| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve gear capable of changing the valve opening timing and valve opening period of an engine valve while being capable of miniaturizing in size.SOLUTION: A valve gear 20A comprises: a rotatable first cam shaft 21; a first cam piece 23 provided non-rotatably in the first cam shaft 21; a second cam shaft 22 internally capsulated in the first cam shaft 21 and being coaxially rotatable; a second cam piece 24 provided non-rotatably in the second cam shaft 22; a housing 25A; a first vane rotor 26A accommodated in the housing 25A rotatably and relatively to the housing 25A; and a second vane rotor 27A accommodated in the housing 25A rotatably and relatively to the housing 25A and the first vane rotor 26A, in which the first vane rotor 26A is non-rotatably connected to the second cam shaft 22; and the second vane rotor 27A is non-rotatably connected to the first cam shaft 21.SELECTED DRAWING: Figure 3 |
