Patent ID: 8825316
Filing Date: 2014-09-02
Classification: E02F,H02P

Abstract:
1. A hybrid-type construction machine comprising an engine ( 22 ), a hydraulic pump ( 41 ) driven by said engine ( 22 ), a swing structure ( 20 ), an electric motor ( 25 ) and a hydraulic motor ( 27 ) for driving said swing structure ( 20 ), a swing control lever ( 72 ) operated by an operator to drive said swing structure ( 20 ), an electrical storage device ( 24 ) for storing electrical energy to be supplied to said electric motor ( 25 ), and a controller ( 80 ) to which is input a signal reflecting the amount and direction of operation of said swing control lever ( 72 ) and which controls charging and discharging of said electrical storage device ( 24 ); wherein said controller ( a computing unit which, if the amount of stored electricity in said electrical storage device (