Introduction
India’s commercial transport sector is evolving rapidly—not just in technology, but also in environmental responsibility. With the introduction of BS6 (Bharat Stage 6) emission norms in April 2020, India took a massive leap forward in controlling air pollution from vehicles.
But what exactly are these norms? And what’s next beyond BS6? Let’s break it down.
What Are Emission Norms?
Emission norms are regulatory standards that limit the output of air pollutants from internal combustion engines. These norms apply to all vehicles and are crucial in reducing air pollution caused by vehicular emissions.
From BS4 to BS6: The Leap
BS4 (Bharat Stage IV): Enforced in 2017 across India.
BS6 (Bharat Stage VI): Skipped BS5 and implemented BS6 directly in 2020 for stronger environmental impact.
Key Differences:
NOx Emissions reduced by 68% in diesel vehicles.
Particulate Matter (PM) reduced by 80% in diesel engines.
Introduction of Diesel Particulate Filters (DPF), Selective Catalytic Reduction (SCR), and Onboard Diagnostic (OBD) systems.
Impact on Commercial Vehicle Industry
Higher cost due to advanced technology.
Improved fuel efficiency in newer engines.
Mandatory use of low-sulfur BS6-grade fuel.
Increase in engine lifespan and lower emissions.
Challenges in Implementation
High upfront costs for fleet owners.
Lack of awareness and training for BS6 maintenance.
Early models faced issues with DPF clogging due to low-speed urban driving.
The Future: BS7 or Electric?
While BS6 is currently the standard, discussions have already begun around BS7 norms focusing on real-world emissions and hybrid technology integration.
Alternatives:
Electric Trucks & EV Fleets
Hydrogen Fuel Cell Technology
CNG and LNG powered commercial vehicles