Whilst nosing on another forum i came across this as a consideration for another car.

but it sounds good if the s200 could use this system.

http://www.lpgli.com/features.html


or other gas guzzling cars.

 

Wow, if only it was as good as that.

I have no idea why it wouldn't be, but something that gives you 10% more and costs 50% less surely can't be real?

 

There are major tax incentives for using LPG.

Watch them evaporate faster then the fuel as demand increases.

 

Of course.

Suddenly it'll be 'found' that a chemical used in LPG is super pollutive and that with every mile driven, 17 Penguins actually die as a direct result...

 

Indeed.

Honda had a joint venture in US with a device called 'Phill' which allowed you to compress your own natural gas for your Civic in the comfort of your own garage. So bollocks to the lack of a network.

It's still never really caught on though - US gas is still was too cheap.

 

that would upset a lot of people in pembroke where they just opened that huge lpg storage thingamy jig.


i like the sound of this lpg injection.it seems to have originated in italy and is popular down under.

 

H2 DI works very well on Wankels.

Same ol' storage and infrastructure problems and no-one wants to invest if they don't need to.

 

LPG *can* give 10-15% more power,but....
this is merely because LPG has a higher specific energy ie octane rating of approx 109RON.

LPG also burns more completely than petrol

HOWEVER

LPG burns slower, so you need to change your ignition timing to maintain efficiency. Even then, because the explosion in the cylinder is slower, you need to design the engine to suit in order to reap maximum benefits.

All in all, by using LPG sequential injection on a petrol engine, the best that you can realistically hope for is the same power output as with petrol IME. i would be sceptical of any gain claims without further work.

Oh, and you will also have an extra 80+kgs of weight in the car too!

A non-starter for the S2000, but perfect for 4x4s.

I have an induction system on my V8 carb fed landy and get marginally better mpg on lpg, as my system is closed loop via a lambda probe. power is noticeably down on lpg, so it's petrol for offroading and/or any overtaking but lpg for cruising.

 

this system seems to be able to get rid of the petrol tank alltogether.

and if you want to use petrol you convert the filler thing back to a petrol one.ie uses the same tank.

all the lagging needed to keep the lpg at a very low temp might be a hassle.

 

erm... cool idea if you can make it work!

At room temperature and pressure, LPG is a gas. By compressing it and storing it in a tank, you have liquid lpg in the bottom of the tank, with gaseous lpg floating above it.

The feed from the tank is from the liquid phase and then goes either to a vaporiser and hence into a mixer unit, or through a filter straight to your injection pump and then to the injectors.

The contents of the tank remain under a constant pressure throughout and as you deplete the liquid phase, moreliquid gas evaporates to maintain the equilibrium between liquid and vapour.

As such, your petrol tank is not suitable for two reasons: Firstly it is not sealed; and secondly it is not designed to withstand the pressure of stored LPG.

I have retro-fitted a cylindrical tank to my land rover, but you can use toroidal tanks, which live in the spare wheel well.

If you could whip out a non-integral tank and substitute a smaller LPG tank, then you would be able to maintain the weight. You should be able to fit an LPG filler under the filler flap, but it might be a bit of an epic.