Patent ID: 11933290
Assignee: CATERPILLAR INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. An axial piston pump controller for an axial piston pump having a fixed valve plate and a variable displacement configured to:
determine a displacement of the axial piston pump;
calculate a pump displacement control current to be supplied to the axial piston pump to control the displacement of the axial piston pump comprising:
calculating a nominal value for the pump displacement control current based on a rotational speed of the axial piston pump;
calculating a pump stiffness adjustment factor based on a pump stiffness control map having as inputs: an output pressure of the axial piston pump; and the estimated pump displacement; and
calculating the pump displacement control current to be supplied to the axial piston pump based on the nominal value and the pump stiffness adjustment factor; and

output an instruction to output the calculated pump displacement control current to the axial piston pump in order to control the displacement of the axial piston pump.