| 摘要 |
A piston-type accumulator comprises: a) an accumulator housing provided in the form of a cylinder tube ( 1 ) made of magnetizable material, which defines an axial direction of the housing; b) a piston ( 3 ), which can be axially displaced over a stroke path inside the cylinder tube (1) and which forms a moving separating element that, inside the accumulator housing, separates two working spaces ( 7 and 9 ) from one another; c) a magnet arrangement ( 29, 31, 35 ), which is placed on the piston ( 3 ) and which generates a field on the wall of the cylinder tube ( 1 ), and; d) a magnetic field sensor device, which is located on the exterior of the cylinder tube ( 1 ) and which has at least one Hall sensor ( 51 ). Said Hall sensor is mounted on the exterior of the cylinder tube ( 1 ) and responds to the field generated by the magnet arrangement ( 29, 31, 35 ) on the piston ( 3 ) in order to determine the position of the piston ( 3 ) along the stroke path.
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