scholarly journals Calibration of micro-simulation model in assessment of passenger car exhaust emission during acceleration

2021 ◽  
Author(s):  
Mateusz Nowak
Keyword(s):  
Exhaust Emissions ◽  
Simulation Software ◽  
Exhaust Emission ◽  
Compression Ignition ◽  
Motion Simulation ◽  
Simulation Research ◽  
Compression Ignition Engines ◽  
Car Exhaust ◽  
Micro Simulation ◽  
Vehicle Motion

In terms of simulation research, it is important to simulate real conditions as precisely as possible. This type of approach makes it possible to minimize the error in the obtained results. The dynamics of acceleration is one of the most important factors having a direct impact on fuel consumption and exhaust emissions from vehicles. The work was carried out with the use of PTV Vissim microscopic vehicle motion simulation software. The considerations were carried out on theoretical acceleration profiles with different dynamics values and the actual character of acceleration, recorded during road tests. The simulations were carried out for a car powered by spark-ignition and compression-ignition engines. The research showed that the calibration of the acceleration character of the vehicle in simulation tests may result in significant differences in obtained results of exhaust emissions.

Japan Land Engine Manufacturers Association's Voluntary Regulation of Exhaust Emissions from Compression Ignition Engines of Less than 19kW

2005 ◽  
Author(s):  
Hidenori Hattori ◽  
Yoshiharu Yamaguchi ◽  
Yoichi Kataoka ◽  
Kazuo Kurata ◽  
Isao Konagaya ◽  
...  
Keyword(s):  
Exhaust Emissions ◽  
Compression Ignition ◽  
Voluntary Regulation ◽  
Compression Ignition Engines

scholarly journals Assessment of the potential of dimethyl ether as an alternative fuel for compression ignition engines

2017 ◽  
Vol 169 (2) ◽  
pp. 181-186
Author(s):  
Rafał SMOLEC ◽  
Marek IDZIOR ◽  
Wojciech KARPIUK ◽  
Miłosław KOZAK
Keyword(s):  
Natural Resources ◽  
Crude Oil ◽  
Dimethyl Ether ◽  
Automotive Industry ◽  
Alternative Fuel ◽  
Exhaust Emissions ◽  
Combustion Engines ◽  
Compression Ignition ◽  
Compression Ignition Engines

The main problem that the automotive industry has been dealing with since the beginning of the XXI century is the need to reduce the exhaust emissions from piston combustion engines. Another, not at all less important problem is the depleting natural resources of crude oil. There are many concepts aiming at resolving of the said issues. One of them is the possibility of application of dimethyl ether (DME) in a classic engine. The paper characterizes this fuel, drawing attention to the aspects related to the adaptation of the engine to this type of fuel, presents the process of its atomization and relevant exhaust emissions.

Study of the Variations in Cylinder-Exhaust-Gas Temperature Over Inlet Air and Operation-Input Parameters of Compression-Ignition Engines

2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Gong Chen
Keyword(s):  
Air Temperature ◽  
Thermal Loading ◽  
Exhaust Emissions ◽  
Exhaust Gas ◽  
Compression Ignition ◽  
Gas Temperature ◽  
Compression Ignition Engine ◽  
Engine Operation ◽  
Compression Ignition Engines ◽  
Exhaust Gas Temperature

Cylinder-exhaust-gas temperature (Texh) of a turbocharged compression-ignition engine indicates the levels of engine thermal loading on cylinder and exhaust components, thermal efficiency performance, and engine exhaust emissions. In consideration that Texh is affected by engine air inlet condition that primarily includes inlet air temperature (Ti) and pressure (pi), this paper studies the variation (ΔTexh) of Texh over varying the engine inlet air parameters of compression-ignition engines. The study is to understand ΔTexh with appropriate relations between the inlet parameters and Texh being identified and simply modeled. The regarded effects on Texh and ΔTexh for both naturally aspirated and turbocharged engines of this type are analyzed and predicted. The results indicate that Texh increases as Ti increases or pi decreases. The rate of variation in ΔTexh over varying Ti or pressure pi is smaller in a turbocharged engine than that in a naturally aspirated engine, as reflected from the model and results of the analysis. The results also indicate, for instance, Texh would increase approximately by ∼2 °C as Ti increases by 1 °C or increase by ∼35 °C as pi decreases by 10−2 MPa, as predicted for a typical high-power turbocharged diesel engine operating at a typical full-load condition. The design and operating parameters significant in influencing ΔTexh along with varying Ti or pi are studied in addition. These include the degree of engine cylinder compression, the level of intake manifold air temperature, the magnitude of intake air boost, and the quantity of cycle combustion thermal input. As those parameters change, the rate of variation in Texh varies. For instance, the results indicate that the rate of ΔTexh versus the inlet air parameters would increase as the quantity of cycle combustion thermal input becomes higher. With the understanding of ΔTexh, the engine output performances of thermal loading, efficiency, and exhaust emissions, concerning engine operation at variable ambient temperature or pressure, can be understood and evaluated for the purpose of engine analysis, design, and optimization.

scholarly journals Influence of Short Carbon-Chain Alcohol (Ethanol and 1-Propanol)/Diesel Fuel Blends over Diesel Engine Emissions

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1309
Author(s):  
María D. Redel-Macías ◽  
David E. Leiva-Candia ◽  
José A. Soriano ◽  
José M. Herreros ◽  
Antonio J. Cubero-Atienza ◽  
...  
Keyword(s):  
Diesel Fuel ◽  
Engine Performance ◽  
Sound Quality ◽  
Exhaust Emissions ◽  
Carbon Chain ◽  
Compression Ignition ◽  
Fuel Blends ◽  
Compression Ignition Engines ◽  
Alcohol Fuels ◽  
Short Carbon

Oxygenated fuels, in this case short carbon-chain alcohols, have been investigated as alternative fuels to power compression ignition engines. A major advantage of short-chain alcohols is that they can be produced from renewable resources, i.e., cultivated commodities or biomass-based biorefineries. However, before entering the market, the effects of short-chain alcohols on engine performance, exhaust emissions, noise and sound quality need to be understood. This work sheds light on the relationship between the physicochemical properties of the alcohol/diesel fuel blends (ethanol and 1-propanol) on engine performance, exhaust emissions and, for the first time, on noise and sound quality. It has been demonstrated that when the content of alcohol in blends increased, soot and soluble organic material emissions drastically decreased, mainly due to the increase of oxygen content in the fuel. Reduction in soot emissions combined with higher thermodynamic efficiency of alcohol fuels, with respect to diesel fuel, enable their utilization on compression ignition engines. There is also an improvement in the soot-NOx trade off, leading to large reductions on soot with a small effect on NOx emissions. The oxygen content within the fuel reduces CO and THC emissions at extra-urban driving operation conditions. However, hydrocarbons and CO emissions increased at urban driving conditions, due to the high heat of vaporization of the alcohol fuels which reduces cylinder temperature worsening fuel atomization, vaporization and mixing with air being more significant at lower cylinder temperature conditions (low engine loads and speeds). Similarly, the higher the presence of alcohol in the blend, the higher the noise emitted by the engine due to their low tendency to auto-ignition. The optimization of alcohol quantity and the calibration of engine control parameters (e.g., injection settings) which is out of the scope of this work, will be required to overcome noise emission penalty. Furthermore, under similar alcohol content in the blend (10% v/v), the use of propanol is preferred over ethanol, as it exhibits lower exhaust emissions and better sound quality than ethanol.

scholarly journals A comparative experimental study on engine operating on premixed charge compression ignition and compression ignition mode

2017 ◽  
Vol 21 (1 Part B) ◽  
pp. 441-449
Author(s):  
Girish Bhiogade ◽  
Jiwak Suryawanshi
Keyword(s):  
Experimental Study ◽  
Particulate Matter ◽  
Thermal Efficiency ◽  
Direct Injection ◽  
Fuel Mixture ◽  
Exhaust Emission ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Compression Ignition Engines ◽  
Compression Ignition Combustion

New combustion concepts have been recently developed with the purpose to tackle the problem of high emissions level of traditional direct injection Diesel engines. A good example is the premixed charge compression ignition combustion. A strategy in which early injection is used causing a burning process in which the fuel burns in the premixed condition. In compression ignition engines, soot (particulate matter) and NOx emissions are an extremely unsolved issue. Premixed charge compression ignition is one of the most promising solutions that combine the advantages of both spark ignition and compression ignition combustion modes. It gives thermal efficiency close to the compression ignition engines and resolves the associated issues of high NOx and particulate matter, simultaneously. Premixing of air and fuel preparation is the challenging part to achieve premixed charge compression ignition combustion. In the present experimental study a diesel vaporizer is used to achieve premixed charge compression ignition combustion. A vaporized diesel fuel was mixed with the air to form premixed charge and inducted into the cylinder during the intake stroke. Low diesel volatility remains the main obstacle in preparing premixed air-fuel mixture. Exhaust gas re-circulation can be used to control the rate of heat release. The objective of this study is to reduce exhaust emission levels with maintaining thermal efficiency close to compression ignition engine.

scholarly journals Comparative studies of exhaust emission from diesel engine fuelled with diesel fuel and B100 fuel

2017 ◽  
Vol 170 (3) ◽  
pp. 126-130
Author(s):  
Stanisław KRUCZYNSKI ◽  
Marcin ŚLĘZAK ◽  
Wojciech GIS ◽  
Andrzej ŻÓŁTOWSKI ◽  
Maciej GIS
Keyword(s):  
Carbon Monoxide ◽  
Diesel Engine ◽  
Vegetable Oils ◽  
Diesel Fuel ◽  
Comparative Studies ◽  
Exhaust Emission ◽  
Chemical Characteristics ◽  
Compression Ignition ◽  
Compression Ignition Engines ◽  
Physical Chemical

The article presents a comparative study of carbon monoxide, hydrocarbons, nitrogen oxides and the mass and number of particulate of diesel engine fulled with diesel and B100. B100 is a biofuel produced from vegetable oils for vehicles with compression-ignition engines. B100 fuel and diesel have similar physical-chemical characteristics which have been analyzed. The research was carried out on an engine dynamometer in four cycles: ESC, ETC, WHSC and WHTC. The article provides an analysis of the research results, preceded by a discussion of the test cycles used.

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