The Dawn of a New Emissions Era

The European Union has officially ushered in a new era of vehicle emissions regulation with the publication of Regulation (EU) 2024/1257 on May 8, 2024. Euro 7 represents the most ambitious and comprehensive emissions standard ever developed, covering not just tailpipe pollutants but also brake dust, tire wear, and battery durability. For manufacturers and suppliers like HENTEKCAT, this regulation fundamentally reshapes the engineering landscape for exhaust aftertreatment systems.

What Euro 7 Requires

Euro 7 introduces several paradigm shifts in emissions regulation:

Lower Emission Limits: NOx limits are reduced by approximately 35% compared to Euro 6 for passenger cars, with heavy-duty vehicles facing even more aggressive reductions. Particulate matter (PM) limits have been halved for gasoline direct injection vehicles, and a new particulate number (PN) limit of 6×10¹¹ #/km applies to all vehicles, regardless of fuel type.

Extended Durability Requirements: Emission control systems must maintain performance for longer periods. Passenger cars are now required to meet emissions standards for up to 200,000 km or 10 years, while heavy-duty vehicles face 700,000 km or 12-year durability requirements.

Real-Driving Emissions (RDE): Euro 7 expands RDE testing to cover a wider range of driving conditions, including cold starts (down to -10°C), high altitudes (up to 2,300 meters), and urban congestion scenarios with extended idle periods.

Brake and Tire Emissions: For the first time, Euro 7 regulates non-exhaust particulate emissions from brake wear and tire abrasion – a recognition that these sources contribute significantly to urban PM levels.

Battery Durability (for EVs): The regulation also sets minimum durability requirements for electric vehicle batteries, requiring 80% capacity retention after 5 years or 100,000 km.

Technical Implications for Aftertreatment Systems

To meet Euro 7’s stringent requirements, aftertreatment systems must evolve significantly:

For Gasoline Vehicles:

• Dual-layer TWC architectures with enhanced oxygen storage capacity (OSC) are becoming standard.
• Electrically heated catalysts (eHC) are now essential for hybrid vehicles to maintain catalyst temperature during extended electric-only operation.
• Gasoline particulate filters (GPF) must achieve >99% PN filtration efficiency across all driving conditions.

For Diesel Vehicles:

• Dual SCR systems (small close-coupled + large underfloor) are required to achieve 90-95% NOx conversion during cold starts.
• Thermal management strategies (insulation, active heating) are essential to maintain SCR temperature during low-load operation.
• Ammonia slip must be controlled below 5 ppm to prevent secondary pollution.

How HENTEKCAT Is Preparing

At HENTEKCAT, we have been tracking Euro 7 development since its initial proposal in 2021. Our R&D team has developed:

• High-OSC washcoat formulations (800+ µmol O₂/g) that maintain conversion efficiency during the extended RDE testing windows.
• Advanced cGPF designs with bimodal pore size distribution for ultra-low backpressure and >99% PN filtration.
• Predictive thermal management systems that use GPS and navigation data to pre-heat catalysts before engine restart in hybrids.
• AI-powered remote monitoring platforms that continuously track catalyst aging and predict remaining useful life, ensuring vehicles remain compliant throughout their extended durability periods.

What This Means for Our Customers

For OEMs, the message is clear: Euro 7 is not a small increment but a fundamental redesign requirement. Retrofitting existing architectures will not suffice – new vehicles must be engineered from the ground up with aftertreatment as a primary consideration. HENTEKCAT is ready to support this transition with proven solutions validated to Euro 7 requirements.