Abstract: An injector control system and method for an engine includes a distribution module that calculates a difference between a first average engine speed and a second average engine speed of an engine and a fuel offset module that offsets a learned fuel amount of a first fuel injector of a plurality of fuel injectors based on the difference. The learned fuel amount corresponds to an engine fueling range.

Abstract: A method of controlling a clutch-to-clutch transmission. The method includes detecting transmission slip speed that exceeds a predetermined amount for a predetermined time period. Based on the detecting, a shift of a gear ratio of the transmission is forced. When this method is implemented in a vehicle, loss of driver control of the vehicle can be prevented in the event of a non-commanded neutral condition in the transmission.

Abstract: An engine control system comprises a coasting identification module, a throttle adjustment module, and a fuel adjustment module. The coasting identification module selectively identifies a coasting event. The throttle adjustment module increases an opening of a throttle valve during the coasting event. The fuel adjustment module decreases fuel provided to an engine during the coasting event.

Abstract: A method of regulating operation of an automatic transmission includes identifying a tie-up condition of the automatic transmission, adjusting a pressure of a transmission element in response to the tie-up condition and determining whether a first gear ratio of the automatic transmission holds. The pressure is set to zero if the gear ratio does not hold and a faulty transmission element is identified as one associated with a second gear ratio that is lower than said first gear ratio.

Abstract: A vehicle including a transmission having a plurality of clutches for providing a plurality of speed ratios. A control module of the vehicle detects a possible tie-up of at least two of the clutches. Based on the detecting, the control module releases one of the possibly tied-up clutches. After the release, the control module determines whether a tie-up condition occurred. Based on the determining, the control module reapplies pressure to the released clutch. Loss of driver control of the vehicle thus can be prevented in the event of clutch tie-up.

Abstract: An injector control system and method for an engine includes a distribution module that calculates a difference between a first average engine speed and a second average engine speed of an engine and a fuel offset module that offsets a learned fuel amount of a first fuel injector of a plurality of fuel injectors based on the difference. The learned fuel amount corresponds to an engine fueling range.

Abstract: A control system is provided. The control system includes a timer module that receives a first torque converter clutch (TCC) apply request and estimates at least one of a message latency time and a hydraulic latency time. A control module receives a subsequent TCC apply request and generates a torque request for an engine based on the at least one of the hydraulic latency time and the torque message latency time.

Abstract: A method for detecting a clutch fault of an automatic transmission includes determining a current clutch energy density of a clutch during a range shift and comparing the current clutch energy density to a first energy density threshold. A diagnostic alert is activated if the current clutch energy density exceeds the first energy density threshold.

Abstract: A method of regulating operation of an automatic transmission includes identifying a tie-up condition of the automatic transmission, adjusting a pressure of a transmission element in response to the tie-up condition and determining whether a first gear ratio of the automatic transmission holds. The pressure is set to zero if the gear ratio does not hold and a faulty transmission element is identified as one associated with a second gear ratio that is lower than said first gear ratio.

Abstract: A recovery control system and method for automatic transmissions includes a diagnostic module that determines a fault condition of a variable bleed solenoid (VBS) when the automatic transmission fails to establish a desired drive ratio. A recovery module initiates a recovery cycle of the VBS based on the fault condition. The fault condition includes one of a clutch stuck-on condition and a clutch stuck-off condition. A clutch controlled by the VBS fails to disengage during the clutch stuck-on condition, and the clutch fails to engage during the clutch stuck-on condition.

Abstract: A diagnostic system for a vehicle speed sensor is provided. The system includes: an upshift module that selecively Initiates an upshift of a transmission based on a vehicle speed sensor (VSS) signal; a speed drop detection module that monitors at least one of engine speed and input speed for a reduction in speed due to said upshift; and a torque request module that monitors engine torque and selectively diagnoses a VSS malfunction based on said speed reduction and said engine torque.

Abstract: A method of managing slip in a transmission that is driven by a prime mover includes determining whether a slip condition of the transmission is present based on a slip value and reducing a torque output of the prime mover based on a torque reduction value when the slip condition is present. The method further includes storing the torque reduction value in an array if the slip condition is resolved as a result of the step of reducing and identifying a faulty component within the transmission based on the array.

Abstract: A method of controlling a clutch-to-clutch transmission. The method includes detecting transmission slip speed that exceeds a predetermined amount for a predetermined time period. Based on the detecting, a shift of a gear ratio of the transmission is forced. When this method is implemented in a vehicle, loss of driver control of the vehicle can be prevented in the event of a non-commanded neutral condition in the transmission.

Abstract: A vehicle including a transmission having a plurality of clutches for providing a plurality of speed ratios. A control module of the vehicle detects a possible tie-up of at least two of the clutches. Based on the detecting, the control module releases one of the possibly tied-up clutches. After the release, the control module determines whether a tie-up condition occurred. Based on the determining, the control module reapplies pressure to the released clutch. Loss of driver control of the vehicle thus can be prevented in the event of clutch tie-up.