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The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

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Low-Engine-Friction Technology for Advanced Natural Gas Reciprocating Engines. (Annual Technical Progress Report, June 1, 2004-June 30, 2005).

DE2006862407

Publication Date	2005
Personal Author	Wong, V.; Tian, T.; Moughon, L.; Takata, R.; Jocsak, J.
Page Count	132
Abstract	This program aims at improving the efficiency of advanced natural-gas reciprocating engines (ANGRE) by reducing piston and piston ring assembly friction without major adverse effects on engine performance, such as increased oil consumption and wear. An iterative process of simulation, experimentation and analysis is being followed towards achieving the goal of demonstrating a complete optimized low-friction engine system. To date, a detailed set of piston and piston-ring dynamic and friction models have been developed and applied that illustrate the fundamental relationships between design parameters and friction losses. Low friction ring designs have already been recommended in a previous phase, with full-scale engine validation partially completed.
Keywords	Reciprocating engines Natural gas Friction Engine performance Pistons Consumption Adverse effects Testing Computerized simulation Efficiency Design Low friction engine systems
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Massachusetts Inst. of Tech., Cambridge.; National Energy Technology Lab., Pittsburgh, PA.
Supplemental Notes	Sponsored by National Energy Technology Lab., Pittsburgh, PA.
Document Type	Technical Report
NTIS Issue Number	200617

Low-Engine-Friction Technology for Advanced Natural Gas Reciprocating Engines. (Annual Technical Progress Report, June 1, 2004-June 30, 2005).

Low-Engine-Friction Technology for Advanced Natural Gas Reciprocating Engines. (Annual Technical Progress Report, June 1, 2004-June 30, 2005).
DE2006862407

Publication Date	2005
Personal Author	Wong, V.; Tian, T.; Moughon, L.; Takata, R.; Jocsak, J.
Page Count	132
Abstract	This program aims at improving the efficiency of advanced natural-gas reciprocating engines (ANGRE) by reducing piston and piston ring assembly friction without major adverse effects on engine performance, such as increased oil consumption and wear. An iterative process of simulation, experimentation and analysis is being followed towards achieving the goal of demonstrating a complete optimized low-friction engine system. To date, a detailed set of piston and piston-ring dynamic and friction models have been developed and applied that illustrate the fundamental relationships between design parameters and friction losses. Low friction ring designs have already been recommended in a previous phase, with full-scale engine validation partially completed.
Keywords	Reciprocating engines Natural gas Friction Engine performance Pistons Consumption Adverse effects Testing Computerized simulation Efficiency Design Low friction engine systems
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Massachusetts Inst. of Tech., Cambridge.; National Energy Technology Lab., Pittsburgh, PA.
Supplemental Notes	Sponsored by National Energy Technology Lab., Pittsburgh, PA.
Document Type	Technical Report
NTIS Issue Number	200617