Determining Likely Cause Of Fault Patents (Class 701/31.8)
  • Patent number: 10176649
    Abstract: Disclosed is an electronic apparatus for assisting an aircraft pilot. The aircraft includes avionics equipment implementing operational capacities and a monitoring system configured to determine monitoring information from operational capacities and operating parameters of the avionics equipment. The assistance apparatus includes in an acquisition module configured to acquire the monitoring information and an anomaly detection module configured to detect at least one anomaly from among a breakdown of an avionics equipment and a failure of an operational capacity, from monitoring information and anomaly detection rules contained in a predefined database. The assistance apparatus includes an inference module configured to identify, for each anomaly, one or several causes that may have caused the anomaly, based on relationships between breakdowns and failures, the relationships being contained in the database.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: January 8, 2019
    Assignee: THALES
    Inventors: Christian Sannino, Jonathan Sprauel
  • Patent number: 10078542
    Abstract: A solution is proposed for managing a plurality of computing machines. A corresponding method comprises causing each computing machine of at least part of the computing machines to execute a management activity on the computing machine; receiving a corresponding result of the execution of the management activity on each computing machine; determining a success fingerprint according to one or more characteristics of each of at least part of one or more wherein the corresponding result is indicative of a success of the execution of the management activity thereon; calculating a similarity index for each of one or more failure ones of the computing machines wherein the corresponding result is indicative of a failure of the execution of the management activity thereon; and prioritizing the computing machines which failed to accept a policy according to the corresponding similarity indexes.
    Type: Grant
    Filed: November 16, 2015
    Date of Patent: September 18, 2018
    Assignee: International Business Machines Corporation
    Inventors: Michele Crudele, Rosario Gangemi, Antonio Perrone
  • Patent number: 9008891
    Abstract: A method of rationalizing a plurality of temperature sensors associated with a plurality of electrical systems of a vehicle includes: maintaining each of the respective electrical systems of the vehicle in a non-operational state for a predetermined period of time; receiving a temperature reading from each of the plurality of temperature sensors following the predetermined period of time; computing a master-reference temperature value from the plurality of received temperature readings; determining a difference between each of the respectively received temperature readings and the computed master-reference temperature value; comparing each determined difference to a threshold; and providing an indicator if one or more of the determined differences exceeds the threshold.
    Type: Grant
    Filed: October 3, 2012
    Date of Patent: April 14, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Kevin P Houle, Andrew M. Zettel, Kathryn E Mulligan, Paul A Adam
  • Patent number: 8977423
    Abstract: Methods and systems for providing. In an example, the computing device may be configured to receive vehicle information including identification information of a vehicle and/or information describing condition of the vehicle. The computing device also may be configured to match the vehicle information to content of a vehicle repair database so as to identify repair information relating to the vehicle. The computing device further may be configured to receive geographic information identifying a geographic location relating to the vehicle. The computing device also may be configured to provide, to a communication network, a subset of the identified repair information based on the geographic information. The service advisor may be able to access the subset of the identified repair information on a display device coupled to the computing device.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: March 10, 2015
    Assignee: Snap-on Incorporated
    Inventors: Patrick S. Merg, R. Steven Brozovich
  • Patent number: 8838327
    Abstract: A method for analyzing faults present on a platform includes the following steps: (a) providing a table of correspondence between a plurality of observable symptoms on the platform (10) and the fault modes capable of creating each observable symptom; (b) measuring the observable symptoms present on the platform (10); (c) establishing at least one family of faults, including determining a list of fault modes capable of creating, alone or in combination, all of the selected present symptoms, placing each given fault mode of the group in a fault family, and grouping all of the fault modes capable of creating at least one selected present symptom shared with the given fault mode together in the same fault family as the given fault mode. The method is applicable to fault analyses on aircrafts.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: September 16, 2014
    Assignee: Dassault Aviation
    Inventors: Laurent Turban, Walter Turco
  • Publication number: 20140214263
    Abstract: Assistance in the maintenance of an aircraft system comprising a set of elements, means for detecting faults of elements or of functions implemented by elements and means for establishing a first level of diagnostic. After having detected a fault, a plurality of elements are identified, each element of that plurality of elements being liable to be at the origin of the detected fault, alone or in combination with at least one other element of that plurality of elements. A probability that the element considered is at the origin of said detected fault is then determined for each element of that plurality of elements.
    Type: Application
    Filed: January 23, 2014
    Publication date: July 31, 2014
    Inventors: Patrice Boucher, Nicolas Wacyk
  • Patent number: 8793048
    Abstract: Apparatus, and an associated method, for analyzing operation of a multiple-state device, such as a vehicular automatic transmission under multiple-fault occurrence. An identifier identifies all possible path sequences of an initial state responsive to occurrence of all possible faults and all possible remediation actions. The paths are identified for a multiple-fault occurrence of two or more faults. For each of the possible paths, a hazard level is assigned, and the hazard levels are sorted to obtain preferred path sequences. Analysis of the possible paths and their associated hazard levels is made, and a state control scheme is formulated.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: July 29, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Thomas E. Mathews
  • Patent number: 8751101
    Abstract: A method of diagnosing a cooling subsystem of an engine system in response a parameter extracted from dynamic hydraulic pressure sensed in the cooling subsystem, and products and systems using same.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: June 10, 2014
    Assignee: BorgWarner Inc.
    Inventors: Olaf Weber, Wolfgang Wenzel
  • Patent number: 8712604
    Abstract: A method and a device for accessing the documentation of an aircraft according to alarms generated therein, where the documentation includes at least one document that is modifiable independently of the manufacturer of the aircraft. After having received at least one indication relating to at least one alarm generated by the avionics of the aircraft, at least one datum relating to the at least one alarm, including a link to at least one element of the documentation, is extracted and displayed.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: April 29, 2014
    Assignees: Airbus S.A.S., AIRBUS Operations S.A.S.
    Inventors: Pierre Campagne, Jerome Treanton, Xavier Geay, Laval Louis Chan Kam Fai, Christophe Jotz, Thierry Paya-Arnaud, Jerome Pouyfaucon
  • Patent number: 8676432
    Abstract: A vehicle fault diagnosis and prognosis system includes a computing platform configured to receive a classifier from a remote server, the computing platform tangibly embodying computer-executable instructions for evaluating data sequences received from a vehicle control network and applying the classifier to the data sequences, wherein the classifier is configured to determine if the data sequences define a pattern that is associated with a particular fault.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: March 18, 2014
    Assignee: GM Global Technology Operations LLC
    Inventors: Debprakash Patnaik, Pulak Bandyopadhyay, Steven W. Holland, Kootaala P. Unnikrishnan, George Paul Montgomery, Jr.
  • Patent number: 8650068
    Abstract: A method of determining services pricing, the method comprising: a server receiving vehicle identification information from a user via a network connection, wherein the vehicle identification information indicates a vehicle type; the server receiving service type information from the user via the network connection, wherein the service type information indicates a service type; the server determining an estimate range based on the vehicle identification information and the service type information, wherein the estimate range comprises a minimum value and maximum value for the indicated vehicle type and service type, and wherein determining the estimate range comprises determining a labor estimate and a parts estimate; and the server providing the estimate range to the user via the network connection.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: February 11, 2014
    Assignee: RepairPal, Inc.
    Inventors: David Esser, Aaron Tavistock, Matthew Ellinwood, David Sturtz
  • Patent number: 8600627
    Abstract: The invention relates to a monitoring device and to a method for monitoring the function of the components of an agricultural implement, with a vibration sensor for providing signal values containing information on mechanical vibrations generated by moving components of the implement, an operating state detecting device for providing a signal containing information on the operating state of components of the implement, and a calculating device for generating state information on the basis of the state of the components of the implement. The calculating device can be operated to divide the signal values of the vibration sensor on the basis of the corresponding signals of the operating state detecting device into different classes, which correspond to different combinations of the operating states of the components in the detection of the signal values, and to compare the signal values divided into classes or data derived from these signal values with comparison values for generating state information.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: December 3, 2013
    Assignee: Deere & Company
    Inventors: Folker Beck, Lutz Bischoff
  • Patent number: 8565959
    Abstract: Multiple leak rate methodologies are combined and operate in parallel in a system for providing optimal results under different tire conditions. The methodologies may operate continuously or alternatively. Tandem large leak rate and low leak rate algorithms and methodology, for example, may deployed in a system in which, for large leak rates, a large leak rate methodology is employed and used to trigger a warning. At some pre-designated low leak rate threshold value, the system employs a low leak rate methodology either as an exclusive diagnostic monitor or in parallel with the companion large leak rate methodology. In the low leak rate analytical system, a change in tire pressure is correlated to a change in energy within a vehicle system pursuant to the algorithm W=??P*dx and derivative algorithms are used to calculate a final time and pressure drop at the final time as a basis for issuing a low pressure warning.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: October 22, 2013
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Jack Edward Brown, Jr.
  • Publication number: 20130261879
    Abstract: A method for diagnosing breakdown cause of a vehicle is disclosed. In the method, several sound signals are sensed respectively with several sound sensing devices, which are respectively installed at several zones among the vehicle, from the vehicle. A current driving status of the vehicle is obtained through an electrical control unit (ECU) of the vehicle. Determine a sound source of the vehicle according to the sound signals. A breakdown cause of the vehicle is diagnosed according to the sound signals, the current driving status and the sound source.
    Type: Application
    Filed: May 21, 2012
    Publication date: October 3, 2013
    Applicant: Institute for Information Industry
    Inventors: Shi-Huang Chen, Jhing-Fa Wang, Tzyh-Jong Shang
  • Patent number: 8509963
    Abstract: The present invention includes system and methods for managing information systems on an aircraft through the use of a remote management center. At the management center, the status information from aircraft computer systems is monitored for fault conditions. The management center then performs maintenance on the computer system when a fault condition is noticed. Exemplary systems include a remote management center that manages several different computer systems on several different manned aircraft. The management center connects to the aircraft and computer system through data links.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: August 13, 2013
    Assignee: Rockwell Collins, Inc.
    Inventors: Geoffrey J. Barnes, Richard G. Moore
  • Patent number: 8498776
    Abstract: A system and method for fault diagnosis includes receiving information defining a relationship between failure modes and diagnostic trouble codes and extracting diagnostic trouble code data, including set times, frequency data and diagnostic trouble code sequence information for a plurality of diagnostic trouble codes relating to a plurality of failure modes. The system and method further include constructing a Markov chain using the diagnostic trouble code data for each of the plurality of failure modes, training the Markov chain to learn a set of state parameters using the diagnostic trouble code data, and computing a likelihood of a diagnostic trouble code sequence for each of the plurality of failure modes using the trained Markov chains.
    Type: Grant
    Filed: November 17, 2009
    Date of Patent: July 30, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Satnam Singh, Vineet R. Khare, Rahul Chougule
  • Patent number: 8467913
    Abstract: The present invention provides a method for providing a fault diagnosis for at least one system, in particular of an aircraft. The method comprises: (a) providing a number N1, n1?[1, . . . , N1], of systems, wherein the n1-th system, in each case, provides a number N2, n2?[1, . . . , N2], of instances of a main function of a number N3, n3?[1, . . . , N3], of main functions of the aircraft; (b) providing a number N4, n4?[1, . . . , N4], of IMA modules, wherein in each case the n4-th IMA module provides resources at least for the respective n2-th instances of the main functions; (c) providing a generic diagnostic unit; (d) instantiating the generic diagnostic unit to provide a predetermined number N5, n5?[1, . . . , N5], of instances of the generic diagnostic unit; and (e) configuring the n5-th instance, in each case, of the generic diagnostic unit for adaption of the corresponding n5-th diagnostic unit to at least one system.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: June 18, 2013
    Assignee: Airbus Operations GmbH
    Inventor: Denis Geiter
  • Patent number: 8457833
    Abstract: An apparatus is provided for diagnosing the state of health of a vehicle and for providing the operator of the vehicle with a substantially real-time indication of the efficiency of the vehicle in performing an assigned task with respect to a predetermined goal. A processor on-board the vehicle monitors sensors that provide information regarding the state of health of the vehicle and the amount of work the vehicle has done. In response to anomalies in the data from the sensors, the processor records information that describes events leading up to the occurrence of the anomaly for later analysis that can be used to diagnose the cause of the anomaly. The sensors are also used to prompt the operator of the vehicle to operate the vehicle at optimum efficiency.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: June 4, 2013
    Inventor: LeRoy G. Hagenbuch
  • Patent number: 8447456
    Abstract: A method of determining an engine intake air leak may include measuring an air flow rate into an internal combustion engine, comparing the measured air flow rate to a first predetermined air flow limit, calculating an estimated air flow rate into the engine when the measured air flow rate is less than the first predetermined air flow limit, comparing the estimated air flow rate to second and third predetermined air flow limits, and indicating an air leak when the estimated air flow rate is greater than the second predetermined air flow limit and less than the third predetermined air flow limit.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: May 21, 2013
    Inventors: Wenbo Wang, Kurt D. McLain
  • Patent number: 8433475
    Abstract: A maintenance computer system for an aircraft, including a network partitioned into a secured avionics zone and an open zone. The system includes a first software module accommodated in the avionics zone and a second software module accommodated in the open zone, the first module configured to follow a fault-finding logic tree, and the second module configured to present an electronic maintenance document, with the path along the fault-finding logic tree followed by the first module automatically and synchronously generating a presentation by the second module of pages of the maintenance document associated respectively with nodes of the tree.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: April 30, 2013
    Assignee: Airbus Operations SAS
    Inventor: Jean-Philippe Corbefin
  • Patent number: 8433472
    Abstract: A parameter identification-based fault isolation technique is provided for improving fault code settings and isolating faults. DTCs and PIDs are retrieved from a current serviced vehicle. PID data is obtained from prior serviced vehicles having same vehicle specifications as and under substantially similar operating conditions as the current serviced vehicles. A plurality of clusters is formed using PID data of the prior serviced vehicles using mutual dependence to one another. A joint probability distribution is determined as a function of a mutual dependence of the PID data. PID data is selected of the current serviced vehicle having coherence to the PID of the prior service vehicles. A mutual dependence of the PID data of the current serviced vehicle is projected on onto the corresponding joint probability distribution.
    Type: Grant
    Filed: August 4, 2010
    Date of Patent: April 30, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Satnam Singh, Aurobinda Routray, Aparna Rajaguru
  • Patent number: 8370018
    Abstract: A method of processing vehicle diagnostic data is provided for identifying likely vehicle fix(s) associated with a diagnostic data, and identifying a repair procedure(s) for correcting the likely fix(s). The process receiving vehicle diagnostic data from a vehicle onboard computer at a remote diagnostic database, the database being arranged to map vehicle diagnostic data to possible vehicle fix(s). The possible vehicle fix(s) are prioritized in accordance with ranked matches of the received diagnostic data to combinations of diagnostic data stored in a prior experience database. The prior experience database having an identified fix associated with each stored combination of diagnostic data. The fix associated with the highest ranked combination of diagnostic data is identified as the most likely fix. The most likely fix is mapped to a vehicle repair database, the most likely fix being directly mapped to an associated repair procedure for repairing the most likely fix.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: February 5, 2013
    Assignee: Innova Electronics, Inc.
    Inventors: Keith Andreasen, Robert Madison, Ieon Chen
  • Patent number: 8364337
    Abstract: A failure countermeasure support system for efficiently determining upon countermeasures to be executed for remedying a failure of a construction machine, based upon information about the failure. There are provided: a plurality of maintenance databases 2, 3, 4, and 5; a structured information database 100 in which the maintenance information in the maintenance databases 2, 3, 4, and 5 is structured; a structured information search section 13 which searches the structured information database on the basis of failure information about a mobile vehicle, and extracts one or more structured information records; and a display control section 15 which outputs a list of the one or more extracted structured information records. The outputted list includes link information to maintenance information in the maintenance databases 2, 3, 4, and 5, corresponding to structured information records which are included in this list.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: January 29, 2013
    Assignee: Komatsu Ltd.
    Inventors: Susumu Takahashi, Katsuhiko Udagawa, Masaya Hatayama, Daisuke Sato, Yoshinori Momiyama
  • Patent number: 8346424
    Abstract: A method of monitoring an onboard diagnostic system for a plug-in hybrid electric vehicle includes incrementing the denominator of an N/D ratio for the onboard diagnostic system only when a total time criteria, a vehicle speed criteria and an idle criteria are satisfied after an internal combustion engine of the vehicle has been fueled. The diagnostic system performance is summarized into a single N/D ratio. When an underperforming ratio is identified, the system controls the engine to provide more engine operation and subsequent diagnostic observability. The denominator of the N/D ratio is compared to a verification denominator to identify vehicles that are typically operated in a manner such that an engine-on cycle does not begin, or is not identified, until very near the end of the drive cycle, thereby preventing the denominator and a numerator of the N/D ratio from incrementing, and thereby providing a false passing performance ratio.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: January 1, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Andrew M. Zettel, John F. Van Gilder, Saul Scott
  • Patent number: 8340853
    Abstract: A motor vehicle has wheels on which it travels, a powertrain delivering propulsion torque to at least some of the wheels propel the vehicle, and a service brake system having service brakes. When the service brakes are applied by a service brake actuator, braking torque is applied to at least some wheels. A first device provides data representing a velocity that correlates with velocity of the vehicle, and a second device associated with the actuator provides data that distinguishes between application and non-application of the service brakes by the actuator. A processor monitors data from the first and second devices and processes the monitored data to provide a data output when the first device has disclosed velocity change indicative of the service brakes having been applied without the second device having disclosed that the service brakes have been applied.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: December 25, 2012
    Assignee: International Engine Intellectual Property Company, LLC
    Inventors: Rogelio Rodriguez, Ly V. Tran
  • Publication number: 20120323433
    Abstract: A vacuum system diagnostic is disclosed. In one example, vacuum system leaks are diagnosed via a pressure reading of a vacuum reservoir. The approach may reduce the number of sensors used to diagnose vacuum system degradation.
    Type: Application
    Filed: June 16, 2011
    Publication date: December 20, 2012
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: John Eric Rollinger, Ross Dykstra Pursifull
  • Patent number: 8306689
    Abstract: A net-centric avionics diagnostics and automated maintenance environment system includes a storage medium on which is stored diagnostic data concerning the operation of systems of an aircraft and diagnostic data of aircraft systems, including BIT data, an organizational level automated maintenance environment server to transport maintenance and diagnostic information throughout the automated maintenance environment. The system also includes an organizational level diagnostics avionics tester that has a processor to execute diagnostics software for gathering, storing, and processing avionics diagnostics information. The tester is linked to an interface device that includes data acquisition hardware, standard interfaces for an avionics unit under test, and instrumentation for troubleshooting the unit under test. The organizational level diagnostics avionics tester is in network communication with the organizational level automated maintenance environment server.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: November 6, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Craig Koepping, Russell Shannon, Thomas Richardson
  • Publication number: 20120259505
    Abstract: A method for analyzing faults present on a platform includes the following steps: (a) providing a table of correspondence between a plurality of observable symptoms on the platform (10) and the fault modes capable of creating each observable symptom; (b) measuring the observable symptoms present on the platform (10); (c) establishing at least one family of faults, including determining a list of fault modes capable of creating, alone or in combination, all of the selected present symptoms, placing each given fault mode of the group in a fault family, and grouping all of the fault modes capable of creating at least one selected present symptom shared with the given fault mode together in the same fault family as the given fault mode. The method is applicable to fault analyses on aircrafts.
    Type: Application
    Filed: April 5, 2012
    Publication date: October 11, 2012
    Applicant: DASSAULT AVIATION
    Inventors: Laurent TURBAN, Walter TURCO
  • Patent number: 8260488
    Abstract: When an abnormality of a vehicle is detected based on a vehicle state value that indicates the vehicle state, an abnormality analysis system for the vehicle estimates a cause of the abnormality. The abnormality analysis system includes: a factor identifying information extraction unit that extracts factor identifying information which is used to identify a factor of the abnormality based on the vehicle state value; a database that contains data groups which correspond to respective categories of the factor identifying information and which store causes of abnormalities and vehicle state values at the time of occurrence of the abnormalities; and an abnormality cause estimation unit that executes a process for estimating the cause of the abnormality of the vehicle with the use of the data group that corresponds to the category of the factor identifying information extracted by the factor identifying information extraction unit.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: September 4, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomoyasu Ishikawa, Toshiyuki Abe
  • Patent number: 8229620
    Abstract: A method for model-based diagnosis of a mechatronic system. A control unit within the mechatronic system performs error detection and an arithmetic unit outside of the mechatronic system performs error identification.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: July 24, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Walter Lehle, Jochen Assfalg, Martin Fritz, Frank Allgoewer
  • Patent number: 8224545
    Abstract: A brake control apparatus (20) includes: a hydraulic pressure source (30) that regulates pressure of hydraulic fluid in accordance with a brake operation input (24,25); a wheel cylinder (23) that applies braking force to a wheel (22) in response to a supply of the hydraulic fluid to the wheel cylinder (23); a hydraulic pressure booster mechanism (31) that amplifies the brake operation input by using the hydraulic pressure source (30), and outputs the amplified brake operation input; a hydraulic fluid supply path (63) through which the hydraulic fluid is supplied from the hydraulic pressure source (30) to the wheel cylinder (23); and a controller (70) that shuts off (valve 66) a flow of the hydraulic fluid-through the hydraulic fluid supply path (63), if a malfunction due to hydraulic fluid leakage is detected in the hydraulic fluid supply path (63) during a brake control mode in which the hydraulic fluid is supplied to the wheel cylinder (23) through the hydraulic fluid supply path (63).
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: July 17, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshito Tanaka, Hiroshi Nakaoka, Masaki Nanahara
  • Patent number: 8209080
    Abstract: A system for determining a most probable cause or causes of a problem in a plant is disclosed. The system includes a plant, the plant having a plurality of subsystems that contribute to the operation of the plant, the plurality of subsystems having operating functions that produce operational signals. A plurality of sensors that are operable to detect the operational signals from the plurality of subsystems and transmit data related to the signals is also provided. An advisory system is disclosed that receives an input, the input being in the form of data from the plurality of sensors, possible input root causes of the problem, possible input symptoms of the problem and/or combinations thereof. The advisory system has an autoencoder in the form of a recurrent neural network.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: June 26, 2012
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Danil V. Prokhorov, Setu Madhavi Namburu, Sandesh J. Ghimire, Liu Qiao
  • Patent number: 8204647
    Abstract: In an electric power steering system, an electric motor generates output power for power-assisting steering operation of a steering wheel, a torque sensor generates a plurality of electric output signals corresponding to a torque applied to the steering wheel, and a control unit controls the steering operation of the electric motor in accordance with at least one of the electric output signals of the torque sensor. The control unit detects a difference between rotation speeds of left and right steered wheels, checks whether any one of the plurality of output generating parts is in failure, and specify a failing-device based on the rotation speed difference and the plurality of output signals.
    Type: Grant
    Filed: July 1, 2009
    Date of Patent: June 19, 2012
    Assignee: Denso Corporation
    Inventor: Naoki Nakane
  • Publication number: 20120150383
    Abstract: A method and system for monitoring and predicting failure in pumps on operating vehicles is disclosed. The method may comprise measuring a plurality of a pressure drops across an orifice in a case drain line of a vehicle operating in drive gear, determining an actual case drain flow rate for each measured pressure drop, selecting a plurality of the actual case drain flow rates, estimating for each selected actual case drain flow rate an estimated flow rate for the case drain line and displaying the difference between the actual case drain flow rate and the estimated flow rate for each selected actual case drain flow rate.
    Type: Application
    Filed: December 14, 2010
    Publication date: June 14, 2012
    Applicant: CATERPILLAR, INC.
    Inventor: Richard D. Douglas
  • Patent number: 8195354
    Abstract: A diagnostic device of an internal combustion engine diagnoses a condition of a differential pressure sensor. The sensor in a normal condition detects a differential pressure of an exhaust gas between upstream and downstream sides of a diesel particulate filter disposed in an exhaust system of the engine. The sensor in a fault condition detects no differential pressure of the exhaust gas. The device has a block obtaining a first signal from the sensor when the engine is operated in a low flow rate region of the exhaust gas and obtaining a second signal from the sensor when the engine is operated in a high flow rate region of the exhaust gas. A diagnostic block of the device judges from a difference between levels of the first and second signals whether the sensor is in the normal or fault condition.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: June 5, 2012
    Assignee: Denso Corporation
    Inventors: Yasuhiro Kariya, Tsukasa Kuboshima
  • Patent number: 8160792
    Abstract: A failure detection system for accurately detecting a failure of a clutch. A clutch actuation mechanism changes the relative positions of drive-side and driven-side members of the clutch. A position detector detects a position of the clutch actuation mechanism as a clutch position. A control unit obtains torque transmitted from the drive-side member to the driven-side member as actual transmission torque. The control unit detects a failure of the clutch based on the actual transmission torque and the clutch position.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: April 17, 2012
    Assignee: Yamaha Hatsudoki Kabushiki Kaisha
    Inventor: Kengo Minami
  • Patent number: 8150576
    Abstract: A motor vehicle engine (10) has glow plugs (20) for aiding combustion of fuel in combustion chambers of the engine when the engine is cold and an ignition switch (24) is operated to crank the engine. An aberration in engine speed (36) is used to indicate an under- or non-performing glow plug. Data from sources other than the engine speed source (28), such as data related to engine fueling, is also processed by a processor (30) to exclude them as the cause of the aberration.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: April 3, 2012
    Assignee: International Engine Intellectual Property Company LLC
    Inventors: Richard Ptak, Ly V. Tran, David M. Hsia
  • Publication number: 20120053782
    Abstract: A method performed by a vehicle computing system includes detecting the triggering of a vehicle sensor indicating an abnormal vehicle condition and determining one or more likely abnormal vehicle conditions associated with the triggering of the sensor. The method also includes accessing a vehicle database to determine one or more pieces of information relating to the one or more abnormal vehicle conditions. The method further includes electronically presenting the one or more pieces of information to a vehicle user.
    Type: Application
    Filed: August 26, 2010
    Publication date: March 1, 2012
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Thomas M. Gwozdek, Matthew Roger DeDona, James A. Lathrop, Venkateswa Anand Sankaran, Karin Lovett, Steven F. Chorian