Patent ID: 9488626
Filing Date: 2016-11-08
CPC Classification: F16K,G01B,G01N

Claim Text:
1. A diagnostic method for poppet valves with which an actuating force (F 1 ) representing an action force that is generated by a fluid-actuated spring piston drive ( 2 ) of the poppet valve ( 100 ) is determined for at least one closing element ( 8 *) of the poppet valve ( 100 ) in the form of a force-time curve, the actuating force (F 1 ) is either determined directly or from a reaction force (F 2 ) resulting from the actuating force (F 1 ) in the poppet valve ( 100 ), wherein the actuating force (F 1 ) or the reaction force (F 2 ) is determined by measuring expanding deformations caused therefrom, and the measured, current force-time curve of the actuating force (F 1 ( t )) or of the reaction force (F 2 ( t )) is saved and subjected to an evaluation, characterized in that a displacement-time curve (h(t)) of the displacement (h) of the at least one closing element ( the current force-displacement curve determined during the operation or life of the poppet valve ( deviations are determined from the comparison of the actual switching cycle with the earlier switching cycle, wherein either deviation are determined to be within a predetermined tolerance range, and are accepted; or in the alternative, the deviations are determine to exceed the predetermined tolerance range, and a message and/or control signal is/are generated, the displacement (h) is determined by an indirectly representative physical quantity within the poppet valve ( expanding deformations caused by the generation of the displacement (h) in the drive (