Active Pre-Chamber as a Technology for Addressing Fuel Slip and its Associated Challenges to Lambda Estimation in Hydrogen ICEs

2023-32-0041

09/29/2023

Event
2023 JSAE/SAE Powertrains, Energy and Lubricants International Meeting
Authors Abstract
Content
Heavy duty hydrogen (H2) internal combustion engines (ICEs), typically conversions from base diesel engines, can experience significant deterioration of combustion efficiency with enleanment despite relative engine stability due in part to non-optimized combustion chamber geometry for spark ignited (SI) combustion. This causes un-combusted H2 to “slip” into the exhaust largely undetected since it is not a typically measured exhaust species. In this study, several implications of H2 slip in H2 ICEs are explored. The sensitivity of air fuel ratio (AFR) measurement to H2 slip is discussed. The challenge this poses for closed-loop transient controls and the impact on nitrogen oxides (NOx) emissions are also shown. Finally, test results from an H2 ICE using an active pre-chamber highlight the improvement in combustion efficiency and transient stability relative to a baseline SI engine.
Meta TagsDetails
DOI
https://doi.org/10.4271/2023-32-0041
Pages
8
Citation
Peters, N., and Bunce, M., "Active Pre-Chamber as a Technology for Addressing Fuel Slip and its Associated Challenges to Lambda Estimation in Hydrogen ICEs," SAE Technical Paper 2023-32-0041, 2023, https://doi.org/10.4271/2023-32-0041.
Additional Details
Publisher
Published
Sep 29, 2023
Product Code
2023-32-0041
Content Type
Technical Paper
Language
English