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US 10,704,230 B2Granted
Shovel
AssigneesSumitomo Heavy Industries, Ltd., Sumitomo(S.H.I.) Construction Machinery Co., Ltd.
InventorsEisuke Matsuzaki, Daisuke Kitajima
Life of this patent
Estimating the term…
Abstract
A shovel includes a lower traveling body, an upper rotating body, an attachment including a boom and an arm, a controller, an engine, and a hydraulic pump that is driven by the engine and discharges hydraulic oil to drive the attachment. The controller is configured to obtain a hydraulic load applied to the attachment and calculate an engine speed command at predetermined time intervals based on the obtained hydraulic load.
Claims14
A shovel, comprising:
- a lower traveling body;
- an upper rotating body;
- an attachment including a boom and an arm;
- a controller;
- an engine;
- and
- a hydraulic pump that is driven by the engine and discharges hydraulic oil to drive the attachment,
- wherein the controller is configured to obtain a hydraulic load applied to the attachment, and increase an engine speed command as the hydraulic load increases and decrease the engine speed command after the hydraulic load increases, by predicting an engine speed that provides an engine output corresponding to the obtained hydraulic load based on the obtained hydraulic load and outputting the engine speed command corresponding to the predicted engine speed at predetermined time intervals.
5 more elements
Dependencies are inferred from the claim text.