Experimental study on combustion and emission characteristics of GCI engines under cooperative-control of operating parameters

2021 ◽  
pp. 1-36
Author(s):  
Yuke Wang ◽  
Changkun Wu ◽  
Mingzhang Pan ◽  
Jiaying Pan
Keyword(s):  
Thermal Efficiency ◽  
Cooperative Control ◽  
Combustion Stability ◽  
Emission Characteristics ◽  
Brake Thermal Efficiency ◽  
Multiple Parameters ◽  
Start Of Injection ◽  
Load Limit ◽  
Engine Combustion ◽  
C 50

Abstract This study investigated the effects of cooperative-control of the start of injection (SOI), excess air ratio (γ), internal EGR (I-EGR) and intake air temperature (IAT) on the combustion and emission characteristics of GCI engines, especially regards to the combustion stability and knock characteristics. And optimizing the GCI engine combustion and emissions through the cooperative control of multiple parameters is the innovation of this research. The results showed that advancing the SOI and increasing the I-EGR ratio can significantly expand the low-load limit, but the heating effect of 20% I-EGR only worked when the SOI was earlier. Appropriate increase of γ could increase the maximum brake thermal efficiency (BTE) to 40.06%, but resulted in high knock probability and high NOx emissions. Rising the IAT was more effective than advancing the SOI in improving combustion fluctuations, but the knock probability and knock intensity were more sensitive to the early SOI. When the SOI varied from 26 °CA BTDC to 30 °CA BTDC, the γ was 1~1.5, the I-EGR ratio was 5%~20%, and the IAT was 40°C~50°C, the GCI engine can obtain the balance among high thermal efficiency, high combustion stability, low knock probability, and low emissions.

Development of an exhaust gas recirculation strategy for an acetylene-fuelled homogeneous charge compression ignition engine

2010 ◽  
Vol 224 (7) ◽  
pp. 941-952 ◽  
Author(s):  
K Sudheesh ◽  
J M Mallikarjuna
Keyword(s):  
Thermal Efficiency ◽  
Homogeneous Charge Compression Ignition ◽  
Exhaust Gas Recirculation ◽  
Electrical Heating ◽  
Exhaust Gas ◽  
Compression Ignition ◽  
Brake Thermal Efficiency ◽  
Load Limit ◽  
Gas Recirculation ◽  
Load Conditions

This paper deals with experimental investigations carried out to develop an exhaust gas recirculation (EGR) strategy for an acetylene-fuelled homogeneous charge compression ignition (HCCI) engine. This study involves an analysis of the external inlet charge heating, the use of a mix of hot EGR and cool EGR to extend the load range, and the performance of the engine in the acetylene HCCI mode. First, experiments are conducted on a single-cylinder engine in the acetylene HCCI mode with external electrical heating at different load conditions, and the best inlet charge temperatures at each load condition are obtained. Second, hot EGR or a mix of hot EGR and cool EGR (i.e. the EGR strategy) is used to reduce or eliminate external charge heating and to extend the upper load limit, or to improve the brake thermal efficiency. In both cases, the engine performance is compared with that of the conventional diesel compression ignition (CI) mode. It is found that with EGR, above 25 per cent of load, the upper load limit at different inlet charge temperatures increases by about 16 28 per cent without any external charge heating. Below 25 per cent of load, the electrical heating at different inlet charge conditions is reduced by about 67–87 per cent. The brake thermal efficiency increases by 5–24 per cent under all the load conditions and it is comparable with that in the conventional CI mode. In the HCCI mode, nitrogen oxide levels are less than 20ppm. Smoke levels are always lower than 0.1 Bosch smoke unit. Hydrocarbon and carbon monoxide emissions are relatively higher than for the conventional CI mode.

Impact of Oxidation Inhibitors on Performance and Emission Characteristics of a Low Heat Rejection Engine

2017 ◽  
Vol 8 (4) ◽  
Author(s):  
P.S. Kumar ◽  
S.A. Kannan ◽  
A. Kumar ◽  
K.A.V. Geethan
Keyword(s):  
Combustion Chamber ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Specific Fuel Consumption ◽  
Nox Emission ◽  
Emission Characteristics ◽  
Brake Thermal Efficiency ◽  
Heat Rejection ◽  
Oxidation Inhibitors ◽  
Low Heat Rejection Engine

In this study, for the first time analysis of a low heat rejection engine was carried out along with the addition of oxidation inhibitors. If the combustion chamber components of the engine such as piston, cylinder head, and inlet and outlet valves are insulated with a thermal barrier material, then the engine will be referred as low heat rejection engine. In this study yttria stabilized zirconia was coated on the combustion chamber components for a thickness of about 150 microns. Then the analysis of performance parameters such as brake thermal efficiency and specific fuel consumption and emission characteristics such as emission of carbon monoxide, hydrocarbon and nitrogen oxide was carried out in single cylinder four stroke diesel engine with electrical loading using diesel and pongamia methyl ester as the fuels. The major problem associated with the usage of biodiesels and low heat rejection engine is the increased NOX emission than the normal engine operated with the diesel. This problem has been overcome by the usage of oxidation inhibitors such as ethyl hexyl nitrate (EHN), tert-butyl hydroquinone (TBHQ). The results showed that addition of oxidation inhibitors leads to increase in brake thermal efficiency, reduced specific fuel consumption and reduced NOX emission.

scholarly journals An Assessment on Performance Characteristics of Diesel Engine Using Lemongrass-Diesel Oil Fuel Blends

2021 ◽  
Author(s):  
Naveen Rana ◽  
Harikrishna Nagwan ◽  
Kannan Manickam
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Thermal Efficiency ◽  
Specific Fuel Consumption ◽  
Performance Characteristics ◽  
Emission Characteristics ◽  
Brake Specific Fuel Consumption ◽  
Brake Thermal Efficiency ◽  
Fuel Blends

Abstract Indeed, the development of alternative fuels for use in internal combustion engines has become an essential requirement to meet the energy demand and to deal with the different problems related to fuel. The research in this domain leads to the identification of adverse fuel properties and for their solution standard limits are being defined. This paper outlines an investigation of performance and combustion characteristics of a 4-stroke diesel engine using different cymbopogon (lemongrass) - diesel fuel blends. 10% to 40% cymbopogon is mixed with diesel fuel and tested for performance characteristics like brake specific fuel consumption and brake thermal efficiency. To obtain emission characteristics smoke density in the terms of HSU has been measured. In result, it has observed that there is an increase of 5% in brake thermal efficiency and 16.33% decrease in brake specific fuel consumption. Regarding emission characteristics, a 12.9% decrease in smoke emission has been found.

Investigations of DI CI engine using algal particles contained coconut biodiesel

2019 ◽  
pp. 52-61
Author(s):  
Katam Ganesh Babu ◽  
A. Veeresh Babu ◽  
K. Madhu Murthy
Keyword(s):  
Engine Performance ◽  
Calorific Value ◽  
Emission Characteristics ◽  
Nox Emissions ◽  
Third Generation ◽  
Brake Thermal Efficiency ◽  
Performance And Emission ◽  
Greenhouse Emissions ◽  
Engine Combustion ◽  
Ci Engine

Day to day increasing vehicles usage for human activities is caused to accumulate greenhouse emissions into the environment. The biodiesel is a best alternative fuel to run diesel engines. But its lower Calorific value and higher NOx emissions makes the consumer should compromise with engine performance and emission characteristics. As we know, that the use of additives to improve engine Combustion and emissions are caused to increase the fuel cost due to the higher cost of additives. The biodiesel conversion process of third generation biodiesel is costlier and required technological advancements for qualitative fuel. In the present work, the author used mixed culture micro algal particles in Coconut biodiesel (CCNME+AP) to improve engine characteristics. The Brake Thermal Efficiency (BTE) was enhanced, and the NOx emissions were less due to the absorption of heat in the Combustion chamber, it led to cool combustion phenomena with the Algal particles contained Coconut Biodiesel (CCNME+AP).

scholarly journals Performance and Emission Analysis of CIDI Engine Fueled with Palm Biodiesel Blends and Nano Particles

2019 ◽  
Vol 9 (2) ◽  
pp. 640-646
Keyword(s):  
Methyl Ester ◽  
Fuel Consumption ◽  
Palm Oil ◽  
Diesel Fuel ◽  
Thermal Efficiency ◽  
Nano Particles ◽  
Emission Characteristics ◽  
Emission Analysis ◽  
Brake Thermal Efficiency ◽  
Biodiesel Blends

The diesel fuel is most extensively used fossil fuel in automotives and a single major source of hazardous environment pollutant across the globe. As of late, the exploration thinks about distinguished that plant based biodiesel are turning into a promising option sustainable fuel and the consumable/non-eatable oils and creature fats can be utilized feed-stock in arrangement of biodiesel, in light of the fact that its chemical properties practically like fossil diesel fuel, non-poisonous, clean consuming and inexhaustible source. In this work, the performance analysis and emission characteristics of single cylinder, 4-stroke, and water cooled diesel engine was carried-out using Palm oil methyl ester as biodiesel alternative to diesel fuel. Experimental tests have been conducted with range of engine loads using palm oil methyl ester (PME) and its diesel blends with biodiesel in the ratio of 10:90 (B10), 20:80 (B20), and 30:70 (B30), 40:60 (B40), PME 100% (B100) and petro-diesel 100% by volume with and without antimony tin oxide (ATO) additive. In this research work brake power (BP), brake thermal efficiency (BTE), brake specific fuel consumption (BSFC), fuel consumption (FC) are considered as engine performance characteristics and carbon monox ide (CO), hydro carbons (HC), oxides of nitrogen (NOx) are considered as emission characteristics. The experimental results revealed that B10 blend of biodiesel has comparable brake thermal efficiency as diesel. B10 has lowest and B100 has highest BSFC, FC among all the biodiesel blends and biodiesel has lower CO emission, lower HC emission and moderately higher NOx emission when compared with diesel. B10 has shown comparable performance as diesel and it can be considered as alternative to diesel fuel.

scholarly journals Investigating the Performance, Reduction of Emission and Combustion Characteristics of YSZ Coated D.I.Diesel Engine Powered by Binary Bio-fuels

2021 ◽  
Vol 72 (1) ◽  
pp. 53-65
Author(s):  
Anandavelu Kothandapany ◽  
Viswanath Krishnan
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Calorific Value ◽  
Heat Liberation ◽  
Emission Characteristics ◽  
Cylinder Pressure ◽  
Performance Study ◽  
Brake Thermal Efficiency ◽  
Performance Reduction

Performance, emission and combustion studies were carried out on the ceramic coated diesel engine (YSZ) fed with biodiesel obtained from the oil derived from the mango seeds (MSBD) and MSBD blended with turpentine oil (MSBTO). The performance study showed that the MSBD and MSBTO blends showed 3.6% and 7.1% more BSFC value compared to that of DF in ceramic coated engine due to higher density and viscosity. The maximum brake thermal efficiency was observed 28% for DF in coated engine compared to other fuels due to less fuel consumption of DF because of lower density. The emission characteristics displayed that the MSBTO fuel showed 12%, 15.2% and 29.1% reduction in the smoke density, NOx and CO respectively compared to that of DF in coated engine. However, the MSBD and MSBTO showed 17 and 21% more release of UBHC at full conditions compared to that of DF in ceramic coated engine due to lesser calorific values of MSBD and MSBTO compared to the calorific value of DF. Combustion study revealed that the MSBD and MSBTO displayed less cylinder pressure compared to that of DF in coated engine and the MSBTO fuel showed the 5.3% decrease in the cylinder pressure compared to that of DF in coated engine owing to less heat liberation and lower cetane value. HRR followed the similar trend of variation of cylinder pressure and the MSBTO displayed 7.4% lower HRR compared to that of DF in coated engine.

scholarly journals Experimental Analysis on Performance and Emission Characteristics of C.I. Engine Fueled by Neem Oil Biodiesel with Additive

2020 ◽  
Vol 9 (3) ◽  
pp. 2264-2268
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Ethyl Ether ◽  
Thermal Efficiency ◽  
Experimental Analysis ◽  
Emission Characteristics ◽  
Brake Specific Fuel Consumption ◽  
Neem Oil ◽  
Brake Thermal Efficiency ◽  
Performance And Emission

In this present work, experiments were conducted on a VCR Diesel engine with diesel, Neem oil biodiesel and Di-ethyl ether mixed with neem oil biodiesel. The performance and emission characteristics were evaluated and compared. The study shown that the Brake thermal efficiency increased and the brake specific fuel consumption reduced with B10 blend of neem oil biodiesel compared to diesel. The emissions of CO, CO2 were reduced but HC and smoke were increased with the use of biodiesel than diesel. The addition of Diethyl Ether (DEE) further improved the performance and decreased the emissions of CO and CO2 of the engine at B20DEE20 blend compared to other blends of biodiesel and diesel.

scholarly journals Characteristics of Poultry Litter Biodiesel with Magnalium and Cobalt Oxide as a Additives

2019 ◽  
Vol 8 (2S5) ◽  
pp. 191-195
Keyword(s):  
Cobalt Oxide ◽  
Thermal Efficiency ◽  
Specific Energy Consumption ◽  
Poultry Litter ◽  
Maximum Load ◽  
Emission Characteristics ◽  
Brake Thermal Efficiency ◽  
Performance And Emission ◽  
Ci Engine ◽  
Test Fuel

The importance of bio diesel in CI engine has substantiated, the recent research has been motivated on the use of different Nano materials as additives in diesel engines. The present investigation is to study the performance and emission characteristics of a single cylinder direct injection CI engine using transesterified Poultry litter(PL) biodiesel blend with and without Cobalt oxide and Magnalium nanoparticles as additives. This biodiesel blends with diesel, and biodiesel-diesel-nanoparticles with each and both the nano additives are tested in CI engine with constant speed of 1600 rpm with variation loads low to high. The performance parameters like Brake power, Brake specific energy consumption, Brake specific fuel consumption and efficiency of both Mechanical and volumetric are measured by VCR engine setup, emission characteristics like NO2 , CO, UBHC are measured by GAS ANALYSER these results are compared with pure diesel or neat diesel. The NO emissions gradually reduced for B20 Co3O4 Al-mg test fuel with percentage of 7.5% to the diesel and B20 to 11% for the diesel. Under maximum load of 10%, observed that there is improvement in Brake thermal efficiency for B20Al-Mg 30ppm Co3O4 30ppm and followed by 9% improvement in Brake thermal efficiency for B20 Co3O4 30ppm and followed by 4% increase in biodiesel test fuel, compared to diesel.

Performance and Emission Characteristics of a Mixed Biodiesel Fueled CI Engine

2015 ◽  
Vol 766-767 ◽  
pp. 557-561
Author(s):  
S. Arunprasad ◽  
Thangavel Balusamy ◽  
S. Sivalakshmi
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Emission Characteristics ◽  
Brake Specific Fuel Consumption ◽  
Brake Thermal Efficiency ◽  
Biodiesel Blends ◽  
Performance And Emission ◽  
Ci Engine ◽  
Smoke Opacity

In this present paper, an attempt has been made to examine the performance and emission characteristics of a single cylinder diesel engine fueled with blends of mixed biodiesel (Thevetia peruviana, Neem, Jatropha, Pongamia). Experiments were conducted with various blends of mixed biodiesel in CI engine for different loads. The results show that lower brake thermal efficiency and higher brake specific fuel consumption were obtained with mixed biodiesel blends when compared with diesel. Lower the value of CO and HC and higher the value of CO2 emissions were determined for mixed biodiesel blends compared to that of diesel. Also, higher in NOx and lower smoke opacity were found compared to diesel.

An Experimental Investigation on Performance, Combustion and Emission Characteristics of a Low Heat Rejection Engine Using Diesel and Diethyl Ether Blends

2017 ◽  
Author(s):  
Krishnamani Selvaraj ◽  
Mohanraj Thangavel ◽  
Ravikumar Bikramsingh
Keyword(s):  
Diethyl Ether ◽  
Thermal Efficiency ◽  
Waste Heat ◽  
Cooling System ◽  
Research Work ◽  
Load Condition ◽  
Emission Characteristics ◽  
Brake Thermal Efficiency ◽  
Heat Rejection ◽  
Low Heat Rejection Engine

This research work investigates the performance, combustion and emission characteristics of a low heat rejection engine operated on diesel and diethyl ether blends. The combustion chamber walls of the diesel engine insulated by ceramic material were referred to as low heat rejection (LHR) engine. In the LHR engine, an improvement in fuel economy would be obtained by recovering the waste heat rejected to the cooling system as useful work. Initially, the diesel fuel was tested in the conventional engine as a baseline reading for comparison. Then the engine was insulated by coating the engine components of the piston crown and the cylinder liner with aluminum titanate using plasma spray method. In this work, the experiments are conducted using diesel and diethyl ether blends in a conventional and low heat rejection engine at constant speed condition. The experimental results indicate that the brake thermal efficiency increases with increased percentage of diethyl ether in the blends. The maximum brake thermal efficiency was found to be 33.24% for LHR engine using diesel-diethyl ether blend (Diesel 85% & Diethyl ether 15% by volume) at full load condition. The emissions of carbon monoxide and hydrocarbon are decreased due to better combustion characteristics and higher NOx emissions are observed with low heat rejection engine (LHR) compared to the conventional engine using diesel and blended fuels.

Sign in / Sign up

Export Citation Format

Share Document