| Patent application number | Description | Published |
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| 20080230022 | Rate limiting and balancing control system for dual independent camshaft phasing - A method for controlling dual independent camshaft phasers in an internal combustion engine. The method has three basic steps: a) first, determining if rate balancing between the two phasers is required; b) second, determining the optimal rate balancing commands; and c) third, applying the determined rate balancing commands to the appropriate phaser(s). In determining the rate balancing commands, there are three possible phaser options: the intake phaser requires priority; the exhaust phaser requires priority; or neither phaser requires priority. Lookup tables are stored in the engine controller for each option. When either phaser has priority, the other phaser is actuated after a delay based upon the position error of the priority phaser, generally at a lower phase rate. When neither phaser has priority, both phasers are actuated at a rate consistent with oil-delivery capabilities of the engine. | 09-25-2008 |
| 20080251048 | Method for sensing and clearing throttle plate obstruction - An electronic throttle control system and method for detecting a throttle plate obstruction when the ignition key is on and the engine is either not running or running, and for clearing the throttle plate obstruction before a fault setting is set by the ECU. | 10-16-2008 |
| 20090093951 | Method for determination of Covariance of Indicated Mean Effective Pressure from crankshaft misfire acceleration - A method for determining Covariance of Indicated Mean Effective Pressure (COVIMEP) using already-available crankshaft-based measurements that correlate with COVIMEP. Correlated values of COVIMEP are stored as lookup tables in an Engine Control Module for use in continuously determining COVIMEP during engine operation. COVIMEP thus calculated may be used in known fashion as a real time control algorithm variable for such engine control parameters as fueling rate, spark angle advance, exhaust gas recirculation flow, and camshaft phaser advance angle or other engine parameters. | 04-09-2009 |
| 20090259382 | METHOD FOR LOW AND HIGH IMEP CYLINDER IDENTIFICATION FOR CYLINDER BALANCING - A system and method for identifying the cylinders having the lowest (“weakest”) and highest (“strongest”) Indicated Mean Effective Pressure (IMEP) utilizes engine speed derivative and/or higher order derivative values typically available in an engine control module by virtue of the need to detect misfire. A delta parameter is calculated that is indicative of the difference between the engine speed derivatives and/or higher order derivatives for the “weakest” and the “strongest” cylinders. Control action is then taken to balance the cylinders, based on the delta parameter, by first increasing torque for the “weakest” cylinder, by at least one increasing spark advance, increasing fuel, decreasing dilution (EGR) or slowing decay of fuel control on cold start. Once the weakest cylinder has been balanced, the control action is then directed to increasing torque of the new “weakest” cylinder. | 10-15-2009 |
| 20090276143 | METHOD FOR ESTIMATION OF INDICATED MEAN EFFECTIVE PRESSURE FOR INDIVIDUAL CYLINDERS FROM CRANKSHAFT ACCELERATION - A method for inferring Indicated Mean Effective Pressure as total transient indicated engine torque in an internal combustion engine, comprising the steps of acquiring at least one crankshaft time stamp for use in determining a cylinder-specific engine velocity; calculating an incremental change in engine kinetic energy from the previously fired cylinder (j−1 | 11-05-2009 |
| Patent application number | Description | Published |
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| 20100079855 | MULTI-CLAD OPTICAL FIBERS - Multi-clad optical fibers and fiber amplifiers are disclosed. Various embodiments include multi-clad, large core fiber amplifiers. In various implementations mixing of pump modes is enhanced relative to that obtainable with conventional double-clad fibers. In some embodiments end terminations are provided with increased length of end-cap fiber. In at least one embodiment a multi-clad fiber is provided, with a pump cladding formed by stacking a layer of low index rods in the preform. Various embodiments include a multi-clad fiber amplifier system. The system includes a pump source to pump said fiber amplifier. The system also includes an optical fiber having a core and a cladding, wherein the cladding includes a pump cladding having a corrugated boundary. In various embodiments the pump cladding is formed by rods in a preform, which are disposed to mix the pump modes and/or scatter or reflect pump energy into the core. | 04-01-2010 |
| 20100157418 | GLASS LARGE-CORE OPTICAL FIBERS - Embodiments of optical fiber may include cladding features that include a material (e.g., fluorine-doped silica glass) that may produce a very low relative refractive index difference with respect to cladding material in which the cladding features are disposed. This relative refractive index difference may be characterized by (n | 06-24-2010 |
| 20110069723 | HIGHLY RARE-EARTH-DOPED OPTICAL FIBERS FOR FIBER LASERS AND AMPLIFIERS - Various embodiments described herein comprise a laser and/or an amplifier system including a doped gain fiber having ytterbium ions in a phosphosilicate glass. Various embodiments described herein increase pump absorption to at least about 1000 dB/m-9000 dB/m. The use of these gain fibers provide for increased peak-powers and/or pulse energies. The various embodiments of the doped gain fiber having ytterbium ions in a phosphosilicate glass exhibit reduced photo-darkening levels compared to photo-darkening levels obtainable with equivalent doping levels of an ytterbium doped silica fiber. | 03-24-2011 |
| 20120188632 | GLASS LARGE-CORE OPTICAL FIBERS - Embodiments of optical fiber may include cladding features that include a material (e.g., fluorine-doped silica glass) that may produce a very low relative refractive index difference with respect to cladding material in which the cladding features are disposed. This relative refractive index difference may be characterized by (n | 07-26-2012 |
| 20120257271 | MULTI-CLAD OPTICAL FIBERS - Multi-clad optical fibers and fiber amplifiers are disclosed. Various embodiments include multi-clad, large core fiber amplifiers. In various implementations mixing of pump modes is enhanced relative to that obtainable with conventional double-clad fibers. In some embodiments end terminations are provided with increased length of end-cap fiber. In at least one embodiment a multi-clad fiber is provided, with a pump cladding formed by stacking a layer of low index rods in the preform. Various embodiments include a multi-clad fiber amplifier system. The system includes a pump source to pump said fiber amplifier. The system also includes an optical fiber having a core and a cladding, wherein the cladding includes a pump cladding having a corrugated boundary. In various embodiments the pump cladding is formed by rods in a preform, which are disposed to mix the pump modes and/or scatter or reflect pump energy into the core. | 10-11-2012 |
| 20130301115 | HIGHLY RARE-EARTH-DOPED OPTICAL FIBERS FOR FIBER LASERS AND AMPLIFIERS - Various embodiments described herein comprise a laser and/or an amplifier system including a doped gain fiber having ytterbium ions in a phosphosilicate glass. Various embodiments described herein increase pump absorption to at least about 1000 dB/m-9000 dB/m. The use of these gain fibers provide for increased peak-powers and/or pulse energies. The various embodiments of the doped gain fiber having ytterbium ions in a phosphosilicate glass exhibit reduced photo-darkening levels compared to photo-darkening levels obtainable with equivalent doping levels of an ytterbium doped silica fiber. | 11-14-2013 |
| 20150241628 | GLASS LARGE-CORE OPTICAL FIBERS - Embodiments of optical fiber may include cladding features that include a material (e.g., fluorine-doped silica glass) that may produce a very low relative refractive index difference with respect to cladding material in which the cladding features are disposed. This relative refractive index difference may be characterized by (n | 08-27-2015 |
