Effect of instantaneous rotational speed on the analysis of measured diesel engine cylinder pressure data

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dc.contributor.author Antonopoulos, AK en
dc.contributor.author Hountalas, DT en
dc.date.accessioned 2014-03-01T02:53:37Z
dc.date.available 2014-03-01T02:53:37Z
dc.date.issued 2012 en
dc.identifier.issn 01968904 en
dc.identifier.uri http://hdl.handle.net/123456789/36449
dc.subject Crank angle encoder en
dc.subject Cylinder pressure en
dc.subject Heat release rate en
dc.subject Indicated mean effective pressure en
dc.subject Instantaneous engine speed en
dc.subject.other Crank angle en
dc.subject.other Cylinder pressures en
dc.subject.other Engine speed en
dc.subject.other Heat Release Rate (HRR) en
dc.subject.other Indicated mean effective pressure en
dc.subject.other Diesel engines en
dc.subject.other Engine cylinders en
dc.title Effect of instantaneous rotational speed on the analysis of measured diesel engine cylinder pressure data en
heal.type conferenceItem en
heal.identifier.primary 10.1016/j.enconman.2012.01.020 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.enconman.2012.01.020 en
heal.publicationDate 2012 en
heal.abstract Diesel engine cylinder pressure measurements are widely used in field and lab applications to support among other control, monitoring and diagnostic applications. There are two methods to measure cylinder pressure, the use of a crank angle encoder, which guarantees pressure samples at fixed crank angles, and the use of constant time sampling rate. The last is frequently used due to its simplicity or because of practical restrictions. However, in order to perform thermodynamic calculations it is necessary to attribute a crank angle value to each measured pressure value. But if the in-cycle rotational speed fluctuates and this is neglected, an error will result in the values derived from the processing of the measured cylinder pressure. For this reason in the present work an experimental investigation is conducted on a single cylinder diesel test engine to identify the aforementioned problem. During the tests cylinder pressure and instantaneous speed were recorded using an accurate crank angle reference. These where then used to simulate the measurement of cylinder pressure digitized using a fixed time step. The comparison of the two cylinder pressure traces and the thermodynamic parameters derived from them, reveals the introduction of an error which depends on engine load and speed. © 2012 Elsevier Ltd. All rights reserved. en
heal.journalName Energy Conversion and Management en
dc.identifier.doi 10.1016/j.enconman.2012.01.020 en
dc.identifier.volume 60 en
dc.identifier.spage 87 en
dc.identifier.epage 95 en

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