BRAKE SYSTEM - HITACHI CONSTRUCTION MACH CO

Title:

BRAKE SYSTEM

Document Type and Number:

WIPO Patent Application WO/2019/022229

Kind Code:

A1

Abstract:

An automatic brake system (24) is configured to include: second accumulators (25F, 25R); a front side second pipeline (28) and a rear side second pipeline (29); second brake valves (30F, 30R); a first electromagnetic switching valve (32); first shuttle valves (33F, 33R); and a controller (37). A second electromagnetic switching valve (34F) and a pressure sensor (35F) are provided in the front side second pipeline (28), and a second electromagnetic switching valve (34R) and a pressure sensor (35R) are provided in the rear side second pipeline (29). If, on the basis of the pressure of a working fluid detected by the pressure sensors (35F, 35R) and an operation signal supplied to the first electromagnetic switching valve (32) or the second brake valves (30F, 30R), it is determined that the second brake valves (30F, 30R) are not operating normally, the controller (37) performs control to switch the second electromagnetic switching valves (34F, 34R).

More Like This:

WO/2001/012487

PARKING CONTROL CIRCUIT

Inventors:

TANAKA TAKAAKI (JP)
IKARI TAKANOBU (JP)
TSURUGA YASUTAKA (JP)
SATO TAKAYUKI (JP)
SASAKI TAKASHI (JP)

Application Number:

PCT/JP2018/028237

Publication Date:

January 31, 2019

Filing Date:

July 27, 2018

Export Citation:

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Assignee:

HITACHI CONSTRUCTION MACH CO (JP)

International Classes:

B60T13/68; B60T7/16; B60T13/14; B60T17/18; F15B20/00; F16K31/06

Foreign References:

JP2011213347A	2011-10-27
JPS5940161U	1984-03-14
US20090309412A1	2009-12-17
US20140110995A1	2014-04-24
US20090309412A1	2009-12-17

Other References: