Lubricant properties in the diesel engine piston ring zone

1993 ◽  
pp. 171-175
Author(s):  
G.P. Richard
Keyword(s):  
Diesel Engine ◽  
Piston Ring ◽  
Engine Piston ◽  
Ring Zone

Development of High Temperature Diesel Engine Piston Ring and Cylinder Liner Tribology

2003 ◽  
Author(s):  
Lloyd Kamo ◽  
Philipe Saad ◽  
Rudolf Mnatsakanov ◽  
Walter Bryzik ◽  
Milad Mekari
Keyword(s):  
High Temperature ◽  
Diesel Engine ◽  
Piston Ring ◽  
Cylinder Liner ◽  
Engine Piston

Technique for Experimental Evaluation of Piston Ring—Cylinder Film Thickness

1983 ◽  
Vol 105 (3) ◽  
pp. 353-360 ◽  
Author(s):  
T. A. Dow ◽  
C. A. Schiele ◽  
R. D. Stockwell
Keyword(s):  
Diesel Engine ◽  
Film Thickness ◽  
Analytical Model ◽  
Measurement Technique ◽  
Piston Ring ◽  
Full Size ◽  
Engine Piston ◽  
Piston Speed ◽  
Lubrication Conditions ◽  
Lubricant Viscosity

A technique for estimating the piston ring film thickness by measuring the ring end gap has been developed. This paper discusses the details of the measurement technique, presents the results of a parametric study of the measured film thickness for unpressurized full-size diesel engine piston rings and compares those results with an analytical model. The film thickness is shown to depend upon the lubricant viscosity, the piston speed, the ring face profile and the quantity of lubricant available to the ring. The results of an analytical model, which assumes flooded lubrication conditions is also presented and the resulting film thicknesses are similar to those measured.

Experimental Study on Wear Monitoring of Marine Diesel Engine’s Piston Ring by Magnetoresistive Sensor

2012 ◽  
Vol 424-425 ◽  
pp. 132-136
Author(s):  
Guo Jin Chen ◽  
Zhang Ming Peng ◽  
Jian Guo Yang ◽  
Qiao Ying Huang
Keyword(s):  
Diesel Engine ◽  
Large Scale ◽  
Piston Ring ◽  
Test Bed ◽  
Operating Modes ◽  
Magnetoresistive Sensor ◽  
Marine Diesel ◽  
Wear Monitoring ◽  
Oil Tanker ◽  
Test Result

On the diesel engine’s test bed, this paper has studied the parameters regarding the diesel engine’s rotational speed, the piston ring’s width and wearing capacity and so on, and their relation with the output signal of the magnetoresistive sensor under the reverse drawing of the diesel engine. The research discovered that the piston ring’s wear and the magnetoresistive sensor’s output have the corresponding relationship. And on the oil tanker with the 6RTA52U diesel engine, the influence of the diesel engine’s operating parameters and the load situations to the magnetoresistive sensor’s output is surveyed under four kinds of different operating modes. The test result and the research conclusion provide the technical foundation for the online Wear monitoring of the large-scale marine diesel engine’s piston ring.

Microcharacterization of heavy-duty diesel engine piston deposits

2002 ◽  
Vol 33 (3) ◽  
pp. 259-268 ◽  
Author(s):  
G. C. Smith ◽  
A. B. Hopwood ◽  
K. J. Titchener
Keyword(s):  
Diesel Engine ◽  
Heavy Duty ◽  
Engine Piston ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel

The analyses of frictional losses and thermal stresses in a diesel engine piston coated with different thicknesses of thermal barrier films using co-simulation method

2021 ◽  
pp. 146808742110656
Author(s):  
Fatma Bayata ◽  
Cengiz Yildiz
Keyword(s):  
Diesel Engine ◽  
Coating Thickness ◽  
Thermal Stresses ◽  
Equivalent Stress ◽  
Simulation Method ◽  
Thermal Barrier ◽  
Barrier Films ◽  
Engine Piston ◽  
Frictional Performance ◽  
Artificial Neural Network Ann

This study comparatively presents the thermal and mechanical effects of different Thermal Barrier Coatings (TBCs) and their thicknesses on the performance of aluminum diesel engine piston by combining Finite Element Analyses (FEA) and Artificial Neural Network (ANN) methods. The piston structure of MWM TbRHS 518S indirect injection six-cylinder diesel engine was modeled. The clustered TBCs (NiCrAlY–Gd2Zr2O7, NiCrAlY–MgO-ZrO2, NiCrAl–Yttria Partially Stabilized Zirconia (YPSZ), and NiCrAlY–La2Zr2O7) were implemented to the related surface of aluminum alloy piston and then static, thermal, and transient structural FEA were conducted for each model. Based on both of the temperature and equivalent stress distributions, NiCrAlY–Gd2Zr2O7 coated model displayed the best performance. Additionally, the effects of top coating thicknesses of TBCs were investigated in the range of 0.1–1.0 mm with 0.1 mm increments in FEAs. The thermally effective top coating thickness was predicted as 0.95 mm for the selected TBC using ANN method. Then the effects of coating thickness on frictional performance were revealed by generating transient structural FE models and utilizing stribeck diagram. The uncoated and 0.95 mm NiCrAlY–Gd2Zr2O7 coated models were adjusted as transient and the related crank angle – dependent in-cylinder combustion pressure data was implemented. The friction force was reduced by at least 15% in NiCrAlY–Gd2Zr2O7 coated model.

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