EXHAUST FLAP DEVICE FOR AN INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Issued Date -
Jan 26, 2017
app pub date -
Feb 19, 2015
filing date -
Apr 1, 2014
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Abstract
An exhaust flap device for an internal combustion engine includes a flow housing with a bearing seat, the flow housing delimiting an exhaust duct, a rotating shaft with a thermal conductivity of λ<17 W/mK, a flap body attached to the shaft in the exhaust duct, an electrical actuator with an electric motor and a gearing which has an output gear fixed on the shaft on which the flap body is arranged, an actuator housing having the actuator be arranged therein, and a first bearing with a thermal conductivity of λ>17 W/mK arranged in the bearing seat of the flow housing. The electrical actuator rotates the shaft and thereby the flap body in the exhaust duct. The shaft protrudes into the actuator housing. An inner circumference of the bearing seat corresponds to an outer circumference of the first bearing.
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