Explain a GDI engine

[Alwaysforward]

Can someone explain to me the differences that are in a GDI engine? What are the pros and cons?

 

[Mark_888]

Do a Google search on gasoline direct injection.

 

[Potty_Pants]

best to search , the info would be far more informative then most posts could convey.

Bottom line though, regular fuel injection is proven over 20 years and reliable.

GDI is the newbie and is not proven yet, concerns over carbon build up, early plug retirement, and high pressure injector failures, etc.

I'd still take GDI over fuel injection... but im a techie and will take the punches as they come.


ppp

 

[homeofstone]

This video explains it. [ame="http://www.youtube.com/watch?v=L2zJWgyVbFA"]http://www.youtube.com/watch?v=L2zJWgyVbFA[/ame]

 

[dg_moore]

This video explains it.

Man, what an annoying announcer!

 

[imaphaetonguy]

The Administration should hire this guy to deliver the ongoing bad Obamacare news.

People may be less upset about doubling of their healthcare costs if delivered by this deep, Anchorman-like authoritative voice.

 

[Alwaysforward]

Thanks for all the reply's. Sounds good but how long has this technology been around. What is the projected longevity?

 

[Potty_Pants]

Thanks for all the reply's. Sounds good but how long has this technology been around. What is the projected longevity?

no idea ... too new.

Injectors shooting at 2000-3000 PSI. two fuel pumps.

better management of air/fuel ratio might translate into a better running/performing car.

my biggest concern isn't longevity its carbon build up. However if the
engine is prone to it, a 300-500 walnut blast will fix it... but how often and
how much is palatable ?

ppp

 

[Crusty Old Shellback]

Actually DI has been around for some time, mostly in desiel engines.

"The first passenger car to be powered by direct injection was the 1986 Fiat Croma 2.0 TD i.d. (Turbo Diesel iniezione diretta pump was developed by Bosch in accordance to the Fiat's engineers specifications)."

A little search found this.

"The invention of direct gasoline injection was by the French inventor of the V8 engine configuration, Leon Levavasseur in 1902.[4] Levavasseur designed the original Antoinette firm's series of V-form aero engines, starting with the Antoinette 8V to be used by the aircraft the Antoinette firm built that Levavasseur also designed, flown from 1906 to the firm's demise in 1910, with the world's first V16 engine, using Levavasseur's direct injection and producing some 100 hp, flying an Antoinette VII monoplane in 1907."

"The first automotive direct injection system used to run on gasoline was developed by Bosch, and was introduced by Goliath and Gutbrod in 1952."

"The 1955 Mercedes-Benz 300SL, the first production sports car to use fuel injection, used direct injection."

So it's been around a loooooong time.

 

[Atlgen]

Been around forever in Diesel engines. Fairly new with gasoline engines, I guess my biggest concerns are injector durability as well as the fuel pumps.

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[PMCErnie]

Thanks for all the reply's. Sounds good but how long has this technology been around. What is the projected longevity?

Buying a new Genesis/Equus? You get a 10 year/100,000 mile powertrain warranty.

 

[RonJ]

From what I gather, one of the concerns is a carbon build-up on the back of the intake valve which never gets "washed" by gasoline with detergent in it.

Where does this carbon come from? Is it coming from oil which is drawn down through the intake valve guide? Maybe a better sealing system is needed. Maybe less pressure difference between the upper and lower ends of the guide.

What if the oil hitting the back of the intake valve is coming from the crankcase ventilation system. A PCV system that dumps crankcase vapours with it's unburnt carbons into the intake manifold could be the source. Perhaps the PCV system requires an air/oil separator. These separators can be purchased from a number of different sources for a range of prices. If you purchase and install a separator on your GDI engine, will Hyundai still honour the engine warranty if it's needed?

Other sources say that synthetic oils are less prone to causing this carbon build-up than dino oil is. Seems it varies from one manufacture to another. Some engines use a split system, some fuel is DI and some is injected into the manifold to wash the intake valve.

It'll be interesting to see how our GDI engines get along with this carbon issue as mileage accumulates!

RonJ

 

[homeofstone]

Buying a new Genesis/Equus? You get a 10 year/100,000 mile powertrain warranty.

For some like me 100k is less than three years driving. I want an engine that is proven to be reliable to 250k or more miles. GDI is at this point still ?????

 

[homeofstone]

Very good video of 5.0 GDI. [ame="http://www.youtube.com/watch?v=JIlEKeRKm6A"]http://www.youtube.com/watch?v=JIlEKeRKm6A[/ame]

 

[RonJ]

A couple of good videos in this thread.

RonJ

 

[veed]

^^ yep. thx homeofstone.

 

[PMCErnie]

I forgot that pre-'12 models are not GDI engines. I have little concern that Hyundai will stand behind their GDI engines, even past the 100,000 mile point.

 

[Potty_Pants]

For some like me 100k is less than three years driving. I want an engine that is proven to be reliable to 250k or more miles. GDI is at this point still ?????

100k for someone like me ... is like 20 years.

InSaNe !!!

 

[dg_moore]

100k for someone like me ... is like 20 years.

InSaNe !!!

^^This. I expect this will be the last car I ever buy. I'll be ready for a walker before I need another car

 

[Aquineas]

The Administration should hire this guy to deliver the ongoing bad Obamacare news.

People may be less upset about doubling of their healthcare costs if delivered by this deep, Anchorman-like authoritative voice.

Absolute b.s.:

http://www.cnbc.com/id/101158964

Most people are paying 6-9 percent increase. In the past 10 years, rates are up 89 percent, so next year's premium increases are well inline within the average of the last 10 years. But oh no, the devil-inspired "Obamacare" is to blame for that, right?

What you should really be concerned with is why, in the current state (you know the one that Fox news and others want you to continue to support), we pay twice what the next closest G7 nation pays for health care cost:

http://www.outsidethebeltway.com/why-does-usa-outspend-g7-on-healthcare/

..and rank 48th in the world in infant mortality rate...
http://www.indexmundi.com/g/r.aspx?v=29

We don't have "The Cadillac" of health-care systems; we have the Chevy Beretta, but we're paying Bentley prices. And this status-quo is okay with you to continue?