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Prius: Latin word meaning "to go before" or "before its predecessors.”

Prius = Hybrid Pioneer

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Hybrid SystemsConcepts/Definitions

Objectives1. Definition of a Hybrid System2. Main Hybrid Systems Components3. Classification of Hybrids4. Types of Hybrid Drivetrain

Source: www.hybridcenter.org 3

Hybrid Systems DefinitionDefinition

“A hybrid is the combination of two or more different things, aimed at achieving a particular objective or goal”

Hybrid Vehicle “A hybrid electric vehicle combines an internal

combustion engine and an electric motor powered by batteries, merging the best features of today's combustion engine cars and electric vehicles.”

Source: www.hybridcenter.org 4

Key Components

Source: www.hybridcenter.org 5

1. ICE2. Generator3. The Inverter4. Power Splitter5. Electric Motor6. Battery Pack7. Electronic Modules

Steps for Hybridization

1. Idle-off capability 2. Regenerative braking capacity 3. Power Assist and Engine downsizing (“mild"

hybrid)

4. Electric-only drive ("full" hybrid)

5. Extended battery-electric range ("plug-in" hybrid)

Source: www.hybridcenter.org 6

Source: www.hybridcenter.org 12

Hybrids Drivetrains

Source: www.hybridcenter.org 13

Series/ Engine Assist• Only the electric motor is used to propel the vehicle at very low speeds

• When desiring greater speeds, the gasoline motor kicks in• Most suited for urban lifestyle and driving around the city

Parallel/ Electric Assist• Both the Electric Motor and Gasoline Engine generate power to propel vehicle

• More suited for highway driving due to the fact that the electric motor only kicks in when the gasoline engine requires an additional boost

Parallel/Series – Two Mode• a combination of the petroleum and electric assist engines uses twin electric motors ideal for both low and high speed driving

Wrap-upHybrid System Definition

Internal combustion engine and an electric motor powered by batteries

Main Hybrid Systems Components: engine, electric motors, generators, inverter, power splitter, battery pack , electronics

Classification1. Conventional Vehicle2. Mild Hybrid3. Full Hybrid4. Plug-in Hybrid

Types of Drivetrains1. Series – Engine Assist2. Parallel – Electric Assist 3. Parallel/Series – Two Mode

Source: www.hybridcenter.org 14

Q&A

Source: www.hybridcenter.org 15