A Comparative Analysis of Passenger Car Fuel Economy between Laboratory and Real Driving Testing
乗用車の実験室と実走行試験における燃費の比較分析 (AI 翻訳)
A. Singh, Revanth Kumar Bathina, S. Tijare
🤖 gxceed AI 要約
日本語
インドの乗用車を対象に、実験室試験と実走行試験(RDE)での燃費を比較。ガソリン、ディーゼル、CNG+ガソリンのバイフューエル車を対象とし、実走行条件（特に外気温と運転パターン）が燃費に与える影響を明らかにした。CAFE規制に基づく炭素収支法を修正して燃費を算出し、実走行と実験室の差異を定量化した。
English
This study compares fuel economy (CO2 emissions) of passenger cars in India between laboratory tests and real driving emissions (RDE) tests for gasoline, diesel, and bi-fuel (CNG+gasoline) vehicles. Using a modified carbon balance method aligned with CAFE regulation, it quantifies the impact of real-world conditions, especially ambient temperature and driving behavior, on fuel efficiency. Results show significant deviation from lab values, highlighting the need for real-world testing in fuel economy regulation.
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
日本でもWLTCと実走行の乖離が課題となっているが、本論文はインドのBS VIおよびCAFE規制下での実証データを提供。日本の排出ガス・燃費規制の実効性検証や、RDE導入時の参考になる。
In the global GX context
This paper provides empirical evidence from India on the discrepancy between laboratory and real-world fuel economy, relevant to global debates on real-world emissions testing. It supports the case for incorporating real driving conditions into fuel economy standards, similar to the EU's RDE regulation and Japan's WLTC cycle adjustments.
👥 読者別の含意
🔬研究者:Provides a methodological framework for comparing lab and real-world fuel economy across multiple fuel types, applicable to other regions with similar testing protocols.
🏛政策担当者:Highlights the gap between certified and real-world fuel economy, informing regulatory design for CAFE and RDE standards, particularly in developing economies.
📄 Abstract（原文）
In India, fuel economy is one of the most critical factors influencing a customer's decision to own a passenger car. Beyond consumer preference, fuel consumption also plays a significant role in the nation's energy security. In line with this, the government promotes fuel-efficient vehicles and technologies through various regulations, policies, and mandates. Vehicle manufacturers, in response, focus on designing vehicles that align with both customer expectations and regulatory requirements. Fuel economy certification is typically based on standardized laboratory tests that simulate controlled environmental conditions, driving cycle (MIDC), vehicle load, and operation of electrical and electronic systems. However, actual on-road driving conditions by end user vary significantly due to factors such as traffic conditions, ambient temperature, air conditioning use, driving behavior and variable loading of the vehicle. With implementation of Bharat Stage VI, Real Driving Emission (RDE) became mandatory from April 2023 to meet the requirements of conformity factors (CF) for NOX and PN emission. RDE regulation scope doesn’t include measurement or compliance for fuel economy during real driving condition.For the purpose of this study, laboratory and real driving emissions (RDE) testing were carried out in accordance with AIS 137 Part 3. For systematic comparison, fuel economy was calculated after modifying Carbon Balance equation in line to CAFÉ regulation S.O. 1072 (E) Dated 23rd April 2015. This study presents a comparative analysis of fuel economy results obtained from the testing different vehicles operating on different fuels like Gasoline, Diesel and Bi-fuel (Compressed Natural Gas (CNG) + Gasoline). The paper concludes with finding of study as impact of real-world driving conditions, particularly of ambient temperature and real driving on fuel efficiency of passenger cars.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.4271/2026-26-0225first seen 2026-05-05 22:37:05
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