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CAM DRIVE CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
申请公布号：JP2002013404(A)
申请号：JP20000197556
申请日期：2000.06.30
申请公布日期：2002.01.18
发明人：NAKAMURA MAKOTO;HARA SEINOSUKE
分类号：F01L13/00;(IPC1-7):F01L13/00
主分类号：F01L13/00
摘要：PROBLEM TO BE SOLVED: To prevent lowering of durability caused as rattling and hammering is generated between both supporting surfaces of a movable cam against a camshaft in a state where a cam nose part advances in the maximum and as eccentric abrasion due to one side contact is caused. SOLUTION: The cam nose part 24 is formed free to advance and retreat to and from a valve lifter 16 by providing the movable cam 17 to make a suction valve 12 work to open by torque of the camshaft 13 free to move in the diametrical direction through a slot 26 for sliding against the camshaft 13. One end part outer peripheral surface 20c of a mounting portion 20 of the camshaft is formed in a circular arc surface, and one end part inner peripheral surface 26a of the movable cam to be supported on the outer peripheral surface is also formed in a circular arc surface. Additionally, a disconnecting mechanism 19 to connect and fix the movable cam to and on the camshaft or to release connection and fixing in accordance with an engine driving state is provided.
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