Patent ID: 11946225
Assignee: CATERPILLAR INC.
Field: Civil engineering (Other fields)
Classification: CPC E  F | IPC E  F

Claim 14:
15. The hydraulic system of claim 13, further comprising:
a first pressure sensor configured to sense or determine a first pressure of fluid on a first side of the second pump in the second hydraulic circuit;
a second pressure sensor configured to sense or determine a second pressure of the fluid on a second side of the second pump in the second hydraulic circuit;
an electric motor speed sensor configured to sense or determine a speed of the second electric motor and to generate a signal indicative of the sensed or determined speed of the second electric motor,
wherein the controller is communicatively coupled to the first and second pressure sensors and to the electric motor speed sensor and further configured to:
determine a pressure drop across the second pump based on a difference between the first and second pressures;
look up, on an efficiency map for the second pump, the pressure drop along a range of speeds including the sensed or determined speed of the second electric motor to identify a corresponding range of pump displacements; and
select, as the target displacement for the second pump, a pump displacement in the range of pump displacements that corresponds to the greatest efficiency.