Effect of Injection Pressure on Emission Performance of Bio-diesel and its Blends

Basavaraja, T.; Reddy, M. R. P.; Swamy, V.T.

doi:10.4271/2005-26-030

Cited by 8 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The primary problems associated with using straight these oils as alternative fuel in compression ignition (CI) engines are caused by very high fuel viscosity and low volatility (Basavaraja et al, 2005). The high viscosity of non-edible vegetable oils can be reduced by several techniques which include dilution, microemulsion, pyrolysis, and transesterification.…”

Section: Derivatives Of Non-edible Oils As Diesel Fuelsmentioning

confidence: 99%

Biodiesel production from non-edible plant oils

Demırbas

Bafail

Ahmad

et al. 2016

Energy Exploration & Exploitation

256

126

View full text Add to dashboard Cite

Biodiesel is an alternative to petroleum-based fuels derived from a variety of feedstocks, including vegetable oils, animal fats, and waste cooking oil. At present, biodiesel is mainly produced from conventionally grown edible oils such as soybean, rapeseed, sunflower, and palm. The cost of biodiesel is the main obstacle to commercialization of the product. Biodiesel produced from edible oils is currently not economically feasible. On the other hand, extensive use of edible oils for biodiesel production may lead to food crisis. These problems can be solved by using lowcost feedstocks such as non-edible oils and waste cooking oils for biodiesel production. This paper reviews numerous options of non-edible oils as the substantial feedstocks, biodiesel processing, and effect of different parameters on production of biodiesel.

show abstract

Section: Derivatives Of Non-edible Oils As Diesel Fuelsmentioning

confidence: 99%

Biodiesel production from non-edible plant oils

Demırbas

Bafail

Ahmad

et al. 2016

Energy Exploration & Exploitation

256

126

View full text Add to dashboard Cite

show abstract

“…These "inputs" to the combustion process affect the "outputs", namely of emissions, efficiency, and power. Research has shown that it may be possible to mitigate the negative aspects of biodiesel (namely higher NO x and reduced fuel economy) by active modulation of engine "actuators", such as injection timing [13], [11], amount of exhaust gas recirculation (EGR) [2], and fuel injection pressure [4]. These parameters can be controlled on modern diesel engines through the engine control module (ECM).…”

Section: B Motivationmentioning

confidence: 99%

Steady-State biodiesel blend estimation via a wideband oxygen sensor

Snyder

Washington

Indrajuana

et al. 2008

2008 American Control Conference

View full text Add to dashboard Cite

A substantial opportunity exists to reduce carbon dioxide (CO2) emissions as well as dependence on foreign oil by developing strategies to cleanly and efficiently use biodiesel, a renewable, domestically available, alternative diesel fuel. However, biodiesel utilization presents several challenges, including decreased fuel energy density and increased emissions of smog-generating nitrogen oxides (NOx). These negative aspects can likely be mitigated via closed-loop combustion control provided the properties of the fuel blend can be estimated accurately, on-vehicle, in real-time. To this end, this paper presents a method to practically estimate the biodiesel content of fuel being used in a diesel engine during steady-state operation. The simple, generalizable, physically motivated estimation strategy presented utilizes information from a wideband oxygen sensor in the engine's exhaust stream, coupled with knowledge of the air-fuel ratio, to estimate the biodiesel content of the fuel. Experimental validation was performed on a 2007 Cummins 6.7 liter ISB series engine. Four fuel blends (0%, 20%, 50% and 100% biodiesel) were tested at a wide variety of torque-speed conditions. The estimation strategy correctly estimated the biodiesel content of the four fuel blends to within 4.2% of the true biodiesel content. Blends of 0%, 20%, 50% and 100% were estimated to be 2.5%, 17.1%, 54.2%, and 96.8% respectively. The results indicate that the estimation strategy presented is capable of accurately estimating the biodiesel content in a diesel engine during steady-state engine operation. This method offers a practical alternative to in-the-fuel type sensors, because wideband oxygen sensors are already in widespread production and are in place on some modern diesel vehicles today.

show abstract

“…Substantial mitigation or elimination of the negative performance- and combustion-related effects of biodiesel is a key step to making biodiesel a viable alternative/supplemental transportation fuel. Prior efforts have indicated that higher biodiesel fuel consumption and biodiesel−NO x emissions can be mitigated to some extent via modulation of the following four engine parameters, alone or in concert: air/fuel ratio (AFR), EGR fraction, , fuel injection pressure, , and start of injection (SOI) timing. − Simultaneous modulation of fuel injection pressure and timing was considered in ref , while ref also incorporated EGR fraction optimization. Many of these efforts were based on experiments performed at a single operating location using single-cylinder engines with mechanical fuel injection or were based solely on combustion model results.…”

Section: Introductionmentioning

confidence: 99%

Stock and Optimized Performance and Emissions with 5 and 20% Soy Biodiesel Blends in a Modern Common Rail Turbo-Diesel Engine

et al. 2009

View full text Add to dashboard Cite

Stock engine design and decision making target optimal performance with conventional diesel fuel, leading to suboptimal results for biodiesel. The main result of this study is the determination of the appropriate engine decision making for the air/fuel ratio (AFR), exhaust gas recirculation (EGR) fraction, injection (rail) pressure, and start of main fuel injection (SOI) in a modern common rail diesel engine using variablegeometry turbo charging and operating with 5% (B5) and 20% (B20) soy-based biodiesel fuel mixtures to minimize brake-specific fuel consumption (BSFC) while adhering to strict combustion noise, NO x and PM emission constraints. In so doing, this effort determined to what extent the optimal AFR, EGR fraction, rail pressure, and SOI settings can (1) overcome the well-known "biodiesel-NO x effect" and (2) mitigate the impact of lower biodiesel energy density on BSFC for B5 and B20 biodiesel blends. Study findings indicate that lower AFR, higher EGR fraction, and earlier start of main injection can completely eliminate biodiesel NO x increases with blends of soy-based biodiesel in a modern diesel engine. While the BSNO x reductions were achieved with acceptable BSPM and noise, it was not possible to reduce the BSFC for B5 and B20 to conventional diesel levels.

show abstract

Effect of Injection Pressure on Emission Performance of Bio-diesel and its Blends

Cited by 8 publications

References 11 publications

Biodiesel production from non-edible plant oils

Biodiesel production from non-edible plant oils

Steady-State biodiesel blend estimation via a wideband oxygen sensor

Stock and Optimized Performance and Emissions with 5 and 20% Soy Biodiesel Blends in a Modern Common Rail Turbo-Diesel Engine

Contact Info

Product

Resources

About