Numerical investigation of CAI Combustion in the Opposed- Piston Engine with Direct and Indirect Water Injection

Pyszczek, Rafał; Mazuro, Paweł; Teodorczyk, A.

doi:10.1088/1757-899x/148/1/012083

Cited by 2 publications

(1 citation statement)

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“…To achieve HCCI combustion, engine designs incorporate different compression ratios, intake air preheating as well as the application of unconventional mechanical designs [3]. HCCI combustion can also be achieved by the application of exhaust gas trapping during an exhaust stroke via negative valve overlap (NVO).…”

Section: Introductionmentioning

confidence: 99%

Metrology and Measurement Systems

Hunicz¹,

Filipek²,

Sobiesiak³

2018

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This study examines the application of ion current measurements to the identification of heat release parameters inside the combustion chamber of a homogeneous charge compression ignition (HCCI) engine fuelled with gasoline. HCCI combustion was achieved with the use of exhaust gas trapping. Combustion parameters derived from the in-cylinder pressure and ion current measurements were compared and analysed. Ion current measurements were accomplished using the existing spark plug and a dedicated electronic circuit. The experiments were performed at a variable excess air ratio and a variable amount of trapped residuals. The results showed a good correlation between peak values of the ion current and heat release rate, except for the cases where a fuel-rich mixture was burnt. The computed ion current integral over the volume of the combustion chamber showed a good agreement with the heat released in the combustion chamber, however this parameter was found to be affected by the amount of trapped residuals. Combustion timing characteristic values computed using heat release and ion current were found to be correlated, however the relationship was not linear.

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Section: Introductionmentioning

confidence: 99%