A torque-speed curve or data of load that is used as a standard to determine an external condition in which an electric vehicle is operating such as incline or no incline, head wind or no headwind, high temperature or low temperature. The system compares samples of actual torque-speed of load data to the standard. Based on the comparison, the system determines the external condition (going up a hill, traveling into a headwind, operating at high temperature) or an abnormal operation of the vehicle powertrain, for example, low tire pressure, elevated friction, wheels out of alignment. Based on the determination, the system takes an action to govern a maximum torque output of the motor to control temperature of the vehicle battery; to raise a wind deflector; to govern maximum speed of the vehicle to reduce danger resulting from low tire pressure, elevated powertrain friction or out of alignment wheels; or to initiate an indication of abnormal conditions.

A method of controlling an electric oil pump configured for a vehicle, may include a step of determining whether a vehicle has entered a sloped road, a step of determining whether a drive motor of the vehicle is in one or more overheatable conditions when it is determined that the vehicle has entered a sloped road, a step of determining whether the overheatable condition is maintained over a preset reference time when it is determined that the vehicle is in the over-heatable condition; and a step of supplying a pulse to an RPM input for the electric oil pump when it is determined that the duration of the over-heatable condition exceeds the preset reference time.

A system and method for controlling switching of an electric vehicle to four-wheel drive are provided. The system includes a first motor connected to main drive wheels and configured to output a first torque, a second motor connected to subsidiary drive wheels and configured to output a second torque, a disconnector mounted on an axle shaft for the subsidiary drive wheels, a driver requested torque detector configured to detect a driver requested torque, and a controller configured to release a set output limit of the first motor for a designated time and simultaneously release a set output limit of the second motor when the driver requested torque is greater than or equal to a reference requested torque, and control the first motor to output a maximum torque exceeding the set output limit to the main drive wheels until the disconnector is engaged.

A torque security system for a vehicle is provided. The system receives a signal from a sensor coupled to a motor shaft of an electric motor and determines an acceleration of the electric motor, based on the signal from the sensor that indicates an amount of rotation of the motor shaft. The system determines an internal torque between the motor shaft and an input gear coupled to the motor shaft, based on the acceleration of the electric motor and an inertia of the electric motor and a gearbox. The powertrain of the vehicle comprises the gearbox and the electric motor, and the input gear couples the electric motor to the gearbox. The system determines whether the internal torque exceeds a threshold torque, and in response to determining that the internal torque exceeds the threshold torque, the system reduces power output to the electric motor. The system also diagnoses the health of the gearbox.

The invention regards a controller for controlling an output power of an electric vehicle, such vehicle and a respective method. The controller is configured to operate in a drive mode controlling electrical energy to a motor generating torque for driving the vehicle based on a throttle input signal. The controller is further configured to receive, in addition to the throttle input signal, a further user controllable signal and to switch the controller in response to such user controllable signal to a maximum power mode for a time interval, wherein in the maximum power mode the maximum electrical energy that can be delivered to the motor is increased compared to the drive mode.

A controlling apparatus 1 according to an embodiment is a controlling apparatus of a hybrid vehicle 30 including a motor generator 3 that is mechanically connected to an internal combustion engine 2 and that can generate power in response to rotation of the internal combustion engine 2 and provide torque to the internal combustion engine 2, the controlling apparatus 1 including a rotation information acquiring unit 11 that acquires rotation information of the motor generator 3 with a higher resolution than rotation information of the internal combustion engine 2 and a power generation determining unit 12 that makes a determination regarding the power generation by the motor generator 3 based on the rotation information of the motor generator 3.

A torque-speed curve or data of load that is used as a standard to determine an external condition in which an electric vehicle is operating such as incline or no incline, head wind or no headwind, high temperature or low temperature. The system compares samples of actual torque-speed of load data to the standard. Based on the comparison, the system determines the external condition (going up a hill, traveling into a headwind, operating at high temperature) or an abnormal operation of the vehicle powertrain, for example, low tire pressure, elevated friction, wheels out of alignment. Based on the determination, the system takes an action to govern a maximum torque output of the motor to control temperature of the vehicle battery; to raise a wind deflector; to govern maximum speed of the vehicle to reduce danger resulting from low tire pressure, elevated powertrain friction or out of alignment wheels; or to initiate an indication of abnormal conditions.

A controlling apparatus 1 according to an embodiment is a controlling apparatus of a hybrid vehicle 30 including a motor generator 3 that is mechanically connected to an internal combustion engine 2 and that can generate power in response to rotation of the internal combustion engine 2 and provide torque to the internal combustion engine 2, the controlling apparatus 1 including a rotation information acquiring unit 11 that acquires rotation information of the motor generator 3 with a higher resolution than rotation information of the internal combustion engine 2 and a power generation determining unit 12 that makes a determination regarding the power generation by the motor generator 3 based on the rotation information of the motor generator 3.

A drive axle system and a method of control. A control system determines a torque command based on an inverter temperature, a stator temperature of a stator of an electric motor, and a rotor temperature of a rotor of the electric motor. The electric motor is operated to provide torque based on the torque command.

A method for protecting a motor from overloading includes: acquiring a present effective value of a phase current of a motor; performing time integration on the present effective value of the phase current, to obtain a first integral value; obtaining a first threshold; performing overload detection according to the first threshold and the first integral value; determining a target limiting current for operation of the motor if an overload occurs; and controlling the operation of the motor based on the target limiting current.