The example embodiment relates to a pressure measuring unit for determining the oil pressure in a motor vehicle transmission, including a circuit carrier, a pressure sensor, an electrical interface, a mechanical interface and a hydraulic interface. The pressure sensor is electrically connected to the circuit carrier by means of the electrical interface and mechanically connected to the circuit carrier by means of the mechanical interface on the first side of the circuit carrier. The hydraulic interface connecting the pressure measuring unit to a user hydraulic component is arranged on a side of the circuit carrier that is situated opposite the first side, and wherein an opening is arranged in the circuit carrier for pressure equalization between the pressure sensor and the hydraulic interface.

A method for diagnosing a lubricant containing an additive, is executed by an information processor. Chromaticity information of the lubricant which is a diagnosis target is obtained from an input device, the chromaticity information is obtained by an optical sensor, and a storage device stores a deterioration curve of the lubricant which is the diagnosis target, the deterioration curve is determined in advance regarding a transition in a chromaticity coordinate caused by a deterioration, and a chromaticity coordinate corresponding to a limit contamination level determined in advance using a contaminated lubricant. The processing device obtains a chromaticity coordinate of the lubricant from the chromaticity information and uses a relative contamination level obtained from a distance of the chromaticity coordinate of the lubricant from the deterioration curve and a distance of the chromaticity coordinate corresponding to the limit contamination level from the deterioration curve.

Disclosed herein are systems, devices, and methods related to a determination of whether an asset has a fluid issue. In particular, examples involve a platform defining a predictive model for outputting an indicator of whether an asset is likely to have a fluid issue based at least on historical fluid data for one or more assets. The historical fluid data may comprise at least one of a plurality of fluid reports for the one or more assets and an indication of a fluid issue for each fluid report. The platform may receive at least one fluid report associated with a given asset and based at least on the predictive model and the received at least one fluid report, make a determination that the given asset is likely to have a fluid issue. The platform may cause a computing device to output an indication of the determination.

A system and method for determining whether a working fluid being used in a machine is near its failure point. The system includes an impedance/admittance sensor having a flow chamber through which the working fluid flows and a pair of spaced apart electrodes. A function generator generates frequency signals at certain frequencies over a range of frequencies and a sensor circuit receives the frequency signals and provides the frequency signals to the electrodes, where the conductance of the working fluid creates a measurement signal in the sensor circuit. A processor is responsive to the measurement signal and generates a relationship between the frequency signals and the measurement signal that is indicative of a contamination level of the working fluid.

A diagnostic system for a work machine includes a data storage device (210) in which sensor information (A) input from a sensor (101A) that senses an oil property of oil used for operation of the work machine and an abnormality degree determination value defined for each kind of the sensor information (A) are stored, and an arithmetic processing device (104) that executes first processing of discriminating the degree of abnormality level of the oil based on the sensor information (A) and the abnormality degree determination value, second processing of determining whether or not necessity to carry out oil analysis involving oil extraction exists based on the degree of abnormality level of the oil discriminated in the first processing, and third processing of outputting information indicating that the oil analysis is necessary to other terminal if it is determined that the oil analysis is necessary in the second processing.

Effects of Oxygen on grease or another organic paste product can be evaluated with a modified version of the ASTM D942 test methodology for oxidation stability of lubricating greases or other organic paste products by employment of an oxidation pressure vessel, in which at least one of (A) a very small sample of the grease or other organic paste product is deployed for testing within the oxidation pressure vessel such that the sample has an enhanced surface area to mass ratio, and (B) a temperature other than about 99° C. is employed during the testing. In general, the testing is carried out under oxidation pressure conditions. The sample may be evaluated with respect to Oxygen uptake. Additional technique(s) directed to oxidation and/or other properties of the sample may be carried out before to after any Oxygen uptake evaluation, for example, FTIR analysis and/or ATR-FTIR analysis.

A method and system for diagnosing a condition of an air-breathing aircraft engine are described. The method comprises obtaining a sample of lubricating fluid from the engine, filtering the sample to obtain a plurality of particles from the lubricating fluid, obtaining chemical composition data for the plurality of particles, determining a quantity of volcanic ash in the lubricating fluid by considering each one of the particles as composed partially of volcanic ash and partially of at least one other material and determining a first percentage of surface area of the particles covered by the volcanic ash and a second percentage of the surface area of the particles covered by the at least one other material, the volcanic ash having associated thereto a predetermined chemical composition, and diagnosing a condition of the engine based on the quantity of volcanic ash found in the lubricating fluid.

A wear-indicating metalworking fluid is provided that includes a lubricant base; and a wear-indicating agent. A method of determining wear in a metalworking fluid includes providing wear-indicating metalworking fluid that contains a lubricant base and a wear indicating agent; and observing the visual appearance of the metalworking fluid. A change in visual appearance of the metalworking fluid when compared to an unused metalworking fluid indicates wear of the metalworking fluid.

An apparatus for assessment of a fluid system includes a debris monitor to receive a first flow of a fluid, the debris monitor to determine wear debris information in the first flow of the fluid; and a fluid condition monitor to receive a second flow of the fluid, the fluid condition monitor being configured to determine fluid condition information in the second flow of the fluid.

A system includes an electronic fuel injection system of an engine, the electronic fuel injection system including an electronic governor control unit for controlling various functions of the engine.