Patent ID: 11858171
Assignee: OSHKOSH CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. A drum drive system for a vehicle, the drum drive system comprising:
a pump configured to mechanically couple to an engine of the vehicle such that a pump speed of the pump is based on an engine speed of the engine, the pump having a variable pump displacement;
a motor fluidly coupled to the pump such that a motor speed of the motor is based on a flow of a fluid received from the pump, the motor configured to drive a drum of the vehicle to agitate contents within the drum, the motor having a variable motor displacement;
a pressure sensor positioned between the pump and the motor to acquire pressure data indicative of a pressure of the fluid flowing therebetween; and
a control system coupled to the pressure sensor, the engine, the pump, and the motor, the control system configured to:
operate the engine, the motor, and the pump to drive the drum;
receive the pressure data from the pressure sensor; and
in response to the pressure of the fluid being below a threshold pressure and a transmission of the vehicle being in neutral, and while maintaining a drum speed of the drum:
reduce the engine speed, which thereby decreases the pump speed;
reduce the variable motor displacement of the motor; and
increase the variable pump displacement of the pump.