Patent ID: 8010266
Filing Date: 2011-08-30
Classification: F16H

Abstract:
1. A system for controlling the thrust force of a belt of a continuously variable transmission (CVT), comprising: a road condition determiner for determining a road condition; a safety factor calculator for calculating a safety factor according to the determined road condition; a thrust force calculator for calculating a thrust force of a belt of the CVT based on the calculated safety factor; and a controller for controlling the thrust force of the belt according to the calculated thrust force, wherein the road condition determiner determines the road condition is a rough road condition when the absolute value of a rate of change in rotation speed of the CVT is a predetermined value or a higher in a predetermined frequency or higher for a predetermined period, and the thrust force calculator calculates the thrust force continuously for a first predetermined time by gradually increasing the safety factor to a safety factor calculated by the safety factor calculator when the road condition is the rough road condition.