GASOLINE DIRECT INJECTION

GASOLINE DIRECT INJECTION

ABSTRACT

The Gasoline Direct Injection Engine (GDI) is also known as the Direct Injection Stratified Charge Engine (DISC). Until recently, direct injection technology had been applicable only to the quality governed diesel engines. However, Gasoline Direct Injection utilizes the Direct Injection Technology for Gasoline i.e., Petrol engines.

This technology is so named because the fuel, petrol, is directly sprayed into the combustion chamber after the compression stroke instead of being sprayed through the inlet valve during the inlet stroke.

This paper explains he concept and the working of this technology.

It also explains the advantages of Gasoline Direct Injection over Multi Port Fuel Injection (MPFI). Also explained are the solutions that can be used to optimize the Gasoline Direct Injection engine in order to counter its limitations.

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 multi-point 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.

Download full seminar papers At
http://www.enjineer.com/forum