| Patent application number | Description | Published |
|---|
| 20090294206 | Reducing The Effects Of Vibrations In An Electric Power Steering (EPS) System - The system and method described herein can be used to reduce the effects of periodic vibrations in an electric power steering (EPS) system for a vehicle, particularly, those that can lead to smooth road shake (SRS), torsional nibble, and/or other undesirable conditions. According to an exemplary embodiment, an electric motor is used to purposely generate counter-acting vibrations in the EPS system to cancel out the periodic vibrations generated by the wheel assemblies or corners. | 12-03-2009 |
| 20090301803 | VEHICULAR STEERING WHEEL AND COLUMN ASSEMBLY INCLUDING TORSIONAL DAMPER DEVICE - A steering wheel and column assembly is provided for deployment on a vehicle. In one embodiment, the steering wheel and column assemblies comprises: (i) a steering column housing, (ii) a rotatable steering assembly, and (iii) a torsional damper device. The rotatable steering assembly includes a steering column shaft, which is rotatably coupled to the steering column housing, and a steering wheel, which is fixedly coupled to the steering column shaft. The torsional damper device includes a stator body, which is fixedly coupled to the steering column housing, and a rotor body, which is fixedly coupled to the rotatable steering assembly. The rotor body frictionally engages the stator body to produce a predetermined coulomb torque frictional resistance. | 12-10-2009 |
| 20100031739 | METHOD OF MEASURING TORSIONAL DYNAMICS OF A STEERING COLUMN AT SMALL DYNAMIC AMPLITUDES - A method for measuring low amplitude dynamic properties of a steering column includes mounting the steering column into a test fixture and performing test runs. The test runs include subjecting the input end of the steering column to input excitations and measuring output conditions, which include at least one of acceleration, velocity and position, and determining whether the output conditions are within a predetermined output range. Input excitations may include sinusoidal excitations having a selected frequency range, torque, or displacement; or dither excitations. The selected torque or displacement is determined using open loop calculations from the output conditions, to achieve target acceleration levels. Data is interpreted to determine the natural frequency or rim gain of the steering column, which are compared to predetermined permissible ranges. The maximum steering wheel rim gain permissible level may be equal to approximately 1 divided by the polar moment of inertia of the wheel. | 02-11-2010 |
| 20100032877 | Cord Reinforced Resilient Membrane - A cord reinforced resilient membrane (or diaphragm) having a high radial (transverse) stiffness and a relatively low axial stiffness, wherein the cord reinforced resilient membrane has adapatability for use in both hydraulic and conventional strut mounts, as well as other applications, and wherein the radial stiffness provided by the cords is directionally tunable for utilization in a particular application. | 02-11-2010 |
| 20100057396 | Method For Analyzing Output From A Rotary Sensor - A method for analyzing the output of a rotary sensor, such as that coupled to a vehicle wheel assembly. In one embodiment, the method detects periodic irregularities in the output of an incremental rotary sensor and uses those irregularities with a reference signal and a pattern comparison technique to determine the absolute angular position of the sensor. | 03-04-2010 |
| 20100096789 | MULTISTATE SWITCHABLE ENGINE MOUNT AND SYSTEM - A vehicle engine mount system comprises a housing and an inertia track assembly that forms a first fluid chamber with an upper compliant member and a second fluid chamber with the second end of the housing. The inertia track assembly has first and second passageways therethrough for conducting fluid between the first and second fluid chambers. The first passageway has a substantially greater flow resistance than the second. First and second switches are coupled to the first and second passageways, respectively, for selectively enabling the first and second switches to control fluid displacement between the first fluid chamber and the second fluid chamber. | 04-22-2010 |
| 20100138109 | METHODS AND SYSTEMS FOR CONTROLLING MOTOR CURRENT IN STEERING SYSTEMS OF VEHICLES EQUIPPED WITH ELECTRIC STEERING ASSIST - A method of controlling a motor current for a vehicle having a motor and a steering system includes the steps of obtaining a torque signal from the steering system, calculating a torque, and adjusting the motor current based at least in part on the torque signal, the torque gain, or both. | 06-03-2010 |
| 20100257925 | METHODS AND SYSTEMS FOR TESTING TIRES OF VEHICLES TO QUANTIFY TRANSIENT TIRE FORCE AND MOMENT RESPONSES - A method for testing a tire of a vehicle that includes the steps of creating a first condition comprising a first slip angle of the tire, obtaining a first set of data regarding performance of the tire under the first condition, creating a second condition comprising either a second slip angle or lateral displacement of the tire, obtaining a second set of data regarding performance of the tire under the second condition, and determining the transient response of the lateral force and aligning moment of the tire, using the first set of data and the second set of data. | 10-14-2010 |
| 20110071729 | METHOD FOR ATTENUATING SMOOTH ROAD SHAKE IN AN ELECTRIC POWER STEERING SYSTEM - A method to reduce vehicular sensitivity to torsional smooth road shake (SRS) at the steering wheel provided by selectively increasing reverse driven-impedance of the steering system via an effective dynamic tuned vibration absorber comprising the existing power steering motor inertia supported on the torsional stiffness of the gearing to the rack in the case of a REPS system, or of the column rotary shaft in the case of a CEPS system. | 03-24-2011 |
