Abstract: A method of operating an electric vehicle having multiple electric traction motors include receiving a signal indicative of a driver requested torque, and determining portions of the torque request to produce from each traction motor based on efficiency maps of the motors. The method may also include producing the determined portions of torque from each motor.

Abstract: The power train of an electric vehicle includes an electric motor and a gearbox coupling the electric motor to a drive wheel. A controller may be configured to initiate a gear shift in the gearbox, and activate one or both of (a) a torque jog in electric motor, or (b) a burst of a pressurized fluid in an actuator to assist with the gear shift.

Abstract: The vehicle includes a powertrain having an axle having a first drive wheel and a second drive wheel. A first gearbox may couple a first power source to the first drive wheel, and a second gearbox may independently couple a second power source to the second drive wheel. And, a controller may be configured to initiate a gear shift in the first gearbox and the second gearbox at different times.

Abstract: The vehicle includes a powertrain having an axle having a first drive wheel and a second drive wheel. A first gearbox may couple a first power source to the first drive wheel, and a second gearbox may independently couple a second power source to the second drive wheel. And, a controller may be configured to initiate a gear shift in the first gearbox and the second gearbox at different times.

Abstract: The vehicle includes a powertrain having an axle having a first drive wheel and a second drive wheel. A first gearbox may couple a first power source to the first drive wheel, and a second gearbox may independently couple a second power source to the second drive wheel. And, a controller may be configured to initiate a gear shift in the first gearbox and the second gearbox at different times.

Abstract: The power train of an electric vehicle includes an electric motor and a gearbox coupling the electric motor to a drive wheel. A controller may be configured to initiate a gear shift in the gearbox, and activate one or both of (a) a torque jog in electric motor, or (b) a burst of a pressurized fluid in an actuator to assist with the gear shift.

Abstract: The vehicle includes a powertrain having an axle having a first drive wheel and a second drive wheel. A first gearbox may couple a first power source to the first drive wheel, and a second gearbox may independently couple a second power source to the second drive wheel. And, a controller may be configured to initiate a gear shift in the first gearbox and the second gearbox at different times.

Abstract: A method of operating an electric vehicle having multiple electric traction motors include receiving a signal indicative of a driver requested torque, and determining portions of the torque request to produce from each traction motor based on efficiency maps of the motors. The method may also include producing the determined portions of torque from each motor.

Abstract: A heavy-duty electric vehicle having a pneumatic brake may include at least one electric motor configured to propel the vehicle, and a battery system configured to provide power to the at least one electric motor. The battery system may be configured to be recharged by regenerative braking of the vehicle. The vehicle may also include a braking system. The braking system may be configured to (a) apply substantially only regenerative braking to slow the vehicle during initial slowdown and (b) subsequently apply both regenerative braking and pneumatic braking after the initial slowdown.

Abstract: Methods, systems, and vehicles are provided that provide for thermal conditioning of a vehicle rechargeable energy storage system (RESS). A thermal conditioning system is coupled to the RESS, and is configured to thermally condition the RESS. A control system is coupled to the thermal conditioning system, and is configured to estimate a state of charge for the RESS and provide instructions for the thermal conditioning system to thermally conditioning the RESS based on the state of charge.

Abstract: Methods, systems, and vehicles provide for cooling of a vehicle rechargeable energy storage system (RESS). A control system is coupled to the RESS, and is configured to cool the RESS. The control system includes a passive cooling system for cooling the RESS, an active cooling system for cooling the RESS, and a controller. The controller is coupled to the passive cooling system and the active cooling system, and is configured to determine whether conditions are present for effective use of the passive cooling system, initiate cooling of the RESS using the passive cooling system if it is determined that the conditions are present for effective use of the passive cooling system, and initiate cooling of the RESS using the active cooling system if it is determined that the conditions are not present for effective use of the passive cooling system.

Abstract: Methods, systems, and vehicles are provided that provide for cooling of a vehicle rechargeable energy storage system (RESS). A cooling system is coupled to the RESS, and is configured to cool the RESS. A control system is coupled to the cooling system, and is configured to determine whether the RESS is charging, determine whether the vehicle is in a propulsion ready state, and initiate cooling of the RESS if the RESS is not charging and the vehicle is not in the propulsion ready state, provided further that one or more conditions are present that would promote faster than desired capacity loss for the RESS.

Abstract: An electric vehicle includes an electric motor configured to provide traction and a control system. The control system may be configured to receive a signal indicative of a requested torque and determine an acceleration limit based on the requested torque. The electric vehicle may also include an inverter operatively coupled to the control system and the electric motor. The inverter may be configured to control the electric motor based at least on (a) a signal indicative of the requested torque, and (b) a signal indicative of the acceleration limit.

Abstract: A method of operating a RESS thermal system in a vehicle having a coolant loop for directing a coolant through a RESS and a refrigerant loop configured to selectively cool the coolant flowing through a chiller in the coolant loop, including: determining a current target temperature range for the RESS based on a current vehicle operating mode and ambient temperature; determining a temperature of the RESS; determining if the temperature of the RESS needs to increase or decrease to be within the current target temperature range; if the determination is made that the temperature of the RESS needs to increase, determining if an active heating or a passive heating of the coolant will be employed, the active heating using a greater amount of energy over a shorter time period than the passive heating; and activating the determined active heating or passive heating of the coolant.

Abstract: A method of controlling a transmission of a vehicle powered by an electric motor may include initiating a gear engagement in the transmission. The method may also include activating a torque jog in the electric motor to assist with the gear engagement. The torque jog may include a fluctuation in the torque output of the electric motor.

Abstract: Systems and methods for determining the target thermal conditioning value to control a rechargeable energy storage system. Target thermal conditioning values are determined using a required thermal power value and a heat generation value in order to appropriately condition the RESS for heating and cooling.

Abstract: A method for charging a thermal storage device of a thermal storage heat pump system in a vehicle is provided. The method includes comparing an actual temperature of the thermal storage device to a target temperature, and an actual charge time to an available charge time, where the comparing is performed by a controller. The target temperature may be based upon ambient air temperature and ambient air humidity. The actual charge time is the time it takes to charge the thermal storage device to the target temperature. The available charge time is the difference between the current time and an intended departure time. When the target temperature is greater than the actual temperature, and the available charge time is equal to or greater than the actual charge time, the controller may charge the thermal storage device until the actual temperature is equal to the target temperature.

Abstract: Methods, systems, and vehicles provide for cooling of a vehicle rechargeable energy storage system (RESS). A control system is coupled to the RESS, and is configured to cool the RESS. The control system includes a passive cooling system for cooling the RESS, an active cooling system for cooling the RESS, and a controller. The controller is coupled to the passive cooling system and the active cooling system, and is configured to determine whether conditions are present for effective use of the passive cooling system, initiate cooling of the RESS using the passive cooling system if it is determined that the conditions are present for effective use of the passive cooling system, and initiate cooling of the RESS using the active cooling system if it is determined that the conditions are not present for effective use of the passive cooling system.

Abstract: Methods, systems, and vehicles are provided that provide for cooling of a vehicle rechargeable energy storage system (RESS). A cooling system is coupled to the RESS, and is configured to cool the RESS. A control system is coupled to the cooling system, and is configured to determine whether the RESS is charging, determine whether the vehicle is in a propulsion ready state, and initiate cooling of the RESS if the RESS is not charging and the vehicle is not in the propulsion ready state, provided further that one or more conditions are present that would promote faster than desired capacity loss for the RESS.

Abstract: Methods, systems, and vehicles are provided that provide for thermal conditioning of a vehicle rechargeable energy storage system (RESS). A thermal conditioning system is configured to apply a plurality of thermal conditioning actions for the RESS. A control system is configured to determine a driving route for the vehicle for a drive cycle of the vehicle, select one of the plurality of thermal conditioning actions based at least in part on the driving route, and provide instructions for the thermal conditioning system to apply the selected one of the plurality of thermal conditioning actions for the RESS.