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タイトル
和文: 
英文:Real World Emissions Analysis Using Sensor-basedEmissions Measurement System for Light-dutyDirect-Injection Gasoline Vehicle 
著者
和文: イアン チャンパニャ, 佐藤 進, Kotaro Tanaka, Takeshi Tange, CHEN JIAXIN.  
英文: Chanpaya Eang, Susumu Sato, Kotaro Tanaka, Takeshi Tange, Jiaxin Chen.  
言語 English 
掲載誌/書名
和文: 
英文:SAE Technical Paper 
巻, 号, ページ        
出版年月 2022年3月29日 
出版者
和文: 
英文: 
会議名称
和文: 
英文:SAE World Congress Experience 
開催地
和文: 
英文:Detroit 
DOI https://doi.org/10.4271/2022-01-0572.
アブストラクト In recent years, particulate matter (PM) emitted from direct-injection gasoline vehicles is becoming an increasingly concerning problem. In addition, it is often reported that ammonia (NH3) is emitted from gasoline vehicles equipped with a three-way catalyst. These emissions might be largely emitted especially when driving in on-road driving conditions. In this study, we investigated the emissions, NOx, NH3, and PM/PN (particulate number) of a light-duty direct-injection gasoline vehicle when driving on actual roads. Using a small direct-injection gasoline vehicle equipped with a threeway catalyst, experiment was conducted 8 times on the same route, and these emissions were measured. In this study, vehicle specific power (VSP) was introduced, which can be calculated using vehicle parameters, vehicle speed, and road gradient. The effects of parameters acquired through on-board diagnostics (OBD) port and VSP on emissions were investigated. Based on these measurements, "where" and "how much" NOx, NH3, and PM/PN were emitted were emphasized. As a result, it was clarified that a large amount of NOx is emitted after the fuel is cut during deceleration, NH3 is emitted when the air-fuel ratio becomes rich, and PM/PN is emitted during rapid acceleration of the vehicle. Cross-correlation function is also introduced to identify parameters that has similar properties to avoid redundancy when analyzing the causes and effects of the exhaust gas emissions.

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