Turbocharger Lubrication - Lubricant Behavior and Factors That Cause Turbocharger Failure
Journal Title: International Journal of Automotive Engineering and Technologies - Year 2013, Vol 2, Issue 1
Abstract
This paper is a review of the turbocharger lubrication system and at the same time an attempt to point out and analyze the factors responsible for turbocharger wear, damage and failures. In particular, the conditions under which the lubricant works are presented, from its entrance up to its exit from the turbocharger bearing housing. Additionally, the consequences of failure to comply with the instructions for appropriate turbocharger operation are provided by the various manufacturers. Water cooled turbochargers (for which engine coolant is used), contribute significantly to the reduction of lubricant temperature, in the critical zones of its operation. This is achieved by reducing, the danger of the oil “coking” effect (charred oil residues) or its decomposition, because of high temperature occurring in these zones. Turbochargers shaft support development using semi-floating bush bearings has a significant impact on turbocharger manufacturing cost, as well as on their operational features. Further benefit may be had, when ball bearings are used (usually angular contact bearings are used) for turbocharger shaft support as they provide: a) a reduction of the kinetic friction coefficient, b) reduction of turbocharger lag during turbocharger shaft acceleration from low to high speeds, and c) reduced sealing problems. Regarding the failures that occur in turbochargers, their majority - up to 50% - is caused by problematic lubrication [1]. The rest of the failures are divided between causes related to human factors (such as misuse and inadequate maintenance of a turbocharged vehicle) and external factors such as foreign objects entering either the compressor or turbine housings.
Authors and Affiliations
Dellis Polichronis| Graduate Mechanical Engineer of the National Technical University of Athens, Scientific cooperator of the Higher School of Pedagogical and Technological Education (ASPETE), Retzios Evaggelos| Graduate Mechanical Engineer and Mechanical Engineering Educator of the Higher School of Pedagogical and Technological Education (ASPETE), Geralis Alcibiades| Graduate Mechanical Engineer and Mechanical Engineering Educator of the Higher School of Pedagogical and Technological Education (ASPETE), Gasparakis Elias| Graduate Mechanical Engineer and Mechanical Engineering Educator of the Higher School of Pedagogical and Technological Education (ASPETE), Pesiridis Apostolos*| Lecturer, Brunel University London
Keywords
Related Articles
- EP ID EP3873
- DOI -
- Views 531
- Downloads 36
Performance of single-cylinder compression ignition engine with indigenous castor oil bio diesel
Neat castor oil poses problems when used in CI engine. Problems are reduced to minimum by subjecting the castor oil to transesterification. Castor oil was converted to bio diesel and blended by 5%, 10%, 15% and 20% in qu...
Investigation of the Effect of Using Biodiesel Diesel Engine Fuel System Injectors
In this study, currently used as a fuel in diesel engines instead of diesel fuel, biodiesel from renewable energy sources is used, the mass loss due to wear of diesel engines, injectors, injector opening pressure of diam...
MFFNN and GRNN Models for Prediction of Energy Equivalent Speed Values of Involvements in Traffic Accidents
Accident reconstruction is a scientific study field that depends on analysis, research and drawing. Scientific reconstruction of related traffic accident on computer eliminates making decisions depending on initiative or...
Evolutıon of Traffıc Noise Impacts in Amman, Jordan
Amman, the capital of Jordan has been subjected to persistent increase in road traffic due to overall increase in prosperity, fast development and expansion of economy, travel and tourism leading to the traffic noise bei...
Car Seat Comfort by Measuring Interface Pressure and Using Subjective Evaluation System in Road Trials
This study assesses automobile seat comfort by using a subjective evaluation system with road trials and by measuring seat pressure. The focus of this study is to demonstrate how drivers are affected by seat comfort unde...