Showing papers on "Diesel engine published in 2011"
TL;DR: In this article, a fuel reactivity controlled compression ignition (RCCI) concept is demonstrated as a promising method to achieve high efficiency, which is demonstrated in a heavy-duty test engine over a range of loads.
Abstract: A fuel reactivity controlled compression ignition (RCCI) concept is demonstrated as a promising method to achieve high efficiency – clean combustion. Engine experiments were performed in a heavy-duty test engine over a range of loads. Additionally, RCCI engine experiments were compared to conventional diesel engine experiments. Detailed computational fluid dynamics modelling was then used to explain the experimentally observed trends. Specifically, it was found that RCCI combustion is capable of operating over a wide range of engine loads with near zero levels of NOx and soot, acceptable pressure rise rate and ringing intensity, and very high indicated efficiency. For example, a peak gross indicated efficiency of 56 per cent was observed at 9.3 bar indicated mean effective pressure and 1300 rev/min. The comparison between RCCI and conventional diesel showed a reduction in NOx by three orders of magnitude, a reduction in soot by a factor of six, and an increase in gross indicated efficiency of 16.4 per cen...
707 citations
TL;DR: The use of inedible vegetable oils as an alternative fuel for diesel engine is accelerated by the energy crisis due to depletion of resources and increased environmental problems including the great need for edible oil as food and the reduction of biodiesel production cost, etc as discussed by the authors.
Abstract: The use of inedible vegetable oils as an alternative fuel for diesel engine is accelerated by the energy crisis due to depletion of resources and increased environmental problems including the great need for edible oil as food and the reduction of biodiesel production cost, etc. Of a lot of inedible vegetable oils which can be exploited for substitute fuel as diesel fuel, seven vegetable oils, i.e., jatropha, karanja, mahua, linseed, rubber seed, cottonseed and neem oils were selected for discussion in this review paper. The application of jatropha oil as a liquid fuel for CI engine can be classified with neat jatropha oil, engine modifications such as preheating, and dual fuelling, and fuel modifications such as jatropha oil blends with other fuels, mostly with diesel fuel, biodiesel, biodiesel blends and degumming. Therefore, jatropha oil is a leading candidate for the commercialization of non-edible vegetable oils. There exists a big difference in the fuel properties of seven inedible vegetable oils and its biodiesels considered in this review. It is clear from this review that biodiesel generally causes an increase in NOx emission and a decrease in HC, CO and PM emissions compared to diesel. It was reported that a diesel engine without any modification would run successfully on a blend of 20% vegetable oil and 80% diesel fuel without damage to engine parts. This trend can be applied to the biodiesel blends even though particular biodiesel shows 40% blend. In addition, the blends of biodiesel and diesel can replace the diesel fuel up to 10% by volume for running common rail direct injection system without any durability problems.
416 citations
TL;DR: In this article, the authors have collected and analyzed the data on both advantages and disadvantages of biodiesel over conventional diesel, and the highest consensus is related to enhanced corrosion of automotive parts due to its compositional differences.
Abstract: Biodiesel, derived from the transesterification of vegetable oils or animal fats, is composed of saturated and unsaturated long-chain fatty acid alkyl esters. In spite of having some application problems, recently it is being considered as one of the most promising alternative fuels in internal combustion engine. From scientific literatures, this paper has collected and analyzed the data on both advantages and disadvantages of biodiesel over conventional diesel. Since the aim of this study is to evaluate the biodiesel feasibility in automobiles, the first section is dedicated to materials compatibility in biodiesel as compared to that in diesel. The highest consensus is related to enhanced corrosion of automotive parts due to its compositional differences. In the subsequent sections, data on performance, emission and engine durability have been analyzed and compared. In this case, the highest consensus is found in reducing emissions as well as in increasing moving parts sticking, injector coking and filter plugging. This paper has also summarized the factors of biodiesel in contributing these technical performances.
412 citations
TL;DR: In this paper, the influence of n -butanol/diesel fuel blends (as an oxygenation additive for the diesel fuel) on engine performance and exhaust emissions in a small diesel engine was evaluated.
411 citations
TL;DR: In this article, the authors investigated the combustion and emissions characteristics of a compression-ignition engine using a dual-fuel approach with ammonia and diesel fuel, and the results indicated that exhaust ammonia emissions ranged from 1000 to 3000 PmV and further aftertreatment will be required due to health concerns.
357 citations
TL;DR: In this article, the use of ferric chloride (FeCl 3 ) as a fuel borne catalyst (FBC) for waste cooking palm oil based biodiesel was investigated, and the results revealed that the FBC added biodiesel resulted in a decreased brake specific fuel consumption (BSFC) of 86% while the brake thermal efficiency increased by 63%.
353 citations
TL;DR: In this paper, the authors investigated the feasibility of using high percentage of ethanol in diesel-ethanol blends, with biodiesel as a co-solvent and properties enhancer.
349 citations
TL;DR: In this article, Euro V diesel fuel, biodiesel, and ethanol-biodiesel blends (BE) were tested in a 4-cylinder direct-injection diesel engine to investigate the combustion, performance and emission characteristics of the engine under five engine loads at the maximum torque engine speed of 1800rpm.
337 citations
TL;DR: In this article, the effect of exhaust gas recirculation (EGR) on soot deposits, and wear of vital engine parts, especially piston rings, apart from performance and emissions in a two cylinder, air cooled, constant speed direct injection diesel engine, which is typically used in agricultural farm machinery and decentralized power generation.
330 citations
TL;DR: A deterministic algorithm makes use of a list of commercially available system devices to suggest the optimal number and type of units ensuring that the total cost of the system is minimized while guaranteeing the availability of the energy.
325 citations
TL;DR: In this article, an experimental investigation was performed to study the influence of dual-fuel combustion characteristics on the exhaust emissions and combustion performance in a diesel engine fueled with biogas-biodiesel dual fuel.
TL;DR: In this paper, an experimental study was conducted to evaluate the effects of using blends of diesel fuel with either ethanol in proportions of 5% and 10% or n -butanol in 8% and 16% (by vol.), on the combustion behavior of a fully-instrumented, six-cylinder, turbocharged and after-cooled, heavy duty, direct injection (DI), ‘Mercedes-Benz’ engine installed at the laboratory.
13 May 2011
TL;DR: In this paper, a mean-value model of a diesel engine with a variable-geometry turbocharger (VGT) and exhaust gas recirculation (EGR) is developed, parameterized and validated.
Abstract: A mean-value model of a diesel engine with a variable-geometry turbocharger (VGT) and exhaust gas recirculation (EGR) is developed, parameterized, and validated. The intended model applications are ...
TL;DR: In this paper, the effects of using diethyl ether and ethanol as additive to biodiesel/diesel blends on the performance, emissions and combustion characteristics of a direct injection diesel engine were evaluated.
TL;DR: In this paper, the performance, combustion and injection characteristics of a direct injection diesel engine have been investigated experimentally when it was fueled with canola oil methyl ester (COME) and waste (frying) palm oil methyl Ester (WPOME) in order to determine the performance and combustion characteristics.
TL;DR: In this article, the effects of water-diesel emulsion and water injection into the intake manifold on performance, combustion and emission characteristics of a DI diesel engine under similar operating conditions were compared.
TL;DR: In this paper, the effects of design and operating parameters on HCCI diesel emissions, particularly NO x and soot, are investigated in conjunction with comparative evaluation of studies reported in the specialised literature.
TL;DR: In this paper, the effect of antioxidant additives on NOx emissions in a jatropha methyl ester fuelled direct injection diesel engine have been investigated experimentally and compared with conventional diesel fuel.
TL;DR: In this paper, a single-cylinder, direct injection compression ignition was used to achieve the conditions for biodiesel usage in a single cylinder, Direct Injection Compression Ignition (DIOC) engine.
TL;DR: In this paper, a turbocharged, direct injection, multi-cylinder truck diesel engine fitted with a mechanical distributor type fuel injection pump using biodiesel-methanol blend and neat karanji oil derived biodiesel under constant speed and varying load conditions without altering injection timings.
Abstract: The increased focus on alternative fuels research in the recent years are mainly driven by escalating crude oil prices, stringent emission norms and the concern on clean environment. The processed form of vegetable oil (biodiesel) has emerged as a potential substitute for diesel fuel on account of its renewable source and lesser emissions. The experimental work reported here has been carried out on a turbocharged, direct injection, multi-cylinder truck diesel engine fitted with mechanical distributor type fuel injection pump using biodiesel-methanol blend and neat karanji oil derived biodiesel under constant speed and varying load conditions without altering injection timings. The results of the experimental investigation indicate that the ignition delay for biodiesel-methanol blend is slightly higher as compared to neat biodiesel and the maximum increase is limited to 1 deg. CA. The maximum rate of pressure rise follow a trend of the ignition delay variations at these operating conditions. However, the peak cylinder pressure and peak energy release rate decreases for biodiesel-methanol blend. In general, a delayed start of combustion and lower combustion duration are observed for biodiesel-methanol blend compared to neat biodiesel fuel. A maximum thermal efficiency increase of 4.2% due to 10% methanol addition in the biodiesel is seen at 80% load and 16.67 s−1 engine speed. The unburnt hydrocarbon and carbon monoxide emissions are slightly higher for the methanol blend compared to neat biodiesel at low load conditions whereas at higher load conditions unburnt hydrocarbon emissions are comparable for the two fuels and carbon monoxide emissions decrease significantly for the methanol blend. A significant reduction in nitric oxide and smoke emissions are observed with the biodiesel-methanol blend investigated.
TL;DR: In this article, the influence of compression ratio and injection parameters such as injection timing (IT) and injection pressure (IP) on the performance and emissions of a DI diesel engine using biodiesel (%5, 20, 50%, and 100%) blended-diesel fuel.
TL;DR: In this article, a 5.9-kW stationary diesel engine was converted into spark ignition mode and run on compressed natural gas (CNG), methane enriched biogas (Bio-CNG) and Biogas produced from biomethanation of jatropha and pongamia oil seed cakes.
TL;DR: In this paper, an experimental study was carried out to evaluate emission and performance characteristics of a multi-cylinder diesel engine operating on waste cooking oil such as 5% palm oil with 95% ordinary diesel fuel (P5) and 5% coconut oil (C5).
TL;DR: In this paper, experimental tests were conducted at the authors' laboratory on a bus/truck, turbocharged diesel engine in order to investigate the formation mechanisms of nitric oxide (NO), smoke, and combustion noise radiation during hot starting for various alternative fuel blends.
TL;DR: In this article, the properties of the oil derived from waste plastics were analyzed and found that it has properties similar to that of diesel, and the engine could operate with 100% waste plastic oil and can be used as fuel in diesel engines.
TL;DR: In this paper, the influence of injection timing on the performance and emissions of a single cylinder, four stroke stationary, variable compression ratio, diesel engine was studied using waste cooking oil (WCO) as the biodiesel blended with diesel.
TL;DR: With a range of surrogate measures, the use of a particle trap prevents several adverse cardiovascular effects of exhaust inhalation in men and widespread use of particle traps on diesel-powered vehicles may have substantial public health benefits and reduce the burden of cardiovascular disease.
Abstract: BACKGROUND: In controlled human exposure studies, diesel engine exhaust inhalation impairs vascular function and enhances thrombus formation. The aim of the present study was to establish whether a ...
TL;DR: In this paper, the authors provided a tangible pathway to prepare and to ameliorate the biodiesel emulsion fuel on incorporating potential alumina nanoparticles, and the whole investigation was carried out in a constant speed diesel engine.
Abstract: Biodiesel emulsions are considered as the propitious alternative fuels for diesel engines. The need of biodiesel emulsion fuels for the diesel engines is to curtail the dependency on the fossil fuels in context to the world energy oil crisis. Henceforth, the present study provides a tangible pathway to prepare and to ameliorate the biodiesel emulsion fuel on incorporating potential alumina nanoparticles. The biodiesel emulsion fuel is prepared by emulsification technique comprising of 83% of jatropha biodiesel, 15% of water, and 2% of surfactants (Span80 and Tween80) with the aid of a mechanical agitator. The prepared biodiesel emulsion fuel is mixed with the alumina nanoparticles in the mass fractions of say 25, 50, and 100 ppm with the help of an ultrasonicator. The whole investigation is carried out in a constant speed diesel engine in three phases using jatropha biodiesel, jatropha biodiesel emulsion fuel, and alumina nanoparticle blended jatropha biodiesel emulsion fuels. The experimental results rev...
TL;DR: An alternative fuel production was performed by pyrolysis of waste vehicle tires under nitrogen (N2) environment and with calcium hydroxide (Ca(OH)2) as catalyst.
TL;DR: In this article, the effects of blends containing croton mogalocarpus oil (CRO)-Butanol (BU) alcohol-diesel (D2) on engine performance, combustion, and emission characteristics were evaluated.