The Use of Linear Sweep Voltammetry in Condition Monitoring of Diesel Engine Oil

2011 ◽  
Vol 8 (7) ◽  
pp. 103442 ◽  
Author(s):  
Amy Fentress ◽  
John Sander ◽  
Jo Ameye ◽  
A. Toms ◽  
S. W. Dean
Keyword(s):  
Diesel Engine ◽  
Condition Monitoring ◽  
Linear Sweep Voltammetry ◽  
Engine Oil ◽  
Linear Sweep

Condition monitoring of a diesel engine fueled with a blend of diesel, biodiesel, and butanol using engine oil analysis

Biofuels ◽  
2015 ◽  
Vol 6 (3-4) ◽  
pp. 223-231 ◽  
Author(s):  
Santosh Kumar Kurre ◽  
Shyam Pandey ◽  
Rajnish Garg ◽  
Mukesh Saxena
Keyword(s):  
Diesel Engine ◽  
Condition Monitoring ◽  
Engine Oil ◽  
Oil Analysis

The Effect of Diesel Engine Oil Contamination on Friction and Wear

2005 ◽  
Author(s):  
P. Ramkumar ◽  
L. Wang ◽  
T. J. Harvey ◽  
R. J. K. Wood ◽  
K. Nelson ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Sulphuric Acid ◽  
Condition Monitoring ◽  
Friction And Wear ◽  
Engine Oil ◽  
Oil Contamination ◽  
Engine Oils ◽  
Model Diesel ◽  
The Relationship

The aim of this work is to better understand the relationship between the wear of sliding tribo-couples and contamination such as soot, sulphuric acid, moisture and oxidation levels to simulate the influence of contamination in model diesel engine oils using electrostatic condition monitoring.

Lubricating Oil Condition Monitoring Using Vibration and Air-Borne Acoustic Measurements

Volume 3 ◽  
2004 ◽  
Author(s):  
A. Albarbar ◽  
R. Gennish ◽  
F. Gu ◽  
A. Ball
Keyword(s):  
Diesel Engine ◽  
Condition Monitoring ◽  
Frequency Band ◽  
High Reliability ◽  
Fault Detection And Diagnosis ◽  
Engine Oil ◽  
Lubricating Oil ◽  
Oil Viscosity ◽  
Oil Condition Monitoring ◽  
Engine Maintenance

Modern diesel engine maintenance programs incorporate various methods and techniques for early fault detection and diagnosis to maintain efficiency, low pollution and high reliability and to avoid catastrophic failures. This study has been conducted aiming at engine oil condition monitoring and quality evaluation by analysing the engine block vibration and its induced noise. The vibration signals were measured using an accelerometer mounted on the thrust side of the first cylinder in a four cylinder diesel engine, and the noise was recorded using a microphone facing the cylinder. The signals are then band pass filtered and transformed to the frequency domain, where the amplitudes of the different frequency components of the vibration and noise waveforms are analysed and compared to the vibration and noise baseline signatures. The mean amplitudes of the spectral components in the frequency band 900 Hz to 2.5 kHz were found linearly proportional to the engine speed and load. It was also found that the RMS values of this frequency band are affected by the oil viscosity. These results show that it is possible to use vibration and airborne acoustics to predict the quality of lubrication.

scholarly journals Condition Monitoring with Prediction Based on Diesel Engine Oil Analysis: A Case Study for Urban Buses

Actuators ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 14 ◽  
Author(s):  
Hugo Raposo ◽  
José Farinha ◽  
Inácio Fonseca ◽  
L. Ferreira
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Condition Monitoring ◽  
Engine Oil ◽  
Oil Analysis ◽  
Normal Functioning ◽  
Production Time ◽  
Maximum Time

This paper presents a case study and a model to predict maintenance interventions based on condition monitoring of diesel engine oil in urban buses by accompanying the evolution of its degradation. Many times, under normal functioning conditions, the properties of the lubricants, based on the intervals that manufacturers recommend for its change, are within normal and safety conditions. Then, if the lubricants’ oil condition is adequately accompanied, until reaching the degradation limits, the intervals of oil replacement can be enlarged, meaning that the buses’ availability increases, as well as their corresponding production time. Based on this assumption, a mathematical model to follow and to manage the oil condition is presented, in order to predict the next intervention with the maximum time between them, which means the maximum availability.

Effect of cetyltrimethylammonium bromide on the electrochemiluminiscence and electrooxidation of luminol

1983 ◽  
Vol 48 (2) ◽  
pp. 477-483 ◽  
Author(s):  
Jan Lasovský ◽  
František Grambal
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
Linear Sweep Voltammetry ◽  
Critical Micellar Concentration ◽  
Peak Height ◽  
Anodic Peak ◽  
Alkaline Solutions ◽  
Platinum Electrodes ◽  
Micellar Solutions ◽  
Linear Sweep ◽  
Low Concentrations

The electrooxidation of luminol in alkaline solutions in the presence of cetyltrimethylammonium bromide (I) was studied by linear sweep voltammetry on fixed and vibrating platinum electrodes. The presence of I in low concentrations (below the critical micellar concentration) brings about aggregation of the luminol, which is manifested by an increase in the anodic peak height and its shift towards lower potentials. In micellar solutions the peak height decreases owing to the slower diffusion of the bulkier micelles, the shift to lower potentials being preserved. The light-voltage curves correspond with the voltammetric curves, exhibiting identical shifts of the peak potentials in dependence on the concentration of the surfactant.

scholarly journals Electrochemical Approaches for Rapid Characterization of Oxidizable Compounds in Different Oak Alternatives

Beverages ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Jéremie Wirth ◽  
Davide Slaghenaufi ◽  
Stéphane Vidal ◽  
Maurizio Ugliano
Keyword(s):  
Linear Sweep Voltammetry ◽  
Wine Industry ◽  
Wine Aroma ◽  
Total Current ◽  
Strong Correlations ◽  
Tannin Content ◽  
Linear Sweep ◽  
Antioxidant Characteristics ◽  
Rapid Characterization

Oak alternatives (OAs) such as chips, granulates or staves, are becoming increasingly used in the wine industry. Although they are mostly considered for their contribution to wine aroma, they are also a source of phenolic compounds to be released in the wine, in particular ellagitannins contributing to wine mouthfeel and antioxidant characteristics. In the present study, we explore the potential for a rapid analytical method based on linear sweep voltammetry (LSV) combined with disposable sensors to provide a rapid measure of the oxidizable compounds present in different OAs, as well as their characterization. Strong correlations were found between the tannin content of different OAs and the total current measures during LSV analysis, allowing a rapid quantification of the oxidizable compounds present, mostly ellagitannin. Application of derivatization to raw voltammograms allowed extraction of a number of features that can be used for classification purposes, in particular with respect to OAs types (chips or staves) and degree of toasting.

The cathodic reduction of PbO in the passive layer on lead in aqueous sulphuric acid

1984 ◽  
Vol 62 (3) ◽  
pp. 596-600 ◽  
Author(s):  
R. G. Barradas ◽  
D. S. Nadezhdin
Keyword(s):  
Experimental Data ◽  
Three Dimensional ◽  
Reference Electrode ◽  
Linear Sweep Voltammetry ◽  
Passive Layer ◽  
Cathodic Reduction ◽  
Linear Sweep ◽  
Current Time ◽  
Lead Monoxide ◽  
Two Peaks

The cathodic reduction of the lead monoxide layer formed on lead in 30% aqueous H2SO4 under anodic oxidation at 0.6 V (vs. Hg/HgSO4 reference electrode) was investigated by linear sweep voltammetry, potential step and admittance measurements. The experimental data were analyzed respectively in terms of thin-layer electrochemistry, electrocrystallisation, and changes of resistance of the PbO layer under reduction. The results seem to be best interpreted from the theory of three-dimensional electrocrystallisation as PbO is reduced to Pb. At sub-zero temperatures the PbO peak observed on our voltammograms and potentiostatic current time transients reveals the splitting of the curves into two peaks, which may be a result of reduction of the same material but of different phases, namely, orthorhombic and tetragonal PbO.

Sign in / Sign up

Export Citation Format

Share Document