Patent application number | Description | Published |
20080208410 | Secure Control Mode Transition Methods for an Active Front Steer System - A system and method for secure and restricted transitions between steering control modes for a vehicle with active front steering is disclosed. Possible operating control modes include precision, electric phase locking, and proportional integral derivative (PID) modes. Each operating control mode is monitored and the operational status of the modes are checked before transitioning. For security, the system can prevent transitions from PID to precision control mode and restrict electric phase locking mode to transition only to a mechanical locking mode. | 08-28-2008 |
20080255720 | Method and Apparatus for Validating Processors Using Seed and Key Tests - A method for validating a processor with a memory in a vehicle control system includes the steps of receiving a test seed, retrieving a pre-stored test key from the processor memory, calculating a check value using the test seed, and comparing the check value to the pre-stored test key. | 10-16-2008 |
20080288135 | Secure Data Strategy for Vehicle Control Systems - A method of providing secure data from vehicle operational variable data that includes a plurality of data message bits includes the steps of dividing the plurality of data message bits into a first group of data message bits and a second group of data message bits, encoding the first group of data message bits using a data map to generate a plurality of encoded data message bits, and generating the data message from the plurality of encoded data message bits and the second group of data message bits. | 11-20-2008 |
20080306654 | Parametric Remedial Action Strategy for an Active Front Steer System - A vehicle parametric active front steering (AFS) system remedial action is described herein. AFS system modules inter-communicate via messages containing parameters. The AFS system detects a message error, determines an invalid parameter, and takes appropriate remedial action. An error is detected if an error condition is satisfied or if occurrence of incorrect messages reaches or exceeds a certain predetermined frequency. The AFS system takes the remedial action by setting default values of valid parameters corresponding to the invalid parameter. | 12-11-2008 |
20080319622 | Operation of Electronic Stability Control Systems Using Data from a Plurality of Sources - A method for operating a vehicle electronic stability control (“ESC”) system utilizing values for a variable obtained from a primary source and a redundant source includes the steps of receiving a first value for the variable from the primary source, receiving a second value for the variable from the redundant source, generating a normalized value as a function of the first value and the second value, determining whether the primary source is operating correctly, utilizing the first value for operation of the vehicle ESC system if the primary source is operating correctly, and utilizing the second value for operation of the vehicle ESC system if the primary source is not operating correctly and the second value is not greater in absolute value than the normalized value. | 12-25-2008 |
20090097343 | METHOD AND SYSTEM FOR TESTING ADDRESS LINES - Method and systems are described for testing an address line inter- coupling a processor and a memory. The contents of a first address in the memory are initially compared with the contents of a second address in the memory, wherein each of the first and second addresses are addressable in the memory by a different value applied on the address line. If the contents of the first and second addresses match, the contents of either one of the first and second addresses are changed, and a subsequent comparison of the contents of the first and second memory addresses is performed. If the second comparison determines that contents of the first and second memory address still match, then a fault condition associated with the address line is identified. | 04-16-2009 |
20090099729 | METHODS AND SYSTEMS FOR CONTROLLING STEERING IN A VEHICLE USING A PRIMARY ACTIVE STEERING FUNCTIONALITY AND A SUPPLEMENTAL ACTIVE STEERING FUNCTIONALITY - A method for controlling steering in a vehicle includes the steps of obtaining a vehicle steering communication, controlling an actuator coupled to a hand wheel, a road wheel, or both using a primary active steering functionality, if the vehicle steering communication reflects one or more of a plurality of types of specified errors, and controlling the actuator using the primary active steering functionality and a supplemental active steering functionality, if the vehicle steering communication does not reflect one or more of the plurality of types of specified errors. | 04-16-2009 |
20090115653 | MULTI-CELL VOLTAGE SECURE DATA ENCODING IN HYBRID VEHICLES - A method of encoding data related to voltages for each of a plurality of battery cells for transmission in a hybrid vehicle includes the steps of generating a plurality of voltage groups, and generating a validity measure for each of the plurality of voltage groups. Each of the plurality of voltage groups comprises the voltages for a different combination of the plurality of battery cells. | 05-07-2009 |
20100057272 | METHODS AND SYSTEMS FOR SECURING VEHICLE DATA - A method for securing vehicle data that includes a plurality of data messages includes the steps of determining a sequence for the plurality of data messages, selecting a plurality of identifier values for the plurality of data messages such that each of the plurality of identifier values are at least two bit errors removed from another, and assigning one of the plurality of identifier values to each of the plurality of data messages, based at least in part on the sequence. | 03-04-2010 |
20100057282 | METHODS AND SYSTEMS FOR PROVIDING COMMUNICATIONS BETWEEN A BATTERY CHARGER AND A BATTERY CONTROL UNIT FOR A HYBRID VEHICLE - A method for communicating between a battery charger and a battery control unit in a hybrid vehicle includes the steps of forming a first message with at least a renewable energy storage system (RESS) command and a command security measure for the RESS command, transmitting the first message from the battery control unit to the battery charger, forming a second message in response to the first message with at least an RESS response and a response security measure for the RESS response, and transmitting the second message from the battery charger to the battery control unit. | 03-04-2010 |
20100100345 | SYSTEM AND METHOD FOR IDENTIFYING ISSUES IN CURRENT AND VOLTAGE MEASUREMENTS - First and second reference voltages are applied to first and second terminals of a processor via voltage divider circuits. First and second signal conditioning circuits are coupled to third and fourth terminals of the processor, respectively, and voltage or current sensors are coupled to the first and second signal conditioning circuits. The processor measures the electrical characteristics at the third and fourth terminals and computes first and second ratiometric values of the electrical characteristics, wherein the first ratiometric value is based upon a measurement obtained from the third terminal and the first reference voltage and the second ratiometric value is based upon a measurement of obtained from the fourth terminal and the second reference voltage. The processor further identifies an issue if a ratio of the first ratiometric value to the second ratiometric value exceeds a ratio of the first reference value to the second reference value. | 04-22-2010 |
20100299585 | SERIAL DATA COMMUNICATION - CAN MEMORY ERROR DETECTION METHODS - A method is provided for formatting a message, with a first plurality of bits forming a data component, and a second plurality of bits forming a reserved component, for transmission in a vehicle. The method comprises the steps of calculating an initial checksum from the data component, calculating a revised checksum at least from the initial checksum, and storing the revised checksum in the reserved component. The number of bits in the reserved component is less than the number of bits in the data component. | 11-25-2010 |
20120245793 | MULTI-CELL VOLTAGE SECURE DATA ENCODING IN HYBRID VEHICLES - Methods and systems are provided for encoding vehicle data comprising a first voltage pertaining to a first battery cell and a second voltage pertaining to a second battery cell is provided. A determination is made as to whether the first voltage is valid. In addition, a determination is made as to whether the second voltage is valid. One of a plurality of values is assigned to a validity measure based at least in part on whether the first voltage or the second voltage, or both, are valid. The plurality of values, in binary form, are at least two bit errors removed from one another. | 09-27-2012 |