Work vehicle lifting performance

摘要

A work vehicle includes a fluid circuit to operate at least one implement for performing work, the fluid circuit having at least a first operating mode and a second operating mode. The first operating mode is configured to operate within a first predetermined flow rate range within a first predetermined fluid pressure level range. The second operating mode is configured to operate within a second predetermined flow rate range and within a second predetermined fluid pressure level range. In response to the fluid circuit operating within the second operating mode, a maximum pressure value of the second predetermined fluid pressure level range is greater than a maximum pressure value of the first predetermined fluid pressure level range, and a maximum value of the second predetermined flow level range is less than a maximum value of the first predetermined flow level range.

主权项

1. A work vehicle comprising:
a fluid circuit to operate at least one implement for performing work, the fluid circuit having at least a first operating mode and a second operating mode; the first operating mode configured to operate within a first predetermined flow rate range within a first predetermined fluid pressure level range; and the second operating mode configured to operate within a second predetermined flow rate range and within a second predetermined fluid pressure level range; wherein in response to the fluid circuit operating within the second operating mode, a maximum pressure value of the second predetermined fluid pressure level range is greater than a maximum pressure value of the first predetermined fluid pressure level range, and a maximum value of the second predetermined flow level range is less than a maximum value of the first predetermined flow level range; and wherein the second operating mode comprises at least a first relief valve and a second relief valve; wherein the operating modes comprise a first control valve to selectably control flow to the first relief valve; and wherein in response to the first control valve being urged to a closed position, the maximum value of the first predetermined flow level range is increased to the pressure value required to overcome the blocked position of the second relief valve and the first predetermined flow level range corresponds to operation of a loader of the work vehicle, and the second predetermined flow level range corresponds to operation of a backhoe of the work vehicle.