| 摘要 |
PURPOSE: To lower the revolving speed of an engine to be no longer sufficient to allow an engine torque to overcome traveling resistance by utilizing a comparing value depending on the minimum revolutions of an engine as a comparing speed when a comparing value depending on the speed of wheels becomes smaller than the comparing value depending on the minimum revolutions of the engine. CONSTITUTION: A reference value is formed for controlling driving slippage this reference value accepts a comparing value depending on the minimum revolutions of an engine by a sensor 5 at the time of forming the reference value. In a comparator 11, when a comparing value depending on the speed of wheels based on sensors 1, 2 becomes smaller than the comparing value depending on the minimum revolutions, the comparing value depending on the minimum revolutions forms the reference value. At this time, an engine reference value RefM is given in the relation of RefM=max[ (Vnal+Vnar)/2+S};nmin /u]. At this time, Vnal, Vnar are respectively the speed of non-driving wheels; nmin is the minimum revolutions of the engine; (u) is the gear change ratio of a power train and S is a prescribed slip value. |
