ارزیابی میزان پاشش در سوزن های انژکتور سیستم سوخت رسانی ریل مشترک دیزلی با روش بوش

فروزنده نسب, مجتبی; خسروانی, محمدکاظم

doi:10.48301/kssa.2024.470891.2962

ارزیابی میزان پاشش در سوزن های انژکتور سیستم سوخت رسانی ریل مشترک دیزلی با روش بوش

نوع مقاله : مقاله پژوهشی (کاربردی)

نویسندگان

مجتبی فروزنده نسب ¹

محمدکاظم خسروانی ²

¹ عضو هیئت علمی، گروه مهندسی کشاورزی، دانشگاه ملی مهارت، تهران، ایران.

² دانش‌آموخته مهندسی برق، دانشگاه ملی مهارت، تهران، ایران.

10.48301/kssa.2024.470891.2962

چکیده

این پژوهش با هدف بررسی تغییرات فشار و اثر نوع سوخت بر میزان پاشش سوخت در واحد زمان برروی موتورهای دیزلی با پاشش مستقیم مجهز به سیستم ریل مشترک و با استفاده از دستگاه اندازه گیری بوش انجام شد.در مرحله نخست از سوزن‌های انژکتور تک سوراخه در فشارهای معکوس(فشار نفوذ هوای فشرده شده محفظه احتراق به درون سوزن انژکتور در زمان باز شدن سوزن) 60 و 100 بار استفاده گردید و در فشارهای مختلف مقدارسوخت اندازه گیری و ثبت شدکه نتیجه به صورت رابطه خطی فشار و مقدار تزریق با خطوط برازش با حداکثر دقت 98/0 استخراج گردید. در مرحله دوم از سوزن‌های انژکتور 8 سوراخه استفاده شد. در فشارهای معکوس 60 و 100 بار نمودار فشار و مقدار سوخت استخراج گردید، که تحلیل این نمودار نوسانی حاکی از مقدار افزایش نسبی پاشش در دو فشار 1500 و 2000 بار بود. جهت بررسی نوع گازوییل در میزان تزریق، دو نمونه از گازوییل تولیدی ایران به نام‌های دی 2 و ماهشهر یک درصد، هر دو با عدد ستان49، نقطه ریزش( 3-) و چگالی 820 کیلوگرم بر متر مکعب، ولی ویسکوزیته متفاوت مورد ارزیابی قرار گرفتند. نتایج حاصل در فشارهای معکوس5، 25 و 70 بار با فشارهای تزریق 90 ،200 و 300 بار بدین شرح بود که با افزایش فشار، مقدار تزریق سوزن انژکتورهای با گازوییل نمونه دی 2 به مقدار محسوسی بیشتر است . در فشار ثابت با افزایش فشار معکوس میزان تزریق به دلیل نفوذ کمپرس هوا به درون محفظه پاشش سوزن انژکتور کاهش می‌یابد.

کلیدواژه‌ها

ریل مشترک

فشار ریل

فشار برگشت

روش بوش

انژکتور دیزلی

اندازه گیری شاخص پاشش

موضوعات

سیستم محرکه خودرو

عنوان مقاله English

Evaluation of the amount of injection in the injector needles of the diesel common rail fueling system using the Bosch method

نویسندگان English

mojtaba foroozandehnasab ¹

mohammadkazem khosravani ²

¹ Faculty member, Department of Agricultural Engineering, Technical and Vocational University (TVU), Tehran, Iran,

² Department of Electrical Engineering,Technical and Vocational University (TVU), Tehran,iran

چکیده English

This study aimed to investigate the changes in pressure and the effect of fuel type on the fuel injection quantity in a unit of time on diesel engines equipped with a common rail system and using a Bosch measuring device. In the first stage, single-hole injector nozzles were used at reverse pressures of 60 and 100 bar (the pressure of compressed air entering the combustion chamber into the injector nozzle when the needle opens) and the amount of fuel was measured and recorded at different pressures. The result was extracted as a linear relationship of pressure and injection quantity with fitting lines with a maximum accuracy of 0/98. In the second stage, 8-hole injector needles were used. The pressure and fuel amount graphs were extracted at reverse pressures of 60 and 100 bar, indicating oscillatory analysis of relative increase in spray amount at 1500 and 2000 bar pressures. For investigating diesel type in injection amount, two samples of Iranian-produced diesel named D2 and Mahshahr 1% , both with cetane number 49, pour point (-3°C), density of 820 kg/m³, but different viscosity, were evaluated. The results in reverse pressure 5, 25 and 70 times with the pressure of injection 90, 200 and 300 times described that by increasing pressure, the amount of injection of needles with sample D2 was significantly higher. At constant pressure, with increasing reverse pressure, the amount of injection decreases due to the penetration of the air compressor into the injection chamber of the injector needle.

کلیدواژه‌ها English

Bosch method

Bosch rate measurement

Common rail

Diesel injector

Rail pressure

Reverse pressure

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