The lightweight differential of Schaeffler INA has been completely redesigned. The architecture of the space-saving component differs completely from the design of traditional differentials. In place of the previously used bevel differential gears has the lightweight differential on a plane arranged on the gears with spur gear teeth in the form of planetary gears, as are used in automatic transmissions for use. Thus the required space and weight are significantly lower, the potential torque capacity is noticeably larger.
"The benefits of the lightweight, or spur gear is enormous," explains Dr. Tomas Smetana, Manager Advanced Transmission Division in the Schaeffler Group Automotive. "We're saving up to 30% weight compared to conventional bevel gear while creating the slim design axial clearances of up to 70%. Concretely, this means a loss of up to three kg of mass per differential and 90 mm additional space in the wheel "can be realized with the differential increasing engine torques. The recovered space in the gear to make room for larger double clutches or transfer case and electronic components for modern hybrid solutions. "The narrow design of Leichbaudifferenzials also allows the use of friction-optimized storage concepts, thereby making a measurable contribution to reducing fuel consumption and CO2Emissions, "says Norbert Indlekofer, President of Schaeffler Group Automotive and responsible for the divisions transmission and chassis systems.