What is an LPG/CNG Spark Plug? What type of spark plug is best for LPG vehicles?
All vehicles that have a gasoline engine use spark plugs. The spark plugs’ task is to ignite the combustion chamber by burning the air-fuel mixture. The fuel consumption and performance directly impact the spark plugs. Good ignition won’t occur if the gap between the spark plug and the spark plug isn’t in the right place. The engine loses its power and weak explosion can occur in the combustion chamber.
The combustion of gas is quite different to that of gasoline. LPG burns at lower revs than gasoline and at higher revs faster than gasoline. LPG vehicles produce slightly less power because of this. These losses are minimized by modern LPG systems. The performance loss is virtually negligible for the user. LPG has a higher combustion heat, which means the cylinders come in direct contact with hot exhaust gases. It is also more difficult to ignite because of the 30% higher combustion resistance of the mixture. This is the greatest problem spark plugs will encounter.
Regular spark plugs are susceptible to wear and damage from high temperatures. To ensure healthy combustion, a higher ignition voltage is needed. This can increase the possibility of malfunctioning ignition coils. This is why iridium-chip fine-tipped sparkplugs are needed. They are able to withstand lower ignition voltages and are specifically adapted for these conditions.
LPG vehicles using LPG should use cold spark plugs that have a pitch lower than 0.8mm. Cold spark plugs don’t cause soot and deposits on the spark plugs like gasoline. These spark plugs are protected against corrosion by a special coating. The best heat conduction is achieved by a copper core in the grounding electrode.
