US 12,135,049 B2 · Intelligent filtration for electric-hydraulic work vehicles

Abstract

An intelligent work vehicle filtration system includes a hydraulic subsystem, a controller architecture, and an electric drive subsystem containing a battery pack. A hydraulic subsystem includes, in turn, a fine filter device having a first filter efficiency, a coarse filter device having a second filter efficiency less than the first filter efficiency, a hydraulic circuit in which the fine filter device and the coarse filter device are positioned, and a hydraulic pump controllable to circulate hydraulic fluid about the hydraulic circuit. During operation of the intelligent work vehicle filtration system, the controller architecture selectively places the intelligent work vehicle filtration system in an externally-powered filter mode in which hydraulic flow is directed through the fine filter device, while bypassing the coarse filter device, when the electric drive subsystem is electrically coupled to an external power supply utilized to charge the battery pack.

Claims20

Dependent claims

An intelligent work vehicle filtration system onboard an electric-hydraulic (E/H) work vehicle, the intelligent work vehicle filtration system comprising:

an electric drive subsystem containing a battery pack;
a hydraulic subsystem, comprising:
a fine filter device having a first filter efficiency;
a coarse filter device having a second filter efficiency less than the first filter efficiency;
a hydraulic circuit in which the fine filter device and the coarse filter device are positioned;
and
a hydraulic pump controllable to circulate hydraulic fluid about the hydraulic circuit;
and
a controller architecture coupled to the electric drive subsystem, the controller architecture having processing architecture configured to execute control logic to determine that the electric drive subsystem is electrically coupled to an external power supply and selectively place the intelligent work vehicle filtration system in an externally-powered filter mode in which hydraulic flow is directed through the fine filter device, while bypassing the coarse filter device, when the electric drive subsystem is electrically coupled to the external power supply utilized to charge the battery pack.

6 more elements

A method carried-out by a controller architecture included in an intelligent work vehicle filtration system onboard an electric-hydraulic (E/H) work vehicle, the E/H work vehicle including an electric drive subsystem and a hydraulic subsystem containing a hydraulic pump, the method comprising:

monitoring when the electric drive subsystem is electrically coupled to an external power supply utilized to charge a battery pack included in the electric drive subsystem;
and
based, at least in part, on whether the electric drive subsystem is electrically coupled to the external power supply, selectively placing the intelligent work vehicle filtration system in:
an externally-powered filter mode in which hydraulic flow is directed through a fine filter device contained in the hydraulic subsystem, while bypassing a coarse filter device further contained in the hydraulic subsystem;
and
a battery-powered filter mode in which the hydraulic flow is directed through the coarse filter device, while bypassing the fine filter device, to reduce energy demands placed on the battery pack when powering the hydraulic pump during operation of the E/H work vehicle.

3 more elements

Dependencies are inferred from the claim text.

Intelligent filtration for electric-hydraulic work vehicles

Life of this patent

Intelligent filtration for electric-hydraulic work vehicles

Life of this patent

Abstract

Claims20