Osman Akın KUTLAR, Ömer CİHAN, Majid JAVADZADEHKALKHORAN

Bir Wankel Motorda Ateşleme ve Püskürtme Üniteleri İçin Elektronik Kontrol Ünitesinin Geliştirilmesi

Bu çalışmada, tek rotorlu bir Wankel motoru için elektronik kontrol ünitesi tasarlanmış ve geliştirilmiştir. Kod Arduino veri tabanında yazılmıştır. Tek rotorlu test motorunun bilgisayar kontrolü ile Visual Studio'da bir ara yüz tasarlanmıştır. Kontrol ünitesi sayesinde püskürtme avansı, püskürtme süresi, motor hızı, bobinin dolma süresi ve ateşleme avansı kontrol edilmiştir. Donanım bölümünde, ilk önce anahtarlama için katı hal rölesi kullanılmış ve daha sonra bir mosfet devresi ile test edilmiştir. Her iki anahtarlamada osiloskoptan alınan ateşleme ve püskürtme sinyallerinin düzenli ve sürekli olarak farklı hızlarda (600, 1000 ve 3000 rpm) geldiği gözlenmiştir. Daha sonra, osiloskop ve yüksek hızlı kamera ile elde edilen sonuçlara göre, katı hal rölesi ile enjektörün açılmasında herhangi bir gecikme olmamıştır. Ancak, enjektörün kapanması 0.6 milisaniye geciktiği gözlemlenmiştir. Bu durum, motorun özellikle yüksek hızlarda düzensiz ve dengesiz çalışmasına neden olmuştur. Mosfet ile kurulan devrede, enjektörün açılıp kapanmasında herhangi bir gecikme olmamıştır. Sonuç olarak, kontrol ünitesinde mosfet ile tasarlanan devrenin kullanılmasının daha uygun olacağı sonucuna varılmıştır.

Anahtar Kelimeler:

Arduino Mikro Denetleyici, Elektronik Kontrol Ünitesi, Ateşleme, Püskürtme, Mosfet, Katı Hal Rölesi, Wankel Motor

Improvement of the Electronic Control Unit for Ignition and Injection in a Wankel Engine

In this study, an electronic control unit was designed and developed for a single rotor Wankel engine. The code was written the Arduino IDE. An interface is designed in Visual Studio for computer control of a single rotor test engine. Thanks to the control unit, the injection advance, injection duration, engine speed, dwell time and ignition advance were controlled. In the hardware part, firstly solid state relay was used for switching, and then a MOSFET circuit was tested. It was observed that the ignition and spraying signals received from the oscilloscope for both switching came regularly and continuously at different speeds (600, 1000 and 3000 rpm). Afterwards, according to the results obtained with the oscilloscope and high speed camera, there was no delay in opening time of the injector with the solid state relay. However, there was 0.6 milliseconds delay in closing time of it. This situation caused the engine to run erratically and unstable at high speeds. In the circuit established with Mosfet, there was no delay at the opening and closing times of the injector. As a result, it was concluded that it would be more appropriate to use the circuit designed with MOSFET in the control unit.

Keywords:

Arduino Microcontroller, Electronic Control Unit, Ignition, Injection, Mosfet, Solid State Relay, Wankel Engine,

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