Patent application number | Description | Published |
20120078478 | Control of Automatic Transmission Shift by Wire Range Selection - A method for controlling a transmission includes using actuation of a button of a shift module to produce a signal representing a desired gear, using the signal and a second signal commanding a park range to determining a priority range, using a shift mechanism to attempt engagement of the transmission in the priority range, and if the priority range is park and park is not engaged, engaging a park brake. | 03-29-2012 |
20120131993 | Shift-By-Wire Default-To-Park Functional Verification - A method for testing a transmission gear shift device includes using an electric machine and a primary mechanism to place the device and a secondary mechanism, latched to the primary mechanism, in a park position, using a motor to delatch the secondary mechanism from the primary mechanism, using the electric machine to absorb energy released by a spring when delatching, and using the electric machine to relatch the secondary mechanism to the primary mechanism. | 05-31-2012 |
20130151092 | Method and System for Providing a Brake Transmission Shift Interlock Override Mode in a Shift-by-Wire Transmission - A method and system provides a Brake Transmission Shift Interlock Override mode in a vehicle including a shift-by-wire transmission. With power applied and ignition on, a driver will press and hold an override switch for a calibrated time. While the override switch is pressed, the driver presses a non-Park button for another calibrated time. The result will be that the vehicle is placed in the selected range wherein the transmission will not automatically shift to Park upon detecting a triggering event. The driver is able to shift the vehicle from Park, even if an electrical failure prevents the transmission from shifting out of Park. As such the vehicle can be driven until the failure is serviced. | 06-13-2013 |
20130151095 | Method and System for Providing a Neutral Hold Mode in a Shift-by-Wire Transmission - A method and system provides a Neutral Hold mode in a vehicle having a shift-by-wire transmission with a return to park feature. The Neutral Hold mode is entered upon detecting when the transmission control mechanism has been used a first time to select Neutral when a driver's door is open or has been used a second time to select Neutral. When in Neutral Hold mode, the transmission will stay in Neutral and not shift to Park upon detecting that a driver has exited the vehicle. | 06-13-2013 |
20130151096 | Method and System for Providing a Neutral Tow Mode in a Shift-by-Wire Transmission - A method and system provides a Neutral Tow mode in a vehicle with a shift-by-wire transmission by displaying a Neutral Tow mode option when the transmission control mechanism has been used to select Park, an ignition switch is on, and an engine is off or an information button has been pushed and entering a Neutral Tow mode upon detecting a triggering event. The Neutral Tow mode is canceled upon detecting a certain sequence of events, such as turning on the ignition switch, depressing and holding a brake pedal, and selecting Park. When in Neutral Tow mode the transmission will stay in Neutral, without automatically shifting to Park or using battery power, thereby enabling the vehicle to be towed long distances without draining battery power. | 06-13-2013 |
20130151097 | Method and System for Providing a Voting Strategy for Determining a Mode State in a Shift-by-Wire Transmission - A voting strategy is used to determine the mode state of a transmission when a vehicle is restarted. A Powertrain Control Module, a Transmission Range Control Module, and a Gear Shift Module communicate through a communication network during execution of the voting strategy. Each module stores a remembered mode state (Normal, Neutral Hold, Neutral Tow, etc.) of the transmission in non-volatile memory. Upon module initialization, the Powertrain Control Module will compare its own remembered mode state of the transmission with the remembered mode state reported by the other two modules. A basic voting strategy is that if two of the three modules report the same remembered mode state then the Powertrain Control Module changes the transmission to that same mode state. | 06-13-2013 |
20130207773 | Method and System for Detecting Door State and Door Sensor Failures - A system includes a controller that executes a method for determining failure of the door latch sensor using both the door latch sensor and a door lock sensor. If the door latch sensor is faulty, the controller adjusts an automatic feature of the vehicle based on a door lock signal instead of a door state signal. The controller is also configured to mark the door latch signal as faulty if the door latch system is not functioning properly by using a fault counter that tracks the door lock sensor. | 08-15-2013 |
20130268171 | SUPPLEMENTAL ELECTRIC PARK BRAKE SYSTEM - The present disclosure relates to a method for controlling an electric park brake, including: receiving shift-command data related to operator shift commands; receiving transmission-operating-gear data related to a transmission mode of operation; comparing shift-command data and transmission-operating-gear data; and actuating an electric park brake when shift-command data fails to match transmission-operating-gear data. | 10-10-2013 |
20140136060 | Method and System for Providing a Voting Strategy for Determining a Mode State in a Shift-By-Wire Transmission - A voting strategy is used to determine the mode state of a transmission when a vehicle is restarted. The transmission includes a return to park feature and a controller including at least three memories. The controller is configured to write a remembered mode state into each memory. The remembered mode state is one of a Normal mode state that allows the transmission to automatically shift to Park, a hold mode state that causes the transmission to remain in Neutral and not automatically shift to Park upon detecting a triggering event or other mode states. The controller reads each memory and, when at least two of the remembered mode states are the same mode state, causes the transmission to enter a mode state corresponding to the same mode state. | 05-15-2014 |
20140209429 | PARK MECHANISM FOR A MOTOR VEHICLE - A park mechanism includes a cam pivotal between Park and not-Park ranges, including a radial outer surface formed with angularly spaced lobes, a roller urged by a spring into contact with the outer surface, a park spring urging the cam toward the Park-range, a power source for pivoting the cam, and a pawl actuated by cam movement into a Park state and a not-Park state. | 07-31-2014 |