Fan drive system and management system
AssigneeKomatsu Ltd.
InventorsMitsuru Ohshiro, Kenichi Ogasawara, Masahiro Hirano
Life of this patent
Estimating the term…
Abstract
A fan drive system includes a hydraulic pump, a hydraulic motor that rotates a fan on the basis of hydraulic oil supplied from the hydraulic pump, a data acquisition unit that acquires an actual fan speed of the fan, a target amount determination unit that determines a target fan speed of the fan on the basis of a state of an object to be cooled of the fan, and an estimating unit that estimates a state of the hydraulic pump or a state of the hydraulic motor on the basis of a change of a feedback amount that indicates a difference between the target fan speed and the actual fan speed.
Claims10
A fan drive system comprising:
- a hydraulic pump;
- a hydraulic motor configured to rotate a fan on the basis of hydraulic oil supplied from the hydraulic pump;
- a data acquisition unit configured to acquire an actual fan speed of the fan;
- a target amount determination unit configured to determine a target fan speed of the fan on the basis of a state of an object to be cooled of the fan;
- and
- an estimating unit configured to estimate a state of the hydraulic pump or a state of the hydraulic motor on the basis of a change of a feedback amount indicating a deviation between the target fan speed and the actual fan speed.
A fan drive system comprising:
- a hydraulic pump;
- a hydraulic motor configured to rotate a fan on the basis of hydraulic oil supplied from the hydraulic pump;
- a data acquisition unit configured to acquire an actual fan speed of the fan;
- a target amount determination unit configured to determine a target fan speed of the fan on the basis of a state of an object to be cooled of the fan;
- and
- an estimating unit configured to estimate a state of the hydraulic pump or a state of the hydraulic motor on the basis of a change of a feedback amount indicating a deviation between the target fan speed and the actual fan speed,
- wherein the state of the hydraulic pump or the state of the hydraulic motor includes system efficiency indicating a product of volume efficiency of the hydraulic pump and volume efficiency of the hydraulic motor.
A management system, comprising:
- a server configured to be able to communicate with a fan drive system, the fan drive system comprising:
- a hydraulic pump;
- a hydraulic motor configured to rotate a fan on the basis of hydraulic oil supplied from the hydraulic pump;
- a data acquisition unit configured to acquire an actual fan speed of the fan;
- a target amount determination unit configured to determine a target fan speed of the fan on the basis of a state of an object to be cooled of the fan;
- and
- an estimating unit configured to estimate a state of the hydraulic pump or a state of the hydraulic motor on the basis of a change of a feedback amount indicating a deviation between the target fan speed and the actual fan speed,
- wherein the server is configured to acquire a plurality of the feedback amounts from a plurality of the fan drive systems, respectively, and
- the server compares the feedback amounts respectively acquired from the fan drive systems with one another, and extracts a specific fan drive system.
Dependencies are inferred from the claim text.