Combustion and emissions behavior for ethanol–gasoline blends in a single cylinder engine

Schifter, I.; Díaz, Luis A.; Rodríguez, R.; Gómez, José Luis Mudarra; González, U.

doi:10.1016/j.fuel.2011.01.034

Cited by 141 publications

(68 citation statements)

References 18 publications

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“…However, those changes were not statistically significant. This result agrees with our analytical results and those obtained by other authors [14][15][16]. Figure 6c,d show that EI CO is about two orders of magnitude higher for carbureted vehicles than for fuel-injected vehicles, when they reproduce the NEDC on a chassis dynamometer.…”

Section: Co Emission Indexsupporting

confidence: 92%

The Effect of Using Ethanol-Gasoline Blends on the Mechanical, Energy and Environmental Performance of In-Use Vehicles

et al. 2018

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Abstract:The use of ethanol in gasoline has become a worldwide tendency as an alternative to reduce net CO 2 emissions to the atmosphere, increasing gasoline octane rating and reducing dependence on petroleum products. However, recently environmental authorities in large urban centers have expressed their concerns on the true effect of using ethanol blends of up to 20% v/v in in-use vehicles without any modification in the setup of the engine control unit (ECU), and on the variations of these effects along the years of operation of these vehicles. Their main concern is the potential increase in the emissions of volatile organic compounds with high ozone formation potential. To address these concerns, we developed analytical and experimental work testing engines under steady-conditions. We also tested carbureted and fuel-injected vehicles every 10,000 km during their first 100,000 km of operation. We measured the effect of using ethanol-gasoline blends on the power and torque generated, the fuel consumption and CO 2 , CO, NOx and unburned hydrocarbon emissions, including volatile organic compounds (VOCs) such as acetaldehyde, formaldehyde, benzene and 1,3-butadiene which are considered important ozone precursors. The obtained results showed statistically no significant differences in these variables when vehicles operate with a blend of 20% v/v ethanol and 80% v/v gasoline (E20) instead of gasoline. Those results remained unchanged during the first 100,000 km of operation of the vehicles. We also observed that when the vehicles operated with E20 at high engine loads, they showed a tendency to operate with greater values of λ (ratio of the actual air-fuel ratio to the stoichiometric air-fuel ratio) when compared to their operation with gasoline. According to the Eco-Indicator-99, these results represent a minor reduction (<1.3%) on the impact to human health, and on the deterioration of the ecosystem. However, it implies a 12.9% deterioration of the natural resources. Thermal equilibrium analysis, at the tailpipe conditions (~100 • C), showed that ethane, formaldehyde, ethylene and ethanol are the most relevant VOCs in terms of the amount of mass emitted. The use of ethanol in the gasoline reduced 20-40% of those emissions. These reductions implied an average reduction of 17% in the ozone formation potential.

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Section: Co Emission Indexsupporting

confidence: 92%

The Effect of Using Ethanol-Gasoline Blends on the Mechanical, Energy and Environmental Performance of In-Use Vehicles

et al. 2018

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“…Bibliographic data highlight a general reduction of engine-out emission [6][7][8]. Also a positive effect of alcohol content on thermal efficiency was noted, both on a single-cylinder engine at the test bed [9] and on a vehicle on a chassis dynamometer [10,11]. Blending ethanol with gasoline was also found to permit a higher compression ratio without knock occurrence [12].…”

Section: Introductionmentioning

confidence: 80%

Effect of Ethanol Content on Thermal Efficiency of a Spark-Ignition Light-Duty Engine

Simio

Gambino

Iannaccone

2012

ISRN Renewable Energy

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The use of bioethanol in the transport sector can contribute to mitigate the greenhouse gas emissions of the vehicles. To achieve this goal, together with a positive energy balance in global productive process of ethanol (well to tank), it is important that adding ethanol to gasoline does not cause a worsening of the efficiency of the internal combustion engine (tank to wheel). In this paper, a research activity on a commercial spark-ignition light-duty engine at the test bench is reported. The aim of the work was to characterize the effect of different bioethanol/gasoline blends on engine behaviour. Blends until 85% of ethanol were tested. Comparative studies of combustion development of gasoline and gasoline/ethanol blends at different concentrations have been made through the analysis of pressure cycles in combustion chamber. Moreover, emissions were collected and analyzed. Emissions downstream of the catalyst, measured with the blends, resulted quite similarly to the gasoline case. Instead, upstream the catalyst a reduction of emissions, proportional to oxygenated content was noted. Moreover, a general carbon dioxide reduction with ethanol blends was achieved due in particular to better engine thermal efficiency.

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“…corn, wheat and cassava) which are not desirable due to their food and feed value (60) . Many studies (61)(62)(63)(64)(65)(66) reported that more than 30% CO reduction was noticed in higher level ethanol blends. Celik et al (61) found 53% CO reduction for the blend E50 in 1C engine.…”

Section: Bioethanolmentioning

confidence: 99%

A Review on the Characteristics of Air Pollutants Emitted from Passenger Cars in Korea

Jung¹,

Kim²

2016

Journal of ILASS-Korea

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On-road source emissions are major air pollutants and have been associated with serious health effects in Seoul metropolis. Thus, it is of fundamental importance to have an accurate assessment of vehicle emissions in order to implement an effective air quality management policy. As a result, there is a need to overview vehicle emission characteristics of air pollutants. This article discusses vehicle exhaust sampling and chemical analysis, emission characteristics of air pollutants, and emission regulations from passenger cars. The vehicle exhaust sampling and chemical analysis methods were described in particulate matter and gaseous compounds. In this article, chassis dynamometer, measurement instrumentation for nano-particulate matter and carbon compounds analysis device were described. For the gasoline and diesel vehicles, the effective parameters of emissions were average vehicle speed, vehicle mileage and model year. The particle number emissions for diesel nano-particles were sensitive to the sampling conditions. Also, the particle number emissions with a diesel particle filter (DPF) largely reduced rather than those without it. This article also describes different emission characteristics of air pollutants according to biodiesel or bioethanol mixing ratio. The Korean emission standards for passenger cars were compared with those of the US and EU. Finally, the objective is to give an overview of relevant background information on emission characteristics of air pollutants from passenger cars in Korea.

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Combustion and emissions behavior for ethanol–gasoline blends in a single cylinder engine

Cited by 141 publications

References 18 publications

The Effect of Using Ethanol-Gasoline Blends on the Mechanical, Energy and Environmental Performance of In-Use Vehicles

The Effect of Using Ethanol-Gasoline Blends on the Mechanical, Energy and Environmental Performance of In-Use Vehicles

Effect of Ethanol Content on Thermal Efficiency of a Spark-Ignition Light-Duty Engine

A Review on the Characteristics of Air Pollutants Emitted from Passenger Cars in Korea

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