Construction machine

摘要

A construction machine including an internal combustion engine controlled based on a torque command, an electric motor mechanically connected to the internal combustion engine, and an electric energy storage device that supplies electric power to the electric motor, the construction machine performing work by driving a hydraulic pressure generator using the internal combustion engine and the electric motor, the construction machine including: a speed control device that controls a speed of the electric motor based on a speed command; and a torque limiter that limits the torque command relative to a torque target, wherein the torque command is limited by the torque limiter in such a manner that a rate of change with time of the torque command is limited to be equal to or less than a predetermined value.

主权项

1. A construction machine comprising:
an internal combustion engine controlled based on a torque command; an engine controller that controls the internal combustion engine such that an output torque of the internal combustion engine becomes equal to the torque command; an electric motor mechanically connected to the internal combustion engine; an electric energy storage device that supplies electric power to the electric motor, the construction machine performing work by driving a hydraulic pressure generator using the internal combustion engine and the electric motor; a speed control device that controls a speed of the electric motor based on a speed command; and a torque limiter that outputs a torque command relative to a torque target of the internal combustion engine to the controller, wherein
the torque limiter limits the torque command relative to the torque target of the internal combustion engine such that a rate of change with time of the torque target of the internal combustion engine becomes equal to or less than a predetermined value.