Vehicle speed control method and device when towing heavy load trailer

摘要

Disclosed is a method and apparatus for controlling vehicle speed when towing a high-load trailer. The vehicle speed control method when towing a high-load trailer according to the present invention includes determining whether the trailer is in a trailer towing mode, in the case of a trailer towing mode, determining whether it is a slope climbing situation using a G sensor-based road gradient value, and in the case of a ramp climbing situation, the G sensor. The step of calculating the difference value between the based road gradient value and the torque-based road gradient value, and determining whether the tow trailer is a high-load trailer based on the calculated difference value, and if the tow trailer is determined as a high-load trailer, use a shift map dedicated to the high-load trailer. The summary is to include the step of controlling the shift.