Digital Twin Spark Ignition for Improved Fuel Economy and Emissions on Four Stroke Engines

Ramtilak, A.; Joseph, A.; Sivakumar, G.; Bhat, S. S.

doi:10.4271/2005-26-008

Cited by 25 publications

(10 citation statements)

References 1 publication

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“…For example, Ramtilak A. [3] in his work describes the Digital Twin Spark Ignition (DTS-i) model successfully launched on two products -150 DTS-i and 180 DTS-i. The main purpose of these models is to improve the characteristics of four-stroke cycle engines in a wide area of usage and to comply with the 2005 emission standard in India.…”

Section: Introductionmentioning

confidence: 99%

Methods of computational modeling of coronary heart vessels for its digital twin

Naplekov

Zheleznikov

Pashchenko

et al. 2018

MATEC Web of Conferences

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Abstract. In this work, methods of numerical modelling of the coronary vessels system of the human heart have been studied. This investigation includes transient flow of the liquid -blood and dynamics of zones of shear stress at vessels. The main goal of the research is obtaining of hemodynamic and shear stress for creating the digital twin of coronary heart vessels. The results were obtained for low Reynolds numbers about 20 of three-dimensional laminar flow. With this Reynolds number the turbulent flow of the blood is modelled by Realizable k-ε model, and SST models to the narrowing, expansions, and blocks inside the vessels. Loads caused by the additional energy consumption because of the turbulent flow of the blood (increase in arterial blood pressure) have been analyzed. A twodimensional model of a separated vessel with fixed blood back-flow prevention is developed. Presence of a turbulent flow core is discovered. By the means of stress-strain properties of the model, visual representation of the wearing process of the blood back-flow preventer, and heart diseases progression is obtained.

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Section: Introductionmentioning

confidence: 99%

Methods of computational modeling of coronary heart vessels for its digital twin

Naplekov

Zheleznikov

Pashchenko

et al. 2018

MATEC Web of Conferences

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“…Gravimetric energy content (kJ/kg) 3758 959 3013 Volumetric energy content (kJ/m 3 ) 3189 1024 3704 # Mixture properties of hydrogen-air, methane-air, and iso-octane-air. Data given at 300K and 1 atm Ramtilak et al [17] compared performance of single spark and twin-spark on gasoline engine. With twin spark plug configuration it has helped to increase compression and allowed to test at relative air fuel ratio (lambda) of 1.2 (leaner condition).…”

Section: Introductionmentioning

confidence: 99%

Effect of excess air ratio and ignition timing on performance, emission and combustion characteristics of high speed hydrogen engine

Shinde

Karunamurthy

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The main goal of automobile researchers is to develop internal combustion engines that are fuel efficient and emit zero pollutants. It can be inferred from prior research publications that lean burn conditions can significantly reduce emissions while improving engine efficiency. The lean-burn engine combustion temperatures are lower hence harmful emissions like NO are reduced. Gasoline fuels have a narrow equivalence ratio window hence it was necessary to evaluate the other alternative fuels with a wider equivalence ratio for using it in IC engines for better performance and fewer emissions. This experiment is conducted on a single-cylinder digital three-spark ignited electronic fuel injected (DTSI-EFI) single-cylinder, 4 stroke high-speed SI engine fuelled by hydrogen. The excess air ratios are changed and MBT timing was also optimized. Hydrogen has delivered the lowest emissions under lean conditions. This data gives guidelines for developing SI engines with hydrogen port fuel injection for meeting future emissions norms. This experimental attempt is to protect the environment from greenhouse gas (GHG) emissions. The highest Brake Thermal Efficiency (BTE) is recorded at the leaner condition (λ = 4) as 37.53%, the highest power output is 7.02 kW at λ=1.5. CO and THC emissions are absent in hydrogen fuel and NO emissions reduces towards lean combustion.

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“…However, due to the low energy content per unit mass of the mixture in the mildly homogeneous lean burn state, the flame propagation speed becomes slower and the cyclic variation becomes more intense. Multipoint ignition may be a potential technology to improve this phenomenon. − Long-term practice has shown that double-spark plug ignition can significantly shorten the combustion duration, reduce cyclic variation, and expand the combustion limit. − Migita et al used twin-spark plugs located in a diagonal position and controlled the ignition timing in sequence to achieve rapid combustion. Forte et al found that at a part load condition, a sensible reduction of cycle-by-cycle variability of indicated mean effective pressure was achieved by twin-spark, and at a full load condition, the twin-spark showed an increase of power.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation about the Effect of Double-Spark Plug Ignition on Combustion Characteristics for Motorcycle Gasoline Engines with a Mild Lean Mixture

et al. 2022

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To investigate the effect of double-spark plug ignition (DSI) on the mild lean combustion characteristics of motorcycle gasoline engines, three combustion modes were set up on a gasoline engine for testing, namely, the single-spark plug ignition (SSI) stoichiometric combustion mode (λ = 1, λ represents the excess air coefficient), the DSI stoichiometric combustion mode (λ = 1), and the DSI mild lean combustion mode (λ = 1.1). The results show that the double-spark plug ignition as that in the DSI mild lean combustion mode and DSI stoichiometric combustion mode is more prominent in accelerating the combustion process, reducing the cyclic variation, and improving the lean burn stability. It is verified that the overall effect of double-spark plug ignition on accelerating mildly homogeneous lean combustion is mainly reflected during the early period of rapid burning, which improves the stability of mildly homogeneous lean combustion and extends the lean burn limit. Further, the bench test shows that at a moderate load, the DSI mild lean combustion mode can result in lower brake-specific fuel consumption (BSFC) compared to that of the DSI stoichiometric combustion mode. When using the DSI mild lean combustion mode, the fuel economy can be improved by about 3−6% compared to that when using the SSI stoichiometric combustion mode. And the emission reduction can also be clearly observed when using a three-way catalyst containing rare-earth materials. However, at a low load, limited by combustion stability, for the DSI mild lean combustion mode, λ should not exceed 1.05.

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Digital Twin Spark Ignition for Improved Fuel Economy and Emissions on Four Stroke Engines

Cited by 25 publications

References 1 publication

Methods of computational modeling of coronary heart vessels for its digital twin

Methods of computational modeling of coronary heart vessels for its digital twin

Effect of excess air ratio and ignition timing on performance, emission and combustion characteristics of high speed hydrogen engine

Experimental Investigation about the Effect of Double-Spark Plug Ignition on Combustion Characteristics for Motorcycle Gasoline Engines with a Mild Lean Mixture

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