scholarly journals Engine Friction and Wear Performances with Polyalkylene Glycol Engine Oils

2016 ◽  
Author(s):  
John Cuthbert ◽  
Arup Gangopadhyay ◽  
Larry Elie ◽  
Z. Liu ◽  
Douglas Mcwatt ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Engine Oils ◽  
Polyalkylene Glycol ◽  
Engine Friction

Valvetrain Friction and Wear Performance of Polyalkylene Glycol Engine Oils

2017 ◽  
Vol 61 (1) ◽  
pp. 133-143 ◽  
Author(s):  
A. Gangopadhyay ◽  
D. G. McWatt ◽  
R. J. Zdrodowski ◽  
S. J. Simko ◽  
S. L. Peczonczyk ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Wear Performance ◽  
Engine Oils ◽  
Polyalkylene Glycol

Friction and Wear Reduction Mechanism of Polyalkylene Glycol-Based Engine Oils

2018 ◽  
Vol 61 (4) ◽  
pp. 621-631 ◽  
Author(s):  
A. Gangopadhyay ◽  
Z. Liu ◽  
S. J. Simko ◽  
S. L. Peczonczyk ◽  
J. B. Cuthbert ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Reduction Mechanism ◽  
Engine Oils ◽  
Polyalkylene Glycol ◽  
Wear Reduction

Experimental Research on Diesel Engine Friction and Wear Based on Ferrographic Analysis

2015 ◽  
Vol 778 ◽  
pp. 195-198 ◽  
Author(s):  
Hai Bing Xiao
Keyword(s):  
Diesel Engine ◽  
Wear Mechanism ◽  
Friction And Wear ◽  
Test Bench ◽  
Particle Morphology ◽  
Wear Particle ◽  
Engine Test Bench ◽  
Experimental Scheme ◽  
Wear Monitoring ◽  
Engine Friction

This paper deals with the study of diesel engine friction and wear. The friction and wear mechanism of diesel engine was studied and the wear factors of diesel engine friction and wear was analyzed. According to the diesel engine test bench, diesel engine experimental scheme of oil testing was designed during running-in stage. Studies have shown that wear particle morphology of diesel engine from ferrographic analysis can reflect the degree of wear and wear mechanism during running-in stage, wear particle changed during running-in stage. Ferrographic monitoring is an effective method for diesel engine friction and wear monitoring.

Tribological Characteristics of Coated Vane Surfaces Under Mixed Environments of Various Oils and CO2 as a Refrigerant

2005 ◽  
Author(s):  
Se-Doo Oh ◽  
Kyung-Soo Kim ◽  
Sung-Oug Cho ◽  
Young-Ze Lee
Keyword(s):  
High Pressure ◽  
Friction And Wear ◽  
Hard Coatings ◽  
Tribological Characteristics ◽  
Rotary Compressor ◽  
Wear Volume ◽  
Test Results ◽  
Sliding Surfaces ◽  
Polyalkylene Glycol ◽  
Air Conditioning Systems

The CO2 is investigated as an alternative refrigerant to replace HFC refrigerant in air conditioning systems due to the environmental concerns. Because new compressors with CO2 are going to be operated under the high pressure, the tribology of sliding surfaces in the compressor becomes very important. To develop new compressor, especially rotary type, the friction and wear characteristics of sliding surfaces between a vane and a roller in the rotary compressor were evaluated in this paper. Several hard coatings, such as TiN, CrN, WC/C and two types of nitridings, were applied on vane surfaces in order to improve the tribological characteristics, and their performances were evaluated experimentally. Two types of lubricants were used, namely POE (polyol ester) oil and PAG (polyalkylene glycol) oil. The vane-on-disk type sliding tests were performed with an exclusive high pressure wear tester. From the tests, coefficient of friction and wear volume of vane surfaces applied various coatings were compared. Test results showed that WC/C coatings showed good tribological properties. TiN and CrN coated vanes showed good wear resistance properties but produced high friction. Also, the results of the sliding tests showed that using PAG oil has an advantage over POE oil in CO2 environment.

scholarly journals MoDTC Tribochemistry in Steel/Steel and Steel/Diamond-Like-Carbon Systems Lubricated With Model Lubricants and Fully Formulated Engine Oils

2018 ◽  
Vol 141 (1) ◽  
Author(s):  
Cayetano Espejo ◽  
Benoît Thiébaut ◽  
Frédéric Jarnias ◽  
Chun Wang ◽  
Anne Neville ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Friction Reduction ◽  
Diamond Like Carbon ◽  
Additive Package ◽  
Friction Behavior ◽  
Engine Oils ◽  
Steel Surfaces ◽  
Friction Performance ◽  
Underlying Mechanisms ◽  
First Time

This work focuses on the tribochemistry of molybdenum dithiocarbamate (MoDTC) oil additive to improve friction behavior of diamond-like-carbon (DLC) coated systems lubricated in boundary regime. Raman microscopy has been used to investigate surface tribolayers formed on coated (hydrogenated a-C:H and non-hydrogenated ta-C) and steel surfaces when lubricated with model lubricants and commercial engine oils. The effect of the additive package and the type of DLC played a crucial role in the development and composition of the tribolayer and the friction performance. The additive package contained in the fully formulated (FF) oils limited the friction reduction capabilities of MoDTC additive for every material pair. Accelerated a-C:H coating wear related to MoDTC tribochemistry was found. For the first time, it has been shown that a distinctive MoS2-containing tribolayer can be formed on the ta-C surface, leading to a coefficient of friction lower than 0.04. The underlying mechanisms of MoDTC/surface interactions and their effect on friction and wear are discussed.

Experimental Investigation on Friction and Wear of Coated Vane under the Environments of Lubricants and CO2 as a Refrigerant

2006 ◽  
Vol 326-328 ◽  
pp. 1185-1188 ◽  
Author(s):  
Se Doo Oh ◽  
Kyu Sun Lee ◽  
Jin Sun Kim ◽  
Sung Oug Cho ◽  
Young Ze Lee
Keyword(s):  
High Pressure ◽  
Friction And Wear ◽  
Hard Coatings ◽  
Rotary Compressor ◽  
Test Results ◽  
Sliding Surfaces ◽  
Polyalkylene Glycol ◽  
Air Conditioning Systems ◽  
Crn Coatings ◽  
Rotary Type

The CO2 was investigated as an alternative refrigerant to replace HFC (hydrofluorocarbons) refrigerant in air conditioning systems due to the environmental concerns. Because new compressors with CO2 are going to be operated under the high pressure, the tribology of sliding surfaces in the compressor becomes very important. To develop new compressor, especially rotary type, the friction and wear characteristics of sliding surfaces between a vane and a roller in the rotary compressor were evaluated in this paper. Several hard coatings, such as TiN, CrN and WC/C, were applied on vane surfaces in order to improve the tribological characteristics, and their performances were evaluated experimentally. Two types of lubricants were used, namely POE (polyol ester) oil and PAG (polyalkylene glycol) oil. The vane-on-disk type sliding tests were performed with an exclusive high pressure wear tester. From the tests, wear volumes of vane surfaces applied various coatings were compared. Test results showed that WC/C and CrN coatings showed good tribological properties. Also, the results of the sliding tests showed that using PAG oil has an advantage over POE oil in CO2 environment.

Friction and Wear of Low-Phosphorus Engine Oils with Additional Molybdenum and Boron Compounds, Measured on a Reciprocating Lubricant Tester

2008 ◽  
Vol 51 (5) ◽  
pp. 659-672 ◽  
Author(s):  
Peggy Lin ◽  
Gary Barber ◽  
Qian Zou ◽  
Alan H. Anderson ◽  
Simon Tung ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Boron Compounds ◽  
Engine Oils ◽  
Low Phosphorus
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