International Journal of Automotive and Mechanical Engineering, Dec 24, 2018
This paper presents an experimental investigation carried out on a "single cylinder diesel engine... more This paper presents an experimental investigation carried out on a "single cylinder diesel engine upgraded with a common rail direct injection (CRDI) system. Tests were conducted by fuelling high-speed diesel (HSD) and Simarouba biodiesel (SOME) blends to study the influence of injection pressure (IPR) and injection timing (ITG) on the performance and emissions. Four unique IPR of 400 bar, 600 bar, 800 bar and 1000 bar with four different ITG of 10°, 13°, 15° and 18° before top dead center (bTDC) combinations were taken for study with the engine loading varied from 25% to full load. Critical performance parameter like brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) were calculated, while, the primary emission parameters of the diesel engine, the NOx and smoke opacity were recorded. From the results it is concluded that the given engine recorded favourable results at IPR-ITG combination of 800 bar and 13° bTDC for all fuels tested at higher load conditions specifically at 75% load to full load. Among the different fuels investigated SOME30 yielded the best performance and moderate emission at this combination of IPR-ITG.
Indian journal of science and technology, Dec 20, 2016
This paper discusses the combined impact of high injection pressure and injection timings on the ... more This paper discusses the combined impact of high injection pressure and injection timings on the performance and combustion characteristics of a diesel engine using biodiesel ester of Simarouba oil (SOME) blends. A Kirloskar make single cylinder 3.7 kW (5 HP) capacity diesel engine was modified to operate with Common Rail Direct Injection (CRDI) system. Experiments were carried on this engine with CRDI setup, fueled with diesel and SOME biodiesel to optimize the combined Injection Pressure (IP) and Injection Timing (IT). A combination of three different IP of 600 bar, 800 bar, 1000 bar and four different injection timings (IT) of 10°, 18°, 23°, 28° before Top Dead Centre (bTDC) were tested at a constant Compression Ratio (CR) of 16.5, engine speed of 1500 rpm by varying load from 25% to 100% of full load. Maximum Brake Thermal Efficiency (BTE) was recorded at IP of 800 bar and IT of 18°bTDC CA combination for HSD, SOME 20 and SOME 30. Peak pressure and Heat Release Rates (HRR) were studied for IT of 23°bTDC and found maximum values with IP 800 bar for neat diesel (HSD). The findings of this study encourage and emphasize the probability of admitting the higher percentage biodiesel blends with HSD by the make use of a proper combination of high fuel injection pressure and injection timing. Hence it serves to overcome the depletion of neat diesel and its environmental issues.
This paper presents an experimental investigation carried out on a “single cylinder diesel engine... more This paper presents an experimental investigation carried out on a “single cylinder diesel engine upgraded with a common rail direct injection (CRDI) system. Tests were conducted by fuelling high-speed diesel (HSD) and Simarouba biodiesel (SOME) blends to study the influence of injection pressure (IPR) and injection timing (ITG) on the performance and emissions. Four unique IPR of 400 bar, 600 bar, 800 bar and 1000 bar with four different ITG of 10°, 13°, 15° and 18° before top dead center (bTDC) combinations were taken for study with the engine loading varied from 25% to full load. Critical performance parameter like brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) were calculated, while, the primary emission parameters of the diesel engine, the NOx and smoke opacity were recorded. From the results it is concluded that the given engine recorded favourable results at IPRITG combination of 800 bar and 13° bTDC for all fuels tested at higher load conditions sp...
International Journal of Automotive and Mechanical Engineering, 2018
A single cylinder diesel engine upgraded to operate Common Rail Direct Injection (CRDI) system an... more A single cylinder diesel engine upgraded to operate Common Rail Direct Injection (CRDI) system and employed in this investigation. Tests were conducted on this engine using High-Speed diesel (HSD) and Simarouba biodiesel (SOME) blends to determine the influence of Injection Pressure (IP) and Injection Timing (IT) on the performance and emissions. Four unique IP of 400 bar to 1000 bar, in steps of 200 bar and four differing ITs of 10°, 13°, 15° and 18° before Top Dead Center (bTDC) combinations were attempted for the 25% to full load. Compression Ratio (CR) of 16.5 and Engine speed of 1500 RPM was kept constant during all trails. Critical performance parameter like Brake Thermal Efficiency (BTE) and Brake Specific Fuel Consumption (BSFC) were analyzed, primary emission parameters of the diesel engine The NOx and Smoke opacity were recorded. Finally, the outcomes of each combination were discussed.
This paper discusses the combined impact of high injection pressure and injection timings on the ... more This paper discusses the combined impact of high injection pressure and injection timings on the performance and combustion characteristics of a diesel engine using biodiesel ester of Simarouba oil (SOME) blends. A Kirloskar make single cylinder 3.7 kW (5 HP) capacity diesel engine was modified to operate with Common Rail Direct Injection (CRDI) system. Experiments were carried on this engine with CRDI setup, fueled with diesel and SOME biodiesel to optimize the combined Injection Pressure (IP) and Injection Timing (IT). A combination of three different IP of 600 bar, 800 bar, 1000 bar and four different injection timings (IT) of 10°, 18°, 23°, 28° before Top Dead Centre (bTDC) were tested at a constant Compression Ratio (CR) of 16.5, engine speed of 1500 rpm by varying load from 25% to 100% of full load. Maximum Brake Thermal Efficiency (BTE) was recorded at IP of 800 bar and IT of 18°bTDC CA combination for HSD, SOME 20 and SOME 30. Peak pressure and Heat Release Rates (HRR) were studied for IT of 23°bTDC and found maximum values with IP 800 bar for neat diesel (HSD). The findings of this study encourage and emphasize the probability of admitting the higher percentage biodiesel blends with HSD by the make use of a proper combination of high fuel injection pressure and injection timing. Hence it serves to overcome the depletion of neat diesel and its environmental issues.
International Journal on Applied Bio-Engineering, 2014
Diesel engines are the primary source of power for heavy duty vehicles; diesel engines have bette... more Diesel engines are the primary source of power for heavy duty vehicles; diesel engines have better fuel economy than equivalent gasoline engines and produce less green house gas emission. On the other hand, formation of smoke due to diffusion combustion and emission of oxides of nitrogen released due to high combustion temperatures are the major limitations of the existing diesel engine designs. Diesel engine manufacturers have to address these most critical situations to meet the future emissions regulations whilst improving performance and fuel economy at a minimal cost. The fuel economy, increased dynamic response and strict exhaust emission regulations resulted in invention of new technology development required improving the diesel engine performance along with exhaust emissions reduction. These improvements are made possible with new fueling technologies by improvements in combustion process through increased injection pressure. High pressure fuel injection results in better fuel atomisation and improves the fuel/air mixing to promote complete combustion, thereby increasing the fuel efficiency with emission control. The objective of this paper is to investigate the effect of fuel injection pressure on performance, fuel consumption and emission of a diesel engine. A study was done on a single cylinder 4 stroke direct injection diesel engine and the performance and emission characteristics were presented graphically. Based on experimental results, the best performance was found at 220 bar fuel injection pressure.
International Journal of Latest Research in Science and Technology
Diesel engine combustion quality is based on the formation of fuel-air mixture. Enormous efforts ... more Diesel engine combustion quality is based on the formation of fuel-air mixture. Enormous efforts have made to reduce the harmful diesel engine emissions. High engine noise, Particulate matter (PM) and NOx production are the results of improper combustion process and considered as the major constraints. The performance and emission characteristics of diesel engines depend on many parameters. Precise control over the fuel injection process is one of the most important factors and plays a very important role in combustion to increase the engine performance with minimal exhaust emission. The injection system must satisfy high pressure capability, injection pressure control, flexible timing control, and injection rate control. The purpose of this study is to find the performance and exhaust emission of diesel engines by implementing the combination of various high injection pressures and variable injection timings. Present paper is concentrated towords optimization of the best combinatio...
Diesel engines provide high fuel efficiency hence widely used on heavy duty transport application... more Diesel engines provide high fuel efficiency hence widely used on heavy duty transport applications. Diesel engines even have reduction in CO2 emission, which is believed to be the main cause for global warming. The main disadvantage of diesel engine is it emits nitrogen oxides (NOX) and particulate matter (PM), which are considered as the main toxic gases. These emissions are therefore limited by the environment regulating authorities in almost all the countries. A best way to reduce the nitrogen oxide emissions of a diesel engine is the use of exhaust gas recirculation (EGR). EGR is a device which recirculates a portion of an engine's exhaust gas back into the combustion chamber. NOx is produced when a mixture of nitrogen and oxygen is subjected to high temperature in the combustion chamber. This can be reduced by using EGR which helps in maintaining the lower combustion chamber temperatures and reduces peak combustion temperature, which in turn reduces the formation of NOX. The aim of the present paper intends the study on performance and emission rates of a diesel engine equipped with EGR system and to find the EGR system importance in the reduction of NOx as well as particulate matter (PM) emissions with improvements in engine performance.
The rapid depletion of fossil fuel forced to search for substitute essential to replace the huge ... more The rapid depletion of fossil fuel forced to search for substitute essential to replace the huge demand of diesel required for all sectors. In the recent years, biodiesel is a proved substitute of diesel and its use at internal combustion engines has become a priority. Research is still going on to find better fuel at reasonable cost with need to reduce environmental pollution along the need. Particulate matter (PM) and NOx production was the results of improper combustion process and considered as the major constraints of a diesel engine. From the review it was found that, the use of biodiesel leads to the substantial reduction in PM, HC and CO emissions accompanying with the imperceptible power loss, the increase in fuel consumption and the increase in NOx emissions on conventional diesel engine with no or fewer modification. Related studies show that biodiesel fuel has a potential for reducing engine wear. Number of research and studies have been conducted on the DI diesel engine fuelled with biodiesel and its 20% blend with commercial diesel. However, high viscosity and low volatility being inherent properties of most of such biodiesel produced from plants (seeds), constraining their direct use in engines without any modifications. High viscosity interferes with fuel jet penetration, atomization and produces thick smoke in the exhaust. Diesel engines with biodiesel produce the same power output with reduced thermal efficiency and increased emissions hence its blend amount was limited to 20% with commercial diesel. This drawback can be overcome by implementing high pressure fuel injection system. Hence, this study is devoted to the performance and emissions evaluation of a diesel engine, when fueled with biodiesel fuel blends under high pressure fuel injection implementation.
Diesel engines combustion quality is based on the formation of fuel-air mixture. Enormous efforts... more Diesel engines combustion quality is based on the formation of fuel-air mixture. Enormous efforts have made to reduce the harmful diesel engine emissions. High engine noise, Particulate matter (PM) and NOx production are the results of improper combustion process and considered as the major constraints. The performance and emission characteristics of diesel engines depend on many parameters. Precise control over the fuel injection process is one of the most important factors and plays a very important role in combustion to increase the engine performance with minimal exhaust emission. The injection system must satisfy high pressure capability, injection pressure control, flexible timing control, and injection rate control. The purpose of this study is to find the performance and exhaust emission of diesel engines by implementing high injection pressure. Present paper is more concentrated on the optimization of high pressure injection to reduce particulate matter (PM), NOx and fuel consumption with increased engine power.
The present paper describes the performance of a petrol engine with variable compression ratio us... more The present paper describes the performance of a petrol engine with variable compression ratio using ethanol blend as fuel. A study of the effect of compression ratio on the performance is carried out on a 4-stroke spark ignition engine with 5%, 10%, 15% and 20% ethanol blend with petrol, for compression ratios 5:1, 6:1, 7:1 and 8:1. The experiment is carried out at a constant speed of 2000rpm for various loads of 25%, 50%, 75% and full load. Among the performance parameters, attention was concentrated on mechanical efficiency, volumetric efficiency and brake specific fuel consumption. The mechanical efficiency and volumetric efficiency of the engine is found to be higher at 15% ethanol blend for all compression ratios and is higher for compression ratio of 8:1 compared to other compression ratios. The specific fuel consumption of the engine is found to be lowest for 15% ethanol blend for all compression ratios and is found to be lowest for a compression ratio of 8:1.
Diesel Engines Are The Primary Source Of Power
For Heavy Duty Vehicles; Diesel Engines Have Bette... more Diesel Engines Are The Primary Source Of Power For Heavy Duty Vehicles; Diesel Engines Have Better Fuel Economy Than Equivalent Gasoline Engines And Produce Less Green House Gas Emission. On The Other Hand, Formation Of Smoke Due To Diffusion Combustion And Emission Of Oxides Of Nitrogen Released Due To High Combustion Temperatures Are The Major Limitations Of The Existing Diesel Engine Designs. Diesel Engine Manufacturers Have To Address These Most Critical Situations To Meet The Future Emissions Regulations Whilst Improving Performance And Fuel Economy At A Minimal Cost. The Fuel Economy, Increased Dynamic Response And Strict Exhaust Emission Regulations Resulted In Invention Of New Technology Development Required Improving The Diesel Engine Performance Along With Exhaust Emissions Reduction. These Improvements Are Made Possible With New Fueling Technologies By Improvements In Combustion Process Through Increased Injection Pressure. High Pressure Fuel Injection Results In Better Fuel Atomisation And Improves The Fuel/Air Mixing To Promote Complete Combustion, Thereby Increasing The Fuel Efficiency With Emission Control. The Objective Of This Paper Is To Investigate The Effect Of Fuel Injection Pressure On Performance, Fuel Consumption And Emission Of A Diesel Engine. A Study Was Done On A Single Cylinder 4 Stroke Direct Injection Diesel Engine And The Performance And Emission Characteristics Were Presented Graphically. Based On Experimental Results, The Best Performance Was Found At 220 Bar Fuel Injection Pressure.
The rapid depletion of fossil fuel forced to search for substitute essential to replace the huge ... more The rapid depletion of fossil fuel forced to search for substitute essential to replace the huge demand of diesel required for all sectors. In the recent years, biodiesel is a proved substitute of diesel and its use at internal combustion engines has become a priority. Research is still going on to find better fuel at reasonable cost with need to reduce environmental pollution along the need. Particulate matter (PM) and NOx production was the results of improper combustion process and considered as the major constraints of a diesel engine. From the review it was found that, the use of biodiesel leads to the substantial reduction in PM, HC and CO emissions accompanying with the imperceptible power loss, the increase in fuel consumption and the increase in NOx emissions on conventional diesel engine with no or fewer modification. Related studies show that biodiesel fuel has a potential for reducing engine wear. Number of research and studies have been conducted on the DI diesel engine fuelled with biodiesel and its 20% blend with commercial diesel. However, high viscosity and low volatility being inherent properties of most of such biodiesel produced from plants (seeds), constraining their direct use in engines without any modifications. High viscosity interferes with fuel jet penetration, atomization and produces thick smoke in the exhaust. Diesel engines with biodiesel produce the same power output with reduced thermal efficiency and increased emissions hence its blend amount was limited to 20% with commercial diesel. This drawback can be overcome by implementing high pressure fuel injection system. Hence, this study is devoted to the performance and emissions evaluation of a diesel engine, when fueled with biodiesel fuel blends under high pressure fuel injection implementation.
International Journal of Automotive and Mechanical Engineering, Dec 24, 2018
This paper presents an experimental investigation carried out on a "single cylinder diesel engine... more This paper presents an experimental investigation carried out on a "single cylinder diesel engine upgraded with a common rail direct injection (CRDI) system. Tests were conducted by fuelling high-speed diesel (HSD) and Simarouba biodiesel (SOME) blends to study the influence of injection pressure (IPR) and injection timing (ITG) on the performance and emissions. Four unique IPR of 400 bar, 600 bar, 800 bar and 1000 bar with four different ITG of 10°, 13°, 15° and 18° before top dead center (bTDC) combinations were taken for study with the engine loading varied from 25% to full load. Critical performance parameter like brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) were calculated, while, the primary emission parameters of the diesel engine, the NOx and smoke opacity were recorded. From the results it is concluded that the given engine recorded favourable results at IPR-ITG combination of 800 bar and 13° bTDC for all fuels tested at higher load conditions specifically at 75% load to full load. Among the different fuels investigated SOME30 yielded the best performance and moderate emission at this combination of IPR-ITG.
Indian journal of science and technology, Dec 20, 2016
This paper discusses the combined impact of high injection pressure and injection timings on the ... more This paper discusses the combined impact of high injection pressure and injection timings on the performance and combustion characteristics of a diesel engine using biodiesel ester of Simarouba oil (SOME) blends. A Kirloskar make single cylinder 3.7 kW (5 HP) capacity diesel engine was modified to operate with Common Rail Direct Injection (CRDI) system. Experiments were carried on this engine with CRDI setup, fueled with diesel and SOME biodiesel to optimize the combined Injection Pressure (IP) and Injection Timing (IT). A combination of three different IP of 600 bar, 800 bar, 1000 bar and four different injection timings (IT) of 10°, 18°, 23°, 28° before Top Dead Centre (bTDC) were tested at a constant Compression Ratio (CR) of 16.5, engine speed of 1500 rpm by varying load from 25% to 100% of full load. Maximum Brake Thermal Efficiency (BTE) was recorded at IP of 800 bar and IT of 18°bTDC CA combination for HSD, SOME 20 and SOME 30. Peak pressure and Heat Release Rates (HRR) were studied for IT of 23°bTDC and found maximum values with IP 800 bar for neat diesel (HSD). The findings of this study encourage and emphasize the probability of admitting the higher percentage biodiesel blends with HSD by the make use of a proper combination of high fuel injection pressure and injection timing. Hence it serves to overcome the depletion of neat diesel and its environmental issues.
This paper presents an experimental investigation carried out on a “single cylinder diesel engine... more This paper presents an experimental investigation carried out on a “single cylinder diesel engine upgraded with a common rail direct injection (CRDI) system. Tests were conducted by fuelling high-speed diesel (HSD) and Simarouba biodiesel (SOME) blends to study the influence of injection pressure (IPR) and injection timing (ITG) on the performance and emissions. Four unique IPR of 400 bar, 600 bar, 800 bar and 1000 bar with four different ITG of 10°, 13°, 15° and 18° before top dead center (bTDC) combinations were taken for study with the engine loading varied from 25% to full load. Critical performance parameter like brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) were calculated, while, the primary emission parameters of the diesel engine, the NOx and smoke opacity were recorded. From the results it is concluded that the given engine recorded favourable results at IPRITG combination of 800 bar and 13° bTDC for all fuels tested at higher load conditions sp...
International Journal of Automotive and Mechanical Engineering, 2018
A single cylinder diesel engine upgraded to operate Common Rail Direct Injection (CRDI) system an... more A single cylinder diesel engine upgraded to operate Common Rail Direct Injection (CRDI) system and employed in this investigation. Tests were conducted on this engine using High-Speed diesel (HSD) and Simarouba biodiesel (SOME) blends to determine the influence of Injection Pressure (IP) and Injection Timing (IT) on the performance and emissions. Four unique IP of 400 bar to 1000 bar, in steps of 200 bar and four differing ITs of 10°, 13°, 15° and 18° before Top Dead Center (bTDC) combinations were attempted for the 25% to full load. Compression Ratio (CR) of 16.5 and Engine speed of 1500 RPM was kept constant during all trails. Critical performance parameter like Brake Thermal Efficiency (BTE) and Brake Specific Fuel Consumption (BSFC) were analyzed, primary emission parameters of the diesel engine The NOx and Smoke opacity were recorded. Finally, the outcomes of each combination were discussed.
This paper discusses the combined impact of high injection pressure and injection timings on the ... more This paper discusses the combined impact of high injection pressure and injection timings on the performance and combustion characteristics of a diesel engine using biodiesel ester of Simarouba oil (SOME) blends. A Kirloskar make single cylinder 3.7 kW (5 HP) capacity diesel engine was modified to operate with Common Rail Direct Injection (CRDI) system. Experiments were carried on this engine with CRDI setup, fueled with diesel and SOME biodiesel to optimize the combined Injection Pressure (IP) and Injection Timing (IT). A combination of three different IP of 600 bar, 800 bar, 1000 bar and four different injection timings (IT) of 10°, 18°, 23°, 28° before Top Dead Centre (bTDC) were tested at a constant Compression Ratio (CR) of 16.5, engine speed of 1500 rpm by varying load from 25% to 100% of full load. Maximum Brake Thermal Efficiency (BTE) was recorded at IP of 800 bar and IT of 18°bTDC CA combination for HSD, SOME 20 and SOME 30. Peak pressure and Heat Release Rates (HRR) were studied for IT of 23°bTDC and found maximum values with IP 800 bar for neat diesel (HSD). The findings of this study encourage and emphasize the probability of admitting the higher percentage biodiesel blends with HSD by the make use of a proper combination of high fuel injection pressure and injection timing. Hence it serves to overcome the depletion of neat diesel and its environmental issues.
International Journal on Applied Bio-Engineering, 2014
Diesel engines are the primary source of power for heavy duty vehicles; diesel engines have bette... more Diesel engines are the primary source of power for heavy duty vehicles; diesel engines have better fuel economy than equivalent gasoline engines and produce less green house gas emission. On the other hand, formation of smoke due to diffusion combustion and emission of oxides of nitrogen released due to high combustion temperatures are the major limitations of the existing diesel engine designs. Diesel engine manufacturers have to address these most critical situations to meet the future emissions regulations whilst improving performance and fuel economy at a minimal cost. The fuel economy, increased dynamic response and strict exhaust emission regulations resulted in invention of new technology development required improving the diesel engine performance along with exhaust emissions reduction. These improvements are made possible with new fueling technologies by improvements in combustion process through increased injection pressure. High pressure fuel injection results in better fuel atomisation and improves the fuel/air mixing to promote complete combustion, thereby increasing the fuel efficiency with emission control. The objective of this paper is to investigate the effect of fuel injection pressure on performance, fuel consumption and emission of a diesel engine. A study was done on a single cylinder 4 stroke direct injection diesel engine and the performance and emission characteristics were presented graphically. Based on experimental results, the best performance was found at 220 bar fuel injection pressure.
International Journal of Latest Research in Science and Technology
Diesel engine combustion quality is based on the formation of fuel-air mixture. Enormous efforts ... more Diesel engine combustion quality is based on the formation of fuel-air mixture. Enormous efforts have made to reduce the harmful diesel engine emissions. High engine noise, Particulate matter (PM) and NOx production are the results of improper combustion process and considered as the major constraints. The performance and emission characteristics of diesel engines depend on many parameters. Precise control over the fuel injection process is one of the most important factors and plays a very important role in combustion to increase the engine performance with minimal exhaust emission. The injection system must satisfy high pressure capability, injection pressure control, flexible timing control, and injection rate control. The purpose of this study is to find the performance and exhaust emission of diesel engines by implementing the combination of various high injection pressures and variable injection timings. Present paper is concentrated towords optimization of the best combinatio...
Diesel engines provide high fuel efficiency hence widely used on heavy duty transport application... more Diesel engines provide high fuel efficiency hence widely used on heavy duty transport applications. Diesel engines even have reduction in CO2 emission, which is believed to be the main cause for global warming. The main disadvantage of diesel engine is it emits nitrogen oxides (NOX) and particulate matter (PM), which are considered as the main toxic gases. These emissions are therefore limited by the environment regulating authorities in almost all the countries. A best way to reduce the nitrogen oxide emissions of a diesel engine is the use of exhaust gas recirculation (EGR). EGR is a device which recirculates a portion of an engine's exhaust gas back into the combustion chamber. NOx is produced when a mixture of nitrogen and oxygen is subjected to high temperature in the combustion chamber. This can be reduced by using EGR which helps in maintaining the lower combustion chamber temperatures and reduces peak combustion temperature, which in turn reduces the formation of NOX. The aim of the present paper intends the study on performance and emission rates of a diesel engine equipped with EGR system and to find the EGR system importance in the reduction of NOx as well as particulate matter (PM) emissions with improvements in engine performance.
The rapid depletion of fossil fuel forced to search for substitute essential to replace the huge ... more The rapid depletion of fossil fuel forced to search for substitute essential to replace the huge demand of diesel required for all sectors. In the recent years, biodiesel is a proved substitute of diesel and its use at internal combustion engines has become a priority. Research is still going on to find better fuel at reasonable cost with need to reduce environmental pollution along the need. Particulate matter (PM) and NOx production was the results of improper combustion process and considered as the major constraints of a diesel engine. From the review it was found that, the use of biodiesel leads to the substantial reduction in PM, HC and CO emissions accompanying with the imperceptible power loss, the increase in fuel consumption and the increase in NOx emissions on conventional diesel engine with no or fewer modification. Related studies show that biodiesel fuel has a potential for reducing engine wear. Number of research and studies have been conducted on the DI diesel engine fuelled with biodiesel and its 20% blend with commercial diesel. However, high viscosity and low volatility being inherent properties of most of such biodiesel produced from plants (seeds), constraining their direct use in engines without any modifications. High viscosity interferes with fuel jet penetration, atomization and produces thick smoke in the exhaust. Diesel engines with biodiesel produce the same power output with reduced thermal efficiency and increased emissions hence its blend amount was limited to 20% with commercial diesel. This drawback can be overcome by implementing high pressure fuel injection system. Hence, this study is devoted to the performance and emissions evaluation of a diesel engine, when fueled with biodiesel fuel blends under high pressure fuel injection implementation.
Diesel engines combustion quality is based on the formation of fuel-air mixture. Enormous efforts... more Diesel engines combustion quality is based on the formation of fuel-air mixture. Enormous efforts have made to reduce the harmful diesel engine emissions. High engine noise, Particulate matter (PM) and NOx production are the results of improper combustion process and considered as the major constraints. The performance and emission characteristics of diesel engines depend on many parameters. Precise control over the fuel injection process is one of the most important factors and plays a very important role in combustion to increase the engine performance with minimal exhaust emission. The injection system must satisfy high pressure capability, injection pressure control, flexible timing control, and injection rate control. The purpose of this study is to find the performance and exhaust emission of diesel engines by implementing high injection pressure. Present paper is more concentrated on the optimization of high pressure injection to reduce particulate matter (PM), NOx and fuel consumption with increased engine power.
The present paper describes the performance of a petrol engine with variable compression ratio us... more The present paper describes the performance of a petrol engine with variable compression ratio using ethanol blend as fuel. A study of the effect of compression ratio on the performance is carried out on a 4-stroke spark ignition engine with 5%, 10%, 15% and 20% ethanol blend with petrol, for compression ratios 5:1, 6:1, 7:1 and 8:1. The experiment is carried out at a constant speed of 2000rpm for various loads of 25%, 50%, 75% and full load. Among the performance parameters, attention was concentrated on mechanical efficiency, volumetric efficiency and brake specific fuel consumption. The mechanical efficiency and volumetric efficiency of the engine is found to be higher at 15% ethanol blend for all compression ratios and is higher for compression ratio of 8:1 compared to other compression ratios. The specific fuel consumption of the engine is found to be lowest for 15% ethanol blend for all compression ratios and is found to be lowest for a compression ratio of 8:1.
Diesel Engines Are The Primary Source Of Power
For Heavy Duty Vehicles; Diesel Engines Have Bette... more Diesel Engines Are The Primary Source Of Power For Heavy Duty Vehicles; Diesel Engines Have Better Fuel Economy Than Equivalent Gasoline Engines And Produce Less Green House Gas Emission. On The Other Hand, Formation Of Smoke Due To Diffusion Combustion And Emission Of Oxides Of Nitrogen Released Due To High Combustion Temperatures Are The Major Limitations Of The Existing Diesel Engine Designs. Diesel Engine Manufacturers Have To Address These Most Critical Situations To Meet The Future Emissions Regulations Whilst Improving Performance And Fuel Economy At A Minimal Cost. The Fuel Economy, Increased Dynamic Response And Strict Exhaust Emission Regulations Resulted In Invention Of New Technology Development Required Improving The Diesel Engine Performance Along With Exhaust Emissions Reduction. These Improvements Are Made Possible With New Fueling Technologies By Improvements In Combustion Process Through Increased Injection Pressure. High Pressure Fuel Injection Results In Better Fuel Atomisation And Improves The Fuel/Air Mixing To Promote Complete Combustion, Thereby Increasing The Fuel Efficiency With Emission Control. The Objective Of This Paper Is To Investigate The Effect Of Fuel Injection Pressure On Performance, Fuel Consumption And Emission Of A Diesel Engine. A Study Was Done On A Single Cylinder 4 Stroke Direct Injection Diesel Engine And The Performance And Emission Characteristics Were Presented Graphically. Based On Experimental Results, The Best Performance Was Found At 220 Bar Fuel Injection Pressure.
The rapid depletion of fossil fuel forced to search for substitute essential to replace the huge ... more The rapid depletion of fossil fuel forced to search for substitute essential to replace the huge demand of diesel required for all sectors. In the recent years, biodiesel is a proved substitute of diesel and its use at internal combustion engines has become a priority. Research is still going on to find better fuel at reasonable cost with need to reduce environmental pollution along the need. Particulate matter (PM) and NOx production was the results of improper combustion process and considered as the major constraints of a diesel engine. From the review it was found that, the use of biodiesel leads to the substantial reduction in PM, HC and CO emissions accompanying with the imperceptible power loss, the increase in fuel consumption and the increase in NOx emissions on conventional diesel engine with no or fewer modification. Related studies show that biodiesel fuel has a potential for reducing engine wear. Number of research and studies have been conducted on the DI diesel engine fuelled with biodiesel and its 20% blend with commercial diesel. However, high viscosity and low volatility being inherent properties of most of such biodiesel produced from plants (seeds), constraining their direct use in engines without any modifications. High viscosity interferes with fuel jet penetration, atomization and produces thick smoke in the exhaust. Diesel engines with biodiesel produce the same power output with reduced thermal efficiency and increased emissions hence its blend amount was limited to 20% with commercial diesel. This drawback can be overcome by implementing high pressure fuel injection system. Hence, this study is devoted to the performance and emissions evaluation of a diesel engine, when fueled with biodiesel fuel blends under high pressure fuel injection implementation.
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Papers by srinath pai
For Heavy Duty Vehicles; Diesel Engines Have Better Fuel
Economy Than Equivalent Gasoline Engines And Produce
Less Green House Gas Emission. On The Other Hand,
Formation Of Smoke Due To Diffusion Combustion And
Emission Of Oxides Of Nitrogen Released Due To High
Combustion Temperatures Are The Major Limitations Of
The Existing Diesel Engine Designs. Diesel Engine
Manufacturers Have To Address These Most Critical
Situations To Meet The Future Emissions Regulations Whilst
Improving Performance And Fuel Economy At A Minimal
Cost. The Fuel Economy, Increased Dynamic Response And
Strict Exhaust Emission Regulations Resulted In Invention Of
New Technology Development Required Improving The
Diesel Engine Performance Along With Exhaust Emissions
Reduction. These Improvements Are Made Possible With
New Fueling Technologies By Improvements In Combustion
Process Through Increased Injection Pressure. High Pressure
Fuel Injection Results In Better Fuel Atomisation And
Improves The Fuel/Air Mixing To Promote Complete
Combustion, Thereby Increasing The Fuel Efficiency With
Emission Control. The Objective Of This Paper Is To
Investigate The Effect Of Fuel Injection Pressure On
Performance, Fuel Consumption And Emission Of A Diesel
Engine. A Study Was Done On A Single Cylinder 4 Stroke
Direct Injection Diesel Engine And The Performance And
Emission Characteristics Were Presented Graphically. Based
On Experimental Results, The Best Performance Was Found
At 220 Bar Fuel Injection Pressure.
For Heavy Duty Vehicles; Diesel Engines Have Better Fuel
Economy Than Equivalent Gasoline Engines And Produce
Less Green House Gas Emission. On The Other Hand,
Formation Of Smoke Due To Diffusion Combustion And
Emission Of Oxides Of Nitrogen Released Due To High
Combustion Temperatures Are The Major Limitations Of
The Existing Diesel Engine Designs. Diesel Engine
Manufacturers Have To Address These Most Critical
Situations To Meet The Future Emissions Regulations Whilst
Improving Performance And Fuel Economy At A Minimal
Cost. The Fuel Economy, Increased Dynamic Response And
Strict Exhaust Emission Regulations Resulted In Invention Of
New Technology Development Required Improving The
Diesel Engine Performance Along With Exhaust Emissions
Reduction. These Improvements Are Made Possible With
New Fueling Technologies By Improvements In Combustion
Process Through Increased Injection Pressure. High Pressure
Fuel Injection Results In Better Fuel Atomisation And
Improves The Fuel/Air Mixing To Promote Complete
Combustion, Thereby Increasing The Fuel Efficiency With
Emission Control. The Objective Of This Paper Is To
Investigate The Effect Of Fuel Injection Pressure On
Performance, Fuel Consumption And Emission Of A Diesel
Engine. A Study Was Done On A Single Cylinder 4 Stroke
Direct Injection Diesel Engine And The Performance And
Emission Characteristics Were Presented Graphically. Based
On Experimental Results, The Best Performance Was Found
At 220 Bar Fuel Injection Pressure.