Lpg

[John 1]

Anyone had a diesel engine converted with LPG, if so costs, where installed and any comments.

[monty]

LPG conversions on diesel engines are not done in Thailand as far as I know...

In Europe they are only done on big trucks etc...

Basically with a diesel-LPG conversion you only replace around 25% of the diesel injected with LPG.

So your engine is running on 75% diesel+25% LPG resulting in only a very small saving.

Reason is the different operation of a diesel engine compared with a gasoline engine.

In a gasoline engine the air/fuel mixture goes into the cilinder, gets compressed and then ignited at the correct time by a spark.

In a diesel engine, only air goes into the cilinder, the air gets compressed and then the diesel is injected at high pressure at the correct time, causing it then to ignite. Hence the much higher compression ration of a diesel engine.

In short LPG/petrol gets ignited by a spark, diesel gets ignited by compression (pressure).

LPG is very similar to gasoline, so only a gasoline engine will work with 100% LPG.

I think in a diesel LPG conversion, a small amount of LPG gets mixed with the air going into the cilinders, so less diesel is required to create the same energy. Ignition is still initiated by the injection of the diesel fuel...

To run a diesel engine on 100% LPG, you would have to convert it to a gasoline engine, meaning a drastic reduction of the compression ratio and installation of an ignition system. Which I don't think is practically possible!

[solent01]

John, I didn't think it was possible to run LPG in a diesel engine, to burn LPG don't you need spark plugs ?

Sol

[John 1]

Monty,

your reply is correct it can be done with diesel it's mixed at a certain ratio it increase the burning of the diesel also and increase power, all I'm looking for is a supplier in Thailand and a cost.