A hybrid vehicle uses two or more distinct types of power, such as internal combustion engine+electric motor, e.g. in diesel-electric trains using diesel engines and electricity from overhead lines, and submarines that use diesels when surfaced and batteries when submerged. Other means to store energy include pressurized fluid, in hydraulic hybrids.Mopeds, electric bicycles, and even electric kick scooters are a simple form of a hybrid, powered by an internal combustion engine orelectric motor and the rider's muscles. Early prototype motorcycles in the late 19th century used the same principle.
- In a parallel hybrid bicycle human and motor torques are mechanically coupled at the pedal or one of the wheels, e.g. using a hub motor, a roller pressing onto a tire, or a connection to a wheel using a transmission element. Most motorized bicycles, mopeds are of this type.
- In a series hybrid bicycle (SHB) (a kind of chainless bicycle) the user pedals a generator, charging a battery or feeding the motor, which delivers all of the torque required. They are commercially available, being simple in theory and manufacturing.
The new Auto rail à Grande capacité (AGC or high-capacity railcar) built by the Canadian company Bombardier for service in France is diesel/electric motors, using 1500 or 25000 V on different rail systems. It was tested in Rotterdam, the Netherlands with Rail feeding, a Genesse and Wyoming company.
The First Hybrid Evaluating locomotive was designed by rail research center MATRAI in 1999 and built in 2000. It was a G12 locomotive upgraded with batteries, a 200KW diesel generator and 4 AC motors.
Japan's first hybrid train with significant energy storage is the KiHa E200, with roof-mounted lithium ion batteries.