Title:
VALVE GEAR FOR V-TYPE FIVE VALVE ENGINE
Document Type and Number:
Japanese Patent JPH04134103
Kind Code:
A
Abstract:
PURPOSE:To get rid or any overhang to the V-bank inside of a cover housing a chain wheel of the like as well as to expand a space in the bank by bringing an inlet camshaft near to the side of a cylinder shaft center, while installing the intermediate chain wheel at the exhaust side after being deflected. CONSTITUTION:Three inlet openings and two exhaust openings are formed in a combustion recess in the lower part of a cylinder head 4, and these openings are opened or closed by an inlet valve 14 and an exhaust valve 15. These inlet and exhaust valves 14, 15 are opened or closed by each rotation of an inlet camshaft 24 and an exhaust camshaft 25, and these camshafts 24, 25 are driven by a crankshaft 9 via an intermediate gear train. At this time, a distance A betwee the inlet camshaft 24 and a cylinder shaft center should be set to be smaller than that (a distance B) between the exhaust camshaft and the cylinder shaft center C, and an intermediate chain wheel 35 driving both inlet and exhaust cam chain wheels 24a, 25a attached tight to those of inlet camshaft 24 and exhaust camshaft 25 is made so as to be installed in an interval between both cam chain wheels 24a, 25a and the crankshaft 9 and in a position deflected to the exhaust side from the cylinder shaft center C as looking in the crankshaft direction.
Inventors:
KOYAIZU TAKESHI
IIKURA MASAHIKO
IIKURA MASAHIKO
Application Number:
JP25787790A
Publication Date:
May 08, 1992
Filing Date:
September 26, 1990
Export Citation:
Assignee:
YAMAHA MOTOR CO LTD
International Classes:
F01L1/02; F01L1/04; F01L1/26; F02B75/22; (IPC1-7): F01L1/02; F01L1/04; F01L1/26
Attorney, Agent or Firm:
Tsutomu Shimoichi