It is a gaseous hydrocarbon. It can be liquefied by cooling or
compressing. Principle components of LPG are-Propane, Propene,
Butane, Butene, Mixture of propane and butane. Advantages of LPG
1. It mixes better with air due to complete vaporization. 2. It
does not require fuel pump in fuel supply system. 3. It does not
form gum. 4. There are no carbon deposits. Disadvantages of LPG
1. For storage, heavy pressure cylinders are required. 2.
Vehicles weight increases due to stored cylinders. 3. A special
supply system is required to be used. 4. Its calorific value is
lower than petrol. 5. Power generation is lesser than the power
generation in gasoline engine.