A Solid Particle Number Measurement System Including Nanoparticles Smaller than 23 Nanometers

2014 ◽  
Author(s):  
Yoshinori Otsuki ◽  
Kenji Takeda ◽  
Kazuhiko Haruta ◽  
Nobuhisa Mori
Keyword(s):  
Solid Particle ◽  
Measurement System ◽  
Particle Number

scholarly journals Comparison of Solid Particle Number Emission of Gasoline Direct Injection Vehicles between CVS and Tailpipe Samplings

2021 ◽  
Vol 12 (4) ◽  
pp. 142-149
Author(s):  
Kazuki Nakamura ◽  
Izumi Fukano ◽  
Seiichi Hosogai ◽  
Christos Dardiotis ◽  
Christoph Kandlhofer
Keyword(s):  
Solid Particle ◽  
Particle Number ◽  
Direct Injection ◽  
Gasoline Direct Injection

Real-Time Measuring System for Engine Exhaust Solid Particle Number Emission - Design and Performance

2006 ◽  
Author(s):  
Qiang Wei ◽  
Karl Oestergaard ◽  
Scott Porter ◽  
Asano Ichiro ◽  
Masayuki Adachi ◽  
...  
Keyword(s):  
Real Time ◽  
Solid Particle ◽  
Particle Number ◽  
Measuring System ◽  
Engine Exhaust ◽  
And Performance

scholarly journals Emissions of a Euro 5 Motorcycle over the world harmonized motorcycle test cycle (WMTC)

2021 ◽  
Author(s):  
Barouch Giechaskiel ◽  
Anastasios Melas
Keyword(s):  
Solid Particle ◽  
High Speed ◽  
Particle Number ◽  
Cold Start ◽  
Gaseous Pollutants ◽  
Test Cycle ◽  
Passenger Cars ◽  
The World ◽  
High Concentrations

The Euro 5 limits for L-category vehicles are applicable since 2020 and for this reason there is lack of studies examining the emissions of this category. In this study we tested a 1000 cm3 Euro 5 motorcycle over the World Harmonised Motorcycle Test Cycle (WMTC). The gaseous pollutants were approximately half of their respective limits. The cold start (first 2 minutes) contributed to the majority of the emissions. The solid particle number emissions were also 6.5 times below the limit for passenger cars, but the particles not counted with the current methodology were around 2 times higher. High concentrations of volatiles were emitted at the high speed part of the cycle.

scholarly journals Evaluation of Solid Particle Number Sensors for Periodic Technical Inspection of Passenger Cars

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8325
Author(s):  
Anastasios Melas ◽  
Tommaso Selleri ◽  
Ricardo Suarez-Bertoa ◽  
Barouch Giechaskiel
Keyword(s):  
Solid Particle ◽  
Particle Number ◽  
Extreme Case ◽  
Mass Scale ◽  
Particulate Filter ◽  
Research Centre ◽  
Passenger Cars ◽  
Joint Research ◽  
Particulate Filters ◽  
Technical Inspection

Following the increase in stringency of the European regulation limits for laboratory and real world automotive emissions, one of the main transport related aspects to improve the air quality is the mass scale in-use vehicle testing. Solid particle number (SPN) emissions have been drastically reduced with the use of diesel and gasoline particulate filters which, however, may get damaged or even been tampered. The feasibility of on-board monitoring and remote sensing as well as of the current periodical technical inspection (PTI) for detecting malfunctioning or tampered particulate filters is under discussion. A promising methodology for detecting high emitters is SPN testing at low idling during PTI. Several European countries plan to introduce this method for diesel vehicles and the European Commission (EC) will provide some guidelines. For this scope an experimental campaign was organized by the Joint Research Centre (JRC) of the EC with the participation of different instrument manufacturers. Idle SPN concentrations of vehicles without or with a malfunctioning particulate filter were measured. The presence of particles under the current cut-off size of 23 nm as well as of volatile particles during idling are presented. Moreover, the extreme case of a well performing vehicle tested after a filter regeneration is studied. In most of the cases the different sensors used were in good agreement, the high sub-23 nm particles existence being the most challenging case due to the differences in the sensors’ efficiency below the cut-off size.

Investigation in Calibration Procedures for Portable and Stationary Solid Particle Number Measurement Systems

2019 ◽  
Author(s):  
Yoshinori Otsuki ◽  
Hiroshi Nakamura ◽  
Kentaro Kojima ◽  
Kenji Kondo ◽  
Kazuhiko Haruta
Keyword(s):  
Solid Particle ◽  
Particle Number ◽  
Measurement Systems
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