Valve mechanism of internal combustion engine

Details Valve mechanism of internal combustion engine Valve mechanism of internal combustion engine

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.

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