How Greenhouse Gas Emissions Evolve When Changing from an ICE to a BEV Fleet
内燃機関車からEVへの移行における温室効果ガス排出量の変化 (AI 翻訳)
Benjamin Reuter
🤖 gxceed AI 要約
日本語
本研究は、ドイツの乗用車フリートを対象に、2035年の内燃機関車新車登録禁止を含むシナリオ下での温室効果ガス排出量の経時的変化をシミュレート。新車登録変更から実際の排出削減には10～20年のタイムラグがあり、2030年時点での削減はわずか3.7%にとどまる。累積排出量は2060年までに45%削減されるが、早期の対策とゼロエミッション燃料の併用が重要であることを示す。
English
This study simulates the temporal dynamics of greenhouse gas emissions during the transition from internal combustion engine to battery electric vehicles in Germany's passenger car fleet. It finds a 10-20 year time lag between changes in new vehicle registrations and effective emission reductions. Even with a complete ICE ban by 2035, annual emissions decline by only 3.7% by 2030, while cumulative emissions until 2060 decrease by 45%. The results highlight the need for early action and supplementary zero-emission fuels.
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
本論文はドイツを対象とするが、日本のEV政策やカーボンニュートラル目標の達成にも示唆を与える。日本の自動車フリートの更新には同様のタイムラグが存在するため、2035年ガソリン車禁止などの政策目標は、実際の排出削減効果が遅れて現れることを考慮すべき。
In the global GX context
This paper provides critical empirical evidence on the time lag in fleet turnover, which is often overlooked in policy discussions globally. For regions aiming for 2035-2040 ICE phase-outs, the modeled 10-20 year delay underscores the urgency of immediate decarbonization measures and the complementary role of zero-emission fuels in the transition.
👥 読者別の含意
🔬研究者:The time-resolved model and quantification of cumulative emissions provide a rigorous framework for analyzing fleet transition dynamics.
🏢実務担当者:Automotive and energy companies can use the findings to calibrate investment timelines for EV production and charging infrastructure.
🏛政策担当者:The paper demonstrates that early policy action is essential due to the inertia of vehicle fleet turnover, and that alternative fuels can compensate for slower EV uptake.
📄 Abstract（原文）
There is an important debate about the appropriate policy measures for reducing greenhouse gas (GHG) emissions in the transport sector. Strong expansion of battery electric vehicles (BEVs) following a ban on the registration of new vehicles with internal combustion engines (ICEs) by 2035 is a prominent but controversial proposal. To evaluate achievable GHG emission reductions, it is essential to understand the temporal dynamics of such a fleet transition. This study provides a time-resolved, policy-oriented quantification of annual and cumulative lifecycle GHG emissions during this process. Therefore, it uses an annual simulation model to assess GHG emissions from vehicle production and use during the transition of Germany’s passenger car fleet between 2019 and 2060. The analysis compares an ICE registration ban by 2035 with alternative scenarios and evaluates the effects of electricity decarbonization, greener BEV production, and the supply of additional Zero Emission Fuels (ZEFs). This study reveals a substantial time lag of 10–20 years between changes in new vehicle registrations and effective emission reductions. Even with a complete ICE ban by 2035, annual GHG emissions decline by only 3.7% by 2030 relative to 2025, while cumulative emissions over this period fall by just 1.6%. Larger reductions occur later, reaching 39% in 2040, 77% in 2050, and 82% in 2060 compared with 2025; cumulative emissions until 2060 decrease by 45%. Without an ICE ban and with a 75% BEV share from 2035 onward, cumulative reductions fall to 34%. Introducing additional ZEFs equivalent to 10% of 2030 fuel demand increases this value to 41%, compensating for much of the lower BEV uptake.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.3390/wevj17050273first seen 2026-05-22 04:57:28 · last seen 2026-05-27 05:08:43
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