Patent application number | Description | Published |
20100305800 | METHOD AND APPARATUS FOR DETECTING ENGINE FIRING IN A HYBRID POWERTRAIN SYSTEM - A method for controlling a hybrid powertrain system includes commanding engine operation to transition from an engine-off state to an engine-on state. A control scheme detects engine firing based upon input speed, input torque and a change in the input torque. | 12-02-2010 |
20110066359 | METHOD AND APPARATUS FOR OPTIMIZING ENGINE ON/OFF CYCLING IN A VEHICLE - A method is provided for optimizing the cycling frequency between engine on/off states in a vehicle having a controller and auto start/auto stop functionality. The method includes detecting an engine state cycling event, measuring a plurality of vehicle operating values, and using the controller to optimize the cycling frequency via at least one of: automatically adjusting an interval between an auto start event and an auto stop event when each of a first set of the vehicle operating values exceeds a corresponding threshold, and temporarily inhibiting the auto start/auto stop functionality when any value in a second set of the vehicle operating values falls outside of a hysteresis band created around the second set. A vehicle includes an engine and a controller having an algorithm for optimizing the cycling frequency between engine on/off states as set forth above. | 03-17-2011 |
20120065023 | SYSTEM AND METHOD FOR CONTROLLING AMOUNT OF TIME NEEDED TO COMMENCE TRANSMITTING ENGINE TORQUE IN A VEHICLE - A method controls an amount of time required to commence transmitting torque of an internal combustion engine equipped with a stop/start feature to a transmission configured to transmit the torque of the engine to drive-wheels in a vehicle. The method includes determining whether a start of the engine is likely. The method also includes pre-filling with fluid a hydraulically-actuated clutch that is configured to connect the engine to the transmission when the start of the engine is likely. Accordingly, the amount of time required to commence transmitting torque of the engine to the transmission is reduced. A system employs the method for controlling an amount of time required to commence transmitting torque of the engine. | 03-15-2012 |
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 |
20130225363 | METHOD TO REDUCE POWERTRAIN NOISE AND VIBRATION DURING ENGINE START IN HYBRID VEHICLE - A method of controlling a powertrain system of a hybrid vehicle includes detecting a request to start an engine, incrementally applying torque to the powertrain system, and biasing the torque against a static member of the powertrain system, such as a parking pawl of a transmission when the transmission is disposed in a parking position, to remove lash from the powertrain system prior to starting the engine. | 08-29-2013 |
20130316872 | METHOD AND APPARATUS FOR CONTROLLING A HYDRAULIC PUMP FOR A MULTIMODE TRANSMISSION OF A POWERTRAIN SYSTEM - A powertrain system includes an internal combustion engine configured to execute autostop and autostart operations, and a multi-mode transmission with an electrically-powered hydraulic pump configured to provide pressurized hydraulic fluid to a hydraulic circuit. A Method for controlling operation of the hydraulic pump includes operating the hydraulic pump in a low power mode only when the engine is in an engine-off state, operator inputs to a brake pedal, an accelerator pedal, and a transmission range selector are within allowable states, temperatures of select transmission components are within respective predetermined temperature ranges, and transmission output torque is less than a threshold torque request. | 11-28-2013 |
20140031171 | METHOD AND APPARATUS FOR EXECUTING A CLUTCH-DRIVEN ENGINE AUTOSTART OPERATION - A powertrain system includes an internal combustion engine, a multi-mode transmission and a driveline. A method for controlling the powertrain system in response to a command to execute an engine autostart operation during vehicle operation includes executing a clutch-driven engine autostart operation to start the engine upon determining that a present transmission output speed is greater than a minimum output speed for engine operation and upon determining that a selected clutch configured to effect a mechanical coupling between the engine and the driveline is activatable. | 01-30-2014 |
20140195080 | HYBRID POWERTRAIN INPUT TORQUE MANAGEMENT - A method for controlling a hybrid powertrain includes monitoring input torque of an input member and may include determining an oscillation torque. The method monitors critical vehicle characteristics, including at least a transmission operating mode and an input speed, and operates the powertrain at the input torque. The method compares input torque to a minimum threshold or oscillation torque to a fatigue threshold and identifies a first critical event, which occurs when input torque exceeds the minimum threshold or oscillation torque exceeds the fatigue threshold. The method identifies a first peak with the on-board controller during the first critical event. Peak events occur when the monitored input torque or oscillation torque changes between positive and negative slope. The method identifies a first CVC set occurring with the first peak and may record the first CVC set and the first peak in a look-up table. | 07-10-2014 |