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CMF drive

We upcycle used diesel city buses for a second life as clean, efficient, silent and cost-effective bus - driving on 100% renewable fuel

April 2021
July 2024

CMF drive

We upcycle used diesel city buses for a second life as clean, efficient, silent and cost-effective bus - driving on 100% renewable fuel

  • World Alliance Member
  • Featured Solution
  • Labelled Solution
Label Date July 19, 2024
From Germany
Maturity stage TRL 9 / CRI 2 - Commercial Trial Small Scale
Looking for funding on RUNWAY View financial profile

How does it work? Municipalities give their old buses to us instead of scrapping it or selling it abroad. We remove all diesel components like tank, engine etc. and install the patented CMF drive. It consists of an electric drivetrain with an on-board charger and enables 3-fold energy savings: Through recovery of braking energy, usage of engine waste heat and constant optimal load at the on-board charger. Through upcycling we avoid unnecessary material production. Our customer gets back a bus, which is ready for another 12 to 20 years of clean driving. Fuel supply is easy: The CMF drive runs on LNG (liquid natural gas - 30 % CO2 reduction), Bio-LNG (biologically produced natural gas from existing biogas plants - net-zero CO2 emissions right away) or SNG (synthetic natural gas made from hydrogen enables net-zero CO2 emissions). Suitable fuel stations already exist all over Europe. As soon as green hydrogen is available in sufficient amounts the CMF drive can easily be adapted to it.

The Environmental Benefits

  • 30 % more energy efficient than conventional buses thanks to the patented CMF drive
  • 5 minutes refueling 500 kilometers driving thanks to the on-board charger
  • 50 % less engine noise
  • Net zero CO₂ is the use phase emissions with Bio-LNG
  • 90 tons of CO2 emissions per bus avoided through upcycling of used buses instead of producing new ones
  • 95 % less air pollution

The Financial Benefits

  • €200,000 to €400,000 cheaper acquisition costs than battery electric or hydrogen buses
  • No charging infrastructure needed compared to EV or Hydrogen buses
  • €120,000 to €190,000 fuel cost savings over a lifetime of 12 years for one bus compared to battery electric, hydrogen, CNG or diesel bus

Target client profile

Activity Region

  • Headquarters
  • Activity

Company Profile

CM Fluids

Wir dekarbonisieren den städtischen Verkehr durch die Nachrüstung von Dieselbussen mit unserem innovativen CMF-Antrieb, der mit CMF-Biomethan betrieben wird.

Headquarters 85296 Rohrbach, Deutschland
Type Startup or self-employed
View company profile Solution website

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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator CM Fluids has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.