公开(公告)号：US20190323389A1

公开(公告)日：2019-10-24

申请号：US16502404

申请日：2019-07-03

Applicant: DENSO CORPORATION

Inventor： Tetsuro MITSUTANI ,  Jing XU

IPC: F01L1/344 ,  F15B15/12 ,  F15B13/02 ,  F15B13/04 ,  F16K15/18 ,  F16K11/07

Abstract: When a supply check valve is opened, the supply check valve enables a flow of oil from an oil supply source toward a pressure accumulation space. When the supply check valve is closed, the supply check valve limits a flow of the oil from the pressure accumulation space toward the oil supply source. When a recycle check valve is opened, the recycle check valve enables a flow of the oil from a retard chamber or an advance chamber toward the pressure accumulation space. When the recycle check valve is closed, the recycle check valve limits a flow of the oil from the pressure accumulation space toward the retard chamber or the advance chamber. A characteristic of the supply check valve with respect to valve opening of the supply check valve is different from a characteristic of the recycle check valve with respect to valve opening of the recycle check valve.