A system and method for controlling a hybrid vehicle having an engine, a traction motor, and an automatic step-ratio transmission having a plurality of selectable discrete gear ratios, a torque converter, and sharing a common cooling fluid or oil with the traction motor, include a controller configured to shift the automatic step-ratio transmission to neutral in response to vehicle speed being below a threshold with the engine idling while temperatures of at least two of: the traction battery, the electric machine, and the transmission are above associated thresholds to reduce heat generation by the torque converter due to oil shear with the torque converter stalled. The controller may shift the transmission to drive in response to release of a brake pedal. A neutral shift may also be performed in response to high-voltage accessory loads or on-board generator loads exceeding a threshold.

A vehicle controller controls a vehicle including an engine and an automatic transmission. The vehicle controller includes an electronic control unit. The electronic control unit estimates power generable by the engine based on a condition of the engine and a condition of the automatic transmission in a non-driving range, calculates a load on the automatic transmission in a driving range based on a condition of the automatic transmission in the driving range, determines whether a difference between the power and the load is equal to or smaller than a predetermined threshold by which an engine stall is identifiable, and limits a gear shift request from the non-driving range to the driving range when the difference is equal to or smaller than the predetermined threshold.

A vehicle controller controls a vehicle including an engine and an automatic transmission. The vehicle controller includes an electronic control unit. The electronic control unit estimates power generable by the engine based on a condition of the engine and a condition of the automatic transmission in a non-driving range, calculates a load on the automatic transmission in a driving range based on a condition of the automatic transmission in the driving range, determines whether a difference between the power and the load is equal to or smaller than a predetermined threshold by which an engine stall is identifiable, and limits a gear shift request from the non-driving range to the driving range when the difference is equal to or smaller than the predetermined threshold.

A method for shifting multi-speed transmissions of marine propulsion devices each having a power head and a shift schedule for shifting between first and second gears to transmit torque from the powerhead. The method includes configuring the transmissions of leader and follower marine propulsion devices to shift when shift schedules of the leader and of the follower indicate shift recommendations, respectively. The method further includes receiving a request to shift the transmission of the leader when the shift schedule of the leader indicates the shift recommendation. The method further includes determining whether conditions are met for the follower to follow the leader in shifting. The method further includes automatically requesting, when conditions are determined to be met for the follower to follow the leader, to shift the transmission of the follower so as to be coordinated with shifting the transmission of the leader.

A method for shifting multi-speed transmissions of marine propulsion devices each having a power head and a shift schedule for shifting between first and second gears to transmit torque from the powerhead. The method includes configuring the transmissions of leader and follower marine propulsion devices to shift when shift schedules of the leader and of the follower indicate shift recommendations, respectively. The method further includes receiving a request to shift the transmission of the leader when the shift schedule of the leader indicates the shift recommendation. The method further includes determining whether conditions are met for the follower to follow the leader in shifting. The method further includes automatically requesting, when conditions are determined to be met for the follower to follow the leader, to shift the transmission of the follower so as to be coordinated with shifting the transmission of the leader.

A method for shifting a marine propulsion device transmission between first and second gears transmitting torque from a powerhead with a redline RPM. The transmission has a transition time for completing a shift. The method includes measuring an RPM of the powerhead, comparing the RPM to a first threshold, and starting a timer when the RPM exceeds the first threshold. The method includes measuring the RPM of the powerhead after the first threshold is exceeded, comparing the RPM to a second threshold, stopping the timer when the RPM exceeds the second threshold, determining an elapsed time between starting and stopping the timer, and determining a shift RPM based on the determined elapsed time, the redline RPM, and the transition time of the transmission. The method includes controlling the transmission to shift when the RPM measured for the powerhead reaches the shift RPM such that shifting completes before the redline RPM.

A method for shifting a marine propulsion device transmission between first and second gears transmitting torque from a powerhead with a redline RPM. The transmission has a transition time for completing a shift. The method includes measuring an RPM of the powerhead, comparing the RPM to a first threshold, and starting a timer when the RPM exceeds the first threshold. The method includes measuring the RPM of the powerhead after the first threshold is exceeded, comparing the RPM to a second threshold, stopping the timer when the RPM exceeds the second threshold, determining an elapsed time between starting and stopping the timer, and determining a shift RPM based on the determined elapsed time, the redline RPM, and the transition time of the transmission. The method includes controlling the transmission to shift when the RPM measured for the powerhead reaches the shift RPM such that shifting completes before the redline RPM.

A method for shifting a multi-speed transmission of a marine propulsion device between a first gear and a second gear each configured to transmit torque from a powerhead to a transmission output shaft. The method includes determining an actual power level requested for operating the marine propulsion device and measuring a transmission output shaft speed in which the transmission output shaft is rotating. The method further includes comparing the actual power level to a shift threshold, the shift threshold corresponding to expected power levels for operating the marine propulsion device as a function of the transmission output shaft speed of the transmission output shaft. The method further includes controlling the multi-speed transmission to shift when the actual power is outside the shift threshold.

A method for downshifting a multi-speed transmission of a marine propulsion device to a first gear from a second gear. The method includes providing a shift schedule that indicates a shift recommendation for when to downshift from the second gear to the first gear. The method further includes configuring the transmission to downshift when the shift schedule indicates the shift recommendation, determining a requested speed of the marine propulsion device, measuring an actual speed of the marine propulsion device, calculating an error between the requested speed and the actual speed, comparing the error to an error threshold, and determining when the error exceeds the error threshold longer than a duration threshold. The method further includes controlling the transmission to downshift, despite the shift schedule indicating a non-shift recommendation, when the duration threshold is exceeded so as to reduce the error between the requested speed and the actual speed.

A vehicle includes an engine and a transmission having an input shaft operably coupled to the engine, an output shaft operably coupled to wheels of the vehicle, a primary pump, and a secondary pump. The primary and secondary pumps are each configured to supply pressurized fluid to a valve body of the transmission. A controller is programmed to, in response to a loss of pressure of the primary pump and a speed of the output shaft exceeding a first threshold, shift the transmission to a neutral state, energize the secondary pump once the transmission is in the neutral state, and command the engine to idle speed.