Download or read book Analysis of Lubricant Film Thickness and Distribution Along the Piston ring liner Interface in a Reciprocating Engine written by Steven Michael Casey and published by . This book was released on 1998 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Techniques Applied to Fluid Mechanics written by Ronald J. Adrian and published by Springer Science & Business Media. This book was released on 2000 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the tradition of its predecessors, this volume comprises a selection of the best papers presented at the Ninth International Symposium on Applications of Laser Techniques to Fluid Mechanics, held in Lisbon in July 2000. The papers reflect the state-of-the-art in laser applications of laser techniques in fluid mechanics describing novel ideas for instrumentation, instrumentation developments, results of measurements of wall-bounded flows, free flows and flames and flow and combustion in engines. The papers demonstrate the continuing interest in the development of an understanding of new methodologies and implementation in terms of new instrumentation.
Download or read book Proceedings of the 1998 Fall Technical Conference of the ASME Internal Combustion Engine Division written by American Society of Mechanical Engineers. Internal Combustion Engine Division. Technical Conference and published by . This book was released on 1998 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Piston Ring Thermal Transient Effects on Lubricant Temperatures in Advanced Engines written by Michael E. Boisclair and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: One class of advanced diesel engines operates with low heat rejection and high operating temperatures; piston-ring / liner lubrication is a major problem for these engines. This study attempts to illustrate the time-dependent thermal environment around the top piston ring and lubricant in these advanced engines. Particular emphasis will be placed on the maximum lubricant temperature. The analysis starts with a standard cycle simulation and a global finite-element analysis of the piston and liner in relative motion. A more detailed finite-element model, which considers variable oil film thickness on the liner, focuses on the top ring and lubricant and uses the groove and liner temperatures generated in the global analysis as boundary conditions. Results for different heat rejection engine configurations are presented. We observe that because of major transient effects, high lubricant temperature is experienced not only at top ring reversal but also down the liner to bottom ring reversal.
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 Engine Lubricants Effects of Fuels Lubricants on Automotive Devices and Lubricant Applications New Test Methods written by and published by . This book was released on 2004 with total page 258 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 Effects of Piston Design and Lubricant Selection on Reciprocating Engine Friction written by Luke Frank Moughon and published by . This book was released on 2006 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) Moreover, increasing oil supply (i.e., increasing effective oil film thickness) tends to decrease net friction by promoting hydrodynamic lubrication. Changes to piston geometry were shown to have significant effects on friction. In order to maximize hydrodynamic support, the pressure must be distributed evenly across the piston skirt; this can be achieved by making the skirt-liner clearance as even and smooth as possible. The model confirmed that skirt profiles with gentle slopes tend to reduce net friction, as do skirt ovality values that closely approximate the shape of the liner. Moreover, the grooves machined into the skirt surface were shown to have a deleterious effect on friction if their amplitude was large relative to the thickness of the oil film. Using relatively small-amplitude grooves facilitates oil movement and retention without leading to direct contact with the liner. After piston geometry has been optimized to promote hydrodynamic lubrication, further refinements, such as reducing oil viscosity, are possible.
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 Measurement and Analysis of Piston Inter ring Pressures and Oil Film Thickness and Their Effects on Engine Oil Consumption written by L. Bouke Noordzij and published by . This book was released on 1996 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrasonic Measurement of Lubricant Films Generated at the Piston cylinder Interface of Internal Combustion Engines written by Robin Mills and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Internal combustion engines are perhaps the most ubiquitous power source in the modern world. Their heavy use in the vehicle industry and the current impetus to improve efficiency whilst reducing emissions means that OEMs are driving research to provide cleaner and 'greener' engines. Though significant effort is being channelled into teasing out improvements in thermodynamic Efficiency by such methods as pressure boosting and power management. the nature of an engine means many moving parts contribute to parasitic frictional loss. Of these interfaces. the reciprocating contacts between cylinder. piston rings and skirt are arguably subject to the most demanding tribological conditions within an engine. required to seal against the high temperature' combustion gases whilst supporting the large side loading inherent to the system. Given that the piston of an engine may perform this action hundreds of millions of times in its lifespan. the lubrication strategy and component design is of key importance in minimising wear frictional losses. Though the use of numerical simulation tools for improving design has seen significant growth as computational capabilities improve and provide cost advantages to full scale testing. robust validation methods are required to guide the development of the underlying models. The aim of this project was to assess the suitability of an ultrasonic method to monitor the condition of lubrication at the aforementioned contacts by measuring film thickness. Though various techniques involving optical and electrical principles have been employed in the past they generally require the cylinder of the engine to be penetrated and implementation. for the most part. is limited to the test cell. The results of investigations at the piston ring contact have shown that the ultrasonic technique can be used to measure lubricant film thickness and have shown the influence of cylinder pressure and reciprocating speed. Measurements correlate well with work by other authors using the alternative methods mentioned. giving confidence in the robustness of the method. Film measurements at the skirt have been also been successful. not only in quantifying the minimum films present. but also in detailing the profile of the film over its surface and enabling some of the secondary motions of the piston to be deduced. It has been shown that the ultrasonic technique offers the ability and freedom to measure film thickness within an operational engine whilst having the distinct advantage of limiting the degree structural modification required. It shows promise as a research tool and with further development. offers the potential to be incorporated into a lubricant monitoring and control System to help reduce friction losses and emissions.
Download or read book An Experimental Measurement of Oil Film Thickness on the Liner of a Motored Diesel Engine Using a Laser Induced Fluorescence Technique and Fiber Optics written by Robert V. Phen and published by . This book was released on 1992 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of Piston Distortion on Lubrication in a Reciprocating Engine written by William L. Blair and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Test Method to Evaluate Cylinder Liner Piston Ring Coatings for Advanced Heat Engines written by Kevin C. Radil and published by . This book was released on 1997 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A tribological test method has been developed to assess candidate high temperature piston ring and cylinder liner coatings for advanced heavy duty diesel engines. A reciprocating test rig is employed to reproduce the boundary lubricated conditions existing at the piston ring-cylinder liner interface during top ring reversal (TRR). The test specimens are fabricated from commercially available piston rings and cylinder liners to facilitate direct comparisons with current diesel engines. A data acquisition system is used to collect coefficient of friction values. Coating performance is based upon calculated volumetric wear factors of the ring and liner as well as the friction coefficient. Baseline tests were conducted with chrome coated piston rings sliding on pearlitic gray cast iron cylinder liners while in the presence of a fully formulated engine oil. Friction measurements exhibited excellent repeatability throughout the entire test with average values ranging from 0.079 to 0.082. The mean of the ring and liner wear factors was 7.28 x 10 to the minus 10th power mm 3/N̂m and 2.62xl0 to the minus 8th power mm3/N̂m, respectfully and are in good agreement with values reported in the literature. These results indicate that the test method is capable of reproducing TRR conditions at the ring-liner interface of a diesel engine.
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 Piston Ring Friction Analysis from Oil Film Thickness Measurements written by Eric Joseph Deutsch and published by . This book was released on 1994 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
