Patent application number | Description | Published |
20140102416 | FUEL MANAGEMENT SYSTEM - A fuel management system for an engine having a common fuel rail. The fuel management system includes means to regulate air supply and fuel supply. A control unit is provided to determine a maximum allowable fuel mass flow supplied from the fuel rail, based on the air supply and a predetermined air-fuel ratio for the operating parameters of the engine. The control unit calculates an allowable upper limit of rail pressure based on the determined maximum allowable fuel mass flow. The control unit regulates the fuel supply based on the determined allowable upper limit of the rail pressure. | 04-17-2014 |
20140121941 | Intake Pressure Control In Internal Combustion Engine - Controlling intake pressure in an internal combustion engine includes calculating a proportional control term based on a difference between actual and desired intake pressure, determining choke and waste gate position values responsive to the proportional control term, and commanding a change in position of the choke or waste gate responsive to the corresponding position value to adjust actual intake pressure toward desired intake pressure. Related apparatus and control logic is also disclosed. | 05-01-2014 |
20140136080 | Control Strategy For Dual Gaseous And Liquid Fuel Internal Combustion Engine - A control system for a dual gaseous and liquid fuel engine includes an electronic controller configured to receive data from a plurality of sensing mechanisms indicative of an error in a plurality of different engine operating parameters. The electronic controller is further configured to determine a highest priority one of the errors, and limit substitution of the gaseous fuel responsive to a normalized value thereof. | 05-15-2014 |
20140290215 | EMISSIONS CONTROL FOR ENGINE SYSTEM - A method for controlling emissions in an engine system including an internal combustion engine and a catalytic converter with oxygen storage capacity. The method includes determining a real time oxygen storage level of the three-way catalytic converter based on a real time exhaust gas flow rate and a real time measured upstream oxygen quantity with respect to the catalytic converter. Further, maintaining an optimal oxygen storage level of the three-way catalytic converter for different types of fuel used in the internal combustion engine. | 10-02-2014 |
20140290614 | ENGINE CONTROL SYSTEM AND METHOD - An engine system includes a fuel supply unit configured to supply fuel into a combustion chamber. The engine system includes a fuel supply unit to regulate the supply of fuel into an inlet port via a fuel rail and an air supply unit configured to supply compressed air into the combustion chamber. A control system is configured to receive operating conditions of the engine system. Further, the control system includes a detector component configured to generate a control signal indicative of a start-up condition of an engine system. A switching component of the controller receives the control signal indicative of the start-up condition of the engine system from the detector component and further transmits a fuel supply control signal to the fuel valve based on an air-fuel ratio error signal, and transmit an air supply control signal to the choke valve based on an engine speed error signal. | 10-02-2014 |
20140290623 | INJECTION TIMING MANAGEMENT IN DUAL FUEL ENGINE SYSTEM - A fuel injection timing management system for a dual fuel engine is configured to determine a first diesel injection timing corresponding to a first mode of operation of the engine system and a second diesel injection timing corresponding to a second mode of operation. Further, determine a direction of change in a mode of operation of the engine system, and selectively perform a change in the diesel injection timing from the first diesel injection timing to the second diesel injection timing at a first rate of transition or a second rate of transition, based on the direction of change in a mode of operation of the engine system. | 10-02-2014 |
20140366839 | Transient Event Fuel Apportionment for Multi Fuel Engine System - A method for controlling fuel flow in a multi fuel engine during transient events is disclosed. A specified fuel substitution ratio may be used for apportioning multiple fuels available for providing power to the multi fuel engine to provide input power for operating the engine at a desired engine speed. When a transient event occurs, such as a significant change in the desired engine speed or the load on the engine, a transient event fuel substitution ratio may used instead of the specified fuel substitution ratio to achieve a desired engine response to the event. The transient event may be detected based on, for example, the change in input power or engine speed caused by the event. The transient event fuel substitution ratio may be specified, or may be calculated based on a knock limit air fuel ratio or other factors. | 12-18-2014 |
20140366840 | Fuel Apportionment for Multi Fuel Engine System - A method for controlling fuel flow to apportion a plurality of available fuels in a multi fuel engine is disclosed. An input power for operating the multi fuel engine at a desired engine speed is determined at a PI controller, and a fuel flow rate for each of a plurality of available fuels is determined at a fuel apportionment module based on the required input power and a specified fuel substitution ratio for apportioning the plurality of fuels to the multi fuel engine. Fuel flow commands for each of the plurality of fuels are output to corresponding actuators of fluid flow control devices for the fuels to cause the cause the fluid flow control devices to provide the corresponding fuels to the multi fuel engine at the corresponding fuel flow rate. | 12-18-2014 |
20150241306 | DETECTING MISFIRING IN A GASEOUS FUEL OPERATED INTERNAL COMBUSTION ENGINE - A method of detecting an incomplete combustion, such as a misfire, in an internal combustion engine operating at least partly on a gaseous fuel, includes: receiving pressure data corresponding to a temporal development of a cylinder pressure during a combustion event within a combustion cycle; deriving from the pressure data a combustion energy value of the combustion; determining that the derived combustion energy value is beyond a predetermined combustion-cycle specific combustion threshold level; and associating the combustion event with an incomplete combustion in the combustion cycle. | 08-27-2015 |
20150252737 | ELECTRICAL MONITORING OF GASEOUS FUEL ADMISSION VALVES - A method of evaluating operability of a gaseous fuel admission valve of an internal combustion engine is disclosed. The method includes operating the internal combustion engine on gaseous fuel by repeatedly actuating the gaseous fuel admission valve. The method further includes measuring a sequence of temporal developments of an electrical operation parameter respectively associated with an actuation of the gaseous fuel admission valve. The sequence includes a first temporal development to be evaluated and a plurality of temporal developments preceding the first temporal development. The method also includes evaluating operability of the gaseous fuel admission valve based on the first temporal development of the measured sequence and at least one of the plurality of preceding temporal developments of the measured sequence. | 09-10-2015 |
20150252738 | GAS OR DUAL FUEL ENGINE - A method of operating a gas or dual fuel engine having a plurality of cylinders, includes monitoring a characteristic of each of the plurality of cylinders during operation of the gas or dual fuel engine. The method also includes detecting a pre-ignition condition associated with one or more cylinders of the plurality of cylinders based on the monitored characteristic. The method further includes reducing fuel supply to the one or more cylinders having the pre-ignition condition. The fuel supply to remaining cylinders of the plurality of cylinders is increased, to maintain a constant power output of the gas or dual fuel engine. The method further includes adjusting an amount of air supplied to each of the plurality of cylinders based on the increased amount of fuel supplied to the remaining cylinders, to maintain an air-to-fuel ratio within a desired range. | 09-10-2015 |
20150300281 | Intake Pressure Control Strategy In Gaseous Fuel Internal Combustion Engine - Controlling intake pressure in a gaseous fuel internal combustion engine includes calculating a control term in an intake pressure control loop based on a pressure error, and adjusting a throttle valve and a second valve responsive to the control term in first and second control loop cycles. The second valve is within a return conduit returning compressed gases from a location downstream a compressor to a location upstream. A pressure of gaseous fuel and air within the intake conduit is changed via the adjustments so as to reduce the pressure error. | 10-22-2015 |
20150345408 | FUEL APPORTIONMENT FOR MULTI FUEL ENGINE SYSTEM - A method for controlling fuel flow in a multi fuel engine is disclosed. An input power for operating the multi fuel engine at a desired engine speed is determined and a fuel flow rate based on the input power, one or more fuel properties and a specified fuel substitution ratio for apportioning the plurality of fuels is determined. Also, a correction factor for the fuel flow rate based on a desired charge density, wherein the desired charge density is based at least on a relationship between an engine load and charge density is determined and a corrected fuel flow rate, based on the determined correction factor, is output to a corresponding actuator of a fluid flow control device for the one of the fuels to cause the corresponding actuator to provide the one of the plurality of fuels at the corrected fuel flow rate. | 12-03-2015 |
20150369716 | System and Method for Determining the Specific Gravity of a Gaseous Fuel - The disclosure relates to a system and method for determining the specific gravity of a fuel used in a dual fuel engine. The system includes a fuel rail, at least one sensor, and a processor. The method includes sensing and recording, with the at least one sensor and the at least one memory, a first pressure profile of a first fuel in the fuel rail and a second pressure profile of a second fuel in the fuel rail. The first fuel has a known specific gravity and the second fuel has an unknown specific gravity. The method further includes calculating the second specific gravity of the second fuel, with a processor, based on the first pressure profile, the second pressure profile, and the first specific gravity. | 12-24-2015 |
20160084179 | CONTROLLING AN INTERNAL COMBUSTION ENGINE OPERATED ON GASEOUS FUEL - A method for controlling an internal combustion engine operating on at least partly gaseous fuel is disclosed. The method may include providing a desired burn rate profile corresponding to a desired operation of the internal combustion engine. The method may further include selecting first operating parameters such that an operation of the internal combustion engine with a first gas composition produces a first burn rate profile that corresponds to the desired burn rate profile. The method may also include operating the internal combustion engine with the first operating parameters using a second gas composition. The method may include determining that the second burn rate profile differs from the desired burn rate profile. In addition, the method may include adjusting an operating parameter from among the first operating parameters of the internal combustion engine to approach the desired burn rate profile. | 03-24-2016 |
Patent application number | Description | Published |
20140095694 | SYSTEMS AND METHODS FOR INSTALLING, MANAGING, AND PROVISIONING APPLICATIONS - Systems and methods are disclosed for provisioning resources for an application according to an application manifest. The resources may include database, network, and processing resources. The application manifest may be organized as a manifest tree with provisioned resources having their own application manifests for provisioning sub-resources. The application manifest may also define provisioning and de-provisioning of the application in response to loading of the application. Root cause analysis may be performed in accordance with the manifest tree. Also disclosed are systems and methods for rolling out an upgrade across a node cluster. Systems and methods are disclosed for routing traffic to different workflow paths in order to implement an overloaded path and evaluate performance of the overloaded path. | 04-03-2014 |
20140096125 | SYSTEMS AND METHODS FOR INSTALLING, MANAGING, AND PROVISIONING APPLICATIONS - Systems and methods are disclosed for provisioning resources for an application according to an application manifest. The resources may include database, network, and processing resources. The application manifest may be organized as a manifest tree with provisioned resources having their own application manifests for provisioning sub-resources. The application manifest may also define provisioning and de-provisioning of the application in response to loading of the application. Root cause analysis may be performed in accordance with the manifest tree. Also disclosed are systems and methods for rolling out an upgrade across a node cluster. Systems and methods are disclosed for routing traffic to different workflow paths in order to implement an overloaded path and evaluate performance of the overloaded path. | 04-03-2014 |
20140096127 | SYSTEMS AND METHODS FOR INSTALLING, MANAGING, AND PROVISIONING APPLICATIONS - Systems and methods are disclosed for provisioning resources for an application according to an application manifest. The resources may include database, network, and processing resources. The application manifest may be organized as a manifest tree with provisioned resources having their own application manifests for provisioning sub-resources. The application manifest may also define provisioning and de-provisioning of the application in response to loading of the application. Root cause analysis may be performed in accordance with the manifest tree. Also disclosed are systems and methods for rolling out an upgrade across a node cluster. Systems and methods are disclosed for routing traffic to different workflow paths in order to implement an overloaded path and evaluate performance of the overloaded path. | 04-03-2014 |
20140096129 | SYSTEMS AND METHODS FOR INSTALLING, MANAGING, AND PROVISIONING APPLICATIONS - Systems and methods are disclosed for provisioning resources for an application according to an application manifest. The resources may include database, network, and processing resources. The application manifest may be organized as a manifest tree with provisioned resources having their own application manifests for provisioning sub-resources. The application manifest may also define provisioning and de-provisioning of the application in response to loading of the application. Root cause analysis may be performed in accordance with the manifest tree. Also disclosed are systems and methods for rolling out an upgrade across a node cluster. Systems and methods are disclosed for routing traffic to different workflow paths in order to implement an overloaded path and evaluate performance of the overloaded path. | 04-03-2014 |
Patent application number | Description | Published |
20120297888 | Wireless Passive Radio-Frequency Strain And Displacement Sensors - Wireless strain and displacement sensors wirelessly monitor structural health and integrity, and are made by printing inductor-interdigital capacitor sensing circuits on a variety of substrates, including ceramic substrates, with thermally processable conductive inks. Sensors of the invention can be employed to detect strain and displacement of civil structures, such as bridges and buildings. The sensors include sensing elements that are mounted or printed on stiff, inflexible substrates, which prevent the sensing elements from bending, stretching, or otherwise warping when the sensor is strained. An interlayer between the sensing elements allows the sensing elements to move with respect to each other during application of strain. Thus, strain causes the sensing elements to move but not to deform, causing changes in sensor resonance that can be detected through wireless radio-frequency interrogation. Because the sensing elements do not change shape when under strain, the sensor can undergo millions of measurement cycles before breaking. | 11-29-2012 |
20140182214 | Abrasive Articles and Method of Forming Same - An abrasive article including a bonded abrasive body having a bond material made of a vitrified material, abrasive particles comprising a first type of superabrasive material contained in the bond material, a porosity of at least about 50 vol % of the total volume of the bonded abrasive body, and a ΔCTE of not greater than about 5.5 ppm/° C., wherein ΔCTE is defined as a difference between a CTE of the bond material and a CTE of the abrasive particles. | 07-03-2014 |
20140187129 | ABRASIVE ARTICLE HAVING A CORE OF AN ORGANIC MATERIAL AND A BONDED ABRASIVE BODY COMPRISING A BOND MATERIAL - An abrasive article includes a core comprising an organic material and a first bonded abrasive body integrally bonded directly to the core, wherein the bonded abrasive body includes a bond material, and abrasive particles contained within the bond material. | 07-03-2014 |
20140323020 | GRINDING AND POLISHING TOOL - A grinding tool includes a shank having an axis, and at least two abrasive portions mounted directly to and in contact with the shank without a hub therebetween. Each of the abrasive portions has a substantially identical profile formed therein. | 10-30-2014 |
Patent application number | Description | Published |
20150112999 | SYSTEM AND METHOD FOR IMPLEMENTING A SCALABLE DATA STORAGE SERVICE - A system that implements a scalable data storage service may maintain tables in a non-relational data store on behalf of clients. The system may provide a Web services interface through which service requests are received, and an API usable to request that a table be created, deleted, or described; that an item be stored, retrieved, deleted, or its attributes modified; or that a table be queried (or scanned) with filtered items and/or their attributes returned. An asynchronous workflow may be invoked to create or delete a table. Items stored in tables may be partitioned and indexed using a simple or composite primary key. The system may not impose pre-defined limits on table size, and may employ a flexible schema. The service may provide a best-effort or committed throughput model. The system may automatically scale and/or re-partition tables in response to detecting workload changes, node failures, or other conditions or anomalies. | 04-23-2015 |
20150370872 | EMBEDDABLE CLOUD ANALYTICS - An analytics module may be embedded into an application developed, published, or used by an entity in addition to the owner of the data under analysis. An access token may be submitted by the analytics module to a provider of hosted services. The access token may correspond to an n-dimensional cube containing data at a level of granularity permitted to the application. The access token may incorporate additional policies controlling access to the corresponding n-dimensional cube. | 12-24-2015 |
20150370881 | DYNAMIC N-DIMENSIONAL CUBES FOR HOSTED ANALYTICS - An online analytical processing system may comprise an n-dimensional cube structured using slice-based partitioning in which each slice comprises one or more hierarchies of data points. A region of a hierarchy may be classified according to computational demands associated with the region. A scaling or replication mechanism may be applied to the region based on the computational demands associated with that region. | 12-24-2015 |
20150370882 | USE OF DEPENDENCY GRAPHS TO DYNAMICALLY UPDATE N-DIMENSIONAL CUBES - An online analytical processing system may comprise an n-dimensional cube structured using slice-based partitioning in which each slice comprises data points corresponding to a set of dimension values fixed across the slice and a set of dimension values allowed to vary. Slices may be partitioned and replicated across computing nodes. Views of the n-dimensional cube may be partially materialized by determining dependencies between slices. A central data dictionary may maintain information about slices and slice dependencies. Dimensions may be added by adding a new slice without requiring immediate recomputation of existing data points. | 12-24-2015 |
20150370883 | DATA INTEREST ESTIMATION FOR N-DIMENSIONAL CUBE COMPUTATIONS - An online analytical processing system may comprise an n-dimensional cube partitioned into slices, in which each slice may represent data points at the intersections of fixed and variable dimensions. Computation of data points within a slice may be deferred. A dependency graph may be initially constructed, in which the dependency graph is utilized in a subsequent computation. Calculation of data points may be prioritized based on information indicative of a chance that the data points will be accessed. | 12-24-2015 |
20160004731 | SELF-SERVICE CONFIGURATION FOR DATA ENVIRONMENT - The values of various operating and/or configuration parameters of a data environment are managed using a set of self-service Web services and interfaces of a separate control environment. A customer can submit a Web services call into an externally-facing application programming interface (API) or other such externally-facing interface of the control environment. The API receiving the call, as well as information extracted from the call, can be used to determine appropriate adjustments to be performed in the data environment. A workflow can be instantiated that includes tasks used to validate and/or apply the adjustments to the target resources, such as databases, data instances, data stores, instance classes, etc. Various real-time functions such as monitoring and auto-scaling also can be performed via the control plane. | 01-07-2016 |