Backflow oil transfer in internal combustion engines

Download

119414.pdf

Date

2002

Author

Karkaç, Abdullah

Metadata

Show full item record

Item Usage Stats

220
views

0
downloads

Oil transport through the cylinder piston route has important implications in internal combustion engines. The amount of oil available affects power loss due to friction, wear of cylinder components and piston ring performance. On the other hand, it has been shown that engine oil contributes to burned and unburned hydrocarbon emissions. In this study, the flow of gas and oil through the ring end gaps were modelled. The pressure in the 2nd and 3rd inter-ring land space volumes, the gas mass flow rates at 1st, 2nd and 3rd piston ring end gaps were computed to analyse the blowback oil consumption mechanism. Models for liquid entrainment into the gas flow were integrated to predict oil loss into the gas. The result showed that the oil film thickness affects the backflow oil consumption in the second and third land volumes in internal combustion engines. The calculated oil loss values were found to be 2-3 times greater than oil consumption encountered in operating engines.

Subject Keywords

Internal combustion engines, Oil entrainment, Oil blowback, Oil consumption

URI

https://hdl.handle.net/11511/12706

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Design, construction and testing of a computerized ignition circuit for an internal combustion engine Çakmak, Nevzat; Bayka, Ahmet Demir; Department of Mechanical Engineering (2012) In this study, an ignition unit was designed and constructed for a new design engine with eight cylinders and sixteen pistons. The ignition coils with two high voltage outputs were used to ignite sixteen spark plugs on the system. They were driven by PIC16F628A based igniter circuits triggered with digital signals. The igniter circuits receive ignition signals in a square wave form from a main control circuit; they open or close primary voltage of the induction coils to ignite spark plugs. This main control...
Pyrolysis and Combustion Studies of Fossil Fuels by Thermal Analysis Methods Review Kök, Mustafa Verşan (1995-02-01) Instances where differential scanning calorimetry, thermogravimetry and differential thermal analysis have been applied to study the pyrolysis and combustion behaviour of fossil fuels (peat, lignite, bituminous coals, anthracite, oil shales, crude oils, lignite-oil mixtures, etc.) are reviewed. The literature survey showed that thermal methods were important not only theoretically but also from a practical point of view.
Experimental investigation of oil accumulation in second land of internal combustion engines İÇÖZ, TUNÇ; Dursunkaya, Zafer (ASME International, 2005-01-01) Blowback of engine oil suspended in combustion gases, when the gas flows from the piston second land back into the combustion chamber is believed to contribute to oil consumption and hydrocarbon emissions in internal combustion engines. Oil accumulation in the region between top and second compression rings is a factor that influences this phenomenon. The effects of individual parameters, such as oil film thickness and viscosity, however have still not been understood. The present study was aimed at constru...
Random walk particle modelling of polymer injection using matlab reservoir simulation toolbox Mamak, Gökhan; Durgut, İsmail; Department of Petroleum and Natural Gas Engineering (2017) Enhanced oil recovery (EOR) is essential to increase the maximum recoverable oil by natural means of production. Having chosen an EOR method, the effectiveness of the method should be analyzed before applying to a reservoir since the methods are generally costly. Polymer injection is a chemical EOR process, where the injected polymer with water increases the water viscosity, and help increasing the sweep efficiency in the reservoir. In order to model the effects of polymer injection, the random-walk particl...
Optimization of CO₂ EOR and storage design under uncertainity Bender, Serdar; Akın, Serhat; Department of Petroleum and Natural Gas Engineering (2016) The combination of CO₂ enhanced oil recovery (EOR) and permanent CO₂ storage in mature oil reservoirs have the potential to provide a critical near-term solution for reducing greenhouse gas emissions. In the literature, although there are many studies about CO₂ storage and EOR, only a few studies have focused on maximizing both the oil recovery and the CO₂ storage. Moreover, these studies are either experimental or conducted using synthetic reservoir models. Typically, pure CO₂ has the property of mixing wi...

Citation Formats

A. Karkaç, “Backflow oil transfer in internal combustion engines,” Middle East Technical University, 2002.