rwb wrote:LPG for diesel? Not heard of that.
Many reasons for that!
I think the main reason is years ago LPG systems for diesel were very basic. They simply dribbled gas in off idle. This offered poor control and resulted in an over stressed engine, overheating, detonation and eventually melted pistons. Many fleet companies got stung with this king of setup so the reputation still lingers.
The other reason is cost. It's more expensive than a standard conversion and can take 4x longer to pay back! How many people actually do the sort of mileage that you need to do in order to pay it back in a car old enough not to worry about warrentys?
In Australia converting diesels is quite a big industry but out there the government gives massive grants for people wanted to convert their cars. Many petrol cars out there are available with LPG from the a factory too!
LPG offers many benefits as well as reduced running costs.
A traditional diesel only burns 70-80% of the diesel injected. Add a little LPG (10-20% of the diesel injected) and that figure rises to 100% burn rate! But you have LPG in the cylinder, so not only are you getting more bang from the diesel (which means you need less of it) but you need even less of it because you have LPG giving you power also!
Because the diesel is burning fully and cleanly you reduce NOx emmisions by 50% and particulates are reduced considerably.
The LPG does burn hotter which means faster warm up time. Faster the engine warms up the more efficient it is!
The oil should stay cleaner for longer because there will be less soot left over from the combustion process.
EGR's, Turbo vanes and DPFs should be more resistant to getting sooted up.
You should get an increase in throttle response and torque. This can be slight or fairly large depending in the type of system you have fitted.
And you get a £5 per year discount on your road tax.
