General Aviation Engine Oil Filtration - A Model Specification

1971 ◽  
Author(s):  
William M. Paradise ◽  
H. C. Mouwen
Keyword(s):  
General Aviation ◽  
Model Specification ◽  
Engine Oil ◽  
Oil Filtration

Preparation and Oil Filtration Properties of Electrospun Nanofiber Composite Material

2014 ◽  
Vol 9 (4) ◽  
pp. 155892501400900 ◽  
Author(s):  
Jian Yong Feng ◽  
Jian Chun Zhang ◽  
Daxiang Yang
Keyword(s):  
Composite Material ◽  
Pressure Drop ◽  
Pore Diameter ◽  
Engine Oil ◽  
Electrospun Nanofiber ◽  
Nanofiber Composite ◽  
Automobile Engine ◽  
Pulp Paper ◽  
The Difference ◽  
Oil Filtration

In this paper, PVA electrospun nanofiber was prepared on the surface of three different automobile engine oil filtration materials including polyester nonwoven, glass fiber nonwoven, and cotton pulp filtration paper. It was found that the substrate of cotton pulp filtration paper and the nanofiber layer had better adhesive effect. Then we A comparison of fiber diameter, pore diameter, filtration accuracy and pressure drop between the cotton pulp paper and nanofiber composite filtration material was then made. The results show that the nanofiber composite material had smaller pore diameter and filtration accuracy, higher pressure drop, and better oil filtration property. Additionally, the difference of pressure drop between the substrate and nanofiber composite material increased with increasing flow rate of experimental oil. The goal of this paper was use the electrospun nanofiber in the automobile engine oil filtration.

The Property of Automobile Engine Oil Filtration Material and the Development of New Filter

2014 ◽  
Vol 9 (3) ◽  
pp. 155892501400900
Author(s):  
Jian Yong Feng ◽  
Jianchun Zhang
Keyword(s):  
Hierarchical Cluster ◽  
Filter Material ◽  
Data Matrix ◽  
Engine Oil ◽  
Cluster Method ◽  
Hierarchical Cluster Method ◽  
Structure And Property ◽  
Used Oil ◽  
Filtration Material ◽  
Oil Filtration

The main purposes of this paper are to research the structure and property of commonly used oil filtration materials on the basis of the hierarchical cluster method and to develop new filter material. For this objective we selected ten different oil filtration materials and made a comparison of their filtration properties. In addition, the hierarchical cluster method was used to classify these ten oil filtration materials into three different categories. Objective classification results in the case of data matrix of different properties had a rather accurate result, which was almost consistent with the result of subjective classification. It was found that three different kinds of filtration material had different structures and properties in practical application. In addition, the results indicate that the filtration property of the new filter developed on the basis of hierarchical cluster analysis was very close to the first material.

scholarly journals Influence of filter elements on the operation of tribomechanical systems

2021 ◽  
Vol 101 (3) ◽  
pp. 56-62
Author(s):  
M. Dmitrichenko ◽  
A. Savchuk ◽  
Yu. Turitsa ◽  
A. Milanenko ◽  
Keyword(s):  
Settling Tank ◽  
The Body ◽  
Filter Element ◽  
Engine Oil ◽  
Passenger Cars ◽  
Cleaning Efficiency ◽  
Filtration System ◽  
Through Flow ◽  
Oil Flow ◽  
Oil Filtration

Oil filter is a part of a gasoline or diesel engine lubrication system designed to clean the engine oil. Depending on where it is installed, the oil filtration system, they are divided into three types: - through-flow filter, which passes through all the oil that the pump feeds into the engine. A pressure regulating by-pass valve is installed upstream of the filter to protect the gaskets with oil seals. If the filter element is too dirty, the valve directs oil flow past the filter, preventing oil starvation of the bearings. Keeps engine from failing due to lack of lubrication; - a partial-flow filter is mounted parallel to the main oil line and cleans only a portion of the oil that enters the engine. Gradually the whole volume of oil passes through the filter element, giving a fairly high cleaning efficiency. However, this method does not provide absolute protection of parts from chips and other abrasives; - the combination filter combines a full-flow and a partial-flow cleaning principle. It consists of two filter elements, one mounted parallel to the oil line and the other cut into it. This ensures maximum cleaning efficiency and long filter life. The filter elements are divided into two types according to their efficiency in removing fine impurities: coarse filters, which remove coarse impurities, and fine filters, which remove fine impurities. According to the design of the housing and the possibility of replacing the filter element, filters are divided into multiple (collapsible) and disposable (non-collapsible). Modern engines may use filters in the form of a cartridge, which is inserted into a special compartment. During operation, the oil is first routed to the filter and then through the oil channels to the interacting parts in the engine. This principle is used on all standard passenger cars. A settling filter (gravity filter) is a tank with a filter element and a settling tank in which impurities are deposited by gravity. The centrifugal filter operates similarly to the gravity filter, only dirt settles in it under the action of centrifugal force resulting from the rotation of the body

Protect and Care (PaC) System for Lubrication Oil in Railway Applications

2015 ◽  
Author(s):  
Götz Fischer ◽  
Stefan Schmitz
Keyword(s):  
Engine Speed ◽  
Weather Conditions ◽  
Technical Conference ◽  
Engine Oil ◽  
Filtration System ◽  
Cartridge Filter ◽  
Lubrication Oil ◽  
Oil Filtration

In 2006, an automatic lube oil filtration system with an automatic backflushing filter and a centrifuge for railway engines was already presented at the ASME spring technical conference in Aachen. The technical benefit of a centrifuge compared to a cartridge filter is the ability to collect smaller particles. The power to drive the centrifuge comes from the engine oil pressure. This engine oil pressure is dependent from the engine speed. Many operating profiles of locomotives are showing low engine speed and load e.g. while waiting in switchyard and under arctic weather conditions the engines keep idling even during “downtime”. Under those conditions a centrifuge is ineffective or even out of operation.

Cognitive Factors Mediate the Relation Between Age and Flight Path Maintenance in General Aviation

2016 ◽  
Vol 6 (2) ◽  
pp. 81-90 ◽  
Author(s):  
Kathleen Van Benthem ◽  
Chris M. Herdman
Keyword(s):  
Cognitive Functioning ◽  
Flight Path ◽  
General Aviation ◽  
Cognitive Factors ◽  
Pilot Performance ◽  
Pilot Error ◽  
Age Related ◽  
And Performance ◽  
Relationship Of ◽  
The Relationship

Abstract. Identifying pilot attributes associated with risk is important, especially in general aviation where pilot error is implicated in most accidents. This research examined the relationship of pilot age, expertise, and cognitive functioning to deviations from an ideal circuit trajectory. In all, 54 pilots, of varying age, flew a Cessna 172 simulator. Cognitive measures were obtained using the CogScreen-AE ( Kay, 1995 ). Older age and lower levels of expertise and cognitive functioning were associated with significantly greater flight path deviations. The relationship between age and performance was fully mediated by a cluster of cognitive factors: speed and working memory, visual attention, and cognitive flexibility. These findings add to the literature showing that age-related changes in cognition may impact pilot performance.

Forced Zero Cross-Loading Misspecifications in Measurement Component of Structural Equation Models

Methodology ◽  
2014 ◽  
Vol 10 (4) ◽  
pp. 138-152 ◽  
Author(s):  
Hsien-Yuan Hsu ◽  
Susan Troncoso Skidmore ◽  
Yan Li ◽  
Bruce Thompson
Keyword(s):  
Structural Equation ◽  
Structural Model ◽  
Structural Equation Models ◽  
Equation Model ◽  
Model Fit ◽  
Model Specification ◽  
Simulation Design ◽  
Measurement Models ◽  
Fit Statistics ◽  
Path Coefficients

The purpose of the present paper was to evaluate the effect of constraining near-zero parameter cross-loadings to zero in the measurement component of a structural equation model. A Monte Carlo 3 × 5 × 2 simulation design was conducted (i.e., sample sizes of 200, 600, and 1,000; parameter cross-loadings of 0.07, 0.10, 0.13, 0.16, and 0.19 misspecified to be zero; and parameter path coefficients in the structural model of either 0.50 or 0.70). Results indicated that factor pattern coefficients and factor covariances were overestimated in measurement models when near-zero parameter cross-loadings constrained to zero were higher than 0.13 in the population. Moreover, the path coefficients between factors were misestimated when the near-zero parameter cross-loadings constrained to zero were noteworthy. Our results add to the literature detailing the importance of testing individual model specification decisions, and not simply evaluating omnibus model fit statistics.

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