Driving condition recognition system for an automotive vehicle and shift control system for an automotive automatic power transmission utilizing the results of vehicular driving state recognition

A system for controlling shifting of an automotive automatic power transmission comprising:

• a vehicle speed sensor for monitoring a vehicle speed for producing a vehicle speed data;
• a throttle angle sensor for monitoring a throttle valve angular position for producing a throttle angle data;
• a shift pattern selection means for selecting one of a plurality of transmission speed ratio shifting pattern respectively adapted to vehicular driving modes, said shift pattern selection means being associated with a driving condition recognizing means which includes:
• first means for monitoring a plurality of preselected parameters reflecting a vehicle driving condition and sampling parameter data of respective parameters with a given intervals;
• second means for processing sampled parameter data of each parameter for deriving a parameter associated evaluation data of the corresponding parameter;
• third means utilizing a plurality of evaluating functions respectively set with respect to the corresponding parameter, for deriving distribution of said parameter associated evaluation data over a plurality of predetermined value ranges respectively corresponding a plurality of vehicular driving modes to produce a distribution indicative data;
• and
• fourth means for processing the distribution indicative data of all parameters for deriving a vehicle driving condition indicative data;
• and
• a shift control means for deriving a transmission speed ratio on the basis of said vehicle speed data and said throttle angle data according to selected one of the shift patterns.