Variation of Exhaust Gas Temperature with the Change of Spark Timing and Exhaust Valve Timing During Cold Start Operation of an SI Engine

Yang, Chang-Seok; Park, Young‐Joon; Cho, Yong-Seok; Kim, Duk-Sang

doi:10.3795/ksme-b.2005.29.3.384

Cited by 3 publications

(2 citation statements)

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“…Only for large excursions of the ignition angle do we have significant changes in temperature [4]. If the reader wishes, they can consult [5], which is another study that showed variations in exhaust temperature according to excursions in the ignition angle for cold start. In this study, the temperature variations are also negligible.…”

Section: Modelingmentioning

confidence: 99%

Estimativa da temperatura dos gases de exaustão para um motor a biogás

PEREIRA,

CARVALHO,

MAGGIO

et al. 2023

Blucher Engineering Proceedings

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This article examines the effects of charge, engine speed, ignition timing, and air-fuel ratio on the temperature of exhaust gases when using biogas as fuel. The effects of varying engine operating conditions on exhaust gas temperature are analyzed. The article discusses whether increasing engine charge and engine speed leads to higher exhaust gas temperatures, and whether adjusting ignition timing and air-fuel ratio has a more complex effect on temperature. Detailed analyses are presented to conclude that optimal ignition timing and air-fuel ratio can lead to reduced exhaust gas temperatures and improved engine efficiency when using biogas as fuel.

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Section: Modelingmentioning

confidence: 99%

Estimativa da temperatura dos gases de exaustão para um motor a biogás

PEREIRA,

CARVALHO,

MAGGIO

et al. 2023

Blucher Engineering Proceedings

View full text Add to dashboard Cite

show abstract

“…The spark advance also influences the maximum temperature reached during combustion. Indeed, the timing of the ignition with the compression phase of the gases by the piston influences the temperature and pressure at the beginning of combustion and during the propagation of the flame [28]. Higher pressure increases the volume concentration of the mixture and reduces the average free path of the molecules.…”

mentioning

confidence: 99%

Optimal Control of a Spark Ignition Engine Including Cold Start Operations for Consumption/Emissions Compromises

et al. 2021

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This study presents a semi-empirical modeling approach based on an extensive parametric study using a spark-ignition port-injection engine. The experimental results are used to derive engine-out emission models for each regulated pollutant (CO, HC, NOx) as a function of engine operating parameters. Such parameters include engine speed, intake manifold pressure, equivalence ratio, and spark advance. The proposed models provide accurate predictions over a large range of engine operating conditions. The adequate accuracy and low computational burden of the models are promising in the context of optimal control theory. Dynamic programming is applied in order to find the best operating parameters that define trade-off between fuel consumption and emissions over driving cycles.

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