Patent application number | Description | Published |
20080264149 | SYSTEM AND METHOD FOR ENGINE SOUND CALIBRATION - A method for calibrating an engine is provided. The engine includes a cylinder for combustion of a fuel. The method includes setting combustion parameters of the engine, detecting a combustion noise during combustion proximate to the cylinder, detecting an engine sound radiated from the engine during combustion, adjusting the combustion parameters and repeating the steps of detecting a combustion noise and detecting an engine sound. The method further includes generating a relationship between the combustion noises and the engine sounds, determining a combustion noise level that correlates to a predefined engine sound threshold from the relationship, adjusting a speed of the engine and a load on the engine and repeating the previous steps to determine a combustion noise level for each engine speed and engine load setting, and calibrating the engine using the combustion noise levels. | 10-30-2008 |
20090000389 | MULTIPLE PATH AIR MASS FLOW SENSOR ASSEMBLY - A multiple path air mass flow sensor assembly includes an inlet duct which is divided into at least two separate ducts. A first duct has an air mass flow sensor disposed in conventional fashion therein. A second duct includes a damper or valve which may be selectively, partially or fully opened. At low air flow rates, the damper is closed forcing all air through the first duct. As engine speed increases and the air mass flow rate increases, the damper opens, either fully at a predetermined flow rate or proportionally over a predetermined flow rate range, to allow a larger volume of air through the inlet duct. The signal from the air mass flow sensor is adjusted by the engine controller to compensate for the (bypass) air flowing through the second duct. | 01-01-2009 |
20090150042 | VEHICLE SPEED DEPENDANT CALIBRATION TRIM FOR IMPROVED FUEL ECONOMY - A control system and method for improving vehicle fuel economy is provided. A base timing module generates a base timing signal. A trim module calculates a vehicle speed compensation factor and generates a timing trim signal based on the vehicle speed compensation factor. A vehicle speed trim module adjusts a calibration parameter (such as engine timing for example) based on the base timing signal and the timing trim signal. According to some implementations, the trim module includes a base trim module and a vehicle speed compensation module. The base trim module generates a base trim signal. The vehicle speed compensation module generates the vehicle speed compensation factor. The base trim signal can be based on a speed of the engine. The base trim signal can further be based on a quantity of fuel delivered to the engine. | 06-11-2009 |
20090249782 | MODULAR EXHAUST GAS RECIRCULATION COOLING FOR INTERNAL COMBUSTION ENGINES - An EGR system compensates for differing EGR flows and/or exhaust temperatures and can maintain the cooler exit temperature above the critical temperature, thereby reducing the possibility of EGR cooler fouling. A plurality of exhaust gas recirculation cooler modules is disposed between an exhaust gas passage and an air passage. The cooler modules receive exhaust gas from the exhaust gas passage and supply the received exhaust gas to the air passage for recirculation into an intake manifold. Each of the cooler modules includes a cooler portion, a bypass portion, and a flow control device. The cooler portion and the bypass portion are arranged such that fluid flowing through the cooler portion and the bypass portion flows therethrough without flowing through the other of the cooler portion and the bypass portion. The cooler portion reduces a temperature of the fluid flowing through the cooler portion. | 10-08-2009 |
20100094525 | VEHICLE SPEED DEPENDANT CALIBRATION TRIM OR USER-SELECTABLE CALBRATABLE TRIM FOR IMPROVED FUEL ECONOMY - A control system and method for improving vehicle fuel economy is provided. A base timing module generates a base timing signal. A trim module generates a timing trim signal based on a calibratable compensation factor. A vehicle speed trim module adjusts a calibration parameter (such as engine timing for example) based on the base timing signal and the timing trim signal. According to some implementations, the trim module includes a base trim module and a vehicle speed compensation module and a calibratable compensation factor module. The vehicle speed compensation module generates a vehicle speed compensation factor. The base trim module generates a base trim signal based on the vehicle speed compensation factor or the calibratable compensation factor. The base trim signal can be based on a speed of the engine. The base trim signal can further be based on a quantity of fuel delivered to the engine. | 04-15-2010 |
Patent application number | Description | Published |
20110271932 | Combustion chamber constructions for opposed-piston engines - A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity. | 11-10-2011 |
20110289916 | EGR constructions for opposed-piston engines - A two-stroke, opposed-piston engine with one or more ported cylinders and uniflow scavenging includes an exhaust gas recirculation (EGR) construction that provides a portion of the exhaust gasses produced by the engine for mixture with charge air to control the production of NOx during combustion. | 12-01-2011 |
20120073541 | Fuel injection spray patterns for opposed-piston engines - A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity. Opposing spray patterns of fuel are injected into the combustion chamber. In some aspects, the opposing spray patterns are injected along a major axis of the combustion chamber. | 03-29-2012 |
20120080007 | Fuel injector support constructions for direct injection opposed-piston engines - An opposed-piston internal combustion engine with one or more ported cylinders and uniflow scavenging includes fuel injectors supported at compound angles with respect to the cylinders in order to directly inject spray patterns of fuel in opposing directions through the side walls of the cylinders. | 04-05-2012 |
20120125298 | Two stroke opposed-piston engines with compression release for engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with a decompression port including a valve and a passage with an opening through the cylinder wall that is located between the cylinder's intake and exhaust ports. The decompression port enables release of compressed air from the cylinder after the intake and exhaust ports are closed. The valve is opened to permit compressed air to be released from the cylinder through the passage, and closed to retain compressed air in the cylinder. Engine braking is supported by release of compressed air through the decompression port into an exhaust channel when the pistons are at or near top dead center positions as the cycle transitions from the intake/compression stroke to the power/exhaust stroke. Compression release from the cylinder after intake and exhaust port closure can also support other engine operations. | 05-24-2012 |
20130104848 | Fuel Injection Strategies in Opposed-Piston Engines with Multiple Fuel Injectors | 05-02-2013 |
20130213342 | Piston Crown Bowls Defining Combustion Chamber Constructions In Opposed-Piston Engines - A combustion chamber for an opposed-piston engine is defined between a pair of pistons disposed for opposing reciprocal movement in a cylinder. The combustion chamber is formed between crowns of the pistons and has a radius that decreases from the longitudinal axis of the cylinder. Each crown includes a periphery, a bowl within the periphery defining a concave surface with a first portion curving inwardly toward the interior of the piston and a second portion curving outwardly from the interior, and a convex surface within the periphery curving outwardly and meeting the second portion of the concave surface to form a ridge. Each ridge has a height that decreases with the distance from a longitudinal axis. | 08-22-2013 |
20140014063 | Swirl-Conserving Combustion Chamber Construction For Opposed-Piston Engines - A combustion chamber construction for opposed-piston engines includes an elongated, bilaterally symmetrical shape referenced to a major axis and a pair of injection ports located on the major axis when the pistons are near respective top center positions. The combustion chamber is defined between a bowl in the end surface of a first piston of a pair of pistons and mirrored ridges protruding from the end surface of a second piston of the pair. Each ridge includes a central portion that curves toward a periphery of the end surface of the second piston and which transitions to flanking portions that curve away from the periphery. The ridge configuration imparts a substantially spherical configuration to a central portion of the combustion chamber where swirling motion of charge air is conserved. | 01-16-2014 |
20140026563 | EGR Constructions for Opposed-Piston Engines - A two-stroke, opposed-piston engine with one or more ported cylinders and uniflow scavenging includes an exhaust gas recirculation (EGR) construction that provides a portion of the exhaust gasses produced by the engine for mixture with charge air to control the production of NOx during combustion. | 01-30-2014 |
20140083396 | Combustion Chamber Constructions for Opposed-Piston Engines - An opposed-piston engine includes a ported cylinder and a pair of pistons disposed to reciprocate in the bore of the cylinder. A combustion chamber is defined by opposing shaped piston end surfaces as the pistons approach respective top dead center (TDC) locations in the bore. At the end of scavenging, the shaped end surfaces of the pistons interact with swirl to produce turbulence in the charge air motion in the combustion chamber; the additional bulk motions include tumble. Fuel is injected into the turbulent charge air motion along a major axis, of the combustion chamber. | 03-27-2014 |
20140299109 | Dual Crankshaft, Opposed-Piston Engines With Variable Crank Phasing - The timing or phasing of port openings and closings during operation of an opposed-piston engine is varied in response to changing engine speeds and loads by changing crankshaft phasing. | 10-09-2014 |
20140373814 | Air Handling Control for Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 12-25-2014 |
20150013649 | Combustion Chamber Constructions For Opposed-Piston Engines - A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity. | 01-15-2015 |
20150033736 | Exhaust Management Strategies For Opposed-Piston, Two-Stroke Engines - Exhaust temperature management strategies for an opposed-piston, two-stroke engine with EGR are based on control of a ratio of the mass of fresh air and external EGR delivered to a cylinder to the mass of the trapped charge (density of the delivered charge multiplied by the trapped volume at port closing). | 02-05-2015 |
20150128907 | Cold-Start Strategies for Opposed-Piston Engines - A strategy to cold-start an opposed-piston engine includes, before injecting fuel, preventing air flow through the engine while cranking the engine to heat air retained in the engine, followed by controlling mass air flow through and fuel injection into a cylinder of the engine according to cold-start schedules so as to create and preserve heat for stable engine firing and transition to an idling state of operation. | 05-14-2015 |
20150285127 | FUEL INJECTION WITH SWIRL SPRAY PATTERNS IN OPPOSED-PISTON ENGINES - In a fuel injection spray pattern for an opposed piston engine, the individual spray plumes have both radial and tangential components with respect to an injection axis ( | 10-08-2015 |
20150337727 | Air Handling Constructions for Opposed-Piston Engines - An opposed-piston engine has a cylinder block with a plurality of cylinders arranged inline, with each cylinder including an intake port longitudinally separated from an exhaust port. The engine is equipped with an air handling system that includes intake and exhaust chambers inside the cylinder block. All of the cylinder intake ports are contained in the intake chamber to receive charge air therein. The intake chamber includes elongated air inlets opening through opposing sides of the cylinder block. The exhaust chamber includes at least one exhaust outlet opening through a side of the cylinder block; all of the cylinder exhaust ports are contained in the exhaust chamber to discharge exhaust thereinto. | 11-26-2015 |
20150337728 | Open Intake and Exhaust Chamber Constructions for an Air Handling System of an Opposed-Piston Engine - An opposed-piston engine has a cylinder block with a plurality of cylinders arranged inline, with each cylinder including an intake port longitudinally separated from an exhaust port. The engine's air handling system includes open intake and exhaust chambers in the cylinder block. The open chamber constructions eliminate the need for multi-pipe manifolds and smooth the flow of charge air. | 11-26-2015 |
Patent application number | Description | Published |
20080247072 | MAGNETIC TUNNEL JUNCTION MAGNETIC MEMORY - This magnetic memory with a thermally-assisted write, every storage cell of which consists of at least one magnetic tunnel junction, said tunnel junction comprising at least: | 10-09-2008 |
20090161424 | THERMALLY ASSISTED MAGNETIC WRITE MEMORY - A thermally assisted magnetic write memory including of memory points or memory cells, each of which includes a double magnetic tunnel junction separated from one another by a layer made from an antiferromagnetic material, and whereof the stacking order of the layers constituting them is reversed with regard to one another. Each of the magnetic tunnel junctions includes a reference layer, a storage layer, an insulating layer inserted between the reference and storage layers, constituting the tunnel barrier of the magnetic tunnel junction concerned. The blocking temperature of the layer is lower than the blocking temperature of the reference layer of the corresponding magnetic tunnel junction. The product RA resistance x area of the two tunnel barriers is different. Each memory point a way to heat the storage layers to a temperature above the blocking temperature of the layers. | 06-25-2009 |
20110151589 | PRODUCTION OF A DEVICE COMPRISING MAGNETIC STRUCTURES FORMED ON ONE AND THE SAME SUBSTRATE AND HAVING RESPECTIVE DIFFERENT MAGNETIZATION ORIENTATIONS - The invention relates to a method for producing a device comprising magnetic blocks magnetized in different directions, comprising steps of:
| 06-23-2011 |
20110266642 | METHOD FOR PRODUCING A MAGNETIC TUNNEL JUNCTION AND MAGNETIC TUNNEL JUNCTION THUS OBTAINED - According to this method for producing a magnetic tunnel junction, a film of a dielectric material capable of acting as a tunnel barrier is deposited between two nanocrystalline or amorphous magnetic films. The dielectric material constituting the tunnel barrier consists of an at least partially crystalline perovskite, and said material is deposited by ion beam sputtering in a vacuum chamber. | 11-03-2011 |
20110304325 | MAGNETIC FIELD SENSOR WITH SUSPENDED STRESS GAUGE - A magnetic field sensor including a body including a magnetic mechanism capable of forming a torque applied on the body by action of an external magnetic field to be detected; a connector, separated from the body, mechanically connecting the body to an inlay portion of the sensor by at least one pivot link having an axis perpendicular to the direction of the magnetic field to be detected; a detector detecting stress applied by the body by action of the torque, separated from the connector and including at least one suspended stress gauge including a first part mechanically connected to the inlay portion, a second part mechanically connected to the body, and a third part provided between the first and second parts and suspended between the inlay portion and the body. | 12-15-2011 |
Patent application number | Description | Published |
20100179795 | COMPUTER DEVICE FOR SIMULATING A SET OF OBJECTS IN INTERACTION AND CORRESPONDING METHOD - Computer device for simulating a set of objects in interaction and corresponding method. A computer device for simulating a set of objects in interaction comprises: a memory ( | 07-15-2010 |
20150134310 | Method for Simulating a Set of Elements, and Associated Computer Program - Method for simulating a system of elements, according to which the behaviour of said elements is determined on the basis of a Hamiltonian H of the system of elements, such as (formula I) where p is a vector indicating the moments of the elements. q is a vector indicating the positions of the elements, M | 05-14-2015 |
20150254378 | Method for Simulating an Assembly of Elements - The invention relates to a method for simulating a system of elements represented by a tree comprising leaf nodes each representing an element, and inner nodes including a root node R, on the basis of a Hamiltonian (formula I), p being the vector of momentum, q being the vector of the positions of the elements, and V being the potential energy of the system: when predetermined conditions are verified, the same translational movement is imparted on at least the descending elements of a given node of the tree, by defining the matrix M | 09-10-2015 |