| KELSEY-HAYES COMPANY Patent applications |
| Patent application number | Title | Published |
|---|
| 20120136540 | Fail Safe Operational Steering System for Autonomous Driving - This invention refers to an electrically assisted steering system that includes a torque sensor connected to a vehicle steering wheel. The system also includes a torque control ECU that is responsive to torque signals from the torque sensor to generate a motor assist requirement signal. The system further includes a motor control ECU responsive to the motor assist requirement signal to generate a motor control signal. The system additionally includes a steering assist motor responsive to the motor control signal to provide a steering assistance torque to the vehicle steering system. Finally, the system includes a safety domain ECU connected to at least one vehicle operational parameter sensor to generate a torque signal and send the same signal to the torque control ECU. The safety domain ECU is also being in communication with the torque control ECU and the Motor control ECU. | 05-31-2012 |
| 20120133201 | Attenuator For A Vehicle Braking System - A vehicle braking system includes a slip control system operable in an electronic stability control (ESC) mode to automatically and selectively apply the brakes in an attempt to stabilize the vehicle when an instability condition has been sensed. The slip control system is further operable in an adaptive cruise control (ACC) mode to automatically apply the brakes to slow the vehicle in response to a control signal. The slip control system includes a variable speed motor drive piston pump for supplying pressurized fluid pressure to the brakes through a valve arrangement. In the ESC mode, the pump motor operates in an ESC speed range, and in the ACC mode, the pump motor operates in an ACC speed range lower than the ESC speed range. The slip control system further includes an attenuator connected to a pump outlet for dampening pump output pressure pulses prior to application to the brakes. The attenuator includes an elastomeric member located in an attenuator chamber of a housing. The attenuator chamber defines a shoulder and the elastomeric member includes a flange which rests on the shoulder and locates the elastomeric member in a predetermined axial position within the attenuator chamber. An outside wall of the elastomeric member includes circumferentially extending grooves defining ribs between adjacent grooves. | 05-31-2012 |
| 20120067678 | ANCHOR BRACKET FOR USE IN A DISC BRAKE ASSEMBLY AND METHOD FOR MAKING THE SAME - A method for producing an anchor bracket adapted for use in a disc brake assembly includes providing an as cast anchor bracket having two extending arms that include an inboard end and an outboard end connect by a bridge portion. Each of inboard ends defines an inboard channel and each of the outboard ends defines an outboard channel. Each of the bridge portions includes a guide pin hole. The inboard ends, outboard ends, and bridge portions define a rotor channel. One of the inboard ends and outboard ends includes a mounting opening. At least one of the inboard ends and the outboard ends are interconnected by a tie bar. Only the faces of the inboard channel and the outboard channel are machined for brake shoe assembly clearance. Only portions of the arms facing the rotor channel and not a portion of an underside the bridge facing the rotor channel are machined for rotor clearance. | 03-22-2012 |
| 20110285197 | Hydraulic Brake System with Controlled Boost - A vehicle brake system includes a brake pedal unit (BPU) coupled to a vehicle brake pedal and including an input piston connected to operate a pedal simulator during a normal braking mode, and coupled to actuate a pair of output pistons during a manual push through mode. The output pistons are operable to generate brake actuating pressure at first and second outputs of the BPU. A hydraulic pressure source for supplying fluid at a controlled boost pressure is included. The system further includes a hydraulic control unit (HCU) adapted to be hydraulically connected to the BPU and the hydraulic pressure source, the HCU including a slip control valve arrangement, and a switching base brake valve arrangement for switching the brake system between the normal braking mode wherein boost pressure from the pressure source is supplied to first and second vehicle brakes, and the manual push through mode wherein brake actuating pressure from the BPU is supplied to the first and second vehicle brakes. | 11-24-2011 |
| 20110192686 | BRAKE CALIPER FOR DISC BRAKE ASSEMBLY AND METHOD AND APPARATUS FOR PRODUCING SAME - This invention relates to a brake caliper adapted for use in a vehicle disc brake assembly and method and apparatus for producing the same. The method for producing the brake caliper comprises the steps of: (a) providing a mold member having at least two mold sections; (b) providing a core member having at least a first male extension which is adapted to form an integrally cast locating recess in the brake caliper which is used as a locating surface for subsequent machining of the brake caliper; (c) disposing the core member in the mold member in a predetermined position; (d) supplying a suitable material to the mold member so as to form a brake caliper within the mold; (e) removing the brake caliper from the mold, wherein the brake caliper includes an integrally cast locating recess formed therein by the first male extension of the core member; and (f) machining the brake caliper using at least the integrally cast locating recess formed therein as a locating surface. | 08-11-2011 |
| 20110153156 | Method for Correction of Dynamic Output Signals of Inertial Sensors Having Mounting Offsets - A method for compensating inertial sensor measurement outputs for mounting locations that are not coincident, nor orthogonal, with the vehicle center of gravity. The method further utilizes vehicle angular rate measurements, data, or estimates to determine the discrete acceleration components of the composite inertial sensor measurement output. | 06-23-2011 |
| 20110146369 | Fail Safe Self Test for Motion Sensor Modules - A short duration test activation signal is applied to the test activation port of a motion sensor module and the test activation status port observed with an error flag being set if a corresponding signal does not appear at the test activation status port within a predetermined time period. | 06-23-2011 |
| 20080281487 | Method and Apparatus for Vehicle Rollover Mitigation - A method is provided for detecting a rollover event of a vehicle. A lateral kinetic energy of the vehicle is determined in response to vehicle longitudinal velocity and vehicle side slip angle. A lateral acceleration of the vehicle is measured. A tire normal force is measured. A rollover potentiality index is determined in response to the lateral kinetic energy and the lateral acceleration. A rollover index is determined by weighting the rollover potentiality index by a factor of the lateral acceleration and by a factor of the tire normal force. A comparison is made to determine if the rollover index is above a predetermined threshold. | 11-13-2008 |
| 20080246335 | Method For Detecting Brake Circuit Failure - A method is provided for detecting a fault condition in a hydraulic brake system of a vehicle having a first hydraulic brake circuit and a second hydraulic brake circuit. A correlation ratio is determined between a measured pressure and the actual vehicle acceleration. A first wheel velocity differential is determined and a second wheel velocity differential is determined. A weighting value is selected in response to determining whether the correlation ratio is within the predetermined range and whether the first wheel velocity differential and the second wheel velocity differential are opposite signs. The selected weighting value is added to a fault counter. A determination is made whether the fault counter is equal to or greater than a predetermined threshold. A fault condition is detected in response to the fault counter greater than or equal to the first predetermined threshold. | 10-09-2008 |
