Gm Global Technolgoy Operations, Inc.

Kwang-Keun Shin

Mutasim Abdurrahman Salman

Bakhtiar Brian Litkouhi

Shih-Ken Chen

Jin-Woo Lee

Jihan Ryu

Yilu Zhang

Xidong Tang

David J Verbrugge

Hong S Bae

Yuen-Kwok Chin

Mark N Howell

Satish Rajagopalan

Jun-Mo Kang

William C Lin

Hanho Yun

Robert W Leschuk

A method includes recording a current performance signature for first and second components in a system, recording a calibrated baseline performance signature for the components, and processing the performance signatures through an aging model to determine a future performance signature for each component. The future performance signatures are processed through a system function model to determine the state of function of the system for each possible repair case. A cost-optimal repair case is then determined from among the possible repair cases, and recorded in memory. An apparatus includes first and second components of a system, and a host machine configured for processing the current and baseline performance signatures through the aging and system function models as noted above. The cost-optimal repair case is determined from among all possible repair cases, and then recorded in memory. An example system may be a cranking system with a starter motor and battery.

Cost-optimized model-based extension of system life

A method to control a non-linear system includes operating a learning cycle to approximate characteristics of the system and, once the learning cycle is complete, operating the system based upon the characteristics. The learning cycle includes monitoring operation of the system, approximating the characteristics of the system with a recursive least squares approximation based upon the monitored operation, comparing variance of the operation to a threshold variance, and completing the learning cycle based upon the variance exceeding the threshold variance.

Method to complete a learning cycle of a recursive least squares approximation

A starting system for an internal combustion engine includes a starter motor and a battery. A method for evaluating the starting system includes detecting a fault associated with the starter motor when a minimum starting system voltage during a cranking event is greater than a threshold minimum starting system voltage determined in relation to an engine acceleration parameter, and detecting a fault associated with the battery when the engine acceleration parameter is less than a minimum threshold for the engine acceleration parameter.

Method and apparatus to evaluate a starting system for an internal combustion engine

A method is provided for determining a battery capacity for a vehicle battery. Open circuit voltages of a vehicle battery are measured during ignition startups. A battery parameter is estimated for the vehicle battery that is a function of a present open circuit voltage measurement for a present ignition startup, a function of at least one open circuit voltage observation of a previous ignition startup, a function of a current draw integration over a time period from a previous ignition startup event to a present ignition startup event, and a function of an adjustment factor. A battery parameter is determined based on a new battery. The battery capacity is calculated as function of the battery parameter for the vehicle battery and the battery parameter for the new battery.

Method and apparatus for estimating battery capacity of a battery

A method of determining a state-of-charge for a battery is provided. A startup state-of-charge of the battery is determined as a function of a present open circuit voltage measurement for a present ignition startup, at least one open circuit voltage observation of a previous ignition startup, and a current draw integration over a time period from a previous ignition startup event to a present ignition startup event. A run state-of-charge change of the battery is determined for an ignition key-on operation. The run state-of-charge change comprises a difference between the present open circuit voltage measurement and the at least one previous open circuit voltage observation, and is determined in response to of a current draw integration over a respective period of time. The state-of-charge of the battery is calculated based on a function of the startup state-of-charge and the run state-of-charge change of the battery.

Method and apparatus for estimating SOC of a battery

A system and method for determining the health of a component includes retrieving measured health signatures from the component, retrieving component usage variables, estimating component health signatures using an aging model, determining an aging derivative using the aging model and calculating an aging error based on the estimated component health signatures, the aging derivative and the measured health signatures.

Method and apparatus for vehicle component health prognosis by integrating aging model, usage information and health signatures

A system and a method for detecting the eyes of a driver of a vehicle using a single camera. The method includes determining a set of positional parameters corresponding to a driving seat of the vehicle. The camera is positioned at a pre-determined location inside the vehicle, and a set of parameters corresponding to the camera is determined. The location of the driver's eyes is detected using the set of positional parameters, an image of the driver's face and the set of parameters corresponding to the camera.

Eye detection system using a single camera

A method for monitoring a starter motor for an internal combustion engine includes calculating a first engine power during a starting event based on an electric power flow from the battery to the starter motor, calculating a second engine power during the starting event based on an engine kinetic energy, and detecting a fault associated with the starter motor as a function of the difference between the first engine power and the second engine power.

Method and apparatus for monitoring a starter motor for an internal combustion engine

The velocity of a vehicle is controlled according a cruise control system that has a plurality of cruise control features. Each of the cruise control features has a current desired velocity requirement which can be used to determine a single current desired velocity for controlling the vehicle. A future desired velocity requirement can be predicted for each of the cruise control features over a time period. Vehicle acceleration can be determined from the difference of the current desired velocity and the predicted future velocity for controlling the velocity and acceleration of the vehicle to the predicted future velocity.

Method for integrating multiple feature adaptive cruise control

A system and method for automatically adjusting the viewing angle of both side rear-view mirrors on a vehicle when the vehicle is traveling on a hill. The system estimates the slope of the hill, and uses the estimated slope to determine a corrected viewing angle of the rear-view mirrors. Depending on whether the vehicle is traveling uphill or down-hill, would depend on which direction the rear-view mirrors will be adjusted.

Road-adaptive side mirror adjustment system

A host vehicle's speed is controlled with a target vehicle following control system when following a target vehicle. The target vehicle following control system monitors a range with respect to a target vehicle and a speed of the host vehicle. The target vehicle following device determines operation of the vehicle based upon a control region by comparing the range and the speed of the host vehicle to a simple sliding surface, which defines a minimum range between the host vehicle and target vehicle and a modified sliding surface, which increases the margin to the simple sliding surface as the speed of the host vehicle increases. The host vehicle has an acceleration determined based on the control region and is used to control operation of the host vehicle.

Method and apparatus for target vehicle following control for adaptive cruise control

A system and method for providing component and sub-system state of health prognosis in a complex system using fault models and component aging models. The method includes determining a current state of health value for a sub-system using fault signature test results and determining current state of health values for a plurality of components in the sub-system using the fault signature test results. The method also determines current state of health values for components in the system that cannot use fault signature test results using a first probability model and the current state of health values for the plurality of components. The method determines predicted future state of health values for the components in the sub-system using component aging models and determines a predicted future state of health value for the sub-system using a second probability model and the future state of health values of the components.

Health prognosis for complex system using fault modeling

A system and method for determining the state of health of a starter motor to notify a vehicle driver of a potential starter motor failure before the failure actually occurs. The starter motor includes an armature and motor brushes each providing a resistance, and an armature coil providing an armature inductance. Further, the starter motor has a back EMF because of the starter motor being coupled to a flywheel and the vehicle engine. The system and method monitor the combined resistance of the armature and the motor brushes, the inductance of the armature and a back EMF constant of the motor, and provide a signal indicating a potential starter motor failure if any of these three values significantly deviates from nominal values. In one embodiment, the analysis of the motor resistance, armature inductance and back EMF constant is provided by a regression model to determine estimated motor parameters.

Method and apparatus for starter motor diagnosis and prognosis using parameter estimation algorithm

Mirrors on a motor vehicle are adjusted by monitoring the position of a first, preferably manually adjusted, mirror and adjusting the position of additional mirrors based on the monitored position of the first one of the mirrors.

Automatic rearview mirror adjustment system for vehicle

A system and method for automatically correcting the viewing angle of a rear-view mirror on a vehicle towing a trailer when the vehicle is traveling around a curve. If the dimensions of the trailer are unknown, then the corrected viewing angle is the same as the hitch angle between the vehicle and the trailer. If the dimensions of the trailer are known, then trigonometry is used to determine the corrected viewing angle. Depending on whether the road is curving to the right or to the left will determine whether the left side rear-view mirror or the right side rear-view mirror is adjusted.

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Rochester Hills, MI, United States of America

Kwang-Keun Shin