Vehicle Shaker Patents (Class 73/669)
  • Patent number: 11029235
    Abstract: A tire testing assembly adapted to provide precise displacements and simulate slow rate conditions, the tire testing assembly including: a support structure adapted to be coupled to a tire under test; a ground plane adapted to contact the tire under test and simulate a ground or road surface; and a lateral translation mechanism movably coupled between the support structure and the tire under test and adapted to translate the tire under test laterally relative to the ground plane. The tire testing assembly also includes a steering frame pivotably coupled between the support structure and the tire under test and adapted to pivot the tire under test about a steer axis of rotation relative to the ground plane. The tire testing assembly further includes a longitudinal translation mechanism movably coupled between the support structure and the tire under test and adapted to translate the tire under test longitudinally relative to the ground plane.
    Type: Grant
    Filed: February 21, 2019
    Date of Patent: June 8, 2021
    Assignee: Link Engineering Company
    Inventor: James F. Cuttino
  • Patent number: 10976216
    Abstract: A vehicle test apparatus is provided. The vehicle test apparatus may include a pair of support members and a pair of lateral translation assemblies. Each support member defines a central axis. Each assembly of the pair of lateral translation assemblies may be mounted to an upper end of one of the pair of support members. Each assembly of the pair of lateral translation assemblies may include a front wheelpan mounted to one of the pair of support members for lateral movement relative to a respective central axis. Each assembly of the pair of lateral translation assemblies may further include a hydraulic cylinder arranged with a respective front wheelpan to direct lateral movement thereof.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: April 13, 2021
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventor: Michael Geist
  • Patent number: 10259005
    Abstract: A workpiece carrier includes a base frame, a fixture base, a plurality of locators, and a drive source. The fixture base is secured to the base frame. Each of the plurality of locators is secured at a first end to the fixture base and at a second end to a workpiece. The drive source is in communication with the fixture base for rotationally driving the fixture base with respect to the base frame.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: April 16, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Hua-tzu Fan, Jorge Arinez
  • Patent number: 10053333
    Abstract: A platform lift configured for supporting the movement of items between a floor-level area and an elevated area includes a rigid, floor-level platform with two opposed sides, an above-floor mast arranged at each of the opposed sides of the platform, and a knuckle assembly coupling each mast to its respective side of the platform. The masts together support the platform for movement in a lifting direction normal to the platform, and each include an actuator coupled to its respective side of the platform that is selectively operable to impart lifting movement thereto in the lifting direction. The knuckle assemblies together permit the platform's rotation towards and away from the masts when their respective actuators impart different amounts of lifting movement to the opposed sides of the platform in the lifting direction.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: August 21, 2018
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Keith J. Wells, Robert D. McClain
  • Patent number: 9885638
    Abstract: Methods and apparatus are provided for determining steering performance. The method includes coupling at least one load source to the steering system, and coupling a portion of the steering system to an angle input source. The method also includes outputting one or more control signals by a processor to the at least one load source to apply a load to the steering system and outputting one or more control signals by the processor to the angle input source to apply an input to the steering system. The method includes receiving torque data indicating a performance of the steering system based on the load applied to the steering system by the at least one load source and the input applied by the angle input source.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: February 6, 2018
    Assignee: GM Global Technology Operations LLC
    Inventors: Kenneth L. Oblizajek, John D. Sopoci, Ian Y. Hwa
  • Patent number: 9880066
    Abstract: An ideal multi-axis transducer will respond properly to forces and moments that are applied in intermediate directions. The transducer calibration apparatus described herein can detect transducers that have incorrect off-axes response. One calibration apparatus includes a base, a pair of end stanchions fixed on the base, force actuators mounted between the base, the pair of end stanchions, and a transducer holder, the force actuators arranged to exert forces and moments on a transducer mounted in the transducer holder, and force reaction sensors fixed between the base, the pair of end stanchions, and the transducer holder for measuring forces and moments experienced by the transducer holder.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: January 30, 2018
    Assignee: Michigan Scientific Corporation
    Inventors: Hugh Larsen, Scott K. Rhudy, Ryan F. Giem, Adam B. Manninen, Joel Schnackenberg, John L. Cancilla, Ralph W. Larsen
  • Patent number: 9835518
    Abstract: A vibration test jig may include an upper jig frame to which a vibration test object is fixed and a lower base frame mounted to an oscillator, and a plurality of double parallelograms connected between the jig frame and the base frame, for generating displacements in an upward/downward direction and/or a forward/rearward direction. Each of the double parallelograms may include a complex four-articulation link structure and a wire rope isolator. The vibration test jig can simulate a deformation mode due to generation of resonances.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: December 5, 2017
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Inalfa Roof Systems Group B.V.
    Inventors: Kyung Wook Baek, Dae Jin Kim, Hwa Kyong Sung, Joo Hoon Lim
  • Patent number: 8984947
    Abstract: A method of reproducing abnormal noise comprises: a step of starting an engine while buffer suppressing members for suppressing the buffer function of an engine mount are mounted on the engine mount which buffer-mounts on a vehicle body an engine for driving a vehicle and a shift lever for driving is maintained in a neutral position; and a step of opening and closing the accelerator of the engine while the shift lever for driving is maintained in a neutral position. In the method of reproducing abnormal noise, jigs are used.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: March 24, 2015
    Assignee: Honda Motor Co., Ltd.
    Inventor: Akihiro Usui
  • Patent number: 8966987
    Abstract: The disclosed embodiments include a test stand (100) for the simulation of forces and moments introduced into a motor vehicle or into parts of a motor vehicle during driving operation. In order to allow a simulation of road journeys which is as realistic as possible, it being possible at the same time to dispense with vehicle-specific excitation or activation signals, there is provision, according to the invention, whereby the test stand (100) has at least one wheel contact plate (2) for receiving a vehicle wheel (1) and at least one first actuator (3a, 3b) connected at one side to the foundation (101) of the test stand (100) and at the other side to the wheel contact plate (2), for moving the wheel contact plate (2) along a first axis (L1), preferably along the vertical axis, relative to the foundation (101) of the test stand (100).
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: March 3, 2015
    Assignee: Illinois Tool Works Inc.
    Inventors: Alfred Clusserath, Manfred Backer, Riccardo Moller
  • Patent number: 8844345
    Abstract: An apparatus imparts motion to a test object such as a motor vehicle in a controlled fashion. A base has mounted on it a linear electromagnetic motor having a first end and a second end, the first end being connected to the base. A pneumatic cylinder and piston combination have a first end and a second end, the first end connected to the base so that the pneumatic cylinder and piston combination is generally parallel with the linear electromagnetic motor. The second ends of the linear electromagnetic motor and pneumatic cylinder and piston combination being commonly linked to a mount for the test object. A control system for the linear electromagnetic motor and pneumatic cylinder and piston combination drives the pneumatic cylinder and piston combination to support a substantial static load of the test object and the linear electromagnetic motor to impart controlled motion to the test object.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: September 30, 2014
    Assignees: Roehrig Engineering, Inc., Virginia Tech Intellectual Properties, Inc.
    Inventors: Stephen C. Southward, Chandler Reubush, Bryan Pittman, Kurt Roehrig, Doug Gerard
  • Publication number: 20130205905
    Abstract: A system for detecting rattles, squeaks and other annoying sounds in a vehicle can include a vibration generator and a clamping device configured to attach to the vehicle.
    Type: Application
    Filed: January 12, 2013
    Publication date: August 15, 2013
    Inventor: Dustin Joiner
  • Patent number: 8452552
    Abstract: A method for checking a vibration damper of a motor vehicle in the installed state includes setting start values of the damping constant kA, the spring rate cA, and the body mass mA for a wheel of a motor vehicle; inducing a vertical vibration of the motor vehicle with the aid of a defined excitation sRreal; determining the theoretical body vibration excursion sAmodel; optically detecting the positions of the wheel and the body shell of the motor vehicle at a plurality of detection instants during the vibration; minimizing the error function formed from the deviations between the theoretical body vibration excursion sAmodel and the observed body vibration excursion sAreal at the detection instants, and determining the damping constant kA, the spring rate cA, and the body mass mA therefrom; and determining the damping measure ? of the vibration damper.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: May 28, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Guenter Nobis, Daniel Wegener, Steffen Abraham
  • Patent number: 7971486
    Abstract: The invention is an apparatus and a method for carrying out a vibroacoustic inspection of a motor vehicle that features at least a front and a rear axle, with a test stand that is directly or indirectly connected to at least one of the two axles by means of a force flow and relative to which the motor vehicle is tied, wherein at least one vibration generator of a first type is provided along the force flow in order to generate vibrations below 50 Hz. The invention includes at least one second vibration generator of a second type, which is provided along the at least one force flow or parallel to the force flow, for generating vibrations above 30 Hz, preferably above 100 Hz, and the at least one second vibration generator is operatively connected to the motor vehicle.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: July 5, 2011
    Assignee: Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung E.V.
    Inventors: Tobias Melz, Michael Matthias, Holger Hanselka
  • Patent number: 7921713
    Abstract: A test fixture for testing a motor vehicle suspension, brake components and wheel components on a motor vehicle sub-frame is provided. The test fixture can include a lower frame attached to a base surface and be dimensioned for the motor vehicle sub-frame to be attached thereto. An upper frame oppositely disposed to the lower frame and dimensioned to attach to the sub-frame is also included. A shaker system is attached to the base surface and is operable to provide a predetermined vertical displacement profile to the sub-frame. A motor is attached to an axle assembly on the sub-frame and is operable to rotate a wheel component at a predetermined rate of rotation. A non-contact gap sensor is included and can be attached to the sub-frame and detect or monitor movement between a first sub-frame component and a second sub-frame component.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: April 12, 2011
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Jeff Alan Czoka, Tom Edward Stubblefield
  • Patent number: 7715949
    Abstract: A vibration reducing device that reduces the vibration of a control object includes a digital controller. A vibration state detection device detects the vibration of the control object and generates an analog signal of the vibration of the control object. An input-side bandpass filter has a passband that is narrower than a frequency range from a Nyquist frequency to a sampling frequency of the digital controller, and that contains no frequencies that are an integer multiple of the Nyquist frequency of the digital controller. The input-side bandpass filter allows a part of the analog signal that falls within the passband from the analog signal generated by the vibration state detection device to pass. An A/D conversion device converts the analog signal that has passed through the input-side bandpass filter into a digital signal.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: May 11, 2010
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yusuke Sato, Yoshimi Nunome, Kazuhiro Fujikane
  • Patent number: 7681454
    Abstract: A device (10, 10?) for checking the play of linkages of vehicles is provided and can include a first device (20) for production of oscillations, which is connected, via an extension element (30), with a contact element (40) for contacting the device (10, 10?) with the component to be tested, and a second device (50) for recording the oscillations produced in the component to be tested. A process for testing the play of vehicle linkages is also provided and can include the steps of producing oscillations with a first device (20), the oscillations being transmitted to a component to be measured via a contact element (40) which is connected via an extension element (30) with the first device (20), and recording the oscillations produced in the component to be measured with a second device (50).
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: March 23, 2010
    Inventor: Werner Rogg
  • Patent number: 7628077
    Abstract: A vehicle excitation testing system and method can include a device for simulating a vehicular motion and vehicular vibration and then measuring response. The system is designed to test front and/or rear wheel sections of a vehicle. The testing system can include a vehicle suspension system including a wheel and chassis, an excitation actuator connected to the suspension system, and a dummy or a real vehicle body linked to the suspension system and having a frame. The frame can be positively attached to the ground surface or floor or other similar isolated and stable base surface. Measuring devices can be connected to the frame, suspension and/or wheels. When the vehicle is excited to simulate road and other conditions, the wheels, suspension system and the vehicle body vibrate. Measurement of these transmitted vibrations can be studied in order to determine how to best control unwanted or unnecessary vibrations in the vehicle.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: December 8, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Jinghong Yu, Brian Brickner, Brian Nutwell, Charles Edward Hildreth
  • Patent number: 7540195
    Abstract: An electro-shaker vehicle test stand for vehicle evaluation includes a support frame, an electro-shaker mechanism and an interconnecting lever arm. The lever arm has an adjustable length. The test stand includes a spring table having a spring table plate and a spring table frame that is parallel to and spaced a predetermined distance below the spring table plate, a guide rod having a lower end attached to the spring table frame and an upper end attached to the spring table plate and a spring having an upper end attached to the frame and a lower end attached to the spring table frame. Activation of the electro-shaker mechanism induces an oscillatory movement of the spring in a vertical direction so that the spring table and vehicle are correspondingly displaced in a vertical direction.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: June 2, 2009
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Scott J. Nelsen, Stephen L. Robertson, Graham J. Fotheringham, George J. Vankaam
  • Publication number: 20090000385
    Abstract: A vehicle excitation testing system and method can include a device for simulating a vehicular motion and vehicular vibration and then measuring response. The system is designed to test front and/or rear wheel sections of a vehicle. The testing system can include a vehicle suspension system including a wheel and chassis, an excitation actuator connected to the suspension system, and a dummy or a real vehicle body linked to the suspension system and having a frame. The frame can be positively attached to the ground surface or floor or other similar isolated and stable base surface. Measuring devices can be connected to the frame, suspension and/or wheels. When the vehicle is excited to simulate road and other conditions, the wheels, suspension system and the vehicle body vibrate. Measurement of these transmitted vibrations can be studied in order to determine how to best control unwanted or unnecessary vibrations in the vehicle.
    Type: Application
    Filed: June 27, 2007
    Publication date: January 1, 2009
    Inventors: Jinghong Yu, Brian Brickner, Brian Nutwell, Charles Edward Hildreth
  • Patent number: 7461556
    Abstract: An apparatus for testing a vehicle. The apparatus includes an actuator and a stand assembly supported by the actuator. The stand assembly includes a coupling device configured to attach to a vehicle, and the actuator is configured to move the vehicle in response to a computer-generated signal.
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: December 9, 2008
    Assignee: Chip Ganassi Racing Teams, Inc.
    Inventor: James Hamilton
  • Publication number: 20080229836
    Abstract: The invention is an apparatus and a method for carrying out a vibroacoustic inspection of a motor vehicle that features at least a front and a rear axle, with a test stand that is directly or indirectly connected to at least one of the two axles by means of a force flow and relative to which the motor vehicle is tied, wherein at least one vibration generator of a first type is provided along said force flow in order to generate vibrations below 50 Hz. The invention includes at least one second vibration generator of a second type, which provided along the at least one force flow or parallel to the force flow, for generating vibrations above 30 Hz, preferably above 100 Hz, and the at least one second vibration generator is operatively connected to the motor vehicle.
    Type: Application
    Filed: April 27, 2006
    Publication date: September 25, 2008
    Inventors: Tobias Melz, Michael Matthias, Holger Hanselka
  • Patent number: 7401520
    Abstract: A vehicle testing system includes a wheel plate constructed and arranged to support a vehicle wheel. A linear electromagnetic actuator has a moving magnet mechanically coupled to the wheel plate constructed and arranged to impart a controlled substantially vertical force to the wheel plate. A spring may be mechanically coupled to the wheel plate to support at least a portion of a static mass of the vehicle.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: July 22, 2008
    Assignee: Bose Corporation
    Inventor: James A. Parison
  • Publication number: 20080078250
    Abstract: An electro-shaker vehicle test stand for vehicle evaluation includes a support frame, an electro-shaker mechanism and an interconnecting lever arm. The lever arm has an adjustable length. The test stand includes a spring table having a spring table plate and a spring table frame that is parallel to and spaced a predetermined distance below the spring table plate, a guide rod having a lower end attached to the spring table frame and an upper end attached to the spring table plate and a spring having an upper end attached to the frame and a lower end attached to the spring table frame. Activation of the electro-shaker mechanism induces an oscillatory movement of the spring in a vertical direction so that the spring table and vehicle are correspondingly displaced in a vertical direction.
    Type: Application
    Filed: September 25, 2006
    Publication date: April 3, 2008
    Applicant: Toyota Engineering & Manufacturing North America, Inc.
    Inventors: Scott J. Nelsen, Stephen L. Robertson, Graham J. Fotheringham, George J. Vankaam
  • Patent number: 7328622
    Abstract: Soft support systems and methods for dynamically testing structures are disclosed. In one embodiment, a soft support system adapted to decouple a structure from a support surface for dynamic testing includes a containment bag, an inflatable chamber disposed at least partially within the containment bag and adapted to engage with a portion of the structure, the inflatable chamber being further adapted to exert a lifting force on the portion of the structure during inflation of the inflatable chamber, and an inflator module coupled to the inflatable chamber and adapted to facilitate inflation of the inflatable chamber within the containment bag. In one embodiment, the inflatable chamber comprises a toroidally-shaped inflatable member defining a central opening adapted to at least partially receive a portion of the structure during inflation of the inflatable chamber.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: February 12, 2008
    Assignee: The Boeing Company
    Inventor: Gary C. Foss
  • Patent number: 7302825
    Abstract: A suspension testing or demonstrating apparatus includes a first section of track having a first undulation that displaces a wheel of the vehicle by a first predetermined amount when the wheel traverses at least a portion of the first undulation. A second section of track is positioned proximate to the first section of track such that the wheel traverses the second section of track after traversing the first section of track. The second section of track includes a second undulation that displaces the wheel of the vehicle by a second predetermined amount when the wheel traverses at least a portion of the second undulation.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: December 4, 2007
    Assignee: Bose Corporation
    Inventor: Lawrence D. Knox
  • Patent number: 7278316
    Abstract: A rough road drive simulation apparatus for testing a vehicle motion control system includes a real-time simulator. The real time simulator simulates a rough road driving state by entering, into a vehicle model representing a vehicle equipped with the vehicle motion control system, a wheel disturbance input based on a correlation between a road surface disturbance and a wheel rotation variation.
    Type: Grant
    Filed: May 26, 2005
    Date of Patent: October 9, 2007
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Osamu Satou, Syuuichi Nakagawa, Hiroshi Murakami, Haruki Saitou
  • Patent number: 7194888
    Abstract: A method of vehicle suspension testing includes conducting actual road testing of a vehicle including collecting data, and generating a drive file from the collected data for road test simulation. A vehicle suspension parameter is changed to result in a changed vehicle. Initial simulated road testing of the changed vehicle is conducted using the drive file, and results from the simulated and actual road testing are compared using acceptability criteria to determine whether to conduct further actual road testing of the changed vehicle before conducting further simulated road testing of the changed vehicle in response to the changed suspension parameter. Further simulated road testing of the changed vehicle is conducted if the acceptability criteria are met. Otherwise, further actual road testing of the changed vehicle is first conducted to develop a new drive file for use with additional simulated road testing of the changed vehicle.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: March 27, 2007
    Assignee: DaimlerChrysler Corporation
    Inventors: Mikhail Temkin, Ryan A Vaughan, Yung-Li Lee
  • Patent number: 7146859
    Abstract: In a method for simulation and assessment of the life or dynamic strength of components of a vehicle, the vehicle is subdivided into individual components and these components are modeled by means of a finite element method. The finite element models of the individual components are collated for simulation at interfaces. Externally introduced forces are measured on the vehicle, or are simulated, and the forces which occur at the interfaces or at specific points within the components are calculated in order to determine the weakest points from the dynamic strength point of view in the overall model. Elastic structures are modeled at the interfaces in order to simulate the real flexibility or the dynamic transmission response of the vehicle structure, and masses and/or stiffness data and/or elastomer bearing data for the elastic structures are taken into account in the model.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: December 12, 2006
    Assignee: DaimlerChrysler AG
    Inventors: Klaus-Joerg Dittmann, Erich Neuwirth
  • Patent number: 7058488
    Abstract: A vehicle testing apparatus for subjecting a vehicle to a compound force includes a support disposed in a plane for supporting the vehicle, and a mechanism coupled to the support for moving the support along at least one of three perpendicular axes. The mechanism subjects the vehicle to the compound force resulting from simultaneous movements along any combination of the axes. The mechanism includes a first platform constrained for rectilinear movement along a first axis, and a second platform constrained for rectilinear movement along a second axis, with the support preferably also being movable along a third axis. The support preferably also includes actively or passively controlled contact surfaces in all three axes with an optional trip mechanism. In addition, a first actuating device is preferably coupled to the first platform and a second actuating device is preferably coupled to the second platform.
    Type: Grant
    Filed: May 2, 2003
    Date of Patent: June 6, 2006
    Assignee: Burke E. Porter Machinery Company
    Inventors: Kevin Kemp, Hamid Alper Oral, Mark Hoenke
  • Patent number: 6640638
    Abstract: A loading assembly used in a vehicle spindle test fixture includes a wheel adapter housing that is mountable to a vehicle spindle. A pair of vertical struts are provided. Each vertical strut is joined to the wheel adapter housing at spaced-apart first pivot connections. A bell crank is coupled to each end of the vertical struts at spaced-apart second pivot connections. An actuator is pivotally coupled to the bell crank at a third pivot connection. The location of the second pivot connections relative to the third pivot connection approximates the location of the first pivot connections relative to the spindle axis.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: November 4, 2003
    Assignee: MTS Systems Corporation
    Inventors: Steven R. Haeg, Ricky L. Zieman, Glen C. Grenier, Chad E. Brose
  • Patent number: 6637271
    Abstract: The present invention provides a method and apparatus for identifying and eliminating vibration in a hydraulic clutch actuator. The vibration is identified by using transducers to characterize the vibrational characteristics of a power train of a vehicle. That characterization is used to program a shaker on a test bed to replicate the vibrations on the vehicle in a hydraulic clutch actuator. Different hydraulic dampers may be employed to eliminate the vibration. The preferred apparatus of the present invention includes a two piece hydraulic damper which may be opened as to insert different diaphragms for testing.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: October 28, 2003
    Assignee: Automotive Products (USA) Inc.
    Inventors: Arlan Vennefron, Jiamu Hu
  • Publication number: 20020144553
    Abstract: A sensor is disclosed specifically for detecting stress waves for use in a stress wave analysis system. The stress waves are preferably detected in a narrow frequency range of 35-40 KHz. At this range, stress waves from friction and impact sources typically propagate through machine structures at detectable amplitudes. In order to maximize the signal to noise ratio of stress waves, relative to background noise and vibration, the sensor of the present invention is designed and calibrated with a frequency response and damping features that are specifically tailored for stress wave analysis.
    Type: Application
    Filed: June 20, 2002
    Publication date: October 10, 2002
    Inventor: David B. Board
  • Patent number: 6257055
    Abstract: A loading assembly used in a vehicle spindle text fixture to apply a lateral force parallel to a spindle axis of a vehicle spindle includes a support frame and a wheel adapter housing mountable to the vehicle spindle. A pair of vertical struts are pivotally joined to the wheel adapter housing. A first actuator is operably coupled to the vertical struts to apply a force along a vertical axis substantially perpendicular to the spindle axis and substantially perpendicular to a longitudinal axis of the vehicle. A pair of lateral struts are provided. Each lateral strut is pivotally joined to one of the vertical struts. A second actuator is operably coupled to the lateral struts to apply a lateral force.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: July 10, 2001
    Assignee: MTS Systems Corporation
    Inventors: Steven R. Haeg, Ricky L. Zieman
  • Patent number: 6116091
    Abstract: The recreation of vibration levels at certain points in a stationary vehicle interior that are representative of realistic road conditions are achieved using road measurements in conjunction with a technique known as "reciprocal filtering." The reciprocal filtering technique consists of using an inverse transfer function, or impulse response in the time domain, between an excitation transducer and an accelerometer to calculate the excitation signal needed to recreate the vibrations measured on the road when squeak and rattle are present in a component of the vehicle. A set of excitation signals may be recorded for each component in the vehicle which is suspected of producing squeak and rattle noise. When a complaint is made that a vehicle is producing squeak and rattle, a service technician may reproduce noise by inducing vibrations through a kit having a CD player, an amplifier, a bass shaker and a CD with the set of excitation signals stored on separate tracks thereof.
    Type: Grant
    Filed: July 8, 1998
    Date of Patent: September 12, 2000
    Assignee: Ford Global Technologies, Inc.
    Inventors: Vy Tran, Bill Covitz, Gary Boes, Keng D. Hsueh, Andrew Phillips, Christopher Robert Fuller, Francois Charette
  • Patent number: 6035720
    Abstract: A method for simulating an impression which is perceived subjectively by an occupant of a vehicle, in particular of a passenger car, when the vehicle is being operated, as well as a device, for example, for carrying out such a method are provided. In the method, the primary oscillations which are produced when a vehicle to be investigated is being operated and which are perceived subjectively are registered. Data for generating secondary oscillations are acquired from the primary oscillations and are converted into the secondary oscillations, and a simulation unit, which simulates, among other things, in particular a passenger car representationally at least in certain areas, is operated. In the simulation unit which is elastically mounted or secured with respect to the floor, vibration oscillations, which are acquired from the primary oscillations, are induced at a location from which they are transmitted into a seat and/or into the steering wheel.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: March 14, 2000
    Assignee: DaimlerChrysler AG
    Inventors: Werner Podszun, Klaus Genuit
  • Patent number: 5942673
    Abstract: A vehicle testing system for simulating a vehicular motion and vehicular vibration caused thereby is provided to test a front or rear wheel section of a four-wheel vehicle. The testing system comprises a vehicle suspension system, a wheel attached thereto, a first actuator for exciting the wheel based on data concerning road and other conditions, and a dummy vehicle body linked to the suspension system and having a frame, a reaction measuring device linked to the frame and a second actuator for exciting the frame. When the wheel is excited corresponding to the data on road and other conditions, the suspension system and the dummy body vibrate. The reaction force generated by the suspension system is measured by the reaction measuring device.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: August 24, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Toshihiko Horiuchi, Takao Konno, Toshiyuki Innami
  • Patent number: 5700951
    Abstract: A testing apparatus of a steering system is provided to correctly detect load in a direction in which steering reaction force acts, the load being applied to the steering system. A tie rod connected to a rack of the steering system is connected to a steering-angle vibrating unit via a torque lever, relay links and a drive link. A front link of the drive link and a link disposed parallel to the torque lever are provided in a swingable manner. Both ends of each of the relay links are respectively connected to the torque lever and the link disposed parallel to the torque lever, and the torque lever is swingable with respect to the link in a direction in which road-surface reaction force acts. Transducers are provided at intermediate portions of the relay links, respectively. A vertically-vibrating unit is connected via the torque lever to the rack.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: December 23, 1997
    Assignees: Toyota Jidosha Kabushiki Kaisha, Kabushiki Kaisha Saginomiya Seisakusho
    Inventors: Tatsuya Sagiyama, Fumihiko Baba, Kaname Saito, Takashi Matsushima, Hitoshi Iizuka
  • Patent number: 5701257
    Abstract: A shock measuring method for detects shocks during transportation by a sensor and stores such detected shock data. The shock measuring method in goods transportation being characterized in that measuring conditions 1, 2, . . . n whose sequential order is pre-established are progressively fed in accordance with the sequential order for each transportation section, and shock data for each transportation section measured under each measuring condition 1, 2, . . . n for each transportation section are stored in accordance with the sequential order.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: December 23, 1997
    Assignee: Yamaichi Electronics Co., Ltd.
    Inventors: Shinsuke Miura, Takeshi Itoi, Shuichi Yabushita
  • Patent number: 5665901
    Abstract: At least one adjustable drive unit for a wheel support which can be set in oscillation, and electronic units which measure and evaluate the oscillating movement of the suspended vehicle with the following process steps:Acceleration of the wheel support by the drive unit to an oscillation measurement point A in an oscillation range above the resonance frequency of the wheel, and maintenance of the wheel support in this oscillating condition, until at measurement point B, the wheel has matched the oscillations of the wheel support with sufficient accuracy;A delayed reduction of the oscillation frequency with simultaneous measurement and storage of the oscillation amplitude to a reverse oscillation frequency at measurement point C, at which, during the reduction of the oscillation frequency, the oscillation amplitude has fallen below a first limit value which is considered an indicator of the faded, or decayed, resonance frequency;An increase in the oscillation frequency with simultaneous measurement and storage
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: September 9, 1997
    Assignee: Fichtel & Sachs AG
    Inventors: Frank Ilzig, Norbert Omlor
  • Patent number: 5633464
    Abstract: A loading assembly for a vehicle spindle test fixture includes a belt crank that pivots on a first axis to differentially displace two vertical struts which are attached to a wheel adapter housing in order to apply a braking moment to the vehicle spindle. A lever pivotally supported about a second axis is pivotally joined to the bell crank and is used to displace the bell crank, the vertical struts and the wheel adapter housing to apply a vertical force. A control link controls rotation of the bell crank about the first axis and is pivotally joined to the bell crank about a third axis. A second lever is pivotally supported for movement about the second axis and is pivotally joined to an end of the control link about a fourth axis. When a trailing arm suspension is to be tested, the bell crank, the first lever, the control link and the second lever are arranged to form a non-parallelogram linkage in order to induce a brake axis rotation when a vertical displacement is applied.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: May 27, 1997
    Assignee: MTS Systems Corporation
    Inventors: Steven R. Haeg, Paul J. Leska, Sr., Ricky L. Zieman, Joseph W. Daley
  • Patent number: 5618995
    Abstract: A vehicle vibration simulator to simulate occupant exposure to vibration in a motor vehicle includes a reaction mass, a seat portion, a seat actuator between the reaction mass and the seat portion for providing at least one degree of vibration freedom, a steering column portion, a steering column actuator between the reaction mass and the steering column portion for providing at least one degree of vibration freedom, a floorpan portion, a floorpan actuator between the reaction mass and the floorpan portion for providing one degree of vibration freedom, the seat actuator, steering column actuator and floorpan actuator being actuated independently and/or simultaneously to simulate occupant exposure to vehicle vibration.
    Type: Grant
    Filed: July 5, 1995
    Date of Patent: April 8, 1997
    Assignee: Ford Motor Company
    Inventors: Norman C. Otto, William J. Pielemeier, Raymond C. Meier, Jr.
  • Patent number: 5610330
    Abstract: A method for testing an automotive vehicle on a vehicle spindle-coupled simulator comprises the steps of driving a first vehicle over a test road surface, collecting spindle dynamics data from at least one spindle of said first vehicle, developing a first tire model for the first vehicle, estimating a road profile for the road surface based upon the spindle dynamics data and the first tire model, developing a second tire model for a second vehicle, coupling the second vehicle to the spindle-coupled simulator, and generating a set of control signals for driving the spindle-coupled simulator with the second vehicle coupled thereto so that a road response generated by the spindle-coupled simulator is consistent with the road profile. The method allows accurate testing of the second vehicle without driving it over the test road. The tire model is developed using system identification techniques.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: March 11, 1997
    Assignee: Ford Motor Company
    Inventors: David M. Fricke, Mark D. Hansen, Rakan C. Chabaan
  • Patent number: 5574226
    Abstract: An environmental test facility for testing vehicle suspension and body components is disclosed. The test facility is transportable over conventional roads and is essentially self-contained for set-up at manufacturing facilities or other locations to facilitate testing of vehicles. A four-poster hydraulic suspension test simulator is provided. A temperature-controlled environment and simulated sunlight sources may also be provided.
    Type: Grant
    Filed: April 6, 1995
    Date of Patent: November 12, 1996
    Assignee: Ford Motor Company
    Inventors: Kenneth R. Reuther, Stephen A. Nolan, Richard W. Squires, Mark N. Maskill, Mark W. Talley
  • Patent number: 5567866
    Abstract: A side load device for testing, for example, shock absorbers, in which an air actuator selectively moves an element to impose a side force on a product under test.
    Type: Grant
    Filed: October 18, 1994
    Date of Patent: October 22, 1996
    Assignee: Instron Corporation
    Inventor: Victor A. Popp
  • Patent number: 5551298
    Abstract: In order to be able to quickly identify rattles and squeaks occurring on vehicles, a vibration generator is used which causes the vehicle to be vibrated at a range of different frequencies (C). By setting up the apparatus so that the frequency range is traversed whilst a vehicle is being caused to vibrate, the frequency at which the noise begins to occur (A) can be noted, the frequency at which the noise stops occurring (B) can be noted and this information can be compared with stored data (E) to identify the source of the noise.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: September 3, 1996
    Assignee: Ford Motor Company
    Inventor: Kevin D. Rayment
  • Patent number: 5540099
    Abstract: A vibration detecting device is provided for detecting a vibration applied to a vehicle, which includes an accelerometer mounted on the vehicle, an inverting amplifier for inverting and amplifying the output from the acceleration detecting device, and an integrator for integrating the output from the inverting amplifier. The output from the accelerometer is converted into a vibration detecting output by the integrator.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: July 30, 1996
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Shokichi Harashima
  • Patent number: 5533403
    Abstract: A loading assembly used to apply selected forces and moments to a vehicle spindle includes a wheel adapter housing mounted to the vehicle spindle. In a first embodiment, the loading assembly reduces crosstalk between application of lateral forces and unintended braking moments, and lateral forces and unintended longitudinal forces. In a second embodiment, a second loading assembly is adjustable so that braking moments are induced when a vertical force is applied when the loading assembly is used on trailing arm suspensions.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: July 9, 1996
    Assignee: MTS Systems Corporation
    Inventors: Steven R. Haeg, Paul J. Leska, Sr., Ricky L. Zieman
  • Patent number: 5465615
    Abstract: A loading assembly that permits a lateral force to be applied parallel to an axis of a vehicle spindle includes a support frame and a wheel adapter housing mounted to the vehicle spindle. A loading member is pivotally joined to the support frame at a position spaced apart from the wheel adapter housing on the axis of the spindle. A plurality of spaced apart struts connects the loading member to the wheel adapter housing. An actuator applies a selected force to the loading member, which is transferred as a lateral force to the vehicle spindle. In a first embodiment, an adjustable coupling is provided between the actuator and the loading member to emulate a rolling radius of a tire assembly mounted to the vehicle spindle. In a second embodiment, a second loading member is operably connected to the first-mentioned loading member. A second actuator applies a force to the second loading member to apply a selected moment to the vehicle spindle.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: November 14, 1995
    Assignee: MTS Systems Corporation
    Inventors: Niel R. Petersen, Paul S. Petersen, Joseph W. Daley
  • Patent number: 5259246
    Abstract: Apparatus for testing a wheel suspension of a vehicle, comprising at least one measuring plate adapted to be moved by an excitation mechanism, a first measuring device for each measuring plate for measuring vertical forces exerted by an air tire of the vehicle on the measuring plate, a processing unit for processing measured values provided by the first measuring device and a display unit for displaying a measuring result. Further, a second measuring device is provided for measuring a selected one of a position, velocity and acceleration of the measuring plate. The processing unit being adapted to determine a transfer function of the wheel suspension from the measuring values of the first measured device and measured values of the second measuring device, the wheel suspension comprising a plurality of system elements, each of the system elements carrying a system value.
    Type: Grant
    Filed: September 10, 1991
    Date of Patent: November 9, 1993
    Assignee: Analogic Engineering, B.V.
    Inventor: Victor C. L. H. Stuyts
  • Patent number: 5177998
    Abstract: A device for calculating the center of gravity (CG) and moments of inertia of a vehicle. The vehicle is driven onto the device and the height of its center of gravity is determined by hanging weights on the device to displace the vehicle's CG from its position without the weights; the height of the CG is then calculated by a simple mathematical formula. The pitch moment of inertia is calculated by aligning its axis perpendicular to the axis of the pivots and allowing the vehicle to swing, then calculating the moment of inertia by another mathematical formula. The roll moment of inertia is calculated by rotating the vehicle 90 degrees, letting it swing, and then using a slighly different formula. The yaw moment of inertia is calculated by lowering the device to the ground and causing the vehicle to oscillate about a pivot point, then calculating the yaw moment of inertia by means of another mathematical formula.
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: January 12, 1993
    Assignee: The United States of America as represented by the Secretary of Transportation
    Inventor: Michael W. Monk