Download or read book Hydrodynamic Pressure and Oil Film Thickness Between Piston Ring and Liner written by S. R. Brown and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oil Film Thickness Between Top Piston Ring and Engine Liner Near Ring Reversal of a Single Cylinder S I Engine written by Laurence Lee and published by . This book was released on 1995 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tribology of Reciprocating Engines written by D. Dowson and published by Elsevier. This book was released on 2017-05-04 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tribology of Reciprocating Engines documents the proceedings of the 9th Leeds-Lyon Symposium on Tribology held at the University of Leeds, England on September 7-10, 1982. This book emphasizes advances in the working principals of the tribological components that operate with relative motion. The topics discussed include the dynamic analysis of engine bearing systems, measurement of oil film thickness in diesel motor main bearings, and temperature variations in crankshaft bearings. The theoretical and experimental study of ring-liner friction, tribology in the cylinders of reciprocating compressors, and lubricant properties in the diesel engine piston ring zone are also described. This text likewise considers the metallurgy of scoring and scuffing failure, impact of oil contamination on wear and energy losses, and role of tappet surface morphology and metallurgy in cam/tappet life. This compilation is a good reference for triblogists, lubrication engineers, and specialists researching on reciprocating engines.
Download or read book The Effect of Surface Finish on Piston Ring pack Performance in Advanced Reciprocating Engine Systems written by Jeffrey Alan Jocsak and published by . This book was released on 2005 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) The smaller angle decreased friction by blocking lubricant flow transport between the ring and liner thereby increasing the lubricant's effective viscosity and the effective lubricant film thickness between the ring and liner. Both of these effects enabled more ring load to be supported by hydrodynamic pressure, reducing ring-pack friction. There are potential adverse effects related to these surface finish modifications including an increase in the engine's susceptibility to scuffing, and an increase in oil consumption. Nonetheless, these modifications in surface finish reduce predicted ring-pack friction by approximately 1-10%.
Download or read book Analysis of Piston Ring Lubrication with the Power law Lubricant written by Sindur P. Mangkoesoebroto and published by . This book was released on 1992 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Factors Affecting the Top Ring Oil Film Thickness at Top Center written by John E. Myers and published by . This book was released on 1989 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tribology and Dynamics of Engine and Powertrain written by Homer Rahnejat and published by Elsevier. This book was released on 2010-09-30 with total page 1059 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tribology, the science of friction, wear and lubrication, is one of the cornerstones of engineering’s quest for efficiency and conservation of resources. Tribology and dynamics of engine and powertrain: fundamentals, applications and future trends provides an authoritative and comprehensive overview of the disciplines of dynamics and tribology using a multi-physics and multi-scale approach to improve automotive engine and powertrain technology.Part one reviews the fundamental aspects of the physics of motion, particularly the multi-body approach to multi-physics, multi-scale problem solving in tribology. Fundamental issues in tribology are then described in detail,from surface phenomena in thin-film tribology, to impact dynamics, fluid film and elastohydrodynamic lubrication means of measurement and evaluation. These chapters provide an understanding of the theoretical foundation for Part II which includes many aspects of the physics of motion at a multitude of interaction scales from large displacement dynamics to noise and vibration tribology, all of which affect engines and powertrains. Many chapters are contributed by well-established practitioners disseminating their valuable knowledge and expertise on specific engine and powertrain sub-systems. These include overviews of engine and powertrain issues, engine bearings, piston systems, valve trains, transmission and many aspects of drivetrain systems. The final part of the book considers the emerging areas of microengines and gears as well as nano-scale surface engineering.With its distinguished editor and international team of academic and industry contributors, Tribology and dynamics of engine and powertrain is a standard work for automotive engineers and all those researching NVH and tribological issues in engineering. Reviews fundamental aspects of physics in motion, specifically the multi-body approach to multi physics Describes essential issues in tribology from surface phenomena in thin film tribology to impact dynamics Examines specific engine and powertrain sub-systems including engine bearings, piston systems and value trains
Download or read book Piston Ring Scuffing written by Institution of Mechanical Engineers (Great Britain). Tribology Group and published by Institution of Mechanical Engineers. This book was released on 1976 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of the Factors that Influence the Lubrication of the Three piece Oil Control Ring written by Yuwei Li (S.M.) and published by . This book was released on 2017 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oil control ring (OCR) is arguably the most important component of the piston ring pack system in internal combustion engines. The OCR regulates the oil supply to the top two rings and therefore is critical to both lubricating oil consumption and friction generation. Three-piece oil control ring (TPOCR) is widely used in gasoline engines. However, there lacks a coherent understanding of the functional behavior of the TPCOR in practice due to its complex nature and the shortage of the research effort. The present work is aimed at improving the robustness and the accuracy of a previously developed model for the dynamics and the lubrication of the TPOCR. First, the robustness of the present TPOCR model was improved by modifying the initial guess of the globally convergent Newton's method. The roughness truncation method was applied to the model to improve the accuracy of the model. A correlation between the integrated hydrodynamic pressure and the rail/liner clearance was developed to replace the numerical calculation. Then, to provide more realistic modeling results in the next generation of the model, several factors that could influence the lubrication of the TPOCR were studied. Specifically, these factors include the rail profile and the liner roughness. It was found that the unworn region and the liner roughness could have significant impact on the oil film thickness, the hydrodynamic pressure generation, and the friction generation. Corresponding correlation methods were developed to include these factors in the future TPOCR model. Finally, the gas flow pattern in the TPOCR groove was examined as the first step to understand the oil transport inside the OCR. This is the first attempt to resolve the gas and oil flow inside the TPOCR groove. Together with the TPOCR model and the future ring pack model with TPOCR as the OCR, the study of the gas/oil flow should give a complete picture of the function of the TPOCR..
Download or read book The Development and Implementation of Theoretical and Experimental Methods for Studying Oil Films in Engine Cylinders written by Dana E. Richardson and published by . This book was released on 1990 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Conservation Through Fluid Film Lubrication Technology written by Steve M. Rohde and published by . This book was released on 1979 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Analysis of a Fire Ring Wear Model for a Piston Engine written by Yooseok Chung and published by . This book was released on 1992 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Effects of Liner Pores on Piston Ring Lubrication in Internal Combustion Engines written by Jérôme Sacherer and published by . This book was released on 2019 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Automotive manufacturers are increasingly replacing traditional cast iron liners in the internal combustion engines of commercial vehicles with spray-coated liners. While not the original intention, these new, porous liners are suspected to reduce hydrodynamic friction. The interaction of pores with piston ring and liner lubrication is studied in this work. Preliminary computational fluid dynamics simulations are performed on a single, idealized pore geometry, including surface tension but no cavitation due to computational cost limitations. Potential mechanisms for displacement of oil out of the pore are investigated, as this would improve subsequent ring lubrication. Pressure-driven flow is found to dominate this process, though surface tension also has an impact: it can trap air bubbles in the pore and level out accumulated oil back into the evacuated pore. A deterministic model exists to predict hydrodynamic pressure and friction for rough and honed liner surfaces. This model, however, assumes fully flooded boundary conditions. A modification to the governing equation for the regions beyond the full film boundaries is developed by introducing a diffusive velocity profile. The diffusion provides a transition between an oil film on the liner experiencing uniform flow to full film Couette flow. This change enables the large pore geometry to be accommodated by the model without unrealistic premature film attachment all the while maintaining the continuous transition between full film and cavitation. Results from the model indicate that the pore can act as an oil supply, extending the wetting region beneath the ring and consequently allowing for greater pressure generation and larger, desirable load carrying capacity. Cavitation also plays a critical role in the pore interaction; early cavitation in the pore can split the full film region, significantly compromising the load carrying capacity. Cavitation is also found to potentially make use of the pore's oil supply to redistribute oil onto the liner. In general, the pore causes a substantial drop in lift force, increasing the coefficient of friction as a result, though in some cases an extended wetting region can counter this effect.
Download or read book The Running In Process in Tribology written by D. Dowson and published by Elsevier. This book was released on 2016-10-27 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Running-In Process in Tribology is a collection of papers presented during the 8th Leeds-Lyon Symposium on Tribology held in the Institut National des Sciences Appliquées de Lyon, France in September 1981. The symposium was attended by 87 delegates from 13 countries, which showed a great level of interest on the scientific and industrial problems of running-in. Twenty eight papers are presented in the book, covering basic thermodynamics, mechanics of continuous solids, metallurgy, polymers, profilometry, and surface physics. Major topics such as elastohydrodynamics, roughness, and thermal effects in tribology are discussed as well. Mechanical engineers and materials scientists will find the book very insightful.
Download or read book Lubrication Studies at High Power Density Conditions written by Wendell Rafael DelValle and published by . This book was released on 2001 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Automotive Engineering written by and published by John Wiley & Sons. This book was released on 2015-03-23 with total page 3888 pages. Available in PDF, EPUB and Kindle. Book excerpt: Erstmals eine umfassende und einheitliche Wissensbasis und Grundlage für weiterführende Studien und Forschung im Bereich der Automobiltechnik. Die Encyclopedia of Automotive Engineering ist die erste umfassende und einheitliche Wissensbasis dieses Fachgebiets und legt den Grundstein für weitere Studien und tiefgreifende Forschung. Weitreichende Querverweise und Suchfunktionen ermöglichen erstmals den zentralen Zugriff auf Detailinformationen zu bewährten Branchenstandards und -verfahren. Zusammenhängende Konzepte und Techniken aus Spezialbereichen lassen sich so einfacher verstehen. Neben traditionellen Themen des Fachgebiets beschäftigt sich diese Enzyklopädie auch mit "grünen" Technologien, dem Übergang von der Mechanik zur Elektronik und den Möglichkeiten zur Herstellung sicherer, effizienterer Fahrzeuge unter weltweit unterschiedlichen wirtschaftlichen Rahmenbedingungen. Das Referenzwerk behandelt neun Hauptbereiche: (1) Motoren: Grundlagen; (2) Motoren: Design; (3) Hybrid- und Elektroantriebe; (4) Getriebe- und Antriebssysteme; (5) Chassis-Systeme; (6) Elektrische und elektronische Systeme; (7) Karosserie-Design; (8) Materialien und Fertigung; (9) Telematik. - Zuverlässige Darstellung einer Vielzahl von Spezialthemen aus dem Bereich der Automobiltechnik. - Zugängliches Nachschlagewerk für Jungingenieure und Studenten, die die technologischen Grundlagen besser verstehen und ihre Kenntnisse erweitern möchten. - Wertvolle Verweise auf Detailinformationen und Forschungsergebnisse aus der technischen Literatur. - Entwickelt in Zusammenarbeit mit der FISITA, der Dachorganisation nationaler Automobil-Ingenieur-Verbände aus 37 Ländern und Vertretung von über 185.000 Ingenieuren aus der Branche. - Erhältlich als stets aktuelle Online-Ressource mit umfassenden Suchfunktionen oder als Print-Ausgabe in sechs Bänden mit über 4.000 Seiten. Ein wichtiges Nachschlagewerk für Bibliotheken und Informationszentren in der Industrie, bei Forschungs- und Schulungseinrichtungen, Fachgesellschaften, Regierungsbehörden und allen Ingenieurstudiengängen. Richtet sich an Fachingenieure und Techniker aus der Industrie, Studenten höherer Semester und Studienabsolventen, Forscher, Dozenten und Ausbilder, Branchenanalysen und Forscher.
Download or read book Vehicle Tribology written by M. Godet and published by Elsevier. This book was released on 1991-07-03 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vehicle Tribology was chosen as the topic for the 17th Leeds-Lyon Symposium, as it was decided to be a timely opportunity to bring together experts of many disciplines connected with problems of emissions, particulates and energy efficiency associated with the automobile engine. The volume contains 55 papers divided into eighteen sessions.
