SİLİNDİR DEVRE DIŞI BIRAKMA METODU İLE KIVILCIM-ATEŞLEMELİ BİR MOTOR SİSTEMİNDE YAKIT-VERİMLİ EGZOZ ARITMA YÖNETİMİ

Günümüz karayolu otomotiv motorları genellikle sıkı emisyon yönetmeliklerini karşılamak için egzoz arıtma sistemlerine gereksinim duyarlar. Bu sistemlerin önemli bir dezavantajı, düşük yüklerde düşük egzoz sıcaklıkları (Tgaz 250oC) ki bu da düşük yüklerde verimli egzoz arıtımını sağlamaktadır. Ayrıca, artan ısı transfer oranları ile egzoz arıtım katalizör yatağının ısınması hızlandırılmaktadır. CDA tekniği, azaltılmış hava endüksiyonu yoluyla motor pompalama kaybında önemli bir azalmaya sebep olmakta ve bu nedenle yakıt tasarrufu sağlamaktadır. Bununla birlikte, daha düşük hava endüksiyonu düşük egzoz akış oranına neden olmakta ve bu da bazı yüklerde arıtma sisteminin ısınmasını olumsuz etkilemektedir.

FUEL-SAVING EXHAUST AFTER-TREATMENT MANAGEMENT ON A SPARKIGNITION ENGINE SYSTEM VIA CYLINDER DEACTIVATION METHOD

Current on-road automotive engines generally require exhaust after-treatment systems to meet the stringent emission regulations. One major drawback of those systems is their inefficient performance at low loads due to low exhaust temperatures (Texhaust 250oC) which maintains effective after-treatment at low loads. Also, after-treatment catalyst bed warm-up is improved through increased heat transfer rates. CDA technique causes a significant reduction on engine pumping loss through decreased air induction and hence is highly fuel-efficient. However, lower air induction also causes reduced exhaust flow rate which affects after-treatment warm-up negatively at some loads. ,

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Isı Bilimi ve Tekniği Dergisi-Cover
  • ISSN: 1300-3615
  • Yayın Aralığı: Yılda 2 Sayı
  • Başlangıç: 1977
  • Yayıncı: TÜRK ISI BİLİMİ VE TEKNİĞİ DERNEĞİ
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