Patent ID: 11885398
Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B  Y | IPC F

Claim 9:
10. The power transmission device for the vehicle according to claim 9, comprising
a controller changing the set value of the electromagnetic relief valve, and controlling connection and release of the first clutch, the second clutch and the third clutch, wherein
when the controller is switched from a first state of transmitting the rotation of the input shaft to the output shaft via the planetary continuously variable transmission mechanism by releasing the first clutch and connecting both the second clutch and the third clutch to a second state of transmitting the rotation of the input shaft to the output shaft by bypassing the planetary continuously variable transmission mechanism by connecting the first clutch and releasing both the second clutch and the third clutch,
the controller provides the communicating state between the pair of main lines in one direction and the blocking state in the opposite direction.