VALVE OPENING/CLOSING TIMING CONTROL DEVICE

• Main Authors: YAMAKAWA YOSHIAKI, ASAHI TAKEO, MARUYAMA KOICHI, SAKATA SATOSHI
• Format: Patent
• Language: English; Japanese
• Published: 16.05.2023
• Subjects: BLASTING; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

To provide a valve opening/closing timing control device capable of properly suppressing impact shock in contact of a stopper and preventing breakage and deterioration of strength.SOLUTION: A valve opening/closing timing control device includes a driving-side rotor A, a driven-side rotor B, and a phase adjustment mechanism for determining a relative rotation phase by driving force of an electric actuator. A stopper 24 extending outward in a radial direction and a plurality of projecting bodies 25 are formed on an outer periphery of the driven-side rotor B, and the driving-side rotor A includes a stopper chamber 16 for housing the stopper 24, and a projecting body chamber 17 for housing the projecting bodies 25. An axial first clearance D1 along a rotating axis X is formed between an inner face of the stopper chamber 16 and the stopper 24, an axial second clearance D2 along the rotating axis X is formed between an inner face of the projecting body chamber 17 and the projecting bodies 25, and the axial first clearance D1 is determined to be larger than the axial second clearance D2.SELECTED DRAWING: Figure 2 【課題】ストッパが当接した際の衝撃を良好に抑制し、破損や強度低下を招き難い弁開閉時期制御装置を提供する。【解決手段】駆動側回転体Ａと従動側回転体Ｂと電動アクチュエータの駆動力により相対回転位相を設定する位相調節機構とを備えている。従動側回転体Ｂの外周に、半径方向の外方に延びるストッパ２４、複数の突出体２５とが形成され、駆動側回転体Ａが、ストッパ２４を収容するストッパ室１６と、突出体２５を収容する突出体室１７とを備え、ストッパ室１６の内面とストッパ２４との間に、回転軸芯Ｘに沿う軸方向第１間隙Ｄ１が形成され、突出体室１７の内面と、突出体２５との間に、回転軸芯Ｘに沿う軸方向第２間隙Ｄ２が形成され、軸方向第１間隙Ｄ１が軸方向第２間隙Ｄ２より大きく設定されている。【選択図】図２