Abstract: A computer-implemented method includes receiving a restore command to restore a vehicle computing system (VCS) system state. The method further includes restoring a base system state to a known, functional state and obtaining a list of applications previously installed on the VCS. The method also includes for each application previously installed on the VCS, finding a version of the application compatible with the restored base system state. Also, the method includes installing the version of each application compatible with the restored base system state.

Abstract: A computer-implemented method includes receiving a restore command to restore a vehicle computing system (VCS) system state. The method further includes restoring a base system state to a known, functional state and obtaining a list of applications previously installed on the VCS. The method also includes for each application previously installed on the VCS, finding a version of the application compatible with the restored base system state. Also, the method includes installing the version of each application compatible with the restored base system state.

Abstract: A computer-implemented method includes receiving a restore command to restore a vehicle computing system (VCS) system state. The method further includes restoring a base system state to a known, functional state and obtaining a list of applications previously installed on the VCS. The method also includes for each application previously installed on the VCS, finding a version of the application compatible with the restored base system state. Also, the method includes installing the version of each application compatible with the restored base system state.

Abstract: A computer-implemented method includes receiving a restore command to restore a vehicle computing system (VCS) system state. The method further includes restoring a base system state to a known, functional state and obtaining a list of applications previously installed on the VCS. The method also includes for each application previously installed on the VCS, finding a version of the application compatible with the restored base system state. Also, the method includes installing the version of each application compatible with the restored base system state.

Abstract: A system for determining a temperature of exhaust gases from an engine is provided. The system includes an exhaust gas sensor having an electric heating coil. The sensor communicates with exhaust gases from the engine. The system further includes an electrical circuit for generating a signal indicative of the resistance of the heating coil when the coil is not energized. Finally, the system includes a controller receiving the signal and calculating the temperature of the exhaust gases based on the signal.

Abstract: A system for determining a temperature of exhaust gases from an engine is provided. The system includes an exhaust gas sensor having an electric heating coil. The sensor communicates with exhaust gases from the engine. The system further includes an electrical circuit for generating a signal indicative of the resistance of the heating coil when the coil is not energized. Finally, the system includes a controller receiving the signal and calculating the temperature of the exhaust gases based on the signal.

Abstract: Method and system are provided for monitoring performance of a catalytic converter coupled to an exhaust of an internal combustion engine supplied with fuel from a fuel tank where the fuel can include a first fuel and second fuel in concentrations that vary from one refueling to the next. A ratio indicative of catalytic converter exhaust gas conversion efficiency is determined from signals provided by an exhaust gas sensor disposed upstream and an exhaust gas sensor disposed downstream relative to the catalytic converter, and a ratio threshold value indicative of a malfunctioning catalytic converter is adjusted in dependence on the concentration of one of the first fuel and second fuel in the fuel in the fuel tank.

Abstract: A method and system for estimating the midbed temperature of a catalytic converter in an exhaust system of an internal combustion engine. A rate of change in the speed of the engine is sensed and an estimated number of misfires occurring in the engine over a predetermined number of cylinder filling events is determined based on the sensed rate of change in engine speed. An instantaneous temperature of exhaust gas at the exhaust flange is determined based on the estimated rate of misfires. An instantaneous temperature at the midbed point of the catalytic converter is then determined based on the instantaneous temperature of exhaust gas at the exhaust flange. The instantaneous temperature at the midbed point is compared to a predetermined temperature threshold and the estimate rate of misfires is compared to a predetermined misfire rate threshold.

Abstract: An engine control computer estimates NO.sub.x trap temperature based on an estimated midbed temperature of a three-way catalytic converter located upstream from the trap and the effect on NO.sub.x trap temperature of introducing air into the exhaust upstream of the trap during purging of the trap.

Abstract: A method and apparatus for inferring and controlling the temperature of a NO.sub.x trap located downstream from a three-way catalyst that employs a temperature sensor to correct a temperature estimation model under relatively steady-state conditions to provide a more accurate estimate of NO.sub.x trap temperature and three-way catalyst temperature. In a second embodiment, the three-way catalyst also includes a temperature sensor for improving the instantaneous catalyst temperature estimation.

Abstract: An air/fuel control system (10) and method for an engine (28) coupled to a catalytic converter (50) includes monitoring of the converter (50). Engine air/fuel ratio is controlled (104-178) in response to a pair of two-state signals generated by comparing the outputs of respective upstream (44, 55) and downstream (52) exhaust gas oxygen sensors to a reference voltage. The transitions in the downstream sensor are indicated when a difference in its output amplitude changes signs and a difference between stored peak values occurring during two successive changes in the sign exceeds a predetermined value (200-350). Converter efficiency is indicated from a ratio of transitions in the downstream sensor transitions to transitions in the upstream sensor output which are generated in a similar manner (690-770).