| Patent application number | Description | Published |
|---|
| 20090082150 | ELECTRO-MECHANICAL TRANSMISSION CONTROL SYSTEM - A system for robust fault detection in an electrically variable, hydraulically controlled transmission includes independently monitoring hydraulic pressure within a hydraulic control circuit and electric machine rotation for detecting clutch state faults. | 03-26-2009 |
| 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 |
| 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 |
| 20090111640 | METHOD AND APPARATUS FOR MONITORING REGENERATIVE OPERATION IN A HYBRID POWERTRAIN SYSTEM - A hybrid powertrain system includes an engine and a torque actuator coupled to a driveline to transfer tractive power to a wheel including a friction brake. A method includes monitoring an operator braking request and determining a request for regenerative braking torque. Operation of the torque actuator to react tractive power is inhibited when a fault is detected in the monitored request for regenerative braking torque and achieved regenerative braking torque. | 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 |
| 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 |
| 20090112412 | METHOD AND APPARATUS TO MONITOR OUTPUT OF AN ELECTRO-MECHANICAL TRANSMISSION - Controlling a hybrid powertrain includes monitoring an operator torque request, determining maximum and minimum allowable transmission output torques based upon the operator torque request, determining a commanded transmission output torque, and comparing the commanded transmission output torque and each of the maximum and minimum allowable transmission output torques. | 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 |
| 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 |
| 20090118881 | DETECTING PROGRAM FLOW FAULT IN TORQUE SECURITY SOFTWARE FOR HYBRID VEHICLE ELECTRIC DRIVE SYSTEM - A diagnostic system for a hybrid vehicle comprises a processor module and a motor control module. The processor module outputs a seed value. The motor control module controls torque output by an electric motor of the hybrid vehicle, receives the seed value, generates a final key value based on the seed value, and outputs the final key value to the processor module. | 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 |
| 20090125171 | PROCESSOR SECURITY DIAGNOSTICS FOR HYBRID VEHICLE ELECTRIC MOTOR CONTROL SYSTEM - A diagnostic system for a hybrid vehicle comprises a processor module and a motor control module. The processor module outputs a first seed value. The motor control module controls torque output by an electric motor of the hybrid vehicle and outputs a key value based on the first seed value. The processor module outputs a second seed value after receiving the key value, and the motor control module selectively diagnoses a fault in the processor module based on a comparison of the second seed value with the first seed value. | 05-14-2009 |
| 20110068727 | METHOD AND SYSTEM FOR MONITORING POWER ELECTRONICS CONTROLLERS IN AUTOMOTIVE ELECTRICAL SYSTEMS - Methods and systems are provided for monitoring an automotive electrical system including an inverter having at least one switch. First and second voltage commands corresponding to respective first and second components of a commanded voltage vector on a synchronous frame of reference coordinate system are received. A plurality of duty cycles for operating the at least one switch are calculated based on the first and second voltage commands. First and second actual voltages are calculated based on the plurality of duty cycles. The first and second actual voltages correspond to respective first and second components of an actual voltage vector on the synchronous frame of reference coordinate system. An indication of a fault is generated based on the difference between the first components of the commanded voltage vector and the actual voltage vector and the difference between the second components of the commanded voltage vector and the actual voltage vector. | 03-24-2011 |
| 20110070991 | ELECTRO-MECHANICAL TRANSMISSION CONTROL SYSTEM - A system for robust fault detection in an electrically variable, hydraulically controlled transmission includes independently monitoring hydraulic pressure within a hydraulic control circuit and electric machine rotation for detecting clutch state faults. | 03-24-2011 |
