LPG substition for diesel engine
LPG substition for diesel engine
(OP)
Hi,
diesel engine runing with LPG seems like a great idea here in australia diesel is much more expensive then petrol and LPG. It makes financial sense to convert from petrol to LPG but not to diesel/lpg because available kits dont seem to uses high levels of LPG substitution, what is the limit? I know when it comes to diesel\Natural gas I have herd of 95% gas 5% diesel. It would be great to see a kit that could combine common rail turbo diesel with 95% subsitition of diesel with LPG, since they are now producing some nice small but powerful diesels.
diesel engine runing with LPG seems like a great idea here in australia diesel is much more expensive then petrol and LPG. It makes financial sense to convert from petrol to LPG but not to diesel/lpg because available kits dont seem to uses high levels of LPG substitution, what is the limit? I know when it comes to diesel\Natural gas I have herd of 95% gas 5% diesel. It would be great to see a kit that could combine common rail turbo diesel with 95% subsitition of diesel with LPG, since they are now producing some nice small but powerful diesels.





RE: LPG substition for diesel engine
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RE: LPG substition for diesel engine
This is not so much of an issue with CNG since methane is more resistant to self-ignition inside the cylinders.
Most "true" CNG conversions of diesel engines (example: city buses) completely eliminate the diesel fuel system, but operate stoichiometric with spark ignition, essentially like a gasoline engine but with a higher compression ratio.
I'm not aware of any full LPG conversions of diesel engines because of the detonation issue; all I've heard of are conversions of spark-ignition gasoline engines, but that doesn't mean it has never happened.
RE: LPG substition for diesel engine
Diesels are are not my area, but I think typically compression ratios are 18 to 20:1. The timing of the fuel injection is critical re nature of combustion process in a somewhat similar vein to spark timing in a spark ignition engine.
LPG is added to the manifold so it is not timed, so it can ignite at the point in the compression stroke where the chamber is seeing somewhere in the ballpark 11 times atmospheric pressure.
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RE: LPG substition for diesel engine
j79 guy