A novel twin injector strategy for direct cylinder barrel injection of LPG in a 2S-SI engine

Pradeep, V.; Ramesh, A.

doi:10.1016/j.fuel.2015.08.070

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…For the industrial application of twin injectors on the engines, many scholars have researched it and proposed many advanced combustion modes. Pradeep and Ramesh 16 applied a twin-injector strategy on a two-stroke spark ignition engine fueled with liquified petroleum gas. Li et al 17 proposed a new dual-fuel combustion mode, named intelligent charge compression ignition.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the effect of various collision angles and critical conditions on marine engine’s twin-spray collision process

Xia

Zhang

Wang

et al. 2022

International Journal of Engine Research

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To enhance the fuel-gas mixing and phase transition process, the fuel is injected by twin injectors in a large-bore low-speed two-stroke marine engine, while the cylinder condition has reached the transcritical and supercritical conditions. The twin-injector configuration has a great potential for further optimization, but the exploration on the outcome of collision and phase transition was still limited. Therefore, this work aims to study the effect of various collision angles (60°, 90°, 120°, 150°) and critical conditions (sub/trans/supercritical) on the twin-spray collision process using optical techniques. A wide range of experimental cases are conducted to provide an analysis and database for future modeling validation. The post-collisional spray structures, spatial distribution, and periphery features are analyzed to characterize the droplet’s collision. The results show that with the collision angle increasing, the higher collision velocity enhances the mass transfer while the minor vertical component results in a smaller axial dispersion. Because of the trade-off relationship between the vertical velocity component and pre-collision penetration, a higher reduction in droplet momentum results in a slighter collision behavior. At the collision angle of 150°, the subcritical condition tends to result in an off-axis collision. Under the transcritical (P) condition, the probability of head-on collision increases and presents a wider spatial distribution. But under the supercritical condition, because of the existence of the liquid collision, the thermal conversion among phases is accelerated, while the ambient resistance is reduced. Moreover, an exponential correlation of collision liquid length is formulated to predict the axial dispersion based on various critical conditions.

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Section: Introductionmentioning

confidence: 99%

Experimental study of the effect of various collision angles and critical conditions on marine engine’s twin-spray collision process

Xia

Zhang

Wang

et al. 2022

International Journal of Engine Research

View full text Add to dashboard Cite

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“…Scholars have done many researches on the subject of LPG engine emissions [2][3][4][5]. However, the researches mainly have focused on the steady-state emissions behavior of LPG engine, with much less attention paid to the emissions behavior under transient operating conditions, especially accelerat ion and deceleration.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of HC Emission Behavior from a Lean Burn LPG Engine during Transient Operating Conditions

Zhang

2017

MATEC Web Conf.

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Abstract. Based on engine bench test system, the HC emission behavior of a lean burn LPG engine during constant speed and changing (increasing an d de creasing) torque transient conditions was investigated. Results show that HC is significantly deteriorated under the experimental operating conditions. HC concentration value is higher than the steady-state value by 2.3% an d 14.2%, respectively. T he response of the actual torque lags behind the desired torque by 2.047s and 2.109s, respectively, and leads to the actual speed deviates from the desired value by 4.5% and 3.7%. T he deviation of the actual speed causes the fluctuations of IAA, which is the key reason for the deterioration of HC under increasing torque operation. The control of fuel valve cannot meet the demand of the actual LPG mass durin g the transient operating conditions, leads to the actual LPG mass value deviate from the target value by 4.7% and 8.8%, respectively. And this is also the main responsibility for the actual AFR deviate from the target value by 5.1% and 8.2%, respectively. During the decreasing torque operation, caused by the deviation of the actual AFR, the mixture is too rich, which results in the deterioration of HC.

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“…The modern control system of ignition should therefore include a feedback responsive to changing operating parameters of the engine. The most important of these parameters are: engine crankshaft speed and the quality and quantity of the air-fuel mixture in the cylinder, expressed in form of the engine load or cylinder combustion air factor [Pradeep et al 2015].…”

Section: Introductionmentioning

confidence: 99%

The influence of the ignition system characteristic on the two-stroke engine operating conditions

Fiedkiewicz

Cieślik

Pielecha

2016

JMTE

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This paper presents an indicator analysis of the impact of the characteristics of an electronic ignition system on the operating conditions of a two-stroke spark ignition engine. The tests were carried out on a single-cylinder two-stroke engine equipped with a combustion pressure sensor using the apparatus for recording fast-varying signals. The influence of changes of the ignition angle of advance at constant engine speeds on the engine operating indicators was analysed. The assessment of the impact of the changes to the settings of the ignition system was analysed in terms of thermodynamic conditions: combustion pressure and average effective pressure. It was found that the ignition angle of advance has positive influence on engine operating conditions and uniformity of engine operation. As a measure of non-uniformity of engine operation were accepted the coefficient of variation of the engine speed and the mean indicated pressure. It was indicated that, along with the ignition angle of advance, the indicators of two-stroke engine operation also increase with simultaneous increase in the non-uniformity of engine operation.

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A novel twin injector strategy for direct cylinder barrel injection of LPG in a 2S-SI engine

Cited by 8 publications

References 20 publications

Experimental study of the effect of various collision angles and critical conditions on marine engine’s twin-spray collision process

Experimental study of the effect of various collision angles and critical conditions on marine engine’s twin-spray collision process

Experimental Analysis of HC Emission Behavior from a Lean Burn LPG Engine during Transient Operating Conditions

The influence of the ignition system characteristic on the two-stroke engine operating conditions

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