Patent application number | Description | Published |
20100292880 | METHOD FOR MANAGING BATTERY POWER WITHIN A HYBRID POWERTRAIN SYSTEM - A hybrid powertrain system includes an internal combustion engine and a torque machine wherein electrical energy is controllably transferred between an electric energy storage device and the torque machine by a control system. A method for controlling the hybrid powertrain system includes monitoring a voltage, a current, and a power output of the electric energy storage device. A battery power control scheme is executed to control the output power of the electric energy storage device associated with the electrical energy transferred between the electric energy storage device and the torque machine. The battery power control scheme is disabled when the control system loses a power limit authority associated with the electrical energy transferred between the electric storage device and the torque machine during ongoing operation. The battery power control scheme is re-enabled when the control system regains the power limit authority. | 11-18-2010 |
20110070991 | ELECTRO-MECHANICAL TRANSMISSION CONTROL SYSTEM - A system for robust fault detection in an electrically variable, hydraulically controlled transmission includes independently monitoring hydraulic pressure within a hydraulic control circuit and electric machine rotation for detecting clutch state faults. | 03-24-2011 |
20110238246 | METHOD AND APPARATUS FOR CONTROLLING MECHANICAL POWER INPUT FROM AN INTERNAL COMBUSTION ENGINE COUPLED TO A HYBRID TRANSMISSION - A method for controlling operation of a hybrid powertrain includes monitoring input speed from the engine to the hybrid transmission, calculating an input speed error between the monitored input speed and a preferred input speed, monitoring operating parameters associated with a plurality of torque actuators wherein the torque actuators include the internal combustion engine, the electric torque machine and the output member, selecting one of the torque actuators, and modifying a state of a control parameter associated with the selected one of the torque actuators in response to the input speed error. | 09-29-2011 |
20120035019 | METHOD AND APPARATUS TO DETECT A MODE-GEAR MISMATCH DURING OPERATION OF AN ELECTRO-MECHANICAL TRANSMISSION - A vehicular powertrain includes an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine. A method for operating the powertrain includes monitoring operator inputs, monitoring a transmission output, and terminating an engine operating mode when a time-rate change in the transmission output exceeds a threshold absent a change in the monitored operator inputs. | 02-09-2012 |
20120209462 | OPTIMIZATION TO REDUCE FUEL CONSUMPTION IN CHARGE DEPLETING MODE - A powertrain includes an internal combustion engine, a motor utilizing electrical energy from an energy storage device, and a plug-in connection. A Method for controlling the powertrain includes monitoring a fuel cut mode, ceasing a fuel flow to the engine based upon the fuel cut mode, and through a period of operation including acceleration of the powertrain, providing an entirety of propelling torque to the powertrain with the electrical energy from the energy storage device based upon the fuel cut mode. | 08-16-2012 |
20120323461 | METHOD AND APPARATUS FOR CONTROLLING HYBRID POWERTRAIN SYSTEM IN RESPONSE TO ENGINE TEMPERATURE - A method for controlling a hybrid powertrain system including an internal combustion engine includes controlling operation of the hybrid powertrain system in response to a preferred minimum coolant temperature trajectory for the internal combustion engine. | 12-20-2012 |
20130046425 | METHOD FOR CONTROLLING POWERTRAIN PUMPS - A method of controlling a pump supplying a fluid to a transmission includes sensing a requested power and an excess power for a powertrain. The requested power substantially meets the needs of the powertrain, while the excess power is not part of the requested power. The method includes sensing a triggering condition in response to the ability to convert the excess power into heat in the transmission, and determining that an operating temperature of the transmission is below a maximum. The method also includes determining a calibrated baseline and a dissipation command for the pump. The calibrated baseline command is configured to supply the fluid based upon the requested power, and the dissipation command is configured to supply additional fluid and consume the excess power with the pump. The method operates the pump at a combined command, which is equal to the calibrated baseline plus the dissipation commands. | 02-21-2013 |
20130197749 | VEHICLE CABIN WARM-UP - A method of heating a cabin in a hybrid vehicle having an internal combustion engine employing a coolant to remove engine heat, and a heating ventilation and air conditioning (HVAC) system using the coolant to heat the cabin is disclosed. The method includes detecting a request to achieve a predetermined temperature inside the cabin. The method also includes selecting a first baseline mode of engine operation to supply thermal energy to the coolant, and selecting a second mode of engine operation to supply additional thermal energy to the coolant if the predetermined temperature has not been achieved via the first mode of operation. The method additionally includes selecting a third mode of engine operation if the predetermined temperature has not been achieved via the second mode of operation. The predetermined temperature may also be maintained by supplying thermal energy to the coolant after the predetermined temperature has been achieved. | 08-01-2013 |
20140309823 | METHOD AND APPARATUS FOR CONTROLLING A MULTI-MODE POWERTRAIN SYSTEM - A method for operating a powertrain system to transfer torque among an engine, torque machines, and a driveline in response to an output torque request includes executing a selection scheme to evaluate operating in a plurality of candidate powertrain states including a pseudo-electric vehicle (EV) range responsive to the output torque request. A respective minimum cost for operating the powertrain system in each of the candidate powertrain states including the pseudo-EV range is determined. A preferred powertrain state is selected, and is one of the candidate powertrain states including the pseudo-EV range associated with a minimum of the respective minimum costs. The powertrain system is controlled in the preferred powertrain state responsive to the output torque request. | 10-16-2014 |