Effect of spark timing on combustion and emissions of a hydrogen direct injection stratified gasoline engine

Shi, Weibo; Yu, Xiumin; Zhang, Henry; Li, Haoyan

doi:10.1016/j.ijhydene.2016.02.060

Cited by 64 publications

(15 citation statements)

References 32 publications

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“…Shi et al (Shi et al 2017) studied the effects of spark timing on the characteristics of combustion and pollutant emissions of a hydrogen DI stratified gasoline engine. The engine used in the experiment was a 1.8 L four-cylinder gasoline engine with the original injection system modified to a hydrogen injection system.…”

Section: Mixing Hydrogen With Conventional Fuels In Icesmentioning

confidence: 99%

An overview of development and challenges in hydrogen powered vehicles

Hosseini

Butler

2019

International Journal of Green Energy

196

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Hydrogen has the potential to be the sustainable fuel of the future, decrease the global dependence on fossil fuel resources, and lower the pollutant emissions from the transportation industry. In this study, recent development in hydrogen-based transportation engines is reviewed to scrutinize the feasibility of using hydrogen as a major fuel of future. Using hydrogen in internal combustion engines achieves only 20-25% efficiency and low power output compared to fossil-fueled internal combustion engines. Although hydrogen-based internal combustion engines have recently received considerable interests, several practical barriers have prevented the fast development of this technology. Hence, at the current stage, using hydrogen as an additive to hydrocarbon fuel systems have been taken into consideration to produce higher performance than hydrogen-only internal combustion engines. Using the dual-fuel strategy can increase the combustion stability and thermal efficiency while decreasing the CO and unburned hydrocarbons emissions, and fuel consumption. Alternatively, hydrogen can be used in fuel cells for vehicular applications with several automotive manufacturers producing fuel cell vehicles currently. Fuel cells can achieve efficiencies of up to 60%, while the rest is lost as heat. Strategies that have been investigated to increase the efficiency, performance, and lifespan of fuel cells are capillary pumping systems, a chemisorption chiller, nanofluids and supercapacitors. All such strategies improved the fuel cells in one or more ways. Safety, hydrogen delivery, onboard storage, and the capital and operating costs of hydrogen powered vehicles are analyzed to approach to clean transportation utopia.

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Section: Mixing Hydrogen With Conventional Fuels In Icesmentioning

confidence: 99%

An overview of development and challenges in hydrogen powered vehicles

Hosseini

Butler

2019

International Journal of Green Energy

196

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“…Heat losses increase and the thermal efficiency of the engine decreases. (Shi et al, 2016) The output parameters of the engine decline for the same reason (Fig. 1).…”

Section: Resultsmentioning

confidence: 71%

Effect of Various Ignition Timings on Combustion Process and Performance of Gasoline Engine

Tunka¹,

Polcar²

2017

Acta Univ. Agric. Silvic. Mendelianae Brun.

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This article deals with the effect of the ignition timing on the output parameters of a spark-ignition engine. The main assessed parameters include the output parameters of the engine (engine power and torque), cylinder pressure variation, heat generation and burn rate. However, the article also discusses the effect of the ignition timing on the temperature of exhaust gases, the indicated mean effective pressure, the combustion duration, combustion stability, etc. All measurements were performed in an engine test room in the Department of Technology and Automobile Transport at Mendel University in Brno, on a four-cylinder AUDI engine with a maximum power of 110 kW, as indicated by the manufacturer. To control and change the ignition timing of the engine, a fully programmable Magneti Marelli control unit was used. The experimental measurements were performed on 8 different ignition timings, from 18 °CA to 32 °CA BTDC at wide throttle open and a constant engine speed (2500 rpm), with a stoichiometric mixture fraction. The measurement results showed that as the ignition timing increases, the engine power and torque also increase. The increase in these parameters is a reflection of higher pressure in the cylinder, the maximum value of which is achieved at a higher ignition timing near top dead centre in thepower stroke. In these conditions we can expect higher engine efficiency. It was also found that the combustion is more stable with a higher value of ignition timing. No significant difference was found in the combustion duration.

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“…Yu et al have done a lot of research on a single hydrogen direct injection (HDI) SI engine in the past few years. According to their studies, the addition of hydrogen can accelerate the flame propagation speed in the cylinder, advance the optimal ignition advance angle and make the combustion completer and more stable, which can significantly reduce the engine's cycle-by-cycle variations [17][18][19][20][21]. With hydrogen, the engine could achieve low HC and CO emissions.…”

Section: Introductionmentioning

confidence: 99%

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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Effect of spark timing on combustion and emissions of a hydrogen direct injection stratified gasoline engine

Cited by 64 publications

References 32 publications

An overview of development and challenges in hydrogen powered vehicles

An overview of development and challenges in hydrogen powered vehicles

Effect of Various Ignition Timings on Combustion Process and Performance of Gasoline Engine

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

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