Numerical Study on the Performance and NOx Emission Characteristics of an 800cc MPI Turbocharged SI Engine

The main purpose of this study is to optimize engine performance and emission characteristics of off-road engines with retarded spark timing compared to MBT by repurposing the existing passenger engine. This study uses a one-dimensional (1D)-simulation to develop a non-road gasoline MPI turbo engine...

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Autores principales:	Seungmin Kim, Jaesam Sim, Youngsoo Cho, Back-Sub Sung, Jungsoo Park
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	gasoline MPI turbo SI engine wide open throttle (WOT) multi-objective pareto design of experiment (DoE) knocking Technology T
Acceso en línea:	https://doaj.org/article/b74a9635dc434a3fa7b794df3c7a4ff5
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id	oai:doaj.org-article:b74a9635dc434a3fa7b794df3c7a4ff5
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spelling	oai:doaj.org-article:b74a9635dc434a3fa7b794df3c7a4ff52021-11-11T16:08:08ZNumerical Study on the Performance and NOx Emission Characteristics of an 800cc MPI Turbocharged SI Engine10.3390/en142174191996-1073https://doaj.org/article/b74a9635dc434a3fa7b794df3c7a4ff52021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7419https://doaj.org/toc/1996-1073The main purpose of this study is to optimize engine performance and emission characteristics of off-road engines with retarded spark timing compared to MBT by repurposing the existing passenger engine. This study uses a one-dimensional (1D)-simulation to develop a non-road gasoline MPI turbo engine. The SI turbulent flame model of the GT-suite, an operational performance predictable program, presents turbocharger matching and optimal operation design points. To optimize the engine performance, the SI turbulent model uses three operation parameters: spark timing, intake valve overlap, and boost pressure. Spark timing determines the initial state of combustion and thermal efficiency, and is the main variable of the engine. The maximum brake torque (MBT) point can be identified for spark timing, and abnormal combustion phenomena, such as knocking, can be identified. Spark timing is related to engine performance, and emissions of exhaust pollutants are predictable. If the spark timing is set to variables, the engine performance and emissions can be confirmed and predicted. The intake valve overlap can predict the performance and exhaust gas by controlling the airflow and combustion chamber flow, and can control the performance of the engine by controlling the flow in the cylinder. In addition, a criterion can be set to consider the optimum operating point of the non-road vehicle while investigating the performance and exhaust gas emissions accompanying changes in boost pressure With these parameters, the design of experiment (DoE) of the 1D-simulation is performed, and the driving performance and knocking phenomenon for each RPM are predicted during the wide open throttle (WOT) of the gasoline MPI Turbo SI engine. The multi-objective Pareto technique is also used to optimize engine performance and exhaust gas emissions, and to present optimized design points for the target engine, the downsized gasoline MPI Turbo SI engine. The results of the Pareto optimal solution showed a maximum torque increase of 12.78% and a NOx decrease of 54.31%.Seungmin KimJaesam SimYoungsoo ChoBack-Sub SungJungsoo ParkMDPI AGarticlegasoline MPI turbo SI enginewide open throttle (WOT)multi-objective paretodesign of experiment (DoE)knockingTechnologyTENEnergies, Vol 14, Iss 7419, p 7419 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	gasoline MPI turbo SI engine wide open throttle (WOT) multi-objective pareto design of experiment (DoE) knocking Technology T
spellingShingle	gasoline MPI turbo SI engine wide open throttle (WOT) multi-objective pareto design of experiment (DoE) knocking Technology T Seungmin Kim Jaesam Sim Youngsoo Cho Back-Sub Sung Jungsoo Park Numerical Study on the Performance and NOx Emission Characteristics of an 800cc MPI Turbocharged SI Engine
description	The main purpose of this study is to optimize engine performance and emission characteristics of off-road engines with retarded spark timing compared to MBT by repurposing the existing passenger engine. This study uses a one-dimensional (1D)-simulation to develop a non-road gasoline MPI turbo engine. The SI turbulent flame model of the GT-suite, an operational performance predictable program, presents turbocharger matching and optimal operation design points. To optimize the engine performance, the SI turbulent model uses three operation parameters: spark timing, intake valve overlap, and boost pressure. Spark timing determines the initial state of combustion and thermal efficiency, and is the main variable of the engine. The maximum brake torque (MBT) point can be identified for spark timing, and abnormal combustion phenomena, such as knocking, can be identified. Spark timing is related to engine performance, and emissions of exhaust pollutants are predictable. If the spark timing is set to variables, the engine performance and emissions can be confirmed and predicted. The intake valve overlap can predict the performance and exhaust gas by controlling the airflow and combustion chamber flow, and can control the performance of the engine by controlling the flow in the cylinder. In addition, a criterion can be set to consider the optimum operating point of the non-road vehicle while investigating the performance and exhaust gas emissions accompanying changes in boost pressure With these parameters, the design of experiment (DoE) of the 1D-simulation is performed, and the driving performance and knocking phenomenon for each RPM are predicted during the wide open throttle (WOT) of the gasoline MPI Turbo SI engine. The multi-objective Pareto technique is also used to optimize engine performance and exhaust gas emissions, and to present optimized design points for the target engine, the downsized gasoline MPI Turbo SI engine. The results of the Pareto optimal solution showed a maximum torque increase of 12.78% and a NOx decrease of 54.31%.
format	article
author	Seungmin Kim Jaesam Sim Youngsoo Cho Back-Sub Sung Jungsoo Park
author_facet	Seungmin Kim Jaesam Sim Youngsoo Cho Back-Sub Sung Jungsoo Park
author_sort	Seungmin Kim
title	Numerical Study on the Performance and NOx Emission Characteristics of an 800cc MPI Turbocharged SI Engine
title_short	Numerical Study on the Performance and NOx Emission Characteristics of an 800cc MPI Turbocharged SI Engine
title_full	Numerical Study on the Performance and NOx Emission Characteristics of an 800cc MPI Turbocharged SI Engine
title_fullStr	Numerical Study on the Performance and NOx Emission Characteristics of an 800cc MPI Turbocharged SI Engine
title_full_unstemmed	Numerical Study on the Performance and NOx Emission Characteristics of an 800cc MPI Turbocharged SI Engine
title_sort	numerical study on the performance and nox emission characteristics of an 800cc mpi turbocharged si engine
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b74a9635dc434a3fa7b794df3c7a4ff5
work_keys_str_mv	AT seungminkim numericalstudyontheperformanceandnoxemissioncharacteristicsofan800ccmpiturbochargedsiengine AT jaesamsim numericalstudyontheperformanceandnoxemissioncharacteristicsofan800ccmpiturbochargedsiengine AT youngsoocho numericalstudyontheperformanceandnoxemissioncharacteristicsofan800ccmpiturbochargedsiengine AT backsubsung numericalstudyontheperformanceandnoxemissioncharacteristicsofan800ccmpiturbochargedsiengine AT jungsoopark numericalstudyontheperformanceandnoxemissioncharacteristicsofan800ccmpiturbochargedsiengine
_version_	1718432436562427904

Numerical Study on the Performance and NOx Emission Characteristics of an 800cc MPI Turbocharged SI Engine

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