PROBLEM TO BE SOLVED: To provide a fuel consumption evaluating device capable of calculating fuel consumption with high accuracy despite its simple configuration.SOLUTION: This fuel consumption evaluating system includes an accelerator opening detecting part 55 for detecting an accelerator opening, a speed detecting part 56 for detecting the engine speed of an engine driven travelling vehicle as a measured speed, a fuel injection amount computing means for calculating a fuel injection amount per predetermined unit from the accelerator opening and the measured speed in accordance with a correlation between an engine speed drop from a reference speed as the engine speed during no load of an engine and a change of the fuel injection amount, created with respect to each accelerator opening, and a fuel consumption evaluating part 54 for evaluating fuel consumption in accordance with the fuel injection amount calculated by the fuel injection amount computing means.COPYRIGHT: (C)2011,JPO&INPIT【課題】簡単な構成にもかかわらず燃料消費量を高精度で算定することができる燃料消費量評価装置を提供することである。【解決手段】燃料消費量評価システムは、アクセル開度を検知するアクセル開度検知部55と、エンジン駆動走行車両のエンジン回転数を測定回転数として検知する回転数検知部56と、アクセル開度別に作成された、エンジン無負荷時のエンジン回転数である基準回転数からのエンジン回転数ドロップ量と燃料噴射量の変化との相関関係に基づいて、アクセル開度と測定回転数とから所定単位あたりの燃料噴射量を算定する燃料噴射量演算手段と、この燃料噴射量演算手段によって算定された燃料噴射量に基づいて燃費評価を行う燃費評価部54を備えている。【選択図】図4
