| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller of a power-saving hybrid type construction machine of low fuel consumption, for suppressing transient assist output by an electric power generator when accelerating an engine. <P>SOLUTION: The controller of the construction machine includes: a rotation speed sensor 16 for detecting the actual rotation speed of an engine 1; a target rotation speed setting part 17 for determining a target rotation speed of the engine; load detection means 21 for detecting the load of a hydraulic pump 3; an assist output computing part 19 for calculating the assist output to be generated by the electric power generator 2 on the basis of a rotation speed deviation ΔN which is a difference between the actual rotation speed and the target rotation speed or the load of the hydraulic pump 3; an absorption torque upper limit computing part 23 for calculating an absorption torque upper limit value of the hydraulic pump 3; and an operation signal generation part 24 for generating an operation signal to be outputted to a pump capacity adjusting device 45. When the rotation speed deviation ΔN is equal to or larger than a set value NC set corresponding to the size of the assist output, the absorption torque upper limit computing part 23 reduces the absorption torque upper limit value of the hydraulic pump 3 from the calculated value. <P>COPYRIGHT: (C)2012,JPO&INPIT |
