Patent application number | Description | Published |
20130002232 | FRAME SEQUENCE FOR A CELL VOLTAGE MEASUREMENT SYSTEM WITH A LOW PROBABILITY OF NATURAL OCCURRENCE - A method for providing calibration and synchronization pulses in a pulse width modulation (PWM) signal including cell voltage measurement pulses, where the calibration pulses are four calibration pulses having a pattern of a narrow width high voltage pulse followed by a wide width low voltage pulse followed by a narrow width high voltage pulse followed by a wide width low voltage pulse that has a very low probability of occurring in a practical fuel cell system. The method modulates a combined sequence of the voltage measurement signals and the calibration pulses using an inverted saw tooth wave to provide the PWM signal, where a width of the pulses representing the voltage signals are proportional to a width of the pulses representing the calibration pulses. | 01-03-2013 |
20130004871 | METHOD OF PROVIDING A CALIBRATING REFERENCE VOLTAGE AND INDEX SYNCHRONIZATION SEQUENCE FOR A CELL VOLTAGE MEASUREMENT SYSTEM - A method for providing calibration synchronization pulses in a pulse width modulation (PWM) signal including fuel cell voltage measurement pulses. The method includes providing a sequence of voltage signals representative of the voltage of the fuel cells in a fuel cell group, where the sequence of voltage signals are provided in the order of the position of the fuel cells in the group. The method also includes providing a sequence of calibration pulses and combining the sequence of voltage signals and the sequence of calibration pulses so that the calibration pulses are provided before a voltage signal of a first cell in the group. The method modulates the combined sequence of the voltage signals and the calibration pulses using an inverted saw tooth wave to provide the PWM signal, where a width of the pulses representing the voltage signals are proportional to a width of the pulses representing the calibration pulses. | 01-03-2013 |
20140025320 | Redundancy For Improved Stack Health Monitoring Reliability - A health monitoring system for a fuel cell stack using current fuel cell architecture to enable the electronic control unit (ECU) to continue to monitor the health of the fuel cell stack despite a component failure. The system uses an embedded measurement module (EMM) connected to a group of fuel cells in the fuel cell stack to monitor the health of that group of fuel cells. The EMM produces a pulse width modulation signal that is sent to the ECU. A total voltage value for the group of fuel cells is embedded into the calibration signal or end of frame sequence. The ECU uses an algorithm to determine a missing voltage of at least one fuel cell in the event of the component failure of that fuel cell by adding up the cumulative value for each fuel cell reporting their voltage and subtracting that value from the total voltage value found in the end of frame sequence. | 01-23-2014 |
20140167775 | SYSTEMS AND METHODS FOR MEASURING HIGH FREQUENCY RESISTANCE IN A FUEL CELL SYSTEM - System and methods for measuring operating parameters of a fuel cell system are presented. In certain embodiments, the systems and methods may be configured to measure a high frequency resistance of a fuel cell system. A method for measuring a high frequency resistance of a fuel cell system may include inducing a current signal and a voltage signal through the FC system at a center frequency using a switched load. The current signal and the voltage signal may then be measured and filtered to isolate the current signal and the voltage signal from noise signals occurring in the FC system. A high frequency resistance of the FC may then be calculated based on the filtered current and voltage signals. | 06-19-2014 |
Patent application number | Description | Published |
20110184661 | VISUAL INSPECTION-BASED GENERATOR RETENTION ASSEMBLY TIGHTNESS DETECTION - A method and apparatus for visually detecting and measuring retention assembly tightness are disclosed. In an embodiment, an optical device is used to obtain at least an image of a retention assembly, the optical device being insertable into a slot between two stator core laminations and directable toward a side view of the retention assembly. The image is displayed on a display, and a measurer is used to determine a tightness of a retention assembly. | 07-28-2011 |
20110301874 | SYSTEM AND METHOD FOR DETERMINING WEDGE TIGHTNESS - A system and method for determining wedge tightness in a dynamoelectric machine is provided. The dynamoelectric machine includes a rotor, stator and a wedge assembly having at least one wedge for retaining a coil. The system includes a force application device for applying a predetermined force or a known quantity of force to a wedge, and the force is applied in a substantially radial direction. A measuring device for measuring movement of the wedge, measures a movement distance relative to a surface of an adjacent core surface. The system can be inserted between the rotor and the stator, and the movement distance is obtained by evaluating a distance to an adjacent core surface and a distance to a surface of the wedge. | 12-08-2011 |
20130232792 | APPARATUS AND METHOD FOR SERVICING TURBOMACHINERY COMPONENTS IN-SITU - An apparatus adapted for servicing a turbomachine component includes a tool delivery mechanism adapted for delivering a tool to a desired location in a turbomachine. A tool support is adapted to be secured onto the body of the turbomachine, and is also configured to support the tool delivery mechanism. A machining tool is attached to the tool delivery mechanism, and includes an axial slide clamp configured to clamp to the turbomachine component, a radial slide slidably connected to the axial slide clamp, a spring connected to the axial slide clamp and the radial slide, the spring providing axial tension, and a machining bit retained at least partially within the radial slide. The apparatus is adapted to service the component of the turbomachine in-situ. | 09-12-2013 |
Patent application number | Description | Published |
20100088949 | METHOD OF CONDITIONING AN INTERNAL COMBUSTION ENGINE - A method of Improving the efficiency of a diesel engine provided with a source of diesel fuel includes the steps of: a) adding to the diesel fuel a reverse-micellar composition having an aqueous first disperse phase that includes a free radical initiator and a first continuous phase that includes a first hydrocarbon liquid, a first surfactant, and optionally a co-surfactant, thereby producing a modified diesel fuel; and b) operating the engine, thereby combusting the modified diesel fuel. The efficiency of a diesel engine provided with a source of diesel fuel and a source of lubricating oil can also be improved by modifying the lubricating oil by the addition of a stabilized nanoparticulate composition of cerium dioxide. The efficiency of a diesel engine can also be improved by adding to the diesel fuel a reverse-micellar composition that includes an aqueous disperse phase containing boric acid or a borate salt. | 04-15-2010 |
20100199547 | CERIUM DIOXIDE NANOPARTICLE-CONTAINING FUEL ADDITIVE - A fuel additive composition includes: a) a reverse-micellar composition having an aqueous disperse phase that includes cerium dioxide nanoparticles in a continuous phase that includes a hydrocarbon liquid, a surfactant, and optionally a co-surfactant and b) a reverse micellar composition having an aqueous disperse phase that includes a cetane improver effective for improving engine power during fuel combustion. A method of making a cerium-containing fuel additive includes the steps of: a) providing a mixture of a nonpolar solvent, a surfactant, and a co-surfactant; and b) combining the mixture with an aqueous suspension of stabilized cerium dioxide nanoparticles. | 08-12-2010 |
20130047945 | METHOD OF CONDITIONING AN INTERNAL COMBUSTION ENGINE - A method of improving the efficiency of a diesel engine provided with a source of diesel fuel includes the steps of: a) adding to the diesel fuel a reverse-micellar composition having an aqueous first disperse phase that includes a free radical initiator and a first continuous phase that includes a first hydrocarbon liquid, a first surfactant, and optionally a co-surfactant, thereby producing a modified diesel fuel; and b) operating the engine, thereby combusting the modified diesel fuel. The efficiency of a diesel engine provided with a source of diesel fuel and a source of lubricating oil can also be improved by modifying the lubricating oil by the addition of a stabilized nanoparticulate composition of cerium dioxide. The efficiency of a diesel engine can also be improved by adding to the diesel fuel a reverse-micellar composition that includes an aqueous disperse phase containing boric acid or a borate salt. | 02-28-2013 |
20130118060 | CERIUM DIOXIDE NANOPARTICLE-CONTAINING FUEL ADDITIVE - A fuel additive composition includes: a) a reverse-micellar composition having an aqueous disperse phase that includes cerium dioxide nanoparticles in a continuous phase that includes a hydrocarbon liquid, a surfactant, and optionally a co-surfactant and b) a reverse micellar composition having an aqueous disperse phase that includes a cetane improver effective for improving engine power during fuel combustion. A method of making a cerium-containing fuel additive includes the step of: a) providing a mixture of a nonpolar solvent, a surfactant, and a co-surfactant; and b) combining the mixture with an aqueous suspension of stabilized cerium dioxide nanoparticles. | 05-16-2013 |
20130230444 | METHOD OF CONDITIONING AN INTERNAL COMBUSTION ENGINE - A method of improving the efficiency of a diesel engine provided with a source of diesel fuel includes the steps of: a) adding to the diesel fuel a reverse-micellar composition having an aqueous first disperse phase that includes a free radical initiator and a first continuous phase that includes a first hydrocarbon liquid, a first surfactant, and optionally a co-surfactant, thereby producing a modified diesel fuel, and b) operating the engine, thereby combusting the modified diesel fuel. The efficiency of a diesel engine provided with a source of diesel fuel and a source of lubricating oil can also be improved by modifying the lubricating oil by the addition of a stabilized nanoparticulate composition of cerium dioxide. The efficiency of a diesel engine can also be improved by adding to the diesel fuel a reverse-micellar composition that includes an aqueous disperse phase containing boric acid or a borate salt. | 09-05-2013 |
Patent application number | Description | Published |
20100152077 | Process for Solvent Shifting a Nanoparticle Dispersion - A process for replacing the continuous phase of a nanoparticle dispersion with a less polar phase, includes filtering the dispersion through a semi-permeable membrane filter to remove the continuous phase, and introducing a less polar phase. | 06-17-2010 |
20110056123 | METHOD OF PREPARING CERIUM DIOXIDE NANOPARTICLES - A method of making cerium dioxide nanoparticles includes: a) providing an aqueous reaction mixture having a source of cerous ion, a source of hydroxide ion, a nanoparticle stabilizer, and an oxidant at an initial temperature no higher than about 20° C.; b) mechanically shearing the mixture and causing it to pass through a perforated screen, thereby forming a suspension of cerium hydroxide nanoparticles; and c) raising the initial temperature to achieve oxidation of cerous ion to eerie ion and thereby form cerium dioxide nanoparticles having a mean diameter in the range of about 1 nm to about 15 nm. The cerium dioxide nanoparticles may be formed in a continuous process. | 03-10-2011 |
20120124899 | FUEL ADDITIVE CONTAINING LATTICE ENGINEERED CERIUM DIOXIDE NANOPARTICLES - A process for making cerium dioxide nanoparticles containing at least one transition metal (M) utilizes a suspension of cerium hydroxide nanoparticles prepared by mechanical shearing of an aqueous mixture containing an oxidant in an amount effective to enable oxidation of cerous ion to ceric ion, thereby forming a product stream that contains transition metal-containing cerium dioxide nanoparticles, Ce | 05-24-2012 |
20150059236 | CERIUM OXIDE CONTAINING NANOPARTICLES - A process for making cerium-containing oxide nanoparticles includes providing an aqueous reaction mixture containing a source of cerous ion, optionally a source of one or more metal ions (M) other than cerium, a source of hydroxide ion, at least one monoether carboxylic acid nanoparticle stabilizer wherein the molar ratio of said monoether carboxylic acid nanoparticle stabilizers to cerous ions is greater than 0.2, and an oxidant. The cerous ion is oxidized to ceric ion, thereby forming a product dispersion of cerium-containing oxide nanoparticles CeO | 03-05-2015 |
20150059237 | CERIUM-CONTAINING NANOPARTICLES - A process for making cerium-containing oxide nanoparticles includes providing an aqueous reaction mixture containing a source of cerous ion, optionally a source of one or more metal ions (M) other than cerium, a source of hydroxide ion, at least one monoether carboxylic acid nanoparticle stabilizer wherein the molar ratio of said monoether carboxylic acid nanoparticle stabilizers to total metal ions is greater than 0.2, and an oxidant. The cerous ion is oxidized to ceric ion, thereby forming a product dispersion of cerium-containing oxide nanoparticles, optionally containing one or more metal ions (M), Ce | 03-05-2015 |
Patent application number | Description | Published |
20120117863 | CERIUM CONTAINING NANOPARTICLES PREPARED IN NON-POLAR SOLVENT - A method of making cerium-containing metal oxide nanoparticles in non-polar solvent eliminates the need for solvent shifting steps. The direct synthesis method involves: (a) forming a reaction mixture of a source of cerous ion and a carboxylic acid, and optionally, a hydrocarbon solvent; and optionally further comprises a non-cerous metal ion; (b) heating the reaction mixture to oxidize cerous ion to ceric ion; and (c) recovering a nanoparticle of either cerium oxide or a mixed metal oxide comprising cerium. The cerium-containing oxide nanoparticles thus obtained have cubic fluorite crystal structure and a geometric diameter in the range of about 1 nanometer to about 20 nanometers. Dispersions of cerium-containing oxide nanoparticles prepared by this method can be used as a component of a fuel or lubricant additive. | 05-17-2012 |
20130273659 | NANOPARTICLES OF CERIUM AND AMINO ACIDS - A process for making nanoparticles of biocompatible materials is described, wherein an aqueous reaction mixture comprising cerous ion, an α-amino acid, an oxidant and water is provided along with temperature conditions to effectively form nanoparticles. These biocompatible nanoparticles may be further conjugated to biologically active agents, such as plasmid DNA, siRNA or proteins, such that a cell transfection agent is formed. | 10-17-2013 |
20130337083 | NANOCERIA FOR THE TREATMENT OF OXIDATIVE STRESS - A process for making nanoparticles of biocompatible materials is described, wherein an aqueous reaction mixture comprising cerous ion, citric acid and ethylenediaminetetraacetic acid in a predetermined ratio, an oxidant, and water is provided along with temperature conditions to directly form, without isolation, a stable dispersion of cerium oxide nanoparticles. These biocompatible cerium oxide nanoparticles may be used to prevent and/or treat oxidative stress related diseases, such as stroke, relapse/remitting multiple sclerosis, chronic-progressive multiple sclerosis, amyotrophic lateral sclerosis, and ischemic reperfusion injury. | 12-19-2013 |
20130337084 | NANOCERIA WITH CITRIC ACID ADDITIVE - A process for making nanoparticles of biocompatible materials is described, wherein an aqueous reaction mixture comprising cerous ion, citric acid, an oxidant, and water, is adjusted to a predetermined range of pH, held at temperature conditions to directly form, without isolation, a stable dispersion of cerium oxide nanoparticles. Dispersions of these biocompatible cerium oxide nanoparticles exhibit self-life well in excess of one year, and may be used to prevent and/or treat disease or injury, such as oxidative stress related diseases and events. | 12-19-2013 |
20150045450 | NANOPARTICLES OF A METAL AND A NUCLEOBASE - A process for making nanoparticles of biocompatible materials is described, wherein an aqueous reaction mixture comprising a metal ion, a nucleobase, an oxidant, and water, is provided along with temperature conditions to directly form within the reaction mixture, a stable dispersion of nanoparticles. Biocompatible nanoparticles comprised of cerium or iron as the metal ion, and a purine and/or a pyrimidine as the nucleobase, are described. | 02-12-2015 |