Influence of the chassis dynamometer regulation on the exhaust emission results

Szczotka, Andrzej; Puchałka, Bartosz; Bielaczyc, Piotr; Adamiak, Borys

doi:10.24136/atest.2019.164

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Additionally, the problem relates to the real-time representation of drag forces by the chassis dynamometer, which involves not only the basic resistance to motion, i.e., air and rolling, but also inertia resistance. The steady-state load values on the chassis dynamometer affect the results of exhaust emissions and fuel (energy) consumption [15,24,35,39,40]. The vehicle drag force, F o , for a horizontal road is described by the equation:…”

Section: Introductionmentioning

confidence: 99%

Effect of driving resistances on energy demand and exhaust emission in motor vehicles

Jaworski¹,

Lejda²

2021

Combustion Engines

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Among the fundamental factors affecting the emissions of internal combustion engines is the resistance to motion acting on the car. This is an important factor to be taken into account when testing cars in conditions simulated on a chassis dynamometer. The dependence of the driving resistance function on vehicle speed is determined on the basis of various methods, the most frequently used of which is the so-called alternative method specified in procedures for the type approval of motor vehicles with respect to the emission of pollutants in exhaust gases. The values adopted in accordance with the alternative method differ from the actual resistance acting on the car in road conditions. This is one of the reasons why the emission of pollutants and the fuel consumption of an engine in real road conditions differs from the values given by the car manufacturer, including the emission limits specified in the standards. This paper presents an evaluation of the influence of driving resistance on the energy demand and emission of pollutants in the exhaust gases by sample passenger car with SI engine fuelled by petrol and LPG.

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Section: Introductionmentioning

confidence: 99%

Effect of driving resistances on energy demand and exhaust emission in motor vehicles

Jaworski¹,

Lejda²

2021

Combustion Engines

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Error Analysis of the Normative Calculation Method of the Exhaust Emissions and Fuel Consumption in the Vehicles Fueled with Gaseous Fuels

Grzelak¹,

Taubert²

2021

Energies

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The methodologies for calculating exhaust emissions and fuel consumption, which are given in the normative documents, do not take into account the fact that vehicles equipped with liquefied petroleum gas (LPG) or compressed natural gas (CNG) systems are fueled with petrol after a cold start. When calculating exhaust emissions and fuel consumption of LPG or CNG-powered vehicles, it is assumed that they result from the combustion of gaseous fuel only. This simplification leads to an incorrect determination of the emissions and fuel consumption values, as the formulas for calculating these values differ depending on the fuel type. This article presents the results of tests aimed at checking how that factor affects the value of emissions and fuel consumption calculated in the driving cycles used in the type-approval tests. In order to estimate the error resulting from this simplification, the tests of exhaust emissions and fuel consumption of a vehicle equipped with an LPG system were carried out. The tests were carried out on a chassis dynamometer in the worldwide harmonized light vehicles test cycle (WLTC) used in the type approval tests. In the tested vehicle, the CO, total hydrocarbons (THC), NOx and CO2 emissions calculated with the normative method were approx. 7% lower than the values calculated with the corrected method. For this reason, there is a need to develop a measurement method that allows for a separate analysis of the phase in which the vehicle is fueled with gasoline. This will allow the elimination of errors in the current normative method of calculating pollutant emissions from the exhaust system and fuel consumption of vehicles fueled with gaseous fuels.

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The Impact of Driving Resistances on the Emission of Exhaust Pollutants from Vehicles with the Spark Ignition Engine Fuelled with Petrol and LPG

Jaworski¹,

Mądziel²,

Kuszewski³

et al. 2020

SAE Technical Paper Series

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Influence of the chassis dynamometer regulation on the exhaust emission results

Cited by 3 publications

References 13 publications

Effect of driving resistances on energy demand and exhaust emission in motor vehicles

Effect of driving resistances on energy demand and exhaust emission in motor vehicles

Error Analysis of the Normative Calculation Method of the Exhaust Emissions and Fuel Consumption in the Vehicles Fueled with Gaseous Fuels

The Impact of Driving Resistances on the Emission of Exhaust Pollutants from Vehicles with the Spark Ignition Engine Fuelled with Petrol and LPG

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