Abstract: A vehicle includes an internal combustion engine, an electric machine, and a controller. The electric machine is rotatably coupled to the engine and is configured to deliver electrical power to electrical accessories. The controller is programmed to, in response to a control signal loss between the electric machine and the controller, limit torque output of electric machine to less than a torque threshold that corresponds to the power threshold. The controller is further programmed to, in response an accessory power demand being greater than the power threshold, control the engine to power the electric machine to increase the torque output of electric machine to greater than the torque threshold to meet the accessory power demand.

Abstract: Methods and systems for operating an engine with an electrically heated catalyst and an electrically driven compressor are described. In one example, the electrically driven compressor and the electrically heated catalyst are activated before an engine start so that vehicle emissions may be reduced more efficiently at engine starting and thereafter.

Abstract: A method of controlling the engine of a vehicle having a stop-in-gear (SIG) stop-start system includes: a control module determining that a brake is being applied, based on an output from a brake sensor, and that a transmission is in an in-gear position, based on an output from a transmission sensor; and, while the brake is applied and the transmission is in an in-gear position, the control module causing the engine to start in response to detecting movement of a clutch pedal towards a released position based on an output from a clutch pedal sensor.

Abstract: Methods and systems are provided for an engine. In one example, a method of operating an engine of a vehicle, the vehicle comprising a brake pedal, a clutch pedal and a transmission having a neutral position and at least one in-gear position, comprises starting the engine if either the brake pedal of the vehicle is released or the transmission has been in neutral for a predetermined period of time, and the clutch pedal of the vehicle is depressed concurrently with the transmission being moved out of the neutral position into an in-gear position.

Abstract: A method of controlling the engine of a vehicle having a stop-in-gear (SIG) stop-start system comprises: a control module determining that a brake is being applied, based on an output from a brake sensor, and that a transmission is in an in-gear position, based on an output from a transmission sensor; and, while the brake is applied and the transmission is in an in-gear position, the control module causing the engine to start in response to detecting movement of a clutch pedal towards a released position based on an output from a clutch pedal sensor.

Abstract: Methods and systems are provided for dealing with a change of mind event during an automatic shut-down of an engine in which the speed at which a starter motor used to restart the engine is disengaged is based upon the comparison of current engine speed (N) with a cranking speed limit (SLIM). In one example, during an engine restart while the engine is spinning down, the starter motor may crank the engine to a threshold cranking engine speed adjusted based on a position of the gear.

Abstract: A vehicle having a manual transmission, adaptive cruise control, and an electric motor/generator includes electric creep and electric crawl modes that use the electric motor/generator to propel the vehicle when in traffic. Creep mode may be enabled and the engine stopped automatically when the transmission is in neutral and the vehicle is stationary. Crawl mode may be activated when the creep mode and the adaptive cruise control are enabled to use the electric motor/generator and adaptive cruise control to maintain a target distance to a forward vehicle. The creep mode may be canceled responsive to brake pedal activation. The creep mode and crawl mode may be canceled and the engine started responsive to clutch pedal or accelerator pedal activation. The creep mode and crawl mode may be deactivated responsive to battery charge level being below a threshold.

Abstract: A vehicle and associated method of operating a vehicle having an engine, a user interface configured to select a start-stop mode, and a controller communicating with the engine and the user interface automatically shutdown and restart the engine, and inhibit the automatic engine shutdown or restart responsive to any of a first group of inhibitors, or alternatively, any of the first group and a second group of inhibitors depending on the start-stop mode selected via the user interface.

Abstract: Methods and systems are provided for an engine. In one example, a method comprises stopping an engine via a soft-stop method in response to a likelihood of condensate forming being less than or equal to a threshold likelihood. The method further comprises stopping the engine via an exhaust gas evacuation method in response to the likelihood of condensate forming being greater than the threshold likelihood.

Abstract: Systems and methods for operating an engine of a vehicle that may be automatically stopped and started are disclosed. In one example, a speed at which a vehicle system induced automatic engine stop inhibit request is cleared may be adjusted to permit automatic engine stopping during a wide variety of driving conditions so that fuel may be conserved and the possibility of disturbing vehicle occupants may be reduced.

Abstract: Systems and methods for operating an engine of a vehicle that may be automatically stopped and started are disclosed. In one example, a speed at which a vehicle system induced automatic engine stop inhibit request is cleared may be adjusted to permit automatic engine stopping during a wide variety of driving conditions so that fuel may be conserved and the possibility of disturbing vehicle occupants may be reduced.

Abstract: A system for providing electric creep in a manual transmission vehicle having an accelerator pedal, a brake pedal, and an engine uses an electric motor configured to provide creep torque to a transmission output shaft when the manual transmission is in neutral, the electric creep mode is activated and the engine is auto-stopped. The system may provide forward or reverse creep torque. The system may cancel the electric creep in response to a vehicle door opening, a driver unbuckling a seatbelt, or depressing the accelerator pedal or the clutch pedal, or shifting the manual transmission out of neutral.

Abstract: Systems and methods are provided for a vehicle including a start-stop system configured to shut down and restart an engine of the vehicle automatically based on a brake value of a brake system. In one example, the method may include determining a first threshold brake value as a first function of a gradient of a surface on which the vehicle is positioned, determining a second threshold brake value as a second function of the gradient, wherein a difference between the first and second threshold brake values varies as a function of the gradient, shut down the engine when the brake value exceeds the first threshold brake value, and restart the engine when the brake value drops below the second threshold brake value. In this way, an incidence of inadvertent engine shut downs and restarts when the vehicle is stopped on an incline may be decreased.

Abstract: A vehicle and method of controlling a vehicle having an engine and braking system having an associated braking pressure include stopping the engine responsive to the brake pressure being above a first threshold, restarting the engine responsive to the brake pressure falling below a second threshold, reducing the second threshold for a predetermined time after the vehicle speed falls below a speed threshold, and resetting the second threshold after the predetermined time. The predetermined time may be modified based on input from a user interface or a user-selected vehicle operating mode.

Abstract: Methods and systems are provided for dealing with a change of mind event during an automatic shut-down of an engine in which the speed at which a starter motor used to restart the engine is disengaged is based upon the comparison of current engine speed (N) with a cranking speed limit (SLIM). In one example, during an engine restart while the engine is spinning down, the starter motor may crank the engine to a threshold cranking engine speed adjusted based on a position of the gear.

Abstract: Systems and methods are provided for a vehicle including a start-stop system configured to shut down and restart an engine of the vehicle automatically based on a brake value of a brake system. In one example, the method may include determining a first threshold brake value as a first function of a gradient of a surface on which the vehicle is positioned, determining a second threshold brake value as a second function of the gradient, wherein a difference between the first and second threshold brake values varies as a function of the gradient, shut down the engine when the brake value exceeds the first threshold brake value, and restart the engine when the brake value drops below the second threshold brake value. In this way, an incidence of inadvertent engine shut downs and restarts when the vehicle is stopped on an incline may be decreased.

Abstract: A vehicle and associated method of operating a vehicle having an engine, a user interface configured to select a start-stop mode, and a controller communicating with the engine and the user interface automatically shutdown and restart the engine, and inhibit the automatic engine shutdown or restart responsive to any of a first group of inhibitors, or alternatively, any of the first group and a second group of inhibitors depending on the start-stop mode selected via the user interface.

Abstract: A vehicle start-stop system includes an engine and a controller. The controller is programmed to operate the system in a first mode when a first input is selected, and in a second mode when a second input is selected. The controller is further programmed to inhibit engine stop in response to being in the first mode and an evaporator temperature having a first value, and stop the engine in response to being in the second mode and the evaporator temperature having the first value.

Abstract: A vehicle and method of controlling a vehicle having an engine and braking system having an associated braking pressure include stopping the engine responsive to the brake pressure being above a first threshold, restarting the engine responsive to the brake pressure falling below a second threshold, reducing the second threshold for a predetermined time after the vehicle speed falls below a speed threshold, and resetting the second threshold after the predetermined time. The predetermined time may be modified based on input from a user interface or a user-selected vehicle operating mode.

Abstract: A vehicle having a manual transmission, adaptive cruise control, and an electric motor/generator includes electric creep and electric crawl modes that use the electric motor/generator to propel the vehicle when in traffic. Creep mode may be enabled and the engine stopped automatically when the transmission is in neutral and the vehicle is stationary. Crawl mode may be activated when the creep mode and the adaptive cruise control are enabled to use the electric motor/generator and adaptive cruise control to maintain a target distance to a forward vehicle. The creep mode may be canceled responsive to brake pedal activation. The creep mode and crawl mode may be canceled and the engine started responsive to clutch pedal or accelerator pedal activation. The creep mode and crawl mode may be deactivated responsive to battery charge level being below a threshold.