Title:
VALVE SYSTEM FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JPH01134018
Kind Code:
A
Abstract:
PURPOSE:To eliminate fluctuation of close valve speed by providing a throttle mechanism for communicating between a damper chamber and a working oil chamber in a hydraulic drive mechanism arranged between a cam and an intake (exhaust) valve, while further providing a bypath provided with a variable throttle and detouring the throttle mechanism. CONSTITUTION:In a system where an intake valve 5 is opened/closed through a lifter 13 slidable with a cam 9 on a cam shaft 8 interlocked with a crankshaft, a hydraulic drive mechanism 10 for opening/closing an intake valve 5 corresponding to the profile of the cam 9 is arranged between the lifter 13 and the intake valve 5. The hydraulic drive mechanism 10 is provided with a valve side piston 12 and a cam side piston 14 fitted to the lower and upper sections of a cylinder 11. A throttle mechanism 32 communicating between a damper chamber 26 and a working oil chamber 27 is also provided. A bypath 43 detouring the throttle mechanism 32 and coupling between the chambers 26, 27 is formed and a variable throttle mechanism 47 to be controlled corresponding to the viscosity of working oil and the operating state of engine is arranged in the bypath 43.
Inventors:
YAGI TORU
FUJIYOSHI YOSHIHIRO
AOKI TAKATOSHI
URATA YASUHIRO
FUJIYOSHI YOSHIHIRO
AOKI TAKATOSHI
URATA YASUHIRO
Application Number:
JP29262387A
Publication Date:
May 26, 1989
Filing Date:
November 19, 1987
Export Citation:
Assignee:
HONDA MOTOR CO LTD
International Classes:
F01L1/16; F01L9/14; F01L13/00; F01L31/22; (IPC1-7): F01L9/02
Attorney, Agent or Firm:
Ken Ochiai
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