Hybrid Vehicle

One of the recent technological advancement is Hybrid Vehicle
A hybrid vehicle has three major systems
1. A primary power source, either an IC engine driven generator where the IC engine only operates in the most Fil's Auto Corner: Gasoline efficient part of it's performance map, or alternatives such as fuel cells and turbines.
2. A power storage unit, which can be a flywheel, battery, or ultracapacitor.
3. A drive unit, almost always now an electric motor that can used as a generator during braking.
Regenerative braking may increase the operational range about 8-13%.
Hybrid vehicles may enable this problem to be at least partially overcome, but they remain expensive, and the current ZEV proposals exclude fuel cells and hybrids systems, but this is being re-evaluated.
The advantage in using this hybrid vehicle is that the environment pollution decrease which is because of the decrease in the burning of fuel which in turn due to the usage of alternate source(Battery , solar etc). The shifting from one source of energy to another depends on the efficiency obtained by that source and this goes with the maximum efficiency. Thus the overall efficiency increases.