| 摘要 |
PURPOSE:To aim at improvements in a rate of fuel consumption and operatability, by adding an increment revolving speed signal to the command revolving speed of a fuel throttle lever, while installing a device so as to limit an increasing rate of the increment revolving speed signal as a desired revolving speed signal. CONSTITUTION:An increment revolving speed function generator 12 inputs a revolving speed deviation signal DELTAN and, in turn, generates an increment revolving speed signal Nn'. An increment revolving speed variation limiter 3 limits the maximum value of an increasing rate or a decreasing rate to time of the increment revolving speed signal and outputs a new increment revolving speed signal Nn. A pump controlling function generator 9 inputs a pressure signal P of a discharge pipe 10 for a hydraulic pump 3 and a revolving speed deviation signal DELTAN and, inturn, outputs a pump tilting signal Xq. Thus, the increment revolving speed signal Nn' and a variation are limited to below the fixed value, avoiding a sudden change in the discharge of the hydraulic pump 3, so that a rate of fuel consumption is improvable as well as operatability of a driver can be made ever so better. |
