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公开(公告)号：US20240166256A1
公开(公告)日：2024-05-23
申请号：US18284440
申请日：2022-03-15
Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
Inventor： Kengo TAMURA , Akihito NIBE
CPC classification number: B62D5/093 , B62D5/0475 , B62D5/063 , B62D5/075
Abstract: A steering apparatus for an industrial vehicle includes: a manual steering circuit which includes a first valve opened/closed according to an operation of a steering wheel and supplies hydraulic oil discharged from a hydraulic pump to a steering cylinder through the first valve; an automatic steering circuit which includes a second valve opened/closed according to a calculation result of automatic operation control and supplies the hydraulic oil discharged from the hydraulic pump to the steering cylinder through the second valve; and a branching valve which is disposed between the hydraulic pump and the first and second valves and branches the hydraulic oil to the manual steering circuit and the automatic steering circuit. The branching valve is a priority valve which preferentially supplies the hydraulic oil to the manual steering circuit at a designed flow rate equal to or larger than a predetermined flow rate for operating the steering cylinder.
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公开(公告)号：US20170130742A1
公开(公告)日：2017-05-11
申请号：US15340012
申请日：2016-11-01
Inventor： Tetsuya GOTO , Kenichi HAGINO , Yasushi KUWANO , Akihito NIBE , Shigeto NAKAJIMA , Satoshi TAKANO
CPC classification number: F15B1/26 , B66F9/22 , E02F9/2228 , E02F9/2267 , F15B13/024 , F15B2211/255 , F15B2211/40592 , F15B2211/55
Abstract: When an engine stall is likely to occur, the pressure of the back pressure chamber of a relief pressure valve is released to adjust the relief pressure of the relief pressure valve. This actuates a pressure compensating circuit to release the pressure in a control circuit to an oil tank. Thus, a rapid increase of the pressure due to a cargo handling operation is restricted, and an engine stall due to insufficient torque of the engine is avoided.
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