Udemy – Automotive Engineering-Gasoline direct injection Overview

Gasoline direct injection Fundamentals & Characteristics
What you’ll learn
Gasoline Direct injection(GDI) Fundamentals
Requirements
No
Description
Introduction
In the recent years, heavy emphasis on reducing the BSFC while meeting the stringent emission norms
Over the past two decades, attempts have been made to develop an internal combustion engine for automotive applications that combines the best features of the SI and the diesel engines.
The objective has been to combine the specific power of the gasoline engine with the efficiency of the diesel engine at part load.
Research has indicated that a promising candidate for achieving this goal is a direct-injection, four-stroke, sparkignition engine that does not throttle the inlet mixture to control the load.
In this engine, a fuel spray plume is injected directly into the cylinder, generating a fuel-air mixture with an ignitable composition at the spark gap at the time of ignition.
This class of engine is designated as a direct-injection, stratified-charge (DISC) engine
Potential benefits of GDI over PFI
Fuel System requirements
Fuel injector characteristics
Fuel spray characteristics
The fuel injection system in a GDI engine is a key component that must be carefully matched with the specific in cylinder flow field to provide the desired mixture cloud over the entire operating range of the engine
A well-atomized fuel spray must be produced for all operating conditions
A GDI fuel system needs to provide for at least two, and possibly three or more distinct operating modes.
Flow structure
Fuel air mixing
Combustion chamber geometry
Engine operating modes and fuel injection strategies
Types of combustion chambers
Who this course is for:AUtomobile engineering students ,Automotive engineering enthusiasts

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