Patent ID: 9399856
Filing Date: 2016-07-26
CPC Classification: B60K,B60W,B60Y,E02F,F02D,F15B,Y02T

Claim Text:
1. A hybrid-driven hydraulic working machine comprising: an engine; a hydraulic pump driven rotatably by said engine; an assist electric motor connected to said engine and said hydraulic pump; a plurality of actuators driven by hydraulic fluid delivered by said hydraulic pump; a plurality of operating devices each having an operating member, said operating devices operating said actuators by outputting an operation signal reflecting the operation of said operating member; a storage device that stores a specific revolution speed of said engine suitable for reducing the emissions of air pollutants contained in exhaust gas from said engine; an engine revolution speed setting device that sets said specific revolution speed stored in said storage device as a target revolution speed for said engine; an engine revolution speed control device that controls the revolution speed of said engine based on said target revolution speed for said engine, and an electric motor control device that computes differential torque between the absorption torque of said hydraulic pump and target output torque of said engine and that subjects said assist electric motor to power running control and generation control in accordance with the differential torque, wherein said electric motor control device includes: wherein said electric motor control device uses said other component separated by said filter device as said differential torque, and subjects said assist electric motor to power running control and generation control in such a manner that said trend component serves as the target output torque for said engine.