 |
 |
|
|
HYPER
VTEC , Valve Control System with Valve Pausing Mechanism
|
Development
of "Direct actuated” Type Valve Control System for the Engines
of Sports Type Motorcycles.
With the growth of interest in global environmental protection,
measures are being actively taken also in the development of
motorcycles, such as the improvement of fuel consumption rate,
cleaning exhaust gas and the reduction of driving noise. The
reconciliation of the measures for environmental protection
and engine output is a technically difficult problem.
Honda has developed a "direct-actuated" type valve control system,
"HYPER VTEC" (Variable valve timing and lift electronic control
system), which will reconcile engine output and environmental
protection measures for sports type motorcycle engines, for
which high rotation and high power are required.
Honda has thus far developed variable valve control systems,
such as the REV mechanism developed for motorcycles in 1983,
VTEC mechanism having further developed the REV mechanism and
recognized worldwide for application to automobiles and various
VTEC mechanisms controlling variable valves by incorporating
hydraulic circuit in locker-arms.
For sports type motorcycle engines, however, the mainstream
is a "direct-push dynamic" valve system, in which cams directly
drive valves, from the need of pursuing high revolution and
high power. Sports type motorcycle engines requiring a high
revolution zone of over 10,000rpm is commonly used at times.
To reconcile such high revolution and high power with environmental
protection measures, an entirely new and compact "direct-actuated"
valve type variable valve control system with built-in hydraulic
mechanism in valve lifters, HYPER VTEC, was developed. The HYPER
VTEC is at present the only VTEC system without passage through
the locker arms, including those used for automobiles.
* HYPER VTEC is a trademark of Honda Motors Co.,
Ltd.
|
 |
|
|
