aminadab

Can anyone recommend a good article or two on the engine. Of interest are ones that are able to dumb down some of the specs, especially the siginificance of FSI and the like. I've never had a reason to know what was going on in my car before now. Also, does anyone know a good book on basic engine/car functioning? Something that can (say) make meaningful 200hp @ 5100 rpms? Thank you,
Ben

April

<img src="http://www.boschautoparts.co.uk/images/product/pcPetr/pcPetr8.jpg">

<img src="http://images.google.com/url?q=http://www.audi.com.au/glossary/images/fsi/m024_c.jpg">

Here's some basic info on how fuel injection works. What makes the FSI system special is that it operates under extremely high pressures, and fuel is injected directly into the cylinder instead of the intake port. This allows a finer spray of fuel and more precise metering. This site is rather click intensive, but it takes you through the basics.

http://auto.howstuffworks.com/fuel-injection.htm

A little more detailed info about Audi's system:

http://www.boschautoparts.co.uk/pcPetr8.asp?c=2&amp;d=1

We get a slightly dumbed down version of FSI, since North American fuel quality is not as high in some places as it is in Europe. As the EPA slowly changes fuel quality standards, we'll see increased efficiency and perhaps a little more power. What is unique to VAG (Volkswagen Audo Group), is the combination of FSI and turbocharging.

https://www.audiworld.com/news/03/080403/content.shtml

Audi's info:

http://www.audi.co.nz/index.asp?artid=-1332945606

An excellent primer on any and all technical features in cars (Audi uses a similar but not identical injection system to Renault's):

www.autozine.org/technical_school/tech_index.htm

Here's a somewhat more technical link, but worth checking out as it will make sense as you learn.

http://forums.vwvortex.com/zerothread?id=1422108


Hopefully this is what you were looking for.<ul><li><a href="http://www.sae.org/automag/techbriefs/07-2004/1-112-7-52.pdf">rather technical pdf</a></li></ul>

markmark206

way cool, april, how do you know all this!?

also,

"We get a slightly dumbed down version of FSI, since North American fuel quality is not as high in some places as it is in Europe."

so some areas (gas stations/chains?) have better (higher MPG and hp for 2.0TFSI) gas than others, yes?

got ratings?

thanks, mark.

afretes

<ul><li><a href="http://web.videorelay.com/1180/bosch/GasolineSystems_Bde_gb.mpg">http://web.videorelay.com/1180/bosch/GasolineSystems_Bde_gb.mpg</a</li></ul>

April

because fuel sulphur levels are too high in some brands/regions. Lower levels have been mandated, but some won't be in effect until '07 and others not until '09. Not sure if those EPA levels are low enough even then. Lower sulphur means lower emissions. For the lean burn aspect to be fully effective, the car has a special catalytic converter - although I don't know that we get it here since our cars don't have that aspect.<ul><li><a href="http://www.caranddriver.com/article.asp?section_id=27&amp;article_id=8130">coo l article on the background</a></li></ul>

aminadab

Wow, this is fantastic. Thanks very much,
Ben

markmark206

sweet, thanks for the info!

aminadab

From that Bosch article: "During stratified-charge operation, the injectors meter the fuel mass so precisely that "unthrottled" operation is possible. Here, the throttle butterfly actually stays wide open, reducing the cylinder pumping effect (exhaust and refill) and lowering fuel consumption"

I've noticed this when teaching my girlfriend how to drive stick: I was attempting to produced that jumpy point that happens when in gear with no presure on the accel. Does this mean that it's ok to leave the car in first at a light while just breaking? I tried this and the car didn't stall. Or, is this abusing the engine? Very cool either way.

April

slowly and have them creep without touching the gas pedal. I'll confirm this on my car just to be sure.

In fact my favourite car for teaching people to drive stick is a 2.0 Jetta/Golf. Lots of torque down low means that if you have a nice level parking lot, you can have them practice letting out the clutch without ever touching the gas.

BrandonLive

It's how you check to make sure your clutch is good. Just let it out reeeeaaal slow like, and don't be on a hill. Apparently it's a pretty common test for the trannies in VAG cars.