| 摘要 |
The invention relates to an exhaust gas heat exchanger ( 2 ), especially for motor vehicles, comprising a main flow path and a secondary flow path (bypass) for the exhaust gas. Said heat exchanger comprises a valve device ( 3 ) which is used to control the exhaust gas flow and can be actuated by a servomotor ( 4 ) by means of a transmission device ( 8, 6 ), the valve device ( 3 ) comprising a valve closing member fixed to a valve shaft (a). According to the invention, the valve shaft (a) can be loaded by a torsion spring ( 5 ) which can be supported on the valve shaft and on the valve device ( 3, 3 a).
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