Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1992-06-24
1994-09-20
Cross, E. Rollins
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9017, F01L 134
Patent
active
053479629
ABSTRACT:
A valve mechanism of an internal combustion engine is of a type which has at least two cams for each intake (or exhaust) valve. One cam is shaped to allow the associated engine to exhibit a marked fuel saving characteristic and the other cam is shaped to also the engine to produce a higher torque at relatively low (or high) engine speed. Upon a cam switching between these cams, at least one of the cams is subjected to a phase change before and/or after the actual cam switching. As a result, the undesired shock at the cam switching is eliminated or at least minimized.
REFERENCES:
patent: 4768475 (1988-09-01), Ikemura
patent: 5018487 (1991-05-01), Shinkai
patent: 5031583 (1991-07-01), Konno
patent: 5159905 (1992-11-01), Sugiuchi et al.
patent: 5168851 (1992-12-01), Itoyama et al.
Komatsu Hiroshi
Nakamura Makoto
Sakuragi Shigeru
Cross E. Rollins
Lo W.
Nissan Motor Co,. Ltd.
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