A method for predicting the critical solvent power of a visbroken residue stream of interest, CSP.sub.VisRes(OI) comprises predicting CSP.sub.VisRes(OI) from the critical percentage titrant of an atmospheric residue stream, CPT.sub.AR, the atmospheric residue stream being derived from the same crude oil as the visbroken residue stream of interest. A method for predicting the solvent power of a visbroken residue stream of interest, SP.sub.VisRes(OI), comprises predicting SP.sub.VisRes(OI) from the critical solvent power of the visbroken residue stream, CSP.sub.VisRes, and the critical percentage titrant of the visbroken residue stream, CPT.sub.VisRes. CPT.sub.VisRes is derived from the critical percentage cetane of the visbroken residue stream, CPC.sub.VisRes, which, in turn, is calculated from the P-value of the visbroken residue stream. The methods may be used to predict the stability of a fuel oil containing the visbroken residue.

A method for calculating the research octane number and the motor octane number for a liquid blended fuel. Data related to the aromatic, olefin, normal paraffin, iso-paraffin, and naphthalene properties of each of a plurality of liquid fuel blending components are acquired and transformed to obtain a transformed component property for each of the components. A reverse property transformation is performed for each of the plurality of liquid blending components. The research octane number and the motor octane number are calculated based on the performed reverse property transformation and determined percentages of each of the plurality of liquid blending components.

Methods and systems are provided for estimating ethanol content in fuel, water content in fuel, and an age of the fuel in a vehicle engine. In one example, a method may include estimating fuel ethanol content, water content, or fuel age based on a resonant frequency (f) of pressure pulsations, a change in fuel rail pressure (p), and a damping coefficient () of pressure pulsations in the fuel rail as estimated after a fuel injection or a pump stroke. One or more engine operating parameters may be adjusted based on the estimated fuel ethanol content, water content, and fuel age.

A system, method and computer program product are provided for calculating one or more indicative properties including one or more of the cetane number, octane number, pour point, cloud point and aniline point of oil fractions, from the density and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) of a sample of an oil sample.

A fuel analyzer for a fuel dispensing environment is provided including an ultrasonic transmitter configured to transmit an ultrasonic signal through a volume of fuel, an ultrasonic receiver configured to receive the ultrasonic signal, and processing circuitry. The processing circuitry is configured to receive an indication of transmission of the ultrasonic signal from the ultrasonic transmitter, receive an indication of receipt of the ultrasonic signal from the ultrasonic receiver, determine a time of flight of the ultrasonic signal, and determine a fuel purity based on the time of flight of the ultrasonic signal.

The invention includes a device (205) which prevents situations of fueling incorrect or poor-quality fuels to the tanks during fueling to the storage tanks (210) at fueling stations (200), by analyzing fuel quality and fuel type considering many physical parameters with the help of a sensor (504) that is consist of mechanical resonators, and a smart fueling elbow which has mobile characteristics making possible for the user to carry the elbow to the usage field.

This invention relates to a system and method for the evaluation of samples of a distillate fraction by spectroscopic analysis, followed by the application of chemometrics software to determine physical characteristics of the fraction.

A fluid testing system comprises a source that generates electromagnetic waves, a detector that receives the transmitted electromagnetic waves and generates analog signals corresponding to the colours represented in the electromagnetic waves and, a receptacle, having a fluid inlet and an optical inner tube with transparent walls. The receptacle is positioned between the source and the detector to enable the electromagnetic waves to pass through its walls and through a fluid sample in the receptacle. A repository stores a pre-determined range of reference values corresponding to the values of digital signals for fluids of various colours. An analog to digital converter in the system cooperates with the detector to receive the analog signals, converting them into digital signals, wherein the values are compared with the reference values by a comparator. A fluid outlet provides tested fluid. Further, a fuel supply system is disclosed for supplying fuel to a vehicle.

A system and a method for applying .sup.13C or .sup.1H NMR spectroscopy to a sample of oil in order to calculate and assign an indicative property such as cetane number, pour point, cloud point, aniline point and/or octane number of a gas oil or naphtha fraction of the crude oil.

The present disclosure provides a method for predicting a fluid type, comprising sensing, by a first sensor, mass flow data of a fluid in an engine, wherein the first sensor operates based on a first fluid property; sensing, by a second sensor, mass flow data of the fluid, wherein the second sensor operates based on a second fluid property; and detecting, by a logic circuit of a controller, a percent difference in the mass flow data provided by the first and second sensors, the percent difference indicating that the fluid is comprised of at least a first fluid type.