An Assessment of Real-World Driving Emissions and Fuel Consumption of a Diesel Bus with Using a Portable Emissions and Fuel Consumption Measurement System: İstanbul Bus Rapid Transit-Metrobus

Pollutants from combustion engine powered public transportation are showing great importance in terms of air quality, human being health and also the global warming. The amount of fuel consumed during transportation is another factor that should be taken in to account because of economic aspects. In this context, a part of one of the world’s biggest public transportation axle – Istanbul Metrobus public transportation system – which is using a dedicated line is analyzed via using on board emission measurement system and onboard fuel consumption metering devices. The relevant controller area network data was collected during cruises. The fuel consumption and emissions results are analyzed regarding to cruise statistical data, driving modes, road gradient and vehicle specific power data and per passenger statistic. A strong correlation between vehicle specific power and fuel consumption and emissions is shown. The effect of acceleration and velocity are analyzed. Fuel consumption and emission data obtained regarding to the topography indicated that, topography should be used with vehicle properties in public transportation planning. Also it was evaluated that the portable emission measurement systems and mobile fuel consumption measurements can be a part of engine calibration development for environmentally friendly and economic public transportation.

Portatif Emisyon ve Yakıt Tüketimi Ölçüm Sistemi Kullanılarak Bir Dizel Otobüsün Gerçek Dünya Sürüş Emisyonları ve Yakıt Tüketiminin Değerlendirilmesi: İstanbul Otobüs Hızlı Ulaşımı – Metrobus

İçten yanmalı motorlarla tahrik edilen toplu taşıma kaynaklı emisyonlar hava kirliliği, insan sağlığı ve küresel ısınma açısından oldukça önem arz etmektedir. Toplu taşıma esnasında tüketilen yakıt miktarı özellikle ekonomiklik anlamında dikkate alınması gereken diğer bir faktördür. Bu doğrultuda dünya toplu taşıma sisteminin önemli taşıma akslarından biri olan ve kendine ayrılmış özel bir hat kullanan İstanbul Metrobüs Taşıma Sisteminin bir kısmı araç üstü portatif emisyon ve yakıt tüketimi ölçüm cihazları kullanılarak analiz edilmiş ve değerlendirilmiştir. Tüm çalışma boyunca yolcu otobüslerinin elektronik kontrol ağı üzerindeki gerekli veriler de paralel olarak toplanmıştır. Sonrasında yakıt tüketimi ve emisyon verileri, seyirlerin istatistiki verileri, sürüş modları, yol eğimi ve araç özgül gücü anlamında değerlendirilmiştir. Çalışmada yapılan analizlerle taşıt özgül gücü ile yakıt tüketimi ve emisyonlar arasında güçlü bir korelasyon olduğu gösterilmiştir. İvmenin ve taşıt hızının yakıt tüketimi ve emisyonlar üzerine etkileri irdelenmiştir. Topoğrafyaya bağlı elde edilen yakıt tüketimi ve emisyon verileri, toplu taşıma planlamasında topoğrafya verilerinin araç özellikleri ile birlikte kullanımının gerekliliğini ortaya koymuştur. Yapılan analiziler neticesinde araç üstü portatif emisyon ölçüm sistemleri ve mobil yakıt tüketimi ölçüm cihazlarının daha çevreci ve ekonomik toplu taşıma için motor kalibrasyon proseslerinin bir parçası olabileceği değerlendirilmiştir.

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