Title:
HYDRAULIC PRESSURE SUPPKY DEVICE FOR AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO/2018/163767
Kind Code:
A1
Abstract:
This hydraulic pressure supply device (10) for an automatic transmission comprises: a variable displacement oil pump (20); a regulator valve (40) for regulating the discharge pressure of the oil pump to a predetermined pressure; and a feedback oil passage (57) for conducting hydraulic pressure outputted from the regulator valve (output port C1) to the control chamber (36) of the oil pump. The oil pump is configured such that an increase in hydraulic pressure in the control chamber causes a decrease in the discharge pressure and such that a decrease in hydraulic pressure in the control chamber causes an increase in the discharge pressure. The hydraulic pressure supply device (10) further comprises an oil supply limiting device (80) provided in the feedback oil passage and limiting oil supply to the control chamber more than oil discharge from the control chamber.
Inventors:
MATSUURA KOICHI (JP)
MINAMI TATSUHIRO (JP)
KAJI MASAHIRO (JP)
ISHIYAMA TAKASHI (JP)
MINAMI TATSUHIRO (JP)
KAJI MASAHIRO (JP)
ISHIYAMA TAKASHI (JP)
Application Number:
PCT/JP2018/005663
Publication Date:
September 13, 2018
Filing Date:
February 19, 2018
Export Citation:
Assignee:
MAZDA MOTOR (JP)
International Classes:
F16H61/00; F04C14/22
Foreign References:
| JPS6032580U | 1985-03-05 | |||
| JPH03181673A | 1991-08-07 | |||
| JPS5921093U | 1984-02-08 | |||
| JPS57186683U | 1982-11-26 | |||
| JPS5960088A | 1984-04-05 | |||
| JPH023780A | 1990-01-09 |
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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