What is LEV
What is a Low Emission Vehicle (LEV)?
Hybrid vehicles provide significant greenhouse gas savings during stop-start driving conditions due to such features as:
- the engine switching off as a vehicle comes to rest, rather than leaving the engine idling while stationary
- the use of batteries for storage and discharge of electrical energy for vehicle propulsion
- the use of an electrical motor to either take over from or supplement a conventional internal combustion engine
- regenerative braking that allows the energy that is normally lost as heat when braking to be converted into electrical energy that is stored for later use
Diesel engines have an inherently more efficient operating cycle than spark-ignition (petrol) engines. This results in less fuel energy being consumed to produce the same amount of propulsion energy for the vehicle.
Liquid Petroleum Gas (or LPG) is the most widely used ‘alternative fuel’ in Australia. As with all fuel/technology combinations, the best efficiencies are obtained in vehicles designed and constructed to run only on LPG. Less efficient are dual-fuel vehicles that are able to run on both petrol and LPG, although they can still be marginally more climate-friendly than petrol. Aftermarket conversions to LPG are the least efficient approach, and can generally be inferior to those supplied by the manufacturer.