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| Number | Title | Issue Date |
| 8179127 | Method and apparatus to monitor position of a rotatable shaft A rotatable shaft is equipped with a measurement device that generates output signals corresponding to discrete angular positions of the shaft. Rotational angles of the shaft are measured for a complete rotational period. A true angular velocity of the shaft is dete... | 05/15/2012 |
| 8170764 | Method and apparatus to reprofile input speed during speed during speed phase during constrained conditions for a hybrid powertrain system A method to control a powertrain including a transmission, an engine, and an electric machine includes monitoring an input speed, monitoring an output speed, upon initiation of a transmission shift, determining a plurality of input acceleration profiles for controll... | 05/01/2012 |
| 8170762 | Method and apparatus to control operation of a hydraulic pump for an electro-mechanical transmission A method for controlling a hydraulic flow within a powertrain comprising an electromechanical transmission mechanically-operatively coupled to an engine adapted to selectively transmit power to an output, wherein the transmission utilizes a hydraulic control system ... | 05/01/2012 |
| 8167773 | Method and apparatus to control motor cooling in an electro-mechanical transmission A method for controlling a powertrain including an transmission coupled to an engine and an electric machine and a hydraulic control system providing hydraulic flow to a cooling circuit of the electric machine, wherein the transmission is adapted to selectively tran... | 05/01/2012 |
| 8165777 | Method to compensate for transmission spin loss for a hybrid powertrain system A powertrain system includes an engine coupled to an input member of a hybrid transmission. The hybrid transmission is operative to transmit torque between the input member and a torque generating machine and an output member. A method for controlling the powertrain... | 04/24/2012 |
| 8160761 | Method for predicting an operator torque request of a hybrid powertrain system A method for controlling a hybrid powertrain system based upon a predicted speed of an output member, a predicted operator torque request, and a predicted accelerator pedal position is disclosed. The method comprises predicting the accelerator pedal position based u... | 04/17/2012 |
| 8155814 | Method of operating a vehicle utilizing regenerative braking A vehicle includes a powertrain system and a friction braking system, the powertrain system including a hybrid transmission operative in one of a fixed gear operating range state and a continuously variable operating range state to transmit torque between an input m... | 04/10/2012 |
| 8145397 | Optimal selection of blended braking capacity for a hybrid electric vehicle A hybrid powertrain system includes a transmission operative to transfer power between an input member and a torque machine and an output member coupled to a driveline coupled to a wheel including an actuable friction brake. The torque machine is operative to react ... | 03/27/2012 |
| 8145375 | System constraints method of determining minimum and maximum torque limits for an electro-mechanical powertrain system A powertrain including an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and first and second electric machines to transmit power to an output member is disclosed. A method for controlling the electro-mechanical tra... | 03/27/2012 |
| 8138703 | Method and apparatus for constraining output torque in a hybrid powertrain system A powertrain system includes a transmission operative to transfer power between an engine coupled to an input member and a plurality of torque machines and an output member, A method for controlling the powertrain system includes monitoring system operation and dete... | 03/20/2012 |
| 8135532 | Method for controlling output power of an energy storage device in a powertrain system A method for controlling a powertrain system includes monitoring a state-of-charge of the energy storage device and determining a first set of electric power limits and a second set of electric power limits based on the state-of-charge of the energy storage device. ... | 03/13/2012 |
| 8135526 | Method for controlling regenerative braking and friction braking A vehicle includes a powertrain system and a friction braking system communicating tractive torque with a driveline, the powertrain system including a torque machine, and an energy storage device connected to the torque machine, said torque machine communicating tra... | 03/13/2012 |
| 8135519 | Method and apparatus to determine a preferred output torque for operating a hybrid transmission in a fixed gear operating range state A hybrid transmission includes a torque machine and an energy storage device connected thereto. The hybrid transmission is operative to transfer power between an input member and an output member and the torque machines in a fixed gear operating range state. A metho... | 03/13/2012 |
| 8133151 | System constraints method of controlling operation of an electro-mechanical transmission with an additional constraint Operation of an electro-mechanical transmission includes determining motor torque constraints and battery power constraints. An additional constraint on the electro-mechanical transmission is determined. A preferred output torque is determined that is achievable wit... | 03/13/2012 |
| 8131437 | Method for operating a powertrain system to transition between engine states A powertrain system includes a multi-cylinder engine coupled to a hybrid transmission. The engine is selectively operative in one of a plurality of main engine states to transfer engine torque to the hybrid transmission. A method for operating a powertrain system in... | 03/06/2012 |
| 8126624 | Method for selection of optimal mode and gear and input speed for preselect or tap up/down operation A powertrain system includes an engine mechanically coupled to an electro-mechanical transmission at an input thereto selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states. A method for controlling... | 02/28/2012 |
| 8121768 | Method for controlling a hybrid powertrain system based upon hydraulic pressure and clutch reactive torque capacity A powertrain system includes an engine coupled to an electro-mechanical transmission to transfer power between the engine and a plurality of torque generating machines and an output member. The transmission is operative in one of a plurality of operating range state... | 02/21/2012 |
| 8121767 | Predicted and immediate output torque control architecture for a hybrid powertrain system A method for controlling torque in a hybrid powertrain system to selectively transfer mechanical power to an output member includes monitoring operator inputs to an accelerator pedal and to a brake pedal. An immediate accelerator output torque request, a predicted a... | 02/21/2012 |
| 8121766 | Method for operating an internal combustion engine to transmit power to a driveline A method for operating an engine includes defining a two-dimensional search region based upon an input power transmittable between the internal combustion engine and an electromechanical transmission. The method further includes iteratively dividing the two-dimensio... | 02/21/2012 |
| 8121765 | System constraints method of controlling operation of an electro-mechanical transmission with two external input torque ranges A method to control an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and first and second electric machines to transmit power to an output member includes determining motor torque constraints and battery power cons... | 02/21/2012 |
| 8118903 | Method for preferential selection of modes and gear with inertia effects for a hybrid powertrain system A method for controlling a hybrid powertrain system selectively operative in one of a plurality of operating range states including an engine includes monitoring an operator torque request and a rotational speed of the output member, determining inertial effects of ... | 02/21/2012 |
| 8112207 | Method and apparatus to determine a preferred output torque for operating a hybrid transmission in a continuously variable mode A hybrid transmission includes a torque machine and an energy storage device connected thereto. The hybrid transmission is operative to transfer power between an input member and an output member and the torque machine in a continuously variable operating range stat... | 02/07/2012 |
| 8112206 | Method for controlling a powertrain system based upon energy storage device temperature A powertrain system includes an engine coupled to an input member of a transmission device operative to transmit torque between the input member and a torque machine and an output member. The torque machine is connected to an energy storage device. A method for cont... | 02/07/2012 |
| 8112194 | Method and apparatus for monitoring regenerative operation in a hybrid powertrain system A hybrid powertrain system includes an engine and a torque actuator coupled to a driveline to transfer tractive power to a wheel including a friction brake. A method includes monitoring an operator braking request and determining a request for regenerative braking t... | 02/07/2012 |
| 8112192 | Method for managing electric power within a powertrain system A method for controlling a powertrain system includes monitoring output power of the energy storage device, modifying a preferred electric power limit when the output power of the energy storage device transgresses a trigger power limit, and determining the power co... | 02/07/2012 |
| 8099219 | Method and apparatus for securing an operating range state mechanical transmission A hybrid powertrain system includes a transmission operative in a plurality of operating range states. An operating range state can be secured, including assigning each operating range state to a group that can be verified, monitoring a transition path from a first ... | 01/17/2012 |
| 8099204 | Method for controlling electric boost in a hybrid powertrain A powertrain system includes an engine coupled to an input member of a transmission operative to transmit power between the input member, a torque machine and an output member. The torque machine is connected to an energy storage device. The engine is selectively op... | 01/17/2012 |
| 8098041 | Method of charging a powertrain A method of charging a powertrain includes detecting an external power source in electrical communication with the powertrain, establishing a virtual network between charging control module, and transferring charge from the external power source to the powertrain. | 01/17/2012 |
| 8095282 | Method and apparatus for soft costing input speed and output speed in mode and fixed gear as function of system temperatures for cold and hot operation for a hybrid powertrain system Methods and systems for manipulating inputs relating to transmission shifting events in a hybrid-engine powered vehicle equipped with an electro-mechanical hybrid transmission include sets of preferability factors inputted from engine sensors are combined in a micro... | 01/10/2012 |
| 8095254 | Method for determining a power constraint for controlling a powertrain system A method for controlling a powertrain system includes monitoring operating conditions of an engine, a transmission device, and an energy storage device. The method further includes determining a first power constraint, filtering the first power constraint utilizing ... | 01/10/2012 |
| 8092339 | Method and apparatus to prioritize input acceleration and clutch synchronization performance in neutral for a hybrid powertrain system A method for controlling a powertrain includes operating a transmission in a neutral operating range state, monitoring commands affecting an input speed, monitoring a tracked clutch slip speed, determining constraints on an input acceleration based upon the commands... | 01/10/2012 |
| 8079933 | Method and apparatus to control engine torque to peak main pressure for a hybrid powertrain system A method to control a powertrain including a transmission, an engine, and an electric machine includes monitoring a rotational speed of the engine, monitoring a temperature of a transmission fluid, determining a maximum hydraulic pressure within a hydraulic control ... | 12/20/2011 |
| 8073610 | Method and apparatus to control warm-up of an exhaust aftertreatment system for a hybrid powertrain An internal combustion engine is controlled to achieve a preferred temperature of the exhaust aftertreatment system and to minimize a total engine energy loss. A transmission is controlled to achieve a torque output based upon the preferred engine operation. ... | 12/06/2011 |
| 8073602 | System constraints method of controlling operation of an electro-mechanical transmission with an additional constraint range A method for controlling an electro-mechanical transmission mechanically coupled to first and second electric machines to transmit power to an output member includes determining motor torque constraints and battery power constraints. A preferred output torque to an ... | 12/06/2011 |
| 8073601 | Method for preferential selection of mode and gear and input speed based on multiple engine state fueling costs for a hybrid powertrain system A method for controlling a hybrid powertrain system including an engine selectively operative in one of an all-cylinder state and a cylinder deactivation state based upon power costs includes determining engine power costs for each operating range state of the trans... | 12/06/2011 |
| 8070647 | Method and apparatus for adapting engine operation in a hybrid powertrain system for active driveline damping A powertrain includes an engine coupled to an input member of a hybrid transmission. The hybrid transmission is operative to transfer power between an input member and a plurality of torque machines and an output member. A method for controlling the powertrain inclu... | 12/06/2011 |
| 8068966 | Method for monitoring an auxiliary pump for a hybrid powertrain A powertrain system includes a hybrid transmission coupled to an engine and an auxiliary hydraulic pump. The auxiliary hydraulic pump is commanded to operate at a predetermined speed only when enable criteria are met. An engine-off state is inhibited based upon a di... | 11/29/2011 |
| 8067908 | Method for electric power boosting in a powertrain system A powertrain system is operative to transfer power between an input member and a plurality of power actuators and an output member to generate an output torque. The power actuators are connected to an energy storage device. A method for controlling the powertrain sy... | 11/29/2011 |
| 8060267 | Method for controlling power flow within a powertrain system A method for operating a powertrain system includes monitoring a state of charge of an energy storage device and determining an effective state of charge based upon the monitored state of charge of the energy storage device and a range of available power from the en... | 11/15/2011 |
| 8035324 | Method for determining an achievable torque operating region for a transmission A method for controlling a transmission operative to transfer power between an input member and torque machines and an output member includes determining available power, motor torque constraints, and other constraints on torque transfer. Equations are provided, tra... | 10/11/2011 |
