Halit KARABULUT, Erkan ÖZTÜRK, Can ÇINAR

TEK SİLİNDİRLİ DÖRT ZAMANLI BİR DİZEL MOTORUNUN DİNAMİK MODELİ VE TİTREŞİMLERİNİN İNCELENMESİ

Bu çalışmada tek silindirli dört zamanlı bir dizel motorunun dinamik modellemesi yapılarak, motorun hızlanma sürecinde yüklü ve yüksüz koşullarda sergilediği davranışlar, motor bloğunun titreşimleri ve krank milinin açısal hızının değişimleri incelenmiştir. Dinamik model; piston, krank mili, motor bloğu ve biyelin hareket denklemlerinden oluşmaktadır. Bloğun ve diğer dinamik elemanların hareketleri krank eksenine dik bir düzlemde tanımlanmıştır. Motor bloğunun hareketi iki serbestlik derecesine sahiptir ve bunlardan birisi silindir ekseni doğrultusundaki öteleme hareketi, diğeri ise krank ekseni etrafındaki dönme hareketidir. Sunulan çalışmada sayısal analiz işlemleri, başlangıç koşulları altında zaman değişkenine göre yapılmıştır. Simülasyonda kullanılan gaz basıncı değişimi tek silindirli dört zamanlı bir dizel motorundan deneysel yöntemle elde edilmiştir. Farklı sertlik ve sönümleme sabitleri için bağlantı takozlarında oluşan kuvvetler ve motor parçalarının titreşim karakteristikleri grafik olarak sunulmuştur.

Anahtar Kelimeler:

Motor dinamiği, krank mili açısal hız dalgalanmaları, blok titreşimleri

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