Patent ID: 11933374
Assignee: PIAGGIO & C. SPA
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 7:
8. A saddle-ride type vehicle comprising:
an engine;
a gearbox;
a clutch comprising at least one drive element integral with a shaft of the engine, and at least one driven element integral with an input shaft of the gearbox;
an elastic spring configured to exert a force keeping the at least one drive element and the at least one driven element in contact in a closure condition of the clutch;
a primary hydraulic pump operated via a control lever, wherein the primary pump is hydraulically connected, through a primary hydraulic circuit, to a primary piston, wherein as a result of an action on the control lever the primary piston exerts an action on the at least one drive element and the at least one driven element in opposition to the force exerted by the elastic spring, to cause a mutual detachment of the at least one drive element and the at least one driven element and determine an opening condition of the clutch;
a secondary piston connected to the primary piston; and
one or more actuators configured, during a gear change performed by the gearbox following a pilot command, to exert a predetermined force on the secondary piston and transferred thereby to the primary piston in opposition to the force exerted by the elastic spring, the predetermined force being less than the force exerted by the elastic spring so as to cause the clutch to slip without the opening condition being reached.