VALVE OPENING AND CLOSING TIMING CONTROL DEVICE

• Main Authors: SAKAGUCHI KENTA, SHIMPO YUSEI, UEDA KAZUO, KAJITA TOMOHIRO, ASAHI TAKEO
• Format: Patent
• Language: English; Japanese
• Published: 16.01.2020
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES; DEVICES FOR VENTING OR AERATING; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

To constitute a valve opening and closing timing control device capable of effectively restraining a back flow of fluid while smoothly supplying the fluid to a valve unit via a check valve.SOLUTION: The device comprises a valve case in which an internal space is formed in a direction along a rotation shaft core along a cam shaft from outside, and a valve unit housed in the internal space so that it has the same shaft core as the rotation shaft core, and controlling supply and discharge of fluid to and from an advance angle chamber and a retard angle chamber. The valve unit has a check valve CV2 on an upstream side on which the fluid is supplied, and the check valve CV2 includes a valve seat 57 on which a flow hole 57a for flowing the liquid inside, and a valve body 58 having a block part 58a that can block the flow hole 57a. The valve seat 57 has a first protrusion part 57b at a position surrounding the flow hole 57a on a side opposite to the valve body 58. The check valve CV2 is closed by making the block part 58a into contact with the first protrusion part 57b, and is opened by separating the block part 58a from the first protrusion part 58b.SELECTED DRAWING: Figure 11 【課題】弁ユニットに逆止弁を介して流体をスムーズに供給しつつ流体の逆流を効果的に抑制することができる弁開閉時期制御装置を構成する。【解決手段】外部からカムシャフトに亘り、回転軸芯に沿う方向に内部空間が形成されたバルブケースと、回転軸芯と同軸芯になるように内部空間に収容され、進角室および遅角室への流体の給排を制御する弁ユニットを備え、弁ユニットは、流体が供給される上流側に逆止弁ＣＶ２を有し、逆止弁ＣＶ２は、内部に流体が流通する流通孔５７ａが形成された弁座５７と、流通孔５７ａを閉塞可能な閉塞部５８ａを有する弁体５８と、を含んでおり、弁座５７は、弁体５８に対向する側であって流通孔５７ａを囲む位置に第１突起部５７ｂを有し、逆止弁ＣＶ２は、閉塞部５８ａが第１突起部５７ｂに当接することで閉弁され、閉塞部５８ａが第１突起部５８ｂから離間することで開弁される。【選択図】図１１