Patent Number: 8,798,876

Title: Hybrid working machine and controlling method thereof

Abstract: In a hybrid working machine, a control unit corrects an output upper limit value of an engine based on a deviation between a target revolution speed of the engine and an actual revolution speed of the engine, and output values of a motor generator, a hydraulically driven unit and an electrically driven unit are determined based on the corrected output upper limit value of the engine, or the control unit corrects an output lower limit value of the motor generator based on a deviation between the target revolution speed of the engine and the actual revolution speed of the engine, and the output values of the motor generator, the hydraulically driven unit and the electrically driven unit are determined based on the corrected output lower limit value of the motor generator.

Inventors: Yanagisawa; Makoto (Kanagawa, JP)

Assignee: Sumitomo Heavy Industries, Ltd.

International Classification: F02D 13/02 (20060101)

Expiration Date: 8/05/12018