A Methodology for Monitoring On-Road CO2 Emissions Compliance in Passenger Vehicles Aristotle University of Thessaloniki

Format:

Book

Conference/Event

Author/Creator:

Zacharof, Nikiforos, author.

Contributor:

Dimaratos, Athanasios

Dornoff, Jan

Doulgeris, Stylianos

Fontaras, Georgios

Kolokotronis, Dimitrios

Mock, Peter

Myrsinias, Ioannis

Samaras, Zissis

Toumasatos, Zisimos

Conference Name:

CO2 Reduction for Transportation Systems Conference (2020-07-07 : Turin, Italy)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2020

Summary:

The European Union road transport CO2 emissions regulation foresees mandatory targets for passenger vehicles. However, several studies have shown that there is a divergence between official and real-world values that could range up to 40% compared to the NEDC reference value. The introduction of the Worldwide Harmonized Test Protocol (WLTP) limited this divergence, but it is uncertain whether it can adequately address the problem, particularly considering future evolutions of vehicle technology. In order to address this issue, the recent EU CO2-standards regulation introduces the monitoring of on-road fuel consumption and subsequently CO2 emissions by utilizing On-Board Fuel Consumption Meters (OBFCM). In the near future, all vehicles should provide instantaneous and lifetime-cumulative fuel consumption signals at the diagnostics portrait Currently, the fuel consumption signal is not always available. The current study investigates a monitoring approach that obtains and normalizes on-road vehicle operation data of existing vehicles and estimates on-road CO2 emissions through vehicle simulation. The first step is to reconstruct the engine fuel consumption map, based on laboratory vehicle measurements in order to use it as reference data. Subsequently, a methodology is developed to set up a vehicle simulation model aiming at using the signals retrieved through the OBD port, under real-world operation, and to emulate data availability under a monitoring scheme. Subsequently, the methodology is validated with reference data from both measurements and simulations. In the current study, three vehicles were tested over both cold and hot conditions and it was found that under real-world conditions the divergence in the overall calculated CO2 emissions was below ±5% between simulated and measured values

Notes:

Vendor supplied data

Publisher Number:

2020-37-0034

Access Restriction:

Restricted for use by site license