Development of the Directly Actuated Variable Valve Control System 1999-01-3319
New valve control system (HYPER VTEC:Variable Valve Timing and Lift Electronic Control System) having valve inactive mechanism which engine power is made to be united to the environment conservation was developed for motorcycle engines of sport type having higher engine speed. Mass increase in the valve operating system of this system is kept to a minimum with a compact, simple mechanism. The system enables high engine speed up to 13,500 rpm without abnormal motion of valves, having high reliability and durability. In addition, the valve control system has the enhancement of fuel economy and the effect of decreasing the intake and exhaust system sound during 2-valve operation. The switching mechanism part of the operating valve number was manufactured by cold forging, and has decreased costs. This system has been adopted to the sport type motorcycle CB400SF for domestic model in 1999.
Citation: Tsukui, T., Tsutsumizaki, K., and Nakajima, M., "Development of the Directly Actuated Variable Valve Control System," SAE Technical Paper 1999-01-3319, 1999, https://doi.org/10.4271/1999-01-3319. Download Citation
Author(s):
Takaaki Tsukui, Koji Tsutsumizaki, Mutsuo Nakajima
Affiliated:
Honda R&D Co., Ltd.
Pages: 8
Event:
Small Engine Technology Conference & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Actuators-PT-74, Design of Racing and High-Performance Engines 1998-2003-PT-100, Proceedings of the 1999 SAE Small Engine Technology Conference-P-348
Related Topics:
Electronic control systems
Control systems
Fuel economy
Valves
Exhaust systems
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