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Hybrid Vehicle Technologies
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Hybrid Drive Control Unit (HDCU)
A computer that manages how and when to use the electric motor and internal combustion engine in a hybrid vehicle.
Series Hybrid
A hybrid vehicle design where the internal combustion engine drives a generator to produce electricity, which then powers the electric motor.
Exhaust Heat Recovery System
A system that uses waste heat from the ICE exhaust to improve efficiency in hybrid vehicles.
Regenerative Braking
A system that recovers kinetic energy during braking and converts it into electrical energy that is stored in the battery.
Electric Motor
A machine that converts electrical energy into mechanical energy, used in hybrid vehicles to provide power to the wheels.
Power-Split Device
A planetary gear set in hybrid vehicles that allows for power to be 'split' between the electric motor, ICE, and wheels.
Plug-In Hybrid Electric Vehicle (PHEV)
A hybrid vehicle with a larger battery capacity that can be recharged by plugging into an external electric power source.
Stop-Start System
A feature in hybrid and some conventional vehicles that automatically shuts off and restarts the ICE to reduce idle time and save fuel.
Energy Management System (EMS)
The system in hybrid vehicles responsible for controlling the flow and storage of energy.
Continuous Variable Transmission (CVT)
A type of transmission that can change seamlessly through a continuous range of effective gear ratios, used in some hybrids.
Internal Combustion Engine (ICE)
A type of engine that generates mechanical power by burning a fuel-air mixture within the engine cylinders.
State of Charge (SoC)
The available capacity of a battery expressed as a percentage of its total capacity; important for managing a hybrid's energy.
Hybrid Vehicle Battery
A high-capacity battery used to store energy for the electric motor in hybrid vehicles.
Parallel Hybrid
A hybrid vehicle where the electric motor and internal combustion engine are connected in parallel to jointly power the wheels.
Hybrid Electric Vehicle (HEV)
A vehicle that combines an ICE with an electric powertrain to improve fuel efficiency and reduce emissions.
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