The HLA system is a so-called parallel hydraulic hybrid.

They are called "parallel hybrids," and the New Bus is a "series hybrid."

Seven teams built "parallel hybrids," which let the electric motor and the gasoline engine pool their horsepower to turn the wheels.

Although both of these cars are modified parallel hybrids, they are actually quite different in character.

It is a specific implementation of a parallel hybrid.

In a parallel hybrid, two power sources can turn the wheels.

A parallel hybrid, the Prius has an electric motor that powers the car up to 12 m.p.h., when gas-engine emissions are highest.

Power-split hybrid or series-parallel hybrid are parallel hybrids.

Two major categories are series hybrids and parallel hybrids, though parallel designs are most common today.

As a result, in a parallel hybrid, both the electric motor and the gas engine can provide propulsion power.