Testing and evaluating real driving emissions with PEMS

Czerwiński, Jan; Zimmerli, Yan; Hüssy, Andreas; Engelmann, Danilo; Bonsack, Peter; Remmele, Edgar; Huber, Georg

doi:10.19206/ce-2018-302

Cited by 9 publications

(5 citation statements)

References 7 publications

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“…PEMS measure undiluted exhaust gas with all the associated challenges (e.g., condensation, wear of instruments) [19]. In contrast to studies assessing instruments for ambient air or personal exposure (e.g., [20][21][22][23][24][25]), the assessment of PN PEMS is limited [13,[26][27][28][29]. The studies gave maximum differences of 50% (light-duty) to 65% (heavy-duty) to the laboratory systems for the majority of the cases.…”

Section: Introductionmentioning

confidence: 99%

Assessment of 10-nm Particle Number (PN) Portable Emissions Measurement Systems (PEMS) for Future Regulations

Giechaskiel

Lähde

Gandi³

et al. 2020

IJERPH

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The particle number (PN) emissions of vehicles equipped with particulate filters are low. However, there are technologies that can have high PN levels, especially below the currently lower regulated particle size of 23 nm. Sub-23-nm particles are also considered at least as dangerous as the larger ultrafine particles. For this reason, the European Union (EU) is planning to regulate particles down to 10 nm. In this study we compared prototype portable emission measurement systems (PEMS) and reference laboratory systems measuring from 10 nm. The tests included cycles and constant speeds, using vehicles fuelled with diesel, gasoline or liquefied petroleum gas (LPG). The results showed that the PEMS were within ±40% of the reference systems connected to the tailpipe and the dilution tunnel. Based on the positive findings and the detection efficiencies of the prototype instruments, a proposal for the technical specifications for the future regulation was drafted.

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Section: Introductionmentioning

confidence: 99%

Assessment of 10-nm Particle Number (PN) Portable Emissions Measurement Systems (PEMS) for Future Regulations

Giechaskiel

Lähde

Gandi³

et al. 2020

IJERPH

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“…A further big step in the EU regulation was the control of vehicles on the road with portable emissions measurement systems (PEMS) during real-driving emissions (RDE) testing [5][6][7][8]. On-board vehicle testing requires small, lightweight instruments and consequently the technical requirements of the laboratory grade equipment were relaxed for PEMS.…”

Section: Introductionmentioning

confidence: 99%

Assessment of two condensation particle counters (CPCs) in photometric mode for high concentration exhaust emission measurements

Giechaskiel¹,

Melas²,

Mamakos³

2023

Combustion Engines

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Condensation particle counters (CPCs) use light scattering to count particles after they have grown to micron size in a supersaturated environment. In single counting mode each particle is counted depending on whether the scattered light exceeds a threshold value or not. In photometric mode the total scattered light is converted in particle number concentration. While for laboratory grade particle number systems, CPCs are allowed to operate only in single counting mode, there is no such requirements for portable emissions measurements systems (PEMS) for real-driving emissions (RDE) testing or for instruments for periodic technical inspection (PTI) of vehicles. In this study two CPCs of the same model were assessed in single counting and photometric modes with silver and graphite particles with sizes ranging from 10 nm to 100 nm. The results showed that the concentration was measured accurately enough for particles in the 25 nm to 50 nm size range, but was underestimated and overestimated for smaller and larger particles, respectively. The key message is that the photometric mode should be avoided or calibrated in function of concentration and particle size.

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“…Majority of publications pertains to engine testing in research tests based on the averaged values [14][15][16][17][18][19][20]. Such engine are homologation test ones performed on a chassis dynamometer whose characteristic feature is that the processes of velocity and motion resistance may be deemed as determined based on the repeatability of the tests.…”

Section: Introductionmentioning

confidence: 99%

“…As has already been mentioned, majority of the publications treating on the properties of combustion engines operating under dynamic states, determined by the velocity processes and motion resistance in the test, mainly contain the results from the entire test [14][15][16][17][18][19][20][21]. Merkisz and Pielecha [20] presented the results of investigations on the exhaust emissions from a diesel engine under actual traffic conditions.…”

Section: Introductionmentioning

confidence: 99%

“…A high sensitivity of the exhaust emissions was observed to the properties of both tests. Czerwinski et al [16] performed a comparison of the investigation results of passenger vehicles tested with different PEMS systems on a chassis dynamometer as well as on the road. In addition, in [17], the authors presented the results of the investigations on the exhaust emissions from a diesel engine in the homologation procedure and in the RDE test.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Research on Exhaust Emissions in Dynamic Operating States of a Combustion Engine in a Real Driving Emissions Test

et al. 2021

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The paper describes the method of investigations of exhaust emissions from a combustion engine under operation classified in terms of its dynamic states. In this paper, the engine operating states are determined through the vehicle driving under actual traffic conditions in the RDE (Real Driving Emissions) test. Based on the recorded tracings of the vehicle velocity, the engine states were classified as static for the acceleration of the absolute value lower than the adopted classification limit. Besides, the authors analyzed the engine operating states for the positive as well as negative acceleration. For the adopted engine operating states, zero-dimensional characteristics of the emission intensity for individual exhaust components were determined (average value, coefficient of variation). The influence of the analyzed operating states on the emission of individual exhaust components was assessed. The greatest increase in the intensity of the emission of nitrogen oxides was observed for the positive vehicle acceleration model and the lowest (also for the nitrogen oxides) for the negative vehicle acceleration. On average, the greatest increase in the emission intensity of pollutants and the intensity of particle number occurred for the dynamic states of the engine corresponding to positive acceleration. The conclusions from the performed investigations entitle the authors to propose a greater allowance for the exhaust emission-related criteria in the engine control algorithms.

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Testing and evaluating real driving emissions with PEMS

Cited by 9 publications

References 7 publications

Assessment of 10-nm Particle Number (PN) Portable Emissions Measurement Systems (PEMS) for Future Regulations

Assessment of 10-nm Particle Number (PN) Portable Emissions Measurement Systems (PEMS) for Future Regulations

Assessment of two condensation particle counters (CPCs) in photometric mode for high concentration exhaust emission measurements

Research on Exhaust Emissions in Dynamic Operating States of a Combustion Engine in a Real Driving Emissions Test

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