Fail-safe System Patents (Class 701/92)
  • Patent number: 10436125
    Abstract: A vehicle monitoring system for turning off an idling engine comprises a vehicle speed sensor configured to detect a lack of motion, or “stationary status” of a vehicle and emit a parameter correlated to the motion status of the vehicle, a transmission status detector configured to detect a transmission status of the vehicle, an alerting device capable of warning other drivers of a stationary status of the vehicle and a control device. The control device is coupled to the vehicle speed sensor, the transmission status detector and the alerting device, wherein the vehicle speed sensor and the transmission status detector send a signal to the control device and the control device operates in a manner dependent on the motion status of the vehicle and the transmission status of the vehicle.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: October 8, 2019
    Assignee: Vision Works IP Corporation
    Inventors: Alfred S. Braunberger, Beau M. Braunberger
  • Patent number: 8930036
    Abstract: An electrical network architecture including a reconfigurable interface layer, along with a corresponding reconfiguration methodology. The interface layer is comprised of reconfigurable interface devices which allow a plurality of sensors and actuators to communicate with a plurality of control units. Each sensor or actuator is connected to multiple interface devices, which in turn are connected to a bus. The control units are also connected to the bus. In the event of an interface device failure, other interface devices can be reconfigured to maintain communication between sensors, actuators and control units. In the event of a control unit failure, the interface devices can be reconfigured to route sensor and actuator message traffic to a different control unit which can handle the functions of the failed control unit. The overall number of control units can also be reduced, as each control unit has flexible access to many sensors and actuators.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: January 6, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Dipankar Das, Vinod Kumar Agrawal, Seetharaman Rajappan
  • Patent number: 8903574
    Abstract: In a system and method for communicating data in a locomotive consist or other vehicle consist (comprising at least first and second linked vehicles), a first electronic component in the first vehicle of the vehicle consist is monitored to determine if the component is in (or enters) a failure state. In the failure state, the first electronic component is unable to perform a designated function. Upon determining the failure state, data is transmitted from the first vehicle to a second electronic component on the second vehicle, over a communication channel linking the first vehicle and the second vehicle. The second electronic component is operated based on the transmitted data, with the second electronic component performing the designated function that the first electronic component is unable to perform.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: December 2, 2014
    Assignee: General Electric Company
    Inventors: Jared Klineman Cooper, Eugene A. Smith, Nick David Nagrodsky, William Cherrick Schoonmaker, Todd William Goodermuth
  • Patent number: 8798849
    Abstract: A method and device for dual-channel transmission of safety-relevant sensor signals. In the method, two sensor signals to be monitored are generated parallel to one another by two sensors and the generated sensor signals are transmitted to a common evaluation unit via two separate, input-side transmission channels. Within the evaluation unit, the permissibility of the transmitted sensor signals is checked using prescribed calculation specifications that correspond to one another and an evaluation unit output signal representing permissibility or impermissibility is generated for each sensor signal. The individual processing steps of the two calculation specifications are decoupled by the evaluation unit for the two sensor signals and performed diversified within the evaluation unit. The generated output signals are output via two separate, output-side transmission channels.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: August 5, 2014
    Assignee: MAGNA Powertrain AG & Co. KG
    Inventors: Thomas Eggert, Heinz Langbauer
  • Patent number: 8706358
    Abstract: A braking control system includes sensors for detecting pressure applied to a brake pedal. The system can also include a pressure sensor capable of detecting the hydraulic pressure of the braking system. The system can also include a position sensor for detecting a position of the brake pedal. The pressure applied to the brake pedal is compared to either the hydraulic pressure or the pedal position. If the resulting measurements are not correlated properly, braking countermeasures are applied. Braking countermeasures can include engine braking, regenerative braking, hydraulic assist, and brake pad assist.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: April 22, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventor: David S. DeWitt
  • Patent number: 8706377
    Abstract: A controller system in which a plurality different main functions are integrated includes a plurality of microcontrollers. Each of the microcontrollers is associated with one of the main functions. At least one monitoring unit is implemented for the plurality of the main functions, for example a brake monitor and a comfort monitor. When the at least one monitoring unit detects a defect of a main function in the controller, only the defective main function is deactivated.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: April 22, 2014
    Assignee: Autoliv Development AB
    Inventors: Lothar Weichenberger, Franz Obesser
  • Patent number: 8645010
    Abstract: In a system and method for communicating data in a locomotive consist or other vehicle consist (comprising at least first and second linked vehicles), a first electronic component in the first vehicle of the vehicle consist is monitored to determine if the component is in (or enters) a failure state. In the failure state, the first electronic component is unable to perform a designated function. Upon determining the failure state, data is transmitted from the first vehicle to a second electronic component on the second vehicle, over a communication channel linking the first vehicle and the second vehicle. The second electronic component is operated based on the transmitted data, with the second electronic component performing the designated function that the first electronic component is unable to perform.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: February 4, 2014
    Assignee: General Electric Company
    Inventors: Jared Klineman Cooper, Eugene A. Smith, Nick David Nagrodsky, William Cherrick Schoonmaker, Todd William Goodermuth
  • Patent number: 8620548
    Abstract: Secure failure diagnosis of a brake switch is enabled with a simple configuration. Inconsistency detection is performed for output signals from two brake switches 6a and 6b provided such that an operation condition of a brake pedal 1 may be detected (S102), and when inconsistency is detected, after a certain time has passed from the relevant detection point, inconsistency detection is newly performed for output signals from the two brake switches 6a and 6b (S108), and when inconsistency is detected again, a determination counter performs count of a predetermined incremental value, those operation being periodically repeated (S110), and when a count value reaches a predetermined value ? after the determination counter performs the count, the two brake switches 6a and 6b are determined to be failed (S114 and S118).
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: December 31, 2013
    Assignee: Bosch Corporation
    Inventors: Masaki Shibasaki, Tetsuya Shinguchi, Takayuki Wakai, Masaaki Maeno
  • Patent number: 8380418
    Abstract: A disc braking system of a vehicle determines the actual temperature of a brake rotor. The disc braking system compares the actual temperature of the brake rotor to a critical temperature of the brake rotor. The critical temperature of the brake rotor is a temperature above which damage and/or warping to the brake rotor may occur. The disc braking system applies a corrective measure to prevent damage to the brake rotor when the actual temperature of the brake rotor is greater than the critical temperature of the brake rotor. The corrective measure may include, but is not limited to: displaying a warning, adjusting a fraction control system of the vehicle, scheduling maintenance for the vehicle.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: February 19, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Hong S. Bae, Mark N. Howell
  • Patent number: 8364370
    Abstract: When a target yaw moment Ms is computed, an estimated lateral acceleration GH and estimated deceleration GT of a host vehicle are determined beforehand according to target yaw moment Ms, and when the estimated lateral acceleration GH is smaller than a threshold preset on the basis of the estimated deceleration GT the target yaw moment Ms is corrected to a smaller limit value Msm.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: January 29, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takeshi Yonezawa, Kou Sato
  • Patent number: 8335625
    Abstract: A method and apparatus for rapidly causing a slip of a driving wheel to converge regardless of the change in vehicle conditions when the driving wheel is in a slip state. When a slip occurs on a driving wheel, a second driving force command value is calculated from a driving force control value controlled by driving force control means and an angular acceleration. The second driving force command value is calculated so that torque capable of being transmitted to a road surface by the driving wheel takes the maximum value. Therefore, even if the friction coefficient of road surface or the wheel load changes, the driving torque of driving wheel can be commanded properly, so that the slip can be converged rapidly. The occurrence of slip at the time of re-acceleration after slip convergence can be avoided.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: December 18, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Ichiro Yamaguchi, Yoshitaka Deguchi
  • Patent number: 8046137
    Abstract: Two data processing units having the same function, one of which is used for a master and the other for comparison, are provided, control of a circuit unit is performed by the master, the master data processing unit and the circuit unit are operated in synchronization with a first clock signal, the second data processing unit is operated in synchronization with a second clock signal having the same cycle and different phase from the first clock signal, and processing results of both the data processing units are compared in a comparison circuit. Flip flops are disposed on a signal path from the circuit unit to the comparison data processing unit and on a signal path from the master data processing unit to the comparator, and both the first and second clock signals are used for latch clocks of the flip flops in accordance with input signals thereof.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: October 25, 2011
    Assignee: Renesas Electronics Corporation
    Inventors: Hiromichi Yamada, Nobuyasu Kanekawa, Teruaki Sakata
  • Publication number: 20110054758
    Abstract: A disc braking system of a vehicle determines the actual temperature of a brake rotor. The disc braking system compares the actual temperature of the brake rotor to a critical temperature of the brake rotor. The critical temperature of the brake rotor is a temperature above which damage and/or warping to the brake rotor may occur. The disc braking system applies a corrective measure to prevent damage to the brake rotor when the actual temperature of the brake rotor is greater than the critical temperature of the brake rotor. The corrective measure may include, but is not limited to: displaying a warning, adjusting a fraction control system of the vehicle, scheduling maintenance for the vehicle.
    Type: Application
    Filed: August 26, 2009
    Publication date: March 3, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Hong S. Bae, Mark N. Howell
  • Patent number: 7890233
    Abstract: Two data processing units having the same function, one of which is used for a master and the other for comparison, are provided, control of a circuit unit is performed by the master, the master data processing unit and the circuit unit are operated in synchronization with a first clock signal, the second data processing unit is operated in synchronization with a second clock signal having the same cycle and different phase from the first clock signal, and processing results of both the data processing units are compared in a comparison circuit. Flip flops are disposed on a signal path from the circuit unit to the comparison data processing unit and on a signal path from the master data processing unit to the comparator, and both the first and second clock signals are used for latch clocks of the flip flops in accordance with input signals thereof.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: February 15, 2011
    Assignee: Renesas Electronics Corporation
    Inventors: Hiromichi Yamada, Nobuyasu Kanekawa, Teruaki Sakata
  • Patent number: 7835843
    Abstract: An ECU executes a program that includes a step of determining whether an output shaft rotation speed NOUT is equal to or greater than a reference rotation speed at which determining regions with all of the gear speeds in a stepped automatic transmission do not overlap, a step of determining that there is an abnormality in the gear speed by dividing the turbine rotation speed NT by the output shaft rotation speed NOUT if the output shaft rotation speed NOUT is not equal to or greater than that reference rotation speed, and a step of determining that there is an abnormality in the gear speed by subtracting a value, which is obtained by multiplying the output shaft rotation speed NOUT by the gear ratio, from the turbine rotation speed NT if the output shaft rotation speed NOUT is equal to or greater than that reference rotation speed.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: November 16, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tatsuya Kawamura, Toshio Sugimura, Hideo Masaki
  • Publication number: 20090099728
    Abstract: A collision avoiding control apparatus has a side acceleration command calculator unit for calculating a side acceleration command by judging whether an obstacle is to be avoided, by calculating a distance of the obstacle capable of being avoided, in accordance with a distance and width of the obstacle in front of a vehicle and a vehicle speed, and if it is judged that the obstacle is to be avoided, calculating a side acceleration necessary for a vehicle side motion amount to satisfy the width, in accordance with the distance and width and the vehicle speed, and a steering angle calculator unit for calculating in a predictable manner a vehicle steering angle from the side acceleration command calculated by the side acceleration command calculator unit.
    Type: Application
    Filed: October 15, 2008
    Publication date: April 16, 2009
    Applicant: Hitachi, Ltd.
    Inventors: Masanori ICHINOSE, Makoto YAMAKADO, Masato ABE
  • Patent number: 7415325
    Abstract: A method and apparatus for data interchange between a tractor vehicle and a trailer vehicle coupled thereto. A first electronic device provided in or on the tractor is connected via a data link to a second electronic device provided in or on the trailer; the first and second devices being connected to sensors and/or actuators for controlling operating functions of the vehicle allocated thereto and for measuring status information. Initiated by an information request, the first device sends request data via the data link to the second device. The first device receives status information via the data link sent by the second device in response to the request data. The first device outputs, in a manner that correlates with the trailer, the received status information by means of an output device disposed on or in the tractor. The same output scheme is used for both the tractor and trailer.
    Type: Grant
    Filed: April 1, 2005
    Date of Patent: August 19, 2008
    Assignee: WABCO GmbH & Co. OHG
    Inventors: Michael Knosmann, Gerhard Ruhnau, Matthias Radtke, Ulrich Weihe
  • Patent number: 7412318
    Abstract: System for detecting stability/instability of behavior of a motor vehicle upon occurrence of tire slip or lock. State of the motor vehicle is determined on the basis of an alignment torque (Ta) applied from a road and a side slip angle (?). By taking advantage of such torque/slip-angle characteristic that although the alignment torque is proportional to a side slip angle when the latter is small, the alignment torque becomes smaller as the side slip angle increases, a normal value is determined from a straight line slope and the side slip angle in a region where the latter is small. Unstable behavior of the motor vehicle is determined when deviation of actual measured value from the normal value increases. Further, unstable state is determined when the slope of the alignment torque for the slip angle departs significantly from that of approximate straight line slope.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: August 12, 2008
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Fujioka, Takanori Matsunaga, Takashi Maeda, Toshinori Matsui, Masahiko Kurishige, Hideyuki Tanaka
  • Patent number: 7236872
    Abstract: A speed sensor instability detection and correction system for use with a vehicle includes a speed sensor output variation extractor monitoring and recording change in output of a speed sensor over time. A speed sensor output variation comparison module detects speed sensor instability based on a comparison between the speed sensor output variation and a predetermined threshold. An output speed determination module selectively determines output speed in alternative ways based on whether speed sensor instability is detected.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: June 26, 2007
    Assignee: General Motors Corporation
    Inventor: Herve Scelers
  • Patent number: 7109853
    Abstract: A vehicle safety system automatically detects the presence of a person sealed in the trunk of an automobile by sensing the CO2 respiration of the person. Visible, audio and radio alarms are generated in response to the detection of a person in the trunk. If the vehicle is stopped, the trunk will automatically open and allow the person to escape.
    Type: Grant
    Filed: April 25, 2000
    Date of Patent: September 19, 2006
    Assignee: Cherry Corporation
    Inventors: Daniel J. Mattson, Kerry S. Berland, Kenneth C. Kunin
  • Patent number: 7096108
    Abstract: A brake system for a heavy vehicle includes a control network, a brake component, a central control unit, and a distributed electronic control unit. The central control unit generates central control signals adapted to control the brake component, which control signals are transmitted to the brake component over the control network. The distributed electronic control unit receives the central control signals, controls the brake component in accordance with the central control signals if the central control signals are received during expected time periods, and controls the brake component in accordance with an alternative control scheme if the central control signals are not received during the expected time periods.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: August 22, 2006
    Assignee: Haldex Brake Products AB
    Inventors: Peter Nilsson, Anders Lindqvist
  • Patent number: 7093536
    Abstract: A fault tolerant operating method for a cotton compactor of a cotton module builder or packager of a cotton harvesting machine, which serves as an alternative to shutting down the compacting process or erratic operation thereof, in the event of indication of a fault or failure condition involving one or more sensors associated with the compactor, or a conductive path in connection with a sensor, all generally identified as a fault or failure condition.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: August 22, 2006
    Assignee: CNH America LLC
    Inventors: Tracy R. Archer, Yun-Ren Ho, Kevin D. McKee, Kevin S. Richman
  • Patent number: 7080705
    Abstract: An electronically controlled compression ignition engine is connected with an advanced cruise control system. The advanced cruise control system is capable of measuring distance to a vehicle or other object in front of equipment that is power by the compression ignition engine. Signals produced by the advanced cruise control system, at least in part, are used to determine the power output of the engine. In the event that the electronically controlled engine receives no signals from the advanced cruise control system, the electronic control may disengage or disable the advanced cruise control.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: July 25, 2006
    Assignee: Caterpillar Inc.
    Inventors: James W. Landes, Scott E. Nicholson
  • Patent number: 6922624
    Abstract: It is checked based on entered information as to whether a vehicle should be decelerated or not (S106). When the vehicle should decelerate, an automatic brake operation is carried out with a braking force being set to be smaller by a predetermined ratio than an estimated maximum braking force estimated based on a road surface friction coefficient ?(S110).
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: July 26, 2005
    Assignee: Denso Corporation
    Inventors: Kazuyoshi Isaji, Naohiko Tsuru
  • Patent number: 6915203
    Abstract: An engine control system has a self-diagnosis function of an exhaust system. The self-diagnosis function includes a first mode for detecting a failure or abnormality of the exhaust system as a whole, and a second mode for determining and locating a specific failed component in the exhaust system. The first mode is executed during the engine is operated under a normal condition. Therefore it is possible to detect the failure of the exhaust system without lowering a drive performance or increasing emissions. In case of detecting any failure in the first mode, the second mode is activated in response to a command signal that can be entered via a service tool. In the second mode, the engine is operated in order to determine the failed component. In the second mode, determining the failed component takes priority over keeping the drive performance or reducing emissions.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: July 5, 2005
    Assignee: DENSO Corporation
    Inventors: Yoshinori Maegawa, Syujiro Morinaga, Hisashi Iida, Tatsuya Oka, Masakazu Yamada
  • Patent number: 6915241
    Abstract: A method, implemented on a computer having a fixed amount of memory and CPU resources, for analyzing a sequence of data units derived from a dynamic system to which new data units may be added by classifying the data units, is disclosed. The method comprises determining the similarity of the data units being part of the sequence of data units by calculating the distance between all pairs of data units in a data space. The method further comprises classifying the data units by assigning labels to the data units such that, if the distance of a data unit which is to be classified to any other data unit exceeds a threshold, a new label is assigned to the data unit to be classified. Also, if the threshold is not exceeded, the label of the data unit being closest to the data unit to be classified is assigned to the data unit to be classified.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: July 5, 2005
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Jens Kohlmorgen, Steven Lemm
  • Patent number: 6904991
    Abstract: A method and a device for stabilizing a vehicle having at least one wheel tending to spin, are provided. In response to the tendency to spin, a driver-independent braking intervention occurs in the at least one wheel. The engine torque is reduced if the driver-independent braking intervention has not resulted in stabilizing the vehicle.
    Type: Grant
    Filed: July 24, 2003
    Date of Patent: June 14, 2005
    Assignee: Robert Bosch GmbH
    Inventors: Guenter Barth, Frank Leibeling, Michael Kroehnert
  • Patent number: 6860351
    Abstract: An electronically controlled compression ignition engine is connected with an advanced cruise control system. The advanced cruise control system is capable of measuring distance to a vehicle or other object in front of equipment that is power by the compression ignition engine. Signals produced by the advanced cruise control system, at least in part, are used to determine the power output of the engine. In the event that the electronically controlled engine receives no signals from the advanced cruise control system, the electronic control may disengage or disable the advanced cruise control.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: March 1, 2005
    Assignee: Caterpillar Inc
    Inventors: James W. Landes, Scott E. Nicholson
  • Patent number: 6819980
    Abstract: In a method for the avoidance of rollover phenomena in semitrailers with the emission of warning signals for the driver of the vehicle when driving inappropriately, the center of gravity of the load of the semitrailer is calculated in an on-board computer. From the center of gravity thus determined and the known weight of the loaded semitrailer, the on-board computer calculates a rollover limit as a function of instantaneous driving parameters, on exceeding of which limit a warning is issued to the driver of the vehicle.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: November 16, 2004
    Assignee: DaimlerChrysler AG
    Inventors: Wolf-Deitrich Bauer, Christian Michael Mayer, Andreas Schwarzhaupt, Gernot Spiegelberg
  • Patent number: 6804564
    Abstract: A system for controlling and/or monitoring a control-unit group having at least two control units, a first control unit and at least one second control unit, the first control unit being designed for performing its control function and for monitoring this control function, as well as for monitoring the control function of the at least one second control unit.
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: October 12, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Norbert Crispin, Wolfgang Haas, Andreas Frank, Thomas Meier
  • Patent number: 6651004
    Abstract: A method and apparatus for directing a pursuing vehicle, such as a torpedo, on an intercept trajectory from a launching vehicle to a target vehicle with evasion capabilities. The guidance system bases a solution on vectors on a first Cartesian coordinate system. Evasive maneuvers for the target vehicle are based upon vectors on a second Cartesian coordinate system. The guidance system converts the evasive maneuver to the first coordinate system and then performs an iterative process using initial guidance parameter values to determine, upon convergence of the solutions, final guidance parameters for the target vehicle.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: November 18, 2003
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Joseph J. Perruzzi, Michael Dipaola, Edward J. Hillard
  • Patent number: 6606549
    Abstract: A drive-force distribution controller for a four-wheel-drive vehicle in which drive force produced by an engine is transmitted directly to front or rear wheels and is transmitted to the remaining wheels via a torque distribution clutch, and the engagement force of the torque distribution clutch is controlled in accordance with traveling conditions of the vehicle. The controller includes a calculation unit for calculating variation per unit time in rotational speed difference between the front wheels and the rear wheels; and a control unit for controlling the engagement force such that the engagement force increases as the variation per unit time in the rotational speed difference increases.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: August 12, 2003
    Assignee: Toyoda Koki Kabushiki Kaisha
    Inventors: Tsuyoshi Murakami, Ryohei Shigeta
  • Patent number: 6578648
    Abstract: Tandem drive axles include a pair of drive axles interconnected by a thru-shaft. An inter-axle differential allows speed differentiation between the pair of axles. Differences in tire rolling radii and variations in axle load distribution between the pair of drive axles are examples of why axle differentiation is needed. By measuring and monitoring wheel speed and/or tire pressure, tire rolling radii differences can be determined and appropriate adjustments can be made to tire pressures to provide a common tire rolling radii range for all tires. In addition to tire pressure adjustment, by adjusting other axle parameters that affect axle performance, such as suspension height and weight distribution, the need for axle differentiation is eliminated.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: June 17, 2003
    Assignee: Meritor Heavy Vehicle Technology, LLC
    Inventor: Dale K. Bell
  • Patent number: 6499552
    Abstract: Tandem drive axles include a pair of drive axles interconnected by a thru-shaft. An inter-axle differential allows speed differentiation between the pair of axles. Differences in tire rolling radii and variations in axle load distribution between the pair of drive axles are examples of why axle differentiation is needed. By measuring and monitoring wheel speed and/or tire pressure, tire rolling radii differences can be determined and appropriate adjustments can be made to tire pressures to provide a common tire rolling radii range for all tires. In addition to tire pressure adjustment, by adjusting other axle parameters that affect axle performance, such as suspension height and weight distribution, the need for axle differentiation is eliminated.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: December 31, 2002
    Assignee: Meritor Heavy Vehicle Technology, L.L.C.
    Inventor: Dale K. Bell
  • Patent number: 6434457
    Abstract: An apparatus for detecting abnormality of a vehicle sensor and a method are provided. The apparatus is capable of preventing erroneous detection of abnormalities of sensors. The apparatus has a grip degree detecting device for detecting grip degree of a wheel of the vehicle with respect to a road surface. In a case in which the grip degree is lower than a predetermined degree, detection for presence of an abnormality of a yaw rate sensor, a cross acceleration sensor and a steering angle sensor are prohibited.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: August 13, 2002
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki Kaisha, Denso Corporation
    Inventors: Toshinori Okita, Akira Tanaka, Yoshiyuki Yasui, Mamoru Sawada, Noboru Sugiura
  • Patent number: 6345225
    Abstract: This invention relates to an electromechanical brake system, in particular for automotive vehicles, which includes a pedal module and at least two brake modules. Further, a central module may be provided. Connection between the aforementioned modules can be made by a data bus. The data bus is provided redundantly. In one embodiment, the central module can evaluate signals of a sensor system and examine them for their errors. Further, the central module can emit a corresponding nominal braking value which then is emitted to the brake modules. Thereupon, the brake modules determine appropriate actuating signals for the actuators which interact with the wheels in order to realize the driver's braking intention.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: February 5, 2002
    Assignee: Continental Teves AG & Co., OHG
    Inventors: Jürgen Böhm, Stefan Stölzl, Peter Willimowski, Joachim Nell, Rainer Oehler
  • Publication number: 20010044688
    Abstract: An apparatus for detecting abnormality of a vehicle sensor and a method are provided. The apparatus is capable of preventing erroneous detection of abnormalities of sensors. The apparatus has a grip degree detecting device for detecting grip degree of a wheel of the vehicle with respect to a road surface. In a case in which the grip degree is lower than a predetermined degree, detection for presence of an abnormality of a yaw rate sensor, a cross acceleration sensor and a steering angle sensor are prohibited.
    Type: Application
    Filed: March 15, 2001
    Publication date: November 22, 2001
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Toshinori Okita, Akira Tanaka, Yoshiyuki Yasui, Mamoru Sawada, Noboru Sugiura
  • Patent number: 6292733
    Abstract: A vehicular brake controlling apparatus comprises: a brake unit to enable a suppression of boosting a braking liquid pressure independently of each wheel cylinder, each wheel cylinder operatively braking a corresponding one of vehicular front and rear road wheels according to the braking liquid pressure; a plurality of road wheel velocity sensors, each road wheel velocity sensor detecting a revolution velocity of the corresponding one of the road wheels and outputting a signal indicating the detected road wheel revolution velocity thereof; and a controller configured to be enabled to execute such a braking force distribution control function as to controllably operate the brake unit to suppress the boosting in the braking liquid pressure for the rear road wheels on the basis of a revolution velocity difference between the front and rear road wheels derived from the signals outputted from the respective road wheel velocity sensors when the revolution velocity difference is in excess of a predetermined start th
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: September 18, 2001
    Assignees: Unisia Jecs Corporation, Nissan Motor Co., Ltd.
    Inventors: Yoshitaka Sugiyama, Toru Kojima
  • Patent number: 6282484
    Abstract: There is provided a cruise control apparatus whose reliability can be improved by protecting the actuator from failing. A cruise control apparatus with a controller ECU capable of canceling the cruise control when the temperature data given by the actuator temperature estimation unit exceeds a predetermined value.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: August 28, 2001
    Assignees: Fuji Jukogyo Kabushiki Kaisha, Jidosha Denki Kogyo Kabushiki Kaisha
    Inventors: Keiichi Enomoto, Eisaku Hori, Satoru Hasegawa
  • Patent number: 6243629
    Abstract: An electronic control unit for an automotive vehicle which can be manufactured at a low cost and which is compact in size, includes a first microprocessor which has a first memory storing one of a plurality of arithmetic programs for controlling respective predetermined control systems, and which is connected to at least one external sensor and an actuator of a corresponding one of the predetermined control systems. The first microprocessor arithmetically processes information from the at least one external sensor based on the one of the plurality of predetermined arithmetic programs stored in the first memory, and delivers a control signal as a result of the arithmetic processing to the actuator. A second microprocessor is connected to the first microprocessor to deliver and receive data to and from the first microprocessor, thereby monitoring operation of the same.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: June 5, 2001
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yoshiyuki Sugimoto, Yusuke Takayama
  • Patent number: 6125321
    Abstract: A motor vehicle drive system controller is adapted to automatic drive control, the engine and the transmission being among the objects of control. The power output of the motor is controlled so as to maintain either a consistent drivable mode or a consistent undrivable mode as the automatic transmission shifts gears while the vehicle is running under automatic drive control. The consistent drivable mode refers to a state where the output torque of the motor is greater than the sum of the average running resistance and the variation in the running resistance and the consistent undrivable mode refers to a state where the output torque of the motor is smaller than the difference of the average running resistance and the variation in the running resistance. The automatic drive control function is prohibited when the controller detects abnormality in the transmission.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: September 26, 2000
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Atsushi Tabata, Kagenori Fukumura, Yasunari Nakamura, Hideo Tomomatsu, Hiroji Taniguchi
  • Patent number: 5884207
    Abstract: The present invention describes a process for a vehicle including an electronic control system, which processes input signals representative of the rotational behavior of the individual wheels, and wherein the differences of the tire tread circumferences of the individual wheels are determined by way of short-time and long-time correction factors. The long-time correction factors LZ.sub.n. are determined from the differences D.sub.R1 between the short-time correction factors KZ.sub.R1 and the long-time correction factors LZ.sub.R1 of the respective wheel by averaging LM.sub.r1 the differences during a predetermined time interval and by evaluating and weighting the average value. For the quick identification of an emergency wheel, every time the vehicle engine is started, the long-time factor LZ.sub.R1 is equalled once to the short-time factor KZ.sub.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: March 16, 1999
    Assignee: ITT Manufacturing Enterprises Inc.
    Inventors: Dieter Burkhard, Manfred Dornseiff, Jean-Claude Schwartz
  • Patent number: 5867803
    Abstract: A traction control apparatus is provided with a control factor calculation section for determining current slip values of the driving wheels, differential values of the wheel slips, a value of the vehicle speed, values of longitudinal acceleration and jerk resulting therefrom and values of centripetal acceleration and jerk resulting therefrom, a running condition and road surface decision section for determining a desired engine torque value and gain coefficients for controlling the engine torque values, a degree of unsafety allowable, gain coefficients for controlling the degree of unsafety by using the values determined by the control factor calculation section and the values outputted from the PD controlling section, an acceleration performance enhancing section for determining a first desired opening angle of a throttle valve by using the desired engine torque, the gain coefficients for controlling the engine torque and the values determined by the control factor calculation section, a driving safety secu
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: February 2, 1999
    Assignee: Mando Machinery Corp.
    Inventors: Keon Kim, Jun-Nam Oh, Pyung-Seok Park, Hwi-Seop Kim, Pyung-Sang Lee, Je-Hyung Lee
  • Patent number: 5802491
    Abstract: A control system for motor vehicles in which the errors in wheel velocities created by tolerances between the tires are compensated.
    Type: Grant
    Filed: September 11, 1995
    Date of Patent: September 1, 1998
    Assignee: Robert Bosch GmbH
    Inventors: Gerd Bush, Thomas Ehret, Fredrich Kost, Karl-Josef Weiss
  • Patent number: 5792968
    Abstract: A method of an accurate detection of a spinning vehicle wheel. Observed wheel speeds are derived by measuring the speed of each wheel and the slowest speed is set as the slowest observed wheel speed. A maximum probable wheel speed is derived by multiplying the slowest observed wheel speed by the ratio of the maximum wheel speed to the slowest wheel speed for a given minimum turning radius. The maximum probable wheel speed is compared with an observed wheel speed and if the observed wheel speed is greater, the wheel is deemed to be spinning.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: August 11, 1998
    Assignee: Nisshinbo Industries Inc.
    Inventors: Noriyuki Takemasa, Keiji Toyoda, Wataru Ozawa, Susumu Yamada, Hiroshi Oshiro
  • Patent number: 5754963
    Abstract: A sensor failure and detection apparatus and method for use in a redundant sensor system are disclosed. A control circuit disconnects reference power supplied to a sensor and then monitors the voltage decay output by the sensor. The monitored rate of voltage decay of the sensor is compared to the expected natural voltage decay of the sensor to detect failures caused by short or open circuits. An error counter keeps track of the number of failures. After a threshold number of times in which the monitored voltage decay does not compare to a predicted rate of decay, power to the sensor is removed and the sensor is isolated from the system.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: May 19, 1998
    Assignee: Hitachi America, Ltd.
    Inventors: John Nunneley, Hayato Sugawara