| 摘要 |
Provided is an internal combustion engine with a variable actuation valve mechanism, which can suppress an excessive friction increase while preventing the pump-up of a hydraulic type rush adjuster. In case a critical rotating speed, at which the inertial force (F2) of the variable actuation valve mechanism exceeds the maximum load (P2max) of a lost motion spring, is designated by a first engine rotating speed (N1), and in case a critical rotating speed, at which the inertial force (F1) of a valve and a rocker arm exceeds the maximum load (P1max) of a valve spring, is designated by a second engine rotating speed (N2), the maximum loads (P1max and P2max) are set so that the first engine rotating speed (N1) may be lower than the second engine rotating speed (N2).
|
