rate of return over costとは 意味・読み方・使い方

To achieve a reduction in cost and an improvement in reliability and also to achieve a low fuel consumption and a reduction in exhaust gas by injection rate control suitable for an engine load by control over opening/closing of a solenoid valve, by reviewing the shape of a cam driving a fuel injection device and also simplifying a system in such a manner that solenoid valves disposed in a return pipe are reduced to one solenoid valve.例文帳に追加

燃料噴射装置を駆動するカム形状を見直すとともに、戻り管に設けられる電磁弁を１個としてシステムを簡単化し、コスト低減及び信頼性の向上を図るとともに、前記電磁弁の開閉制御によってエンジン負荷に適した噴射率制御により低燃費率、低排気ガス化を達成すること。 - 特許庁