it is a device which is change the original ignition point,calculated for a correct gasoline running of the carit is a device which is change the original ignition point,calculated for a correct gasoline running of the car,to adapt it to alternative fuels like LPG and CNG.these have a slower combustion time in comparision to gasoline,therefore it is necessary for the spark to ignite in advance in comparision to the original point. 

lpg cng timing advancer processor widely used in cng vehicle