An analytical approach to converting vibration signal to combustion characteristics of homogeneous charge compression ignition engines

Hunicz, Jacek; Gęca, Michał S.; Ratajczyk, Elżbieta; Andwari, Amin Mahmoudzadeh; Yang, Liping; Mikulski, Maciej

doi:10.1016/j.enconman.2023.117564

Cited by 2 publications

(1 citation statement)

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“…These advantages of HCCI can help achieve sustainability goals, and much research is focusing on the practical application of this technology. The biggest challenges and most research are related to controlling ignition timing and extending the operating range [40][41][42]. The pressure course in the combustion chamber of an HCCI engine is different from the pressure course in a spark ignition or a diesel engine.…”

Section: Introductionmentioning

confidence: 99%

Frictional Losses of Ring Pack in SI and HCCI Engine

Koszalka,

Wolff

2023

Energies

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The vast majority of research dedicated to enhancing the homogenous charge compression ignition (HCCI) low-temperature combustion system is focused on improving controllability, efficiency and emissions. This article aims to assess the impact of HCCI combustion on the operation of the piston ring system. Utilizing the measured pressures in the combustion chamber of a single-cylinder research engine operating in spark ignition (SI) and HCCI modes at various loads, simulations were carried out using an advanced ring pack model. This model integrates the gas flow, ring dynamics and ring mixed lubrication models. Simulations revealed that differences in the pressure above the piston between the HCCI and SI combustion significantly influence ring pack performance. The predicted energy losses due to the friction of piston rings against the cylinder liner are up to 5% higher in the HCCI engine than in the SI engine. This identified drawback diminishes the advantages of the HCCI engine resulting from higher thermal efficiency, and efforts should be made to minimize this negative impact.

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Section: Introductionmentioning

confidence: 99%