Mechanical efficiency prediction methodology of the hypocycloid gear mechanism for internal combustion engine application

ElBahloul, Mostafa A.; Aziz, El-Sayed; Chassapis, Constantin

doi:10.1007/s12008-018-0508-2

Cited by 7 publications

(8 citation statements)

References 17 publications

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“…For comparison, an ideal machine has a mechanical efficiency of 100% and a typical internal combustion engine has a mechanical efficiency of around 95% [12]. Thus a 10% mechanical efficiency is very low and this means around 90% of the potential power output is lost to the surroundings.…”

Section: Analysis Resultsmentioning

confidence: 99%

Thermodynamics education for energy transformation: a Stirling Engine experiment

Yeadon

Quinn

2021

Phys. Educ.

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We present a thermodynamics experiment suitable for first year undergraduate students employing Stirling Engines to create a demonstration of energy transformation and to measure the mechanical efficiency of such engines. Using an inexpensive transparent chambered Stirling Engine, students can connect concepts such as the theoretical pressure-volume diagram with the physical movements of the engine’s pistons and the resultant useful output work of a spinning wheel. We found the majority of students successfully complete this experiment obtaining results similar to when performed by the authors. In addition to the core thermodynamics lesson, this experiment incorporates DC circuits, oscilloscopes, and data analysis so it can be integrated into a wider undergraduate physics course to combine the teaching of multiple subjects.

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Section: Analysis Resultsmentioning

confidence: 99%

Thermodynamics education for energy transformation: a Stirling Engine experiment

Yeadon

Quinn

2021

Phys. Educ.

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“…A methodology for predicting the mechanical efficiency of the HGM was developed in previous works. 23,24 The methodology considered the three major elements of the HGM: the internal gear mesh losses, the carrier rolling bearing losses, and the sliding bearings losses. It should be noted that the HGM frictional losses comprise both mechanical and spin power losses; however, the model proposed includes only the mechanical power losses.…”

Section: Thermodynamic Modelmentioning

confidence: 99%

“…Therefore, the piston side thrusting into the cylinder walls is eliminated and the piston frictional losses are minimized allowing for increased engine brake power. 23,24 In addition, there is no need for the wrist pin bearing and the piston skirt, allowing for a shorter and lower weight piston without concerns of chocking or piston slap. More importantly, the kinematic features of the HGM engine ensured that the piston dwells at both the TDC and BDC allowing for the constant-volume combustion process at one end and more time for a full cylinder intake charge at the other.…”

Section: Introductionmentioning

confidence: 99%

Performance study of the hypocycloid gear mechanism for internal combustion engine applications

ElBahloul

Aziz

Chassapis

2019

International Journal of Engine Research

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Fuel conversion efficiency is one of the main concerns in the field of internal combustion engine systems. Although the Otto cycle delivers the maximum efficiency possible in theory, the kinematics of the slider–crank mechanism of the conventional internal combustion engines makes it difficult to reach this level of efficiency in practice. This study proposes using the unique hypocycloid gear mechanism instead of the conventional slider–crank mechanism for the internal combustion engines to increase engine efficiency and minimize frictional power losses. The hypocycloid gear mechanism engine’s kinematics provides the means for the piston-rod assembly to reciprocate in a straight-line motion along the cylinder axis besides achieving a nonlinear rate of piston movement. As a result, this characteristic allows for a true constant-volume combustion, which in turn would lead to higher work output. An in-cylinder gas volume change model of the hypocycloid gear mechanism engine was developed and incorporated into the thermodynamic model for the internal combustion engine cycle. The thermodynamic model of the hypocycloid gear mechanism engine was developed and simulated using MATLAB/Simulink software. A comparison between the conventional engine and the hypocycloid gear mechanism engine in terms of engine performance characteristics showed the enhancements achieved using hypocycloid gear mechanism for internal combustion engine applications. The hypocycloid gear mechanism engine analysis results indicated higher engine efficiency approaching that of the Otto cycle.

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“…This paper conducts an experimental study on the performance of the internal combustion engine radiator, and the process will be explained in detail later. Due to the high cost of the experimental test and the extended period [2], it is impossible to analyze the heat flow field of the engine room comprehensively. We used CFD technology to simulate the flow field of the engine room [2], and this method successfully improved the heat dissipation performance of the engine room.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the high cost of the experimental test and the extended period [2], it is impossible to analyze the heat flow field of the engine room comprehensively. We used CFD technology to simulate the flow field of the engine room [2], and this method successfully improved the heat dissipation performance of the engine room. It comprehensively considers convective heat transfer and radiation heat transfer in the engine room [3].…”

Section: Introductionmentioning

confidence: 99%

Establishment of a Coupling Model for the Prediction of Heat Dissipation of the Internal Combustion Engine Based on Finite Element

Mu¹,

Wang²,

Hong³

et al. 2022

Energy Engineering

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The aerodynamics and heat transfer performance in the rear-mounted automobile cabin have an important influence on the engine's safety and the operational stability of the automobile. The article uses STAR-CCM and GT-COOL software to establish the 3D wind tunnel model and engine cooling system model of the internal combustion engine. At the same time, we established a 3D artificial coupling model through parameter transfer. The research results show that the heat transfer coefficient decreases with the increase of the comprehensive drag coefficient of the nacelle. This shows that the cabin flow field has an important influence on the heat transfer coefficient. The mainstream temperature rise of the engine room increases with the increase of the engine load. It is proved that vehicle speed affects the amount of heat dissipation of the engine room internal combustion engine under certain load conditions. The article provides a more effective and fast calculation method for the research on the heat dissipation of the internal combustion engine and the optimization of the cooling system equipment.

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Mechanical efficiency prediction methodology of the hypocycloid gear mechanism for internal combustion engine application

Cited by 7 publications

References 17 publications

Thermodynamics education for energy transformation: a Stirling Engine experiment

Thermodynamics education for energy transformation: a Stirling Engine experiment

Performance study of the hypocycloid gear mechanism for internal combustion engine applications

Establishment of a Coupling Model for the Prediction of Heat Dissipation of the Internal Combustion Engine Based on Finite Element

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