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A new knock event definition for knock detection and control optimization

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A new knock event definition for knock detection and control optimization

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dc.contributor.author Bares-Moreno, Pau es_ES
dc.contributor.author Selmanaj, D es_ES
dc.contributor.author Guardiola, Carlos es_ES
dc.contributor.author Onder, C. es_ES
dc.date.accessioned 2019-12-13T21:01:20Z
dc.date.available 2019-12-13T21:01:20Z
dc.date.issued 2018 es_ES
dc.identifier.issn 1359-4311 es_ES
dc.identifier.uri http://hdl.handle.net/10251/132954
dc.description.abstract [EN] In this paper, the knock phenomenon is studied and characterized in the time-frequency domain. From the analysis results, a new knock event definition is proposed, which compares the excitation of the cylinder resonance produced by the autoignition of the end gas to that associated with the combustion. The new definition permits a more consistent differentiation between knocking and not knocking cycles than the classical approach in the literature, thus allowing the improvement of the knock control strategies. The new knock index proposed analyses the frequency spectrum of the pressure signal in two locations, i.e. near the maximum heat release and near the end of combustion, by using the fast Fourier transform and a window function, and it is compared with the classical MAPO definition, which consists on finding the maximum pressure oscillation in the time domain. Both indices have been implemented online in a four-stroke SI engine and its performance is illustrated by using a classical knock control strategy. Results obtained under different operating conditions demonstrate that the improved knock index definition can substantially reduce the variability of the spark advance angle control, avoiding strong knocking events and reducing engine vibration. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Applied Thermal Engineering es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Knock es_ES
dc.subject SI engines es_ES
dc.subject STFT es_ES
dc.subject Resonance es_ES
dc.subject Control es_ES
dc.subject.classification INGENIERIA AEROESPACIAL es_ES
dc.subject.classification MAQUINAS Y MOTORES TERMICOS es_ES
dc.title A new knock event definition for knock detection and control optimization es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.applthermaleng.2017.11.138 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Máquinas y Motores Térmicos - Departament de Màquines i Motors Tèrmics es_ES
dc.description.bibliographicCitation Bares-Moreno, P.; Selmanaj, D.; Guardiola, C.; Onder, C. (2018). A new knock event definition for knock detection and control optimization. Applied Thermal Engineering. 131:80-88. https://doi.org/10.1016/j.applthermaleng.2017.11.138 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.applthermaleng.2017.11.138 es_ES
dc.description.upvformatpinicio 80 es_ES
dc.description.upvformatpfin 88 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 131 es_ES
dc.relation.pasarela S\374245 es_ES


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