Numerical study on the effects of intake charge on oxy-fuel combustion in a dual-injection spark ignition engine at economical oxygen-fuel ratios

Li, Xiang; Pei, Yiqiang; Peng, Zhijun; Ajmal, Tahmina; Rana, Khaqan-Jim; Aïtouche, Abdel; Mobasheri, Raouf

doi:10.1177/14680874211022292

Cited by 5 publications

(2 citation statements)

References 57 publications

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“…Over the last decade, Wu et al − provided valuable inputs into OFC research, which indicated that the power, fuel economy, and emissions could be improved through optimization strategies in the ICRC port fuel injection (PFI) engine fueled with propane. Li et al , explored the potential of the intake charge to optimize combustion and performance of the OFC SI engine fueled with gasoline.…”

Section: Introductionmentioning

confidence: 99%

Implementation of Oxy-Fuel Combustion (OFC) Technology in a Gasoline Direct Injection (GDI) Engine Fueled with Gasoline–Ethanol Blends

Pei

et al. 2021

ACS Omega

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Nowadays, to mitigate the global warming problem, the requirement of carbon neutrality has become more urgent. Oxy-fuel combustion (OFC) has been proposed as a promising way of carbon capture and storage (CCS) to eliminate carbon dioxide (CO 2 ) emissions. This article explores the implementation of OFC technology in a practical gasoline direct injection (GDI) engine fueled with gasoline−ethanol blends, including E0 (gasoline), E25 (25% ethanol, 75% is gasoline in mass fraction), and E50 (50% ethanol, 50% is gasoline in mass fraction). The results show that with a fixed spark timing, φ CA50 (where 50% fuel is burned), of E50 and E25 is about 4.5 and 1.9°later than that of E0, respectively. Ignition delay (θ F ) and combustion duration (θ C ) can be extended with the increase of the ethanol fraction in the blended fuel. With the increase of the oxygen mass fraction (OMF) from 23.3 to 29%, equivalent brake-specific fuel consumption (BSFC E ) has a benefit of 2.12, 1.65, and 1.51% for E0, E25, and E50, respectively. The corresponding increase in brake-specific oxygen consumption (BSOC) is 21.83, 22.42, and 22.58%, respectively. Meanwhile, θ F , θ C , and the heat release rate (HRR) are not strongly affected by the OMF. With the increase of the OMF, the increment of θ F is 0.7, 1.8, and 2.2°for E0, E25, and E50, respectively. θ C is only extended by 1, 1.1, and 1.4°, respectively. Besides, by increasing the intake temperature (T I ) from 298 to 358 K under all of the fuel conditions, BSFC E and BSOC present slight growth trends; θ F and θ C are slightly reduced; in the meantime, φ CA50 , φ Pmax (crank angle of peak cylinder pressure), and the position of the HRR peak are advanced by nearly 1°.

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Section: Introductionmentioning

confidence: 99%

Implementation of Oxy-Fuel Combustion (OFC) Technology in a Gasoline Direct Injection (GDI) Engine Fueled with Gasoline–Ethanol Blends

Pei

et al. 2021

ACS Omega

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“…Thermal efficiency and indicated work could be enhanced by an appropriate rate of EGR matches with ignition timing and increased WI temperature. Li et al [26] initially investigated the impacts of intake charge on OFC in a dual-injection SI engine fuelled with gasoline under GDI, P-G and PFI three injection strategies.…”

Section: Introductionmentioning

confidence: 99%

Effects of Water Injection Strategies on Oxy-Fuel Combustion Characteristics of a Dual-Injection Spark Ignition Engine

Pei

et al. 2021

Energies

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Currently, global warming has been a serious issue, which is closely related to anthropogenic emission of Greenhouse Gas (GHG) in the atmosphere, particularly Carbon Dioxide (CO2). To help achieve carbon neutrality by decreasing CO2 emissions, Oxy-Fuel Combustion (OFC) technology is becoming a hot topic in recent years. However, few findings have been reported about the implementation of OFC in dual-injection Spark Ignition (SI) engines. This work numerically explores the effects of Water Injection (WI) strategies on OFC characteristics in a practical dual-injection engine, including GDI (only using GDI), P50-G50 (50% PFI and 50% GDI) and PFI (only using PFI). The findings will help build a conceptual and theoretical foundation for the implementation of OFC technology in dual-injection SI engines, as well as exploring a solution to increase engine efficiency. The results show that compared to Conventional Air Combustion (CAC), there is a significant increase in BSFC under OFC. Ignition delay (θF) is significantly prolonged, and the spark timing is obviously advanced. Combustion duration (θC) of PFI is a bit shorter than that of GDI and P50-G50. There is a small benefit to BSFC under a low water-fuel mass ratio (Rwf). However, with the further increase of Rwf from 0.2 to 0.9, there is an increment of 4.29%, 3.6% and 3.77% in BSFC for GDI, P50-G50 and PFI, respectively. As WI timing (tWI) postpones to around −30 °CA under the conditions of Rwf ≥ 0.8, BSFC has a sharp decrease of more than 6 g/kWh, and this decline is more evident under GDI injection strategy. The variation of maximum cylinder pressure (Pmax) and combustion phasing is less affected by WI temperature (TWI) compared to the effects of Rwf or tWI. BSFC just has a small decline with the increase of TWI from 298 K to 368 K regardless of the injection strategy. Consequently, appropriate WI strategies are beneficial to OFC combustion in a dual-injection SI engine, but the benefit in fuel economy is limited.

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Improvement in engine thermal management by changing coolant and oil mass

Broatch

Olmeda

Martín

et al. 2022

Applied Thermal Engineering

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Numerical study on the effects of intake charge on oxy-fuel combustion in a dual-injection spark ignition engine at economical oxygen-fuel ratios

Cited by 5 publications

References 57 publications

Implementation of Oxy-Fuel Combustion (OFC) Technology in a Gasoline Direct Injection (GDI) Engine Fueled with Gasoline–Ethanol Blends

Implementation of Oxy-Fuel Combustion (OFC) Technology in a Gasoline Direct Injection (GDI) Engine Fueled with Gasoline–Ethanol Blends

Effects of Water Injection Strategies on Oxy-Fuel Combustion Characteristics of a Dual-Injection Spark Ignition Engine

Improvement in engine thermal management by changing coolant and oil mass

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