Cycle-to-Cycle Variation Study of an SI Engine Fired by Spark Plug and a Non Conventional Device

Robinet, Cyril; Andrzejewski, J.; Higelin, Pascal

doi:10.4271/972986

Cited by 20 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several studies have pointed out CCVs could be influenced by initial flame development greatly [18,19]. Significant decrease in CCV can be achieved when initial flame development rate is well enhanced.…”

Section: Combustion Duration Datamentioning

confidence: 97%

“…For example, cycles which have a higher burn rate than average may have over advanced ignition timing and thus higher NO x emissions as well as higher knock tendency. However, other cycles with lower burn rate may have over retarded ignition timing which is not good for the completeness and stability of combustion [19]. Fluctuation of combustion phasing, which is of high importance to engine efficiency [21] and emissions, is in fact reduced by hydrogen addition.…”

Section: Combustion Duration Datamentioning

confidence: 98%

See 1 more Smart Citation

Effects of hydrogen addition on cycle-by-cycle variations in a lean burn natural gas spark-ignition engine

Wang

Liu

et al. 2008

International Journal of Hydrogen Energy

249

View full text Add to dashboard Cite

Section: Combustion Duration Datamentioning

confidence: 97%

Section: Combustion Duration Datamentioning

confidence: 98%

Effects of hydrogen addition on cycle-by-cycle variations in a lean burn natural gas spark-ignition engine

Wang

Liu

et al. 2008

International Journal of Hydrogen Energy

249

View full text Add to dashboard Cite

“…9 we can find that the coefficient of variation of indicated mean effective pressure decreases as the compression ratio increases at the same spark timing. Several studies have pointed out that coefficient of variations (COV) can be influenced by initial flame development greatly [16,17]. Significant decrease in COV can be achieved when initial flame development rate is well enhanced.…”

Section: Resultsmentioning

confidence: 99%

Effect of compression ratio and spark timing on the power performance and combustion characteristics of an HCNG engine

Zhao

et al. 2012

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

“…As mentioned before, there is always an optimized combustion phasing for best efficiency, which is determined from the average cycle; therefore, this constant situation may not adapt for each individual cycle. Thus, cyclic combustion variations, which make each cycle burn in a different way, would undermine fuel economy …”

Section: Resultsmentioning

confidence: 99%

Effects of Combustion Phasing, Combustion Duration, and Their Cyclic Variations on Spark-Ignition (SI) Engine Efficiency

Wang

et al. 2008

Energy Fuels

View full text Add to dashboard Cite

A zero-dimensional two-zone model was employed to investigate the influence of the combustion process of the spark-ignition (SI) engine on its thermal efficiency. Attention was mainly paid to the effects of combustion phasing, combustion duration, and their cyclic variations. These combustion parameters were varied by changing spark timing and the hydrogen/natural gas blending ratio (hydrogen and natural gas mixtures were used as the fuel). The results show that there always exists an optimized combustion phasing for best engine thermal efficiency. Combustion phasing that deviates from this optimized value would decrease thermal efficiency. The fact that heat transfer loss increases with the advance of combustion phasing was thought to be the reason why best efficiency thermal efficiency does not occur under the condition when the combustion rate peaks at TDC. It is also found unexpectedly that although reduction in combustion duration can increase the degree of constant volume combustion, it does not have obviously positive effects on the final thermal efficiency. Finally, with regard to the cyclic variations, it is concluded that cyclic variations in the combustion process exert a heavy effect on thermal efficiency. The higher the variations, the larger the negative effect.

show abstract

Cycle-to-Cycle Variation Study of an SI Engine Fired by Spark Plug and a Non Conventional Device

Cited by 20 publications

References 11 publications

Effects of hydrogen addition on cycle-by-cycle variations in a lean burn natural gas spark-ignition engine

Effects of hydrogen addition on cycle-by-cycle variations in a lean burn natural gas spark-ignition engine

Effect of compression ratio and spark timing on the power performance and combustion characteristics of an HCNG engine

Effects of Combustion Phasing, Combustion Duration, and Their Cyclic Variations on Spark-Ignition (SI) Engine Efficiency

Contact Info

Product

Resources

About