Throttle-valve opening degree control for automatic step-wise transmission system

DETAILED DESCRIPTION These objects and other features of the present invention are accomplished by providing a method for controlling an automatic step-wise transmission system of a vehicle including a vehicle engine, comprising the steps of: acquiring real throttle-valve opening degree data of the vehicle engine; checking whether or not conditions of the vehicle engine are under learning conditions when said real throttle-valve opening degree data is acquired; calculating a difference between said real throttle-valve opening degree data acquired under the learning conditions and reference throttle-valve opening degree data previously stored so as to obtain a correction value for said real throttle-valve opening degree data; correcting said real throttle-valve opening degree data based upon said correction value to produce controlling throttle-valve opening degree data; and, controlling the automatic step-wise transmission system based upon said controlling throttle-valve opening degree data so as to perform a gear-changing operation of the vehicle engine.
Furthermore, according to the invention, an apparatus for controlling an automatic step-wise transmission system of a vehicle including a vehicle engine, comprising: means (106; 107) for acquiring real throttle-valve opening degree data of the vehicle engine; means (132) for checking whether or not conditions of the vehicle engine are under learning conditions when said real throttle-valve opening degree data is acquired; means (102) for previously storing reference throttle-valve opening degree data; means (134; 136) for calculating a difference between said real throttle-valve opening degree data acquired under the learning conditions and said reference throttle-valve opening degree data previously stored in said storing means (102) so as to obtain a correction value for said real throttle-valve opening degree data; means (104) for temporarily storing said correction value derived from said calculating means (134; 136); means (139) for correcting said real throttle-valve opening degree data by adding said correction value thereto so as to produce controlling throttle-valve opening degree data; and, means (138) for controlling the automatic step-wise transmission system based upon said controlling throttle-valve opening degree data so as to perform a gear-changing operation of the vehicle engine