Developing a transnational network of hydrogen refuelling stations for trucks

“Twin-nozzle to bridge the time until High Flow nozzles will be in place”

11 April 2024
During the eighth HyTruck Breakfast Briefing on 3rd April 2024, Vincent Mattelaer from Toyota Motor Europe introduced the topics of the upcoming heavy duty vehicle fueling protocols and the CEP approval process for HRS.
Technical details


Initially, Vincent Mattelaer presented the standards and guidelines affecting the fueling protocol of heavy duty vehicles. To fulfill the AFIR requirements, the standard ISO 17268 plays a key role when determining the types and technical properties of refueling nozzles. The standard has been updated multiple times in the past and new nozzle types and performance requirements have been added. The latest standard allows to increase the maximum flow rate from normal flow of currently 60 g/s to mid flow with a rate of 90 g/s. This shortens fueling time from 28 to 19 minutes. The development of the second edition of standards allowing for high flow rates of up to 300 g/s is still under progress and is expected to be in place not before the end of 2026.

As fueling times with mid flow rates are regarded as insufficient by hauliers and high flow nozzles are not yet technically ready for commercial use, it was found by Toyota, that twin nozzle solutions are the most promising alternative for the time being. With the twin nozzle solution, one dispenser can be used for refueling two light duty vehicles or one heavy duty vehicle. Fueling times could thus be reduced to 9 minutes for mid flow nozzles.

In the second part, CEP HRS Operation Acceptance Test according to EN17127 was introduced. The Acceptance Test consist of five steps: Declaration where HRS supplier declares the SAE conformity of the system, Testing which includes FAT and operational testing, Reporting which requires actions from HRS-supplier and OEMs, Control step where CEP evaluates acceptance report and finally the Approval where explicit approval from the OEMs are received. After the successful completion of approval process, the HRS will be added to map ( and can start the commercial operation.

Presentation for download: