Title:
VALVE SYSTEM FOR FOUR-CYCLE ENGINE
Document Type and Number:
Japanese Patent JPH06173619
Kind Code:
A
Abstract:
PURPOSE: To facilitate molding work of respective cams to speed up these valve opening operations when suction and exhaust valves are opened and closed by cam engagement of cams with rocker arms.
CONSTITUTION: Rotational directions A of cam shafts 28 and 29 are determined so that cam engaging positions of cams 33 and 34 with respective rocker arms 23 and 24 come closer to the rotary center O sides of the rocker arms 23 and, 24 at valve opening operation time than at valve closing operation time of suction and exhaust valves 10 and 19.
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Inventors:
KINOSHITA HISATOSHI
TSUCHIDA NAOKI
TSUCHIDA NAOKI
Application Number:
JP35208992A
Publication Date:
June 21, 1994
Filing Date:
December 08, 1992
Export Citation:
Assignee:
YAMAHA MOTOR CO LTD
International Classes:
F01L1/053; F01L1/08; F01L1/18; F01L1/12; F01L1/26; F02F1/24; F02F1/42; (IPC1-7): F01L1/12; F01L1/18
Attorney, Agent or Firm:
Tadao Sawada
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