The Influence of Oil Pressure in the Engine Lubrication System on Friction Losses

Rostek, Ewa; Babiak, Maciej; Wróblewski, Emil

doi:10.1016/j.proeng.2017.06.133

Cited by 9 publications

(4 citation statements)

References 4 publications

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“…It will allow assessment of oil condition and prediction its degradation. Authors think that it would be best for the owner of the aircraft and for the environment to replace oil just in the time when it is needed [3,16].…”

Section: Introductionmentioning

confidence: 99%

Influence of oil service life on selected performance parameters of an aircraft piston engine

Trendak¹,

Czarnigowski²

2023

Combustion Engines

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This article presents an analysis of the influence of oil service life on the performance parameters of an aircraft piston engine lubrication system used in an ultralight aircraft. The ageing of oil between oil changes causes a change in its parameters (such as density, viscosity ...). These parameters have a strong influence on the level of protection of the lubricated components. Currently, in aircraft, oil changes are carried out according to a time schedule - oil is changed every fixed period (residual life) regardless of its actual condition. The task of this article is to test the possibility of indirect assessment of oil condition based on analysis of changes in selected parameters of engine lubrication system operation during normal operation. The oil warm-up speed during the pre-start procedure and the dependence of oil pressure on engine speed were assumed for the analysis. The study was conducted on an ultralight rotorcraft during normal operation. Selected first daily flights directly after oil change, and after 17, 32, 50, 66 hours of operation were analysed. It was shown that the warm-up rate changes in the samples analyzed, but that this change may also be due to factors other than oil operating time. In the case of the oil pressure vs. speed characteristics, different characteristics were shown for different operating time, but no specific dependencies were found.

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Section: Introductionmentioning

confidence: 99%

Influence of oil service life on selected performance parameters of an aircraft piston engine

Trendak¹,

Czarnigowski²

2023

Combustion Engines

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“…The oil pump is an actuator between the engine and the electric motor and supplies the hydraulic fluid necessary for the transmission [6,7]. However, conventional oil pumps fail to deliver the required flow rate under operating conditions, thereby decreasing the vehicle's fuel efficiency [8].…”

Section: Introductionmentioning

confidence: 99%

Robust Design Optimization with Penalty Function for Electric Oil Pumps with BLDC Motors

Yoon

Baek

2019

Energies

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In this paper, we propose and evaluate a robust design optimization (RDO) algorithm for the shape of a brushless DC (BLDC) motor used in an electric oil pump (EOP). The components of the EOP system and the control block diagram for driving the BLDC motor are described. Although the conventional deterministic design optimization (DDO) method derives an appropriate combination of design goals and target performance, DDO does not allow free searching of the entire design space because it is confined to preset experimental combinations of parameter levels. To solve this problem, we propose an efficient RDO method that improves the torque characteristics of BLDC motors by considering design variable uncertainties. The dimensions of the stator and the rotor were selected as the design variables for the optimal design and a penalty function was applied to address the disadvantages of the conventional Taguchi method. The optimal design results obtained through the proposed RDO algorithm were confirmed by finite element analysis, and the improvement in torque and output performance was confirmed through experimental dynamometer tests of a BLDC motor fabricated according to the optimization results.

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“…Такой подход при одобрении производителя техники позволяет снизить эксплуатационные расходы за счет снижения объемов потребления смазочных материалов, снижения трудозатрат на замену смазочных материалов и фильтров, увеличивает коэффициент использования парка за счет сокращения времени простоя техники при техническом обслуживании [4,5,6].…”

Section: Introductionunclassified

Usage of High-Quality Engine Oils With Extended Replacement Intervals: Features of the Equipment Operation

Мачехин¹,

Shirlin

2019

Vestn. SibADI

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Introduction. The effective operation of cars largely depends on the state of the engines, their downtime in maintenance and repair. Since the maintenance of modern engines is often reduced to the replacement of engine oil, the increase in the duration of its work significantly reduces maintenance costs and downtime in maintenance. Long maintenance-free operation of the internal combustion engines of automotive vehicles is directly related to the state of the engine oil used in this power unit. The aim of the paper is to show the features of the equipment operation with significant intervals of the engine oils’ replacement in order to increase the efficiency of its usage. The paper presents data on the features of the equipment operation when using high-quality motor oils with extended replacement intervals.Materials and methods. The authors conducted performance tests on the basis of MercedesBenzAxor, MercedesBenzActros cars. The manufacturer provided an estimate of the performance of engine oils. The main performance characteristics of motor oils were assessed using standard methods: kinematic viscosity was measured using a Stabinger viscosimeter, the base number was determined by an automatic AT-500 titrator, the content of wear products was obtained using an ASP-coupled emission spectrophotometer.Results. As a result, the authors presented data on the dependence of the changes in the main indicators of engine oil performance while the operating time and also substantiated the requirements for the volumes of fresh engine oil to compensate losses.Discussion and conclusions. The intermediate control allows detecting faults in the internal car engines, as well as providing the most accurate prediction of the resource of the lubricant under consideration. Therefore, the increasing of the engine oil change interval allows getting a significant economic effect.

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The Influence of Oil Pressure in the Engine Lubrication System on Friction Losses

Cited by 9 publications

References 4 publications

Influence of oil service life on selected performance parameters of an aircraft piston engine

Influence of oil service life on selected performance parameters of an aircraft piston engine

Robust Design Optimization with Penalty Function for Electric Oil Pumps with BLDC Motors

Usage of High-Quality Engine Oils With Extended Replacement Intervals: Features of the Equipment Operation

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