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.

Embodiments herein relate to oil condition sensing systems and related methods. In a first aspect, an oil condition sensing system is included having a control circuit, a temperature sensor, and a fluid property sensor, wherein the fluid property sensor measures fluid properties including at least dielectric constant and the oil condition sensing system is configured to automatically detect when an oil change event has occurred, record the fluid property sensor data as new baseline fluid property data after an oil change event has occurred, and evaluate the condition of an engine oil based on a comparison with the baseline fluid property data. The oil condition sensing system can be configured to automatically detect the oil change event by evaluating signals from the fluid property sensor and interpret a change in dielectric constant and/or viscosity crossing a threshold value as an oil change event. Other embodiments are also included herein.

A method for determining a consumption amount of an engine oil of a vehicle includes starting, by a controller, an engine of the vehicle; and extracting and determining, by the controller, a consumption amount of the engine oil of the vehicle per unit time from a memory storing the consumption amount of the engine oil per unit time, in response to a speed of the started engine and an intake air pressure of the started engine.

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.

Methods and systems for failure prediction using analysis of oil or other lubricant. Raw data about feature(s) of each of a plurality of particles filtered from a fluid sample are used to categorize each particle into one of a plurality of categories, each category being defined by one or more of: chemical composition, size and morphology. Particle physical characteristics in each category are quantified to obtain a set of categorized data. The categorized data are compared with historical data. Results of the comparing are evaluated to generate a prediction of any failure or mechanism of failure.

A method is disclosed that includes determining a current level of a plurality of lubricant parameters present in a portion of lubricant, comparing the current level of each of the plurality of lubricant parameters to a threshold value corresponding to each of the plurality of lubricant parameters, analyzing a priority of each of the lubricant parameters, and determining a health status of the lubricant in response to the comparing and the analyzing.

Methods and systems for operating an aircraft engine. A health parameter for the aircraft engine is monitored by a health evaluation device, the health parameter received from a first instrument. the health parameter is compared, by the health evaluation device, to a predetermined threshold. When the health parameter reaches the predetermined threshold, the health evaluation device wirelessly transmits a fault signal to a controller associated with the aircraft engine to elicit a health response from the controller, the fault signal containing at least two mutually-exclusive fault codes associated with an operating condition of the aircraft engine monitored by a second instrument.

A vehicle system includes: at least one of: (a) a particulate matter sensor configured to measure an amount of particulate within a passenger cabin of a vehicle; and (b) a volatile organic compounds (VOC) sensor configured to measure an amount of VOCs within the passenger cabin of the vehicle; and a control module configured to, based on at least one of the amount of particulate and the amount of VOCs within the passenger cabin of the vehicle, diagnose at least one of: a characteristic of the vehicle; presence of a chemical in the passenger cabin of the vehicle; occurrence of an event within the passenger cabin of the vehicle; and a remaining life of engine oil of the vehicle.

A fuel removal method is for an internal combustion engine that has a closed- and open-loop control system and a lubricant circuit containing a lubricant. The closed- and open-loop control system has characteristic values for operation of the internal combustion engine. The method includes carrying out a load point shift starting from a first operating point of the internal combustion engine to a second operating point of the internal combustion engine with the aid of the closed- and open-loop control system. The load point shift is carried out when a fuel characteristic value, which characterizes a fuel quantity formed in the lubricant, is greater than or equal to a fuel threshold value. The second operating point having a second scavenging gradient which is greater than a first scavenging gradient of the first operating point.

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.