Mazda's New Six Speed Transmission

Mazda Motor Corp developed a six-speed automatic transmission that can drastically improve fuel efficiency. The transmission comes in two types: a medium-torque type for gasoline vehicles and a high-torque type for diesel vehicles. Mazda expects that the medium-torque type will improve fuel efficiency by 7% compared with existing medium-torque five-speed automatic transmission's and the high-torque type will enhance fuel efficiency by 4% compared with existing high-torque six-speed automatic transmission's. Both of the types will be manufactured at the company's own factories, it said.
The new six-speed automatic transmission is called "Skyactiv-Drive" and is part of the "Skyactiv," a next-generation technology that Mazda announced on Wednesday. The improvement of fuel efficiency was realized by expanding the "lock-up" area and reducing internal resistance. Furthermore, for a smooth gear change, Mazda employed a linear solenoid valve that finely controls a mechanical clutch and an electronic control unit.

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