System and method for controlling uphill driving of an electric vehicle
AssigneeHyundai Motor Company
InventorsSang Joon Kim, Sungdeok Kim
Life of this patent
Estimating the term…
Abstract
Disclosed is a system and method that control an electric vehicle to engage a brake and to output torque of a motor after completely stopping an electric vehicle on a slope by the brake and controlling the torque of the motor to be 0 when the torque of the motor is a positive value and the velocity of the motor is a negative value when the electric vehicle is rolling backwards down a hill during uphill driving, such that safety and reliability of the electric vehicle can be improved when the electric vehicle is driving uphill on a slope.
Claims16
A method for controlling uphill driving of an electric vehicle which includes a motor and a battery, comprising:
- (a) determining, by a vehicle control device, whether a torque of the motor has a positive value and a velocity of the motor is a negative value when the battery is in a charging power limit state;
- (b) controlling, by a motor control device, the torque of the motor to be 0 and engaging a brake when the torque of the motor positive, the velocity of the motor is negative and the battery is in a charging power limit state;
- and
- (c) releasing, by a brake control device, the brake and outputting the torque of the motor when the electric vehicle is stopped due to engagement of the brake.
A system for controlling uphill driving of an electric vehicle, comprising:
- a battery configured to provide power to the electric vehicle;
- a vehicle control device configured to detect whether the electric vehicle is rolling backwards down a hill during uphill driving and generate control commands for a motor and a brake;
- a motor control device configured to receive a first control command from the vehicle control device and control the motor based on the first control command;
- and
- a brake control device configured to receive a second control command from the vehicle control device and control the brake according to the second control command,
- wherein the vehicle control device controls a torque of the motor to be 0 and engages the brake when the battery is in a charging power limit state, the torque of the motor is a positive value, and a velocity of the motor is a negative value, and
- once the brake has stopped the vehicle, the vehicle control device releases the brake and outputs the torque of the motor.
A non-transitory computer readable medium containing program instructions executed by a control unit, the computer readable medium comprising:
- program instructions that determine whether a torque of the motor has a positive value and a velocity of the motor is a negative value when the battery is in a charging power limit state;
- program instructions that control the torque of the motor to be 0 and engage a brake when the torque of the motor positive, the velocity of the motor is negative and the battery is in a charging power limit state;
- and
- program instructions that release the brake and outputting the torque of the motor when the electric vehicle is stopped due to engagement of the brake.
Dependencies are inferred from the claim text.