Patent ID: RE41714

Claim:
A valve characteristic changing apparatus for an internal combustion engine comprising: a first mechanism group which include at least one first varying mechanism that changes a valve characteristic of at least one first engine valve; a second mechanism group which include at least one second varying mechanism that changes a valve characteristic of at least one second engine valve; a first power source group including at least one first power source for the first mechanism group; and a second power source group including at least one second power source for the second mechanism group; wherein a kind of the at least one first power source is different from a kind of the at least one second power source, the at least one first varying mechanism changes both an opening timing and a closing timing of the at least one first engine valve as the valve characteristic of the at least one first engine valve, and the at least one second varying mechanism changes both an opening timing and a closing timing of the at least one second engine valve as the valve characteristic of the at least one second engine valve , and the valve characteristic of the at least one first engine valve changed by the at least one first varying mechanism is the same as the valve characteristic of the at least one second engine valve varied by the second varying mechanism .