Patent ID: 8196400
Filing Date: 2012-06-12
Classification: E02F,F15B

Abstract:
1. A method for controlling pump displacement in a work vehicle, comprising detecting an operational condition of a powertrain which is adapted to propel the vehicle, wherein a power source in the powertrain is adapted to operatively drive at least one variable displacement pump, wherein the pump is adapted to operatively drive at least one hydraulic actuator via hydraulic fluid for moving a work implement and/or steering the vehicle, comparing the detected operational condition with a predetermined critical condition, limiting a maximum available displacement of the pump and thereby establishing an available pump displacement range if the magnitude of the detected operational condition is within the predetermined critical condition, detecting a hydraulic load associated to the actuator, and adjusting the pump displacement of the pump in response to the detected hydraulic load within the established available pump displacement range, and detecting a hydraulic pressure associated to the actuator, comparing the detected hydraulic pressure with a predetermined limit value and only limiting the maximum available pump displacement if the detected hydraulic pressure is above the predetermined limit value.