| 摘要 |
Aspects of the present invention relates to a vehicle control system (1, fig 1) for controlling a vehicle transfer case (3, fig 1). The transfer case (3, fig 1) is operable in a high range and a low range. The vehicle control system (1, fig 1) is configured to output a range change signal to implement a transfer case range change. The vehicle control system (1, fig 1) also outputs a brake control signal for controlling vehicle braking during the range change. The brake may prevent vehicle rool back or control vehicle speed. The vehicle control system can output a range change signal based on one or more parameters, including vehicle speed, vehicle acceleration, loading of the vehicle, rotational speed of the transfer case input shaft, engine speed, operating range of the transfer case. The vehicle control system can output a range change signal when the transmission is in neutral and the speed is within a predefined range/below a threshold. The range change signal may be a manual request, or automatic. |
