Chrysler Bolsters AWD Fuel Economy

All-wheel-drive vehicles’ fuel economy ratings typically begin about 1 mpg lower than their two-wheel-drive counterparts because of their design. According to the Detroit Free Press, Chrysler has devised a new drivetrain design to fix that, giving all-wheel-drive vehicles like the Chrysler 300 and Dodge Charger the same fuel ratings as their rear-drive counterparts.
All-wheel-drive vehicles lose some efficiency because their engines send power to the front axle even when it’s not necessary. Chrysler's new design will disconnect the front axle from the drivetrain under normal driving circumstances. Only when additional control is needed will the drivetrain reconnect.

This was just one of several new technologies Chrysler unveiled at its technical center in Auburn Hills, Mich., this past Friday and will be included in all AWD 2009 models.

Fuel Economy Boosted in All-Wheel-Drive Cars (Detroit Free Press)