Effects of the Bore to Stroke Ratio on Combustion, Gaseous and Particulate Emissions in a Small Port Fuel Injection Engine Fueled with Ethanol Blended Gasoline

Jang, Ji-Young; Choi, Jonghui; Yi, Hoseung; Park, Sungwook

doi:10.3390/en13020321

Cited by 6 publications

(4 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ratio may be under square, square or over square but depended on preference for power at high engine speeds (rpm) (over square) or high torque at lower engine speeds (under square) and affects engine efficiency. Some researchers [73] applied the varied bore to stroke ratios to investigate fuel injection engine fueled with ethanol blended gasoline. The researchers reported that over square engine had higher compression ratio, higher pressure, faster combustion rate due to its larger flame surface area and larger turbulence intensity than under Similarly, some researchers [73] investigated the effect of bore/stroke ratio on a single cylinder two stroke opposed piston engine.…”

Section: Cylinder Bore and Piston Strokementioning

confidence: 99%

“…Some researchers [73] applied the varied bore to stroke ratios to investigate fuel injection engine fueled with ethanol blended gasoline. The researchers reported that over square engine had higher compression ratio, higher pressure, faster combustion rate due to its larger flame surface area and larger turbulence intensity than under Similarly, some researchers [73] investigated the effect of bore/stroke ratio on a single cylinder two stroke opposed piston engine. The researchers reported heat losses decrease with increasing square ratio, which resulted in improved mechanical efficiency with reduced specific fuel consumption (SFC).…”

Section: Cylinder Bore and Piston Strokementioning

confidence: 99%

See 1 more Smart Citation

Locomotive engines and the future of railway automotive power in Africa: A review

Ozigis¹,

Oche²,

Lawal³

2021

Nig. J. Tech.

View full text Add to dashboard Cite

This work presents the review of locomotives and the future of railway automotive power in Africa. Locomotives down time on account of inadequate spare parts still remains a challenge in African. It is thus, imperative to review the locomotives in African, to establish the current capabilities as well as provide recommendations to bridge the gaps and its extrapolated trends in future. Firstly, the comparison factors were track length, electrified rails, number of locomotives and yearly passengers on each of Egypt, Ghana, Kenya, Nigeria, South Africa and Zambia rails. Secondly, the focus was on engine parameters from literatures and maintenance logbooks of locomotives. From available data, it was found that South Africa and Egypt have more advanced rail system than the rest four selected countries. It was also found that additive manufacturing, 3D printing, ductile cast iron and die-forging can be used to produce the engine body for diesel engine using steel and aluminum alloys while aluminum silicon and tin doped with copper are good for reciprocation mechanisms. And finally, increased reliability of locomotives can be guided by an engine selection matrix, while use of renewable and energy hybridization are needed to meet the expansion of railroads in Africa.

show abstract

Section: Cylinder Bore and Piston Strokementioning

confidence: 99%

Section: Cylinder Bore and Piston Strokementioning

confidence: 99%

Locomotive engines and the future of railway automotive power in Africa: A review

Ozigis¹,

Oche²,

Lawal³

2021

Nig. J. Tech.

View full text Add to dashboard Cite

show abstract

“…If the diameter is smaller, then the stroke will be longer to give equal volume. This is, in fact, a common design practice for single-engine-cylinder FPLGs: to have the bounce chamber's diameter much larger than the combustion chamber, to counteract the large combustion force [2,[19][20][21] Thus, several simulation runs at no-load were carried out with a larger piston area for the BC to verify the expected result of shorter displacement on the BC side. Figures 3 and 4 show displacement vs. time and velocity graphs.…”

Section: No-load Operation: Variation Of Structural Parameter and Com...mentioning

confidence: 99%

Impact of Combustion Variance on Sustainability of Free-Piston Linear Generator during Steady-State Generation

et al. 2021

View full text Add to dashboard Cite

A free-piston linear generator (FPLG) has a number of advantages compared to a traditional crank-slider internal combustion engine, including better thermal and mechanical efficiencies, different fuel compatibility, and a higher power-to-weight ratio. For electric vehicle propulsion and generation of portable power, an FPLG is a very attractive alternative source of energy. This paper presents the development of an FPLG simulation model using MATLAB-Simulink and investigates the impact of combustion variance on its operation. Results provided insight into various characteristics of system behavior through variation of structural dimension and operational parameters. In steady-state operation with fixed electrical load and fixed ignition for combustion, it was found that consecutively low combustion pressures can easily lead to engine stoppage, pointing to the significance of control for continuous operation. Due to the absence of the moment of inertia and flywheel character of the rotating engine, a linear engine-generator is subject to ceased operation even after two consecutively low combustions under 10% variance. This will not be a fundamental problem in an ordinary crank-slider engine-generator, but in a linear engine-generator, control measure will be necessary to ensure sustained operation.

show abstract

“…For using alternative fuels, researchers applied different methods to ameliorate the performance of engines consuming biofuels. These methods included making various mixtures of the main fuel with ethanol, methanol and butanol [7][8][9][10][11], changing the geometry of the engine for using biofuels [12][13][14] and using different strategies for biofuels injections [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Compression Ratio of Bio-Fueled SI Engines on the Thermal Balance and Waste Heat Recovery Potential

et al. 2021

View full text Add to dashboard Cite

In internal combustion engines, a significant share of the fuel energy is wasted via the heat losses. This study aims to understand the heat losses and analyze the potential of the waste heat recovery when biofuels are used in SI engines. A numerical model is developed for a single-cylinder, four-stroke and air-cooled SI engine to carry out the waste heat recovery analysis. To verify the numerical solution, experiments are first conducted for the gasoline engine. Biofuels including pure ethanol (E100), E15 (15% ethanol) and E85 (85% ethanol) are then studied using the validated numerical model. Furthermore, the exhaust power to heat loss ratio (Q˙ex/Q˙ht) is investigated for different compression ratios, ethanol fuel content and engine speed to understand the exhaust losses potential in terms of the heat recovery. The results indicate that heat loss to brake power ratio (Q˙ht/W˙b) increases by the increment in the compression ratio. In addition, increasing the compression ratio leads to decreasing the Q˙ex/Q˙ht ratio for all studied fuels. According to the results, there is a direct relationship between the ethanol in fuel content and Q˙ex/Q˙ht ratio. As the percentage of ethanol in fuel increases, the Q˙ex/Q˙ht ratio rises. Thus, the more the ethanol in the fuel and the less the compression ratio, the more the potential for the waste heat recovery of the IC engine. Considering both power and waste heat recovery, the most efficient fuel is E100 due to the highest brake thermal efficiency and Q˙ex/Q˙ht ratio and E85, E15 and E00 (pure gasoline) come next in the consecutive orders. At the engine speeds and compression ratios examined in this study (3000 to 5000 rpm and a CR of 8 to 11), the maximum efficiency is about 35% at 5000 rpm and the compression ratio of 11 for E100. The minimum percentage of heat loss is 21.62 happening at 5000 rpm and the compression ratio of 8 by E100. The minimum percentage of exhaust loss is 35.8% happening at 3000 rpm and the compression ratio of 11 for E00. The most Q˙ex/Q˙ht is 2.13 which is related to E100 at the minimum compression ratio of 8.

show abstract

Effects of the Bore to Stroke Ratio on Combustion, Gaseous and Particulate Emissions in a Small Port Fuel Injection Engine Fueled with Ethanol Blended Gasoline

Cited by 6 publications

References 25 publications

Locomotive engines and the future of railway automotive power in Africa: A review

Locomotive engines and the future of railway automotive power in Africa: A review

Impact of Combustion Variance on Sustainability of Free-Piston Linear Generator during Steady-State Generation

Effects of Compression Ratio of Bio-Fueled SI Engines on the Thermal Balance and Waste Heat Recovery Potential

Contact Info

Product

Resources

About