Abstract:

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.

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