Patent application number | Description | Published |
20100168973 | System and Method for Controlling Lockup Clutch Engagement in a Torque Converter - A torque converter has a pump that is rotatably driven by an internal combustion engine and that is fluidly coupled to a turbine, and a lockup clutch connected between pump and the turbine. Controlling engagement of the lockup clutch may include controlling the lockup clutch to an initial lockup clutch activation value, determining rotational speed of the pump, determining rotational speed of the turbine, and if the rotational speed of the turbine is greater than the rotational speed of the pump, increasing rotational speed of the engine until the rotational speed of the pump is within a threshold value of the rotational speed of the turbine followed by controlling the lockup clutch to full engagement. | 07-01-2010 |
20100168976 | SYSTEM FOR CONTROLLING VEHICLE OVERSPEEDING VIA CONTROL OF ONE OR MORE EXHAUST BRAKE DEVICES - A method and system are provided for controlling overspeeding of a vehicle carrying an internal combustion engine having one or more exhaust brake devices controllable to apply braking torque to the engine. The system may be operable determine a desired speed of the vehicle, to determine a road speed of the vehicle, and if the road speed of the vehicle exceeds the desired speed of the vehicle by more than a threshold speed, to determine a target brake torque required to reduce the road speed of the vehicle speed to the desired speed of the vehicle, and to then control the one or more exhaust brake devices to apply the target brake torque to the engine to thereby control the road speed of the vehicle to the desired speed of the vehicle. | 07-01-2010 |
20140244116 | System for Controlling Vehicle Overspeeding Via Control of One or More Exhaust Brake Devices - A method and system are provided for controlling overspeeding of a vehicle carrying an internal combustion engine having one or more exhaust brake devices controllable to apply braking torque to the engine. The system may be operable determine a desired speed of the vehicle, to determine a road speed of the vehicle, and if the road speed of the vehicle exceeds the desired speed of the vehicle by more than a threshold speed, to determine a target brake torque required to reduce the road speed of the vehicle speed to the desired speed of the vehicle, and to then control the one or more exhaust brake devices to apply the target brake torque to the engine to thereby control the road speed of the vehicle to the desired speed of the vehicle. | 08-28-2014 |
Patent application number | Description | Published |
20090319143 | UP-SHIFT CONTROL IN AN AUTOMATIC TRANSMISSION WITH NEGATIVE INPUT TORQUE - A transmission control module including a shift control module that generates an enable signal when an up-shift is requested and the engine torque is below a threshold torque value. A turbine speed profile determination module that selectively generates a desired turbine speed profile. The shift control module controls a clutch pressure of an off-going clutch based on a measured turbine speed and the desired turbine speed profile when the enable signal is generated. | 12-24-2009 |
20100036572 | TORQUE CONVERTER CLUTCH CONTROL - A clutch control system comprises a clutch torque determination module and a clutch pressure control module. The clutch torque determination module determines a desired torque value for a torque converter clutch (TCC) based on a torque output of an engine, a pump torque value for a pump integrated with a torque converter, a desired engine acceleration, and an inertia value of the engine. The clutch pressure control module selectively controls pressure applied to the TCC based on the desired torque value. | 02-11-2010 |
20100063696 | System and Method for Controlling Engagement of a Lockup Clutch in a Torque Converter - A dynamic model is stored in memory that defines torque transmitted by the lockup clutch as a function of a plurality of torque converter operating parameters. A lockup clutch command is asserted to control engagement the lockup clutch, and thereafter a number of the plurality of torque converter operating parameters are monitored. A profile is selected of one of the plurality of torque converter operating parameters, and the profile is configured to result in an intersection of rotational speeds of the pump and the turbine over time when inserted into the model along with the monitored values of the number of torque converter operating parameters. The model is continually solved over time using the selected profile and the monitored operating parameters to produce transmitted torque values, and the lockup clutch command is modified based on the transmitted torque values. | 03-11-2010 |
20100258080 | VARIABLE EXHAUST BRAKE CONTROL VIA TURBINE VANE POSITIONING - A control system comprising a brake torque determination module that determines a desired brake torque and a vane position determination module that determines a vane position based on an engine speed and the desired brake torque, and that adjusts the vane position to a position between an open position and a closed position. A method comprising determining a desired brake torque, determining a vane position based on an engine speed and the desired brake torque, and adjusting the vane position to a position between an open position and a closed position. | 10-14-2010 |
20120031723 | SYSTEM AND METHOD FOR CONTROLLING ENGAGEMENT OF A LOCKUP CLUTCH IN A TORQUE CONVERTER - A dynamic model is stored in memory that defines torque transmitted by the lockup clutch as a function of a plurality of torque converter operating parameters. A lockup clutch command is asserted to control engagement the lockup clutch, and thereafter a number of the plurality of torque converter operating parameters are monitored. A profile is selected of one of the plurality of torque converter operating parameters, and the profile is configured to result in an intersection of rotational speeds of the pump and the turbine over time when inserted into the model along with the monitored values of the number of torque converter operating parameters. The model is continually solved over time using the selected profile and the monitored operating parameters to produce transmitted torque values, and the lockup clutch command is modified based on the transmitted torque values. | 02-09-2012 |
20120101700 | SYSTEM AND METHOD FOR CONTROLLING A TRANSMISSION TO IMPROVE EXHAUST BRAKING - A system for controlling a transmission of a vehicle powered by an engine includes a torque determination module and a shift determination module. The torque determination module determines a desired exhaust brake torque for the engine based on an actual speed of the vehicle and a desired speed of the vehicle. The shift determination module determines whether to shift between gear ratios of the transmission based on the desired exhaust brake torque and an exhaust brake torque capacity of the engine. | 04-26-2012 |