| 摘要 |
PURPOSE:To smoothly increase a speed in a turbine by providing a control means which closes a bypass valve, controlling a bypass line to be opened and closed, for the preset time in a transfer from an engine brake to an engine drive by the turbine when a rack moving speed exceeds a preset value. CONSTITUTION:In a transfer of an engine 2 from its brake condition by reversing a turbine 4 to a normal operation condition of the engine 2, when a rack moving speed exceeds a preset value corresponding to a large change of an engine load, deciding the engine 2 to be placed in a corresponding acceleration condition, a bypass valve 16 is controlled so as to be forcedly closed for the preset time. Thus properly ensuring an increase of pressure in an exhaust passage 3 supplying exhaust to the turbine 4, an output smoothly increases for an instantaneous control of acceleration of the engine 2. |
