Behavior of an IC Engine Turbocharger in Critical Conditions of Lubrication

Galindo, José; Serrano, Juan José; Dolz, V.; López, Mariano Jiménez; Bouffaud, F.

doi:10.4271/2013-01-0921

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…The study covered TCR critical operating conditions: with insufficient oil pressure, delayed oil supply, and the periodic interruption of lubrication. The results showed that during acceleration and especially at high acceleration rates, significant malfunctions of and damage to the TCR appeared [17].…”

Section: Introductionmentioning

confidence: 98%

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Assessing the Sensitivity of the Rundown of a Turbocharger Rotor Shaft to Determine Its Technical Condition

Gritsenko,

Shepelev,

Burtsev

et al. 2023

Tribol. Ind.

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In response to the growing concern about environmental sustainability and natural resource depletion, car manufacturers are looking for ways to make their vehicles more efficient. One approach is to use turbocharging technology, which compresses the air entering the engine cylinder for a higher power density per unit of displacement volume. Although turbocharging can reduce carbon emissions by improving engine performance, it has several disadvantages, including reduced reliability and service life, increased maintenance frequency and cost, and reliance on high quality fuels and lubricants. This study investigates the possible continuous monitoring of the running time of the turbocharger (TCR) rotor shaft and the influence of various input parameters, such as oil pressure and oil temperature, on TCR wear. We hypothesize that the continuous monitoring of these variables could prevent breakdowns and optimize turbocharger operation. We created a test bench consisting of an internal combustion engine (ICE) combined with a turbocharging system which includes an independent lubrication and braking mechanism. Our experiments demonstrated a positive correlation between oil inlet temperature and wear sensitivity over time. We also revealed a close relationship between oil inlet pressure, thermal properties, initial rotor speed, and wear duration. These results indicate that continuous qualitative and quantitative monitoring of wear progression can predict impending failures and increase turbocharger efficiency. The evaluation of the TCR sensitivity to wear time can assess both the quality of the turbocharger assembly at the manufacturing stage and the adequacy of its preliminary adaptation in real conditions.

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Section: Introductionmentioning

confidence: 98%

“…The behavior of the lubricant flow in the plain bearings of the TCR shaft was studied in [15,16,17]. Chuepeng et al [15] found that high oil inlet temperatures contribute to high TCR efficiency, while oil viscosity does not significantly affect the turbine pressure or the operation ratio.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Sensitivity of the Rundown of a Turbocharger Rotor Shaft to Determine Its Technical Condition

Gritsenko,

Shepelev,

Burtsev

et al. 2023

Tribol. Ind.

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“…Serrano et al [8] study the robustness of several turbochargers ingestion of different elements such as screws, sand or water with the compressor. Galindo et al [9] also study the mechanical behaviour of turbochargers with intermittent stops of the lubricating oil flow. In the literature, several studies about turbocharger endurance and loss of efficiency have been found.…”

Section: Introductionmentioning

confidence: 99%

Fast three-dimensional heat transfer model for computing internal temperatures in the bearing housing of automotive turbochargers

Gil

Tiseira

García-Cuevas

et al. 2018

International Journal of Engine Research

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Each of the elements that make up the turbocharger has been gradually improved. In order to ensure that the system does not experience any mechanical failures or loss of efficiency, it is important to study which engine-operating conditions could produce the highest failing rate. Common failing conditions in turbochargers are mostly achieved due to oil contamination and high temperatures in the bearing system. Thermal management becomes increasingly important for the required engine performance. Therefore, it has become necessary to have accurate temperature and heat transfer models. Most thermal design and analysis codes need data for validation; often the data available fall outside the range of conditions the engine experiences in reality leading to the need to interpolate and extrapolate disproportionately. This article presents a fast three-dimensional heat transfer model for computing internal temperatures in the central housing for non-water cooled turbochargers and its direct validation with experimental data at different engine-operating conditions of speed and load. The presented model allows a detailed study of the temperature rise of the central housing, lubrication channels, and maximum level of temperature at different points of the bearing system of an automotive turbocharger. It will let to evaluate thermal damage done to the system itself and influences on the working fluid temperatures, which leads to oil coke formation that can affect the performance of the engine. Thermal heat transfer properties obtained from this model can be used to feed and improve a radial lumped model of heat transfer that predicts only local internal temperatures. Model validation is illustrated, and finally, the main results are discussed.

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“…An automotive turbocharger shaft can easily achieve rotational speeds higher than 200 krpm, and floating or semifloating journal bearings are usually used. Galindo et al [13] also study the mechanical behaviour of turbochargers with intermittent stops of the lubricating oil flow. The temporal lack of lubrication leads to wear of the bearings and final imbalance of the shaft very quickly.…”

Section: Introductionmentioning

confidence: 99%

Adaptation of a 1-D tool to study transient thermal in turbocharger bearing housing

Serrano

Tiseira

Usaquén

2018

Applied Thermal Engineering

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The heat transfer model can be used in a one-dimensional (1-D) engine simulation. When the engine speed is reduced to zero, the codes have been upgraded to calculate transient turbocharger thermal conditions. The turbocharger model has been used as an external plugin. Analysis of the temperature evolution at different parts of the turbocharger is done by using a hot spot engine cycle. A turbocharger bypassing strategy is done by means of a 9 bypass valve system. By using this method, instabilities can be found in the binary onoff state of an engine. Highlights  Thermal sensitivity is measured in the turbocharger in regards to a onedimensional engine.  A visual aid, such as a model, can help depict the evolution of thermal theory.  The behaviour of a turbocharger in a hot stop is affected by such diverse cooling strategies.  A coke phenomenon in the lubricating circuit affects turbocharger efficiency and durability.  High temperatures that occur within a turbocharger produce problems such as clogged bearing systems and damaged shafts.

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Behavior of an IC Engine Turbocharger in Critical Conditions of Lubrication

Cited by 9 publications

References 9 publications

Assessing the Sensitivity of the Rundown of a Turbocharger Rotor Shaft to Determine Its Technical Condition

Assessing the Sensitivity of the Rundown of a Turbocharger Rotor Shaft to Determine Its Technical Condition

Fast three-dimensional heat transfer model for computing internal temperatures in the bearing housing of automotive turbochargers

Adaptation of a 1-D tool to study transient thermal in turbocharger bearing housing

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