| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve switch actuation response between a first cam and second cam in a variable valve system. <P>SOLUTION: A valve camshaft 16 is composed of a first camshaft 16a equipped with low-lift second cams 18i and 18e and connected with a timing transmission device 8, and a second camshaft 16b equipped with high-lift first cams 17i and 17e, which penetrates the first camshaft 16a on the same axis and disposed to enable relative rotation and to make an axial movement impossible. An engaging part 31 is formed in the first camshaft 16a. Meanwhile, the second camshaft 16b is engaged with a clutch member 30, and then with an engaging part 31. Spline connection is made to slide between a coupling position A, which connects between the first and second camshafts, 16a and 16b with a predetermined phase relation, and a uncoupling position B, which secedes from the engaging part 31 and disconnect between the first and second camshafts, 16a and 16b. After that, A clutch shifting means 32, which is freely supported by this clutch member 30 for axial direction sliding at the second camshaft 16b, is connected. <P>COPYRIGHT: (C)2012,JPO&INPIT |
