavy and medium-duty diesel engines. In modern engines, used as an auxiliary catalyst in SCR/DPF after treatment systems (NO2 generation, ammonia slip control). |
| Partical Oxidation Catalyst | Up to ~50% PM emission reduction | Limited commercial application in selected (EGR-equipped) ERO IV heavy-duty truck engines, as well as in some light-duty and nonroad engines. |
| Diesel particulate filters (DPF) | 90%+ PM emission reduction | Mainstream technology used on all Euro 5 and US Tier 2 and later light-duty diesels; in all US2007 and Euro VI and later heavy-duty engines; in all Stage V non-road engines; in retrofit programs worldwide. |
| Urea-SCR catalysts | 90%+ NOx reduction | Mainstream technology used in US2010, Euro V and later heavy-duty engines; in US Tier 2 and Euro 5/6 and later light-duty diesel vehicles; in nonroad, marine, and stationary engines |
| NOx adsorbed catalysts | Up to ~70-90% NOx reduction, depends on the drive cycle | Used as a stand-alone NOx reduction catalyst in some US Tier 2 and Euro 5/6 light-duty vehicles. Used as a cold-start NOx reduction catalyst on some Euro 6 Vehicles with SCR |
| Lean NOx catalyst (HC-SCR) | NOx reduction potential of ~10-20% in passive systems, up to 50% in active systems | Limited OEM and retrofit commercial application, mostly in 2000s |
COMPARISION OF THE PERMISSIBLE EMISSION LEVELS OF BS6 VEHICLES COMPARED TO BS4 VEHICLES
| BS Norms | CO (Petrol) g/km | CO (Diesel) g/km | HC (Petrol) g/km | HC (Diesel) g/km | NOx (Petrol) g/km | NOx (Diesel) g/km | PM (Petrol) | PM (Diesel) | Sulpur content |
|---|---|---|---|---|---|---|---|---|---|
| BS IV | 1 | 0.5 | 0.1 | 0.25 | 0.08 | 0.3 | less than 250mg | 50 ppm | |
| BS VI | 1 | 0.5 | 0.1 | 0.06 | 0.06 | 0.17 | less than 4.5mg/km | less than 4.5mg/km | 10 ppm |
Good air quality is principal to our prosperity or well-being. The presence of pollutants in this air can unfavorably affect individuals’ wellbeing. Vehicles, trucks, and transports controlled by petroleum products are significant contributors to air pollution. Truth be told, transportation releases the greater part of nitrogen oxides in our air, and is a significant source of global warming. Individuals with prior respiratory and heart conditions, diabetes, the young, and old aged individuals are especially at greater risk.
Studies have connected toxins, pollutants from vehicle fumes to unfavorable effects on essentially every organ system in the body. The rise in the contaminated air has become a significant mishap today, where emissions from vehicles have become a major issue. Clean vehicle and fuel technology can essentially lessen emissions from our vehicles and trucks, and help change transportation.
BS6 enginesare completely compliant with the BS4 vehicle’s, indeed it will make your vehicle more eco-friendly. The BS6 engine does that by having less content of sulfur. This in turn implies having a much cleaner fuel as it diminishesthe emission of harmful pollutants like carbon monoxide, nitrogen oxides ,and hydrocarbons,and Particulate Matter significantly from BSIV thus improving AQI and paving the way for a GREENER FUTURE and ensuring long term environmental sustainability.
If you are looking at it from the environment friendly point of view, then BS6 is absolutely the best option.
COMPARISION OF THE BS6 VEHICLES TO BS4 VEHICLES
| Sl No | Description | BS6 | BS4 |
|---|---|---|---|
| 1 | Technology used | Selective catalytic reduction (SCR), Lean Nitrous Traps (LNT). | selective catalytic reduction (SCR) EGR (Exhaust Gas Recirculation) |
| 2 | Sensors | Map, oxygen, throttle position, engine oil temperature sensors, IAT, NOx | Oxygen sensor, Exhaust Gas Temperature Sensors. Thermal Anemometer Air Flow Sensors. Soot (PM) Sensors. |
| 3 | Filters | Diesel particulate filter (DPF) | |
| 4 | Sulphur | 50 ppm | 10ppm |
| 5 | Fuel Efficiency | 68% better fuel efficiency | Lesser fuel efficiency |
| 6 | Software present | Real Driving Emission (RDE), on board diagnostics | |
| 7 | Pollution | Decreased pollution | Increase pollution |
