Search Results - Pistone, D~
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Tribology of piston skirt conjunction
Published 2011“…Frictional losses in the piston skirt to cylinder liner conjunction account for approximately 2.5% of the energy supplied to the modern car [1]. …”
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Elastodynamics of piston compression rings
Published 2016“…The piston ring pack accounts for a disproportionate amount of the total engine frictional losses. …”
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The influence of piston ring geometry and topography on friction
Published 2013Get full text
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Tribodynamics of the piston compression ring conjunction
Published 2016Get full text
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Integrated investigation of piston–cylinder impact-induced noise and passive control of the piston’s secondary motion using nonlinear absorbers
Published 2016“…Although alternative power sources are getting well-established, transportation will remain primarily dependent on IC engines using fossil fuels for at least a few more decades. …”
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Influence of boundary conditions on starvation of piston ring conjunction
Published 2017“…This is also true of piston compression ring as well. A 2D hydrodynamic solver using Reynolds equation is to analyse the differences between predicted conditions with a flooded inlet and that arising from a more realistic determined zero-reverse boundary condition for lubricant flow post inlet wedge stagnation point. …”
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Investigation into some condition-monitoring techniques for piston engines
Published 2020Get full text
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Thermo-mixed hydrodynamics of piston compression ring conjunction
Published 2013Get full text
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An investigation into the oil transport and starvation of piston-ring pack
Published 2018“…Inlet boundaries are calculated for an engine cycle of a 4-cylinder, 4-stroke gasoline engine operating at 1500rpm with conditions pertaining to the New European Drive Cycle (NEDC). …”
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Tribology of piston-compression-ring-to-cylinder-liner conjunction
Published 2018“…Although it is known that CDA has beneficial gains for emissions and fuel economy, it is found that frictional losses can increase for the top compression ring up to 9.53%. …”
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A 2D hydrodynamic solver of the Reynolds equation for the piston ring-liner conjunction
Published 2016“…It is essential for the automotive industry to improve efficiency and mitigate frictional losses. About 20-25% of frictional losses arise in the piston ring pack-liner assembly. …”
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The influence of inter-ring pressures on piston-ring/liner tribological conjunction
Published 2012Get full text
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The measurement of liner - piston skirt oil film thickness by an ultrasonic means
Published 2006“…These pulses were used to determine the oil film thickness as the piston skirt passed over the sensor location. Oil films in the range 2 to 21 μm were recorded varying with engine speeds. …”
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Cavitating flow in engine piston ring-cylinder liner conjunction
Published 2013“…Another problem in any slider bearing-type contact is lubricant film rupture and cavitation in the conjunctional outlet zone, reducing load carrying capacity and potentially leading to erosion damage. A cavitation model presented in two-phase flow CFD analysis of the ring-bore contact under isothermal conditions. …”
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Assessment of thermo-structural effects on EHL piston skirt lubrication
Published 2012“…The in situ profiles of the piston skirt and cylinder bore surface are subject to thermo-elastic global deformation due to differential operating temperatures and forces1. …”
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Coupled elastodynamics of piston compression ring subject to sweep excitation
Published 2017“…There have been a plethora of investigations for ring dynamics, often decoupling the ring behaviour in its in-plane and out-of-plane motions. …”
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A multi-physics, multi-scale investigation of the piston ring pack
Published 2017“…It is essential for the automotive industry to improve efficiency and mitigate frictional losses in IC engines. About 20-25% of these frictional losses arise as a result of the piston ring pack-liner assembly. …”
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Characterisation of intermetallic phases in multicomponent Al-Si alloys for piston applications
Published 2006“…In order for such alloys to meet increasingly demanding operational requirements, such as higher service temperatures and pressures, multicomponent Al-Si alloys, which contain several other alloying additions (Cu, Ni, Mg, Mn and Fe), have been used to further enhance the high temperature strength and fatigue resistance. …”
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Tribological enhancement of piston skirt conjunction using graphene-based coatings
Published 2020“…The conjunction and system level performance of these coatings considering both boundary and viscous friction and system dynamics are then evaluated using a multi-physics tribo-dynamic model. Results show that by incorporating an appropriate GO coating, the frictional power loss of the piston skirt to cylinder liner conjunction can be improved by up to 14% whilst maintaining the wear resistance of the coating at the level of an uncoated steel surface.…”
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Schematic diagram of the working parts of a reciprocating piston hand pump
Published 2019“…Schematic diagram of the working parts of a reciprocating piston hand pump…”
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Transient thermo elastohydrodynamics of piston compression ring-cylinder liner contact
Published 2008“…This could be as high as 45% of it. A typical piston assembly consists of a compression ring, a scraper ring and an oil ring mounted on the piston body. …”
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A tribo-dynamic solution for the flexible piston skirt and liner conjunction
Published 2013“…Of the energy supplied to the engine as a whole approximately 17% is lost by means of mechanical friction. …”
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Meniscus formation in the piston compression ring-cylinder liner inlet zone
Published 2012“…Whilst, these are the main reasons for failure to form a coherent lubricant film at dead centre reversals, poor hydrodynamic lubrication can also occur elsewhere in the piston cycle due to the lack of an inlet meniscus. …”
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CFD modelling of cavitation phenomenon in piston ring / cylinder liner conjunction
Published 2013“…CFD modelling of cavitation phenomenon in piston ring / cylinder liner conjunction…”
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Thermoelastohydrodynamics of a rough piston compression ring-to-cylinder bore conjunction
Published 2011“…A thermo-elastohydrodynamic analysis of piston compression ring conjunction is presented. …”
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Passive control of piston secondary motion using nonlinear energy absorbers
Published 2017“…The impulsive behaviour of the piston in the cylinder liner plays a key role in the Noise, Vibration and Harshness (NVH) of internal combustion engines. …”
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Optimised textured surfaces with application in piston-ring/cylinder liner contact
Published 2010“…The application of textured surfaces in tribology has recently gained a huge momentum. In this chapter, a systematic approach to investigate the maximum outcomes from employing such surfaces is introduced with an insight into their application in internal combustion engines. …”
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Effect of cylinder deactivation on tribological performance of piston compression ring and connecting rod bearing
Published 2018Subjects: Get full text
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The effect of cylinder liner operating temperature on frictional loss and engine emissions in piston ring conjunction
Published 2017Subjects: Get full text
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On the role of friction modifier additives in the oil control ring and piston liner contact
Published 2024Get full text
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Simulation and development of linear single-piston balanced compressor in Stirling cryogenic cooler
Published 2003Get full text
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Performance evaluation of piston compression ring through accelerated wear in engine tests
Published 2012“…Both the piston ring and cylinder bore experience wear throughout their life cycle. …”
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Friction reduction in piston ring cylinder liner contact using textured surfaces
Published 2014“…The compression ring-bore conjunction is responsible for consuming almost 5% of fuel energy. One intensely researched area is enhancement of tribological performance through surface texturing of contacting solid surfaces in order to retain micro-reservoirs of lubricant in regions which are prone to poor lubrication, for example in piston-cylinder system [1,2]. …”
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Analytical evaluation of fitted piston compression ring modal behaviour and frictional assessment
Published 2011“…There is also the radial inward force as the result of ring-bore conjunctional pressure (i.e. contact force). Under transient conditions, the inward and outward forces do not equilibrate, resulting in the small inertial radial motion of the ring. …”
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Transient tribo-dynamics of thermo-elastic compliant high-performance piston skirts
Published 2014“…Contact loads of the order of 5 kN and contact kinematics in the range 0–35 m/s result in harsh transient tribological conditions. …”
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On the identification of piston slap events in internal combustion engines using tribodynamic analysis
Published 2014“…Thus, the inertia and reaction forces developed in the piston are calculated. The occurrence of piston slap events in the engine cycle is monitored by introducing six alternative concepts: (i) the quasi-static lateral force, (ii) the transient lateral force, (iii) the minimum film thickness occurrence, (iv) the maximum energy transfer, (v) the lubricant squeeze velocity and (vi) the piston-impact angular duration. …”
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Analytical evaluation of fitted piston compression ring: modal behaviour and frictional assessment
Published 2011“…There is also the radial inward force as the result of ring-bore conjunctional pressure (i.e. contact force). Under transient conditions, the inward and outward forces do not equilibrate, resulting in the small inertial radial motion of the ring. …”
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Research and development on traditional water lifting devices: endless piston water pump
Published 2006“…The research work resulted in developing and modifying the traditional device to a considerable extent. The newly designed pump, named as the Endless Piston Water Pump (EPWP) delivers 100% more water at the expense of 50% less energy than the traditional pump. …”
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Investigation of reciprocating conformal contact of piston skirt and ring-pack to cylinder liner under transient condition
Published 2003“…This paper presents an investigation of piston lubrication combining the ring pack in order to study if sufficient lubricant film is formed during reversal at TDC and combustion.…”
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