Thailand Fuel Performance and Emissions in Flex Fuel Vehicles

Thummadetsak, Thummarat; Tipdecho, Chonchada; Wongjareonpanit, Umaporn; Monnum, Pakasit

doi:10.4271/2010-01-2132

Cited by 2 publications

(3 citation statements)

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“…Under transient test conditions, based on the driving cycle pattern the emission measurement for FFV will be carried to further optimize the vehicle performance and emission characteristics. [129][130][131] As similar to steady-state conditions, the performance and regulated emissions characteristics of FFV like HC, CO, CO 2 , and NO X have followed a similar trend with ethanol blends under the different transient test cycles. [132][133][134] The regulated emissions features are studied prominently in steady-state conditions by the researchers and the characteristics features of those emissions are discussed in Section 4.…”

Section: Performance and Regulated Emission Characteristicsmentioning

confidence: 59%

“…The details of the above‐mentioned testing cycles with cycle time, distance, testing phases, average and maximum speed are elaborated in Figure 10. Under transient test conditions, based on the driving cycle pattern the emission measurement for FFV will be carried to further optimize the vehicle performance and emission characteristics 129‐131 . As similar to steady‐state conditions, the performance and regulated emissions characteristics of FFV like HC, CO, CO 2 , and NO X have followed a similar trend with ethanol blends under the different transient test cycles 132‐134 .…”

Section: Flexible Fuel Vehicle Output Characteristics Under Transient...mentioning

confidence: 99%

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Critical review on recent progress of ethanol fuelled flex‐fuel engine characteristics

Azhaganathan

Ashok

2022

Intl J of Energy Research

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Summary Ethanol‐powered spark ignition (SI) engines have the potential to mitigate the twin crisis of fossil fuel depletion and exhaust emissions. However, the successful promotion of ethanol is hindered due to the restriction of fuel blend diversity and design features in the conventional SI engine. The fuel flexibility can be overcome by the use of flex‐fuel engine (FFE) technology with appropriate changes in engine design features for a wide range of ethanol blends. The understanding of FFE based on various technical aspects has greater potential in the automotive sector. Therefore, this review paper provides a holistic approach to critically analyze the various technical aspects of FFE. In this work, the application of ethanol blends on FFE output characteristics is reviewed critically considering the effects of engine operating conditions and parameters. Further, the impact of ethanol blends on material compatibility, cold starting characteristics, and unregulated emissions are analyzed. The outcome of the study shows that combustion and performance characteristics such as cylinder pressure(CP), heat release rate (HRR), and brake thermal efficiency (BTE) are improved in FFE operation due to the clean‐burning characteristics of ethanol blends. Also, carbon monoxide(CO) and hydrocarbon (HC) emissions decreased without any significant improvement in nitrogen oxides (NOx) emissions with a wide range of ethanol shares in FFE. Finally, this study summarizes the present status of research in FFE and creates a route towards the direction of multidisciplinary research need in the future that supports the application of different types of biofuels in FFE.

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Section: Performance and Regulated Emission Characteristicsmentioning

confidence: 59%

Section: Flexible Fuel Vehicle Output Characteristics Under Transient...mentioning

confidence: 99%

Critical review on recent progress of ethanol fuelled flex‐fuel engine characteristics

Azhaganathan

Ashok

2022

Intl J of Energy Research

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“…We determine the vehicle efficiency effect of ethanol by compiling paired energy efficiency data from all known studies of existing SI-engine vehicles operating on ethanol/gasoline blends and pure gasoline. − The statistical analysis is based on those studies that tested both ethanol/gasoline blends (with nominal ethanol volume no less than 5%) and gasoline on the same vehicle models under comparable real-world driving conditions or over the same standard drive cycles on a dynamometer, excluding tests on fuel/vehicle combinations that are not in actual use (e.g., regular gasoline vehicles on blends higher than E20). Tests under different controlled conditions (e.g., different ambient temperatures and accumulated vehicle mileages) and on fuels of different targeted properties (e.g., distillation characteristics and vapor pressures) were considered individually.…”

Section: Methodsmentioning

confidence: 99%

Effects of Ethanol on Vehicle Energy Efficiency and Implications on Ethanol Life-Cycle Greenhouse Gas Analysis

Yan

Inderwildi

King

et al. 2013

Environ. Sci. Technol.

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Bioethanol is the world's largest-produced alternative to petroleum-derived transportation fuels due to its compatibility within existing spark-ignition engines and its relatively mature production technology. Despite its success, questions remain over the greenhouse gas (GHG) implications of fuel ethanol use with many studies showing significant impacts of differences in land use, feedstock, and refinery operation. While most efforts to quantify life-cycle GHG impacts have focused on the production stage, a few recent studies have acknowledged the effect of ethanol on engine performance and incorporated these effects into the fuel life cycle. These studies have broadly asserted that vehicle efficiency increases with ethanol use to justify reducing the GHG impact of ethanol. These results seem to conflict with the general notion that ethanol decreases the fuel efficiency (or increases the fuel consumption) of vehicles due to the lower volumetric energy content of ethanol when compared to gasoline. Here we argue that due to the increased emphasis on alternative fuels with drastically differing energy densities, vehicle efficiency should be evaluated based on energy rather than volume. When done so, we show that efficiency of existing vehicles can be affected by ethanol content, but these impacts can serve to have both positive and negative effects and are highly uncertain (ranging from -15% to +24%). As a result, uncertainties in the net GHG effect of ethanol, particularly when used in a low-level blend with gasoline, are considerably larger than previously estimated (standard deviations increase by >10% and >200% when used in high and low blends, respectively). Technical options exist to improve vehicle efficiency through smarter use of ethanol though changes to the vehicle fleets and fuel infrastructure would be required. Future biofuel policies should promote synergies between the vehicle and fuel industries in order to maximize the society-wise benefits or minimize the risks of adverse impacts of ethanol.

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Thailand Fuel Performance and Emissions in Flex Fuel Vehicles

Cited by 2 publications

References 8 publications

Critical review on recent progress of ethanol fuelled flex‐fuel engine characteristics

Critical review on recent progress of ethanol fuelled flex‐fuel engine characteristics

Effects of Ethanol on Vehicle Energy Efficiency and Implications on Ethanol Life-Cycle Greenhouse Gas Analysis

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