| Patent application number | Description | Published |
|---|
| 20090149298 | Aggressive Torque Converter Clutch Slip Control Design through Driveline Torsional Velocity Measurements - A system and method for setting the slip of a torque converter for a plurality of selected engine speeds and transmission gears. The method includes populating a table off-line, typically using a dynamometer, with torque converter slips for a plurality of selected engine speeds and transmission gears. A speed sensor is used to measure vibrations transmitted through the torque converter to the driveline of the vehicle. The sensor signal is sent to an analyzing system where it is converted to the frequency domain. A separate minimum slip value for each selected engine speed and transmission gear is stored in a table so that during vehicle operation, a controller will instruct the torque converter clutch to set the desired converter slip for the current engine speed and transmission gear provided for a particular throttle position and/or engine torque. | 06-11-2009 |
| 20090150032 | EFFECTIVE DRIVELINE VIBRATION DETECTION ALGORITHM IN TRANSMISSION TCC SLIP CONTROL - A method for adjusting the slip of a torque converter for a plurality of selected engine speeds, transmission gears and engine torque. A sensor is used to determine vibrations transmitted through the torque converter to the driveline of the vehicle. The sensor signal is sent to a controller where it is converted to the frequency domain. If the amplitude of the frequency signal exceeds a threshold, then the algorithm increases/decreases the converter slip until the driveline vibrations equal a threshold. | 06-11-2009 |
| 20090192015 | Driver Intention Detection Algorithm for Transmission Control - A system and method for providing TCC control and/or transmission gear shift control by considering the rate of change of the accelerator pedal or throttle position. The method determines whether the rate of change of the throttle position exceeds a predetermined positive rate of change or a predetermined negative rate of change and, if so, releases the TCC to provide TCC control. Alternatively, or additionally, the method can provide a transmission gear down-shift or up-shift depending on which direction the throttle position is changing. Once the TCC and/or gear shift control has been initiated, the method can start a timer and then return to normal TCC and/or gear shift control after the timer has expired. The TCC and/or gear shift control can also return to normal if the rate of change of the throttle position indicates that the throttle is being returned to its previous position. | 07-30-2009 |
| 20110060509 | DESIRED TORQUE CONVERTER CLUTCH SLIP FEEDBACK RECOVERY ALGORITHM FOR TIP-IN MANEUVERS - A powertrain includes an engine, a transmission, and a torque converter located between the engine and the transmission. Subsequent to a rapid increase in engine torque commands, torque converter slip is controlled by monitoring a measured torque converter slip after the rapid increase in engine torque commands, determining a maximum measured torque converter slip value resulting from the rapid increase in engine torque commands based upon the measured torque converter slip, determining a target value to which to reduce the torque converter slip, determining a recovery profile to reduce the torque converter slip from the maximum measured torque converter slip to the target value, and utilizing the recovery profile to controllably reduce the torque controller slip. Determining the recovery profile includes commanding reducing slip through the profile at commanded torque converter slip values selected to prevent the torque converter slip from reaching zero. | 03-10-2011 |
| 20110107864 | ELECTROMAGNETIC SYNCHRONIZER ACTUATING SYSTEM - An assembly for actuating a synchronizer includes a shift fork, a shift rail, and a permanent magnet connected to the shift rail. A first control coil is disposed in proximity to the permanent magnet. The first control coil is operable to produce a magnetomotive force on the permanent magnet in a first direction when a current is applied to the first control coil. A second control coil is disposed in proximity to the permanent magnet. The second control coil is operable to produce a magnetomotive force on the permanent magnet in a second direction when a current is applied to the second control coil. The permanent magnet is moved to a first position when the current is applied to the first control coil and the permanent magnet is moved to a second position when the current is applied to the second control coil. Movement of the magnet in turn moves the synchronizer between engaged positions. | 05-12-2011 |
| 20110153144 | SENSOR MESSAGING SYSTEMS AND METHODS - A pressure sensor module for a vehicle includes a sensing element module, a sampling module, a filtering module, and a monitoring module. The sensing element module measures a pressure of a fluid and outputs a pressure signal based on the pressure. The sampling module samples the pressure signal. The filtering module receives at least one filter coefficient from a control module and determines a filtered pressure based on at least one of the samples. The monitoring module receives a condition monitoring request from the control module, receives a predetermined value from the control module, and notifies the control module when a condition is satisfied based on a comparison of the predetermined value and one of the filtered pressure and a parameter determined based on the pressure signal. | 06-23-2011 |
| 20110166757 | CLOSED-LOOP FEEDBACK CONTROL AND REDUCTION OF THE TORQUE CONVERTER CLUTCH SLIP FOR ENHANCED DRIVABILITY FOR HEAVY TIP-IN MANEUVERS - A method for responding to a rapid change in engine torque includes monitoring a change in engine torque and determining a rapid change in engine torque when the change in engine torque exceeds a threshold change in engine torque. Subsequent to determining a rapid change in engine torque, an increase in the torque converter slip is provided by reducing the torque converter clutch pressure command by a selected value and thereafter the feedback control is deactivated for a predetermined duration. Subsequent to the predetermined duration, the feedback control is reactivated to decrease the torque converter slip toward a desired torque converter slip value. | 07-07-2011 |
| 20110166758 | STOCHASTIC DETECTION OF TORQUE CONVERTER SLIP SPEED AND RELATED CONTROL - A method for controlling torque converter slip includes operating the torque converter in a controlled slip mode, monitoring slip in the torque converter, statistically analyzing the monitored slip to determine a likely condition of the torque converter, and utilizing the likely condition of the torque converter to control the torque converter slip. | 07-07-2011 |
