Achieving Ultra-Low NO x and Meeting Full Useful Life Requirement for CARB 2027 NO x and GHG 2027 Phase 2 CO 2 Regulation w/Opposed Piston 2-Stroke Engine and a Conventional ATS

2025-01-8391

04/01/2025

Features
Event
WCX SAE World Congress Experience
Authors Abstract
Content
Internal combustion engines are expected to continue to play an important on-going role in the future of transportation, particularly in long haul transit and off-road applications. Substantially reducing criteria emissions of heavy-duty (HD) commercial vehicle engines while also reducing fuel consumption is the quickest way to achieve more sustainable transportation. The opposed-piston (OP) engine developed by Achates Power has demonstrated the ability to meet the most stringent ultralow NOx emissions requirements using only a conventional, underfloor aftertreatment system, offering reduced cost, complexity and compliance risk compared to other diesel engines. This paper is focused on the measurement results of Achates Power heavy-duty engine achieving CARB proposed ultralow NOx emission for 2027 and 2031+ full useful life requirements while also meeting the EPA Greenhouse Gas (GHG) Phase 2 limits with a conventional aftertreatment system (ATS), which was aged to 435k, 600k and 800k equivalent miles. The paper will describe EPA cycle results at each aging step and highlight the challenge of simultaneously meeting both criteria and CO2 emissions.
Meta TagsDetails
DOI
https://doi.org/10.4271/2025-01-8391
Pages
34
Citation
Kale, V., and Bako, Z., "Achieving Ultra-Low NO x and Meeting Full Useful Life Requirement for CARB 2027 NO x and GHG 2027 Phase 2 CO 2 Regulation w/Opposed Piston 2-Stroke Engine and a Conventional ATS," SAE Technical Paper 2025-01-8391, 2025, https://doi.org/10.4271/2025-01-8391.
Additional Details
Publisher
Published
Apr 01
Product Code
2025-01-8391
Content Type
Technical Paper
Language
English