Gasoline Direct Injection Engines - A Bibliographical Review

Carlos Queiroz; Eduardo Tomanik

doi:10.4271/973113

1997-12-31

Gasoline Direct Injection Engines - A Bibliographical Review 973113

Recently, Gasoline Direct Injection (GDI) engine has reached mass production. Fuel economy up to 35% is claimed, at urban driving conditions, by using stratified charge combustion. It also reduces HC emissions at cold start. Most of the car manufactures are researching GDI or even intend to produce it in the near future. If the promised goals are actually achieved, a great change in the development focus for automotive engines will occur.

In GDI engines, ultra lean burn, stratified charge combustion is achieved by injecting fuel directly into the chamber during compression stroke (“late Injection”). In contrast, at higher power conditions, the GDI operates in homogeneous charge and fuel is injected during intake stroke (“early injection”).

This paper intends to summarize some information about Gasoline Direct Injection engines and possible effects on Piston rings. First, some basic concepts about combustion, judged to be necessary to understand GDI engines, are introduced. Some GDI engines are discussed, specially the Mitsubishi and Toyota ones, as well the main differences between conventional and GDI engines.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Digital $37.00 Print $37.00

Preview Document

We also recommend:

Standards

SAE Mobilus®

Publications

News

Events

Professional Development

A World in Motion (PreK-12)

Participate with SAE

SAE Membership

Donate

Gasoline Direct Injection Engines - A Bibliographical Review 973113

SAE MOBILUS