KBB Green Glossary

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Parallel hybrid

The most common hybrid system today has both power sources connected to the drivetrain

Partial Zero Emissions Vehicle (PZEV)

Per the California Air Resources Board, a gasoline engine that meets SULEV tailpipe emissions standards, emits zero evaporative emissions and has a 15-year, 150,000-mile warranty on the emissions equipment

PHEV (plug-in hybrid vehicle)

A hybrid vehicle with greater batter capacity than traditional hybrids, allowing it to travel on electricity alone (with limited range) after an overnight charge from a home electrical outlet, for instance

Renewable fuels

Unlike fossil fuels such as petroleum and natural gas, of which there are finite amounts on the planet, renewable fuels can be “grown” or otherwise replenished in short order

Series hybrid

In a series hybrid, one power source motivates the vehicle, while the second power source charges or otherwise empowers the first. Range-Extended Electric Vehicles, for instance, are essentially electric vehicles that charge their own batteries via an on-board internal combustion generator.

Super Ultra Low Emissions Vehicle (SULEV)

Per the California Air Resources Board, vehicles that emit significantly lower levels (up to 90-percent lower) of carbon monoxide, hydrocarbons, particulate matter and nitrous oxides into the air than an average new vehicle

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