Research and development of an advanced combustion system for the direct injection diesel engine

2005 ◽  
Vol 219 (2) ◽  
pp. 241-252 ◽  
Author(s):  
W H Su ◽  
T J Lin ◽  
H Zhao ◽  
Y Q Pei
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Direct Injection ◽  
Combustion System ◽  
Multiple Injections ◽  
Hcci Combustion ◽  
Advanced Combustion ◽  
Chamber Design ◽  
Low Load ◽  
Di Diesel Engine

In order to obtain a simultaneous reduction in both NOx and particulate emissions from a direct injection (DI) diesel engine, an advanced combustion system has been researched and developed in the authors' laboratory. The new combustion system comprises homogeneous charge compression ignition (HCCI) combustion at low load by early and multiple injections, combined HCCI, and lean diffusion burning at medium and higher load conditions by means of a novel combustion chamber design and multiple injections. In this paper, the research and development of the enhanced mixing by means of a raised round object (referred to in this paper as BUMP) and its application to a diesel combustion chamber design is described. Then the experimental results from a DI diesel engine equipped with a multiple injection common rail (CR) fuel injection system and the new combustion chamber design will be presented and discussed. Engine testing has shown that the BUMP combustion chamber was very effective in reducing both NOx and smoke emissions. HCCI combustion by means of multiple injections leads to extremely low NOx emissions under low load operations. At medium and higher load operation conditions, quasi HCCI combustion combined with the BUMP combustion chamber could signficantly reduce NOx emissions without sacrificing particulate emission and fuel consumption.

Relationship Between Visible Spray Observations and DI Diesel Engine Performance

2000 ◽  
Vol 122 (4) ◽  
pp. 596-602
Author(s):  
Takashi Watanabe ◽  
Susumu Daidoji ◽  
Keshav S. Varde
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Swirling Flow ◽  
Direct Injection ◽  
Engine Performance ◽  
Design Parameters ◽  
Bench Test ◽  
Injection Technique ◽  
Bench Study ◽  
Di Diesel Engine

This investigation was conducted to enhance understanding of combustion in a direct injection (DI) diesel engine with square combustion chamber. The investigation included a bench study of spray and its interaction with the chamber and correlation with engine performance. The bench study was conducted by using a liquid injection technique (LIT). The technique relies on the use of instantaneous photo images of emulsified fuel spray patterns to deduce spray behavior. It captures spray images in forced swirling flow on a positive film, which was used to deduce fuel-air mixing by scattering radiation technique. Three different chamber configurations, with different ratios of arc radius (r) to inscribed circle radius (R), and several spray deflecting angles were used in the study. The best parameters were found to be a deflecting angle of about 30 deg and a ratio of r/R of about 0.65. The results of the bench test were used to compare engine performance at similar design parameters. The engine performance was found to be superior at the above values of r/R and the deflecting angle. Engine exhaust of NOx and exhaust smoke were found to be lower at these design parameters. The experimental technique of using emulsified spray with LIT can be used qualitatively to evaluate effects of combustion chamber and fuel system design variables on engine performance. [S0742-4795(00)00104-6]

scholarly journals Effect of Combustion Chamber Design on a DI Diesel Engine Fuelled with Jatropha Methyl Esters Blends with Diesel

2013 ◽  
Vol 64 ◽  
pp. 479-490 ◽  
Author(s):  
Venkata Ramesh Mamilla ◽  
M.V. Mallikarjun ◽  
G. Lakshmi Narayana Rao
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Methyl Esters ◽  
Chamber Design ◽  
Di Diesel Engine

Explorative Investigation on Cashew Nut Shell Liquid Biodiesel blended with Ethanol and Hydrogen in Direct Injection (DI) Diesel Engine and prediction through Artificial Neural Network

2021 ◽  
Author(s):  
Thanigaivelan V ◽  
Lavanya R
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Direct Injection ◽  
Cashew Nut Shell Liquid ◽  
Single Cylinder ◽  
Direct Injection Diesel Engine ◽  
Cashew Nut ◽  
Di Diesel Engine ◽  
Artificial Neural ◽  
Cashew Nut Shell

Abstract Emission from the DI diesel engine is series setback for environment viewpoint. Intended for that investigates for alternative biofuel is persuaded. The important hitches with the utilization of biofuels and their blends in DI diesel engines are higher emanations and inferior brake-thermal efficiency as associated to sole diesel fuel. In this effort, Cashew nut shell liquid (CNSL) biodiesel, hydrogen and ethanol (BHE) mixtures remained verified in a direct-injection diesel engine with single cylinder to examine the performance and discharge features of the engine. The ethanol remained supplemented 5%, 10% and 15% correspondingly through enhanced CNSL as well as hydrogen functioned twin fuel engine. The experiments done in a direct injection diesel engine with single-cylinder at steadystate conditions above the persistent RPM (1500RPM). Throughout the experiment, emissions of pollutants such as fuel consumption rate (SFC), hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx) and pressure of the fuel were also measured. cylinders. The experimental results show that, compared to diesel fuel, the braking heat of the biodiesel mixture is reduced by 26.79-24% and the BSFC diminutions with growing addition of ethanol from the CNSL hydrogen mixture. The BTE upsurges thru a rise in ethanol proportion with CNSL hydrogen mixtures. Finally, the optimum combination of ethanol with CNSL hydrogen blends led to the reduced levels of HC and CO emissions with trivial upsurge in exhaust gas temperature and NOx emissions. This paper reconnoiters the routine of artificial neural networks (ANN) to envisage recital, ignition and discharges effect.

Engine Analysis of Single Cylinder DI Diesel Engine Fuelled With Sunflower Oil, Sunflower Oil Methyl Ester and Its Blends

2006 ◽  
Author(s):  
V. Anandram ◽  
S. Ramakrishnan ◽  
J. Karthick ◽  
S. Saravanan ◽  
G. LakshmiNarayanaRao
Keyword(s):  
Diesel Engine ◽  
Methyl Ester ◽  
Sunflower Oil ◽  
Direct Injection ◽  
Emission Characteristics ◽  
Single Cylinder ◽  
Performance And Emission ◽  
Di Diesel Engine ◽  
Engine Emission ◽  
Oil Sunflower

In the present work, the combustion, performance and emission characteristics of sunflower oil, sunflower methyl ester and its blends were studied and compared with diesel by employing them as fuel in a single cylinder, direct injection, 4.4 KW, air cooled diesel engine. Emission measurements were carried out using five-gas exhaust gas analyzer and smoke meter. The performance characteristics of Sunflower oil, Sunflower methyl ester and its blends were comparable with those of diesel. The components of exhaust such as HC, CO, NOx and soot concentration of the fuels were measured and presented as a function of load and it was observed that the blends had similar performance and emission characteristics as those of diesel. NOx emissions of sunflower oil methyl ester were slightly higher than that of diesel but that of sunflower oil was slightly lower than that of diesel. With respect to the combustion characteristics it was found that the biofuels have lower ignition delay than diesel. The heat release rate was very high for diesel than for the biofuel.

scholarly journals Effect of combustion chamber geometry on performance, combustion, and emission of direct injection diesel engine with ethanol-diesel blend

2016 ◽  
Vol 20 (suppl. 4) ◽  
pp. 937-946 ◽  
Author(s):  
Venkadesan Gnanamoorthi ◽  
Navin Marudhan ◽  
Devaradjane Gobalakichenin
Keyword(s):  
Diesel Engine ◽  
Combustion Chamber ◽  
Direct Injection ◽  
Direct Injection Diesel Engine
Sign in / Sign up

Export Citation Format

Share Document