Experimental Investigation of Discoloration Generated by a CI ICE's Exhaust Gas on Various Stone Types

Farkas, Orsolya; Szabados, György; Antal, Ákos; Török, Ákos

doi:10.3311/pptr.12120

Cited by 5 publications

(5 citation statements)

References 22 publications

(26 reference statements)

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“…11, Table 3). The visual inspection of colour changes suggests that the exhaust gas caused major discolouration as it was previously recorded [21], but this colour change could be different under different illuminations. It was pointed out in the previous studies of pure natural stones [25], but additional research is needed to describe the colour changes caused by exhaust gas under different illuminations.…”

Section: Changes Of Parameters Before and After The Exposuresupporting

confidence: 54%

“…Operating conditions (1300 r/min and 50% load) of the RÁBA D10 UTSLL 160, EuroII engine were controlled and the temperature inside the chamber, gas phase components and k absorption coefficient were continuously measured during the test. The engine operating point was chosen due to the higher k value [18][19][20][21]. The fuel used was gas oil complying with MSZ EN 590 from MOL fuel station.…”

Section: Pollution Of Stones -Exposure Chambermentioning

confidence: 99%

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Effect of Exhaust Gas on Natural Stone Tablets, a Laboratory Experiment

Farkas

Török

2018

Period. Polytech. Civil Eng.

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8 different natural stone types were exposed to exhaust gas under laboratory conditions to assess urban stone damage. 3 cm in diameter cylindrical test specimens were made from travertine, non-porous limestone, limestone, rhyolite tuff, sandstone, andesite, granite and marble. The samples were exposed for 1, 2, 4 and 8 hours to exhaust gas that was generated by compression ignition internal combustion engine. The exhaust emission was measured. The operating conditions of the engine were documented and several parameters (weight, density, ultrasonic pulse velocity, capillary water absorption, porosity) were measured before and after exhaust gas exposure. The tests indicate that despite the deposition of soot on the surface a significant material loss was recorded at rhyolite tuff (2m%) and at andesite (1m%). The penetration depth of soot was also different for different lithologies. A correlation was found between the ultrasonic pulse velocity and density of tested stones.

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Section: Changes Of Parameters Before and After The Exposuresupporting

confidence: 54%

Section: Pollution Of Stones -Exposure Chambermentioning

confidence: 99%

Effect of Exhaust Gas on Natural Stone Tablets, a Laboratory Experiment

Farkas

Török

2018

Period. Polytech. Civil Eng.

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“…Pressure sensor (6) is placed in the injector mount, while the rest of the model calculates mass flowrate according to eq. (1). This setup allows to simulate the measurement accurately, so measured and simulated calculated mass flow rates can be compared to simulated injector flowrate.…”

Section: Wherementioning

confidence: 99%

“…In recent decades, exhaust emissions of road vehicles have decreased considerably due to the strict emission standards introduced by different countries [1]. These standards urged researchers to develop cleaner operating vehicles and among others to focus on combustion development, as a key factor in reducing raw emissions.…”

Section: Introductionmentioning

confidence: 99%

A model based new method for injection rate determination

Vass

Zöldy

2021

THERM SCI

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This paper presents a detailed model of a Common Rail Diesel injector and its validation using injection rate measurement. A new method is described for injector nozzle flowrate determination using simulation and measurement tools. The injector model contains fluid dynamic, mechanic and electro-magnetic systems, describing all-important internal processes and also includes the injection rate meter model. Injection rate measurements were made using the W. Bosch method, based on recording the pressure traces in a length of fuel during injections. Comparing the results of the simulated injection rate meter, simulated injector orifice flow and injection rate measurements, the simulated and measured injection rates showed good conformity. In addition to this, the difference between nozzle flow rate and the measured flow rate is pointed out in different operating points, proving, that the results of a Bosch type injection rate measurements cannot be directly used for model validation. However, combining injector, injection rate meter simulation and measurement data, the accurate nozzle flow rate can be determined, and the model validated.

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“…However, it is highly time and resource consuming to set up the system for all operating points of different engines. Controlling combustion is the best tool to minimise tail pipe emission that is one of the most neuralgic barriers of the utilisation of diesel engines [3,4].…”

Section: Introductionmentioning

confidence: 99%

Detailed Model of a Common Rail Injector

Vass

Zöldy

2019

Acta Universitatis Sapientiae, Electrical and Mechanical Engineering

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This work is about the validation of a Common Rail (CR) injector model. The model describes injector internal behavior in a detailed way, validation is done using dosage measurements and needle lift traces. The model contains fluid dynamic, mechanic and electro-magnetic parts describing all important internal processes. To compare the modelling results against measurement data, three test cases were chosen on a medium duty test engine to represent a wide range of operation points. Dosage measurements were done by averaging the injected mass of 1500 injections, each measurement repeated three times. Needle displacement was measured using an injector equipped with a needle lift sensor in the same operating points. The results of the simulated injector and the measured values showed good conformity both in needle displacement and injected fuel mass, so the model can be a basis for further injector and combustion analyses.

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Experimental Investigation of Discoloration Generated by a CI ICE's Exhaust Gas on Various Stone Types

Abstract: Abstract

Cited by 5 publications

References 22 publications

Effect of Exhaust Gas on Natural Stone Tablets, a Laboratory Experiment

Effect of Exhaust Gas on Natural Stone Tablets, a Laboratory Experiment

A model based new method for injection rate determination

Detailed Model of a Common Rail Injector

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