Behaviour of CI engine performance, combustion and exhaust emission with neem biodiesel at varied fuel injection rates

2018 ◽  
Vol 40 (7) ◽  
pp. 749-753 ◽  
Author(s):  
L. Karikalan ◽  
M. Chandrasekaran ◽  
T. Vinod Kumar ◽  
R. Sridhar
Keyword(s):  
Fuel Injection ◽  
Engine Performance ◽  
Exhaust Emission ◽  
Ci Engine ◽  
Injection Rates

Distribution of Two-Stage Direct Injection CNG-Air Mixture near Lean Limit Using CFD

2013 ◽  
Vol 465-466 ◽  
pp. 448-452
Author(s):  
Mas Fawzi ◽  
Bukhari Manshoor ◽  
Yoshiyuki Kidoguchi ◽  
Yuzuru Nada
Keyword(s):  
Fuel Injection ◽  
Direct Injection ◽  
Engine Performance ◽  
Injection Pressure ◽  
Gas Jet ◽  
Exhaust Emission ◽  
Injection Technique ◽  
Injection Timing ◽  
Two Stage ◽  
Lean Burn

Previous work shows that gas-jet ignition with two-stage injection technique is effective to extend lean combustible ranges of CNG engines. In this report, the robustness of the gas-jet ignition with two-stage injection method was investigated purposely to improve the performance of a lean burn direct injection CNG engine. The experiment was conducted using an engine at speed of 900 rpm, fuel-injection-pressure of 3MPa, equivalence ratio at 0.8, and ignition timing at top dead center. The effect of first injection timing on the test engine performance and exhaust emission was analyzed. First injection timings near the gas-jet ignition produced unstable combustion with occurrence of misfires except at a timing which produced distinctively good combustion with low HC and CO emissions. Computational fluid dynamics was used to provide hindsight of the fuel-air mixture distribution that might be the cause of misfires occurrence at certain injection timings.

Experimental and Theoretical Study of Injection Timing on Performance and Exhaust Emissions in a Port-Injected Gasoline Engine

2006 ◽  
Author(s):  
E. Movahednejad ◽  
F. Ommi ◽  
M. Hosseinalipour ◽  
O. Samimi
Keyword(s):  
Gasoline Engine ◽  
Fuel Injection ◽  
Engine Performance ◽  
Fuel Mixture ◽  
Exhaust Emissions ◽  
Operating Conditions ◽  
Exhaust Emission ◽  
Injection Timing ◽  
Intake Port ◽  
One Dimensional

For spark ignition engines, the fuel-air mixture preparation process is known to have a significant influence on engine performance and exhaust emissions. In this paper, an experimental study is made to characterize the spray characteristics of an injector with multi-disc nozzle used in the engine. The distributions of the droplet size and velocity and volume flux were characterized by a PDA system. Also a model of a 4 cylinder multi-point fuel injection engine was prepared using a fluid dynamics code. By this code one-dimensional, unsteady, multiphase flow in the intake port has been modeled to study the mixture formation process in the intake port. Also, one-dimensional air flow and wall fuel film flow and a two-dimensional fuel droplet flow have been modeled, including the effects of in-cylinder mixture back flows into the port. The accuracy of model was verified using experimental results of the engine testing showing good agreement between the model and the real engine. As a result, predictions are obtained that provide a detailed picture of the air-fuel mixture properties along the intake port. A comparison was made on engine performance and exhaust emission in different fuel injection timing for 2600 rpm and different loads. According to the present investigation, optimum injection timing for different engine operating conditions was found.

Engine performance, exhaust emission and combustion analysis of a 4-stroke spark ignited engine using dual fuel injection

Fuel ◽  
2017 ◽  
Vol 207 ◽  
pp. 719-728 ◽  
Author(s):  
D. Ramasamy ◽  
C.Y. Goh ◽  
K. Kadirgama ◽  
F. Benedict ◽  
M.M. Noor ◽  
...  
Keyword(s):  
Fuel Injection ◽  
Engine Performance ◽  
Exhaust Emission ◽  
Dual Fuel ◽  
Combustion Analysis

scholarly journals Performance and Emission Analysis of a CI Engine in Dual Mode with LPG and Karanja Oil Methyl Ester

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
S. K. Acharya ◽  
S. P. Jena
Keyword(s):  
Methyl Ester ◽  
Engine Performance ◽  
Exhaust Emission ◽  
Dual Fuel ◽  
Oxides Of Nitrogen ◽  
Liquefied Petroleum Gas ◽  
Emission Analysis ◽  
Performance And Emission ◽  
Ci Engine ◽  
Karanja Oil

The use of liquefied petroleum gas (LPG) is experimented with to improve the performance of a dual fuel compression ignition (CI) engine running on Karanja oil methyl ester (KOME) blends. Diesel is used as a reference fuel for the dual fuel engine results. During the experimentation, the engine performance is measured in terms of brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC), and exhaust emission is measured in terms of carbon monoxide (CO), hydrocarbon (HC), and oxides of nitrogen (). Dual fuel engine with LPG showed a reduction in and smoke emission; however, it suffers from high HC and CO emission, particularly, at lower loads due to poor ignition. Comparison of performance and emissions is done for diesel and blends of KOME. Results showed that using KOME blends (10% and 20%) has improved the CI engine performance with a reduction in HC and CO emissions.

scholarly journals Impacts of Blending Feed Stock Generated Biodiesel on Performance and Emission Parameters of Diesel Engine-Review

2020 ◽  
pp. 294-297
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Engine Performance ◽  
Injection Pressure ◽  
Emission Characteristics ◽  
Exhaust Gas ◽  
Performance Parameters ◽  
Exhaust Gas Emission ◽  
Ci Engine ◽  
Fuel Injection Pressure

Alternative fuels are in demand to overcome limitations of fossil fuels since decades. Indian Standards of biodiesel exists and its wide application is appealed and a National Policy on Bio fuels was implemented by Ministry of New and Renewable Energy. This Paper presents a review of biodiesel, Indian standards and difference of ASTM/EN for biodiesel. Biodiesel and its different blend fuelled in Diesel engine exhibit different engine performance and exhaust gas emission characteristics. Various performance parameters affects compression ignition diesel engine (DI-CI) performance, list includes fuel injection pressure, fuel quantity injected and injection timing, shape of combustion chamber, position and size of injection nozzle hole, fuel spray pattern, etc. Few paramount factors governing DI-CI engine includes various types of biodiesel and its blending with diesel engine. Types of blending are namely mahua, jatropha, karanja, waste cooking oil etc. Authors have blended them with varying percentage with varying fuel injection pressure at different loads. Few have also used alumina as nano additives in mahua biodiesel (B25100Al2O3) to check it effects on performance parameters as well as on emission characteristics. Effect of blending with Karanja, Jatropha, Neem , mahua etc as biodiesel with inclusion of alumina as nano additives are reviewed for related performance parameters (i.e. brake thermal efficiency (BTE), brake specific fuel consumption (BSFC)) and emission characteristics (i.e. CO, HC, NOx) in exhaust gas emission in different conditions for DI-CI Engine performance.

scholarly journals THE INFLUENCE OF TURPENTINE ADDITIVE ON THE ECOLOGICAL PARAMETERS OF DIESEL ENGINES

Transport ◽  
2007 ◽  
Vol 22 (2) ◽  
pp. 80-82 ◽  
Author(s):  
Algis Butkus ◽  
Saugirdas Pukalskas ◽  
Zenonas Bogdanovičius
Keyword(s):  
Diesel Engines ◽  
Engine Performance ◽  
Positive Influence ◽  
Pollutant Emission ◽  
Exhaust Emission ◽  
Compression Ignition ◽  
Fuel Blend ◽  
Renewable Fuel ◽  
Ci Engine ◽  
The Eu

After Lithuania's accession to the EU it is very important to use a larger amount of renewable fuel. Based on economic and environmental considerations in Lithuania, we are interested in studying the effects of turpentine contents in the blended turpentine‐diesel fuel on the engine performance and pollutant emission of compression ignition (CI) engine. Therefore, we used engine test facilities to investigate the effects on the engine performance and pollutant emission of 5 % turpentine in the fuel blend. The tests were carried out in the laboratory on an engine dynamometer of the car Audi 1Z and tractor D21 diesel engines. The experimental results showed that turpentine used in the fuel blend for these diesel engines had a positive influence on the engine performance and exhaust emission.

Effect of Two-Stage Injection Timing on a Gas-Jet Ignition CNG Engine

2014 ◽  
Vol 663 ◽  
pp. 342-346
Author(s):  
Mas Fawzi Mohd Ali ◽  
Amir Khalid ◽  
Yoshiyuki Kidoguchi
Keyword(s):  
Fuel Injection ◽  
Engine Performance ◽  
Injection Pressure ◽  
Gas Jet ◽  
Exhaust Emission ◽  
Injection Technique ◽  
Injection Timing ◽  
Two Stage ◽  
Lean Burn ◽  
Cng Engine

Compressed natural gas (CNG) engines normally operate in lean condition to take the advantage of higher efficiency and better fuel economy. Several studies have shown that gas-jet ignition with two-stage injection technique is effective to extend the lean combustible range of CNG engines. This paper investigates the effectiveness of such technique using a prototype lean burn direct injection CNG engine. The experiment was conducted at speed of 900 rpm, fuel injection pressure of 3 MPa, equivalence ratio φ=0.8, and ignition timing at top dead center. The effect of first injection timing on the test engine performance and exhaust emission was analyzed. The result shows that the first injection timing is crucial in determining the performance of the engine. First injection timings when the piston is near to bottom dead center produced relatively stable combustion. First injection timings when the piston is at midpoint produced misfire. First injection timings near the gas-jet ignition produced unstable combustion except at a certain timings which produced acceptable combustion with low hydrocarbon and carbon monoxide emissions.

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