Commercially available turbocharged CNG

[tomdotstar]

Once again, the rest of the world is leaving the US behind.


http://finance.yahoo.com/news/BorgWa....html?x=0&.v=1

[freedml]

Re: Commercially available turbocharged CNG

Sort of, BorgWarner is an American company.

[ajgiorgi]

Re: Commercially available turbocharged CNG

They need to make one for the GX!

[Curtis]

Re: Commercially available turbocharged CNG

I find it intresting that the VW Passat TSI EcoFuel has a compression ratio of 10:1. Are they using a gasoline engine and boosting the pressure to make it run at higher cylinder pressure to accomodate cng?

The GX runs at 12.5:1 and a (light) turbo boost would give it a bit of a kick for the performance minded, but how high can you go with the compression before you start blowing things like head gaskets?

If the VW started at 12.5:1... would it need the turbo?

[Gerben]

Re: Commercially available turbocharged CNG

I'm not really that technical, but the TSI engine is also available as a gasoline version. This engine on gasoline produces less power than the CNG version. I have no idea how it works. Opel (GM) has a very similar TSI engine.

[ZafiraCNGGermany]

Re: Commercially available turbocharged CNG

All about TSI:

http://www.volkswagen.com/vwcms/master_public/virtualmaster/en2/experience/innovation/technical_glossary/tsi.index.html

[cowboy]

Re: Commercially available turbocharged CNG

I find it intresting that the VW Passat TSI EcoFuel has a compression ratio of 10:1. Are they using a gasoline engine and boosting the pressure to make it run at higher cylinder pressure to accomodate cng?

The GX runs at 12.5:1 and a (light) turbo boost would give it a bit of a kick for the performance minded, but how high can you go with the compression before you start blowing things like head gaskets?

If the VW started at 12.5:1... would it need the turbo?

when running any kind of boost the lower the the compression ratio to start the higher boost can be used and that lets you stuff more air in without poping the head off or bending rods think of a 100 ci motor without any boost the most air you could get in the cylinder would be 100 ci at14.5 psi at sea leavel now boost the intake to29 psi now you have 200ci of air now lets boost it 43.5 and you could stuff 300 ci of air in now just add 3 times the fuel and presto you can make 3 times the horsepower with a motor weighing what a 100 ci motor weighs but if the starting compression ratio is to high bad things will happenie bent rods headgaskets etc now I know that alot of other things come into play here this is just to give a idea that by starting with lower compression you can get more by adding more boost I know of one cummins 400 that was droped to 11.5 or 12to1 and boosted to way over 100 psi for a pulling tractor it took two cans of starting spray to get the heat for it to stay running on diesel and they thought it made about 2500 horsepower with ex temp of 2200 now it could not live long at those temps but a pull lasts just seconds so the the heat could not transfer to the pistons that fast and if I remember right the pistons were plasma coated

[CNGvw]

Re: Commercially available turbocharged CNG

Hello I have been running Turbo VW BI-Fuels cars for over two years.
I have not blown any thing up. I been getting 40 MPG of CNG all day long and drive it every day.

It is the stock 2001 VW Jetta Turbo engine I use. On my site I do post some of what works . The inventions I build for this the CNG FOGGER works well I drive there in Boston MA. witch is been SUB zero many days with no problems on CNG.

CNGBOB