Ignition Delay in Diesel Engines

Henein, Naeim A.; Bolt, Jay A.

doi:10.4271/670007

Cited by 33 publications

(12 citation statements)

References 13 publications

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“…The ignition delay in a diesel engine was defined as the time (or crank angle) between the start of ftiel injection into the combustion chamber and the start of combustion The start of injection is usually taken as the time when the injector needle lifts off Its seat (determined fi'om the injection pressure data) The stan of combustion is more difficult to determine precisely Henein and Bolt [58] defme three possible definitions of ignition delay The first is the illumination delay, the second is the temperature rise delay and the last is the pressure rise delay The illumination delay is defined as the time between the start of injection to the stan of the luminous flame in the engine. Temperature rise delay is the time from the start of injection to a specified cylinder-averaged temperature rise due to combustion.…”

Section: Calculation Of Ignition Delaymentioning

confidence: 99%

The effect of biodiesel oxidation on engine performance and emissions

Monyem

Gerpen

2001

Biomass and Bioenergy

586

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Section: Calculation Of Ignition Delaymentioning

confidence: 99%

The effect of biodiesel oxidation on engine performance and emissions

Monyem

Gerpen

2001

Biomass and Bioenergy

586

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“…Tenggang waktu dari periode injeksi solar sampai terjadinya titik api yang mula-mula disebut ignition delay. Ignition delay adalah suatu parameter yang sangat mempengaruhi dari awal sampai akhir proses pembakaran di dalam silinder mesin diesel, oleh sebab itu sangat mempengaruhi performa dan emisi gas buang mesin, sehingga dari dahulu telah banyak penelitian [1][2][3][4][5][6][7][8][9][10][11] dilakukan. Dewasa ini, telah banyak riset terhadap mesin diesel berbahan bakar ganda, yang memungkinkan bahan bakar gas (BBG), seperti; Liquified Petroleum Gas, Compressed Natural Gas, dan lain-lain, dipakai sebagai bahan bakar utama [12][13][14][15][16][17].…”

Section: Pendahuluanunclassified

Prediksi Ignition Delay Mesin Diesel Berbahan Bakar Ganda

Siagian¹,

Silaban²

2013

jtm

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ABSTRAKPada mesin diesel ada tenggang waktu antara sejak dimulainya penginjeksian solar (periode injeksi) ke dalam silinder bakar mesin, kemudian terbentuk campuran udara+embun solar sampai terjadi titik api yang mula-mula atau periode pengapian. Tenggang waktu atau keterlambatan pengapian ini disebut ignition delay. Ignition delay adalah suatu parameter yang sangat berpengaruh terhadap awal sampai akhir proses pembakaran di dalam silinder bakar mesin, oleh sebab itu sangat menentukan performa dan emisi gas buang mesin. Pada pengujian di sini, sebagai mesin berbahan bakar ganda.Bahan Bakar Gas (BBG), yaitu; propana, metana, dan hidrogen masing-masing dialirkan ke dalam silinder bakar mesin diesel konvensional, setelah bercampur dengan udara oleh sebuah mixer yang ditempatkan di dalam intake port. Kemudian bahan bakar solar disemprotkan langsung ke dalam silinder mesin dengan jumlah kecil (hanya sebagai pemicu api saja), dan ignition delay solar yang diinjeksikan tersebut dengan periode injeksi yang bervariasi dianalisis dan dievaluasi. Pada penelitian ini telah dilakukan dan ditemukan model perhitungan untuk memprediksi ignition delay, yaitu dengan menerapkan persyaratan autoignition Livengood-Wu (Livengood dan Wu, 1955). Dengan didapatkannya model perhitungan untuk memprediksi ignition delay ini maka diharapkan dapat mempermudah dan meningkatkan akurasi hasil yang didapat di dalam penelitian pada level simulasi khususnya pada bidang mesin diesel.Kata kunci: Keterlambatan pengapian, periode injeksi, periode pengapian, prediksi, bahan bakar ganda. Livengood-Wu (Livengood and Wu, 1955 ABSTRACT In diesel engines there is the lag time between injection of diesel fuel since the beginning (injection period) into the cylinder combustion engine, then formed a mixture of air +moisture diesel until there is a point which first fire or ignition period. The grace period or ignition delay is called the ignition delay. Ignition delay is a parameter that greatly affects the beginning to the end of the process of fuel combustion in the engine cylinder and therefore determine the performance and engine exhaust emissions. In testing here, as a dual-fuel engines, fuel gas, namely propane, methane, and hydrogen respectively supplied to the cylinder combustion conventional diesel engines, after mixing with air by a mixer placed in the intake ports. Then the diesel fuel is sprayed directly into the cylinder machine with a small amount (just as the trigger fires only), and the ignition delay of diesel fuel is injected with variable injection period is analyzed and evaluated. In this study has been carried out and found the model calculations to predict the ignition delay, ie by applying the requirements of auto ignition PENDAHULUANPada mesin diesel ada tenggang waktu antara sejak dimulainya penginjeksian solar (periode injeksi), kemudian meningkatnya tekanan dan temperatur sampai batas tertentu akibat gerakan menekan dari piston maka campuran udara + solar di dalam ruang bakar mesin mengalami terjadinya titik api yang mula-mula sehin...

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“…The engine, equipment, and the instrumentation used, including measurement of the ignition delay period, are described in reference (21). In general, the ignition delay was measured from the beginning of fuel nozzle opening to the beginning of illumination or pressure rise due to combustion.…”

Section: Equipment Usedmentioning

confidence: 99%

“…A study of these criteria showed that they do not occur simultaneously, and therefore the corresponding ignition delays are not necessarily equal. The authors (21) proposed to identify each of the ignition delays with a subscript that indicates the criteria used for its measurement. In the present paper two delay periods are studied: the pressure rise delay, I.D., and the illumination delay, I.D.il.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Some Engine Variables on Ignition Delay and Other Combustion Phenomena in a Diesel Engine

Bolt

Henein

1969

Proceedings of the Institution of Mechanical Engineers, Confere

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Measurements of ignition delay and other combustion phenomena were made on a single-cylinder, openchamber, supercharged research diesel engine. The influence of engine speed, fuel/air ratio, and air-charge pressure are reported. The results show that the elapsed time from the start of injection until illumination occurs is longer than that for pressure rise due to combustion. As expected, the measured ignition delay is decreased with increased speed. However, when a correction was made for cylinder air temperature change due to speed, the ignition delay increased with speed. Increase in the fuel/air ratio decreased the measured ignition delay. However, when corrected, the ignition delay was unaffected by fuel/air ratio. The smoke increased with engine speed and fuel/air ratio. References are given in Appendix 13. I .section of the pressure traces for the engine during motoring and firing (IS), or the combustion of a certain

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Ignition Delay in Diesel Engines

Cited by 33 publications

References 13 publications

The effect of biodiesel oxidation on engine performance and emissions

The effect of biodiesel oxidation on engine performance and emissions

Prediksi Ignition Delay Mesin Diesel Berbahan Bakar Ganda

The Effect of Some Engine Variables on Ignition Delay and Other Combustion Phenomena in a Diesel Engine

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