A Vehicle uses two or more two or more distinct power sources to move the vehicle. The term most commonly refers to hybrid electric vehicles (HEVs), which combine an internal combustion engine and one or more electric motors.
Two wheeled and cycle type Parallel Hybrid Bicycle Series Hybrid Bicycle Heavy Vehicle Rail Transport Road Transport(Commercial Vehicles) Military Off-Road Vehicles Aircraft
Hybrid electric-petroleum vehicle Parallel Hybrid Mild Parallel Hybrid Power Split or Series Parallel Hybrid Series Hybrid Continuously outboard recharged electric vehicle (COREV) Hybrid fuel (dual mode) Fluid power hybrid Electric-human power hybrid vehicle Plug-in Hybrid Electric Vehicle Fuel cell, electric Hybrid
Current HEVs reduce petroleum consumption under certain circumstances, compared to otherwise similar conventional vehicles, primarily by using three mechanisms Reducing wasted energy during idle/low output, generally by turning the ICE off Recapturing waste energy (i.e. regenerative braking) Reducing the size and power of the ICE, and hence inefficiencies from under-utilization, by using the added power from the electric motor to compensate for the loss in peak power output from the smaller ICE.