Vehicle clutch with variable lever ratio

A vehicle clutch comprising:

• at least one clutch disc (111, 6) to be selectively brought into and out of engagement;
• a moveable pressure plate (307, 8) to selectively squeeze said at least one clutch disc into and out of engagement in order to drivingly connect and disconnect a propulsion unit to driving wheels;
• a plurality of clutch levers (106, 2) to selectively cause said pressure plate to move;
• an actuator (121) to cause said pressure plate to move by pivoting said clutch levers;
• where each of said clutch levers are pivotable around:
• a first fulcrum (306, 9), which is part of an element firmly attached to said clutch housing;
• a second fulcrum (308, 9), which is part of an element firmly attached to said pressure plate,
• and a third fulcrum (122, 310, 9), which is part of an element firmly attached to said actuator;
• where a pivot surface (S, S12) of each of said fulcrums around which said clutch levers pivot with a rolling action over said pivot surface is defined by a radius (r, r12), which measures from a geometrical centre (C) in each of said fulcrums and out to said pivot surface,
• characterized in that a magnitude of at least one of said radius varies along said pivot surface in order to have a lever ratio of said clutch levers that varies as said clutch levers pivot.