Hybrid-type construction machine
AssigneesSumitomo Heavy Industries, Ltd., Sumitomo(S.H.I.) Construction Machinery Co., Ltd.
InventorKoji Kawashima
Life of this patent
Estimating the term…
Abstract
A hybrid-type construction machine includes: an engine to drive a variable-volume-type hydraulic pump; a plurality of hydraulic actuators driven by a hydraulic pressure from the variable-volume-type hydraulic pump; and a motor generator driven by an electric power from an electric power accumulator to assist the engine. A maximum output of the variable-volume-type hydraulic pump is equal to or larger than a maximum output of the engine. When operating by setting an output of the variable-volume-type hydraulic pump larger than the maximum output of the engine, the engine is assisted by the motor generator.
Claims13
A hybrid-type construction machine, comprising:
- an engine to drive a variable-volume-type hydraulic pump;
- a plurality of hydraulic actuators driven by a hydraulic pressure from the variable-volume-type hydraulic pump;
- and
- a motor generator driven by an electric power from an electric power accumulator to assist the engine,
- wherein a maximum output of said variable-volume-type hydraulic pump is equal to or larger than a maximum output of said engine, and
- when operating by setting an output of said variable-volume-type hydraulic pump larger than the maximum output of said engine, said engine is assisted by said motor generator.
A control method of a hybrid-type construction machine, the hybrid-type construction machine including:
- an engine to drive a variable-volume-type hydraulic pump;
- a plurality of hydraulic actuators driven by a hydraulic pressure from the variable-volume-type hydraulic pump;
- and
- a motor generator driven by an electric power from an electric power accumulator to assist the engine,
- the control method comprising:
- setting a maximum output of said variable-volume-type hydraulic pump to be equal to or larger than a maximum output of said engine;
- and
- assisting said engine by said motor generator when operating said hybrid-type construction machine by setting an output of said variable-volume-type hydraulic pump larger than the maximum output of said engine.
Dependencies are inferred from the claim text.