| 摘要 |
PURPOSE:To increase the running safety of a car and enable its saved fuel consumption drive by obtaining the quantity corresponding to the running resistance from the accelerstion and loading weight of the car and determining the optimum gear stage and the timing of shift change. CONSTITUTION:When a car runs, an electronic control circuit 2 determines a gear stage to be used for the number of engine rotations Nnot equal to 0 and car speed not equal to 0 and obtains the effective pressure PMEa averaged by axes at running from a memory map according to the engine load L and the number of engine rotations N assuming that a clutch is connected. If this value PMEa is larger than a certain constant value and an accelerator step-in is judged, the fuel consumption rate per gear stage is retrieved by calculating the effective pressure PMEc averaged by axes required for running matching the running resistance, the number of engine rotations No of other gear stages, and the effective pressure PMEo averaged by axes. Then, the gear stage for which the fuel consumption is maximized is determined and shift control is performed in accordance with the results of comparison between the present gear stage and the gear stage to be used. |
