Patent ID: 9303633
Filing Date: 2016-04-05
CPC Classification: F04B,F16H

Claim Text:
1. A hydraulic power control system, comprising: an engine operating at an engine speed, the engine speed sensed by an engine speed sensor providing an engine speed signal; a variable displacement pump connected to and operated by the engine, the variable displacement pump fluidly connected to a first passageway and a second passage way, the variable displacement pump having a selectively variable displacement that is adjusted in response to a pump displacement command signal; a variable displacement hydraulic motor fluidly connected to the first and second passageways in a closed hydraulic loop with the variable displacement pump, the variable displacement hydraulic motor operating by a flow of hydraulic fluid originating from the variable displacement pump and passing through the first and second passageways, the variable displacement hydraulic motor having a selectively variable displacement that is controlled in response to a motor control signal, the motor operating at a motor speed, the motor speed is sensed by a motor speed sensor providing a motor speed signal; a waste flow valve fluidly interconnecting the first and second passageways; and a controller associated with the engine, the variable displacement pump and the variable displacement hydraulic motor, the controller disposed to: