A Hybrid Vehicle is uses two or more power sources to move the vehicles. The term is called Hybrid electric vehicles. Hybrid vehicles are combine an internal combustion engine and one or more electric motors. Hybrid power trains use diesel electric or turbo-electric to power railway locomotives, buses, heavy good vehicles, mobile hydraulic machinery, and ships. Generally diesel engine drives an electric generator or hydraulic pump which powers one or more electric hydraulic motors.
Hybrid systems are being use for heavy trucks and other highway vehicles with few operational trucks, and buses. The hybrid car industry are already filtering into truck use as Toyota, Ford, GM and others introduced hybrid pickups and SUVs. Recently Kenworth Truck Company introduced a hybrid electric truck called Kenworth T270 Class 6.
Since 1985, US Military has been testing serial hybrid Humvees with faster acceleration, stealth mode with low thermal signature and greater fuel economy. A petroleum-electric hybrid uses internal combustion engines and electric batteries to power the vehicle.
In 1899, Henri Pieper has developed the first petro-electric hybrid automobile in the world. The plug-in-electric vehicle is becoming more common. The batteries can be plugged into house electricity for charging, as well being charged while the engine is running.
A Series hybrid vehicle is driven by the electric motor with no mechanical connection to engine. In 1997, Toyota has released the first series-hybrid bus sold in Japan. GM introduced Chevy Volt series plug-in hybrid in 2010. The Supercapacitors were combined with a lithium ion battery bank have been used by AFS Trinity. It claims to 150 mpg in a series hybrid arrangement.
Another sub-type of hybrid vehicles uses the plug-in hybrid electrical vehicle (PHEV). It is a general fuel-electric hybrid vehicle with increased energy storage capacity.
A 2009 National Highway Traffic Safety Administration report examined hybrid electric vehicle accidents that involved pedestrians and cyclists and compared them to accidents involving internal combustion engine vehicles (ICEV).
Hybrid Vehicles in the market with such safety devices include the Nissan Leaf, Chevrolet Volt, Fisker Karma, Honda FCX Clarity, Nissan Fuga Hybrid, Hyundai Sonata Hybrid, 2012 Honda Fit EV, 2012 Toyota Camry Hybrid, 2012 Lexus CT200h.