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公开(公告)号：US20170247238A1
公开(公告)日：2017-08-31
申请号：US15506166
申请日：2015-08-25
申请人： DOOSAN CORPORATION
发明人： Byung Kwon LEE
CPC分类号： B66F9/22 , B66F9/06 , B66F9/075 , F15B1/021 , F15B11/08 , F15B13/024 , F15B13/0401
摘要： The present disclosure relates to a hydraulic circuit for a forklift, and more particularly, to a hydraulic circuit for a forklift which is capable of preventing an engine from being stopped due to surge pressure that instantaneously occurs when a lift cylinder reaches an end stroke and thus cannot be operated any further when the lift cylinder is extended. According to the hydraulic circuit for a forklift according to the exemplary embodiment of the present disclosure, which is configured as described above, the accumulator is provided on the hydraulic line through which the working fluid is provided to the lift cylinder, and as a result, the accumulator may quickly absorb surge pressure when the surge pressure is produced in the lift cylinder or the hydraulic line.
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公开(公告)号：US20190218083A1
公开(公告)日：2019-07-18
申请号：US16327470
申请日：2017-08-24
申请人： DOOSAN CORPORATION
发明人： Deok Rae KIM , Yong Seok RYU , Byung Kwon LEE , Jun Il YI
CPC分类号： B66F9/22 , B66F9/0755 , B66F9/07572 , B66F9/12 , B66F17/003 , F02D29/04 , F15B11/166
摘要： A forklift according to an exemplary embodiment of the present disclosure includes: a first hydraulic pump and a second hydraulic pump each of which generates a working fluid; a lift cylinder which raises or lowers a carriage; a first hydraulic line which supplies the working fluid from the first hydraulic pump to the lift cylinder and a second hydraulic line which supplies the working fluid from the second hydraulic pump to the lift cylinder; a first lift spool which controls the working fluid to be supplied to the lift cylinder through the first hydraulic line and a second lift spool which controls the working fluid to be supplied to the lift cylinder through the second hydraulic line; a first pilot line which transmits a pilot signal for operating the first lift spool and a second pilot line which transmits a pilot signal for operating the second lift spool; and an opening/closing valve which selectively closes any one of the first pilot line and the second pilot line.
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公开(公告)号：US20210372341A1
公开(公告)日：2021-12-02
申请号：US16322527
申请日：2017-08-02
申请人： DOOSAN CORPORATION
发明人： Byung Kwon LEE
摘要： Disclosed is an industrial vehicle work guide system. An industrial vehicle work guide system according to an embodiment of the present invention includes: a memory configured to store engine used data, a driving time, a fuel consumption amount, and reference fuel efficiency; a display module configured to output a guide message; and an analysis module configured to calculate actual fuel efficiency by using the engine used data, the driving time, and the fuel consumption amount, compare the actual fuel efficiency with the reference fuel efficiency, and control the display module so that the display module outputs a guide message when the actual fuel efficiency is lower than the reference fuel efficiency.
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