Integrated control system for electronically-controlled engine and automatic steplessly variable transmission

摘要

An integrated control system for both an electronically-controlled engine and a steplessly variable automatic transmission, comprises a speed-change ratio arithmetic processing section for calculating the speed-change ratio (Roi) as a ratio (Ni/No) of the transmission input speed (No) to the transmission output speed (No), a target driving torque arithmetic processing section (A) for retrieving a target driving torque (tTd), based on both the accelerator operating amount (APS) and the vehicle speed (VSP), from a first predetermined characteristic map, and a target speed-change ratio arithmetic processing section (B) for retrieving a target speed-change ratio (tRoi), based on both the accelerator operating amount (APS) and the vehicle speed (VSP), from a second predetermined characteristic map. Also provided is a target engine output torque arithmetic processing section (C) for calculating a target engine output torque (tTe), based on all of the target driving torque (tTd), the speed-change ratio (Roi), and a speed ratio (e) of the transmission input speed (Ni) to the engine speed (Ne). Depending on the engine speed (Ne) and the target engine output torque (tTe), the throttle opening (TPS) and the transmission input speed (Ni) are both feedback-controlled.