Relevant bibliographies by topics / Crankshaft offset

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Crankshaft offset'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Crankshaft offset"

1

S. Abdulhussain, Uzaldin, Taj Elssir Hassan, and Maisara Mohy Eldin Gasim. "Theoretical Performance Comparison between Inline, Offset and Twin Crankshaft Internal Combustion Engine Models." FES Journal of Engineering Sciences 2, no. 1 (November 6, 2006): 26. http://dx.doi.org/10.52981/fjes.v2i1.91.

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Twin crankshaft is a new engine arrangement introduced to overcome cylinder’s liner wear problems encountered in the conventional inline crankshaft engine due to the effect of the side thrust force. The offset crankshaft arrangement was also introduced to solve the same problem. In this work a computer programs was built to obtain the theoretical performance comparison between the three engines arrangements (inline, twin and offset crankshaft engines), and compared the theatrical performance with the experimental results, which done to the engine’s models. The study results show that the twin crankshaft engine model exhibited no thrust force, and that the thrust force in the offset crankshaft model is smaller than that in the inline crankshaft engine model. These agree with experimental results obtained from the same engine model.
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Hassan, Taj Elssir, Abdelfattah Bilal, and Maisara Mohy Eldin Gasim. "Theoretical Performance Comparison between Inline, Offset and Twin Crankshaft Internal Combustion Engines." FES Journal of Engineering Sciences 3, no. 1 (November 6, 2008): 17. http://dx.doi.org/10.52981/fjes.v3i1.76.

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The twin crankshaft engine is anew configuration of internal combustion engine that introduced to solve the engine liner wear problems, increase the engine efficiency and it has other advantages over conventional engines. In this research, a computational work was carried out to compare the performance of three l engine configurations, namely, the conventional (inline) engine, the offset crankshaft engine and the twin crankshaft engine, of the same cylinder bore, speed, crank arm, piston mass and heat addition. The performance measured was the side thrust force that causes liner wear and the output torque. Results showed that the twin crankshaft engine is superior in terms of torque which means it has larger efficiency than the other configurations.
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Sun, Jun, and Changlin Gui. "Effect of Lubrication Status of Bearing on Crankshaft Strength." Journal of Tribology 129, no. 4 (June 6, 2007): 887–94. http://dx.doi.org/10.1115/1.2768977.

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There is direct interaction between crankshaft and bearing in an internal combustion engine. The effect of lubrication status of bearing was not considered in the present calculation of crankshaft strength. A given oil film pressure distribution of bearing was generally used as load acted on journal. In this paper, a crankshaft-bearing system was taken as the study object. On the basis of lubrication analysis of misaligned bearing caused by crankshaft deformation, the stress and strength of-crankshaft were calculated using analytical oil film pressure of bearing as the load boundary condition. Crankshaft deformation and bearing load were calculated by whole crankshaft beam-element method. The lubrication of crankshaft bearing was analyzed by the kinetics method. Crankshaft stress was calculated by the finite-element method. The results show that when the effect of crankshaft deformation under load is considered, the offset distribution of oil film pressure of bearing appears and the highest oil film pressure increases remarkably, which result in the stresses of local area on fillet surface of crankshaft journal increase obviously and the safety factor of crankshaft decreases.
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Shen, Nan Yan, Jing Li, Xue Dong Wang, Jun Ye, and Zhi Xiang Yu. "Analysis and Detection of Elastic Deformation of the Large-Scale Crankshaft in Non-Circular Grinding." Applied Mechanics and Materials 532 (February 2014): 285–90. http://dx.doi.org/10.4028/www.scientific.net/amm.532.285.

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Due to the discontinuous axis and the big ratio of length to diameter, the large-scale crankshaft is easy to generate the complex elastic deformation under the effect of the huge gravity and the clamping force on non-circular grinding machine. The distinctive deformation deteriorates the coaxiality of all the main journals and thus the grinding precision of crankpins in non-circular grinding. In this paper, the statics analysis of large-scale crankshaft has been conducted by using the finite element simulation. The overall deformation of crankshaft and the position offset of each main journal center without or with the auxiliary supports have been simulated and contrasted. The results manifest that the auxiliary support forces produced by the steady rests have the positive effect on the compensation for crankshaft deformation. On this basis, to satisfy the demand of position adjustment of the upper and lower support pads of servo-controlled open steady rest, the on-machine measurement method and device of the position of main journal center is proposed. And then the offset calculation model of the main journal center is deduced using the measured data. The measurement method and device are beneficial for the straightening of the crankshaft and the improvement of machining accuracy of crankpins in non-circular grinding.
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Cho, M. R., J. S. Kim, D. Y. Oh, and D. C. Han. "The effects of crankshaft offset on the engine friction." International Journal of Vehicle Design 31, no. 2 (2003): 187. http://dx.doi.org/10.1504/ijvd.2003.003183.

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Hongwei, Yan, Yang Jin, and Zhang Baocheng. "Analysis of the Influences of Piston Crankshaft Offset on Piston Secondary Movements." Open Mechanical Engineering Journal 9, no. 1 (October 7, 2015): 933–37. http://dx.doi.org/10.2174/1874155x01509010933.

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This paper takes dynamics analysis on the piston and the dynamic lubrication theory on the skirt and the ring of piston as the basis. Using AVL Glide software, through the establishment of the analysis model of the piston secondary movements, this study focuses on the effects of the crankshaft bias on piston secondary movements’ characteristics. This paper takes 5 different offsets, by comparing the piston lateral displacement, transverse movement speed, transverse acceleration, swinging angle, swing angular velocity and angular acceleration, finds out the relationships between crank offset value and the piston “slap”, piston impact energy and piston skirt friction loss, thus, provides the basis for the design of internal combustion engines.
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Grabowski, Łukasz, Konrad Pietrykowski, and Paweł Karpiński. "Energetic Analysis of the Aircraft Diesel Engine." MATEC Web of Conferences 252 (2019): 05012. http://dx.doi.org/10.1051/matecconf/201925205012.

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The analysis of the distribution of thermal energy generated during the combustion process in internal combustion engines and the estimation of individual losses are important regarding performance and efficiency. The article analyses the energy balance of the designed two-stroke opposed piston diesel engines with offset, i.e. the angle by which the crankshaft at the side of exhaust ports is ahead of the crankshaft at the side of intake ports. Based on the developed zero-dimensional engine model, a series of simulations were performed in steady-state conditions using the AVL BOOST software. The values of individual energy losses, including cooling losses, exhaust gas losses, friction losses were obtained. The influence of decreasing and increasing the offset on the performance of the tested engine was analysed.
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Guzzomi, A. L., D. C. Hesterman, and B. J. Stone. "Some Effects of Piston Friction and Crank or Gudgeon Pin Offset on Crankshaft Torsional Vibration." Journal of Ship Research 54, no. 01 (March 1, 2010): 41–52. http://dx.doi.org/10.5957/jsr.2010.54.1.41.

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The varying inertia associated with reciprocating mechanisms leads to nonlinear frequency coupling between rotational speed and an engine system's average torsional natural frequencies. This coupling can cause secondary resonance problems. Recent work by the authors has shown that piston-to-cylinder friction and gudgeon pin or crank offset can modify coupling behavior. These effects can be demonstrated by analysis of an engine's receptance function and through time simulations. This paper presents the derivation of a single-cylinder engine receptance in the presence of piston-to-cylinder friction. Simulations are then used to investigate some of the effects of piston-to-cylinder friction, offset, and excitation phase on the frequency content of the crankshaft velocity. Simulations indicate that nonlinear coupling is affected by these variables, which has implications for secondary resonance detection and prevention. The most significant finding is that stronger coupling behavior can occur when piston-to-cylinder lubrication breaks down.
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Srirussamee, Kasama, Anak Khantachawana, Bunheng Hok, and Aphinan Phukaoluan. "Thermomechanical Performance of the Offset Crankshaft Heat Engine Driven by TiNiCu Shape Memory Alloys." Engineering Journal 25, no. 2 (February 28, 2021): 85–93. http://dx.doi.org/10.4186/ej.2021.25.2.85.

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Gupta, BK, A. Rehman, and ND Mittal. "Validating experimentally the gain in torque due to crankshaft offset of an internal combustion engine." International Journal of Engineering, Science and Technology 6, no. 2 (March 11, 2014): 76. http://dx.doi.org/10.4314/ijest.v6i2.6.

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Dissertations / Theses on the topic "Crankshaft offset"

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Mlčoch, Pavel. "Čtyřválcový zážehový motor s excentrickým klikovým mechanismem pro osobní vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232114.

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This Diploma Thesis is aimed at exploring the potential of offset crankshaft mechanism for four cylinder inline petrol engine in terms of reducing the frictional losses of the piston group. Thesis deals with the influence of eccentricity on kinematics, dynamics and balance of the crank train. Furthermore, specific crankshaft balancing is elaborated and applied on 3D CAD model of the crankshaft. Calculation of fatigue safety factor using the advanced LSA method that takes into consideration the effect of forced torsional vibration and utilizes outputs from the FEA software (ANSYS APDL) is performed as well. Thesis also includes design of two options of rubber torsion damper mounted on the engine belt pulley and the follow-up choosing of the more advisable one.
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Conference papers on the topic "Crankshaft offset"

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Jibben, John J. "Analysis of an Extended Stroke, (Offset Crankshaft), Engine." In SAE 2006 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2006. http://dx.doi.org/10.4271/2006-01-0014.

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"CRANKSHAFT MECHANISM WITH OFFSET FOR THE COMBUSTION ENGINE." In Engineering Mechanics 2019. Institute of Thermomechanics of the Czech Academy of Sciences, Prague, 2019. http://dx.doi.org/10.21495/71-0-65.

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Shin, Steve, Annette Cusenza, and Fanghui Shi. "Offset Crankshaft Effects on SI Engine Combustion and Friction Performance." In SAE 2004 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2004. http://dx.doi.org/10.4271/2004-01-0606.

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Wakabayashi, Ryo, Masaaki Takiguchi, Takamasa Shimada, Yasuharu Mizuno, and Takahiro Yamauchi. "The Effects of Crank Ratio and Crankshaft Offset on Piston Friction Losses." In SAE 2003 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2003. http://dx.doi.org/10.4271/2003-01-0983.

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Nakayama, Kei, Seiji Tamaki, Hiroyuki Miki, and Masaaki Takiguchi. "The Effect of Crankshaft Offset on Piston Friction Force in a Gasoline Engine." In SAE 2000 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-0922.

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6

Takiguchi, Masaaki, Yohei Yoshiga, and Mohd Sofwam bin Lukman. "Effects of Boost Pressure on Piston Lubrication of Diesel Engine." In ASME 2006 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ices2006-1322.

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The state of piston lubrication-has been determined with reference to piston friction force measured by our developed single-cylinder supercharged small bore diesel engine with a boost pressure of up to 150kPa. The result is that the state of lubrication deteriorates markedly immediately before the compression top dead center due to increased boost pressure and immediately after the compression top dead center due to increased engine load. Moreover, the crankshaft offset, piston pin offset and multi-grade oil further deteriorate piston lubrication with a boost pressure.
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Fischer, Ian S., and Sahidur Rahman. "Dynamics of the Generalized Slider-Crank Mechanism." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0321.

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Abstract Dual-number techniques are used to analyze the dynamics of the slider crank mechanism generalized to consider the effects of the cylinder axis being offset and non-perpendicular to the crankshaft axis, conditions which result in reciprocating machinery such as engines and compressors from manufacturing tolerances. Results for various cases are shown and the implications for the design engineer are discussed.
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Fischer, Ian S., and Sahidur Rahman. "Kinematics of the Generalized Slider-Crank Mechanism." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0320.

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Abstract Dual-number techniques are used to analyze the kinematics and dynamics of the slider crank mechanism generalized to consider the effects of the cylinder axis being offset and non-perpendicular to the crankshaft axis, conditions which result in reciprocating machinery such as engines and compressors from manufacturing tolerances. The kinematics of the mechanism are evaluated with a Newton-Raphson method using dual-number coordinate-transformation matrices which in this work is extended to include mechanisms with spherical joints. Results for various cases are shown and are ready to be used in a study of the dynamics of the generalized slider-crank.
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Ning, Lipu, Xianghui Meng, and Youbai Xie. "Numerical Study of Piston Skirt-Liner Lubrication Considering the Effects of Deformation in Internal Combustion Engines." In ASME 2012 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icef2012-92025.

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This paper presents a comprehensive lubrication model for piston skirt-liner system of internal combustion engines. In the model it is included that the effects of the surface roughness, the piston skirt surface geometry, the piston pin offset, the crankshaft offset, and the lubricant viscosity on the piston secondary motion and lubrication performance. Especially, the effects of the thermal and the elastic deformation of the piston skirt and the cylinder liner, and the piston skirt deformations due to the combustion pressure and the piston axial inertia, are considered as the key task in this study. The results show that the combustion force, the working temperature and the piston axial inertia all play important roles in the piston-skirt lubrication. Also, considering the elastic deformation of the piston skirt and the cylinder liner is beneficial to the prediction of piston-skirt lubrication more accurately. The developed program in this study can provide a useful tool for the analysis of the piston-liner system lubrication problem.
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Behrens, B. A., S. Reinsch, and A. Specker. "Further Development of Flashless Forging Operations for Flat Long Pieces." In ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58019.

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Flashless forging operations, which are also known as precision forging operations, generate high quality parts concerning the quality of surfaces and dimensional accuracy. Precision forging processes have been industrially established for axis-symmetric parts e.g. gearwheels and steering pinions. Further development of the technology to more complex parts e.g. helical gears, connecting rods and crankshafts is expected to lead to a wider implementation of the technology into forging industry. Heavy-duty automotive components offer a wide application field for flashless forged parts. Advantages like shortened production cycles which are achieved by eliminating machining operations and the saving of raw material contribute to the ongoing cost-saving trend in the automobile industry. The design process for complex precision forged parts has to fulfill special requirements to consider the distinctions of this technique. This article explains the adopted methods and a development process of a precision forging process describing the design of a connecting rod and a crankshaft.
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