Optimizing Emission Control System for a H2-ICE Powertrain Concept for a Light-Commercial Vehicle to Meet Stringent Euro 7 Standards

Authors

E. Laigle, C. Chaillou, P. Gaillard, Aramco Europe, Rueil-Malmaison; D. Baralon, PHINIA, Blois; J. Hinault, A. Leclerc, CERTAM, Saint-Étienne-du-Rouvray; A. Chiffey, F. Moreau, Johnson Matthey, Royston; J. Goja, A. Wille, NGK, Kronberg

Year

2025

Print Info

Production/Publication ÖVK

Summary

The hydrogen-fuelled Internal Combustion Engine (H₂-ICE) offers a promising solution for reducing carbon emissions in the transportation sector. While H₂-ICEs produce minimal CO₂ emissions, they do emit pollutants like Nitrogen Oxides (NO_x) and Particulate Numbers (PN). 

To meet the stringent NO_x and PN limits, like Euro 7 emission standards starting from 2027 and upcoming China CN7 as well as upcoming India BS7, an efficient emission control system would be needed and is crucial. 

In this study, several emission control system configurations were tested with a 2.2L hydrogen direct injection engine. These configurations included various catalysts such as Hydrogen Oxidation Catalysts (HOC), Selective Catalytic Reduction (SCR) systems with urea (AdBlue) injection, Ammonia Slip Catalysts (ASC), and particulate filters. The emission conversion efficiencies are investigated in different conditions including cold start, various driving cycles, engine load and combustion calibration tests to modulate the engine out NO_x emissions. 
Further evaluations had been carried out, investigating the opportunity to use dedicated combustion modes and thermal management calibration during the cold start phase with the trade-off between NO_x production and H₂ consumption being discussed. 

Our findings provide a proof of concept and valuable insights into the performance and feasibility of a 2.2L hydrogen direct injection engine with an integrated advanced emission control to ensure H2-ICE powertrain concepts can meet future stringent Euro 7 emission standards and upcoming global standards.

ISBN

978-3-9504969-4-9

DOI

https://doi.org/10.62626/6qui-hyt3 Copy link

Order Members Login