IIT Delhi retrofit could extend life of older diesel bus and truck fleets
A ₹4,000–₹5,000 IIT Delhi-developed retrofit device is being prepared for commercial deployment under the proposed AIS-228 standard, offering fleet operators a lower-cost route to reduce emissions from BS-III and BS-IV vehicles toward BS-VI levels.
What happened
India plans commercial deployment of an IIT Delhi-developed ₹4,000-₹5,000 retrofit device for older diesel buses and trucks, reducing emissions toward BS-VI
Key facts
- ₹4,000-₹5,000 device price
- up to 90% particulate matter reduction
- 60% nitrogen oxide reduction
- BS-III and BS-IV legacy vehicles
- AIS-228 standard
- 2 buses per 1,000 people in India
- global benchmark of 8 buses per 1,000 people
- 5 lakh annual road accidents
- 1.80 lakh annual fatalities
- October 2027 Bharat NCAP rollout
Why this matters
Commercial-vehicle OEMs, fleet-service networks and emissions-control suppliers should assess licensing, distribution or deployment partnerships before the standard formalizes demand.