Airbus Operations Gmbh

Volker Baumbach

Fraser Wilson

Ralf-Henning Stolte

Andreas Helwig

Robert Marinus Behr

Gerhard Müller

Ralf Henning Stolte

Sumit Paul

Harald Gründel

An aircraft comprises a landing gear assembly on a part of which is mounted a motor for driving a wheel of the landing gear assembly, for example to enable the aircraft to perform taxiing manoeuvres. The motor is a liquid-cooled motor and the liquid that is used to cool the motor is hydraulic fluid, preferably hydraulic fluid taken from a hydraulic system that already exists on the aircraft to supply other consumers of hydraulic fluid pressure on the aircraft. The hydraulic fluid thus has other utility (i.e. other than cooling the motor) on the aircraft and therefore has a significant volume (and therefore a significant heat capacity). There may be a need to convert from high pressure hydraulic fluid to a lower pressure supply.

Cooling of a motor for driving an aircraft wheel

The invention relates to a contamination recording apparatus () for recording contaminations in a flowing hydraulic fluid () to be examined in aircraft (), which comprises a conveying device () for conveying the flowing hydraulic fluid (), a light source () for exposing the hydraulic fluid () flowing in the conveying device () to light (), and a detection device () for recording a fraction of the light () absorbed by the exposed hydraulic fluid (), the light source () being formed in order to emit light () having a wavelength in the near-infrared range. The invention furthermore relates to a hydraulic system () equipped with such a contamination recording apparatus () and to an aircraft (), and also to a method for recording contaminations in a hydraulic fluid () flowing in a hydraulic system () of an aircraft ().

Device and method for recording contaminations in a hydraulic system

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.

Device and method for determining the state of ageing of a hydraulic fluid of a hydraulic system of a vehicle

A system utilizing synergetic potentials at different systems such as of a fuel cell system and of an aircraft hydraulic system, through coupling them via a common cooling circuit system.

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Ritterhude, Germany

Volker Baumbach