What are the key components of a Hybrid Electric Car?

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Key Components:

Below are the key components of a Hybrid Electric Car:


Battery (auxiliary):

In an electric drive vehicle, the auxiliary battery provides electricity to begin the car before the traction battery is engaged and also powers vehicle accessories.
DC/DC converter: This device converts higher-voltage DC power from the traction battery pack to the lower-voltage DC power needed to run vehicle accessories and recharge the auxiliary battery.


Electric generator:

Generates electricity from the rotating wheels while braking, transferring that energy back to the traction battery pack. Some vehicles use motor generators that perform both the drive and regeneration functions.


Electric traction motor:

Using power from the traction battery pack, this motor drives the vehicle’s wheels. Some vehicles use motor generators that perform both the drive and regeneration functions.


Exhaust system:

The exhaust channels the exhaust gases from the engine out through the tailpipe. A three-way catalyst is intended to cut back engine-out emissions within the exhaust.


Fuel filler:

A nozzle from a high-pressure dispenser attaches to the receptacle on the vehicle to fill the tank.


Fuel tank (gasoline):

This tank stores gasoline on board the vehicle until it’s needed by the engine. Internal combustion engine (spark-ignited): during this configuration, fuel is injected into either the manifold or the combustion chamber, where it’s combined with air, and therefore the air/fuel mixture is ignited by the spark from a sparking plug.


Power electronics controller:

This unit manages the flow of power delivered by the traction battery, controlling the speed of the electric traction motor and therefore the torque it produces.


Thermal system (cooling): 

This method maintains a correct operating temperature range of the engine, motor, power electronics, and other components.
Traction battery pack: Stores electricity to be used by the electric traction motor.



The transmission transfers mechanical power from the engine and/or electric traction motor to drive the wheels.

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