Dissertation Defense - Muhammad Sarmad Qureshi

Muhammad Sarmad Qureshi – Ph.D. Electrical and Electronics Engineering

Asst. Prof.  Özkan Bebek – Advisor

Date: 28.12.2022

Time: 10.00

Location: AB4 B127

Control of Solenoid-Based Injectors with different Nozzle Types To Achieve

Soft – Landing And Mass Flow Rate

Asst. Prof.  Özkan Bebek, Özyeğin University

Asst. Prof. Evşen Yanmaz Adam, Özyeğin University

Asst. Prof. Regaip Barkan Uğurlu, Özyeğin University

Assoc. Prof. Kemalettin Erbatur, Sabanci University

Assoc. Prof. Koray Kadir Şafak, Yeditepe University

Abstract:

Electromagnetic (EM) solenoid actuator has recently gained attention in research because of their cost-effectiveness, compact size, and low heat dissipation. Due to these advantages, these devices are used in a variety of applications including injector systems in automobiles. However, a major drawback of using such devices is their unfavorable design to attach any physical sensor, which gives rise to their uncontrollable nature. Due to the discrete actuation properties, the solenoid actuator generates unwanted noise at the time of closing, mechanical wear, and tear, and lack of control over the actuator reduces its practical adaptability. The main focus of this dissertation is the development of open-loop control approaches to achieve low seating velocities, referred to as soft-landing, and to regulate mass flow rates using solenoid-based injectors.

Prior to further research, different control algorithms were evaluated for tracking performance, and the better-performing control algorithm was selected.  A novel open-loop control methodology to achieve lower seating velocities (soft-landing) for solenoid-based injector systems has been proposed, to reduce impact noise and mechanical deterioration. Moreover, a quantification of the attributes to achieve soft-landing has been investigated, for the generic application of the control law on any solenoid-based injector, without any sensory feedback.

In addition, the mass flow rate control for the solenoid-based injector in the open-loop environment that is, without the use of any physical sensor feedback is investigated. A novel robust control approach for tracking mass flow rate reference profiles using a solenoid-based injector has been presented. The proposed control approach successfully tracked the desired mass flow rate reference profiles, to be used in various automotive and chemical injection applications.

Bio:

Muhammad Sarmad Qureshi received his MS degree from the electrical engineering department of the National University of Sciences and Technology, Pakistan. He started working as a Ph.D. student under the supervision of Dr. Ozkan Bebek in 2017 at the department of electrical and electronics engineering at Ozyegin University. He is currently conducting studies on the control of solenoid-based injectors with different nozzle types to achieve soft-landing and desired mass flow rates. His research interests include the sensorless control of electromagnetic injectors used in the automobile sector.