Abstract: A sealing system for connecting a valve for fuel injection in combustion engines to a fuel rail. Prior art systems employ an O-ring as a sealing element seated in an external groove of the valve housing which ends with a groove limiting flange adjacent to a bore in the rail, whereby the O-ring has to seal radially inside (groove bottom) and outside (wall of the hollow to include the valve). The disadvantage of such known systems is that under low temperature operation conditions special material properties of the O-ring are required and that radial external leakage occurs when the material swelling decreases owing to operation stoppage. The present invention results in system leak-tightness even in temperatures below 40.degree. C. and in the case of insufficient material swelling.

Abstract: The object of the invention is a procedure for vulcanization which includes a determination of the vulcanization coefficient of an elastomeric workpiece, and an apparatus for the application of the procedure. Prior art is the measurement of the rapture strength or the penetration depth of a needle and the calculation of the vulcanization coefficient from the measured value. The disadvantage is its restriction to the application for time-consuming measurements of samples taken at not too short intervals. Series testing is excluded. The task consists in defining a procedure which leaves the workpiece undestroyed and where the measuring time is so short that it can be applied in series; and in the development of the appropriate apparatus.