| 摘要 |
PURPOSE:To always obtain a appropriate engine brake, by setting the desired output horse power to a negative value in accordance with the opening degree of an accelerator if the latter is less than a predetermined value when the desired output horse power is computed in accordance with the opening degree of the accelerator and the speed of a vehicle. CONSTITUTION:During running of a vehicle, a computing unit 100 computes a desired output horse power PS deg. in accordance with an accelerator opening degree thetaac and a vehicle speed V. In this case, when the opening degree of an accelerator is less than a predetermined value which is other than a value corresponding to the full close position of the accelerator, to desired output horse power PS deg. is set to a negative value corresponding to the opening degree of the accelerator and the speed of the vehicle. Then a computing unit 102 computes a desired input side rotational speed Nin deg. for a stepless speed change gear in accordance with the desired horse power PS deg., and a control system 104 controls a flow control valve in a hydraulic circuit for the stepless speed change gear in accordance with the desired input side rotational speed Nin deg.. Further, a computing unit 108 computes a desired opening degree from a desired engine torque Te deg. and an actual torque Te which are obtained by a computing unit 106 in accordance with the above-mentioned data PS deg., an actual input side rotational speed Nin. |
