초록 ▼

In an altimetric compensation apparatus and method for a speed change pattern of an automatic transmission, first to third memory locations corresponding respectively to idling, low load and highload conditions of an engine are provided. A feedback air fuel ratio is calculated on the basis of feedba

In an altimetric compensation apparatus and method for a speed change pattern of an automatic transmission, first to third memory locations corresponding respectively to idling, low load and highload conditions of an engine are provided. A feedback air fuel ratio is calculated on the basis of feedback signals from an air fuel ratio sensor. A value in the memory corresponding to the detected running condition of the engine is compensated on the basis of deviation of the feedback air fuel ratio from the base air fuel ratio. When the values in at least two memory locations deviate by at least a predetermined value from the base value, the altimetric compensation value is adjusted and the speed change pattern is altered on the basis of the altimetric compensation value thus obtained.

대표청구항 ▼

An electronic method of controlling an automatic transmission for changing a speed change stage in relation to vehicle speed and opening of a throttle valve in an intake system, said method comprising: measuring an operating parameter of an engine in the vehicle; detecting idling, low load and high

An electronic method of controlling an automatic transmission for changing a speed change stage in relation to vehicle speed and opening of a throttle valve in an intake system, said method comprising: measuring an operating parameter of an engine in the vehicle; detecting idling, low load and high load running conditions of the engine, storing the measured operating parameter according to the detected running conditions in one of first, second and third locations in a memory, respectively, corresponding to these running conditions of the engine; calculating a feedback air fuel ratio on the basis of feedback signals from an air fuel ratio sensor; compensating the value in the memory corresponding to the detected running condition of the engine on the basis of deviation of the feedback air fuel ratio from a base air fuel ratio; adjusting the altimetric compensation value when values in at least two memory locations differ by at least a predetermined value from a base value; and calculating the speed change patterns on the basis of this altimetric compensation value.