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Claudio Ciaravino - One of the best experts on this subject based on the ideXlab platform.
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zeuch method based Injection Rate analysis of a common rail system opeRated with advanced Injection stRategies
Fuel, 2014Co-Authors: L. Postrioti, Giacomo Buitoni, Francesco C. Pesce, Claudio CiaravinoAbstract:In the present paper the results of an experimental hydraulic analysis of a common rail Injection system are discussed. A complete wet system, composed of an automotive Injection pump, a rail and a Bosch CRI2.16 injector, is analyzed in realistic operating conditions. The hydraulic analysis is carried out by a Zeuch method-based instrument which is used to measure the injected volume and the Injection Rate; both these quantities are obtained in mean terms and shot-to-shot resolved in order to investigate the system operation dispersion. The Injection Rate measurement is supplemented by both the rail pressure and the needle movement measurements to better analyze the injector behavior. Some different advanced injector driving stRategies are analyzed, focusing on reduced dwell time operation conditions. Peculiar attention is devoted to the Injection process start detection, which is of special interest in case of multiple Injections. An accuRate analysis of the Injection Rate time-history suggests that in the initial part of the process the flow is directed toward the injector nozzle (negative flow) and only after a short time the Injection Rate profile becomes positive, apparently indicating the start of the Injection process. In order to define a proper start time detection criterion, the results of the hydraulic analysis were compared with the spray evolution analysis based on imaging carried out by an ensemble-averaged approach. This comparison suggested that the Injection start can be derived by the hydraulic analysis: the outflow onset is generally synchronized with the first positive values of the injected volume, computed as the time integral of the Injection Rate profile.
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Zeuch method-based Injection Rate analysis of a common-rail system opeRated with advanced Injection stRategies
Fuel, 2014Co-Authors: L. Postrioti, Giacomo Buitoni, Francesco C. Pesce, Claudio CiaravinoAbstract:In the present paper the results of an experimental hydraulic analysis of a common rail Injection system are discussed. A complete wet system, composed of an automotive Injection pump, a rail and a Bosch CRI2.16 injector, is analyzed in realistic operating conditions. The hydraulic analysis is carried out by a Zeuch method-based instrument which is used to measure the injected volume and the Injection Rate; both these quantities are obtained in mean terms and shot-to-shot resolved in order to investigate the system operation dispersion. The Injection Rate measurement is supplemented by both the rail pressure and the needle movement measurements to better analyze the injector behavior. Some different advanced injector driving stRategies are analyzed, focusing on reduced dwell time operation conditions. Peculiar attention is devoted to the Injection process start detection, which is of special interest in case of multiple Injections. An accuRate analysis of the Injection Rate time-history suggests that in the initial part of the process the flow is directed toward the injector nozzle (negative flow) and only after a short time the Injection Rate profile becomes positive, apparently indicating the start of the Injection process. In order to define a proper start time detection criterion, the results of the hydraulic analysis were compared with the spray evolution analysis based on imaging carried out by an ensemble-averaged approach. This comparison suggested that the Injection start can be derived by the hydraulic analysis: the outflow onset is generally synchronized with the first positive values of the injected volume, computed as the time integral of the Injection Rate profile. © 2014 Elsevier Ltd. All rights reserved.
L. Postrioti - One of the best experts on this subject based on the ideXlab platform.
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zeuch method based Injection Rate analysis of a common rail system opeRated with advanced Injection stRategies
Fuel, 2014Co-Authors: L. Postrioti, Giacomo Buitoni, Francesco C. Pesce, Claudio CiaravinoAbstract:In the present paper the results of an experimental hydraulic analysis of a common rail Injection system are discussed. A complete wet system, composed of an automotive Injection pump, a rail and a Bosch CRI2.16 injector, is analyzed in realistic operating conditions. The hydraulic analysis is carried out by a Zeuch method-based instrument which is used to measure the injected volume and the Injection Rate; both these quantities are obtained in mean terms and shot-to-shot resolved in order to investigate the system operation dispersion. The Injection Rate measurement is supplemented by both the rail pressure and the needle movement measurements to better analyze the injector behavior. Some different advanced injector driving stRategies are analyzed, focusing on reduced dwell time operation conditions. Peculiar attention is devoted to the Injection process start detection, which is of special interest in case of multiple Injections. An accuRate analysis of the Injection Rate time-history suggests that in the initial part of the process the flow is directed toward the injector nozzle (negative flow) and only after a short time the Injection Rate profile becomes positive, apparently indicating the start of the Injection process. In order to define a proper start time detection criterion, the results of the hydraulic analysis were compared with the spray evolution analysis based on imaging carried out by an ensemble-averaged approach. This comparison suggested that the Injection start can be derived by the hydraulic analysis: the outflow onset is generally synchronized with the first positive values of the injected volume, computed as the time integral of the Injection Rate profile.
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Zeuch method-based Injection Rate analysis of a common-rail system opeRated with advanced Injection stRategies
Fuel, 2014Co-Authors: L. Postrioti, Giacomo Buitoni, Francesco C. Pesce, Claudio CiaravinoAbstract:In the present paper the results of an experimental hydraulic analysis of a common rail Injection system are discussed. A complete wet system, composed of an automotive Injection pump, a rail and a Bosch CRI2.16 injector, is analyzed in realistic operating conditions. The hydraulic analysis is carried out by a Zeuch method-based instrument which is used to measure the injected volume and the Injection Rate; both these quantities are obtained in mean terms and shot-to-shot resolved in order to investigate the system operation dispersion. The Injection Rate measurement is supplemented by both the rail pressure and the needle movement measurements to better analyze the injector behavior. Some different advanced injector driving stRategies are analyzed, focusing on reduced dwell time operation conditions. Peculiar attention is devoted to the Injection process start detection, which is of special interest in case of multiple Injections. An accuRate analysis of the Injection Rate time-history suggests that in the initial part of the process the flow is directed toward the injector nozzle (negative flow) and only after a short time the Injection Rate profile becomes positive, apparently indicating the start of the Injection process. In order to define a proper start time detection criterion, the results of the hydraulic analysis were compared with the spray evolution analysis based on imaging carried out by an ensemble-averaged approach. This comparison suggested that the Injection start can be derived by the hydraulic analysis: the outflow onset is generally synchronized with the first positive values of the injected volume, computed as the time integral of the Injection Rate profile. © 2014 Elsevier Ltd. All rights reserved.
Giacomo Buitoni - One of the best experts on this subject based on the ideXlab platform.
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zeuch method based Injection Rate analysis of a common rail system opeRated with advanced Injection stRategies
Fuel, 2014Co-Authors: L. Postrioti, Giacomo Buitoni, Francesco C. Pesce, Claudio CiaravinoAbstract:In the present paper the results of an experimental hydraulic analysis of a common rail Injection system are discussed. A complete wet system, composed of an automotive Injection pump, a rail and a Bosch CRI2.16 injector, is analyzed in realistic operating conditions. The hydraulic analysis is carried out by a Zeuch method-based instrument which is used to measure the injected volume and the Injection Rate; both these quantities are obtained in mean terms and shot-to-shot resolved in order to investigate the system operation dispersion. The Injection Rate measurement is supplemented by both the rail pressure and the needle movement measurements to better analyze the injector behavior. Some different advanced injector driving stRategies are analyzed, focusing on reduced dwell time operation conditions. Peculiar attention is devoted to the Injection process start detection, which is of special interest in case of multiple Injections. An accuRate analysis of the Injection Rate time-history suggests that in the initial part of the process the flow is directed toward the injector nozzle (negative flow) and only after a short time the Injection Rate profile becomes positive, apparently indicating the start of the Injection process. In order to define a proper start time detection criterion, the results of the hydraulic analysis were compared with the spray evolution analysis based on imaging carried out by an ensemble-averaged approach. This comparison suggested that the Injection start can be derived by the hydraulic analysis: the outflow onset is generally synchronized with the first positive values of the injected volume, computed as the time integral of the Injection Rate profile.
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Zeuch method-based Injection Rate analysis of a common-rail system opeRated with advanced Injection stRategies
Fuel, 2014Co-Authors: L. Postrioti, Giacomo Buitoni, Francesco C. Pesce, Claudio CiaravinoAbstract:In the present paper the results of an experimental hydraulic analysis of a common rail Injection system are discussed. A complete wet system, composed of an automotive Injection pump, a rail and a Bosch CRI2.16 injector, is analyzed in realistic operating conditions. The hydraulic analysis is carried out by a Zeuch method-based instrument which is used to measure the injected volume and the Injection Rate; both these quantities are obtained in mean terms and shot-to-shot resolved in order to investigate the system operation dispersion. The Injection Rate measurement is supplemented by both the rail pressure and the needle movement measurements to better analyze the injector behavior. Some different advanced injector driving stRategies are analyzed, focusing on reduced dwell time operation conditions. Peculiar attention is devoted to the Injection process start detection, which is of special interest in case of multiple Injections. An accuRate analysis of the Injection Rate time-history suggests that in the initial part of the process the flow is directed toward the injector nozzle (negative flow) and only after a short time the Injection Rate profile becomes positive, apparently indicating the start of the Injection process. In order to define a proper start time detection criterion, the results of the hydraulic analysis were compared with the spray evolution analysis based on imaging carried out by an ensemble-averaged approach. This comparison suggested that the Injection start can be derived by the hydraulic analysis: the outflow onset is generally synchronized with the first positive values of the injected volume, computed as the time integral of the Injection Rate profile. © 2014 Elsevier Ltd. All rights reserved.
Francesco C. Pesce - One of the best experts on this subject based on the ideXlab platform.
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zeuch method based Injection Rate analysis of a common rail system opeRated with advanced Injection stRategies
Fuel, 2014Co-Authors: L. Postrioti, Giacomo Buitoni, Francesco C. Pesce, Claudio CiaravinoAbstract:In the present paper the results of an experimental hydraulic analysis of a common rail Injection system are discussed. A complete wet system, composed of an automotive Injection pump, a rail and a Bosch CRI2.16 injector, is analyzed in realistic operating conditions. The hydraulic analysis is carried out by a Zeuch method-based instrument which is used to measure the injected volume and the Injection Rate; both these quantities are obtained in mean terms and shot-to-shot resolved in order to investigate the system operation dispersion. The Injection Rate measurement is supplemented by both the rail pressure and the needle movement measurements to better analyze the injector behavior. Some different advanced injector driving stRategies are analyzed, focusing on reduced dwell time operation conditions. Peculiar attention is devoted to the Injection process start detection, which is of special interest in case of multiple Injections. An accuRate analysis of the Injection Rate time-history suggests that in the initial part of the process the flow is directed toward the injector nozzle (negative flow) and only after a short time the Injection Rate profile becomes positive, apparently indicating the start of the Injection process. In order to define a proper start time detection criterion, the results of the hydraulic analysis were compared with the spray evolution analysis based on imaging carried out by an ensemble-averaged approach. This comparison suggested that the Injection start can be derived by the hydraulic analysis: the outflow onset is generally synchronized with the first positive values of the injected volume, computed as the time integral of the Injection Rate profile.
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Zeuch method-based Injection Rate analysis of a common-rail system opeRated with advanced Injection stRategies
Fuel, 2014Co-Authors: L. Postrioti, Giacomo Buitoni, Francesco C. Pesce, Claudio CiaravinoAbstract:In the present paper the results of an experimental hydraulic analysis of a common rail Injection system are discussed. A complete wet system, composed of an automotive Injection pump, a rail and a Bosch CRI2.16 injector, is analyzed in realistic operating conditions. The hydraulic analysis is carried out by a Zeuch method-based instrument which is used to measure the injected volume and the Injection Rate; both these quantities are obtained in mean terms and shot-to-shot resolved in order to investigate the system operation dispersion. The Injection Rate measurement is supplemented by both the rail pressure and the needle movement measurements to better analyze the injector behavior. Some different advanced injector driving stRategies are analyzed, focusing on reduced dwell time operation conditions. Peculiar attention is devoted to the Injection process start detection, which is of special interest in case of multiple Injections. An accuRate analysis of the Injection Rate time-history suggests that in the initial part of the process the flow is directed toward the injector nozzle (negative flow) and only after a short time the Injection Rate profile becomes positive, apparently indicating the start of the Injection process. In order to define a proper start time detection criterion, the results of the hydraulic analysis were compared with the spray evolution analysis based on imaging carried out by an ensemble-averaged approach. This comparison suggested that the Injection start can be derived by the hydraulic analysis: the outflow onset is generally synchronized with the first positive values of the injected volume, computed as the time integral of the Injection Rate profile. © 2014 Elsevier Ltd. All rights reserved.
Thivaharan Albin - One of the best experts on this subject based on the ideXlab platform.
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Optimization-based fuel Injection Rate digitalization for combustion Rate shaping
2019 American Control Conference (ACC), 2019Co-Authors: Dennis Ritter, Metin Korkmaz, Heinz Pitsch, Dirk Abel, Thivaharan AlbinAbstract:A major challenge of diesel engine development is the reduction of pollutant and CO2 emissions. For that reason new solutions for clean and efficient combustion are investigated. One promising approach is the so-called combustion Rate shaping. In this case the entire in-cycle resolved pressure or combustion Rate trace is controlled by manipulating the whole fuel Injection Rate profile. One substantial task within combustion Rate shaping is therefore the realization of the continuously shaped fuel Injection Rate profile. State of the art series production Injection systems do not allow for a continuously shaping of the Injection Rate profile. Instead a multi-pulse fuel Injection pattern with a finite number of Injection events is being applied to approximate a continuous shaping. Each of these pulses is parameterized by corresponding actuation timings controlling the start and the duration of the Injection event. In this contribution an optimization-based method for the digitalization of a continuous fuel Injection Rate profile is presented. For this purpose a reduced order injector model is presented. Additionally a suitable optimization problem is derived and presented along with numerical solution techniques.
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ACC - Optimization-based fuel Injection Rate digitalization for combustion Rate shaping
2019 American Control Conference (ACC), 2019Co-Authors: Dennis Ritter, Metin Korkmaz, Heinz Pitsch, Dirk Abel, Thivaharan AlbinAbstract:A major challenge of diesel engine development is the reduction of pollutant and CO 2 emissions. For that reason new solutions for clean and efficient combustion are investigated. One promising approach is the so-called combustion Rate shaping. In this case the entire in-cycle resolved pressure or combustion Rate trace is controlled by manipulating the whole fuel Injection Rate profile. One substantial task within combustion Rate shaping is therefore the realization of the continuously shaped fuel Injection Rate profile. State of the art series production Injection systems do not allow for a continuously shaping of the Injection Rate profile. Instead a multi-pulse fuel Injection pattern with a finite number of Injection events is being applied to approximate a continuous shaping. Each of these pulses is parameterized by corresponding actuation timings controlling the start and the duration of the Injection event. In this contribution an optimization-based method for the digitalization of a continuous fuel Injection Rate profile is presented. For this purpose a reduced order injector model is presented. Additionally a suitable optimization problem is derived and presented along with numerical solution techniques.
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Iterative learning approach for diesel combustion control using Injection Rate shaping
2015 European Control Conference (ECC), 2015Co-Authors: R. Zweigel, Dirk Abel, F. Thelen, Thivaharan AlbinAbstract:State of the art in combustion control consists of discrete and clearly sepaRated multiple Injection events. Future available injector types establish highly flexible Injection, allowing for continuously variable Injection timings and therewith shaping of the fuel Injection Rate. This leads to a more direct influence on combustion, e.g. control of time-continuous pressure traces instead of mean value control. The overall advantage of Rate-shaping approaches is higher engine efficiency and reduction of engine-out emissions at the same time. However, well investigated and established model-based control approaches are not applicable anymore. For that reason, this paper presents a simple and effective control method which uses iterative learning control (ILC) combined with variable Injection Rate. The presented control algorithm is validated for diesel combustion. To make ILC applicable to combustion processes, the underlying learning rule will be extended by model-based combustion knowledge. Static and dynamic simulation results are presented which emphasize the relevance of the approach.
