scholarly journals Assessment of the Internal Catalyst Efficiency in a Diesel Engine of a Vehicle under the Conditions Simulating Real Driving

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6569
Author(s):  
Monika Andrych-Zalewska ◽  
Zdzisław Chłopek ◽  
Jerzy Merkisz ◽  
Jacek Pielecha
Keyword(s):  
Diesel Engine ◽  
Exhaust Emissions ◽  
Similarity Criteria ◽  
Vehicle Speed ◽  
Test Results ◽  
Engine Operation ◽  
Exhaust Gas Aftertreatment ◽  
Vehicle Operation ◽  
Unique Method ◽  
The Time Domain

The application of a catalyst on a surface inside a combustion chamber is known as a supplementary method of exhaust gas aftertreatment. The efficiency of this method in the reduction in exhaust emissions as well as its influence on other engine properties has been analyzed in multiple scientific works. Most often, these works present the results of investigations carried out on dynamometers under engine stationary conditions. There are no results of the catalyst investigations performed under dynamic states, particularly on-going real time analyses during engine operation. Therefore, the authors set out to explore the efficiency of the in-cylinder catalyst of a diesel engine under dynamic conditions simulating actual vehicle operation. A unique methodology was applied. The investigations were carried out in road conditions in a test simulating the New European Driving Cycle (NEDC) homologation test in compliance with the similarity criteria of the zero-dimensional characteristics of vehicle speed during the investigations and in the homologation test. For the research, the authors used portable exhaust emissions measurement equipment. A unique method of test results analysis was also applied (a continuous method in the time domain). As a result of the tests being repeated several times, it was observed that the application of an internal catalyst under different operating engine conditions repeatedly results in: an approx. 2% reduction in the emissions of carbon monoxide, hydrocarbons, and carbon dioxide; a similar increase in the emission of nitrogen oxides; and a significant (over 10%) reduction in the particle number. The obtained results substantiate the purpose of actions aiming at improving the efficiency of the internal catalyst.

scholarly journals Exhaust emission from a vehicle engine operating in dynamic states and conditions corresponding to real driving

2019 ◽  
Vol 178 (3) ◽  
pp. 99-105
Author(s):  
Monika ANDRYCH-ZALEWSKA ◽  
Zdzisław CHŁOPEK ◽  
Jerzy MERKISZ ◽  
Jacek PIELECHA
Keyword(s):  
Rotational Speed ◽  
Time Derivative ◽  
Exhaust Emission ◽  
Test Results ◽  
Engine Operation ◽  
Vehicle Engine ◽  
University Of Technology ◽  
The Time Domain ◽  
Speed Characteristic ◽  
Dynamic States

The article presents the exhaust emission results from a diesel engine in dynamic states of engine operation in the driving tests: NEDC (New European Driving Cycle) and Malta test, developed at the Poznan University of Technology. The NEDC and Malta tests were carried out as simulations on the engine test bench mimicking the driving tests conditions. The test results of the emission of carbon monoxide, hydrocarbons and nitrogen oxides obtained in each of the tests were presented. The dynamic states have been classified de-pending on the time derivative value of the torque and engine rotational speed. Both the positive and negative as well as zero time deriv-ative values of torque and rotational speed were considered. Therefore, overall six types of dynamic states were analyzed. A high sensi-tivity of exhaust emission to various types of dynamic states was found. The exhaust emission sensitivity to dynamic states in the Malta test was found to be higher than for the NEDC test, although these tests have similar properties (average rotational speed and average torque). This is due to the fact that the NEDC test is created on the basis of the similarity of zero-dimensional characteristics of the cars speed characteristic, whereas the Malta test was designed in accordance with the principle of faithful representation in the time domain of the NEDC speed curve.

Effect of alternative fuels on exhaust emissions during diesel engine operation with matched combustion phasing

Fuel ◽  
2010 ◽  
Vol 89 (2) ◽  
pp. 438-456 ◽  
Author(s):  
Octavio Armas ◽  
Kuen Yehliu ◽  
André L. Boehman
Keyword(s):  
Diesel Engine ◽  
Alternative Fuels ◽  
Exhaust Emissions ◽  
Engine Operation

scholarly journals The influence of the driving speed on the exhaust emissions

2014 ◽  
Vol 156 (1) ◽  
pp. 41-47
Author(s):  
Jerzy MERKISZ ◽  
Marianna JACYNA ◽  
Maciej ANDRZEJEWSKI ◽  
Jacek PIELECHA ◽  
Agnieszka MERKISZ-GURANOWSKA
Keyword(s):  
Exhaust Emissions ◽  
Point Of View ◽  
Vehicle Speed ◽  
Portable Equipment ◽  
The Road ◽  
Traffic Conditions ◽  
Driving Speed ◽  
Vehicle Operation ◽  
Harmful Substances ◽  
Research Equipment

The aim of the study is to verify the thesis about the influence of the vehicle speed on the exhaust emissions. The influence of the speed on the fuel consumption is quite easily measurable and generally possible to identify, while determining the emissions of harmful substances requires specialized research equipment. The analysis is important from the point of view of the vehicle operation. The paper presents the results of the road tests of a car fitted with a diesel engine. It contains the results of measurements of the concentration of the exhaust components. In the measurements, PEMS portable equipment was used. The study was conducted under actual traffic conditions (motorway driving) on a selected portion of the A2 motorway, located near Poznan.

scholarly journals Effect of the boost pressure on basic operating parameters, exhaust emissions and combustion parameters in a dual-fuel compression ignition engine

2017 ◽  
Vol 170 (3) ◽  
pp. 115-120
Author(s):  
Sławomir LUFT ◽  
Tomasz SKRZEK
Keyword(s):  
Exhaust Emissions ◽  
Dual Fuel ◽  
Operating Parameters ◽  
Boost Pressure ◽  
Test Results ◽  
Compression Ignition Engine ◽  
Engine Operation ◽  
Operation Costs ◽  
Basic Operating ◽  
Energy Share

The dual-fuel engine enables application of various fuels. One of such fuels is propane or its mixture with butane (LPG). Application of such fuels results in reduction of engine operation costs. The paper presents effect of application of such fuel in a turbocharged dualfuel engine on basic operating parameters, exhaust emissions and basic combustion parameters. Test results in the form of load characteristics for various boost ratios obtained for dual-fuel engine were compared to corresponding results obtained for conventional engine operating on diesel fuel only. The obtained results indicate that it is possible a dual-fuel operation with the propane energy share of 70% for maximum engine loads.

scholarly journals Toxicity of Exhaust Fumes (CO, NOx) of the Compression-Ignition (Diesel) Engine with the Use of Simulation

2019 ◽  
Vol 11 (8) ◽  
pp. 2188 ◽  
Author(s):  
Karol Tucki ◽  
Remigiusz Mruk ◽  
Olga Orynycz ◽  
Katarzyna Botwińska ◽  
Arkadiusz Gola ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Diesel Engine ◽  
Nitrogen Oxides ◽  
Carbon Dioxide Emissions ◽  
Methyl Esters ◽  
Exhaust Emissions ◽  
Solid Particles ◽  
Motor Vehicles ◽  
Engine Operation ◽  
Limit Value

Nowadays more and more emphasis is placed on the protection of the natural environment. Scientists notice that global warming is associated with an increase of carbon dioxide emissions, which results inter alia from the combustion of gasoline, oil, and coal. To reduce the problem of pollution from transport, the EU is introducing increasingly stringent emission standards which should correspond to sustainable conditions of the environment during the operation of motor vehicles. The emissivity value of substances, such as nitrogen oxides (NOx), hydrocarbons (HC), carbon monoxide (CO), as well as solid particles, was determined. The aim of this paper was to examine, by means of simulation in the Scilab program, the exhaust emissions generated by the 1.3 MultiJet Fiat Panda diesel engine, and in particular, carbon monoxide and nitrogen oxides (verified on the basis of laboratory tests). The Fiat Panda passenger car was selected for the test. The fuels supplied to the tested engine were diesel and FAME (fatty acid methyl esters). The Scilab program, which simulated the diesel engine operation, was the tool for analyzing the exhaust toxicity test. The combustion of biodiesel does not necessarily mean a smaller amount of exhaust emissions, as could be concluded on the basis of information contained in the subject literature. The obtained results were compared with the currently valid EURO-6 standard, for which the limit value for CO is 0.5 g/km, and for NOx − 0.08 g/km, and it can be seen that the emission of carbon monoxide did not exceed the standards in any case examined. Unfortunately, when analyzing the total emissions of nitrogen oxides, the situation was completely the opposite and the emissions were exceeded by 20–30%.

TEST RESULTS FOR TOXICITY AND REDUCING TOXIC EXHAUST EMISSIONS OF THE MARINE DIESEL ENGINE

2018 ◽  
Author(s):  
Van Ha Pham ◽  
◽  
Ha Hiep Nguyen ◽  
Keyword(s):  
Experimental Investigation ◽  
Diesel Engine ◽  
Diesel Fuel ◽  
Exhaust Emissions ◽  
Marine Diesel Engine ◽  
Nox Emissions ◽  
Test Results ◽  
Test Cycle ◽  
Marine Diesel ◽  
Comparative Experimental Investigation

The tests were carried out on the marine diesel engine operating by the load characteristic in seven modes, including five modes according to the test cycle D2 regulated by ISO 8178. Based on the experimental results obtained, the specific weighted NOx emissions and their average values were calculated and compared with IMO regulations. In addition, the study carried out a comparative experimental investigation on diesel fuel and dimethyl ether, and different injector opening pressures in the marine diesel engine to reduce its toxic exhaust emissions.

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