SciTransfer
AeroSolfd · Project

Retrofit Air Filtration Systems for Gasoline Vehicles, Brakes, and Urban Transit Hubs

transportPilotedTRL 8

Imagine adding a high-tech mask to an old car's exhaust or a vacuum cleaner to a subway station to catch invisible poison. This project creates plug-and-play filters for older gasoline cars and brakes that don't have them. It's like giving an old vehicle a modern lung to stop it from polluting the city air.

By the numbers
95%
PM2.5 reduction using Gasoline Particle Filter
80%
toxic secondary emissions reduction
60%
NOx exhaust emissions reduction
90%
brake particle reduction using passive BDPF
90%
particle reduction in closed environments
1,000
vehicles in tailpipe retrofit demo
130,000
commuters impacted in underground station demos
The business problem

What needed solving

Existing gasoline fleets and brake systems emit toxic particles that cause millions of premature deaths. Replacing entire fleets with electric vehicles takes too long, leaving a critical gap in urban air quality management.

The solution

What was built

Three retrofit systems: a Gasoline Particle Filter for tailpipes, a passive Brake Dust Particle Filter (BDPF), and stationary air purifiers for metro stations and bus depots.

Audience

Who needs this

Municipal transit authoritiesCommercial fleet managersCity infrastructure developersAutomotive retrofit workshops
Business applications

Who can put this to work

Public Transport
enterprise
Target: Municipal Bus Operators

If you are a municipal bus operator dealing with brake wear emissions — this project developed a passive Brake Dust Particle Filter (BDPF) that removes 90% of brake particles. This allows you to clean up your fleet without replacing every vehicle immediately.

Urban Infrastructure
enterprise
Target: Metro and Subway Authorities

If you are a metro authority dealing with poor air quality in underground stations — this project developed enhanced stationary air purifiers that remove 90% of particles. This improves the health of over 130,000 commuters in tested sites.

Automotive Aftermarket
mid-size
Target: Fleet Maintenance Providers

If you are a fleet provider dealing with older gasoline engines (Euro 6c and earlier) — this project developed a Gasoline Particle Filter that removes 95% of PM2.5 and 80% of toxic secondary emissions. This extends the usable life of existing fleets while meeting stricter air standards.

Frequently asked

Quick answers

What is the cost or price of these retrofit kits?

Based on available project data, specific pricing and cost structures for the filtration devices are not provided.

Can these solutions be scaled to industrial fleets?

Yes, the project is testing at scale with 1,000 vehicles across two climate zones and over 35,000 km of lab testing on dynamometers.

How is the IP or licensing handled for these filters?

Based on available project data, the specific licensing terms are not mentioned, though the project is coordinated by MANN+HUMMEL GMBH.

Which regulations drive the need for this technology?

The project targets the gap in Euro 6c and earlier gasoline fleets and prepares for the first brake and tire emission regulations introduced with EURO 7.

What is the timeline for market availability?

The project aims to bring these solutions to TRL 8 and introduce them to the market by 2025.

Consortium

Who built it

The consortium is heavily industry-weighted with 8 industrial partners (42% ratio) and 6 research entities, indicating a strong push toward commercialization. Led by MANN+HUMMEL, the group spans 9 countries and includes 1 SME, combining large-scale manufacturing capability with academic validation and real-world testing sites in cities like Sofia, Lisbon, and Valladolid.

How to reach the team

Contact MANN+HUMMEL GMBH regarding retrofit filtration licensing

Next steps

Talk to the team behind this work.

Contact us to find a partner for Euro 7 compliance retrofitting

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