TAILIEUCHUNG - Mechanical Enggineering  Seminar Topic

Ga asoline dire injection (GDI) eng ect n gine technol logy has rec ceived co onsiderable attention o over the las few yea as a w st ars way to sig gnificantly i improve fuel efficiency without mak l king a majo shift or aw from co way onventional i internal com mbustion tech hnology. In many respects, GDI technology represents a further step in the natural I y n ev volution of gasoline en ngine fueling systems. E g Each step of this o ev volution, fro mechanic om cally based carburetion to throttle body n, e fu injection. | Mechanical Enggineering Seminar Topic GDI GASOLINE DIRECT INJECTION INTRODUCTION Gasoline direct injection GDI engine technology has received considerable attention over the last few years as a way to significantly improve fuel efficiency without making a major shift away from conventional internal combustion technology. In many respects GDI technology represents a further step in the natural evolution of gasoline engine fueling systems. Each step of this evolution from mechanically based carburetion to throttle body fuel injection through multi-point and finally sequential multipoint fuel injection has taken advantage of improvements in fuel injector and electronic control technology to achieve incremental gains in the control of internal combustion engines. Further advancements in these technologies as well as continuing evolutionary advancements in combustion chamber and intake valve design and combustion chamber flow dynamics have permitted the production of GDI engines for automotive applications. Mitsubishi Toyota and Nissan all market four- stroke GDI engines in Japan. Major Objectives of the GDI engine Ultra-low fuel consumption that betters that of even diesel engines Superior power to conventional MPI engines Sophisticated high-pressure injectors capable of producing very fine well-defined fuel sprays coupled with advanced charge air control techniques now make stable GDI combustion feasible. There are impediments to widespread GDI introduction however especially in compliance with stringent emission standards. This report addresses 2 Mechanical Engg Seminar GDI both the efficiencies inherent in GDI technology and the emissions constraints that must be addressed before GDI can displace current spark-ignition engine technology. In this seminar I am intending to familiarize the working of this technology which has the capability to become the turning point in the development of diesel engine technology.

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