Auto cruise downhill control method for vehicle

A non-transitory computer readable medium containing program instructions executed by a processor or controller, the computer readable medium comprising:

• program instructions that sense that the vehicle is operating downhill;
• program instructions that transmit a target deceleration value to an electronic stability control (ESC) unit, in response to sensing that the vehicle is operating downhill and when a brake force is required while the vehicle is being driven at an auto cruise setting speed;
• program instructions that perform ADC to automatically brake the vehicle and to automatically adjust a speed of the vehicle to the auto cruise setting speed;
• program instructions that calculate current deceleration based on a sensing value of a speed sensor disposed on a wheel;
• program instructions that drive a motor included in the ESC unit by pumping and simultaneously operating a solenoid valve to be open to distribute a braking solution in a reservoir to each of one or more hydraulic brakes by pumping driving of the motor;
• program instructions that distribute hydraulic pressures to the one or more hydraulic brakes to achieve a target deceleration;
• and
• program instructions that perform braking activation to the target deceleration using the hydraulic brakes to adjust the speed of the vehicle to the auto cruise setting speed.

A auto cruise downhill control system, the system comprising:

• a sensor configured to sense that the vehicle is operating downhill;
• an engine control unit (ECU) configured to transmit a target deceleration value in response to sensing that the vehicle is operating downhill and when a brake force is required while the vehicle is being driven at an auto cruise setting speed;
• and
• an electronic stability control (ESC) unit configured to receive the transmission from the ECU and perform an auto cruise downhill control to automatically brake the vehicle and to automatically adjust a speed of the vehicle to the auto cruise setting speed,
• wherein the ESC unit is configured to calculate current deceleration based on a sensing value of a speed sensor disposed on a wheel, drive a motor included in the ESC unit by pumping and simultaneously operating a solenoid valve to be open to distribute a braking solution in a reservoir to each of one or more hydraulic brakes by pumping driving of the motor, distribute hydraulic pressures to the one or more hydraulic brakes to achieve a target deceleration, and perform braking activation to the target deceleration using the hydraulic brakes to adjust the speed of the vehicle to the auto cruise setting speed.