[grungerock]

1. I have seen buses and cars that is powered by LNG/LPG, but not big trucks. Is it because trucks need to be powered by diesel which generates more energy? So if we run out of conventional oil, that means all truck is dead?
2. Can anyone provide a weblink where it tells how a full LPG/LNG car works? I heard some cars need to fire up with gasoline first before switching to LPG/LNG.

[marek]

You mean LPG (liquid propane gas). LNG (liquefied natural gas) is just super-cooled methane that is liquefied for transportation. Diesel engines produce more torque so are better at hauling goods.

[Jack]

Take a look at http://www.eere.energy.gov/afdc/infrast ... urces.html

as a starting point....

[grungerock]

Should be LNG in this case..on my question

[marek]

No, vehicles are powered by either CNG (compressed natural gas) or LPG. LNG is super-cooled NG that is loaded onto tankers.

[MarkR]

I think the issue is infrastructure of supply.

Buses don't go very far from their bus station and return there at the end of the day. An LPG or CNG pump at the bus station can easily supply the whole fleet.

Cars can be LPG powered too, but they really need to be dual fuel (LPG or petrol) incase you can't find LPG.

Heavy trucks are mainly used for long-distance transportation often on a variety of different routes. You would not be able to keep the fuel filled reliably.

There are technical problems with converting Diesel engines to dual fuel - so the LPG engines used on buses are basically petrol engines converted to run on LPG - rather than modified diesel engines. Now can you imagine running a heavy truck on petrol...

[SoothSayer]

LPG = Liquified PETROLEUM gas

It covers both propane & butane.