Knock and Cycle by Cycle Analysis of a High Performance V12 Spark Ignition Engine. Part 1: Experimental Data and Correlations Assessment

Bellis, Vincenzo De; Teodosio, Luigi; Siano, Daniela; Minarelli, Fabrizio; Cacciatore, Diego

doi:10.4271/2015-24-2392

Cited by 16 publications

(5 citation statements)

References 27 publications

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“…A slightly better prediction is realized for the CoVIMEP. In agreement with the experimental literature [35], Figure 13 confirms that IMEP cyclic dispersion is lower than the corresponding in-cylinder pressure peak cyclic dispersion. Referring to the CoV IMEP , higher values for delayed combustions are obtained (Figure 11a).…”

Section: Experimentally-derived Correlations For Cyclic Dispersion Ansupporting

confidence: 91%

“…As an example, the following Figure 9a Similar considerations can be applied to the other analyzed points of the spark timing sweep (Table 2), but the related experimental outcomes are not reported here for sake of brevity. In addition, as already demonstrated in a previous authors' work [35], the CoV trend does not substantially depend on the engine speed. On the other hand, the cycle-to-cycle variation shows a certain dependency on the combustion-related parameters, i.e., combustion phasing and characteristic duration.…”

Section: Experimentally-derived Correlations For Cyclic Dispersion Ansupporting

confidence: 83%

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Individual Cylinder Combustion Optimization to Improve Performance and Fuel Consumption of a Small Turbocharged SI Engine

Marchitto¹,

Tornatore²,

Teodosio³

2020

Energies

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Stringent exhaust emission and fuel consumption regulations impose the need for new solutions for further development of internal combustion engines. With this in mind, a refined control of the combustion process in each cylinder can represent a useful and affordable way to limit cycle-to-cycle and cylinder-to-cylinder variation reducing CO2 emission. In this paper, a twin-cylinder turbocharged Port Fuel Injection–Spark Ignition engine is experimentally and numerically characterized under different operating conditions in order to investigate the influence of cycle-to-cycle variation and cylinder-to-cylinder variability on the combustion and performance. Significant differences in the combustion behavior between cylinders were found, mainly due to a non-uniform effective in-cylinder air/fuel (A/F) ratio. For each cylinder, the coefficients of variation (CoVs) of selected combustion parameters are used to quantify the cyclic dispersion. Experimental-derived CoV correlations representative of the engine behavior are developed, validated against the measurements in various speed/load points and then coupled to an advanced 1D model of the whole engine. The latter is employed to reproduce the experimental findings, taking into account the effects of cycle-to-cycle variation. Once validated, the whole model is applied to optimize single cylinder operation, mainly acting on the spark timing and fuel injection, with the aim to reduce the specific fuel consumption and cyclic dispersion.

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Section: Experimentally-derived Correlations For Cyclic Dispersion Ansupporting

confidence: 91%

Section: Experimentally-derived Correlations For Cyclic Dispersion Ansupporting

confidence: 83%

Individual Cylinder Combustion Optimization to Improve Performance and Fuel Consumption of a Small Turbocharged SI Engine

Marchitto¹,

Tornatore²,

Teodosio³

2020

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…A related study by De Bellis et al indicated that the peak cylinder pressure and the COV IMEP correlated well with the CA50 (crank angle at 50% of the total heat release) and combustion duration (the crank angle sustained by the total heat release from 10% to 90%). 47 As shown in Fig. 7(b), the higher the CR, the less time from ignition to CA10 (crank angle where the fuel mass burning rate reached 10%), which is equivalent to the shorter ignition delay period.…”

Section: Resultsmentioning

confidence: 89%

Effect of high compression ratio on cycle-to-cycle variations of a natural gas engine under low load conditions

Qin,

Zhang,

Chen

et al. 2023

Sustainable Energy Fuels

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“…A bandpass filter of 3 -10 kHz was then applied, and the peak-to-peak variation of the filtered pressures was used to determine the knock intensity. A cycle was deemed to be knocking if the peak-to-peak oscillation exceeded a threshold value, which was set at 0.5 bar at 1000 -3000 RPM and linearly increased to 1 bar at 5000 RPM due to stronger background noise at high engine speeds [32]. This threshold setting does not affect the K determination using the PRF method, as observed previously [24].…”

Section: Engine Operation and Knock Detectionmentioning

confidence: 92%

Mapping K factor variations and its causes in a modern, spark-ignition engine

Zhou

Kar

Yang

et al. 2021

Fuel

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Knock and Cycle by Cycle Analysis of a High Performance V12 Spark Ignition Engine. Part 1: Experimental Data and Correlations Assessment

Cited by 16 publications

References 27 publications

Individual Cylinder Combustion Optimization to Improve Performance and Fuel Consumption of a Small Turbocharged SI Engine

Individual Cylinder Combustion Optimization to Improve Performance and Fuel Consumption of a Small Turbocharged SI Engine

Effect of high compression ratio on cycle-to-cycle variations of a natural gas engine under low load conditions

Mapping K factor variations and its causes in a modern, spark-ignition engine

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