DEVICE AND METHOD FOR DETERMINING THE STATE OF AGEING OF A HYDRAULIC FLUID OF A HYDRAULIC SYSTEM OF A VEHICLE
First Claim
1. A device for determining ageing of a hydraulic fluid in a hydraulic system with a multitude of hydraulic components, comprising:
- at least one temperature determination device that determines the respective temperature of each discrete fluid volume of the hydraulic fluid in the hydraulic system; and
at least one ageing determination device that determines an increase in ageing of the hydraulic fluid from a size and the temperature of each discrete fluid volume and from a specified observation period.
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Accused Products
Abstract
A device for determining ageing of a hydraulic fluid in a hydraulic system with a multitude of hydraulic components is provided. The device comprises at least one temperature determination device and at least one ageing determination device, wherein the temperature determination device determines the respective temperature of each discrete fluid volume of the hydraulic fluid in the hydraulic system, and from the aforesaid the ageing determination device determines an increase in ageing. Generally, the temperature determination device carries out a numerical thermal simulation of the hydraulic system, component by component, including determining at least one temperature of at least one hydraulic component of the hydraulic system, which simulation is supported by measuring the temperatures of individual hydraulic components by means of temperature sensors.
27 Citations
17 Claims
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1. A device for determining ageing of a hydraulic fluid in a hydraulic system with a multitude of hydraulic components, comprising:
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at least one temperature determination device that determines the respective temperature of each discrete fluid volume of the hydraulic fluid in the hydraulic system; and at least one ageing determination device that determines an increase in ageing of the hydraulic fluid from a size and the temperature of each discrete fluid volume and from a specified observation period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for determining ageing of a hydraulic fluid in a hydraulic system comprising a multitude of hydraulic components, comprising:
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determining the temperature of a discrete fluid volume within at least one hydraulic component; generating an observation period; determining an increase in ageing of a respective discrete fluid volume by means of an ageing determination device; and aggregating all the determined increases in ageing to form an overall increase in ageing of at least one observation period. - View Dependent Claims (10, 11)
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12. An aircraft, comprising:
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at least one hydraulic system that includes a hydraulic fluid; at least one temperature determination device that determines the respective temperature of each discrete fluid volume of the hydraulic fluid in the hydraulic system; at least one ageing determination device that determines an increase in ageing of the hydraulic fluid from the size and the temperature of each discrete fluid volume and from a specified observation period; and a calculation unit that determines, from the respective increases in ageing of the discrete fluid volumes over a predetermined duration, the entire increase in ageing of the hydraulic fluid contained in the hydraulic system. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification