A device for measuring the position of a piston in a cylinder, the assembly of a cylinder, a piston and of such a device and engine comprising such an assembly of 371

摘要

The present invention relates to a device for measuring the position of a piston (2) in a cylinder (1), extending along an axis, the device comprising at least one position sensor (3, 4), which comprises a first sensor element (20, 40), a connection means between the first sensor element (20, 40) and the piston (2), and a second sensor element (10, 30), intended to be connected so as to be integral in translation to the cylinder (1), the two elements of the sensor being arranged to be movable in translation with respect to each other, along an axis parallel to the axis of the cylinder (1), the connection means between the first sensor element (20, 40) and the piston (2) being a ball joint (50). By virtue of the device of the invention, a position sensor can - to be placed in the cylinder, without the transverse forces on the piston to be transmitted, while the piston remains free in rotation about the axis of the cylinder.