03-02-2017, 10:19 AM
An electric hybrid vehicle (HEV) is a type of hybrid vehicle and that combines a conventional internal combustion engine (ICE) propulsion system with this system (drive-train hybrid vehicle). The presence of the electric power-train is intended to achieve better fuel economy than a conventional vehicle or better performance. There are variety of types of HEV, and the degree to which each one functions as an electric vehicle (EV) also varies. The most common form of HEV is hybrid electric car, although hybrid electric trucks (pickups and tractors) and buses also exist.
Hybrid electric vehicles (HEVs) are powered by an internal combustion engine or other propulsion source that can run on conventional or alternative fuel and an electric motor that uses energy stored in a battery. HEV combines the benefits of high fuel economy and low emissions with the power and reach of conventional vehicles. A wide variety of hybrid electric vehicles are currently available. Although HEVs are often more expensive than similar conventional vehicles, some costs can be recovered through fuel savings or state incentives.
Help of an electric motor
Hybrid electric vehicles are powered by an internal combustion engine and an electric motor, which uses for energy stored in the batteries. The additional power provided by the electric motor allows a smaller motor. In addition, the battery can power auxiliary loads such as sound systems , headlights and reduce engine idling when stopped. These features result in better fuel economy without sacrificing performance.
Regenerative braking
A hybrid electric vehicle can not connect to external sources of electricity to charge the battery. Instead, the vehicle uses regenerative braking and internal combustion engine to charge. The vehicle captures energy normally lost during braking using the electric motor as a generator and storing energy captured in the battery. Battery power provides extra power during acceleration.
Efficient fuel system design
HEVs can be either soft or complete hybrids, and full hybrids can be designed in series or parallel configurations.
1.Smooth hybrids, also called micro-hybrids, use a battery and an electric motor to help power the vehicle and may allow the engine to shut down when the vehicle stops (such as at traffic lights or stop-and-go traffic) Further improving the fuel economy. Soft hybrid systems can not power the vehicle using only electricity. These vehicles generally cost less than full hybrids, but provide less substantial fuel economy benefits than full hybrids.
2.Full hybrids have more powerful electric motors and larger batteries, which can drive the vehicle only with electric power for short distances and at low speeds. These systems cost more than mild hybrids but provide better fuel economy benefits.
There are different ways of combining the power of the electric motor and the motor. Parallel hybrids - the most common HEV design - connect the engine and electric motor to the wheels by mechanical coupling. Both the electric motor and the internal combustion engine power the wheels directly. Series hybrids, only use the electric motor to drive the wheels, are sometimes found in plug-in hybrid electric vehicles.
Hybrid electric vehicles (HEVs) are powered by an internal combustion engine or other propulsion source that can run on conventional or alternative fuel and an electric motor that uses energy stored in a battery. HEV combines the benefits of high fuel economy and low emissions with the power and reach of conventional vehicles. A wide variety of hybrid electric vehicles are currently available. Although HEVs are often more expensive than similar conventional vehicles, some costs can be recovered through fuel savings or state incentives.
Help of an electric motor
Hybrid electric vehicles are powered by an internal combustion engine and an electric motor, which uses for energy stored in the batteries. The additional power provided by the electric motor allows a smaller motor. In addition, the battery can power auxiliary loads such as sound systems , headlights and reduce engine idling when stopped. These features result in better fuel economy without sacrificing performance.
Regenerative braking
A hybrid electric vehicle can not connect to external sources of electricity to charge the battery. Instead, the vehicle uses regenerative braking and internal combustion engine to charge. The vehicle captures energy normally lost during braking using the electric motor as a generator and storing energy captured in the battery. Battery power provides extra power during acceleration.
Efficient fuel system design
HEVs can be either soft or complete hybrids, and full hybrids can be designed in series or parallel configurations.
1.Smooth hybrids, also called micro-hybrids, use a battery and an electric motor to help power the vehicle and may allow the engine to shut down when the vehicle stops (such as at traffic lights or stop-and-go traffic) Further improving the fuel economy. Soft hybrid systems can not power the vehicle using only electricity. These vehicles generally cost less than full hybrids, but provide less substantial fuel economy benefits than full hybrids.
2.Full hybrids have more powerful electric motors and larger batteries, which can drive the vehicle only with electric power for short distances and at low speeds. These systems cost more than mild hybrids but provide better fuel economy benefits.
There are different ways of combining the power of the electric motor and the motor. Parallel hybrids - the most common HEV design - connect the engine and electric motor to the wheels by mechanical coupling. Both the electric motor and the internal combustion engine power the wheels directly. Series hybrids, only use the electric motor to drive the wheels, are sometimes found in plug-in hybrid electric vehicles.