Patent ID: 8065934
Filing Date: 2011-11-29
Classification: F16H,F28D,F28F,Y10T

Abstract:
1. A transmission ( 8 ) comprising a transmission housing ( 26 ) which has a recess ( 56 ) and a region that is remote from the recess ( 56 ) in which gear wheels ( 66 , 68 ) rotate and a heat exchanger ( 30 ) that is supported within a sealing element ( 72 ), a coolant flows through coolant lines in the heat exchanger ( 30 ) and absorbs heat generated in the transmission ( 8 ) and conducted to the heat exchanger ( 30 ) via a transmission lubricant which releases the heat to the coolant conducts the heat away from the transmission ( 8 ), a bypass valve ( 48 ) is supported by the heat exchanger ( 30 ) and directs the transmission lubricant to bypass the heat exchanger ( 30 ) when the transmission lubricant is at a predefined low pressure and an excess pressure, the bypass valve ( 48 ) comprises a poppet valve having a valve cover ( 52 ) and a valve cover spring ( 50 ) and the transmission housing ( 26 ) comprises a valve seat ( 54 ) that is located within the recess ( 56 ), the heat exchanger ( 30 ) is inserted within the recess ( 56 ) such that the valve cover ( 52 ) contacts the valve seat ( 54 ), and the sealing element ( 72 ) contacts the transmission housing ( 26 ), the sealing element ( 72 ) and the transmission housing ( 26 ) define a bypass duct therebetween which directs the transmission lubricant to bypass the heat exchanger ( 30 ).