||Hybrid vehicles combine an internal combustion engine with an electric motor, producing significantly lower emissions and increased fuel economy.
|Hybrid electric vehicle models
||Hybrid electric vehicles (HEV) use two or more energy conversion technologies. This is usually a combination of a conventional engine with extra batteries driving electric motors.
|Hybrid vehicle systems
||There are three hybrid vehicle systems which combine an internal combustion engine with an electric motor. They are: series; parallel; and series-parallel.
|Series-parallel hybrid systems
||The series-parallel hybrid system uses an electric motor to drive the vehicle at low loads and speeds and a gasoline engine when loads and speeds increase. A control unit determines the best balance of power to achieve the most efficient vehicle operation.
|Hybrid system components
||A permanent magnet brushless motor/generator is mounted adjacent to the engine. A smaller motor/generator replaces the engine flywheel. The motor control unit controls the delivery of electric current to and from the battery and the electric motors.
|Hybrid vehicle driving
||When the vehicle is moving off from a stationary position, and when travelling at low to moderate speeds, the main electric motor drives the vehicle. During normal driving, the combustion engine starts and drives the generator & the power divider.|