Estimating Exhaust Gas Emissions and Greenhouse Gas Emissions for the Medium and Long-term to Enhance Exhaust Gas Emission Regulations

Shuichi Kanari･Hiroshi Hirai･Akiyoshi Ito･Tetsuya Suzuki (JARI)

EU has decided to introduce the latest emission regulation, Euro 7, and Euro7 may lead to stricter exhaust gas emission regulations in Japan. The authors have developed a method for estimating long-term CO2 emissions from the automobile sector, which could estimate of exhaust gas emissions. The authors tried to estimate exhaust gas emissions when exhaust gas emissions regulations are tightened and traffic flow measures are implemented.

A Framework for Determining Characteristic and Difficult Sub-Samples of Real Driving Data for Model-Based Engine Emissions Optimisation

Jack Prior (Loughborough University)･Luke Bates (HORIBA Mira)･Byron Mason (RMIT University)･James Knowles (Loughborough University)

Robust multi-objective approaches to engine emissions optimisation have recently emerged that use data-driven models trained on representative driving data. However, this data collection is resource expensive, due to the range of conditions that may be represented. Two possible approaches to reducing this real driving data include selecting characteristic sequences that broadly represent driving behaviour and difficult sequences that contribute strongly to an objective function such as emissions. In this work, an analysis approach is devised that quantifies these two qualities and assesses their trade-off within several one-hundred minute cycles of RDE-representative data.

Closed-coupled SCR System Design using MBD (Model Based Development)

Hiroshi Anoda (Isuzu Motors)･Kasumi Yoneyama･Kenji Fujii･Chihiro Ohtsuka (Isuzu Advanced Engineering Center)･Takurou Iwashita･Tomotaka Kariya･Tatsuyuki Mochizuki (Isuzu Motors)

In the future, emission regulations are scheduled to be tightened, and it is expected that the aftertreatment system including control will become more sophisticated and complex. Therefore, the problem is how to reduce the engine bench test. This paper reports a case in which the design of the closed-coupled SCR system was carried out by MBD including controllability, and the verification at the engine bench test was drastically reduced.

Research on On-board CO₂ Capture Technology (1st Report)
-Measurement and Modeling of CO₂ Adsorption Characteristics-

Toshiaki Sakima･Hirotsugu Matsuda･Masahiro Horikoshi･Yasuhiro Matsumura･Junya Murata･Kenji Uchida･Yuji Harada (Mazda)

A technology that captures CO2 in engine exhaust gas has been studied. From the viewpoint of efficient development, it is useful to consider a CO2 capture system using models. Therefore, based on the experimental results of CO2 adsorption characteristics, the model accounting for external film diffusion and intraparticle diffusion was considered. As a result, the adsorption rate model that can reproduce the experimental CO2 breakthrough curves was established.

Research on On-board CO₂ Capture Technology (2nd Report)
-Model-based System Design and its Verification-

Hirotsugu Matsuda･Ryo Yamamoto･Masahiro Horikoshi･Yoshihisa Nou･Toshiaki Sakima･Kenji Uchida･Yuji Harada (Mazda)

A system that can continuously capture CO2 in engine exhaust gas under the on-board constraints has been investigated. The feasibility study was carried out using 1D-CFD tools and real-scale experiments using actual exhaust gas. The results showed that the potential of about 90% of CO2 capture rate was confirmed in the range of engine power for urban driving.