Effects of split injection proportion and the second injection timings on the combustion and emissions of a dual fuel SI engine with split hydrogen direct injection

Li, Guanting; Yu, Xiumin; Shi, Weibo; Yao, Chuanzhao; Wang, Sen; Shen, Qingxu

doi:10.1016/j.ijhydene.2019.02.222

Cited by 38 publications

(9 citation statements)

References 30 publications

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“…Since the flame temperature of hydrogen is higher than gasoline, the NO X emissions increase by 140% with hydrogen addition compared to gasoline [22]. Since the HMD of SHDI is more homogenous, the maximum temperature is less than that of single HDI [27]. Therefore, the NO X emissions with SHDI are fewer by an average of 20% compared to single HDI.…”

Section: Hydrogen Mass Fractionmentioning

confidence: 99%

“…However, the HMD of SHDI is more homogenous and hydrogen can affect the majority zone of the cylinder. As a result, SHDI produces fewer CO and HC emissions than does single HDI [27]. Compared with single HDI, CO and HC emissions with SHDI are respectively reduced by 40% and 72%.…”

Section: Hydrogen Mass Fractionmentioning

confidence: 99%

“…To achieve lower emissions and higher efficiency, a new kind of injection mode was found. In [27], Li et al studied the effects of split injection of hydrogen in the cylinder on engine performance and found that split hydrogen direct injection (SHDI) could achieve the best performance in all kinds of hydrogen injection modes. SHDI could form a better HMD.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Effect of Second Injection Timing on the Engine Performances of a Gasoline/Hydrogen SI Engine with Split Hydrogen Direct Injecting

Sun

et al. 2020

Energies

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Split hydrogen direct injection (SHDI) has been proved capable of better efficiency and fewer emissions. Therefore, to investigate SHDI deeply, a numerical study on the effect of second injection timing was presented at a gasoline/hydrogen spark ignition (SI) engine with SHDI. With an excess air ratio of 1.5, five different second injection timings achieved five kinds of hydrogen mixture distribution (HMD), which was the main factor affecting the engine performances. With SHDI, since the HMD is manageable, the engine can achieve better efficiency and fewer emissions. When the second injection timing was 105° crank angle (CA) before top dead center (BTDC), the Pmax was the highest and the position of the Pmax was the earliest. Compared with the single hydrogen direct injection (HDI), the NOX, CO and HC emissions with SHDI were reduced by 20%, 40% and 72% respectively.

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Section: Hydrogen Mass Fractionmentioning

confidence: 99%

Section: Hydrogen Mass Fractionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study on the Effect of Second Injection Timing on the Engine Performances of a Gasoline/Hydrogen SI Engine with Split Hydrogen Direct Injecting

Sun

et al. 2020

Energies

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“…The increased NOx of GPI+HDI could be controlled by increasing the excess air ratio (e.g. λ=1.5) [128], by using EGR [136] and by split hydrogen injection [169,170]. Yu et al…”

Section: Hydrogen-gasoline Dual Injection Enginesmentioning

confidence: 99%

Dual injection: An effective and efficient technology to use renewable fuels in spark ignition engines

Huang

Surawski

Zhuang

et al. 2021

Renewable and Sustainable Energy Reviews

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Modern spark ignition engines mostly use one injection system to deliver gasoline into the combustion chamber, using either direct injection or port fuel injection. Both technologies have their respective advantages. To integrate their advantages and to promote the use of renewable fuels, dual injection engines are in development in recent years. Dual injection represents an advanced combustion system and is a novel technology to address the urgent issues of sustainability and environmental protection. This study reviews the state-of-the-art research on dual injection spark ignition engines with a focus on renewable fuels, their advantages and engine performance. The main advantages of dual injection include greater control flexibility, enhanced cooling effect, knock mitigation, engine downsizing, extended lean-burn limits, higher thermal efficiency and reductions of several emission species. The most promising renewable fuels for dual injection are ethanol, methanol and hydrogen. Each renewable fuel is aimed at different advantages of dual injection.Alcohol-gasoline dual injection provides great anti-knock ability by taking advantage of alcohols' large enthalpies of vaporisation and high octane numbers, while hydrogen-gasoline dual injection provides extended lean-burn limits by taking advantage of hydrogen's low ignition energy, wide flammability limit and high flame speed. Direct injection of renewable fuels is the optimal injection strategy because it effectively utilises the strong cooling effect of alcohols or avoids the volumetric efficiency reduction and preignition of hydrogen. Dual injection generally demonstrates higher thermal efficiency than single injection.In addition, dual injection effectively reduces particulate emissions while there are usually trade-offs among gaseous emissions.

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“…The value of BSEC increases with the alteration of injection timing and keeps on reducing while the engine is operated with increasing loads. The quality of fuel plays a vital role with the combination of cylinder pressure in deciding the fuel [7,18,19]. The BSEC varies from 18.56 MJ/kWh to 11.57 MJ/kWh for standard injection timing at no load to full load operations, respectively.…”

Section: Brake Specific Energy Consumptionmentioning

confidence: 99%

An experimental investigation on a low heat rejection diesel engine using waste plastic oil with different injection timing

Paranthaman¹,

Dharmalingam²,

Antony³

et al. 2020

Therm sci

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The disposal of waste plastic solids are becoming more than a crisis with respect to environmental safety. Proper disposal system may either be very expensive or leads to side effect. Hence researchers are looking for suitable methods to reuse them. Oils as substitute for petroleum products in internal combustion engines are gaining focus in India, because of its potential to generate large scale employment and relatively low environmental poverty. The present work aims at utilizing this waste plastic oil in a low heat rejection retarded timing engine whose combustion chamber surface is coated with partially stabilized zirconia (PSZ) ceramic. The influence of fuel injection timing was studied to completely understand the waste plastic oil performance in low heat rejection engine. The results revealed great improvement in performance, and emission characteristics. As a compensation, NOx formation was slightly increased. Overall performance of the low heat rejection engine with waste plastic oil fuel was better with 14⁰ bTDC retarded injection time.

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Effects of split injection proportion and the second injection timings on the combustion and emissions of a dual fuel SI engine with split hydrogen direct injection

Cited by 38 publications

References 30 publications

Study on the Effect of Second Injection Timing on the Engine Performances of a Gasoline/Hydrogen SI Engine with Split Hydrogen Direct Injecting

Study on the Effect of Second Injection Timing on the Engine Performances of a Gasoline/Hydrogen SI Engine with Split Hydrogen Direct Injecting

Dual injection: An effective and efficient technology to use renewable fuels in spark ignition engines

An experimental investigation on a low heat rejection diesel engine using waste plastic oil with different injection timing

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