Bayerishe Motoren Werke Aktiengesellschaft Patent applications |
Patent application number | Title | Published |
20140069690 | CELL CONNECTOR - A cell connector for the electrically conductive connection of a first cell terminal of a first electrochemical cell and a second cell terminal of a second electrochemical cell of an electrochemical device is provided, the cell connector including a first contact region for connection to the first cell terminal and a second contact region for connection to the second cell terminal, where the cell connector allows a large relative displacement between the first contact region and the second contact region even under the influence of only small deformation forces. The cell connector can include a base body made of two or more material layers, at least two material layers being connected to one another in one piece along a fold line. | 03-13-2014 |
20090118999 | 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-dimensional search region into a plurality of subregions based upon one of the input power and the input speed, iteratively determining an engine operating point within each of the subregions, iteratively calculating an operating cost to operate the internal combustion engine and the electromechanical transmission to meet the operator torque request for each engine operating point within each of the subregions, and iteratively identifying the subregion having a minimum operating cost to meet the operator torque request. A preferred engine operating point is determined based upon the engine operating point within the identified subregion having the minimum operating cost to meet the operator torque request. | 05-07-2009 |
20090118971 | METHOD AND APPARATUS FOR DETERMINATION OF FAST ACTUATING ENGINE TORQUE FOR A HYBRID POWERTRAIN SYSTEM - An engine is coupled to an input member of a hybrid transmission and the hybrid transmission is operative to transfer torque between the input member and a torque machine and an output member to generate an output torque in response to an operator torque request. The torque machine is connected to an energy storage device. A method for controlling the engine includes determining a preferred input torque from the engine to the hybrid transmission based upon operator inputs to an accelerator pedal and a brake pedal, determining maximum and minimum allowable input torques from the engine to the hybrid transmission, controlling the engine at the preferred input torque when the preferred input torque is within the maximum and minimum allowable input torques, and controlling the engine based upon the maximum and minimum allowable input torques when the preferred input torque is outside one of the maximum and minimum allowable input torques. | 05-07-2009 |
20090118969 | 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. | 05-07-2009 |
20090118964 | 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 operative in engine states comprising an engine-on state and an engine-off state. A method for controlling a powertrain system includes determining a first power range for output power of the energy storage device, commanding the engine to transition from a first engine state to a second engine state, and expanding the first power range of the energy storage device and controlling the torque machine based upon the expanded power range of the energy storage device during the transition from the first engine state to the second engine state. | 05-07-2009 |
20090118963 | METHOD FOR ALTITUDE-COMPENSATED TRANSMISSION SHIFT SCHEDULING - A powertrain system includes an engine coupled to a transmission operative in one of a plurality of operating range states to transfer power between the engine and an output member. A method for controlling the powertrain system includes monitoring an operator torque request, monitoring barometric pressure and engine input speed to the transmission, determining an achievable range of input power transferable from the engine to the transmission based upon the barometric pressure and the engine input speed, and determining a preferred operating range state for the transmission and a preferred engine operating point at the preferred operating range state based upon the operator torque request and the achievable range of input power. | 05-07-2009 |
20090118962 | 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. The method further includes providing a power range for opportunity charging and discharging of the energy storage device based on the first set of electric power limits. The method further includes providing a power range for controlling output power of the energy storage device based on the second set of electric power limits. | 05-07-2009 |
20090118957 | 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 torque transferred from the wheel through the driveline to the output member of the transmission. The torque machine is connected to an energy storage device. A method for operating a hybrid powertrain system includes monitoring an operator torque request input to an accelerator pedal, determining a minimum available power output of the energy storage device, determining a preferred output torque reacted through the output member to the driveline based upon the minimum available power output of the energy storage device, determining a regenerative braking torque capacity comprising a torque range between the preferred output torque reacted through the output member to the driveline and the operator torque request input to the accelerator pedal, and controlling operation of the hybrid powertrain based upon the regenerative braking torque capacity. | 05-07-2009 |
20090118954 | 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 difference between a commanded speed and a monitored operating speed of the auxiliary hydraulic pump. | 05-07-2009 |
20090118952 | CONTROL ARCHITECTURE AND METHOD FOR TWO-DIMENSIONAL OPTIMIZATION OF INPUT SPEED AND INPUT POWER INCLUDING SEARCH WINDOWING - A microprocessor driven two dimensional search engine examines transmission operating points within a plurality of search range spaces and assists in determining properties associated with the driveline at various operating points within the space. The size of the space is reduced by rearrangement of data. | 05-07-2009 |
20090118951 | METHOD FOR DEVELOPING A TRIP COST STRUCTURE TO UNDERSTAND INPUT SPEED TRIP FOR A HYBRID POWERTRAIN SYSTEM - A powertrain system includes an engine mechanically coupled to an electro-mechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states. A method for controlling the powertrain system includes determining a current transmission operating range state and engine state, determining at least one potential transmission operating range state and engine state, determining preferability factors associated with the current and potential transmission operating range state and the engine state wherein the preferability factors associated with potential transmission operating range states include transmission input speed trip preferability factors, preferentially weighting the preferability factors for the current transmission operating range state and engine state, and selectively commanding changing the present transmission operating range state and engine state based upon the preferability factors. | 05-07-2009 |
20090118949 | METHOD AND APPARATUS FOR DEVELOPING A DECELERATION-BASED SYNCHRONOUS SHIFT SCHEDULE - A method for controlling a powertrain includes monitoring a desired synchronous transmission shift during deceleration of an output member including a desired operating range state, monitoring an output speed, predicting output deceleration through the desired synchronous transmission shift, determining a penalty cost associated with the desired synchronous transmission shift based upon an input speed profile resulting from the predicted output deceleration and from the desired synchronous transmission shift, and executing the synchronous transmission shift based upon the penalty cost. | 05-07-2009 |
20090118948 | METHOD AND APPARATUS FOR MAXIMUM AND MINIMUM OUTPUT TORQUE PERFORMANCE BY SELECTION OF HYBRID RANGE STATE AND INPUT SPEED FOR A HYBRID POWERTRAIN SYSTEM - A powertrain system includes an engine mechanically coupled to an electro-mechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states. A method for controlling the powertrain system includes determining a current transmission operating range state and engine state, determining at least one potential transmission operating range state and engine state, providing an operator torque request, determining preferability factors associated with the current transmission operating range state and engine state, and potential transmission operating range states and engine states, preferentially weighting the preferability factors for the current transmission operating range state and engine state, and selectively commanding changing the current transmission operating range state and engine state based upon the preferability factors and the operator torque request. | 05-07-2009 |
20090118947 | 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 the powertrain system includes combining sets of preferability factors inputted from engine sensors in a microprocessor or computer with other preferability factors generated during engine and vehicle operation to provide an output for a transmission control module, which may execute an operating range or engine state change. | 05-07-2009 |
20090118946 | METHOD AND APPARATUS TO PROVIDE NECESSARY OUTPUT TORQUE RESERVE BY SELECTION OF HYBRID RANGE STATE AND INPUT SPEED FOR A HYBRID POWERTRAIN SYSTEM - A method for controlling a powertrain system includes determining a current transmission operating range state and engine state, determining at least one potential transmission operating range state and engine state, providing at least one operator torque request, determining preferability factors associated with the current transmission operating range state and engine state, and potential transmission operating range states and engine states, wherein determining preferability factors associated with potential transmission operating range states includes assigning biasing costs to operator torque requests which reside within a pre-determined range of possible operator torque requests for at least two of the potential transmission operating range states, preferentially weighting the preferability factors for the current transmission operating range state and engine state, and selectively commanding changing the transmission operating range state and engine state based upon stheaid preferability factors and the operator torque request. | 05-07-2009 |
20090118945 | METHOD FOR MANAGING LASH IN A DRIVELINE - A hybrid powertrain system includes a transmission device operative to transfer power between an input member, a torque machine and an output member, the output member coupled to a driveline coupled to a wheel to transfer tractive torque therebetween. A method for controlling the hybrid powertrain system includes monitoring an operator torque request, determining an operating range state of the transmission device, determining a net output torque to the output member based upon the operator torque request, determining a lash state of the driveline, and determining a command for transferring output torque to the output member based upon the operating range state of the transmission device, the net output torque, and the lash state of the driveline. | 05-07-2009 |
20090118944 | 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 method for controlling the hybrid transmission includes determining a preferred output torque, determining a relationship between power from the energy storage device and an output torque of the transmission, determining power constraints from the energy storage device, determining motor torque constraints for the torque machine, determining linear torque constraints to the output torque based upon the motor torque constraints for the torque machine, determining quadratic output torque constraints based upon the power constraints from the energy storage device and the relationship between the power from the energy storage device and the output torque of the transmission device, and determining an output torque to the output member responsive to the preferred output torque and achievable based upon the linear output torque constraints and the quadratic output torque constraints. | 05-07-2009 |
20090118943 | METHOD AND APPARATUS TO DETERMINE A PREFERRED OUTPUT TORQUE IN MODE AND FIXED GEAR OPERATION WITH CLUTCH TORQUE CONSTRAINTS FOR A HYBRID POWERTRAIN SYSTEM - A hybrid transmission is operative to transfer torque between an input member and torque machines and an output member in one of a plurality of fixed gear and continuously variable operating range states through selective application of torque transfer clutches. The torque machines are operative to transfer power from an energy storage device. A method for controlling the hybrid transmission includes operating the hybrid transmission in one of the operating range states, determining a first set of internal system constraints on output torque transferred to the output member, determining a second set of internal system constraints on the output torque transferred to the output member, and determining an allowable output torque range that is achievable within the first set of internal system constraints and the second set of internal system constraints on the output torque transferred to the output member. | 05-07-2009 |
20090118942 | METHOD FOR DETERMINING CONSTRAINTS ON INPUT TORQUE IN A HYBRID TRANSMISSION - A hybrid transmission includes torque machines and an energy storage device connected thereto. Thee hybrid transmission is operative to transfer power between an input member and an output member and the torque machines. A method for controlling the hybrid transmission includes monitoring operating parameters of the hybrid transmission, monitoring an operator demand for power, determining an output torque range to the output member based upon states of the operating parameters of the hybrid transmission, constraining the output torque range to the output member based upon the operator demand for power, and determining input torque constraints to the input member based upon the constrained output torque range to the output member. | 05-07-2009 |
20090118940 | METHOD FOR OPERATING A POWERTRAIN SYSTEM TO CONTROL ENGINE STABILIZATION - An engine is selectively operative in one of a plurality of engine states to transfer torque to an input member of a hybrid transmission. The hybrid transmission is operative to transfer torque between the input member and a torque machine and an output member to generate an output torque in response to an operator torque request. A method for controlling the engine includes monitoring the operator torque request, determining operating power costs associated with a plurality of candidate engine states in response to the operator torque request, determining transition costs for transitioning the engine from a present engine state to each of the candidate engine states, determining stabilization costs for operating the engine in the present engine state and subsequently operating the engine in each of the candidate engine states, and selecting a preferred engine state based upon the operating power costs, the transition costs, and the stabilization costs for the plurality of engine states. | 05-07-2009 |
20090118939 | METHOD FOR CONTROLLING AN ENGINE OF A HYBRID POWERTRAIN IN A FUEL ENRICHMENT MODE - An engine is coupled to an input member of a hybrid transmission. The hybrid transmission is operative to transfer torque between the input member and a torque machine and an output member to generate an output torque in response to an operator torque request. The torque machine is connected to an energy storage device. A method for controlling the engine includes monitoring the operator torque request, determining a maximum engine torque operating the engine at stoichiometry, determining a maximum motor torque output from the torque machine, determining a maximum output torque from the hybrid transmission when the torque machine is generating the maximum motor torque and the engine is generating the maximum engine torque operating at stoichiometry, and controlling the engine in a fuel enrichment mode when the operator torque request exceeds the maximum output torque from the hybrid transmission when the torque machine is generating the maximum motor torque and the engine is generating the maximum engine torque operating at stoichiometry. | 05-07-2009 |
20090118938 | 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 controlling a powertrain system includes monitoring a temperature of the energy storage device, selecting a candidate powertrain system operating point, determining an output power from the energy storage device associated with the candidate powertrain system operating point, determining a power loss for operating the powertrain system at the candidate powertrain system operating point, and determining operating costs for operating the powertrain system at the candidate powertrain system operating point associated with the power loss and based upon the temperature of the energy storage device. | 05-07-2009 |
20090118937 | 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 includes monitoring an operator torque request, determining a preferred main engine state and a preferred engine torque associated with the preferred engine state, determining an engine state transition path from a present main engine state to the preferred main engine state including an engine transition state, and executing the engine state transition path between the present main engine state and the preferred main engine state and adjusting engine torque to the preferred engine torque. | 05-07-2009 |
20090118936 | CONTROL OF ENGINE TORQUE DURING UPSHIFT AND DOWNSHIFT TORQUE PHASE FOR A HYBRID POWERTRAIN SYSTEM - A powertrain includes an electromechanical transmission mechanically-operatively coupled to an internal combustion engine and an electric machine adapted to selectively transmit mechanical power to an output member through selective application of a plurality of clutches. A method for controlling the powertrain includes commanding a shift from a fixed gear operating range state to a second operating range state, commanding decreased reactive torque through an off-going clutch during a torque phase of said commanded shift, and decreasing said reactive torque through said off-going clutch through control of engine input torque. | 05-07-2009 |
20090118935 | 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 states through selective application of torque transfer clutches and the engine is operatively coupled to a main hydraulic pump to supply pressurized fluid to a hydraulic circuit operative to apply the torque transfer clutches. A method for controlling the powertrain system includes determining an output torque request to the output member, determining a pressure output of the main hydraulic pump based upon an engine input speed, calculating a clutch reactive torque capacity for each applied torque transfer clutch based upon the pressure output of the main hydraulic pump, and determining a preferred engine input speed to achieve the clutch reactive torque capacity to meet the output torque request to the output member. | 05-07-2009 |
20090118934 | METHOD FOR DETERMINING A PREFERRED ENGINE OPERATION IN A HYBRID POWERTRAIN SYSTEM DURING BLENDED BRAKING - A hybrid transmission is operative to transfer power between an input member and a torque machine and an output member. A method for controlling the powertrain system during a braking event includes evaluating candidate input torques. An output torque reactable through the transmission to the driveline and limited within the range of permissible output torques is determined for the candidate engine input torque. A preferred input torque is determined. | 05-07-2009 |
20090118933 | 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 system includes monitoring an operator torque request, determining an output torque command and an output speed of the output member, iteratively selecting candidate input speeds to the input member, determining mechanical power loss in the hybrid transmission for each of the candidate input speeds and the output speed, and selecting a preferred input speed comprising the candidate input speed that achieves a minimum mechanical power loss in the hybrid transmission at the output speed. | 05-07-2009 |
20090118932 | ENGINE CONTROL SYSTEM FOR TORQUE MANAGEMENT IN A HYBRID POWERTRAIN SYSTEM - An engine is coupled to an input member of a hybrid transmission, the hybrid transmission operative to transfer power between the engine and a second torque machine and an output member. A method for controlling the engine includes monitoring an operator torque request, commanding operation of the hybrid transmission in a continuously variable operating range state, determining engine commands comprising a first engine torque request and a second engine torque request based upon the operator torque request and the operation of the hybrid transmission, determining an engine torque constraint comprising a maximum engine torque based upon a capacity of the hybrid transmission to react the engine torque, and controlling engine operation based upon the first engine torque request only when the second engine torque request exceeds the engine torque constraint. | 05-07-2009 |
20090118931 | METHOD AND APPARATUS TO REPROFILE INPUT 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 controlling the engine and electric machine during the shift, identifying an input acceleration constraint affecting one of the input acceleration profiles, reprofiling the input acceleration profiles based upon the identified input acceleration constraint, and controlling operation of the engine and electric machine based upon the reprofiled input acceleration profiles. | 05-07-2009 |
20090118930 | METHOD AND APPARATUS FOR DEVELOPING A CONTROL ARCHITECTURE FOR COORDINATING SHIFT EXECUTION AND ENGINE TORQUE CONTROL - A method for controlling a powertrain system including a transmission mechanically coupled to an engine and an electric machine to transfer power to an output member, the transmission selectively operative in one of a plurality of operating range states includes monitoring operator inputs to an accelerator pedal, determining a preferred operating point of the powertrain based upon the operator inputs, determining a preferred operating range state of the transmission based upon the preferred operating point, determining lead control signals for the engine and the transmission based upon the preferred operating point and the preferred operating range state of the transmission, determining immediate control signals for the electric machine and the transmission, wherein the immediate control signals are based upon a lead period calibrated to a difference in control signal reaction times of the engine and the electric machine in order to effect changes to an actual electric machine output substantially simultaneously with changes to an actual engine output, controlling operation of the engine based upon the lead control signals for the engine and the transmission, and controlling operation of the electric machine based upon the immediate control signals for the electric machine and the transmission. | 05-07-2009 |
20090118929 | 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 accelerator output torque request, an immediate brake output torque request, a predicted brake output torque request, and an axle torque response type are determined. An output torque command to the output member of the transmission is determined based upon the immediate accelerator output torque request and the immediate brake output torque request. | 05-07-2009 |
20090118927 | METHOD FOR CONTROLLING A SPEED LEVEL AND TORQUE OF AN ENGINE WITHIN A POWERTRAIN - A method to determine a preferred operating point for an internal combustion engine includes determining a current set of candidate operating points for a current search iteration. The method further includes iteratively determining an operating cost for operating the internal combustion engine at each candidate operating point of the current search iteration, and determining the preferred operating point for operating the internal combustion engine after a predetermined number of search iterations. | 05-07-2009 |
20090118926 | METHOD FOR CONTROLLING INPUT TORQUE PROVIDED TO A TRANSMISSION - A method for controlling an input torque provided to a transmission includes executing a first iterative search within a first range of permissible torque values to determine a first torque value based on a first cost value. The first cost value is based on a first set of powertrain measurements measured at a first time. A second cost value based on a second torque value and the first set of powertrain measurements measured at the first time is calculated. The second torque value is determined using a second set of powertrain measurements measured at a second time prior to the first time. One of the first torque value and the second torque value is then selected based on the first cost value and the second cost value. | 05-07-2009 |
20090118924 | 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 transmission includes determining minimum and maximum motor torque constraints for the first and second electric machines, and determining available battery power in terms of battery power constraints. One of a first, a second and a third case is determined based upon the motor torque constraints and the battery power constraints. A preferred output torque is determined for transmitting to the output member of the electro-mechanical transmission. | 05-07-2009 |
20090118923 | METHOD FOR CONTROLLING A POWERTRAIN SYSTEM BASED ON PENALTY COSTS - A method for controlling a powertrain system includes monitoring an operator torque request, selecting a candidate powertrain system operating point, and determining a preferred engine torque range, a preferred torque machine torque range, and a preferred energy storage device output power range. The method further includes determining an engine torque, a torque machine torque, and an energy storage device output power based upon the operator torque request and the candidate powertrain system operating point. Power costs for operating the powertrain at the candidate powertrain system operating point are determined based on the determined engine torque, the determined torque machine torque, and the determined energy storage device output power range. Penalty costs are determined relative to the preferred engine torque range, the preferred torque machine torque range, and the preferred energy storage device output power range for operating the powertrain at the candidate powertrain system operating point. And, an operating cost for operating the powertrain at the candidate powertrain system operating point is determined based on the power costs and the penalty costs | 05-07-2009 |
20090118922 | 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 microprocessor or computer with other preferability factors generated during engine and vehicle operation to provide an output for a transmission control module, which may execute an operating range or engine state change. Desirable input speeds for a transmission are determined by defining minimum input speeds for each potential transmission operating range state, and ascribing biasing costs to potential transmission input speeds which are slower than the minimum input speeds defined for each potential transmission operating range state. A single transmission input speed is selected and preferability factors are determined, which are preferentially weighted to enable selective commandment of changes in the transmission operating range state and engine state. | 05-07-2009 |
20090118920 | OPTIMAL SELECTION OF HYBRID RANGE STATE AND/OR INPUT SPEED WITH A BLENDED BRAKING SYSTEM IN A HYBRID ELECTRIC VEHICLE - A method for operating a vehicle includes determining a transmission input speed, operating the transmission using the transmission input speed, and providing a braking torque request to cause braking of the vehicle according to a scheme selected from the group consisting of a first braking mode and a second braking mode. The transmission input speed and the transmission operating range state are dependent on said braking torque request in the first braking mode, and wherein the transmission operating state, but not the transmission input speed, is dependent on the braking torque request in the second braking mode. | 05-07-2009 |
20090118919 | METHOD FOR DETERMINING INERTIA EFFECTS FOR A HYBRID POWERTRAIN SYSTEM - A method for controlling a hybrid powertrain system based upon determined inertial effects for a continuously variable operating range state includes monitoring an operator torque request and a rotational speed of the output member, determining an inertial effect on an input speed of the input member for a continuously variable operating range state, and controlling motor torque outputs from the electric machines to meet the operator torque request based upon the inertial effect on the input speed of the input member. | 05-07-2009 |
20090118918 | METHOD FOR STABILIZATION OF OPTIMAL INPUT SPEED IN MODE FOR A HYBRID POWERTRAIN SYSTEM - A method for improving drivability of the powertrain system having an accelerator control includes determining a first transmission input speed having an associated first power loss and operating said transmission using said first transmission input speed. An operational parameter relating to said accelerator control is determined and a second transmission input speed responsive to said operational parameter and having an associated second power loss is determined. The value of at least one of said first and second power loss is biased based on said operational parameter. The first power loss is compared to said second power loss subsequent to the biasing. A third transmission input speed is determined and the transmission is operated using the third transmission input speed. | 05-07-2009 |
20090118915 | METHOD AND APPARATUS TO PRIORITIZE TRANSMISSION OUTPUT TORQUE AND INPUT ACCELERATION FOR A HYBRID POWERTRAIN SYSTEM - A powertrain includes an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and an electric machine adapted to selectively transmit mechanical power to an output member. A method for controlling the powertrain includes operating the transmission in an operating range state wherein input speed can operate independent of output speed and wherein a reactive torque is transmitted through the transmission. The method further includes monitoring commands affecting a requested output torque, monitoring a calculated output torque, and prioritizing between an input acceleration of the transmission and an output torque of the transmission based upon whether operating the transmission in the operating range state is in transient operation or stable operation. | 05-07-2009 |
20090118914 | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE FOR A HYBRID POWERTRAIN SYSTEM - A hybrid powertrain system includes an internal combustion engine operatively connected to a second torque machine to transmit torque to an output member. A method for operating the hybrid powertrain system includes monitoring an operator torque request, determining an output torque command based upon the operator torque request, commanding a transition between an engine-off state and an engine-on state, monitoring an engine crank angle, spinning the engine unfueled, estimating cylinder pressure based upon the engine crank angle during the spinning of the engine, predicting a cylinder pulse torque based upon the cylinder pressure, determining a cancellation torque for the second torque machine based upon the predicted cylinder pulse torque, and controlling motor torque output from the second torque machine based upon the cancellation torque and the output torque command. | 05-07-2009 |
20090118901 | METHOD AND APPARATUS FOR SECURING OUTPUT TORQUE IN A DISTRIBUTED CONTROL MODULE SYSTEM FOR A POWERTRAIN SYSTEM - A method to monitor integrity of a motor torque command for a transmission in a hybrid powertrain system includes calculating motor torque commands for the torque generating machines. Torque corrections for the motor torque commands are determined. The motor torque commands are adjusted based upon the torque corrections. The adjusted motor torque commands are verified based upon an estimated output torque. | 05-07-2009 |
20090118888 | METHOD FOR CONTROLLING REGENERATIVE BRAKING IN A VEHICLE - A vehicle includes a friction braking system and a powertrain system including a torque machine operative to react tractive torque input from a wheel of the vehicle. A method for controlling braking in a vehicle includes monitoring operation of the powertrain system, determining a driver intended total brake torque, determining a regenerative braking capacity based upon the operation of the powertrain system, determining a regenerative braking request based upon a time-rate change in the regenerative braking capacity, and determining a motor torque command for the torque machine based upon the regenerative braking request. | 05-07-2009 |
20090118887 | 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 tractive torque with the driveline. A method for controlling regenerative braking and friction braking includes monitoring a vehicle operating point, determining a braking torque request, determining a regenerative braking motor torque ratio based upon the vehicle operating point wherein the regenerative braking motor torque ratio is non-linearly dependent on the vehicle operating point, and actuating the friction brake based upon the regenerative braking motor torque ratio and the braking torque request. | 05-07-2009 |
20090118886 | 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 member and a torque machine and an output member coupled to a driveline. A method for operating the vehicle includes monitoring operator inputs to an accelerator pedal and a brake pedal, monitoring vehicle speed, maintaining the transmission in a present operating range state subsequent to the operator disengaging the accelerator pedal absent the operator engaging the brake pedal, transitioning the transmission device to a continuously variable operating range state subsequent to the operator disengaging the accelerator pedal and the operator engaging the brake pedal, executing regenerative braking by controlling the torque machine to react torque through the transmission to brake the vehicle through the driveline when the operator engages the brake pedal and the speed of the vehicle is greater than a first threshold, and disabling the regenerative braking when the operator disengages the brake pedal and subsequently reengages the brake pedal when the speed of vehicle is less than a first threshold and greater less than a second threshold. | 05-07-2009 |
20090118885 | SYSTEM ARCHITECTURE FOR A BLENDED BRAKING SYSTEM IN A HYBRID POWERTRAIN SYSTEM - An engine and a second power generating device transmit power through a transmission to a driveline to a wheel. A control module determines a regenerative braking axle torque capacity and a regenerative braking torque. Power output from the second power generating device is controlled based upon a regenerative braking axle torque request. A brake control module determines a total braking torque request and generates the regenerative braking axle torque request based upon the total braking torque request, the regenerative braking axle torque capacity, and the regenerative braking torque. The brake control module controls a friction brake. | 05-07-2009 |
20090118884 | METHOD FOR CONTROLLING A POWERTRAIN SYSTEM BASED UPON TORQUE MACHINE 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 controlling the powertrain system include monitoring a temperature of the torque machine, selecting a candidate powertrain system operating point, determining an electrical power input and a motor power output of the torque machine for the candidate powertrain system operating point, determining a power loss for the torque machine associated with the motor power output of the torque machine and the electrical power input, and determining operating costs for operating the powertrain system at the candidate powertrain system operating point associated with the power loss from the torque machine and based upon the temperature of the torque machine. | 05-07-2009 |
20090118882 | CONTROL ARCHITECTURE FOR OUTPUT TORQUE SHAPING AND MOTOR TORQUE DETERMINATION FOR A HYBRID POWERTRAIN SYSTEM - A powertrain system includes a transmission device operative to transfer power between an input member and a plurality of torque machines and an output member. The torque machines are connected to an energy storage device and the transmission device is operative in one of a plurality of operating range states. A method for controlling the powertrain system includes monitoring available power from the energy storage device, determining system constraints, determining constraints on an output torque to the output member based upon the system constraints and the available power from the energy storage device, determining an operator torque request, determining an output torque command based upon the constraints on the output torque and the operator torque request, and determining preferred torque commands for each of the torque machines based upon the output torque command. | 05-07-2009 |
20090118877 | CREATION AND DEPLETION OF SHORT TERM POWER CAPABILITY IN A HYBRID ELECTRIC VEHICLE - Short term power limits of an electrical energy storage device are progressively tightened toward long term power limits in accordance with net energy flow or magnitude or duration metrics. | 05-07-2009 |
20090118094 | METHOD FOR DETERMINING INPUT SPEED ACCELERATION LIMITS IN A HYBRID TRANSMISSION - A powertrain system includes a transmission operative to transfer power between an input member and first and second torque machines and an output member. The first and second torque machines are connected to an energy storage device and the transmission is operative in a continuously variable operating range state. A method for controlling the powertrain system includes selecting an independently controllable parameter for the powertrain system, determining maximum and minimum motor torque constraints for the first and second torque machines and determining maximum and minimum power constraints for the energy storage device, determining maximum and minimum states for the independently controllable parameter for the powertrain system, and determining an achievable operating range for a parameter of interest based upon the maximum and minimum states for the independently controllable parameter for the powertrain system, the maximum and minimum motor torque constraints for the first and second torque machines and the maximum and minimum power constraints for the energy storage device. | 05-07-2009 |
20090118093 | CONTROL SYSTEM FOR ENGINE TORQUE MANAGEMENT FOR A HYBRID POWERTRAIN SYSTEM - An engine is mechanically coupled to a transmission device, the transmission device operative to transfer mechanical power between the engine and a second power generating device and an output member. A method for controlling the engine includes monitoring an operator demand for power, selecting a preferred engine state, determining a preferred engine torque input to the transmission device when operating in the preferred engine state based upon the operator demand for power, determining constraints on the engine torque input to the transmission device based upon a capacity of the transmission device to react the engine torque input, and commanding operation of the engine to the preferred engine state and commanding the engine torque input to the transmission device based upon the preferred engine torque input and the constraints on the engine torque input. | 05-07-2009 |
20090118091 | METHOD AND APPARATUS TO CONTROL TEMPERATURE OF AN EXHAUST AFTERTREATMENT SYSTEM FOR A HYBRID POWERTRAIN - An internal combustion engine is fluidly connected to an exhaust aftertreatment system and operatively connected to an electro-mechanical transmission to transmit tractive power to a driveline. The engine is controlled during an engine operating cycle by determining a temperature of the exhaust aftertreatment system and adjusting power output of the engine based upon the temperature of the exhaust aftertreatment system and a preferred temperature range of the exhaust aftertreatment system. The electro-mechanical transmission is controlled to transmit tractive power to the driveline to meet an operator torque request based upon the adjusted power output of the engine. | 05-07-2009 |
20090118090 | METHOD AND APPARATUS TO CONTROL ENGINE TEMPERATURE FOR A HYBRID POWERTRAIN - An internal combustion engine is connected to a transmission to transmit tractive power to a driveline. Engine coolant temperature is determined, and power output of the engine is adjusted based upon the coolant temperature and preferred coolant temperature range. The transmission is controlled to transmit tractive power to the driveline to meet an operator torque request based upon the adjusted power output of the engine. | 05-07-2009 |
20090118089 | METHOD FOR LOAD-BASED STABILIZATION OF MODE AND FIXED GEAR OPERATION OF A HYBRID POWERTRAIN SYSTEM - A powertrain system includes an engine mechanically coupled to an electromechanical transmission selectively operative in one of a plurality of transmission operating range states and one of a plurality of engine states. A method for controlling the powertrain system includes determining a current transmission operating range state and engine state, determining at least one potential transmission operating range state and engine state, determining preferability factors associated with the current and potential transmission operating range state and the engine state wherein the preferability factors associated with potential transmission operating range states include load-stabilizing preferability factors, preferentially weighting the preferability factors for the current transmission operating range state and engine state, and selectively commanding changing the present transmission operating range state and engine state based upon the preferability factors. | 05-07-2009 |
20090118087 | SYSTEM CONSTRAINTS METHOD OFCONTROLLING OPERATION OF AN ELECTRO-MECHANICAL TRANSMISSION WITH AN ADDITIONAL CONSTRAINT RANGE - A method for controlling an electromechanical 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 output member is determined that is achievable within the motor torque constraints, within a range for an additional torque input and based upon the battery power constraints. | 05-07-2009 |
20090118086 | METHOD AND APPARATUS TO OFFLOAD OFFGOING CLUTCH TORQUE WITH ASYNCHRONOUS ONCOMING CLUTCH TORQUE, ENGINE AND MOTOR TORQUE FOR A HYBRID POWERTRAIN SYSTEM - A powertrain includes an electromechanical transmission mechanically-operatively coupled to an internal combustion engine and an electric machine adapted to selectively transmit mechanical power to an output member. A method for controlling the powertrain includes commanding a shift from a first operating range state to a second operating range state, identifying an off-going clutch, controlling torque output from said electric machine to offload reactive torque transmitted through said off-going clutch, selectively applying an oncoming clutch to offload reactive torque transmitted through said off-going clutch, and reducing a clutch torque capacity of said off-going clutch when said reactive torque transmitted through said off-going clutch is substantially zero. | 05-07-2009 |
20090118085 | METHOD AND APPARATUS FOR ADAPTING ENGINE OPERATION IN A HYBRID POWERTRAIN SYSTEM - 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 includes, monitoring operation of the hybrid transmission, determining motor torque offsets for the torque machines, transforming the motor torque offsets for the torque machines to an input torque offset and an output torque offset of the hybrid transmission, and adjusting operation of the engine based upon the input torque offset and the output torque offset of the hybrid transmission. | 05-07-2009 |
20090118084 | METHOD AND APPARATUS TO PERFORM ASYNCHRONOUS SHIFTS WITH ONCOMING SLIPPING CLUTCH TORQUE FOR A HYBRID POWERTRAIN SYSTEM - A method to control a powertrain including a transmission, an engine, and an electric machine includes monitoring a desired transmission shift including an oncoming clutch, monitoring operational parameters of the powertrain, monitoring a maximum electric machine torque capacity, determining a desired output torque profile through the desired transmission shift, determining a maximum electric machine torque capability profile through the desired transmission shift based upon the maximum electric machine torque capacity and the operational parameters, comparing the desired output torque profile to the maximum electric machine torque capability profile, determining a preferred oncoming clutch torque profile through the desired transmission shift based upon the comparing, and executing a clutch assisted shift based upon the preferred oncoming clutch torque profile. | 05-07-2009 |
20090118083 | 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 system based upon the rotational speed of the engine and the temperature of the transmission fluid, determining a predicted clutch torque capacity based upon the maximum hydraulic pressure, generating a preferred input torque from the engine based upon the predicted clutch torque capacity, and utilizing the preferred input torque to control the engine. | 05-07-2009 |
20090118082 | 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, determining a clutch slip acceleration profile based upon the constraints on the input acceleration, determining an input acceleration profile based upon the clutch slip acceleration profile, and controlling the powertrain based upon the clutch slip acceleration profile and the input acceleration profile. | 05-07-2009 |
20090118081 | METHOD FOR CONTROLLING POWER ACTUATORS IN A HYBRID POWERTRAIN SYSTEM - A method for controlling a powertrain system includes controlling a first power actuator based upon a set of power constraints for the first power actuator. The method further includes controlling a second power actuator based upon the set of power constraints for the second power actuator. | 05-07-2009 |
20090118080 | 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 constraint of the first power actuator based on the estimated output power of the energy storage device when the output power of the energy storage power transgresses the preferred power limit. | 05-07-2009 |
20090118079 | METHOD FOR CONTROLLING VOLTAGE WITHIN A POWERTRAIN SYSTEM - A method for controlling a powertrain system includes monitoring voltage of an energy storage device. The method further includes modifying a preferred voltage limit when the voltage of the energy storage device transgresses a trigger voltage limit, and determining the power constraint of a first power actuator based on the estimated output power of the energy storage device when the voltage of the energy storage device transgresses the preferred voltage limit. | 05-07-2009 |
20090118078 | METHOD AND APPARATUS FOR CONTROLLING A HYBRID POWERTRAIN SYSTEM - A control method for vehicular hybrid powertrain system includes monitoring operator inputs to an accelerator pedal and a transmission gear selector, and determining an operator torque request based upon the operator inputs to the accelerator pedal and the transmission gear selector. Torque output from the electric machine is commanded based upon the operator torque request. Engine output is controlled based upon the operator torque request and the commanded torque output from the electric machine. Vehicle hood position is monitored and the engine output is controlled correlative to the operator input to the accelerator pedal when the monitored position of the vehicle hood is open and the operator input to the transmission gear selector is one of a PARK and a NEUTRAL position. | 05-07-2009 |
20090118077 | 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 within the motor torque constraints and based upon the additional constraint and the battery power constraints. | 05-07-2009 |
20090118076 | 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 transmission, determining a system power cost, selecting a preferred cost and corresponding engine operating points, selecting a preferred operating range state, selecting the engine state, and controlling the engine based upon the selected operating range state, the selected engine state, and the engine operating points. | 05-07-2009 |
20090118075 | 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 the transmissions, determining motor torque outputs from the electrical machines and an engine based upon the inertial effects, and selecting a preferred operating range state and a preferred input speed from the engine to the transmission based upon the operator torque request and the inertial effects. | 05-07-2009 |
20090118074 | METHOD AND APPARATUS TO MONITOR ROTATIONAL SPEEDS IN AN ELECTRO-MECHANICAL TRANSMISSION - A powertrain includes an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and an electric machine to selectively transmit mechanical power to an output member. Powertrain operation includes monitoring operator inputs, and determining input speeds and changes in input speeds for the internal combustion engine and the electric machine. The input speeds are compared to threshold input speeds, and the changes in input speeds are compared to threshold changes in input speeds. Input torques of the internal combustion engine and the electric machine are reduced when any one of the input speeds and changes in input speeds exceeds the corresponding threshold. | 05-07-2009 |
20090115408 | 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 determined. Angular velocity is calculated between contiguous pairs of the discrete angular positions. A velocity correction is determined, and a rotational angle error term is determined based upon the velocity correction. | 05-07-2009 |
20090115377 | METHOD OF EXTERNALLY CHARGING A POWERTRAIN - A method of externally charging a powertrain includes monitoring a voltage level of a first battery, determining when the monitored voltage level is below a first voltage threshold, and when the monitored voltage level is below the first voltage threshold, charging the first battery by supplying power from an external power source and increasing voltage of the power supplied by the external power source within the powertrain. | 05-07-2009 |
20090115373 | 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. | 05-07-2009 |
20090115365 | METHOD OF DETERMINING TORQUE LIMIT WITH MOTOR TORQUE AND BATTERY POWER CONSTRAINTS - A method to determine a limit torque associated with an electro-mechanical transmission includes determining electric motor torque constraints and battery power constraints. A limit torque function and a standard form of the limit torque function are determined. The limit torque function and the motor torque constraints and the battery power constraints are transposed to the standard form to determine a limit torque. | 05-07-2009 |
20090115353 | METHOD OF DETERMINING OUTPUT TORQUE LIMITS OF A HYBRID TRANSMISSION OPERATING IN A FIXED GEAR OPERATING RANGE STATE - A hybrid transmission is operative to transfer power between an input member and first and second torque machines and an output member in a fixed gear operating range state. The first and second torque machines are connected to an energy storage device. A method for controlling the hybrid transmission includes determining an output torque command at the output member, determining motor torque constraints for the first and second torque machines and determining power constraints for the energy storage device, iteratively selecting candidate input torques transferable to the input member and associated output torques, determining a second torque constraint associated with the candidate input torque, determining a third torque constraint associated with the candidate input torque, and determining a preferred input torque comprising the candidate input torque that achieves the commanded output torque at the output member and satisfies the motor torque constraints for the first and second torque machines, satisfies the power constraints for the energy storage device, and satisfies the second and third torque constraints associated with the candidate input torque when operating in the fixed gear operating range state. | 05-07-2009 |
20090115352 | 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 determining an output torque request, determining a closed loop speed error, determining motor torque offsets to the torque machines based upon the closed loop speed error, determining output torque constraints based upon the motor torque offsets and the system operation, determining an output torque command based upon the output torque request and the output torque constraints, determining preferred motor torque commands for the torque machines based upon the output torque command, reducing the preferred motor torque commands for the torque machines using the motor torque offsets to the torque machines, and adjusting the reduced preferred motor torque commands for the torque machines based upon the closed loop speed error. | 05-07-2009 |
20090115350 | 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, transformed to a second coordinate system and simultaneously solved. An achievable torque operating region is determined. | 05-07-2009 |
20090115349 | METHOD AND CONTROL ARCHITECTURE TO DETERMINE MOTOR TORQUE SPLIT IN FIXED GEAR OPERATION FOR A HYBRID POWERTRAIN SYSTEM - An electro-mechanical transmission is operative to transmit mechanical torque originating from an engine and first and second electric machines to an output member. The electric machines are electrically-operatively connected to an energy storage system for electrical power flow therebetween. A Method for operating the electro-mechanical transmission includes operating the electro-mechanical transmission in a fixed gear operating range state, determining a minimum power flow between the energy storage system and the first and second electric machines to meet an operator torque request based upon electrical power constraints and motor torque constraints, commanding a motor torque from the first electric machine based upon the minimum power flow, and commanding a motor torque from the second electric machine based upon the minimum power flow, a torque input from the engine and the commanded motor torque from the first electric machine to meet the operator torque request in the fixed gear operating range state. | 05-07-2009 |
20090112495 | METHOD FOR ESTIMATING BATTERY LIFE IN A HYBRID POWERTRAIN - A method for estimating an operating life for an electrical energy storage system electrically connected to transmit power to a hybrid powertrain system includes monitoring temperature state-of-charge and electric current of the electrical energy storage system, calculating a battery life metric for a time interval based upon the temperature, the state-of-charge, and the electric current discharge, determining a total battery life metric therefrom and determining the remaining operating life of the electrical energy storage system. | 04-30-2009 |
20090112428 | METHOD AND APPARATUS TO DETERMINE CLUTCH SLIPPAGE IN AN ELECTRO-MECHANICAL TRANSMISSION - A method to determine excessive clutch slippage in a transmission coupled to an engine and an electric machine adapted to selectively transmit power to an output member through selective application of torque-transfer clutches includes monitoring rotational velocities of the electric machine, engine and output member, monitoring a transmission operating range state, determining a clutch slip based upon monitored rotational velocities for one of the torque-transfer clutches intended to be synchronized based upon the transmission operating range state, and indicating a runaway slip event if the clutch slip is in excess of a threshold slip level through a threshold slip duration. | 04-30-2009 |
20090112427 | METHOD AND APPARATUS FOR REMEDIATION OF AND RECOVERY FROM A CLUTCH SLIP EVENT IN A HYBRID POWERTRAIN SYSTEM - A method for operating a powertrain, including an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and an electric machine, includes monitoring slip across a selectively applied clutch within the transmission to indicate a clutch slip event, and if the monitoring indicates the clutch slip event decreasing a load across the selectively applied clutch by reducing torque of at least one of the engine and the electric machine, in order to reduce the slip, thereby ending the clutch slip event. | 04-30-2009 |
20090112423 | 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 serving a number of hydraulic oil consuming functions includes monitoring minimum hydraulic pressure requirements for each of the functions, determining a requested hydraulic pressure based upon the monitoring minimum hydraulic pressure requirements and physical limits of the hydraulic control system including a maximum pressure, determining a desired flow utilizing a hydraulic control system flow model based upon the requested hydraulic pressure, and utilizing the desired flow to control an auxiliary hydraulic pump. | 04-30-2009 |
20090112422 | METHOD AND APPARATUS TO CONTROL LOGIC VALVES FOR HYDRAULIC FLOW CONTROL IN AN ELECTRO-MECHANICAL TRANSMISSION - A method for controlling an electromechanical transmission includes monitoring a current hydraulic circuit oil temperature, monitoring a current state of flow management valves, monitoring a command for cooling of electric machines, monitoring a desired transmission operating range state, utilizing a state machine to determine a sequence for controlling positions of the flow management valves to achieve the desired transmission operating range state based upon the monitored properties. | 04-30-2009 |
20090112421 | METHOD AND APPARATUS TO CONTROL HYDRAULIC LINE PRESSURE IN AN ELECTRO-MECHANICAL TRANSMISSION - A method for controlling hydraulic line pressure of a hydraulic control system in transmission includes determining an available flow from a plurality of hydraulic pumps, determining a flow consumption of functions served by the hydraulic control system, determining an estimated hydraulic line pressure based upon the flow from the pumps and the flow consumption, determining a desired hydraulic line pressure, and controlling the hydraulic pumps based upon the desired hydraulic line pressure and the estimated hydraulic line pressure. | 04-30-2009 |
20090112420 | METHOD AND APPARATUS FOR MONITORING A TRANSMISSION RANGE SELECTOR IN A HYBRID POWERTRAIN TRANSMISSION - A method to monitor integrity of a signal output from an operator-manipulable transmission range selector for a powertrain system includes equipping the transmission range selector with a range encoder and a direction encoder, determining a range state and a direction state based upon signals from the range encoder and the direction encoder, determining a discrete position of the transmission range selector based upon the range state and the direction state, and performing back rationality to verify the discrete position of the transmission range selector. | 04-30-2009 |
20090112419 | METHOD AND APPARATUS TO CONTROL OFF-GOING CLUTCH TORQUE DURING TORQUE PHASE FOR A HYBRID POWERTRAIN SYSTEM - A method for controlling an electro-mechanical transmission through an unlocking state of a clutch, the transmission mechanically-operatively coupled to an internal combustion engine and an electric machine adapted to selectively transmit mechanical power to an output member includes decreasing a reactive torque acting upon the clutch, including overriding torque commands to the engine and to the electric machine, and simultaneously decreasing a clutch torque capacity, including, during a lead period selected according to an engine command reaction time, commanding an intermediate clutch torque command maintaining sufficient clutch torque capacity to exceed an initial reactive torque calculated at an initiation of the unlocking state, and following the lead period, decreasing through a ramp down the clutch torque capacity, maintaining sufficient clutch torque capacity to exceed the decreasing reactive torque. | 04-30-2009 |
20090112418 | 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 to a second operating range state, and monitoring a torque equation for the present operating range state. | 04-30-2009 |
20090112417 | METHOD AND APPARATUS TO PRODUCE A SMOOTH INPUT SPEED PROFILE IN MODE FOR A HYBRID POWERTRAIN SYSTEM - A method for controlling a powertrain including an electro-mechanical transmission coupled to an engine and an electric machine includes monitoring a desired input speed; signal processing the desired input speed to create a lead control signal to control the engine, wherein the signal processing includes low pass filtering the desired input speed and applying system constraint limits upon the desired input speed; signal processing the desired input speed to create an immediate control signal to control the electric machine, wherein the signal processing includes delaying the desired input speed by a lead period, low pass filtering the desired input speed, and applying system constraint limits upon the desired input speed; and controlling the powertrain through a powertrain transition based upon the lead control signal and said immediate control signal. | 04-30-2009 |
20090112399 | METHOD AND APPARATUS FOR MONITORING SOFTWARE AND SIGNAL INTEGRITY IN A DISTRIBUTED CONTROL MODULE SYSTEM FOR A POWERTRAIN SYSTEM - A method to monitor integrity of a signal generated and communicated in a distributed control module system for a hybrid powertrain system includes generating and verifying signal within an originating control module. A message is generated based upon the signal. The message is transmitted and received at a receiving control module. The signal is extracted from the message and its integrity is verified. | 04-30-2009 |
20090112392 | METHOD AND APPARATUS FOR MONITORING PROCESSOR INTEGRITY IN A DISTRIBUTED CONTROL MODULE SYSTEM FOR A POWERTRAIN SYSTEM - A method for monitoring a main control module operative to command first and second motor control processors of a hybrid powertrain system includes signally connecting a programmable logic device to the main control module and the first and second motor control processors, communicating a first seed signal from the programmable logic device to the main control module, and determining an invalid key signal in the main control module in response to the first seed signal. The invalid key signal is communicated to the programmable logic device. | 04-30-2009 |
20090112385 | 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 a first filter response time when the first power constraint changes in a first direction, and filtering the first power constraint utilizing a second filter response time when the first power constraint changes in a second direction. | 04-30-2009 |
20090111645 | METHOD AND APPARATUS TO CREATE A PSEUDO TORQUE PHASE DURING ONCOMING CLUTCH ENGAGEMENT TO PREVENT CLUTCH SLIP FOR A HYBRID POWERTRAIN SYSTEM - A method for controlling a powertrain comprising an electro-mechanical transmission mechanically-operatively coupled to an engine and an electric machine adapted to selectively transmit mechanical power to an output member through selective application of a plurality of torque-transfer clutches includes monitoring a clutch slip speed, synchronizing an oncoming clutch, and constraining reactive clutch torque limits for the oncoming clutch to achieve a reactive clutch torque that is less than an estimated clutch torque capacity. | 04-30-2009 |
20090111644 | METHOD AND APPARATUS FOR CLUTCH TORQUE CONTROL IN MODE AND FIXED GEAR FOR A HYBRID POWERTRAIN SYSTEM - A method for controlling hydraulic line pressure of a hydraulic control system in an electromechanical transmission mechanically-operatively coupled to an internal combustion engine and an electric machine adapted to selectively transmit mechanical power to an output member via selective application of a plurality of hydraulically-applied torque transfer clutches includes monitoring requirements for transmission of clutch reactive torque in one of the clutches, monitoring a hydraulic line pressure within the hydraulic control system, determining a minimum clutch torque capacity required to keep the clutch from slipping, determining a hydraulic line pressure required to create the minimum clutch torque capacity, and modulating hydraulic line pressure applied to the clutch by modulating operation of the hydraulic control system based upon the hydraulic line pressure required to create the minimum clutch torque capacity. | 04-30-2009 |
20090111643 | METHOD AND APPARATUS TO CONTROL CLUTCH FILL PRESSURE IN AN ELECTRO-MECHANICAL TRANSMISSION - A method to control a powertrain including a transmission, an engine, and an electric machine includes applying through a series of clutch fill events a series of incrementally changing command pressures in a pressure control solenoid controllably connected to a clutch within the transmission, monitoring a pressure switch fluidly connected to the pressure control solenoid and configured to indicate when the pressure switch is in a full feed state, determining changes in cycle times of the pressure switch corresponding to sequential applications of the series of incrementally changing command pressures, selecting a preferred command pressure to achieve a transient state in the clutch based upon the changes in pressure switch cycle times, and controlling the clutch based upon the preferred command pressure. | 04-30-2009 |
20090111642 | METHOD AND APPARATUS TO CONTROL CLUTCH STROKE VOLUME IN AN ELECTRO-MECHANICAL TRANSMISSION - A method for controlling a powertrain comprising a transmission coupled to an engine and an electric machine adapted to selectively transmit mechanical power to an output member via selective application of a plurality of hydraulically actuated torque transfer clutches includes filling one of the hydraulic clutches to a reference fill volume expected to create a touching state in the clutch, wherein the filling is accomplished through control of a pressure control solenoid, monitoring an actual fill time of the hydraulic clutch, monitoring a flow utilized in the filling, determining a measured fill volume based upon the actual fill time and the flow, calculating a fill volume error based upon the measured fill volume and the reference fill volume, and adjusting the reference fill volume based upon the fill volume error. | 04-30-2009 |
20090107755 | 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 transmit mechanical power to an output membe, includes monitoring a temperature of the electric machine, determining a cooling flow requirement for the cooling circuit based upon the temperature of the electric machine, comparing the cooling flow requirement to a threshold cooling flow, and requesting active electric machine cooling of the electric machine based upon the comparing. | 04-30-2009 |
20090107745 | METHOD AND SYSTEM FOR MONITORING SIGNAL INTEGRITY IN A DISTRIBUTED CONTROLS SYSTEM - A method to monitor integrity of a signal in a distributed control system for a powertrain system includes communications link transmitting signals between control modules. Integrity of each of the control modules is monitored. The signal is generated and verified in an originating control module and transmitted to a receiving control module whereat it is subsequently verified. | 04-30-2009 |
20090105914 | METHOD AND SYSTEM FOR INHIBITING OPERATION IN A COMMANDED OPERATING RANGE STATE FOR A TRANSMISSION OF A POWERTRAIN SYSTEM - A hybrid powertrain system includes torque generative devices to transfer power to an output member. An operator torque request, a rotational direction and speed of the output member, and a signal output from a transmission range selector are monitored. When a change in a direction of intended motion is determined, the powertrain system can change rotational direction of the output member when the speed of the output member is less than a threshold. The powertrain can inhibit a change in the rotational direction of the output member. | 04-23-2009 |
20090105898 | METHOD FOR MONITORING A MOTOR SPEED SENSOR - A method for detecting speed faults in a hybrid powertrain having engine and electric machine speed inputs includes directly sensing the engine and machine speeds and performing comparisons of sensed engine speed with engine speed determined based upon the machine speeds. | 04-23-2009 |
20090105896 | 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 energy storage device. A preferred output power to an output member is determined. A preferred charge state for operating the powertrain is concurrently selected with operating an engine in one of a cylinder deactivation state and an all-cylinder state based upon the effective state of charge and the preferred output power to the output member. | 04-23-2009 |