Title:
EXCAVATOR
Document Type and Number:
WIPO Patent Application WO/2020/203884
Kind Code:
A1
Abstract:
An excavator (100) is provided with: a lower travelling body (1); an upper revolving body (3); an engine (11); an electrically controlled left main pump (14L); an electrically controlled right main pump (14R); a left regulator (13L) that controls a displacement capacity of the left main pump (14L); a right regulator (13R) that controls a displacement capacity of the right main pump (14R); and a controller (30) that electrically controls the left regulator (13L) and the right regulator (13R). The controller (30) calculates a limit value for the respective displacement capacities of the left main pump (14L) and the right main pump (14R) on the basis of a discharge pressure with respect to the left main pump (14L) and the right main pump (14R), and controls the respective displacement capacities of the left main pump (14L) and the right main pump (14R) on the basis of the calculated limit values.
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Inventors:
SANO KIMINORI (JP)
SHIRATANI RYUJI (JP)
SHIRATANI RYUJI (JP)
Application Number:
PCT/JP2020/014312
Publication Date:
October 08, 2020
Filing Date:
March 27, 2020
Export Citation:
Assignee:
SUMITOMO CONSTRUCTION MACHINERY CO LTD (JP)
International Classes:
E02F9/20; E02F9/22; F15B11/02
Foreign References:
| JPH11108181A | 1999-04-20 | |||
| JP2009019432A | 2009-01-29 | |||
| JP2000104290A | 2000-04-11 | |||
| JP2001241384A | 2001-09-07 | |||
| JPH10280490A | 1998-10-20 | |||
| JP2019069171A | 2019-05-09 |
Other References:
See also references of EP 3951092A4
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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