| Patent application number | Description | Published |
|---|
| 20080236269 | Brake Pad Prognosis System - A method for providing an estimate of brake pad thickness. The method employs fusion of sensors, if used, and driver brake modeling to predict the vehicle brake pad life. An algorithm is employed that uses various inputs, such as brake pad friction material properties, brake pad cooling rate, brake temperature, vehicle mass, road grade, weight distribution, brake pressure, brake energy, braking power, etc. to provide the estimation. The method calculates brake work using total work minus losses, such as aerodynamic drag resistance, engine braking and/or braking power as braking torque times velocity divided by rolling resistance to determine the brake rotor and lining temperature. The method then uses the brake temperature to determine the brake pad wear, where the wear is accumulated for each braking event. A brake pad sensor can be included to provide one or more indications of brake pad thickness from which the estimation can be revised. | 10-02-2008 |
| 20090045815 | METHOD AND APPARATUS FOR MANAGING POWER FLOW OF AN ELECTRIC POWER STORAGE DEVICE - An electrical power storage device provides power to crank an internal combustion engine. Thereafter available power from the electric power storage device to crank the engine again is continually updated. Remedial measures are invoked if the available power is less than a predetermined power threshold. | 02-19-2009 |
| 20090198408 | Method and Apparatus for Diagnosis of Sensors Faults Using Adaptive Fuzzy Logic - A method for monitoring the sensors in a vehicle control system. The method includes identifying a plurality of potential faults, identifying a plurality of measured values, and identifying a plurality of estimated values based on models in the control system. The method further includes identifying a plurality of residual error values as the difference between the estimated values and the measured values. The method also defines a plurality of fuzzy logic membership functions for each residual error value. The fuzzy logic membership functions are adaptive in that they change depending on the vehicle operating region, i.e., the non-linearity level of the vehicle, and the vehicle operating conditions, i.e., steady state verses transients. A degree of membership value is determined for each residual error value based on the membership functions. The degree of membership values are then analyzed in a fuzzy logic reasoning system to determine whether a potential fault exists. | 08-06-2009 |
| 20090295559 | INTEGRATED HIERARCHICAL PROCESS FOR FAULT DETECTION AND ISOLATION - A system and method for determining the root cause of a fault in a vehicle system, sub-system or component using models and observations. In one embodiment, a hierarchical tree is employed to combine trouble or diagnostic codes from multiple sub-systems and components to get a confidence estimate of whether a certain diagnostic code is accurately giving an indication of problem with a particular sub-system or component. In another embodiment, a hierarchical diagnosis network is employed that relies on the theory of hierarchical information whereby at any level of the network only the required abstracted information is being used for decision making. In another embodiment, a graph-based diagnosis and prognosis system is employed that includes a plurality of nodes interconnected by information pathways. The nodes are fault diagnosis and fault prognosis nodes for components or sub-systems, and contain fault and state-of-health diagnosis and reasoning modules. | 12-03-2009 |
| 20090322283 | Method for battery capacity estimation - An embodiment contemplates a method for estimating a capacity of a battery. A state of charge is determined at a first instant of time and at a second instant of time. A difference in the state of charge is determined between the first instant of time and the second instant of time. A net coulomb flow is calculated between the first instant of time and the second instant of time. The battery capacity is determined as a function of the change in the state of charge and the net coulomb flow. | 12-31-2009 |
| 20090322340 | Method for battery state-of-health monitoring using battery voltage during vehicle starting - A method is provided for determining a battery's state-of-health. An initial battery voltage is measured after a first voltage drop during an initiation of an engine cranking phase. A battery voltage is monitored during the remainder of the engine cranking phase. A lowest battery voltage is determined during the remainder of the engine cranking phase. A determination is made if a voltage difference between the lowest battery voltage and the initial battery voltage at the initiation of the engine cranking phase is less than a voltage threshold. A low battery state-of-health is identified in response to the voltage difference being less than the voltage threshold. | 12-31-2009 |
| 20100026306 | METHOD AND APPARATUS FOR TELEMATICS-BASED VEHICLE NO-START PROGNOSIS - A system and method for determining the status of a vehicle battery to determine whether the battery may not have enough charge to start the vehicle. The method includes collecting data relating to the battery on the vehicle and collecting data relating to the battery at a remote back-office. Both the vehicle and the remote data center determine battery characteristics based on the collected data and the likelihood of a vehicle no-start condition, where the algorithm used at the remote back-office may be more sophisticated. The data collected at the remote back-office may include vehicle battery information transmitted wirelessly from the vehicle, and other information, such as temperature, battery reliability, miles that the vehicle has driven per day, ambient temperature, high content vehicle, etc. Both the vehicle and the remote back-office may determine the battery open circuit voltage. | 02-04-2010 |
| 20100042287 | PROACTIVE VEHICLE SYSTEM MANAGEMENT AND MAINTENANCE BY USING DIAGNOSTIC AND PROGNOSTIC INFORMATION - A system and method for providing proactive vehicle system management and maintenance using diagnostic and prognostic information. Vehicle information is collected from vehicle sensors and/or sub-systems by an on-board module on the vehicle and/or at a remote facility where the information is wirelessly transmitted to the remote facility. The collected information is analyzed to determine the health of various systems, sub-systems and components so that the remaining useful life of the systems, sub-systems and components can be predicted. By utilizing the diagnostic and prognostic information, a vehicle control strategy can be reconfigured to minimize customer impact. Further, if a software problem is detected, temporary or permanent software fixes can be provided automatically and remotely through a remote service garage. | 02-18-2010 |
| 20100063668 | TELEMATICS-ENABLED AGGREGATED VEHICLE DIAGNOSIS AND PROGNOSIS - A system and method for telemetrically collecting on-road vehicle diagnostic data. In one embodiment, the method includes collecting vehicle diagnostic data from service shops, on-road vehicles and warranty records, aggregating the collected data and extracting knowledge therefrom. The extracted knowledge can be used to enhance algorithms on-board vehicles or at service centers so as to better identify vehicle faults and provide enhanced diagnostics and prognostics. The enhanced algorithms can then be used to provide predictive maintenance suggestions, provide trouble shooting assistance or provide vehicle design improvements. | 03-11-2010 |
| 20100106357 | COMBINED EVIDENCE VEHICLE HEALTH MONITORING - A method is provided for fusing a plurality of self-contained diagnostics for generating a combined state of belief for a monitored system. A plurality of predetermined diagnostic states of self-contained diagnostic routines is executed. Each self-contained routine generates a respective state of belief result for the monitored system. Respective belief vectors are formulated as a function of belief results. A state space is provided that includes a plurality of sub-state spaces. Each of the sub-state spaces is representative of the predetermined diagnostic states of the monitored system. Belief vectors are assigned to the sub-state spaces of the state space. Belief vectors relating to each sub-state space are fused. A combined belief value is determined for each fused sub-state space. The sub-state space having the highest combined belief value is indicated in response to the determined probabilities as the actual diagnostic state of the monitored system. | 04-29-2010 |
| 20100131165 | REAL-TIME IDENTIFICATION OF MAXIMUM TIRE-ROAD FRICTION COEFFICIENT BY INDUCED WHEELS ACCELERATION/DECELERATION - A method for estimating the maximum tire/road surface coefficient of friction for a vehicle that includes actively inducing a small amount of acceleration or deceleration to the front wheels or the rear wheels of the vehicle and inducing a corresponding and opposite amount of acceleration or deceleration to the other of the front wheels or the rear wheels of the vehicle so that the acceleration and deceleration cancel each other and the perceived speed of the vehicle does not change. The tire/road surface coefficient of friction and a wheel-slip ratio can be used to determine a road surface condition. | 05-27-2010 |
| 20100154524 | CRANKING CAPABILITY ESTIMATION FOR A VEHICULAR STARTING SYSTEM - A method is provided for determining a cranking capability of a starting system for an internal combustion engine. An average power output of a battery is determined for the starting system during a start engine cranking interval. A temperature of the starting system is determined at an initiation of the start engine cranking interval. A predetermined average power output capability for a battery having a full state of charge at the determined temperature is looked up. A predetermined minimum average power output required of the battery for starting the respective engine at the determined temperature is looked up. A state of function based on the determined average power outputs is determined. The cranking capability of the starting system is identified in response to the determined state of function. | 06-24-2010 |
| 20100179720 | AUTONOMOUS VEHICLE MAINTENANCE AND REPAIR SYSTEM - A system and method for providing autonomous and remote vehicle maintenance and repair. The system employs an on-board diagnosis and prognosis module that monitors one or more vehicle buses to identify trouble codes and other information indicating a vehicle problem. The on-board module causes a telematic device on the vehicle to broadcast a message including a problem code that identifies the problem the vehicle is having. A remote repair center may receive the message and may identify a software upgrade patch associated with the problem that can be transmitted to the vehicle to upgrade its software to correct the problem. Also, the message may be received by another vehicle that is part of a broadcast network that has previously received the software upgrade patch to fix a problem on that vehicle, where the receiving vehicle may transmit the software upgrade patch to the vehicle having the problem. | 07-15-2010 |
| 20100191414 | INTEGRATED DIAGNOSIS AND PROGNOSIS SYSTEM AS PART OF THE CORPORATE VALUE CHAIN - An integrated diagnosis and prognosis system that collects vehicle information over the life of a vehicle and its development. The system provides the collected vehicle information to supplier management, product development management, service/dealership management, customer relations departments and production facilities, which use the information to take certain action for existing vehicles, fleets of vehicles or future vehicles to improve vehicle reliability and quality. | 07-29-2010 |
| 20100217478 | TELEMATICS-BASED VEHICLE STATUS MONITORING AND CUSTOMER CONCERN RESOLVING - A system and method for monitoring the state of health of vehicle components, sub-systems and systems on board the vehicle and/or remotely, and use collected information and data about the vehicle to establish a database for the vehicle as to the state of health of the various components, sub-systems and systems. When a customer brings a vehicle to a service center or dealership complaining about a particular problem, and the service center wishes to replace a part associated with that problem, the OEM or manufacturer can authorize or reject the replacement of the part based on review of the database as to the known state of health of the part. Therefore, only parts which may not be healthy will typically be authorized for replacement. Also, the database can be made available to customers for customer concern resolving. | 08-26-2010 |
| 20100217545 | Method and Apparatus for Monitoring Solenoid Health - A method for monitoring the state of health (SOH) of a solenoid powered by a battery includes measuring a voltage and a current supplied to the solenoid by the battery, using a processor to determine each of an equivalent resistance and inductance of the solenoid using the voltage and the current, comparing the equivalent resistance and the equivalent inductance to a corresponding calibrated threshold, and recording deviations from the corresponding calibrated thresholds as a pair of SOH values. A trend of the SOH values is continuously monitored, and an appropriate control action is taken when either SOH value drops below a calibrated lower limit. A solenoid monitoring system includes a solenoid, voltage and current sensors, and a controller having an algorithm for continuously monitoring a state of health (SOH) of the solenoid as set forth above. | 08-26-2010 |
| 20100228423 | AGGREGATED INFORMATION FUSION FOR ENHANCED DIAGNOSTICS, PROGNOSTICS AND MAINTENANCE PRACTICES OF VEHICLES - A system and method for enhancing vehicle diagnostic and prognostic algorithms and improving vehicle maintenance practices. The method includes collecting data from vehicle components, sub-systems and systems, and storing the collected data in a database. The collected and stored data can be from multiple sources for similar vehicles or similar components and can include various types of trouble codes and labor codes as well as other information, such as operational data and physics of failure data, which are fused together. The method generates classes for different vehicle components, sub-systems and systems, and builds feature extractors for each class using data mining techniques of the data stored in the database. The method also generates classifiers that classify the features for each class. The feature extractors and feature classifiers are used to determine when a fault condition has occurred for a vehicle component, sub-system or system. | 09-09-2010 |
| 20110000421 | METHOD AND APPARATUS TO ESTIMATE AUTOMOTIVE ALTERNATOR BELT SLIP - An embodiment contemplates a method for determining belt slip in a vehicle. The vehicle includes an engine and an alternator rotatably coupled by an accessory drive belt. The accessory drive belt engaging a rotating member of the engine for driving a rotating member of the alternator. A battery voltage is measured. An estimated battery voltage is determined as a function of engine speed. The belt slip of the alternator is detected in response to a comparison of the estimated battery voltage and the measured battery voltage. | 01-06-2011 |
| 20110125430 | METHOD AND APPARATUS TO MONITOR STATE OF HEALTH OF ELECTRICAL CONNECTIONS BETWEEN BATTERY AND GENERATOR - A system and method for monitoring the state of health of the connection between a generator and a battery includes detecting an interruption in power between the generator and the battery, incrementing a counter each time an interruption is detected, generating a trend of a number of interruptions over time based on a number of increments in the counter, monitoring a rate of increase in the number of interruptions over time and determining if the rate of increase in the number of interruptions over time is greater than a predetermined threshold. | 05-26-2011 |
