A Modelling Study to Analyse the Compression Ratio Effects on Combustion and Knock Phenomena in a High-Performance Spark-Ignition GDI Engine

Bozza, Fabio; Teodosio, Luigi; Bellis, Vincenzo De; Cacciatore, Diego; Minarelli, Fabrizio; Aliperti, Antonio

doi:10.15866/iremos.v11i3.13771

Cited by 4 publications

(2 citation statements)

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“…However, an excessive increase in CR can lead to higher combustion pressure as well as temperature, and this can induce end-gas auto-ignition. [22][23][24] As the CR increases, there are corresponding alterations in the airow patterns within the engine cylinder, consequently inuencing the cycle-to-cycle variations (CCV). These variations have signicant implications for the overall emission, power, and economic performance of natural gas engines.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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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“…Common technical solutions for SI ICEs include the downsizing coupled to turbocharging [2], innovative valve strategies [3], increased or variable compression ratio (CR) [4,5,6], external cooled exhaust gas recirculation (EGR) [7,8], water injection [9,10], employment of alternative fuels [11,12], and pre-chamber ignition devices [13]. These solutions allow some benefits in the engine performance but they highly depend on the investigated operating conditions [14,15].…”

Section: Introductionmentioning

confidence: 99%

1D numerical study on hydrogen injection enabling ultra-lean combustion in a small gasoline Spark Ignition engine

Teodosio

Pirrello²,

Marchitto

2020

E3S Web Conf.

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This paper deals with the effects of hydrogen port injection on combustion evolution, efficiency and exhaust emissions of a small turbocharged gasoline Spark-Ignition engine through a 1D numerical code. First, the experiments on the base engine architecture are performed at different speeds and at low/medium loads. The experimental findings are used to validate a 1D model of the whole engine, developed within a commercial code. 1D model is also refined with “user-defined” sub-models for an accurate description of the in-cylinder phenomena, namely turbulence, combustion, heat transfer, and emissions. In a second step, 1D model is virtually modified through the installation of an hydrogen injector in each intake runner, while the combustion sub-model also accounts for the impact of hydrogen addition on the laminar flame speed through a dedicated correlation. 1D simulations are performed at low/medium loads and fixed speed of 2250 rpm with 5% of hydrogen by volume in the intake air. Numerical investigations show that hydrogen addition to gasoline/air mixtures allows relevant efficiency benefits (up to a maximum percent gain of 19%), while the NO emissions are almost eliminated. Consequently, hydrogen-boosted combustion represents a potential solution to achieve very high efficiency and reduced pollutant emissions of gasoline spark ignition engines equipped with a conventional combustion system.

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Enhancement of a Hydrogen Engine Cavitation Utilizing Mixed Fuel: a Review and Experimental Case Study

Mustafa

Al-Rawashdeh²,

Hassan³

et al. 2020

IREME

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A Modelling Study to Analyse the Compression Ratio Effects on Combustion and Knock Phenomena in a High-Performance Spark-Ignition GDI Engine

Cited by 4 publications

References 0 publications

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

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

1D numerical study on hydrogen injection enabling ultra-lean combustion in a small gasoline Spark Ignition engine

Enhancement of a Hydrogen Engine Cavitation Utilizing Mixed Fuel: a Review and Experimental Case Study

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