京都議定書に代表される温室効果ガス削減の動向により，運輸部門においては，排気ガス削減に結び付く規制として燃費基準が年々厳しく規定されてきている。それに伴い，各自動車メーカーの低燃費化への取り組みが急速に進んでおり，低燃費化を実現する技術開発のために，高精度の計測が可能な燃費計測システムが求められている。本稿では，高精度のダイレクト燃費計測の要望に応えうる弊社燃料流量計と，センサー・計測システムの視点における燃費計測に重要なポイントを紹介する。
Influenced by the trend toward reducing greenhouse gases represented by Kyoto Protocol, provisions on fuel consumption standard is stricter every year in transportation sector as regulations directly contributing to reduction of exhaust gases. As a result, efforts of automobile manufacturers to reduce fuel consumption are made more actively and quickly and therefore the technical development to realize low fuel consumption requires such a fuel consumption measurement system that enables highly accurate measurement. This article introduces our fuel flowmeter which satisfies the request for direct fuel consumption measurement with high accuracy and the important points to fuel consumption measurement at the viewpoints of sensor and measurement system.