Title:
HYBRID CONSTRUCTION MACHINE
Document Type and Number:
Japanese Patent JP2010261538
Kind Code:
A
Abstract:
To enhance power generation efficiency by increasing displacements per rotation of variable displacement type first and second main pumps MP1, MP2 in a state of discharging a standby flow rate even when the rotation speed of an engine E is low.
A controller C supplies the discharge amounts of the first and second main pumps MP1, MP2 to a power generator G when operation valves 2-6, 14-17 are held at neutral positions and, if the rotation speed of the engine E is low at that time, lets low pilot pressures controlled by pressure reducing valves R1, R2 act on regulators 12, 23 which control the tilt angles of the first and second main pumps MP1, MP2.
COPYRIGHT: (C)2011,JPO&INPIT
Inventors:
KAWASAKI HARUHIKO
EGAWA YOSHIHIRO
EGAWA YOSHIHIRO
Application Number:
JP2009113857A
Publication Date:
November 18, 2010
Filing Date:
May 08, 2009
Export Citation:
Assignee:
KAYABA INDUSTRY CO LTD
International Classes:
F15B21/14; E02F9/20; F15B11/00
Domestic Patent References:
| JP2007327527A | 2007-12-20 | |||
| JPH11247801A | 1999-09-14 | |||
| JP2004324694A | 2004-11-18 | |||
| JP2008255699A | 2008-10-23 | |||
| JP2009287745A | 2009-12-10 |
Attorney, Agent or Firm:
Nobuyuki Shima