Title:
FOUR-WHEEL STEERING DEVICE
Document Type and Number:
Japanese Patent JPH01172059
Kind Code:
A
Abstract:
PURPOSE:To steer the front and rear wheels by opposite phases in the early period of steering and by the same phase in the later period of steering, by connecting a first order delay circuit to one of a plurality of control cylinders in communication with a power cylinder for front wheels, and thereby changing over a control valve with a certain delay. CONSTITUTION:When from wheels are steered to the right, pressure fluid flows into pressure chambers 44, 59 of control cylinders S1, S2 upon passing though a passage 48. As the pressure fluid flowing into the pressure camber 44 at this time passes through a first order delay circuit consisting of in orifice 50 and an accumulator 56, the rise of the pressure will be delayed. Accordingly the pressure in the pressure chamber 59 rises earlier to cause movement of a piston 43 in the direction 60, so that a spool 40 of a control valve V is changed over to the left position through the action of a rod 41. As a result, the pressure fluid flows into a pressure chamber of a power cylinder C2 for rear wheels to steer them to the left. When thereafter the accumulator 56 is filled, the rear wheels are steered to the right.
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Inventors:
ARAI JUNICHI
KATO HISAMI
MORI YASUO
KATO HISAMI
MORI YASUO
Application Number:
JP32870187A
Publication Date:
July 06, 1989
Filing Date:
December 25, 1987
Export Citation:
Assignee:
KAYABA INDUSTRY CO LTD
International Classes:
B62D5/07; B62D6/02; B62D7/14; (IPC1-7): B62D5/07; B62D7/14
Attorney, Agent or Firm:
Nobuyuki Shima