Method for measuring wear of a clutch and related maintenance method, assembly comprising a clutch and a wear measurement device, and vehicle

Assembly comprising a clutch and a wear measurement device for measuring wear of the clutch,

• wherein the clutch comprises:
• a casing presenting a longitudinal axis,
• a first shaft member configured to rotate about the longitudinal axis with respect to the casing, the first shaft member including at least one friction disk extending radially with respect to the longitudinal axis,
• a second shaft member configured to rotate about the longitudinal axis with respect to the casing,
• an interface member mounted on the second shaft member so as to be moveable in translation along the longitudinal axis while being fixed in rotation with respect to the second shaft member, the interface member including at least one friction disk extending radially with respect to the longitudinal axis so as to face the friction disk of the first shaft member, the interface member being moveable between an engaged position in which the friction disk of said interface member is in contact with the friction disk of the first shaft member, and a disengaged position in which the friction disk of said interface member is spaced apart from the friction disk of the first shaft member,
• a biasing member urging the interface member towards the engaged position,
• an actuation device comprising a housing, a piston part slidably mounted within the housing and a contact part, the housing and the piston part defining a pressure chamber configured to be reversibly filled with pressurized fluid so as to reciprocate the piston part within the housing, the contact part being linked to the piston part so as to be moveable in translation along the longitudinal axis between:
• a rest position in which said contact part is spaced apart from the biasing member when the pressure chamber is empty, a gap existing between the contact part and the biasing member, and
• an active position in which the contact part is in contact with the biasing member when the pressure chamber is filled with pressurized fluid, so as to let the interface member move towards the disengaged position, and
• wherein the wear measurement device comprises:
• a source of pressurized fluid configured to inject pressurized fluid within the pressure chamber so as to put the contact part of the actuation device in contact with the biasing member,
• a sensor arrangement configured to measure at least one injection parameter chosen between a pressure and a volume of pressurized fluid while pressurized fluid is injected, the injection parameter being related to the gap between the contact part of the actuation device and the biasing member,
• a control member suitable for determining the gap between the contact part of the actuation device and the biasing member based on the injection parameter, the gap being representative of wear of the friction disks of the interface member and the first shaft member.