Controllable Lubrication for Main Engine Bearings Using Mechanical and Piezoelectric Actuators

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Controllable Lubrication for Main Engine Bearings Using Mechanical and Piezoelectric Actuators. / Estupinan, Edgar; Santos, Ilmar.

In: I E E E - A S M E Transactions on Mechatronics, Vol. 17, No. 2, 2012, p. 279-287.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Author

Estupinan, Edgar; Santos, Ilmar / Controllable Lubrication for Main Engine Bearings Using Mechanical and Piezoelectric Actuators.

In: I E E E - A S M E Transactions on Mechatronics, Vol. 17, No. 2, 2012, p. 279-287.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{4c0722c9e1584463b8bcf3ef9aaaa999,
title = "Controllable Lubrication for Main Engine Bearings Using Mechanical and Piezoelectric Actuators",
keywords = "Active lubrication, Piezoelectric actuator, Mechatronic system, Combustion engines",
publisher = "I E E E",
author = "Edgar Estupinan and Ilmar Santos",
year = "2012",
doi = "10.1109/TMECH.2010.2099663",
volume = "17",
number = "2",
pages = "279--287",
journal = "I E E E - A S M E Transactions on Mechatronics",
issn = "1083-4435",

}

RIS

TY - JOUR

T1 - Controllable Lubrication for Main Engine Bearings Using Mechanical and Piezoelectric Actuators

A1 - Estupinan,Edgar

A1 - Santos,Ilmar

AU - Estupinan,Edgar

AU - Santos,Ilmar

PB - I E E E

PY - 2012

Y1 - 2012

N2 - Although mechatronic systems are nowadays implemented in a large number of systems in vehicles, active lubrication systems are still incipient in industrial applications. This study is an attempt to extend the active lubrication concept to combustion engines and gives a theoretical contribution to this field. One refers to active lubrication when conventional hydrodynamic lubrication is combined with dynamically modified hydrostatic lubrication. In this study, two different schemes for the oil injection system in actively lubricated main engine bearings are presented. The use of active lubrication in journal bearings helps to enhance the hydrodynamic fluid film by increasing the fluid film thickness and consequently reducing viscous friction losses and vibrations. In this study, the hydrostatic lubrication is modified by injecting oil at controllable pressures through orifices circumferentially located around the bearing surface. The main equations that govern the dynamics of the injection for a piezo-actuated oil injector and a mechanical-actuated oil injector are presented. It is shown how the dynamics of the oil injection system is coupled to the dynamics of the bearing fluid film through equations. The global system is numerically solved using as a case study a single-cylinder combustion engine, where the conventional lubrication of the main bearing is modified by applying radial oil injection using piezo-actuated injection. The performance of such a hybrid bearing is compared to an equivalent conventional lubricated bearing in terms of the maximum fluid film pressures, minimum fluid film thicknesses, and reduction of viscous friction losses.

AB - Although mechatronic systems are nowadays implemented in a large number of systems in vehicles, active lubrication systems are still incipient in industrial applications. This study is an attempt to extend the active lubrication concept to combustion engines and gives a theoretical contribution to this field. One refers to active lubrication when conventional hydrodynamic lubrication is combined with dynamically modified hydrostatic lubrication. In this study, two different schemes for the oil injection system in actively lubricated main engine bearings are presented. The use of active lubrication in journal bearings helps to enhance the hydrodynamic fluid film by increasing the fluid film thickness and consequently reducing viscous friction losses and vibrations. In this study, the hydrostatic lubrication is modified by injecting oil at controllable pressures through orifices circumferentially located around the bearing surface. The main equations that govern the dynamics of the injection for a piezo-actuated oil injector and a mechanical-actuated oil injector are presented. It is shown how the dynamics of the oil injection system is coupled to the dynamics of the bearing fluid film through equations. The global system is numerically solved using as a case study a single-cylinder combustion engine, where the conventional lubrication of the main bearing is modified by applying radial oil injection using piezo-actuated injection. The performance of such a hybrid bearing is compared to an equivalent conventional lubricated bearing in terms of the maximum fluid film pressures, minimum fluid film thicknesses, and reduction of viscous friction losses.

KW - Active lubrication

KW - Piezoelectric actuator

KW - Mechatronic system

KW - Combustion engines

U2 - 10.1109/TMECH.2010.2099663

DO - 10.1109/TMECH.2010.2099663

JO - I E E E - A S M E Transactions on Mechatronics

JF - I E E E - A S M E Transactions on Mechatronics

SN - 1083-4435

IS - 2

VL - 17

SP - 279

EP - 287

ER -