Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2017/154187
Kind Code:
A1
Abstract:
Provided is a work machine in which resonance and lug-down do not readily occur and fine adjustments to engine speed are readily made in high-speed ranges, even when between the minimum speed and maximum speed of the engine there is a speed range in which torque rapidly decreases when speed decreases. This work machine is characterized in that speeds that can be set as a target speed exclude a range between a first speed that is higher than the minimum speed of the engine and a second speed that is higher than the first speed and lower than the maximum speed, and the ratio of the change in the target speed relative to the change in the manipulated variable of an engine speed indication device when the engine speed indication device has been moved from a manipulated variable indicating the minimum speed of the engine to a manipulated variable indicating the first speed is greater than the ratio of the change in the target speed relative to the change in the manipulated variable of the engine speed indication device when the engine speed indication device has been moved from a manipulated variable indicating the second speed of the engine to a manipulated variable indicating the maximum speed.
Inventors:
IMURA SHINYA (JP)
NISHIKAWA SHINJI (JP)
EDAMURA MANABU (JP)
ISHIKAWA KOUJI (JP)
HOSHINO MASATOSHI (JP)
ISHIHARA SHINJI (JP)
NISHIKAWA SHINJI (JP)
EDAMURA MANABU (JP)
ISHIKAWA KOUJI (JP)
HOSHINO MASATOSHI (JP)
ISHIHARA SHINJI (JP)
Application Number:
PCT/JP2016/057681
Publication Date:
September 14, 2017
Filing Date:
March 10, 2016
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F02D45/00
Foreign References:
| JP2008169796A | 2008-07-24 | |||
| JP2009008072A | 2009-01-15 | |||
| JP2011157751A | 2011-08-18 |
Other References:
See also references of EP 3441598A4
Attorney, Agent or Firm:
KAICHI IP (JP)
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