| 摘要 |
Disclosed herein is an auto cruise downhill control (ADC) method for a vehicle, whereby, when a speed of the vehicle exceeds an auto cruise setting speed, the speed of the vehicle is automatically adjusted to be the auto cruise setting speed by using an engine control unit (ECU) and an electronic stability control (ESC) unit. In other words, when a current vehicle speed exceeds a predetermined value compared to a driver's setting speed for auto cruise, automatic braking activation control is performed by the ESC unit to adjust the speed of the vehicle to be the auto cruise setting speed when the vehicle is operating on a steep decline. Additionally, when a driver makes a steep downward adjustment of the setting speed, automatic braking activation control is performed by the ESC unit to decrease the speed of the vehicle to a downwardly adjusted level at an accelerated rate. |
| 主权项 |
1. An auto cruise downhill control (ADC) method for a vehicle, the method comprising:
sensing, by a sensor in a vehicle dynamic system, that the vehicle is operating downhill; 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, transmitting, by an engine control unit (ECU), a target deceleration value to an electronic stability control (ESC) unit; and performing, by the ESC unit, ADC to automatically brake the vehicle and to automatically adjust a speed of the vehicle to the auto cruise setting speed, wherein the ADC comprises: calculating, by the ESC unit, current deceleration based on a sensing value of a speed sensor disposed on a wheel; driving 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; distributing, by the ESC unit, hydraulic pressures to the one or more hydraulic brakes to achieve a target deceleration; and performing, by the ESC unit, braking activation to the target deceleration using the hydraulic brakes to adjust the speed of the vehicle to the auto cruise setting speed.
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