Method for controlling a hydraulic system of a vehicle driveline
AssigneeVolvo Truck Corporation
InventorRobin Levin
Life of this patent
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Abstract
The invention relates to a method for controlling a hydraulic system of a vehicle driveline. According to the method a transmission (13) of a driveline (2) is controlled in a limited actuation mode, if the pressure (p) is below the predetermined critical lower threshold value (Tel), wherein in the limited actuation mode the transmission (13) is controlled such that less actuator actuations is performed in comparison to a normal actuation mode.
Claims15
A method for controlling a hydraulic system of a vehicle driveline, wherein the hydraulic system at least comprises a pump, a pressure accumulator, and a hydraulic actuator arranged in fluid connection with each other, for controlling functions of the driveline, wherein the pump is arranged to supply hydraulic fluid into the hydraulic system, characterised by the steps of;
- determining a fluid pressure in the hydraulic system, comparing the determined fluid pressure with an upper threshold value and, when the determined fluid pressure is above the upper threshold value decreasing the supply of hydraulic fluid into the hydraulic system, comparing the fluid pressure of the hydraulic system with a critical lower threshold value and, when the pressure is below the critical lower threshold value, controlling a transmission of the driveline in a limited actuation mode, and wherein in the limited actuation mode the transmission is controlled such that less actuations of the actuator is performed in comparison to a normal actuation mode.
Dependencies are inferred from the claim text.