تحقیقات موتور

تحقیقات موتور

بررسی عددی اثر هندسة قطعه بر روی فشار ناشی از آب‌بندی افشانه‏‌ها بر رفتار مکانیکی قطعه لولة سوخت ‏خودروی شاهین در شرایط دمای کارکرد موتور

نوع مقاله : مقاله پژوهشی

نویسندگان
گروه مهندسی و ‏R&D‏، شرکت مژده وصل شیراز، قزوین، ایران
چکیده
لولة سوخت یکی از اجزای کلیدی در کارکرد و عملکرد موتورهای احتراق داخلی است که به‌عنوان قطعه پخش‌کنندة سوخت و احتراق موتور از حساسیت بالایی برخوردار است. این مقاله به بررسی دوام و پایداری لولة سوخت شاهین در شرایط دمای کارکرد موتور می‌پردازد و رفتار مکانیکی قطعه را موردبررسی و تجزیه‌وتحلیل قرار می‌دهد. تحلیل حالات تغییر شکل و توزیع تنش قطعه لولة سوخت در دو نوع طراحی تقویت‌شده (سه‌پایه) و نوع ساده (دوپایه) با استفاده از شبیه‌سازی سه‌بعدی و شبیه‌سازی اجزای محدود در شرایط دمای کارکرد موتور بررسی می‏‌شود. نتایج شبیه‌سازی برای اعتبارسنجی با مقادیر تجربی مقایسه گردید و مقادیر قابل قبولی را ارائه کرد. توزیع تنش و تغییر شکل لولة سوخت در دو نوع طراحی تقویت‌شده و ساده در دمای کارکرد موتور باهم مقایسه و بیشینه مقادیر تنش و تغییر شکل در محل قرارگیری افشانه‏‌ها موردبررسی واقع شد. بیشترین مقدار تغییر شکل در محل افشانه‏‌های لولة سوخت شاهین نوع ساده (دوپایه) در دمای 140 درجة سانتی‌گراد با مقدار 0.59 میلی‌متر است. لولة سوخت با طراحی تقویت‌شده (سه‌پایه) به‌طور قابل‌توجهی تغییر شکل قطعه بویژه در نقاط نشیمنگاه‏‌های افشانه‏ در دمای کارکرد موتور کاهش می‌دهد. همچنین، لولة سوخت طراحی تقویت‌شده از تمرکز تنش‌های موجود بر پایه‌های جانبی لولة سوخت می‌کاهد و قابلیت اطمینان قطعه را افزایش می‌دهد.
کلیدواژه‌ها

عنوان مقاله English

Numerical study on the effect of geometry on pressure caused by the injectors sealing on the mechanical behavior of common rail fuel of Shahin car at the engine operating temperature conditions

نویسندگان English

Reza Sedighi
Alireza Bakhshinejad Bahambari
Engineering and R&D Department, Mojdeh Vasl Shiraz Company, Qazvin, Iran
چکیده English

The common rail fuel is one of the key components in the operation and performance of internal combustion engines, which is crucial as a fuel distributor and engine ignition part. This article provides an investigation regarding the durability and stability of common rail fuel of Shahin car at the engine's operating temperature and analyses the mechanical behavior of the part. In this research, the analysis of deformation states and stress distribution of Shahin fuel rail part in two types of reinforced design (three legs) and simple type (two legs) is investigated using 3D modeling and finite element simulation at the engine's operating temperature conditions. The simulation results were compared with the experimental amounts for validation and verification and presented acceptable amounts. The distribution of stress and deflection of Shahin fuel rail in two types of reinforced and simple designs were compared at the engine's operating temperature conditions, and also, the maximum amounts of stress and deflection were investigated at the location of the injectors. The maximum amount of deviation was observed at the location of simple Shahin fuel rail injectors (two legs) at a temperature of 140°C with an amount of 0.59mm, which is one of the potential points for fuel leakage. Shahin fuel rail with a reinforced design (three legs) significantly reduces the deformation of the part, especially at the points of the injector nipples at engine operating temperature. Moreover, the reinforced design of the Shahin fuel rail reduces the stress concentration on the fuel rail's lateral legs and increases the reliability of the part.

کلیدواژه‌ها English

Common Rail Fuel
Internal Combustion Engine
Injector
Finite Element Simulation
Tension
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  • تاریخ دریافت 15 فروردین 1403
  • تاریخ بازنگری 19 تیر 1403
  • تاریخ پذیرش 30 مرداد 1403