Pressure measuring device with additional membrane
2011
The invention relates to a pressure measuring device for detecting a pressure in a combustion chamber (26) of an internal combustion engine which is arranged in a housing (14) force-transmitting body (12) which is exposed to the combustion chamber (26) and the combustion chamber pressure to a pressure measuring unit (50) is at least indirectly transfers means of an axial movement, and having a flexible elastic membrane (16) interposed between the force-transmitting body (12) and the housing (14). The flexible elastic membrane (16) is resiliently formed so as to realize the axial motion of the power transmitting body (12) within the housing (14). The flexible elastic membrane (16) is connected upstream of the combustion chamber side a flexurally elastic auxiliary membrane (30), the bending-elastic membrane (16) to the combustion chamber (26) towards seals.
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