Title:
建設機械の駆動システム
Document Type and Number:
Japanese Patent JP7029939
Kind Code:
B2
Abstract:
A drive system of a construction machine includes: a controller that controls a fuel injection valve, so an actual rotation speed of an engine is adjusted to a setting rotation speed; a hydraulic circuit including a boom cylinder supplied with hydraulic oil from a pump driven by the engine, configured so energy is regenerated as motive power owing to the pump being driven by pressurized oil discharged from the boom cylinder at boom lowering; and a boom operation device including a boom operation lever. At boom lowering, the controller cuts a fuel supply to the engine when a cutting condition is satisfied, which is defined to include that an operating amount of the lever is less than or equal to a first threshold, and resumes the fuel supply when the cutting condition stops being satisfied or when the actual rotation speed of the engine becomes less than a second threshold.
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| JP6255442 | Valve body |
Inventors:
Tetsuhiro Kondo
Takehisa Kato
Muraoka Hideyasu
Takehisa Kato
Muraoka Hideyasu
Application Number:
JP2017221659A
Publication Date:
March 04, 2022
Filing Date:
November 17, 2017
Export Citation:
Assignee:
Kawasaki Heavy Industries, Ltd.
International Classes:
F15B11/00; E02F9/22; F15B21/14
Domestic Patent References:
| JP2016017602A | ||||
| JP4024120B2 | ||||
| JP2013170406A | ||||
| JP2004011168A | ||||
| JP2011149473A | ||||
| JP2013170596A |
Foreign References:
| US20130098019 |
Attorney, Agent or Firm:
Aiko Patent Office, a patent business corporation