scholarly journals Studies on a CI engine using orange skin powder diesel solution with different fuel nozzle opening pressure

2009 ◽  
Vol 13 (3) ◽  
pp. 103-112 ◽  
Author(s):  
Krishnan Purushothaman ◽  
Govindan Nagarajan
Keyword(s):  
Diesel Fuel ◽  
Direct Injection ◽  
Combustion Process ◽  
Opening Pressure ◽  
Brake Thermal Efficiency ◽  
Combustion Duration ◽  
Performance And Emissions ◽  
Fuel Nozzle ◽  
Nozzle Opening Pressure ◽  
Nozzle Opening

Experiments have been conducted to study the effect of nozzle opening pressure on the combustion process and exhaust emissions of a direct injection diesel engine fueled with orange skin powder diesel solution (OSPDS). Earlier investigation by the authors revealed that 30% OSPDS was optimum for better performance and reduced emissions. In the present investigation the nozzle opening pressure was varied with 30% OSPDS and the combustion, performance, and emissions characteristics were studied and compared with those of diesel fuel. The different nozzle opening pressures studied were 215 bar, 235 bar, and 255 bar. The results showed that the cylinder pressure with 30% OSPDS at 235 bar fuel nozzle opening pressure, was higher than that of diesel fuel as well as at other nozzle opening pressures. Similarly, the ignition delay was longer with shorter combustion duration in case of 30% OSPDS at 235 bar nozzle opening pressure. The brake thermal efficiency was higher at 235 bar than that of other fuel nozzle opening pressures with OSPDS and lower than that of diesel fuel. The NOx emission was higher and HC and CO emissions were lower with 30% OSPDS at 235 bar. The smoke emission was marginally lower at 235 bar and marginally higher at 215 bar than diesel fuel. The performance of the engine at 235 bar nozzle opening pressure was better with reduction in emissions except NOx than other nozzle opening pressures.

scholarly journals Performance and Emissions of Diesel Engine Using Bio-Fuel Derived From Waste Fish Oil

2012 ◽  
Author(s):  
Nadia Mrad ◽  
Fethi Aloui ◽  
Mohand Tazerout
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Chemical Properties ◽  
Diffusion Combustion ◽  
Brake Thermal Efficiency ◽  
Combustion Duration ◽  
Performance And Emissions ◽  
Cracking Process ◽  
Physical And Chemical ◽  
And Diffusion

In the present work, waste fish fat from fish processing industry is considered as an energy source for diesel engines. In this regard, catalytic cracking process is considered for this present study. The physical and chemical properties of biofuel are very close to diesel fuel. The experiments were conducted in a single cylinder diesel engine to study the performance, emission and combustion characteristics of biofuel. As a result, fuel undergoes good combustion and hence there is significant improvement in performance and reduction in emissions. Experimental results indicate a marginal increase in brake thermal efficiency at all loads compared to diesel fuel. The results show that despite of high NOx and CO2, the engine has lesser UHC, CO and PM than standard diesel fuel. The premixed and diffusion combustion duration is decreased with biofuel compared to diesel fuel. The engine was running smooth at all load conditions with biofuel. It is concluded that the biofuel derived from waste fish fat can be consider as a substitute for diesel fuel.

Characteristics of performance and emissions in high-speed direct injection diesel engine fueled with diethyl ether/diesel fuel blends

Energy ◽  
2012 ◽  
Vol 43 (1) ◽  
pp. 214-224 ◽  
Author(s):  
Dimitrios C. Rakopoulos ◽  
Constantine D. Rakopoulos ◽  
Evangelos G. Giakoumis ◽  
Athanasios M. Dimaratos
Keyword(s):  
Diesel Engine ◽  
Diethyl Ether ◽  
Diesel Fuel ◽  
High Speed ◽  
Direct Injection ◽  
Direct Injection Diesel Engine ◽  
Fuel Blends ◽  
Performance And Emissions

Development of Gasoline Direct Injection Engine for Improving Brake Thermal Efficiency Over 44%

2020 ◽  
Vol 142 (10) ◽  
Author(s):  
Dongwon Jung ◽  
Byeongseok Lee ◽  
Jinwook Son ◽  
Soohyung Woo ◽  
Youngnam Kim
Keyword(s):  
Thermal Efficiency ◽  
Direct Injection ◽  
Stability Limit ◽  
Spark Ignition ◽  
Gasoline Direct Injection ◽  
Brake Thermal Efficiency ◽  
Gasoline Direct Injection Engine ◽  
Combustion Duration ◽  
Test Engine ◽  
Gas Recirculation

Abstract This study demonstrates the effects of technologies applied for the development of gasoline direct injection (GDI) engine for improving the brake thermal efficiency (BTE). The test engine has a relatively high stroke to bore ratio of 1.4 with a displacement of 2156 cm3. All experiments have been conducted for stoichiometric operation at 2000 RPM. First, since compression ratio (CR) is directly related to the thermal efficiency, four CR were explored for operation without exhaust gas recirculation (EGR). Then, for the same four CR, EGR was used to suppress the knock occurrence at high loads, and its effect on initial and main combustion duration was compared. Second, the shape of intake port was revised to increase tumble flow for reducing combustion duration, and extending EGR-stability limit further. Then, as an effective method to ensure stable combustion for EGR-diluted stoichiometric operation, the use of twin spark ignition (SI) system is examined by modifying both valve diameters of intake and exhaust, and its effect is compared against that of single spark ignition. In addition, the layout of twin spark ignition was also examined for the location of front-rear and intake-exhaust. To get the maximum BTE at high load, 12 V electronic super charger (eSC) was applied. Under the condition of using 12 V eSC, the effect of intake cam duration was identified by increasing from 260 deg to 280 deg. Finally, 48 V eSC was applied with the longer intake camshaft duration of 280 deg. As a result, the maximum BTE of 44% can be achieved for stoichiometric operation with EGR.

scholarly journals IMPACT OF ADDING OXYGENATES TO DIESEL FUEL ON ENGINE’S PERFORMANCE AND EMISSIONS

2019 ◽  
Vol 20 (3) ◽  
pp. 225-238
Author(s):  
Marwa Naji Kareem ◽  
Adel M. Saleh
Keyword(s):  
Diesel Fuel ◽  
Direct Injection ◽  
Nitric Oxides ◽  
Higher Alcohol ◽  
Performance And Emission ◽  
State Tests ◽  
Engine Speed Range ◽  
Performance And Emissions ◽  
Di Diesel Engine ◽  
Unburned Hydrocarbons

??investigation of performance and emission of conventional a four-stroke, single-cylinder direct injection (DI) diesel engine at variable engine speed range from (1500 to 3000 rpm), carried out at steady-state tests conditions with diesel fuel and biodiesel which is produced from sun flower oil mixed with the higher alcohol. The blends effects on the performance and emission for the blended fuels measured and compared. 10% and 15% of Pentanol, Octanol added to the biodiesel blended with diesel for various test conditions. The experimental results showed an approximately 2–9% increase in the brake-specific fuel consumption (BSFC) for the prepared blends of pentanol and octanol due to the lower heating value (LHV), with higher brake thermal efficiency compared to diesel fuel. With expressively reduction of (9.8-21% vol.) in carbon monoxide (CO), and total unburned hydrocarbons (THCs) of (65-78.3% ppm), and nitric oxides (NOx) (44.4–52.9% ppm). The combustion analyses showed that the addition of biodiesel to conventional diesel fuel decreased the ignition delay and reduced the properties. These results indicated that biodiesel and higher alcohol could be used without any engine modifications as an alternative and environmentally friendly fuel.

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