Method for ratio controlling or speed controlling

摘要

Within the scope of the method for ratio control of a continuously variable automatic transmission of a motor vehicle by means of a control loop structure which contains a non-linear compensation member for the variator and controllers for the pressures of both hydraulic routes of the variator pulleys and the variator routes, the control loop structure contains an interference variable observer which generates an interference force FL that reproduces the pattern precision wherein the interference force together with the set value for the adjustment gradient which is limited as result of external standards, forms the compensation member.