Solenoid tabanli enjektörün mekatroni̇k tasarimi ve anali̇zi̇

Injectors are devices for producing spray, namely, for creating small liquid droplets. In the automotive industry, generally, the injectors are used to inject fuel into the combustion chamber. In recent years, systems are developed to clean the exhaust gases produced by the diesel engines. In these systems, injectors are also used to reduce the NOx emissions, which are harmful to the environment, by spraying urea solution to the exhaust gas. Injectors are compact systems with parts like atomizer, actuator, plunger, spring, needle, and seat. The design process of each component is separate, but they must be designed together. Once assembled, replacing parts of the system can be quite challenging. The aim of this thesis is to design a modular solenoid-actuated injector mechanism so that tests with a variety of subsystem components could be conducted. In this thesis, the working principles of solenoid actuators used in injectors have been studied. An injector mechanism which is modular in all parts has been designed, produced and tested. The components of this modular design can be changed independently, and the efficiency of the updated system can be investigated. This mechanism has shortened the injector development and testing process. The prototype was tested in demanding conditions similar to commercial injectors and successfully opened in 1.2 milliseconds at 80-micrometer displacement under 5 bars liquid pressure.