Author: By LINDSAY BROOKE

G.M. estimates that the plug-in hybrid’s higher-torque 1.5-liter engine and improved batteries will increase the Volt’s range by up to 12 percent.

The turbocharger, the engine component that uses the exhaust’s hot air to increase horsepower, is performing new tricks. It is now also producing electrical power for hybrid systems.

Both General Motors and Honda, two automakers considered leaders in the technology, said they could reduce costs and development time by working on a common design.

A look at the machinery to be revealed at the Detroit auto show suggests that the era of the electric automobile has finally arrived.