US 12,473,933 B2
Hydraulic circuit
Masahiro Kusuda, Kanagawa (JP); Hisao Nobu, Tokyo (JP); Yuki Tawara, Shizuoka (JP); Takahiro Ikeda, Kanagawa (JP); Masayuki Shimizu, Kanagawa (JP); Masanori Satou, Tokyo (JP); Norihiro Ishikawa, Kanagawa (JP); Kenji Kojima, Kanagawa (JP); Kenji Sakakibara, Kanagawa (JP); and Daisuke Yanagawa, Kanagawa (JP)
Assigned to JATCO LTD, Fuji (JP); and Nissan Motor Co., Ltd., Yokohama (JP)
Appl. No. 18/867,078
Filed by JATCO LTD, Fuij (JP); and Nissan Motor Co., Ltd., Yokohama (JP)
PCT Filed May 12, 2023, PCT No. PCT/JP2023/017940
§ 371(c)(1), (2) Date Nov. 19, 2024,
PCT Pub. No. WO2024/004407, PCT Pub. Date Jan. 4, 2024.
Claims priority of application No. 2022-106720 (JP), filed on Jun. 30, 2022.
Prior Publication US 2025/0314260 A1, Oct. 9, 2025
Int. Cl. F15B 11/17 (2006.01); F15B 13/02 (2006.01); F15B 20/00 (2006.01); F15B 21/041 (2019.01); F16H 61/00 (2006.01)
CPC F15B 13/024 (2013.01) [F15B 11/17 (2013.01); F15B 20/005 (2013.01); F15B 21/041 (2013.01); F16H 61/0031 (2013.01); F15B 2211/30505 (2013.01); F15B 2211/55 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A hydraulic circuit comprising:
a first oil path that links to a discharge port of a first oil pump;
a second oil path that links to a discharge port of a second oil pump;
a hydraulic control circuit in which a first regulator valve is disposed downstream of a confluence point of the first oil path and the second oil path;
a third oil path that connects a suction port of the first oil pump and a strainer;
a check valve that is provided in the third oil path and restricts a movement of oil toward the strainer side; and
a relief valve that is provided in the third oil path and discharges oil in the third oil path to an outside when a pressure in the third oil path exceeds a reference pressure.