Patent ID: 8079252

Claim:
An adapter for pressure sensors for carrying out long-term cylinder pressure monitoring on internal combustion engines, the adapter comprising: a housing that defines the contour of a gas duct by its inner walls, the gas duct defining a first opening, a first connection to a cylinder cover of an internal combustion engine to generate a gas connection between the interior of a cylinder and the gas duct, a rear opening of the gas duct out of the housing having an apparatus for gastight sealing of said rear opening, a sensor connection for inserting a pressure sensor with a sensor membrane at the first opening wherein said sensor membrane in the inserted state would close the first opening in the gas duct and would be exposed to the gas within the gas duct and wherein said first opening has a transition line that forms the transition from the contour of the gas duct to the first opening wherein the transition line of the first opening is on a plane.