Patent ID: 6169949
Filing Date: 2001-01-02
Classification: B60K,B60W,F16H,Y10T

Abstract:
In a control apparatus of an automatic transmission mounted on a vehicle for transmitting an output of an engine to driving wheels through a torque converter and the automatic transmission, in response to a condition of the vehicle comprised of at least a state of said engine and a condition of said automatic transmission a command value is calculated, and in accordance with said calculated command value a command is outputted, and a shift control for varying a continuously a transmission ratio of said automatic transmission is carried out, the control apparatus of the automatic transmission for the vehicle comprises wherein a road gradient estimation block for calculating a road gradient of a road surface on which said vehicle runs in accordance with an input side rotation member rotation number and an output side rotation member rotation number of said automatic transmission and an engine condition amount indicating the condition of said engine; a target vehicle speed value decision block for calculating a target value of a vehicle speed of said vehicle in accordance with said road gradient which is calculated in said road gradient estimation block and said output side rotation member rotation number; a target transmission ratio calculation block for calculating a target value of said transmission ratio of said automatic transmission in accordance with said target value of said vehicle speed of said vehicle which is decided in said target vehicle speed value decision block, said input side rotation member rotation number, said output side rotation member rotation number, and a throttle valve opening degree for controlling an air amount which is introduced into said engine; and a transmission operation command output block for calculating said command value in accordance with said input side rotation member rotation number, said output side rotation member rotation number, and said target value of said transmission ratio which is calculated in said target transmission ratio calculation block.