Embodiments of the invention provide a controller for a hybrid electric vehicle (HEV) having an engine and an electric machine, the controller being configured upon start-up to control an electric machine to provide torque to drive a vehicle with an engine off if a state of charge (SoC) of an energy storage device is above an EV-start SoC threshold and to start an engine if a SoC of an energy storage device is below the EV-start SoC threshold, wherein the EV-start SoC threshold is determined to be one selected from amongst a value sufficient to allow a vehicle to travel a prescribed distance before a SoC falls below a SoC minimum level at which an engine is started and a value sufficient to allow a vehicle to operate for a prescribed time period before a SoC falls below the SoC minimum level.

An electrical system includes an engine, a motor-generator and a starter mechanism, and engine systems also include the engine. The electrical system includes a first energy storage device having a first voltage level and a second energy storage device having a second voltage level less than the first voltage level. The electrical system further includes a controller configured to control the motor-generator, the starter mechanism and first and second switching devices. Current from at least one of the first and second energy storage devices is delivered to the motor-generator when at least one of the first switching device is in a first closed state and the second switching device is in a second closed state such that the motor-generator transfers torque to the starter mechanism and the starter mechanism uses the torque to start the engine.

A method for controlling an electric two-wheel vehicle that enables a rider to start driving without a sense of discomfort when operating a clutch to perform a start operation. The control method is a method for controlling an electric two-wheel vehicle, the electric two-wheel vehicle including a motor, a clutch, and a stepped transmission, the method including: a disengagement detecting step of detecting a transition from a state in which the clutch is disengaged to a state in which the clutch is engaged; an accelerator operation detecting step of detecting an amount of accelerator operation performed by a rider after the engagement of the clutch; a target motor rotation speed setting step of setting a target motor rotation speed based on the accelerator operation amount; and a motor rotation speed controlling step of controlling a rotation speed of the motor based on the target motor rotation speed.

A slip control method and apparatus, an electronic device and a storage medium are provided. The slip control method includes: acquiring a wheel speed of each wheel of a vehicle in response to a working condition that the vehicle is in a launch starting execution stage; determining a slip working condition of the vehicle according to the wheel speed of the wheel; acquiring one or more motor operating parameters of the vehicle, and determining a slip output torque of the vehicle according to the slip working condition of the vehicle and the motor operating parameters; and adjusting an actual output torque of the vehicle according to the slip output torque, and controlling the motor to operate at the adjusted actual output torque.

Please substitute the new Abstract submitted herewith for the original Abstract: A method for controlling an electric motor of a battery-operated electric vehicle (BEV) includes receiving a signal for activating a drive slip control function for a braked start at full load of the BEV, supplying the electric motor with a predefined basic application of current while the BEV is in a braked state, and releasing a vibration mode by exciting the electric motor corresponding to a predetermined excitation scheme in addition to the predefined basic application of current. A battery-operated electric vehicle and a control device for a battery-operated electric vehicle are also disclosed.

A method for increasing the power during an acceleration process of an electrically operated motor vehicle with at least one electrical machine includes detecting a storage request by at least one control unit and initiating an increase in the rotation speed of a rotor of the electrical machine of the motor by the control unit before an acceleration request, so that kinetic energy is stored in the rotor of the electrical machine. The acceleration request is detected by the control unit and the energy stored in the rotor of the electrical machine is released during the acceleration process.

An electric vehicle includes an electric traction motor configured to selectively provide torque to vehicle wheels, a shifter configured to shift the electric vehicle, and a motor control system for electric traction motor quadrant protection in steady and transient shifter positions. The motor control system is in signal communication with the electric traction motor and the shifter, and includes a controller having one or more processors. The controller is programmed to monitor the shifter, detect a garage shift, and upon detecting the garage shift, filter the electric traction motor torque to zero to smoothly transition the electric traction motor during the garage shift and allow the garage shift to complete before an electric motor quadrant protection is initiated.

A vehicle, e.g., a two-wheeled electric vehicle, is operable in a low-speed mode, in which the vehicle can be propelled selectively in the forward or reverse direction, at a speed limited to approximately an average person's walking speed, e.g., approximately 3 mph. The amount of torque driving the vehicle is controlled so that higher torque is available to propel the vehicle at lower speeds and lower torque is available to propel the vehicle at higher speeds. The maximum torque of the vehicle's electric motor is available to propel the vehicle at a standstill.

An electrical energy recovery, storage, and distribution system that may be used in a vehicle. The system may include a supercapacitor configured to quickly store large amounts of energy. The system may also include multiple circuits operating at different voltage levels, such that an output voltage from the supercapacitor is useful over a larger voltage range and the system is more energy efficient.

A method of operating a power inverter for an electric machine includes selecting an inverter switching technique; determining a frequency range for inverter switching; determining a direct current (DC) voltage range for inverter switching; determining an optimal switching map including an inverter switching technique and frequency selection for each value of torque-speed on a torque-speed curve; and controlling switches included in the power inverter using the optimal switching map.