Toward Low-Carbon Diesel Mobility: Experimental Evaluation of a Hydrogen–Diesel Dual-Fuel Passenger Car
低炭素ディーゼルモビリティに向けて：水素・ディーゼル二元燃料乗用車の実験的評価 (AI 翻訳)
Alfredas Rimkus, Saugirdas Pukalskas, Gabrielius Mejeras, Saulius Stravinskas, Donatas Kriaučiūnas
🤖 gxceed AI 要約
日本語
本研究は、乗用車用ディーゼルエンジンに水素を部分混焼させた場合の運転特性、エネルギー性能、排出ガスへの影響をシャシダイナモ試験で評価した。負荷に応じて水素質量割合を11〜19%に制御し、低・中負荷ではディーゼル消費量を20〜25%、CO2排出量を17〜21%削減できることを示した。一方、高負荷では異常燃焼を避けるため水素割合を下げる必要があり、NOx排出量が増加するなど、負荷に応じた水素供給制御の重要性を明らかにした。
English
This study experimentally evaluated a hydrogen-diesel dual-fuel passenger car engine on a chassis dynamometer. By controlling hydrogen mass fraction (11-19%) based on load, diesel consumption and CO2 emissions were reduced by 20-25% and 17-21% respectively at low and medium loads. However, at high loads, hydrogen addition increased NOx emissions and smoke, indicating the need for load-sensitive hydrogen dosing to avoid abnormal combustion.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本では水素社会実現に向けた取り組みが進むが、乗用車向け水素利用はFCVが中心で、既存ディーゼル車への水素混焼は商用車や産業用が主な検討対象。本研究成果は、既存ディーゼル車の低炭素化オプションとして水素混焼の可能性を示すもので、日本の運輸部門の脱炭素化政策や水素インフラ整備の議論に示唆を与える。
In the global GX context
Globally, hydrogen-diesel dual-fuel technology is gaining attention as a low-carbon solution for existing diesel fleets, especially in heavy-duty transport. This study provides empirical data on passenger car applications, highlighting load-dependent benefits and limitations. The findings contribute to the broader discussion on hydrogen's role in decarbonizing the transport sector, complementing battery electric and fuel cell vehicles.
👥 読者別の含意
🔬研究者:Provides experimental data on hydrogen-diesel dual-fuel combustion characteristics and emissions, useful for engine calibration and control strategy development.
🏢実務担当者:Offers insights into the feasibility and operational constraints of retrofitting existing diesel vehicles with hydrogen, relevant for fleet operators and vehicle manufacturers.
🏛政策担当者:Informs policy on hydrogen infrastructure and incentives for low-carbon mobility, particularly for existing diesel vehicles.
📄 Abstract（原文）
This study investigated the effects of partial substitution of diesel fuel with hydrogen in dual-fuel operation on the engine operating characteristics, energy performance, and exhaust emissions of a compression-ignition passenger car engine. Hydrogen was supplied into the intake manifold, and the vehicle was tested on a chassis dynamometer at a constant vehicle speed under varying load conditions. To avoid the onset of abnormal combustion, the maximum stable H2 mass fraction under diesel–hydrogen dual-fuel operation had to be reduced from 19% to 11% as engine load increased over the brake mean effective pressure (BMEP) range of 0.38–0.88 MPa, while the corresponding H2 volume fraction in the intake air increased from 4.2% to 6.3%. Hydrogen addition reduced diesel fuel consumption and CO2 emissions, although its effect depended strongly on engine load. At a 10% H2 mass fraction, diesel fuel consumption decreased by 20–25%, and CO2 emissions decreased by 17–21%. At low load, hydrogen addition improved brake thermal efficiency (BTE) and reduced NOx emissions. At higher loads, reaching the hydrogen flammability limit reduced the excess-air ratio, deteriorated diesel combustion quality, and increased NOx emissions and the exhaust smoke absorption coefficient. Higher H2 concentrations reduced combined NOx + HC emissions at low load but increased them at medium and high loads. Overall, hydrogen enrichment was most effective at low and medium loads, below the abnormal combustion onset limit, indicating that load-sensitive hydrogen dosing is required for efficient and environmentally favourable diesel–hydrogen dual-fuel operation.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/app16157685first seen 2026-08-05 04:53:13
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。