Exploring the limits of a down-sized ethanol direct injection spark ignited engine in different configurations in order to replace high-displacement gasoline engines

Baêta, José Guilherme Coelho; Pontoppidan, M.; Silva, Thiago Rodrigo Vieira da

doi:10.1016/j.enconman.2015.08.041

Cited by 54 publications

(18 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Higher latent heat of evaporation and greater octane rating of alcohols delay onset of knocking which allows engine to adopt higher compression ratios. [3][4][5][6] Apart from methanol and ethanol, butanol is also gaining lot of interest for both SI and compression ignition (CI) engines. Butanol has higher heating value compared to ethanol and methanol.…”

Section: Introductionmentioning

confidence: 99%

Optical investigation of flash boiling and its effect on in-cylinder combustion for butanol isomers andiso-octane

Kale

Banerjee

2020

International Journal of Engine Research

View full text Add to dashboard Cite

Performance of a gasoline direct injection engine significantly depends on the fuel injection phenomenon. It has been shown that variation in the fuel thermo-physical properties and in-cylinder thermodynamic conditions can adversely affect engine performance. Spray collapse due to flash boiling is the consequence of such varying in-cylinder thermodynamics. It has also been observed that gasoline direct injection engines have higher particulate matter emissions compared to port fuel injection engines. One of the possible reasons for this observation may be fuel impingement on the piston head and spray collapse at high fuel injector temperature. In the present work, experiments have been performed to understand spray characteristics under flash boiling conditions and ultimately its effect on in-cylinder combustion quality for the three different fuels: n-butanol, iso-butanol and iso-octane. To mimic in-cylinder conditions, hot fuel was introduced inside an optically accessible engine. It was observed that fuel temperature and their thermo-physical properties have a significant effect on piston head wetting and pool fire on the piston top. Butanol isomers showed significant reduction in sooty combustion with increase in fuel temperature. However, iso-octane showed higher wall wetting at elevated fuel temperature due to spray collapse.

show abstract

Section: Introductionmentioning

confidence: 99%

Optical investigation of flash boiling and its effect on in-cylinder combustion for butanol isomers andiso-octane

Kale

Banerjee

2020

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…A downsized gasoline engine is one of the proven technologies that improves engine thermal efficiency and thus reduces automotive fleet CO2 emissions, by as much as 25% [2]. Downsized engines equipped with turbo-or super-chargers operate at higher engine loads to deliver the same power outputs as larger engines, thus, downsized engines lead to lower pumping losses and higher efficiency at part load operating conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Baê ta et al [2] performed experiments on a 1.4 L downsized turbocharged engine, of which the combustion system, exhaust system and turbocharger were optimized. The 1.4 L downsized turbocharged engine had the same peak torque and power output as a 2.4 L NA-engine, but it produced a higher brake thermal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Ethanol blends in spark ignition engines: RON, octane-added value, cooling effect, compression ratio, and potential engine efficiency gain

et al. 2017

View full text Add to dashboard Cite

Downsized spark ignition engines have the benefit of high thermal efficiency; however, severe engine knock is a challenge. Ethanol, a renewable gasoline alternative, has a much higher octane rating and heat of vaporization than conventional gasoline, therefore, ethanol fuels are one of the options to prevent knock in downsized engines. However, the performance of ethanol blends in modern downsized engines, and the contributions of the research octane number (RON), octane sensitivity (defined as RON-MON) and charge cooling to suppressing engine knock are not fully understood. In this study, eight fuels were designed and tested, including four splash blended ethanol fuels (10 vol.%, 20 vol.%, 30 vol.% and 85 vol.% ethanol, referred to as E10, E20, E30 and E85), one match blended fuel (E0-MB) with no ethanol content but the same octane rating as E30, and three fuels (F1-F3) with different combinations of RON and octane sensitivity. The experiments were conducted in a single-cylinder direct-injection spark ignition (DISI) research engine. Load and spark timing sweep tests at 1800 rpm were carried out for E10-E85 to assess the combustion performance of these ethanol blends. In order to investigate the impact of charge cooling on combustion characteristics, the results of the load sweep for E0-MB were compared to those of E30. Load sweep tests were also carried out for F1-F3 to understand the impacts of RON and octane sensitivity on suppressing engine knock. The results showed that at the knock-limited engine loads, splash blended ethanol fuels with a higher ethanol percentage enabled higher engine thermal efficiency through allowing more advanced combustion phasing and less fuel enrichment for limiting the exhaust gas temperature under the upper limit of 850 °C, which was due to the synergic effects of higher RON and octane sensitivity, as well as better charge cooling. In comparison with octane sensitivity, RON was a more significant factor in 2 improving engine thermal efficiency. Charge cooling reduced engine knock tendency through lowering the unburned gas temperature.

show abstract

“…To do so, turbochargers are used to recover the lost power due to downsizing and, at the same time, reducing both engine pumping work and friction [131,132]. The downsizing effectiveness was demonstrated by [133], in which a 1.4-L ethanol engine was able to replace gasoline engines as big as 2.4 L and 3.0 L, keeping the original performance and improving fuel consumption.…”

Section: Recent Advances and Trends In Internal Combustion Enginesmentioning

confidence: 99%

The misleading total replacement of internal combustion engines by electric motors and a study of the Brazilian ethanol importance for the sustainable future of mobility: a review

Malaquias

Netto

Filho

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

Self Cite

View full text Add to dashboard Cite

The sustainable future of mobility should not be viewed as the burial of the internal combustion engine (ICE), nowadays the main source of vehicular propulsion. Even with the increasing electrification of the transport means, the low global percentage of the electric fleet, around 0.2% of the total road vehicles, associated with an annual growth rate of less than 60%, indicates that they will not significantly change the market share in the short-and medium-term periods. This means that fuel demanded by ICEs and pollutant emissions generated by them will be very relevant in the years to come. Thus, the search for significant advances in technology associated with the use of renewable fuels is very important for environmental and economic sustainability. In this regard, the present work intends to demonstrate that the association between Brazilian ethanol and advanced technology in ICEs is a promising alternative for a more sustainable global mobility in the future. For this purpose, some ethanol properties are presented to justify its relevance as an ideal biofuel for highly boosted and efficient engines. Then, environmental, social, ethical and economic impacts arising from electric vehicles are investigated, demystifying the zero-emission vehicle terminology attributed to them and, finally, new technologies for ICEs are presented, proving that they are constantly evolving and improving, which is fundamental to the future of the world automotive fleet.

show abstract

Exploring the limits of a down-sized ethanol direct injection spark ignited engine in different configurations in order to replace high-displacement gasoline engines

Cited by 54 publications

References 26 publications

Optical investigation of flash boiling and its effect on in-cylinder combustion for butanol isomers andiso-octane

Optical investigation of flash boiling and its effect on in-cylinder combustion for butanol isomers andiso-octane

Ethanol blends in spark ignition engines: RON, octane-added value, cooling effect, compression ratio, and potential engine efficiency gain

The misleading total replacement of internal combustion engines by electric motors and a study of the Brazilian ethanol importance for the sustainable future of mobility: a review

Contact Info

Product

Resources

About